JPH0734290Y2 - Outer cover on combustor - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer cover of a combustor such as a small water heater.

[0002]

2. Description of the Related Art The outer cover of a combustor such as a small water heater comprises a rear cover that covers the back surface of the components built into the combustor such as a burner and a heat exchanger, and a front cover that covers the front surface and side surfaces thereof. The rear cover is attached to the back surface of the combustor, and the front cover is fitted to the rear cover from the front side to be connected to each other.

The structure for connecting the front and rear covers to each other is, for example, as shown in FIGS. 6 and 7, a rear cover a.
The pair of slits e provided on the upper edge of the front cover b are engaged with the pair of downwardly extending hooks c provided on both sides of the upper end of the front cover b, and the front cover b is swung about the engaging portions. Cover the inner surface of the side plate b1 of the front cover b so as to contact the outer surface of the bent portion a1 of the rear cover a, and the tightening margin d formed by bending the lower end of the side plate b1 inward and the bottom plate a2 of the rear cover a. The polymerized parts of are screwed to each other.

[0004]

[Problems to be Solved by the Invention]
The position of the front cover in the front-rear direction is determined by the engagement of the hook piece and the slit at the upper end, but on the lower side, the screw for fixing the front and rear covers to each other and the tightening allowance because the screw is inserted. It will be decided by the contact with the peripheral edge of the hole drilled in. However, since the hole must be made larger than the outer diameter of the screw to some extent, the front and rear positions of the front cover cannot be accurately determined, and the appearance is impaired.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an outer cover in which the front cover is joined to the rear cover and the front and rear positions of the front cover can be accurately determined when covering the combustor.

[0006]

In order to achieve the above object, the present invention provides a rear cover having a back plate for covering the back surface of a burner and other combustor parts and a bottom plate projecting forward from the lower end thereof. An outer cover which comprises a front plate for covering the front surface of the component and a front cover provided with both side plates extending rearward from both sides of the front plate, and the tightening margin formed by bending the lower end of the side plate inward is overlapped with the bottom plate and screwed. In the cover, the front end edge of a bent portion formed by bending both sides of the back plate of the rear cover forward is bent in the lateral direction to form a planar contact portion and a hook piece at the upper end portion thereof. A rear end edge of the plate is laterally bent to form a planar contact portion and a rib formed by bending the front end edge of the plate rearward, and a locking edge is formed at the upper end of the corresponding contact portion. Engage one piece with the locking edge and bring both abutting parts into contact with each other. Characterized in that abut the side face of the rib to the side edges of the contact portion of the rear cover side.

[0007]

When the front cover and the front cover are fitted to each other, the front and rear directions can be positioned by abutting the end edges of the rear cover and the side plates of the front cover. Since they have only the width of the plate, they cannot be abutted against each other even with a slight deviation. Therefore, the end edges of the both are bent laterally to provide a planar contact portion, and the both contact portions are abutted to each other to reliably perform the positioning in the front-rear direction. Incidentally, providing the locking edge for engaging the rear cover hook pieces in abutment of the front cover.

[0008]

Embodiments of the present invention will now be described with reference to the drawings.

In FIGS. 1 and 2, (1) is a back plate (1a) and a bottom plate (1b) protruding forward from the lower end thereof.
A rear cover having a front plate (2a) and both side plates (2b) (2) attached to the back surface of a combustor (not shown).
The front cover (2) provided with b) is combined with the rear cover (1) to form an outer cover that covers the outer periphery of the combustor.

Explaining this in detail, the back plate (1a) of the rear cover (1) is formed with a bent portion (1a1) in which both side edges are bent forward, and the bent portion (1a) is further formed.
The front end edge of 1) is bent outward in the lateral direction to form a planar contact portion (1a2). And the relevant contact (1a2)
The upper end of the bent part (1a1) was left unbent, and a hook piece (3) extending forward from the upper end of the bent part (1a1) was formed in this left part. On the other hand, both side plates (2b) (2b) of the front cover (2)
Formed a planar contact portion (2b2) by bending its rear edge inward in the lateral direction, and further bending the end edge of the corresponding contact portion (2b2) backward to form a rib (2b1). The upper portion of the cut inner half portion over a rib (2b1), the hook piece (3) and notch for engagement (4) to form locking the lower edge of the contact portion (2b2) It was a connection Further, the front cover (2) has a tightening margin (5) formed by bending the lower end edges of both side plates (2b) (2b) inward, and the tightening margin (5) is the rear cover (1). ) Is screwed to the bottom plate (1b) in a state of being superposed on the lower surface of the bottom plate (1b).

