JPH0754599Y2 - Clamp structure of air cleaner - Google Patents

Description

[Detailed Description of the Invention] << Industrial Application Field >> The present invention relates to a clamp structure of a hook detachable air cleaner.

<Prior Art> The clamp structure for locking the cover of the air cleaner in the closed state is one in which one end of a hook made of a wire-working spring is rotatably rotatably supported on a clamp stand protruding from the outside of the case. The structure is generally such that the hook lever is moved in the locking direction with the tip of the hook in contact with the edge of the cover to apply a spring force to the hook to press the cover into the case. 2 to 4 are provided at equal intervals around the circumference.

The structure for pivotally supporting this hook on the clamp base is
As shown in the figure, the shaft ends of the hook 1 are bent inward (or may be outside) in advance, and the two ends of the hook 1 are separated by applying force to both sides of the hook 1 to separate them from each other. In this state, the bent ends 1a are positioned in the shaft holes 2a formed in the pair of clamp bases 2 and the hook 1 is elastically recovered by releasing the hand so that the hooks 1 are automatically inserted into the shaft holes 2a. Has become.

<Problems to be solved by the invention> However, in this structure, since the hook 1 has to be manually attached, a force is required for the attachment work itself, and the troublesome work contents such as positioning and adjustment of the force at the time of expansion are required. Was included.

Therefore, an object of the present invention is to provide a clamp structure of an air cleaner in which the shaft portion of the hook can be attached to the shaft hole with one touch.

<Means for Solving the Problems> In order to achieve the above-mentioned object, the present invention provides a case in which a filter element is housed, a cover for covering the opening of the case, and a plurality of locks for locking the cover in a closed state. Each of the clamp tools is provided with a clamp base projectingly provided on the outer periphery of the case, and one end thereof is rotatably supported by a shaft hole formed in the clamp base, and the other end is It is composed of a hook that is clamped in a closed state by being locked to the cover, and a notch is formed between the shaft hole and the outer side of the clamp base so that a guide slit that tapers outwardly is formed. It is formed so that the shaft portion of the hook is press-fitted into the shaft hole through the guide slit.

The guide slit is formed to extend laterally from the shaft hole,
A stopper block may be provided below the clamp table.

<Operation> According to the above configuration, when the shaft portion of the hook is press-fitted into the guide slit, the shaft portion is elastically mounted inside the shaft hole through the guide slit, and is retained in that state.

<< Embodiment >> An embodiment of the present invention will be described in detail below with reference to the drawings.

1 (a), (b) and FIG. 2 show a first embodiment of the present invention.

In the figure, 10 is a synthetic resin case, 12 is a cover that covers the upper surface opening of the case 10, and the filter installed inside is locked by a plurality of clamps pivotally supported on the periphery of the case 10 and is closed. Fix the element 14.

Each of the clamp tools has a clamp base 16 composed of a plurality of rib-shaped protrusions integrally formed to be projected on the outer periphery of the upper part of the case 10 at intervals in the circumferential direction, and a hook 18 locked to each clamp base.
It consists of and.

A shaft hole 20 is formed in the center of each of the clamp bases 16, and a tapered guide slit 22 is formed in the lower portion of the shaft base 20 so as to expand downward toward the clamp base 16. Has been done.

The narrow portion 22a, which is the connecting end of the guide slit 22 with the shaft hole 20, is set to be smaller than the outer diameter of the shaft portion of the hook 18, which will be described later.

The hook 18 is composed of a wire-working spring, and has a spring portion 24 formed by processing the wire into a curved shape of a substantially U shape when viewed from the front and a substantially C shape when viewed from the side, and the same diameter assembled to the spring portion 24. And a hook lever 26 made of a wire spring.

A portion connecting the both sides of the U-shaped center of the spring portion 24 is formed in a straight line, and this portion is used as the shaft portion 24a, and both ends of the spring portion 24 on the opposite side are bent inward to each other to form a support shaft 24b. I am trying.

The hook lever 26 is formed by forming a loop-shaped fulcrum part 26a by winding both sides of the central part, and forming a lever part 26b and an abutting part 26c on both sides of the fulcrum part 26a.
The spring portion 24 is assembled by rotatably supporting the shaft 26a on the support shaft 24b.

In the above configuration, the hook 18 is mounted in the shaft hole 20 of the clamp base 16 with the cover 12 set on the opening surface of the case 10.

Then, as shown in FIG. 1 (a), the shaft portion 24 a of the spring portion 24 is made to face the lower opening end of each of the guide slits 22, and the contact portion 26 c of the hook lever 26 is attached to the cover 12. By hitting the groove 12a formed in the upper surface edge portion and rotating the lever portion 26c upward as shown by the arrow in the figure, the shaft portion 24a is pulled up with a strong force by the lever action, and the guide slit 22 is moved. While being expanded, it is transmitted and fitted into the shaft hole 20.

