JPH08312618A - Rivet - Google Patents

Abstract

PURPOSE: To provide a rivet which can be fixedly secured in the flat condition, and can be surely fixedly secured to a thin plate without playing. CONSTITUTION: This rivet is constiuted of a rivet main body 1 and a wedge member 2, and the rivet main body 1 is provided with a pair of flange members 3a, 3b forming a head part 3, connecting belts 5, 6 connecting together both flange members spacedly by a fixed space 8, and short leg parts 4, 4 hanging down from the respective flange members and having lock claws 10, 10 being derived on the outside of the lower ends. Meanwhile, the wedge member 2 is provided with a fitting-in part 13 thrusting in the space 8 between the flange members 3a, 3b so as to obstruct contraction of the diameter of the leg parts 4, 4. The leg parts 4, 4 of the rivet main body 1 are passed in a through hole provided on a plate to be joined and both faces of the plate is held with the head part 3 and the lock claws 10, 10, and then the fitting-in part 13 of the wedge member 2 is pressfitted in the space 8 extending between the leg parts 4, 4 from the head part side, and fixedly secured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rivet used for fixing parts to a plate portion or connecting plates to each other in a contact surface form.

[0002]

2. Description of the Related Art Plastic rivets are widely used for assembling components in home electric appliances, automobiles and the like. Various types of plastic rivets are provided according to the places where they are used as stoppers, but basically, they are configured so that the plate and the parts or the plates can be fixed in contact with each other. FIG. 11 shows an example of the most common plastic rivet.
The rivet shown here is a rivet main body 103 in which a leg portion 102 whose leg end is expandable is vertically provided from a lower surface of a collar-shaped head portion 101, and a rod-shaped pin 1 from a lower surface of the head portion 104.
And a wedge member 106 in which 05 is vertically provided. In this rivet, the main leg portion 102 is first inserted into a through hole penetrating the plates A and B to be joined, and the head 1 is attached to one surface of the plate A.
01 is brought into contact with the head portion 101, and then the pin 105 of the wedge member 106 is press-fitted into an insertion hole (not shown) formed from the upper surface of the head portion 101 toward the center of the leg portion 102, and penetrates under the other plate B. Further, the leg end of the leg portion 102 is expanded and the leg end and the head portion 101 sandwich and fix the two plates A and B.

In this rivet, the plate members (or the plate and the parts) are easily fixed by inserting the leg portion mainly of the rivet into the through hole formed in the plate and by pressing the wedge member into the fitting hole provided in the rivet main body. It has a feature that it can be joined,
The drawback is that the legs penetrate the plate and project to the opposite side greatly, so that each space must be prepared on the back side of the plate and the legs are expanded for fastening. As a result of pushing open the through hole to be drilled, the through hole expands due to brittleness and the locking force is lost due to brittleness, causing rattling.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been developed to improve the above-mentioned drawbacks while adopting the ease of handling of the above-mentioned conventional plastic rivets. The thickness of the plate to be fixed to the thickness as close as possible to minimize the space in the used part,
In particular, it is an object of the present invention to provide a rivet improved so that it can be used even in a narrow use space inside devices.

Further, in addition to the above-mentioned object, the present invention can be used for a thin plate having a small rigidity without losing the fixing force, and the rivet main body and the wedge member are connected in a certain form so that the plate is fixed and used. It is an object of the present invention to provide a rivet which is improved in workability and is convenient in handling and storage management by always keeping both bodies as one even when it is carried out in a small form.

[Means for solving problems]

The features of the rivet of the present invention developed for such a purpose will be described. The rivet of the present invention is composed of a rivet main body and a wedge member, and the rivet main body cooperates with one head. A pair of flange members, a connecting band that keeps a required space between the two flange members, and holds the space between the two flange members in a freely contractible manner, and hangs in a confronting manner from the lower surface of each flange member. And has short legs that face the lower surface of the edge of each collar member at a required distance, while the wedge members are spaced apart from each other on the back side, while the wedge member is the gap between the collar members. The rivet is characterized in that it has a fitting portion to be fitted between both leg portions through the through hole, and an empty portion for reduction is provided in the fitting portion.

