JPH07726Y2 - Rivet concealing structure for synthetic resin products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is a rivet of a synthetic resin product capable of increasing the locking strength of a cap that conceals the head of a rivet and ensuring sufficient waterproofness. Concealment structure.

[Prior Art] Conventionally, in a container made of a synthetic resin or the like, a rivet exposed to the outside of the product is covered with a cap in order to prevent deterioration of appearance quality of the product and ensure waterproofness.

The concealing structure of such rivets is shown below in FIG. That is, the outer member 12 forming the outer surface of the product and the inner member 13 disposed on the back surface of the outer member 12 are fastened together by the metal rivet 11, and the rivet exposed on the outer surface of the product. The head 15 of 11 is fitted with a cap 16 that conceals the head 15 and maintains the appearance quality of the product, and the outer peripheral edge of the head 15 has a tapered surface 17 that forms an acute angle with the outer member 12. Are formed.

The cap 16 is an internal hollow member made of synthetic resin, and engages with the head portion 15 having the tapered surface 17 formed inside the outer peripheral edge thereof that abuts the outer member 12. The dowel 18 is formed in a protruding manner. Then, the coupling claw 18 surrounds the tapered surface 17, and the tapered surface 17
The cap 16 is locked to the head portion 15 by closely contacting with.

Further, in the middle portion of the head portion 15, a body portion 19 penetrating from the outer surface of the outer member 12 to the back surface side of the inner member 13 is integrally formed with the head portion 15, and formed. The inner member
Inside the hollow portion 21 extending from the extended end portion 20 of the body portion 19 located on the back surface of 13 to the surface of the head portion 15, the extended end portion 20 is provided.
A wedge 22 that expands into a substantially spherical shape is press-fitted. And
The rivet 11 fastens the outer member 12 and the inner member 13 by the head portion 15 and the extending end portion 20.

[Problems to be Solved by the Invention] However, in such a conventional rivet concealing structure, the tapered surface 17 formed on the outer peripheral edge of the head portion 15 of the rivet 11 makes an acute angle with the outer member 12. Is doing. That is, the tapered surface 17 is the cap.
It is a surface that is inclined with respect to the direction in which 16 disengages (the direction of arrow B). For this reason, the locking strength of the cap 16 is weak, and when the cap 16 made of synthetic resin is acted in the direction of separation by an external force such as the cap 16 being pressed, the cap 16 is There was a risk that it would come off the head 15.

Since the rivet 11 is made of metal, the head 15
The sealing property between the outer member 12 and the outer member 12 is not sufficient, and particularly when the surface of the outer member 12 has irregularities such as a pattern, a gap is formed between the both, and the waterproofness of the synthetic resin product is low. It was insufficient.

Further, since the rivet 11 has the tapered surface 17 formed on the outer peripheral edge of the head portion 15, the rivet 11 is less used in other products and the price is higher. Therefore, it has been an obstacle to reducing the production cost of synthetic resin products using rivets.

The present invention has been made in view of such conventional problems, and in the synthetic resin product, the cap that covers the head of the rivet is prevented from falling off, sufficient waterproofness is obtained, and the cost is low. An object of the present invention is to provide a rivet concealing structure for synthetic resin products.

[Means for Solving the Problems] In order to solve the above problems, in the present invention, an outer surface of a synthetic resin product is provided with an outer member forming the outer surface and a back surface of the outer member. The head portion of the rivet for fastening the inner member is exposed, and a trunk portion penetrating to the back surface side of the inner member is extended and formed in the middle of the head portion from the extended end portion of the trunk portion. In the hollow portion reaching the outer surface of the head,
In a rivet concealing structure of a synthetic resin product, a wedge for expanding the extended end portion of the body portion into a substantially spherical shape is press-fitted, and a synthetic resin cap for concealing the head portion is attached to the head portion, A washer made of a member having elasticity smaller than the outer diameter of the head is provided between the outer member and the head, and the washer opposes the outer member located on the outer peripheral portion of the head. The locking surface and the outer peripheral surface of the washer form an annular step portion, and an annular engaging piece directed from the outer peripheral edge of the cap to the inside of the cap is engaged with the step portion of the synthetic resin product. It has a rivet concealment structure.

[Operation] In the above configuration, when the outer member and the inner member are fastened together by the rivet, the head of the rivet presses the washer against the outer member. At this time, even if there are irregularities such as patterns on the surface of the outer member, since the washer is made of a member having elasticity, the washer is appropriately deformed in the pressing direction and is brought into close contact with the surface of the outer member. Become.

Further, the stepped portion is formed by the outer peripheral portion of the washer provided between the outer member and the head portion of the rivet, and the surface located on the outer peripheral portion of the head portion and opposed to the outer member. ing. Therefore, when a force is applied to the cap from the outside and the cap is actuated in a direction in which the cap is disengaged from the head, the annular engagement piece of the cap engaged with the stepped portion is the outer peripheral portion of the head. And the engaging surface that opposes the outer member, that is, the surface that is substantially perpendicular to the detaching direction of the cap is pressed.

Further, the engaged step portion of the annular engaging piece of the cap is formed by providing the washer between the outer member and the head portion of the rivet body.
Therefore, the cap can be locked to the head without processing the outer peripheral edge of the head.

[Embodiment] An embodiment according to the present invention will be described below with reference to the drawings. That is, as shown in FIG. 1, the outer member 12 that forms the outer surface of the synthetic resin product and the inner member 13 that abuts the back surface of the outer member 12 are fastened to each other by the rivet 1. Rivet 1 exposed on the outer surface of
The head 2 is covered with a cap 3 which prevents deterioration of the appearance quality of the product. The outer member 12 and the head 2
A washer 4 made of a synthetic resin, that is, a member having elasticity is sandwiched between and. The washer 4 has a diameter smaller than the outer diameter of the head 2, and the washer 4
The outer member located on the outer peripheral surface 5 and the outer peripheral portion of the head 2.
The locking surface 6 opposed to 12 forms an annular step 7.