Then, as shown in FIG. 1 (b), the shaft portion 24a is completely fitted into the shaft hole 20, and at the same time, the narrow portion 22a elastically recovers to the original opening dimension, and the shaft portion 24 falls off. Prevent.
In this state, the hook 18 can rotate around the shaft hole 20 as a fulcrum.

Further, if the lever portion 26c is further rotated in the locking direction, the spring fulcrum of the spring portion 24 is displaced in the direction in which the hook lever 26 is held in the upper position while the C-shaped shape of the spring portion 24 is extended. The cover 12 is locked in the closed position according to the force.

3 shows a case where the hook 18 is turned upside down, and the abutting portion 26c of the hook lever 26 is slit 2.
Apply to the lower open end of 2 and cover the shaft part 24a of the spring part 24.
When the lever portion 26b is rotated downward while being in contact with the groove portion 12a of 12 in the direction opposite to that shown by the arrow in the figure, the contact portion 26c is repelled inside the shaft hole 20 through the slit 22. Is fitted to. In this way, the clamping action is the same as described above even if it is upside down.

Further, this reverse mounting structure is convenient when there is an obstacle on the upper part of the cover 12 and the hook lever 26 cannot be operated from the upper part of the cover 12.

FIG. 4 shows a second embodiment of this invention.

In this embodiment, common parts to those of the first embodiment will be designated by common reference numerals, and only newly added parts will be designated by different reference numerals.

In this embodiment, the slit 22 extends from the shaft hole 20 to the clamp base.
A notch is formed horizontally toward the side of 16, and the shaft portion 24a of the spring 24 is fitted into the shaft hole 20 from the side through the slit 22.

In addition, a stopper block 30 is formed so as to project from the side of the case 10 in the lower part of the clamp base 16, and the lower end of the spring portion 24 abuts on this stopper block 30 so that the hook
The downward rotation of 18 is restricted.

That is, when the slit 22 is horizontally cut out and the stopper block 30 is not provided, when the spring portion 24 is released, the lower end of the spring portion 24 contacts the side surface of the case 10 as shown by an imaginary line in the figure. Orients horizontally to case 10 in contact.

At this horizontal position, a downward external force is easily applied to the spring portion 24 due to carelessness or the like.

For example, when a falling object collides with the spring portion 24 in this state, an external force F that pushes the spring portion 24 further downward is applied, and as shown by an imaginary line arrow in the figure with respect to the shaft portion 24a as the point of action,
The force is F _{1 in the} direction of pushing outward obliquely.

This may cause the shaft portion 24a to be pulled out from the shaft hole 20.

On the other hand, by providing the stopper block 30, the opening angle of the hook 18 is restricted, and the probability that a downward external force is applied is reduced. Even if an external force F is applied, this force F is a force that pushes the shaft portion 24a as the point of action toward the upper inside of the shaft hole 20 with the lower end of the spring portion 24 as the fulcrum, as shown by the arrow in the figure. It becomes F ₂ and cannot get out of the slit 22.

<Effect of Device> As described in detail in each of the above embodiments, in the clamp structure of the air cleaner according to the present invention, the shaft portion of the hook is press-fitted into the guide slit so that the shaft portion of the shaft hole is inserted through the guide slit. Since it is elastically mounted inside and is retained in that state, there is no troublesome positioning of the shaft part with respect to the shaft hole and there is no deformation of the hook, simplifying the assembly work of the hook to the air cleaner. I can.

In particular, when the slit is formed downward as shown in the first embodiment, the work can be further simplified because the assembly can be completed with one touch at the same time when the hook is clamped to the cover.

[Brief description of drawings]

1 (a) and 1 (b) are partial side views showing a clamp structure according to a first embodiment of the present invention, FIG. 2 is an exploded perspective view of a main part, and FIG. 3 is an example in which hooks are assembled in the opposite direction. FIG. 4 is a partial side view of the second embodiment, and FIG. 5 is an exploded perspective view of a conventional clamp structure. 10 …… case, 12 …… cover 14 …… filter element 16 …… clamp base, 18 …… hook 20 …… shaft hole, 22 …… guide slit 24 …… spring part, 24a …… shaft part 24b …… support Shaft, 26 …… Hook lever 26a …… Shaft hole, 26b …… Lever part 26c …… Abutting part, 30 …… Stopper block

Claims (2)

[Scope of utility model registration request] 1. A case containing a filter element,
A cover for covering the opening of the case and a plurality of clamp tools for locking the cover in the closed state are provided, and each clamp tool is provided with a clamp base projecting on the outer periphery of the case and the clamp base. One end is rotatably supported in the formed shaft hole, and the other end is a hook that is clamped in the closed state by being locked to the cover, and the outside of the shaft hole and the clamp base. A guide slit that expands outward in a tapered shape is formed in a notch between the first and second portions, and the shaft portion of the hook is press-fitted into the shaft hole through the guide slit. Clamp structure for air cleaner. 2. The clamp structure for an air cleaner according to claim 1, wherein the guide slit is formed laterally from the shaft hole, and a stopper block is provided below the clamp base.