Further, according to the present invention, a locking projection is provided on one or both of the inner surfaces of the rivet-based legs, and the locking protrusion is provided on the fitting portion of the wedge member fitted between the other legs. Another object of the present invention is to provide a rivet characterized in that a locking recess is provided corresponding to the projection.

Another object of the present invention is to provide a rivet characterized in that the wedge member is connected and connected through a hinge piece to a connecting band for connecting a collar member mainly composed of rivets.

Still further, according to the present invention, the connecting band is passed between the end portions of the pair of collar members which constitute the rivet main body,
It is an object of the present invention to provide a rivet characterized in that a hinge piece is extended outward from an outer edge of the connecting band so that the wedge member and the flange member are flush with each other.

[0010]

[Operation] The rivet according to the present invention is constructed as described above. When joining plates together, the legs mainly of the rivet are inserted into the through holes that are drilled in the plates, and the lower surface of the head part of the plate is one plate. The engaging claws that are brought into contact with the respective legs and provided on the respective leg portions are pulled out to the back side of the other plate. At this time, the leg portion vertically extending from each flange member deforms the connecting band when the locking claw passes through the through hole, and temporarily reduces by using the interval between the legs to allow the locking claw to pass. become.

In this state, when the fitting portion of the wedge member is fitted into the leg portions through the gap between the brim members, the leg portions are expanded up to the fitting portion and the locking claws of the other are extended. The plate that protrudes to the back side of the plate and is superposed with the head is caught and held. At this time, when the distance between the legs is narrow and resistance is generated in the press-fitting of the fitting part of the wedge member, the fitting part elastically shrinks by utilizing the shrinking empty part, and the press-fitting is allowed, and the fitting is completed. At this point, the elastic restoring force acts on the legs as an expanding force to secure the close contact of the plates with the through holes and to join and fix the plates without rattling.

Further, in the rivet of the present invention, when the fitting portion is press-fitted between the leg portions, the locking concave portion provided in the fitting portion receives the locking convex portion provided on the inner surface of the leg portion to be locked. While preventing the escape of
When the fitting part is pressed in the pull-out direction, the fitting part is contracted by utilizing the contraction vacant part, and the engaging concave and convex parts can be disengaged and pulled out, thereby releasing the plate fixed state mainly by the rivet. can do.

On the other hand, in the above-mentioned operation, the connecting band mainly composed of the rivet forms a head by connecting the collar members to each other, and the wedge member is connected to the rivet main body at a certain position through the hinge piece. The hinge piece is stopped, and the hinge piece is bent toward the space between the collar members and the fitting portion is guided along with the bending of the hinge piece to assist the fixing work. Next, embodiments of the present invention will be described in detail with reference to the drawings.

[0014]

1 to 10 of the drawings show an embodiment of a rivet according to the present invention. 1 is a front view of a rivet, FIG. 2 is a rear view, FIG. 3 is a plan view, FIG. 4 is a right side view, FIG. 5 is a bottom view, FIG. 6 is a central longitudinal section left side view, and FIG. 7 is a perspective view. FIG. 8 is a perspective view in which the left half is cut away at the central portion. In the figure, 1 is mainly a rivet, and 2 is a wedge member.

The rivet main body 1 is composed of a head 3 and a leg 4, and the head 3 is composed of a pair of collar members 3a and 3b and connecting bands 5 and 6 connecting the two collar members. It is provided so as to hang from the lower surfaces of the two collar members 3a and 3b. The head portion 3 shown here is formed to have a substantially disc shape by combining two collar members 3a and 3b,
The flange members 3a and 3b having a semi-disc shape have a straight edge 7.
While a and 7b are opposed to each other in parallel at an interval of 8 and the connecting bands 5 and 6 which are passed to both ends thereof maintain the interval 8,
One head 3 is configured.

