JPH0725444Y2 - Clamp device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used when a cover body is detachably fastened to a container-shaped body such as the body of an air cleaner of an automobile engine and its cover body. The present invention relates to a clamp device.

[0002]

2. Description of the Related Art Air cleaners for automobile engines are often made of synthetic resin for the purpose of weight reduction. In such an air cleaner made of synthetic resin, a container-shaped main body and a cover body to be covered with the main body are detachably fastened by a clamp piece made of an arc-shaped metal plate whose base end is pivotally attached to the main body. I am trying.

An example of such a clamp device is shown in FIG. A curling portion 52 is formed at the base end of the clamp piece 51 of this one, and the curling portion 52 is rotatably supported by a pin 55 having a head between a pair of side walls 54 integrally provided on the main body 53. It is pivotally attached. The tip of the pin 55 is crimped to prevent the pin from coming off.

On the other hand, as shown in FIG.
And the curling portion 52 of the clamp piece 51 is formed leaving a gap 57 so that its tip is separated from other portions, and the curling portion 52 is formed by the gap 57. A clamp device having a structure in which the shaft portion 56 is elastically pushed is proposed (see Japanese Utility Model Laid-Open No. 57-42157).

[0005]

As shown in FIG. 7, the structure using the insertable pin 55 has a problem that not only the number of parts is large, but also the assembly is troublesome. On the other hand, as shown in FIG. 8, the one in which the shaft portion 56 made of synthetic resin is integrally formed with the main body 53 has an advantage that the number of parts can be reduced, but on the other hand,
Since the strength of the shaft portion 56 tends to be insufficient, the center of the shaft portion 56 and the main body 53 are connected by a rib 58 to secure the strength, and a slit 59 for avoiding the rib 58 is formed in the center of the curling portion 52. I need to put it in. Therefore, the structure of the parts is complicated and the manufacturing cost is increased.

Moreover, when the curling portion 52 of the clamp piece 51 is so-called snap-in in which the curling portion 52 is fitted to the shaft portion 56, the gap 57 in the curling portion 52 is forced against the large spring force. Since the snap-in is difficult because it has to be widened, in addition to this, when molding the shaft portion 56 with a synthetic resin, the parting lines of both dies are changed to the shaft portion 56. Therefore, a burr is generated on the outer peripheral surface of the shaft portion 56 due to the parting lines of the two molds, and the snap-in must be performed beyond the burr. Since the snap-in is more difficult, the snap-in requires a great deal of work and the clamp piece 5 The it can not be easily removed.

In addition, the shaft portion 56 made of synthetic resin is
Since a large bending force is applied when the snap-in is performed and when the cover body is fastened to the main body, there is a problem that the shaft portion 56 is broken. SUMMARY OF THE INVENTION It is a technical object of the present invention to solve the problems of the conventional clamp device, to provide a clamp device that is extremely easy to manufacture, assemble and disassemble, and has excellent durability. .

[0008]

In order to achieve this technical object, the present invention provides a support portion having a pair of side walls provided on a main body, and a base end pivotally attached to the support portion. A clamp device comprising a tubular portion and an elastic clamp piece, each of which is provided at the other end with an engaging portion that is detachably engaged with a cover body of the main body, wherein the supporting portion has the clamp piece. While providing a block piece with which the outer peripheral surface on the side of the cover body contacts the outer peripheral surface of the cylindrical portion in, the at least one side wall of the both side walls is fitted into and engaged with the cylindrical portion of the clamp piece. Providing a stop protrusion,
Further, a configuration is provided in which the tubular portion of the clamp piece is provided with a cutout portion that allows the engagement of the retaining protrusion with the tubular portion when the clamp piece is rotated in the direction of the cover body. I chose

[0009]

In order to attach the base end of the clamp piece to the support portion, first, with the clamp piece rotated in the direction of the cover body, the notch of the tubular portion is directed toward the support portion, and the retaining protrusion is attached. The protrusion is fitted into and engaged with the tubular portion by passing through the notch. Then, when the clamp piece is turned outward (away from the cover body), the cutout portion of the tubular portion turns to the side or the lower side of the retaining protrusion. As a result, the retaining protrusion is engaged with the edge of the tubular portion, and the clamp piece can be attached to the support portion so as to be rotatable and not to be detached at a normal rotation angle. That is, the clamp piece can be rotatably attached to the support portion on the main body side by appropriately rotating the clamp piece as described above. Since it is not necessary to spread the part against the spring force, it can be installed very easily.
By performing the reverse order, the clamp piece can be removed from the main body very easily.

