JPH0676708U - Clamp mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] It is assembled without applying force so that it does not get inside the main body when the lid is opened. The end of the rotating end 41 is formed in a U shape that is folded back to the outside, and the clamp piece 40 is turned upside down and hooked on the rotating shaft member 32 to cause the tightening end 42 side. When raising it, the arms 31a2 of the support walls 31a, 31c
The protrusions 31a2a and 32c2a formed on 32c2 allow rotation in the causing direction and prevent rotation in the opposite direction. Therefore, the clamp piece 40 does not fall off. In addition, the support wall 31b is inserted into the notch 41b formed at the rotating end 41, and the clamp piece 4 is cut depending on the depth of the notch 41b.
Restrict the range of 0 rotation.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a clamp mechanism, and more particularly, to a clamp mechanism suitable for use in fixing an air cleaner cap on an air cleaner case of a vehicle.

[0002]

[Prior art]

 Conventionally, as this type of clamping mechanism, one for an air cleaner disclosed in Japanese Utility Model Laid-Open No. 57-42157 is known. 19 and 20 show the clamp mechanism disclosed in the publication. The clamp piece 1 shown in the publication has a substantially C-shaped cross section, and one end of the clamp piece 1 is rounded to form a turning end 1a which is cylindrical. A pair of support walls 2a is projected on the side surface of the air cleaner case 2, and the rotating shaft 3 is held by both support walls 2a. The rotary shaft 3 penetrates the rotary end 1a of the clamp piece 1 and holds the clamp piece 1 in a rotary manner. On the other hand, the upper opening of the air cleaner case 2 is covered with an air cleaner cap 4, and the clamp piece 1 is attached to the upper surface of the edge of the air cleaner cap 4 corresponding to the position where the clamp piece 1 is arranged. The other tightening end 1b of the clamp piece 1 is formed with a pressing end 4a which is pressed from above when the clamp piece 1 is rotated to the up 4 side.

At the time of assembling, the turning end 1a of the clamp piece 1 is held between both supporting walls 2a, and the supporting wall 2a and the turning end 1a of the clamp piece 1 are penetrated from the outside of one supporting wall 2a. The rotary shaft 3 is inserted so that Then, the end of the rotary shaft 3 is caulked. When fastening, the opening of the air cleaner case 2 is covered with the air cleaner cap 4, and the clamp piece 1 is rotated and pushed into the air cleaner cap 4 side. Then, the tightening end 1b rides up on the pressing end 4a of the air cleaner cap 4, and presses the air cleaner cap 4 to the air cleaner case 2 side for fastening. On the other hand, in the one disclosed in Japanese Utility Model Laid-Open No. 59-84257, instead of providing a rotating shaft as shown in FIG. 21, a holding portion 2b having a C-shape when viewed from the side is formed, and a clamp piece is provided here. The rounded rotary end 1a of the No. 1 is pushed in.

[0004]

[Problems to be solved by the device]

 The conventional clamp mechanism described above has the following problems. In the former clamp mechanism, the rotary shaft must be penetrated into the rotary end while supporting the clamp piece, and the workability is poor. Also, the clamp pieces may rotate into the inside of the air cleaner case when the air cleaner cap is removed.Therefore, it is necessary to rotate each clamp piece outside the air cleaner case when installing the air cleaner cap. Occurs. On the other hand, in the latter clamp mechanism, it is necessary to apply force to push the clamp pieces into the holding portion during the work of attaching the clamp pieces, and if a large number of them are assembled, the burden on the operator becomes extremely large.

The present invention has been made in view of the above problems, and provides a clamp mechanism that can be assembled without applying too much force and that does not get inside the main body when the lid is opened. To aim.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the invention according to claim 1 is such that, when the lid to be covered on the opening of the main body is fastened, it is formed in a substantially C-shaped cross-section, and at one rotation end, the rotary shaft of the main body is attached. In a clamp mechanism having a clamp piece that is rotatably fixed to the main body and the other clamp end presses and holds the pressing end of the lid toward the main body, the rotary shaft is separated from the main body by approximately the thickness of the clamp piece. The turning end is formed in a U shape in which the end portion is warped outward, and the pressing end is rotated in the direction near the lid near the turning shaft. While permitting, a rotation restricting portion that restricts rotation in a direction away from the lid is provided.