The two connecting bands 5 and 6 for connecting the collar members 3a and 3b are provided between both ends of the collar member. Then, it is formed to have a thickness of about 1/2 of the wall thickness of the collar member and is aligned with the lower surface of each collar member, and thereby is passed between the lower half portions of the wall thickness of the collar member,
Paragraph 9 is formed between the upper surface and the upper surface of the collar member.

The legs 4 and 4 are short legs having a semicircular cross section that hang down along the straight edges 7a and 7b of the collar members 3a and 3b, respectively. The space 8 is provided between the legs 4, 4.
Are provided so as to extend, and the inner surfaces of the leg portions that form a plane face each other. The outer surfaces of the leg portions forming the arcuate surface are at positions retracted from the outer edges of the collar members 3a and 3b forming the arcuate shape, and form jaws on the lower surface of the collar member.

The two legs 4 and 4 are formed into a substantially short cylindrical body by combining the two legs, and the cylindrical body has a through hole a formed in two plates A and B which will be described later. , B and have a diameter approximately equal to this diameter. Further, locking claws 10 are provided at the lower ends of the arc-shaped outer surfaces of the leg portions 4 and 4 so as to oppose the lower surface of the collar member and project outward. There is.

The locking claw 10 is formed in an arc shape along the circumferential direction, and is provided with a space approximately equal to the plate thickness of the two plates A and B joined to the lower surface of the flange member. There is. On the other hand, on the smooth circular side surfaces of the leg portions 4 and 4 facing each other, locking convex portions 11 and 11 having arcuate raised surfaces are provided so as to face each other near the leg ends, and in this portion, a space between both leg portions is provided. Is narrowed.

Incidentally, connecting bands 5, 6 for connecting the collar members 3a, 3b.
Among them, the front connecting band 6 is formed in a slender shape so as to enhance flexibility, so that the space 8 can be easily narrowed when both the flange members are brought inward, so that the leg portion will be described later. The insertion work is made easy.

Although not shown, the connecting bands 5 and 6 can be freely bent so that the interval 8 can be narrowed as the head 3 is formed by connecting the two brim members. However, when the wedge member 2 to be described later is press-fitted, if the gap 8 is made expandable so that it can be expanded from a constant width, a tight joint between the through holes a and b and the leg portions 4 and 4 is obtained, and effective fixation is achieved. The state will be obtained. In addition, in this case, the above-mentioned stretchability also weakens the rigidity of the connecting bands 5 and 6, and the disk shape of the head 3 collapses accordingly. If the band 6 is, for example, a band bent in an arc shape or a connecting band bent in a dogleg shape instead of the shape of the linear band shown in the drawing, a band which can be expanded by bending or bending while avoiding the above-mentioned drawback. Can be

On the other hand, the wedge member 2 is press-fitted into the space 8 of the rivet main body 1 to prevent the diameter reduction of the leg portions 4 and 4. In this embodiment, the wedge member 2 is located in the space 8 between the collar members 3a and 3b. It is composed of a substrate 12 which is fitted into the base plate 12 to fill it, and a fitting part 13 which is vertically provided from the lower surface of the substrate 12 and which is inserted between the leg parts 4 and 4.

The substrate 12 fills the space 8 between the upper surfaces of the two connecting bands 5 and 6 and has the upper surfaces of the two brim members 3a, 3a.
It becomes a part of the head 3 aligned with the upper surface of 3b, and this can be formed in a substantially disc shape. Further, the fitting portion 13 vertically extending from the lower surface of the base plate 12 has a lateral width and a vertical width which fill the gap between the leg portions 4 and 4 through the space between the two coupling bands 5 and 6 and connect the heights. The lengths between the upper ends of the belts 5 and 6 are aligned with the lengths of the leg ends of the leg portions 4 and 4 so that they are aligned with the leg ends when fitted.