Next, when the cover body is attached to the main body having the support portion and clamped, the clamp piece is rotated in the fastening direction (direction of the cover body) and the elastic force of the clamp piece is utilized. Then, the cover body can be tightened with respect to the main body by pressing the edge portion of the cover body with the engaging portion, and at this time, the cylindrical portion at the proximal end of the clamp piece is attached to the main body side. Since the block piece is in contact with the block piece provided on the support portion and supports the tightening force by the block piece, the tightening force does not act on the retaining protrusion.

That is, in the clamp device of the present invention, the clamping force of the cover body with respect to the main body is supported by the block piece, while the clamp piece is prevented from falling off from the supporting portion by removing the clamp piece from the tubular portion. This is done by the engagement of the stop projections.

[0012]

Therefore, according to the present invention, the clamp piece can be attached to or detached from the main body side as compared with the above-mentioned conventional one, and the assembly and disassembly thereof are required. The number of steps can be greatly reduced, and moreover,
When assembled, disassembled, and tightened, it is possible to reliably prevent breakage and the like, and to significantly improve durability.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A clamp device according to an embodiment of the present invention will be described below with reference to the drawings. The clamp device for fastening the cover body to the main body of the air cleaner made of synthetic resin in an automobile will be described in detail below as a representative, but the present invention is not limited to such a case, and a tool box and its lid, etc. Needless to say, it can be widely adopted when two members are detachably fastened.

In the drawings, reference numeral 1 is a main body of an air cleaner used in an automobile engine, and reference numeral 2 is a cover body which is put on the main body. The cover body 2 is different from the main body 1 in that the clamp piece 3 and the support portion 4
It is removably fastened by a clamp device consisting of. The clamp piece 3 is formed by curving a leaf spring as in the conventional case, but is characterized by the configuration on the base end 5 side.

That is, when the support portion 4 is integrally provided on the upper portion of the main body 1, the curling is formed by inwardly winding the upper end of the bent portion 7 bent upward from the lower end of the arc-shaped spring portion 6. The portion 8 constitutes a tubular portion. Further, on both sides of the tip of the curling portion 8, as shown in FIG.
And, as shown in FIG. 3, by cutting out notches 9a and 9b,
A space between the two cutouts 9a and 9b serves as an introduction portion 10 having a narrow width w.

Further, as shown in FIG. 3, on the free end 11 side of the clamp piece 3, an engaging portion 12 folded back in a U-shape,
The finger rest 13 that follows it is formed. Clamp piece 3
Is usually formed of a leaf spring, but is not limited to this in the present invention, and may be made of another elastic material such as synthetic resin (particularly engineering plastic).

On the other hand, the supporting portion 4 is a block piece 1 integrally protruding radially outward from the outer periphery of the upper portion of the main body 1.
4 and a pair of left and right side walls 15a, 15b integrally protruding from the main body 1 on both sides of the block piece 14 in parallel with each other.
It consists of and. A semi-cylindrical concave surface 16 that contacts the curling portion 8 is formed on the lower surface of the block piece 14 so as to open downward.
A slanted downwardly inclined surface 17 is formed so as to extend smoothly. The cutout portion 18 on the upper surface of the block piece 14 is for fitting with the step portion 19 on the lower surface of the cover body 2.

The distance between the side walls 15a and 15b is
The width is substantially the same as the width of the clamp piece 3 (that is, the width W of the curling portion 8), and the inner surface of both side walls 15 a and 15 b is provided with a semi-cylindrical concave surface 16 at a substantially central position as a retaining projection. The pin 20a, which is one embodiment,
20b are integrally formed. Both pins 20
The distance between the tips of a and 20b is such that both pins 20a and 20b
Introducing part 1 of clamp piece 3 so that b can pass through both notches 9a and 9b in said curling part 8.
The size is set to be slightly larger than the width w of 0.

As shown in FIG. 2, the block piece 14
Between the side walls 15a and 15b and the side walls 15a and 15b.
21b is formed, and the lengths of both pins 20a, 20b are made substantially the same as the gaps 21a, 21b. However, when molding the main body 1 with synthetic resin, both pins 20a, 20b are formed at the same time. This is for removing the mold when molding.