Further, in the invention according to claim 2, in the clamp mechanism according to claim 1, a notch is formed in the U-shaped rotating end, and a peripheral surface of the rotating shaft is formed. It is configured to include a convex piece that enters the cutout and regulates the rotation amount.

[0008]

[Action]

 In the invention according to claim 1 configured as described above, the rotating end of the clamp piece is formed in a U-shape that is outwardly warped, and the clamp piece is turned upside down by 180 degrees to open the end portion. With the tip facing downward, and the tip is inserted between the main body and the rotating shaft. After inserting, raise so that the clamp end of the clamp piece is upward with the rotation axis as the fulcrum. At this time, the rotation restricting part allows the clamp piece to rotate in the raising direction, but if it rotates in the opposite direction, the engagement between the rotation shaft and the rotation end will be released. , Restrict rotation in this direction.

Further, in the invention according to claim 2 configured as described above, the convex piece formed on the peripheral surface of the rotation shaft is inserted into the notch formed at the rotation end serving as a fulcrum at the time of rotation. Therefore, the range in which the protruding piece can rotate within the notch can be adjusted by the notch amount.

[0010]

[Effect of device]

 As described above, according to the present invention, the assembly work is completed simply by raising the clamp piece by inserting the end portion whose direction is reversed by 180 degrees between the rotary shaft and the main body, and then the force is applied. It is possible to provide a clamp mechanism capable of completing the assembly without applying the clamp mechanism. Further, according to the invention of claim 2, the rotatable range of the clamp piece can be easily limited. For example, if the clamp piece is prevented from unnecessarily wrapping around inside the main body, workability is improved. Can be improved.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In this embodiment, the clamp mechanism is used to fasten the case and cap of the vehicle air cleaner. FIG. 1 is a view of a clamp mechanism according to an embodiment of the present invention as seen from the outside, and FIG. 2 is a vertical sectional view in a use state. In the figure, the air cleaner case 10 having an opening at the top is formed such that the opening edge portion is horizontally extended outward and the peripheral edge portion is folded back downward, and the end portion has the opening oriented downward. It has a U-shaped cross section. On the other hand, the air cleaner cap 20 that covers the opening of the air cleaner case 10 has its end portion once expanded horizontally outward, and then the peripheral end portion thereof is bent downward to form a step at the end portion. It forms a concave part. However, at the portion where the peripheral edge portion is bent downward, it is slightly projected upward so as to form a locking projection wall 21 described later.

The clamp support portion 30 is formed so as to project to the outside of the wall surface of the air cleaner case 10 which is folded back downward, and the clamp piece 40 is rotatably locked by the clamp support portion 30 at the lower end, The upper end is locked to the locking protruding wall 21 of the air cleaner cap 20. 3 is a perspective view of the clamp piece 40, FIG. 4 is a side view, and FIG. 5 is a front view. The clamp piece 40 has a convex surface on the front side of the strip and a concave surface on the back side, and is formed in a substantially C-shaped cross section. The rotating end 41 at the lower end is formed by cutting out the central portion of the strip to form a fork, and the respective claw-shaped portions 41a, 41a in the fork are folded outward 180 degrees to form a U-shaped cross section. The bifurcated notch 41b is adjusted in the notch amount as described later. On the other hand, the upper clamping end 42 is folded outward 180 degrees to form a curved portion 42a facing the inside of the clamp piece 40, and the end portion is further bent upward to form a knob piece 42b. There is. A step 43 is formed so that the vicinity of the turning end 41 has a slightly wider width and the other portions have a slightly narrower width.