The fitting portion 13 is provided with a slit vertically from the lower end to divide the fitting portion into left and right halves for reduction.
Is provided so that the width can be reduced by utilizing this empty portion. Then, on each of the outer side surfaces of the divided pieces, there is a groove-shaped locking which corresponds to the locking projections 11 provided on the rivet-based legs 4 and 4 in the front-rear direction and whose bottom has a concave arc surface. Recesses 15, 15 are provided.

In the figure, 16 is a hinge piece that connects the rivet main body 1 and the wedge member 2. This hinge piece is extended so as to be derived at a right angle from the outer circular portion of the one connecting band 5, and is connected to one end of the substrate 12 so as to extend along the lengthwise direction of the space 8 between the collar members 3a and 3b. The substrates 12 are positioned so that their lengths are the same. The hinge piece is thin and freely bendable. The wedge member 2 provided on the back side of the head 3 mainly composed of rivets is folded back so that the fitting portion 13 of the wedge member 2 can be fitted into the space 8 from above the head. Is done.

The rivet of the present invention is constructed as described above and is formed by injection molding or the like using a thermoplastic resin, for example, a resin having a required rigidity and elasticity such as nylon as a raw material. Of course, in this case, it is manufactured on the assumption that it is mass-produced, but as shown in each drawing, the rivet main body 1 and the wedge member 2 may be connected in series through the connecting band 5 and the hinge piece 16 and integrally molded.

The actual use of the rivet according to the present invention having the above-mentioned structure will be described below. In joining plates, first, the legs of the rivet main body 1 are first inserted into the through holes a and b penetrating the overlapped plates A and B. Face the parts 4 and 4 and press them in, and
When the lower surface of 3b is brought into contact with one plate A, the locking claws 10 provided at the leg ends are passed and locked to the lower surface of the other plate B. In inserting the leg portions 4 and 4, the connecting claws 5 and 6 are bent by utilizing the space 8 between the leg portions 4 and 4, and the diameter is reduced by the deformation, and the locking claw is formed larger than the diameter of the through holes a and b. Pass 10 and 10. After this passage, the locking claws 10, 10 are hooked on the lower surface of the plate B by restoring the connecting band.

The two plates A and B overlapped by the passage of the locking claws 10 are temporarily fixed by the rivet main body 1. In this state, the hinge piece 16 is then bent and the base plate 12 of the wedge member 2 is raised so as to be superposed on the upper surface of the head part 3, so that the base plate 12 is hung vertically from the base plate 12 toward the space 8 opened in the central part of the head part 3. The insertion part 13 to be guided is guided and interrupts during this interval. The fitting portion 13 is formed to be equal to the space 8 or slightly larger to receive some resistance when it is interrupted.
When the upper surface of is pressed toward the head 3, the fitting portion 13 contracts using the space portion 14 and enters the space 8. When the tips collide with the locking projections 11 and 11 of both legs 4 and 4, they further shrink and enter, and the locking projections 11 and 11 are received in the locking recesses 15 and 15, and press fitting is performed. It will be completed and a fixed state will be obtained.

When the press-fitting of the fitting portion 13 is completed, the substrate 12 is embedded in the space 8 and the upper surface thereof is aligned with the upper surface of the head 3 to form a disc shape together with the head 3 to form a simple button. It becomes the shape. Further, the fitting portion 13 cut between the leg portions 4 and 4 is integrated with the leg ends and integrated, and the locking claws 10 projecting from the outer peripheral surfaces of the lower ends of the both leg portions are flange-shaped to form a small disc shape. Similarly, it will have the shape of a button.

For this reason, although the fitting portion 13 slightly expands the main leg portions 4 and 4, it mainly prevents the leg portions 4 and 4 from being reduced in diameter and is attached to the lower surface of the plate B. The engagement of the locking claws 10, 10 to be stopped is ensured, and the head member 3 and the locking claws 10, 10 mainly composed of the rivet are formed on both sides of the plates A, B by coupling the wedge member 2 and the rivet main body 1. It becomes a button and is fixedly joined.

