JP4906816B2 - Connection structure of shaft member and pipe material - Google Patents

Description

  The present invention is suitable for, for example, connection between a leg of an automobile roof rail and a roof rail body, strengthens press-fitting strength, securely and firmly connects a shaft member and a pipe member having different hardness, and reduces pressure input. The present invention relates to a connecting structure between a shaft member and a pipe material, which can use a press-fitting machine of a specified roof rail and can use the press-fitting machine rationally.

  For example, instead of using bolts, nuts and screws, as a means for connecting a leg of an automobile roof rail and a roof rail body, there are those in which the leg is fitted to the roof rail body and connected via an adhesive (for example, , See Patent Document 1).

  However, in the above connection method, it is necessary to cure the connection part between the leg and the roof rail main body in an unloaded state during the curing process of the adhesive. Therefore, the roof rail main body is placed side by side and cured. Has a problem of requiring a wide curing space because it is relatively long.

  Therefore, in order to solve the above problem, a plurality of bead-shaped convex portions are provided at the connecting end portion of the leg, the convex portions are press-fitted into the roof rail body, and the leg is fixed to the roof rail body before the adhesive is cured. By connecting with strength, the legs and the roof rail body are cured vertically or suspended, and the curing space is made compact (see, for example, Patent Document 2).

Such a connection method is intended for a case where a synthetic resin leg is press-fitted into an aluminum roof rail body, and can be realized by a predetermined amount of elastic deformation of the convex portion during press-fitting.
However, for example, in order to strengthen the strength of the roof rail, if the legs are made of a harder material than synthetic resin, the elastic deformation of the same degree as described above cannot be obtained at the convex portions, so the legs can be press-fitted into the roof rail body. The connection method described above cannot be adopted.
In addition, when the convex portion is composed of a hard member, it requires processing accuracy to obtain a certain elastic deformation, and when this is based on machining, the processing cost increases and productivity decreases. The improvement of the connection method that solves the problem has been desired.

Utility Model Registration No. 2587183 JP 2007-62558 A

  The present invention solves such a problem, for example, suitable for connection between a leg of an automobile roof rail and a roof rail body, strengthens press-fitting strength, and securely and firmly connects a shaft member and a pipe material having different hardnesses, An object of the present invention is to provide a connecting structure between a shaft member and a pipe material, which can reduce the pressure input and can use a press-fitting machine of a roof rail of another specification, and can rationally use the press-fitting machine.

According to the first aspect of the present invention, there is provided a shaft member in which a plurality of locking projections having pointed ends on the peripheral surface of the connecting end portion are formed in the axial direction, and the shaft member can be press-fitted and has a lower hardness than the shaft member. In a connection structure between a shaft member and a pipe member, which has a pipe member and is connected with an adhesive interposed between the pipe member and the shaft member, a plurality of engagements are provided over an intermediate portion or a rear peripheral surface of the connection end portion. A stop convex part is formed apart in the axial direction, and when the shaft member is press-fitted, the pointed end part is bitten into the inner surface of the pipe material so that it can be worn, and the worn pointed part is disposed on the inner surface of the pipe material, Promotes wear or wear of the tip, smoothes the press-fitting of the tip or shaft member and reduces the pressure input, and uses a press-fit machine for soft materials. to increase the area, constant locking protrusion by placing the pointed end which is worn on the tube inner surface And, to strengthen the press fit strength, and so as to connect the shaft member and the tube member reliably and firmly.

The invention of claim 2, the engaging convexed latch portion is formed in the thin triangular plate, urged abrasion or wear of the tip portion during press-fitting, so as to achieve a reduction in smooth press-fitting force of the press-fitting of the tip or shaft member I have to.
In the invention of claim 3, a plurality of locking guides having pointed ends are formed on the taper surface on the distal end side of the connecting end portion in the same direction as the locking convex portion, and prior to press-fitting of the locking convex portion. The locking guide is inserted into the pipe, the adhesive applied in the pipe is scraped and moved quickly, and the locking projection is moved to the scraped path to facilitate press-fitting and reduce pressure input. ing.
According to a fourth aspect of the present invention , the locking guide is formed in a triangular pyramid shape that gradually decreases in diameter toward the distal end side of the connection end portion, and the adhesive applied in the tube material is scraped and moved smoothly and quickly .

