JPH078991Y2 - Assembling structure of water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a structure for assembling an inner case and a front cover to a back cover when assembling a water heater.

[Conventional technology]

Conventionally, for example, as shown in FIG. 6, the heat exchanger 3 of the inner shell C'is used to assemble the inner shell C'of the internal structure to the rear mounting plate 1'of the back cover A '. The mounting seats 2'of the narrow L-shaped support fitting D'pre-installed by the setscrews 5'on both sides of 'are fixed to the upper corners of the rear mounting plate 1' by the setscrews 10 '. Also, assembling the front cover to the rear mounting plate is not shown, but the mounting flanges provided at several points around the back cover and the front cover are tightened and fixed with setscrews, or the rear mounting plate and the front cover are exclusively hooked. Metal fittings are provided so that the front cover can be hooked and supported on the rear mounting plate.

[Problems to be solved by the device]

In the above-mentioned conventional technique, since the inner body C'is assembled to the rear mounting plate 1'by using the narrow L-shaped support metal fitting D ', particularly, it is mounted on the upper corner of the rear mounting plate 1'. Since the contact area of the mounting seat 2'is small, the rear contact plate 1'is formed of a relatively thin plate body, for example, the contact surface intensively receives an external force when the water heater is packed. In addition to the above, the rear mounting plate 1'in the vicinity of the mounting seat 2'may be deformed into unevenness at the time of packaging or transportation, and it is impossible to absorb heat distortion and assembly error, which is impossible. It had the drawback of being too forceful and lacking in durability. The front cover is attached to the rear mounting plate by means of fixing with a set screw or by hooking and supporting with a special hook metal, but with the set screw, the front cover can be attached to and removed from the back cover. A lot of steps are required, and the hook metal fittings have drawbacks such as an increase in manufacturing cost because special hook metal fittings need to be specially provided on the back cover and the front cover.

The present invention has been made in view of the above problems of the conventional technology, and its purpose is to increase the strength of the upper corner portion of the back mounting plate of the back cover and to improve the heat exchanger portion of the inner case. By using a fixing bracket having four functions of facilitating the support and supporting and hooking the front cover, the inner body and the front cover can be easily and reliably assembled to the back cover. It is intended to provide an attachment structure.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the assembly structure of the water heater according to the present invention has a flat plate-shaped mounting seat that is fixed by abutting against a wide range of an upper corner of the back mounting plate of the back cover.
A support plate having an insertion groove for supporting the inner shell in the heat exchanger part by inserting it into the inverted exposed part of the heat absorption tube arranged in a meandering shape of the heat exchanger, and a support plate for supporting the top plate side part of the front cover, Provided with a fixing bracket made by bending the hooking part that hooks and supports the upper surface side part of the front cover, and the heat exchanger part of the inner case and the upper part of the front cover with respect to the back cover. It is assembled by interposing.

[Action]

In the water heater assembly structure according to the present invention configured as described above, the flat plate mounting seat is closely fixed to a wide range of the upper corner of the back mounting plate of the back cover.
The upper corner of the rear mounting plate is reinforced by the mounting seat to increase its strength, and the rear mounting can be achieved by inserting the inverted exposed part of the heat absorption tube of the heat exchanger into the insertion groove of the support plate that is integrated with the mounting seat. The inner shell can be firmly supported by the heat exchanger part against the plate, and the top cover side part of the front cover can be attached by hooking and supporting the top side part of the front cover with the hook part integrally provided with the mounting seat. Since the support plate is provided integrally with the seat, the front cover can be firmly and stably assembled to the back cover.

〔Example〕

An embodiment of an assembling structure of a water heater according to the present invention will be described below with reference to the drawings.

In FIG. 1 to FIG. 5, A is a back cover, and the back mounting plate 1 has internal structures such as an inner shell C, a burner, and a blinking device, which are functional parts of a water heater, mounted and installed, and its front surface. A front cover B is detachably attached, and the back cover A and the front cover B constitute an outer shell of the water heater. The inner shell C is composed of a combustion chamber 10 and a heat exchanger 3, and is a burner installed in the combustion chamber 10 to heat the heat exchanger 3 to exchange heat with the heat absorbing tube 4 of the heat exchanger 3. The cold water flowing through the inside is heated and raised in temperature. Further, a top plate 11 of the front cover B is provided with an exhaust port 12 for discharging exhaust gas from the heat exchanger 3 to the outside of the device.