Further, it is not essential that the two pins 20a and 20b are paired on the left and right, and the pin 20a may be integrally formed on only one of the side walls 15a as shown in FIG. In the case of this embodiment, the other side wall 15b is integrated with the block piece 14, and the clamp piece 3
In the curling part 8 in FIG.
a is provided.

The clamp device having this structure is assembled as follows. First, as shown in FIG. 5, the clamp piece 3
Is tilted so that the free end 11 side thereof enters the inside of the main body 1, and in this state, as shown by the solid line in FIG. 5, after the curling portion 8 is positioned between the both side walls 15a and 15b of the support portion 4, By pulling up the entire clamp piece 3 in the direction of arrow A as indicated by the chain double-dashed line in FIG. 5, both pins 20a and 20b on both wall sides 15a and 15b are inserted into the curling portion 8 so that the curling portion is 8 through the notches 9a and 9b. Therefore, the clamp piece 3 is rotated in the direction away from the main body 1, that is, in the opening direction (arrow B direction). When the hand is released in this state, as shown by the solid line in FIG.
The back surface of the bent portion 7 is caught by the a and 20b, and the inclined surface 17 is formed.
Since the clamp piece 3 is in contact with the main body 1 in a stable state
Since it is pivotally attached to the main body 1, the work of attaching the clamp piece 3 to the main body 1 can be performed very easily as compared with the conventional work.

As described above, the clamp piece 3 once attached is rotatably held by the support portion 4 with some play, and the cover body 2 is covered, as well as the normal rotation angle. Then, both pins 20a, 20b
The clamp piece 3 can be removed from the main body 1 by performing the reverse order, and after the attachment, as shown in FIG. When the filter element F is mounted, the filter element F prevents the clamp piece 3 from rotating inward of the main body 1, so that the clamp piece 3 can be removed from the main body 1 unless the filter element F is removed. There is no.

Then, as shown by the solid line in FIG. 6, the clamp piece 3 is first opened to the outside, the cover body 2 is covered on the main body 1, and the clamp piece is pushed until the engaging portion 12 gets over the edge of the cover body 2. 3 is rotated in the direction of arrow C. Thereby, the cover body 2 can be fastened to the main body 1 with a force corresponding to the elasticity of the spring portion 6. At that time, since the curling portion 8 of the clamp piece 3 contacts the concave surface 16 of the block piece 14, the tightening force of the cover body 2 on the main body 1 can be supported by the block piece 14, and the both pins 20
It is possible to prevent the tightening force from acting on a and 20b.

In the illustrated embodiment, the clamp piece 3 is used.
Although the base end of the clamp body 3 is pivotally attached to the main body 1 side and the engaging portion at the other end of the clamp piece 3 is engaged with the cover body 2, the present invention is not limited to such a case, and the clamp Piece 3
The base end of the is pivotally attached to the cover body 2 side, while the clamp piece 3
The engaging portion at the other end may be configured to engage with the main body 1 side.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a clamp device of the present invention.

FIG. 2 is a plan view of a support portion and a base end of the clamp device of FIG.

3 is a side view showing a clamp piece of the clamp device of FIG. 1. FIG.

FIG. 4 is a plan view of an essential part showing another embodiment of the clamp device according to the present invention.

FIG. 5 is a cross-sectional view of essential parts showing the procedure for attaching the clamp device in FIG. 1.

FIG. 6 is a cross-sectional view of essential parts showing an operating state of the clamp device of FIG. 1.

FIG. 7 is a perspective view showing an example of a conventional clamp device.

FIG. 8 is a perspective view showing another example of a conventional lamp device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 main body 2 cover body 3 clamp piece 4 support part 5 base end 8 curling part 9a, 9b cutout part 12 engaging part 14 block piece 15a, 15b side wall 20a, 20b pin

Claims (1)

[Scope of utility model registration request] 1. A support portion having a pair of side walls provided on a main body, a tubular portion pivotally attached to the support portion at a base end thereof, and a cover body of the main body at the other end. In a clamp device comprising an elastic clamp piece each having an engaging portion that is detachably engaged, the support portion has an outer peripheral surface on the cover body side of an outer peripheral surface of a cylindrical portion of the clamp piece. While providing a block piece that abuts, at least one side wall of the both side walls is provided with a retaining protrusion that fits and engages with the tubular portion of the clamp piece, and further, in the tubular portion of the clamp piece, A clamp device, wherein a notch portion is provided so as to allow a fitting engagement of the retaining protrusion with the tubular portion in a posture in which the clamp piece is rotated in the direction of the cover body.