In the above structure, a method of assembling the rear cover (1) to the front cover (2) will be described. First, the rear cover (1) is fixed to a wall surface or the like, and the hook piece of the rear cover (1) is fixed. (3) Notches (4) (4) in front cover (2) in (3)
After the lower edge of the hook is shallowly engaged, as shown in FIG. 3, the front cover (2) is slightly swung with its engaging portion as a fulcrum, and is lifted upward so that the hook piece (3) (3) is lifted. Notches (4)
(4) While deeply engaging the lower edge of the front cover (2), the tightening margin (5) of the front cover (2) is brought into contact with the lower surface of the bottom plate (1b) of the rear cover (1), and then the front cover (2). Is attached to the bottom plate (1b) with a screw in the tightening margin (5), and the assembling work is completed.

In the assembled state, the rear cover (1) and the front cover (2) are in contact with each other (1a2).
(2b2) is abutted and positioned in the front-rear direction, and the bent portions (1a1) (1a1) of the rear cover (1)
The inner surface of the front cover and the outer surfaces of the ribs (2b1) and (2b1) of the front cover (2) contact each other, and the front cover (2) is laterally positioned with respect to the rear cover (1). Can be done easily and reliably.

In the above embodiment, the hook (3) of the rear cover (1) is provided with a taper portion (3a) so that the front cover (2) is easily locked to the lower edge of the notch (4). Along with
The distance X between the hook piece (3) and the front end edge of the bent portion (1a1) of the rear cover (1) is made as small as possible so that the rear cover (1) and the front cover (2) can be assembled at the completion of the assembling. I tried to prevent rattling between.

[0014]

[Effects of the Invention] Since the planar contact portions are provided on the edges of the side plates of the front and rear covers, when the front cover is fitted to the rear cover,
Even if the front cover and the rear cover are slightly deviated from each other, the contact portions can be reliably brought into contact with each other, whereby the position of the front cover in the front-rear direction can be accurately determined. Moreover, lateral positioning can be performed by bringing the side surface of the rib into contact with the side edge of the contact portion of the rear cover. Further, since the engaging edge is provided at the contact portion, it is not necessary to separately provide a surface perpendicular to the hook piece and provide the engaging edge there.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention.

[Figure 2] Enlarged view of the main part

FIG. 3 is an explanatory diagram for explaining the assembling work.

FIG. 4 is a front view of a main part of the embodiment shown in FIG.

5 is a plan view of a main part of the embodiment of FIG.

FIG. 6 is an explanatory diagram for explaining the inconvenience of the conventional example.

FIG. 7 is an exploded perspective view of a conventional example.

[Explanation of symbols]

 1 Rear cover 1a Rear plate 1b Bottom plate 2 Front cover 2a Front plate 2b Side plate 3 Hook piece 5 Tightening allowance

Claims (1)

[Scope of utility model registration request] 1. A rear cover provided with a back plate that covers the back of burner and other combustor parts, and a bottom plate that projects forward from the lower end thereof, a front plate that covers the front of the part, and extends rearward from both sides thereof. It consists of a front cover with both side plates,
In the outer cover where the tightening margin formed by bending the lower end of the side plate inward is overlapped with the bottom plate and screwed, the front end edge of the bent portion formed by bending both sides of the rear plate of the rear cover forward is laterally A rib is formed by bending to form a planar contact portion and a hook piece at its upper end portion, and laterally bending the rear end edges of the both side plates to bend the planar contact portion and its leading edge backward. And a locking edge is formed at the upper end of the corresponding contact portion, the hook piece and the locking edge are engaged with each other at the time of screwing, and both contacting portions are brought into contact with each other, and the side surface of the rib is rearward. An outer cover in a combustor, which is brought into contact with a side edge of a cover-side contact portion.