D is a fixing bracket, which has the following structure. That is, the endothermic tube arranged in a meandering manner in the heat exchanger 3 of the inner case C on one side of the flat plate-shaped mounting seat 2 which is abutted and fixed to a wide range of the upper corner portion of the back surface mounting plate 1 of the back cover A. 4, a support plate 7 having an insertion groove 6 that is inserted into the inverted exposed portion 5 that can be detoured in a U shape to support the inner case C in the heat exchanger portion.
Is integrally bent, and the receiving plate 8 for supporting the side portion 11a of the top plate 11 of the front cover B is integrally bent and formed on the upper portion of the flat plate-shaped mounting seat 2, and the other side of the flat plate-shaped mounting seat 2 is also formed. A hook-shaped hooking portion 9 which can be engaged with and disengaged from the hooking hole 13a of the hooking piece 13 provided on the upper end side of the front cover B is formed integrally with the receiving plate 8 by bending. In addition, a mounting hole 14 is formed in the flat plate-shaped mounting seat 2, the flat plate-shaped mounting seat 2 is brought into close contact with an upper corner portion of the rear surface mounting plate 1 of the back cover A, and this is mounted on the rear surface mounting plate 1 with a tightening screw 15 or the like. It is mounted and fixed in the corner. Further, the insertion groove 6 of the support plate 7 has a groove width corresponding to the outer diameter of the heat absorption tube 4 as in the embodiment, and the width of the upper piece 6a of the insertion groove 6 is the gap of the inverted exposed portion 5 of the heat absorption tube 4. 5a is fitted to the insertion groove 6, one end of the inverted exposed portion 5 of the endothermic tube 4 is fitted so as not to rattle, and the inverted exposed portion 5 is
Since the upper piece 6a of the insertion groove 6 is inserted into the gap 5a, the double supporting force provides strong and reliable support. Further, the hook holes 13 of the hook pieces 13 provided on the upper end side of the front cover B are provided.
In the case of a, the hook portion 9 can be easily inserted, and when the locking inner end 13b of the hook portion 9 is locked to the hook portion 9, the front cover B is coupled to the back cover A so that the front cover B does not come off unintentionally. . In the figure, 7a and 7b are positioning receiving pieces provided on the upper end and lower end back of the support plate 7, and the upper body and the back of the heat exchanger 3 are brought into contact with these to determine the installation position of the inner case C. I am doing so. Reference numeral 19 denotes a mounting screw hole formed in the upper corner of the back mounting plate 1 of the back cover A.

Therefore, the heat exchanger portion of the inner case C and the upper portion of the front cover B can be easily assembled to the back cover A via the fixing metal fittings D having the above-mentioned configurations.

The joint between the back cover A and the front cover B on both sides has a stepped portion 17 having the rising piece 16 of the back cover A at its inner end.
The engaging edge portion 18 bent inward of the front cover B is joined to the front cover B to prevent water and the like from entering the outer shell.

Explaining the assembly method below in the above configuration,
One of them is the fixing bracket D and the rear mounting plate 1 of the back cover A.
The flat plate-shaped mounting seat 2 is brought into contact with a wide range of the upper corner of the rear mounting plate 1 by inserting the tightening screw 15 or the like into the mounting hole 14.
After tightening by screwing it into the mounting screw hole 19 on the side, and fixing and fixing the left and right fixing brackets D at predetermined positions in the upper corners of the back mounting plate 1 of the back cover A, the inner case C is attached to the heat exchanger 3 thereof. The inverted exposed portion 5 of the endothermic tube 4 of
If it is inserted from below into the insertion groove 6 of the support plate 7 and positioned by the receiving pieces 7a, 7b, the flat plate-shaped mounting seat 2 of the fixing bracket D
Fixing metal fittings to the upper corners of the rear mounting plate 1 for supporting the inner case C in the heat exchanger section with respect to the back cover A while maintaining a state of overlapping and closely adhering to a wide range of the upper corners of the rear mounting plate 1. Another method is to attach and fix D first, and the other one is to insert the insertion groove 6 of the support plate 7 of the fixing bracket D into the heat exchanger 3
After inserting the fixing metal fitting D into the inverted exposed portion 5 of the heat absorption tube 4 at a predetermined position of the heat exchanger portion of the inner case C, the inner case C is attached to the rear mounting plate 1 of the back cover A. The plate-shaped mounting seat 2 of the fixing bracket D is fixed to the upper corner of the mounting bracket 2 with the tightening screw 15 or the like.
There is an assembling method in which it is fixed later, but any method may be used in practice. In addition, in the above assembling method, the fixing bracket D
In the assembling method of first attaching the fixing bracket D after temporarily fixing the fixing bracket D with the tightening screw 15 or the like, the heat exchanger portion of the inner case C is inserted and positioned on the support plate 7, and then the fixing bracket is attached. The D may be fixed by tightening the tightening screw 15 or the like.