According to the first aspect of the present invention, a plurality of locking projections are formed apart from each other in the axial direction over an intermediate portion or a rear peripheral surface of the connection end portion, and when the shaft member is press-fitted, the pointed end portion is formed on the inner surface of the pipe material. Since the worn tip is placed on the inner surface of the pipe material , the worn tip is worn or worn at the time of press-fitting , and the press-fitting of the tip or shaft member is facilitated and the pressure input is reduced. In addition to using a press-fitting machine for soft materials, the contact area with the inner surface of the pipe is increased by wear or wear of the tip, and the worn tip is placed on the inner surface of the pipe to fix the locking projection, thereby increasing the press-fitting strength. The shaft member and the tube material can be securely and firmly connected to each other.
The invention of claim 2, the engaging convexed latch portion from forming a thin triangular plate, urged abrasion or wear of the tip portion during press-fitting, achieving a reduction in smooth press-fitting force of the press-fitting of the tip or shaft member be able to.

In the invention of claim 3, since a plurality of locking guides having pointed ends are formed on the taper surface on the tip end side of the connecting end portion in the coaxial direction with the locking convex portion, prior to press-fitting of the locking convex portion. The locking guide is inserted into the pipe material, the adhesive applied in the pipe material is scraped and moved quickly, and the locking convex part is moved to the scraped path to facilitate press-fitting and reduce pressure input. Can do.
According to the fourth aspect of the present invention , since the locking guide is formed in a triangular pyramid shape that gradually decreases in diameter toward the distal end side of the connection end portion, the adhesive applied in the pipe material can be scraped and moved smoothly and quickly .

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will now be given of an illustrated embodiment in which the present invention is applied to a connection between a leg of a roof rail for an automobile and a roof rail main body. In FIGS. 1 to 5, reference numeral 1 denotes a roof rail made of a pair of left and right aluminum tubes which are pipe members constituting the roof rail. The main body is formed by extruding or drawing thick aluminum and bending it in a three-dimensional direction, and its cross-sectional shape is formed into an irregular triangle or trapezoid as shown in FIG.

The roof rail bodies 1 and 1 are disposed on the roof (not shown) of the automobile in the front-rear direction and spaced apart from each other, and a large chamfered portion (not shown) is formed at the opening edge of the front and rear ends. A connecting end 2a of a leg 2 made of aluminum die casting, which is a shaft member, is attached to the opening end.
In the illustrated embodiment, the roof rail body 1 disposed on the left side of the roof (not shown) and the front leg 2 attached to the front side thereof are illustrated, but the rear leg or the front and rear legs of the right roof rail body 1 are illustrated. In addition, the present invention is applied.

The leg 2 is formed in a substantially elongated plate shape that can be attached to a roof (not shown), bolt insertion holes 3 and 3 are provided at front and rear positions thereof, and a positioning pin 4 protrudes downward therebetween. Yes.
A substantially airfoil-shaped plate fin 6 projects from one side of the leg 2 via a reinforcing piece 5, and a cap (not shown) is attached on the plate fin 6.

The connecting end portion 2a of the leg 2 is formed into an irregular trapezoidal shape as shown in FIG. 5, the tip side peripheral surface thereof is formed into a tapered and gently tapered shape, and two locking portions are formed on the upper side of the tapered surface. A guide 7 projects in the axial direction.
A substantially hemispherical convex portion 8 is provided at the center of the lower end of the distal end portion of the connecting end portion 2a, and the convex portion 8 is immersed in an adhesive before curing, which will be described later, so that the accuracy and stability of the press-fitting position are stabilized. I try to plan.

  The locking guide 7 is formed into a triangular pyramid or taper shape that gradually decreases in diameter toward the distal end as shown in FIG. 4, and the peripheral surface of the connecting end 2 a behind the locking guide 7 has a substantially straight axis shape. A plurality of locking projections 9 are formed on the peripheral surface so as to protrude at intervals, and are arranged on the same axis as the locking guide 7.

The cross-sectional shape orthogonal to the press-fitting direction of the locking projection 9 is formed in a triangular shape having a pointed end 9a as shown in FIG. 4, and the pointed end 9a is formed in a minute curved surface in the embodiment. The portion 9a is pressed into the inner surface of the roof rail body 1 and is pressed into it.
The length of the locking projection 9 in the circumferential direction is formed to be approximately the same width as the width of the base portion of the locking guide 7, and the thickness thereof is formed to be approximately the same width as the interval between them.
In this way, a press-fitting machine (not shown) of the leg 2 made of synthetic resin, which will be described later, is provided to promote wear and wear of the tip 9a during the press-fitting, and to reduce the press-fitting and smooth press-fitting. Can be shared.

In the figure, reference numeral 10 denotes a concave hole formed in the lower surface of the rear end side of the connection end 2a. When the connection end 2a is inserted into the roof rail body 1, the drain or exhaust through-hole 11 formed in the rail body 1 is provided. Communication is possible.
12 is a projecting portion projecting on both sides of the opening of the recessed hole 10, and can be engaged with the inner surface of the roof rail body 1, and 13 is a wide projecting portion projecting on the side surface of the connection end 2 a, The inner surface of the roof rail body 1 can be engaged, and the convex portion 12 and the convex portion 13 stabilize the connection end portion 2a during press-fitting.