On the other hand, in the rivet of the present invention in which the plates are joined together in this manner, when the free end of the base plate 12 of the wedge member 2 is pryed out by using an appropriate tool, the fitting portion 13 is contracted and the fixed state is released. can do. At this time, since the rivet is not damaged at all when it is released, it can be reused. Moreover, when the rivet is reused, the hinge piece 16 is used to guide the wedge member 2 mainly to the rivet and easily return to the fixed state. What can be done is as described above.

[0032]

The present invention has been described in detail with reference to the embodiments. However, according to the rivet of the present invention, the leg portions are short and do not largely protrude from the surface of the plate to be joined, so that the mounting space is restricted. Therefore, it is very advantageous for joining plates in the narrow interior of devices, fixing parts, etc.
Further, since it can be temporarily fixed by mounting mainly on the rivet, workability is good, and since it is connected to the wedge member via the hinge piece and the mutual positional relationship is specified, the connecting work between the both is easy. It is also advantageous in terms of handling and storage management.

Further, in the rivet of the present invention, the locking claws provided on the legs are engaged with one surface of the plate without expanding the legs which are passed through the through holes of the plate, and the locking claws of the locking claws are pressed by the wedge member. It prevents receding, and at the time of fixing, it is fixed by sandwiching both sides of the plate with both the locking claw and the head mainly composed of rivets.Thus, even when fixing thin plates or plates and parts, the through hole There is an advantage that a stable fixed state can be secured without weakening the engaging force by pushing and opening or causing backlash.

Of course, the rivet of the present invention has the advantages that it is suitable for mass production using synthetic resin as a material, is excellent in manufacturability, and is competitive in price compared with the conventional rivet.

[Brief description of drawings]

FIG. 1 is a front view of a rivet.

FIG. 2 is a rear view of the rivet.

FIG. 3 is a plan view of a rivet.

FIG. 4 is a right side view of the rivet.

FIG. 5 is a bottom view of the rivet.

FIG. 6 is a left side view of the center of the rivet.

FIG. 7 is a perspective view of a rivet.

8 is a perspective view of the rivet shown in FIG.

FIG. 9 is a plan view of the usage state.

FIG. 10 is a rear view of the usage state in which the right half is a cross section in the central portion.

FIG. 11 is a diagram illustrating a usage state of a conventional example.

[Explanation of symbols]

 1 Rivet Main Body 2 Wedge Member 3 Head 3a, 3b Collar Member Forming Head 4 Leg 5, 5 Connection Band 8 Interval 10 Locking Claw 11 Locking Convex 12 Base of Wedge Member 13 Fitting 14 For Reduction Empty space 15 Locking recess 16 Hinge piece

Claims (4)

[Claims] 1. A rivet comprising a rivet main body and a wedge member, wherein the rivet main body is provided between a pair of flange members that jointly form one head and between both flange members. Edge of each collar member, and a connecting band that maintains the distance between the collar members and keeps the distance freely reduced, and locking claws that extend vertically from the lower surface of each collar member in opposition to each other and that are derived from the outer surface facing each other. On the lower surface, there are short leg portions facing each other at a required interval, while on the other hand, the wedge member has a fitting portion fitted between both leg portions through a distance between the brim members, and for reducing the inside of the fitting portion. A rivet characterized by having an empty portion. 2. The method according to claim 1, wherein one or both of the legs of the rivet-like leg are provided with protrusions on the inner surface of the protrusion, and the other of the legs has a fitting portion of a wedge member fitted between the legs. The rivet is characterized in that a locking recess is provided corresponding to the locking projection. 3. The rivet according to claim 1, wherein the wedge member is formed by connecting and connecting via a hinge piece to a connecting band for connecting the collar member mainly composed of the rivet. 4. The connection band according to claim 3, wherein the connecting band is passed between the end portions of the pair of collar members forming the rivet main body, and the hinge piece is extended outward from the outer edge of the connecting band. A rivet characterized in that a wedge member and a flange member are provided on the same plane.