On the other hand, the cap 3 is an internal hollow member made of synthetic resin, and an annular engaging piece 8 directed toward the inside of the cap 3 is provided on the outer peripheral edge of the cap 3 that abuts the outer member 12. The cap 3 is formed by engaging the annular engaging piece 8 with the annular step 7.
Is locked to.

Further, a body portion 19 penetrating from the outer surface of the outer member 12 to the back surface side of the inner member 13 is integrally formed in the middle portion of the head portion 2. A wedge 22 for expanding the extension end 20 into a substantially spherical shape is press-fitted inside the hollow portion 21 extending from the extension end 20 of the body 19 located on the back surface to the surface of the head 2. There is. Then, the rivet 1 fastens the outer member 12 and the inner member 13 by the head portion 2 and the extending end portion 20.

In the above configuration, since the washer 4 is made of synthetic resin, when the rivet 1 fastens the outer member 12 and the inner member 13, the head 2 of the rivet 1 is tightened.
Is pressed by the outer member 12 and is appropriately deformed in the pressing direction to be in close contact with the surface of the outer member 12.
For this reason, even if the surface of the outer member 12 has irregularities such as a pattern, the washer 4 is appropriately deformed and brought into close contact with the surface of the outer member 12. Therefore, the sealing property between the head part 2 and the outer member 12 is improved, and the waterproof property of the synthetic resin product is secured.

Further, an outer peripheral portion 5 of the washer 4 held between the outer member 12 and the head portion 2 of the rivet 1, and a locking surface located on the outer peripheral portion of the head portion 2 and opposed to the outer member 12. The step portion 7 is formed by 6 and 6. For this reason,
When a force is applied to the cap 3 from the outside and the cap 3 is actuated in a direction in which the cap 3 is detached from the head 2 (the direction indicated by an arrow A in FIG. 1), the annular engagement of the cap 3 engaging with the step 7 The joint piece 8 is brought into pressure contact with the locking surface 6, that is, a surface substantially perpendicular to the detaching direction of the cap 3 (the direction indicated by the arrow A).

At this time, since the locking surface 6 is substantially perpendicular to the detaching direction of the cap 3, the annular engaging piece 8 is not easily disengaged from the step portion 7. Therefore, the locking strength of the cap 3 on the head 2 is strong, and it is possible to prevent the cap 3 from coming off when a force is applied from the outside.

On the other hand, the step portion 7 with which the annular engaging piece 8 of the cap 3 is engaged is formed by providing the washer 4 between the outer member 12 and the head portion 2 of the rivet 1. Therefore, the cap 3 can be locked to the head 2 without processing the outer peripheral edge of the head 2. Therefore, as the rivet 1, it is possible to directly use the rivet 1 which is used for other products which does not hide the head 2. Therefore, it is possible to reduce the manufacturing cost of the synthetic resin product.

[Effects of the Invention] As described above, the present invention provides a synthetic resin on the head of a rivet that fastens an outer member forming the outer surface of a synthetic resin product and an inner member that abuts the back surface of the outer member. In a rivet concealing structure of a synthetic resin product with a cap made of metal, a washer made of an elastic member is provided between the outer member and the head, so that the washer is appropriately deformed and the outer member is deformed. It is possible to improve the sealing property between the outer member and the head of the rivet by closely contacting the surface of the rivet. Therefore, the waterproofness of the synthetic resin product can be sufficiently ensured.

Further, the washer has a diameter smaller than the outer diameter of the head portion, and an annular step portion is formed by an outer peripheral surface of the washer and a locking surface that opposes the outer member positioned on the outer peripheral portion of the head portion. Since the rivet is formed, the cap can be locked to the head even if a relatively inexpensive rivet having general versatility is used. Therefore, it is possible to reduce the manufacturing cost of the synthetic resin product.

Further, an annular engaging piece that is directed toward the inside of the cap is formed on the outer peripheral edge of the cap, and the cap engages with the head by engaging the annular engaging piece with the annular step. I was set to stop. Therefore, even when a force is applied to the cap from the outside and the cap is acted in the direction of separating from the head, the annular engaging piece is not easily disengaged from the step. Therefore, the locking strength of the cap on the head is increased, and it is possible to prevent the cap covering the head of the rivet of the synthetic resin product from falling off.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment according to the present invention, and FIG. 2 is a sectional view showing a conventional example. 1 ... Rivet, 2 ... Head, 3 ... Cap, 4 ...
Washer, 6 ... Locking surface, 7 ... Step, 8 ... Annular engagement piece.

Claims (1)

[Scope of utility model registration request] 1. A head portion of a rivet for fastening an outer member forming the outer surface and an inner member disposed on the back surface of the outer member is exposed on the outer surface of the synthetic resin product, and the head portion is exposed. A trunk portion penetrating to the back surface side of the inner member is formed by extension in the middle part of the inner member, and a hollow portion reaching the outer surface of the head from the extended end portion of the trunk member is extended by the extension of the trunk portion. In the rivet concealing structure of a synthetic resin product, in which a wedge for expanding the projecting end portion into a substantially spherical shape is press-fitted, and a synthetic resin cap for concealing the head is attached to the outer member and the head. Between the part, a washer made of an elastic member having a diameter smaller than the outer diameter of the head is provided, and a locking surface that opposes the outer member located on the outer peripheral portion of the head, An outer peripheral surface of the washer forms an annular step, and the outer peripheral edge of the cap extends from the cap. Rivet concealed structure of the synthetic resin product annular engagement pieces directed to the inside, characterized in that engaged with the stepped portion.