Then, a uniform gap 14 is formed in the entire region between the connection end 2a and the inner surface of the roof rail body 1 via the locking projections 9, 9, the projections 12, 12, and the projection 13. The gap 14 is filled with an adhesive 15 heated to a predetermined temperature.
The adhesive 15 reacts with moisture to enhance the adhesive force, and after solidification, for example, a reactive hot melt having appropriate flexibility and flexibility is used. In addition, 16 is a concave hole opened in the upper part outside the connection end 2a.

The connection end 2a is connected to the roof rail body 1 through a press-fitting machine (not shown) using an actuator such as an air cylinder.
The press-fitting machine has a pair of leg holders arranged opposite to each other, and a set surface formed on the same curved surface as the roof panel (not shown), and after the lower surfaces of the front and rear legs are in close contact with the set surface, The roof rail body 1 having an adhesive 15 applied inside is inserted between the connection ends 2a, 2a, the pair of leg holders are moved close to and away from each other via an actuator, and the roof rail body 1 has front and rear sides at both ends. The legs 2 and 2 can be press-fitted.
In the press-fitting machine according to the embodiment, a press-fitting machine for press-fitting front and rear legs 2 and 2 made of synthetic resin with different specifications is shared in an aluminum roof rail main body 1 for rationalization.

The connecting structure of the shaft member and the tube material thus configured is applied to the aluminum die-cast leg 2 of the automobile roof rail as the shaft member, and is applied to the aluminum roof rail body 1 slightly softer than the leg 2 as the tube material. is doing.
Then, a tapered locking guide 7 that gradually decreases in diameter on the tapered surface side of the connecting end portion 2a of the leg 2 is projected, and is formed on the peripheral surface of the straight axis side of the connecting end portion 2a on the coaxial line. A plurality of locking projections 9 are projected at intervals, and the roof rail body 1 is slightly thick.
The locking guide 7, the locking projection 9, and the projections 8, 12, 13 can be formed uniformly and accurately by die casting, and the roof rail body 1 can also be formed uniformly and accurately.

Next, when the manufactured leg 2 is connected to the roof rail body 1, a pair of front and rear legs 2, 2 and a predetermined roof rail body 1 are prepared, of which the front and rear legs 2, 2 are press-fitted (not shown). ) And the lower surface thereof is brought into close contact with the set surface, and the connection end portions 2a and 2a are arranged to face each other.
Thereafter, a gel-like adhesive 15 heated to a predetermined temperature is applied to the inner surfaces of both ends of the roof rail body 1 by appropriate means, and the connection ends 2a and 2a are inserted inside thereof.

Thus, the press-fitting machine is operated to press-fit the connection end portions 2a, 2a into the opening end portion of the roof rail body 1.
If it does in this way, the air inside the roof rail main body 1 will be extruded outside through the through-hole 11, and the press-in of the said connection end parts 2a and 2a will be performed easily and rapidly.

In the press-fitting, first, the locking guide 7 is inserted into the roof rail body 1, and then the locking projections 9 are sequentially inserted into the roof rail body 1.
At that time, since the locking guide 7 is formed in a tapered taper shape, the adhesive 15 is scraped and moved quickly, and the locking projection 9 moves along the scraped path, and the pointed end portion 9a. Bites into the inner surface of the roof rail body 1 and pushes forward.

When the connecting end 2a is inserted, the convex portion 13 engages with the side portion of the inner surface of the roof rail body 1 from the middle period to the latter period, and in the latter period, the convex portions 12, 12 are on the lower surface of the inner surface of the roof rail body 1. The connection end 2a is positioned substantially in the center by these engagements, and a uniform gap 14 is formed around the connection end 2a. Therefore, the adhesive 15 is uniformly distributed, and an accurate and reliable press-fitting and a good adhesion state are formed.
At that time, the convex portion 8 provided on the lower surface on the distal end side of the connection end portion 2a is immersed in the adhesive 15 before being cured, and the connection end portion 2a in the roof rail body 1 is prevented from being twisted or shaken, and thus stable. Encourage press-fitting. This situation is as shown in FIG.

When the locking projection 9 is inserted into the roof rail body 1 in this way, a minute grinding groove or scratching groove is formed on the inner surface of the rail body 1, and the subsequent locking projection 9 moves through the grinding groove. Scratch forward.
The tip 9a is worn or worn by the grinding, the contact area with the inner surface of the roof rail body 1 is increased, the stability of the locking projection 9 is improved, and an adhesive is provided between the locking projections 9. 15 moves and hardens.