FIG. 6 is a top view of the clamp support portion 30, FIG. 7 is a sectional view, FIG. 8 is a front view, FIG. 9 is a perspective view, and FIG. 10 is a bottom view. The clamp support portion 30 is provided with three support walls 31a to 31c protruding in a rib shape toward the outside of the air cleaner case 10. The distance between the support walls 31a and 31c on both sides of the clamp piece 40 is the same. The width is substantially equal to the width of the turning end 41, and the distance between the support walls 31a and 31c on both sides and the central support wall (convex piece) 31b is equal to the width of the claw-like portion 41a. The central support wall 31b has a shorter protruding length than the outer support walls 31a and 31c. In the lower part between the support walls 31a and 31b and the support walls 31b and 31c, cylindrical rotating shaft members 32 and 32 oriented in the horizontal direction are formed, and the rotating shaft members 32 and the air cleaner case 10 are connected to each other. A gap is formed between them, into which the claw-like portion 41a of the clamp piece 40 can be inserted.

Notches 31a1 and 31c1 are formed in the central portions of the outer support walls 31a and 31c in the projecting direction from the bottom to the middle, and the support walls 31a outside the notches 31a1 and 31c1 are formed. , 31c are arm portions 31a2, 31c2 that can be curved in the facing direction. Protrusions 31a2a and 31c2a are formed on the tips of the upper portions of the arm portions 31a2 and 31c2 so as to face each other. The upper faces of both protrusions 31a2a and 31c2a are flat, but the lower face approaches upward. Therefore, it is an inclined surface that approaches the respective support walls 31a and 31c. The notches 31a1 and 31c1 can be omitted if the elasticity of the arm portions 31a2 and 31c2 can be secured. Next, the operation of this embodiment having the above configuration will be described. At the time of assembling, as shown in FIG. 11, the rotating end 41 is directed upward, the clamping end 42 is directed downward, and the clamp piece 40 is vertically rotated 180 degrees. In this state, the clamp piece 40 is brought close to the clamp support portion 30. At this time, the portion above the step 43 becomes slightly wider and fits snugly between the support walls 31a and 31c, and the portion below the step 43 becomes slightly narrower, so that the supporting walls 31a and 31c are slightly narrower. The protrusions 31a2a and 31c2a protruding from the tip do not hinder the insertion of the clamp piece 40.

As shown in FIG. 12, the claw-shaped portions 41a, 41a folded back to the outside are slidably brought into contact with the wall surface of the clamp support portion 30 on the air cleaner case 10 side, and the clamp piece 40 is pulled down. As the rotary shaft member 32 is inserted into the U-shaped rotary end 41 as it is pulled down and enters the rotary end 41 deeply, as shown in FIG. 13, the rotary shaft member 32 is used as a fulcrum to tighten the tightening end 42. Cause upwards. The side of the turning end, which is wide when it is raised, comes into contact with the protrusions 31a2a, 31c2a of the arm portions 31a2, 31c2 formed on the support walls 31a, 31c from the lower surface side thereof. However, since the lower surfaces of the protrusions 31a2a and 31c2a are inclined surfaces that become narrower toward the upper side, the clamp piece 40 rotates while bending the arm portions 31a2 and 31c2 outward.

Then, as shown in FIG. 14, when the clamp piece 40 rotates to the upper surface of the protrusions 31a2a, 31c2a, the protrusions 31a2a, 31c2a and the clamp piece 40 are separated from each other, and the arm portions 31a2, 31c2 return to their original linear shapes. . In this state, since the upper surfaces of the protrusions 31a2a and 31c2a face the clamp piece 40 in parallel, the clamp piece 40 cannot rotate in the opposite direction. That is, in the present embodiment, the arm portions 31a2, 31c2 and the protrusions 31a2a, 31c2a constitute a turning control piece. Since the gap between the rotary shaft member 32 and the air cleaner case 10 is approximately equal to the thickness of the clamp piece 40, the clamp piece 40 does not rattle even if the rotating end 41 is opened in a U shape. You can rotate with.

By the way, the bifurcated claw-shaped portions 41a, 41a are inserted between the support wall 31a and the support wall 31b and between the support wall 31b and the support wall 31c, respectively, and conversely, the cut between the forks is performed. The support wall 31b is inserted in the notch 41b. As a result, when the clamp piece 40 is rotated to a certain degree, the support wall 31b abuts on the inner side of the notch 41b and cannot rotate any further. Therefore, by allowing the air cleaner cap 20 to rotate as much as necessary for tightening, the tightening end 42 of the clamp piece 40 may get inside the air cleaner case 10 during the assembling work, thereby disturbing the work. Can be prevented. That is, as shown in FIG. 16 and FIG. 17, the rotatable range of the clamp piece 40 changes according to the depth of the notch 41b, and as shown in FIG. The depth of 41b and the height of the support wall 31b are adjusted.