Next, as shown in FIG. 4, the front cover B is attached to and detached from the back cover A as shown in FIG.
On the other hand, the hooking pieces 13 provided on both sides of the upper end of the front cover B
When the hooking hole 13a is inserted from the front and pulled down, the locking inner end 13b of the hooking hole 13a is locked by the hooking portion 9 and is engaged and supported so that the front cover B is not separated from the back cover A. At the same time, both sides 11 of the top plate 11 of the front cover B are
The a is supported by the receiving plate 8 of the fixing member D, and the front cover B is supported at a predetermined position with respect to the back cover A together with the engagement support by the hook portion 9. When removing the front cover B from the back cover A,
Can be easily separated by pulling it up to disengage the hook portion 9 and the hook hole 13a and then pulling it toward you.

[Effect of device]

Since this invention has the above-mentioned configuration, it has the following effects.

Since the flat plate-shaped mounting seat of the fixing bracket is closely fixed to a wide range of the upper corner of the back mounting plate of the back cover,
Since the upper corners of the rear mounting plate are strongly reinforced by the mounting seats and their strength is increased, the rear mounting plates near the mounting seats are not deformed when the water heater is packed or transported.

In addition, since the inner shell can be firmly supported in the heat exchanger portion with respect to the rear mounting plate simply by inserting the inverted exposed portion of the heat absorption tube of the heat exchanger into the insertion groove of the support plate provided in the flat mounting seat. Assembling work becomes easy, and due to the expansion of the heat transfer area by the plate-shaped mounting seat, it is possible to quickly dissipate the heat distortion, and it is also possible to absorb the assembly error. The durability is improved.

Further, when both sides of the upper surface of the front cover are freely engaged with and disengaged from the hook portion provided on the plate-like mounting seat, and both sides of the upper surface of the front cover are hooked and supported by the hook portion, the top plate of the front cover is Since both sides are supported by the receiving plate provided on the flat plate-shaped mounting seat, the front cover can be easily attached to and detached from the back cover, and the front cover does not come off from the back cover unintentionally. It can be firmly and stably assembled. Further, since it is not necessary to specially provide a mounting bracket for the front cover, the cost can be reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of an assembly structure of a water heater according to the present invention, FIG. 2 is a perspective view showing a state in which an inner case is attached to a back cover, and FIG. 3 is a back cover. A plan view that can cut a part of the state where the inner body and the front cover are assembled,
FIG. 4 is a side view of the same, FIG. 5 is a front view of a fixing member, and FIG. 6 is a perspective view of a state in which an inner case is assembled to a back cover of a conventional example. A: back cover, 1 ... rear mounting plate, 2 ... mounting seat, 3 ... heat exchanger, 4 ... heat absorption tube, 5 ... inverted exposed portion, C ... inner shell, 6 ... insertion groove , 7 ... Support plate, B ...
Front cover, 8 ... receiving plate, 9 ... hooking part, D ... fixing metal fitting.

Claims (1)

[Scope of utility model registration request] 1. A meandering shape of a heat exchanger (3) on a flat plate-shaped mounting seat (2) which is fixed by abutting against a wide range of an upper corner of a rear mounting plate (1) of a back cover (A). Support plate (7) provided with an insertion groove (6) for supporting the inner case (C) in the heat exchanger section by inserting it into the inverted exposed part (5) of the heat absorption tube (4) arranged in the front cover (B). ) Is provided with a receiving plate (8) for supporting the top plate side part and a hooking part (9) for hooking and supporting the upper surface side part of the front cover (B) integrally provided with a fixing metal fitting (D), The heat exchanger part of the inner case (C) and the upper part of the front cover (B) with respect to the back cover (A) are assembled by interposing the fixing brackets (D) of left-right handedness. Assembly structure for vessels.