Thus, the latching convex portion 9 has the pointed portion 9a and is arranged intermittently in the press-fitting direction, and as a result, is formed in a thin plate shape, it is continuously bead-shaped in a hemispherical section. As compared with the one formed in the above, wear or wear of the tip portion 9a is promoted, and the press-fitting is smoothly performed and the partial pressure input is reduced.
Therefore, it is possible to use a press-fitting machine (not shown) of the leg 2 made of synthetic resin in spite of press-fitting of the locking projection 9 which is harder than before, and a rational use of the press-fitting machine (not shown). Can be used.

Thereafter, the press-fitting machine is released to remove the roof rail body 1 with the legs 2 and 2 connected to the front and rear, and this is moved to a predetermined curing space.
In this case, the adhesive 15 is not sufficiently formed in the course of the primary curing which gradually cools, but the plurality of locking projections 9 bite into the inner surface of the roof rail body 1 and press fit, and the front and rear legs 2 , 2 are connected to each other with a predetermined strength, so that there is no change in the press-fitted state or misalignment of the connection position.
Therefore, the roof rail body 1 can be quickly removed and moved after the connection.

  Therefore, it is not necessary to hold the roof rail body 1 to which the front and rear legs 2 and 2 are connected to the press-fitting machine until the adhesive 15 is primarily cured as in the prior art, and the use of the partial press-fitting machine becomes possible. , Productivity of roof rail is improved.

Moreover, since the front and rear legs 2 and 2 are connected with a predetermined strength by the press-fitting, the roof rail body 1 can be cured in a vertically placed state or in a suspended state, and the amount of the curing space can be reduced accordingly.
Even in such a case, the front and rear legs 2 and 2 or the roof rail body 1 does not move by gravity and does not peel off from the adhesive 15, thereby preventing a decrease in adhesive strength and a decrease in appearance of the joint. .

  After the adhesive 15 is cured, caps (not shown) are attached to the front and rear legs 2 and 2, and the front and rear legs 2 and 2 are attached to the roof panel of the automobile via bolts, nuts, and screws. Desired use becomes possible.

  In this case, as described above, the adhesive 15 has appropriate flexibility and flexibility after curing, so that the weight and vibration of the load on the roof rail are absorbed and transmitted to the front and rear legs 2, 2, and the roof rail body 1. The load on the joint between the front and rear legs 2 and 2 is reduced, and deformation and breakage of the joint are prevented.

  As described above, the connecting structure between the shaft member and the pipe material of the present invention enhances the press-fitting strength, connects the shaft member and the pipe material having different hardness reliably and firmly, and reduces the pressure input so that the roof rail of another specification can be used. Since the press-fitting machine can be used and the press-fitting machine can be used rationally, it is suitable for connecting, for example, a leg of a car roof rail and a roof rail body.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a state of connection between a roof rail leg and a roof rail main body to which the present invention is applied, and shows a roof rail main body arranged on the left side and a front leg thereof. A part of the front view of FIG. It is sectional drawing which expands and shows the principal part of FIG. 2, and has shown the connection condition of the connection edge part of a leg, and a roof rail main body. It is the perspective view which expands and shows the principal part of FIG. 1, and has shown the latching guide and latching convex part of the connection end part of a leg. It is sectional drawing which follows the AA line of FIG.

Explanation of symbols

1 Tube material (roof rail body)
2 Shaft member (leg)
2a Connection end part 8 Convex part 9 Locking convex part 9a Pointed part 15 Adhesive

Claims (4)

A shaft member in which a plurality of locking projections having pointed ends on the peripheral surface of the connection end portion are formed in the axial direction, and a tube material capable of press-fitting the shaft member and having a lower hardness than the shaft member, In the connection structure between the pipe member and the shaft member connected by interposing an adhesive between the pipe member and the shaft member, a plurality of locking projections are provided in the axial direction over an intermediate portion or a rear peripheral surface of the connection end portion. The connection between the shaft member and the pipe material, wherein the shaft member is formed so as to be worn away when the shaft member is press-fitted so that the tip end portion bites into the inner surface of the tube material and is worn. Construction. The connection structure of the shaft member and pipe material of Claim 1 which formed the said latching convex part in the shape of a thin triangular plate . 2. A connecting structure between a shaft member and a tube material according to claim 1 , wherein a plurality of locking guides having pointed ends are formed on the taper surface on the tip end side of the connecting end portion in the same direction as the locking projection . The connection structure between the shaft member and the tube material according to claim 3, wherein the locking guide is formed in a triangular pyramid shape that gradually decreases in diameter toward the distal end side of the connection end portion .

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