After the clamp piece 40 is assembled to the clamp support portion 30 of the air cleaner case 10 in this manner, the air cleaner cap 20 is covered on the air cleaner case 10 as usual, and the tightening end 42 of the clamp piece 40 is fixed. The air cleaner cap 20 is pressed against the locking protruding wall 21. Then, the curved portion 42a of the tightening end 42 rides over the locking protruding wall 21 and presses and holds the air cleaner cap 20 toward the air cleaner case 10. In the present embodiment, the arm portions 31a2 and 31c2 and the protrusions 31a2a and 31c2a that constitute the rotation restricting portion are formed separately from the support walls 31a and 31c, and the ratchet that has the same function. It can be configured with something like a mechanism.

[Brief description of drawings]

FIG. 1 is a front view of a clamp mechanism according to an embodiment of the present invention as viewed from the outside.

FIG. 2 is a vertical sectional view taken along the line II-II of FIG. 1 in a use state.

FIG. 3 is a perspective view of a clamp piece.

FIG. 4 is a side view of a clamp piece.

FIG. 5 is a rear view of the clamp piece.

FIG. 6 is a top view of a clamp support portion.

7 is a sectional view of the clamp support portion shown in FIG. 8 taken along the line VII-VII.

FIG. 8 is a front view of a clamp support portion.

FIG. 9 is a perspective view of a clamp support portion.

FIG. 10 is a bottom view of the clamp support portion.

FIG. 11 is a perspective view showing a state where the clamp piece is assembled to the clamp support portion.

FIG. 12 is a perspective view showing a state where the clamp piece is assembled to the clamp support portion.

FIG. 13 is a perspective view showing a state where the clamp piece is assembled to the clamp support portion.

FIG. 14 is a perspective view showing a state where the clamp piece is assembled to the clamp support portion.

FIG. 15 is a perspective view showing a state where the clamp piece is assembled to the clamp support portion.

FIG. 16 is a sectional view showing a depth of a notch and a rotatable range of a clamp piece.

FIG. 17 is a cross-sectional view showing the depth of the notch and the rotatable range of the clamp piece.

FIG. 18 is a cross-sectional view showing a rotatable range of a clamp piece.

FIG. 19 is a front view of a conventional clamp mechanism.

FIG. 20 is a cross-sectional view of a conventional clamp mechanism.

FIG. 21 is a front view of another conventional clamp mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Air cleaner case 20 ... Air cleaner cap 21 ... Locking protrusion wall 30 ... Clamp support part 31a-31c ... Support wall 31a2, 31c2 ... Arm part 31a2a, 31c2a ... Protrusion 32 ... Rotating shaft material 40 ... Clamp piece 41 ... Rotation End 42 ... Tightening end

Claims (2)

[Scope of utility model registration request] 1. When fastening a lid that covers the opening of the main body, the lid is formed to have a substantially C-shaped cross section and is rotatably fixed to a rotary shaft of the main body at one rotary end, and the other is fixed. In the clamp mechanism having a clamp piece that presses and holds the pressing end of the lid to the main body side with the tightening end of the lid, the rotating shaft is arranged at a distance of approximately the thickness of the clamp piece from the main body, and The moving end is formed in a U shape in which the end portion is warped outward, and in the vicinity of the rotating shaft, the pressing end is allowed to rotate in the direction of approaching the lid, and in the direction of moving away from the lid. Is a clamp mechanism characterized by comprising a rotation restricting portion for restricting rotation. 2. The clamp mechanism according to claim 1, wherein a notch is formed in the U-shaped rotating end, and the notch is formed in the peripheral surface of the rotating shaft. A clamp mechanism characterized in that a convex piece for restricting a rotation amount is formed.