JP2017146079A - Hot water storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water storage device having low cost case legs.SOLUTION: A full length of a blank member 32 shown in Fig.[a] is L1. A protruding length of a receiving part 31 of the blank member 32 becomes substantially a half of width of a deep wall 31. A length of combined deep wall 101 and a receiving part 105 of a substantial regular square shown in Fig.[b] is L2. The receiving part 105 is similar to a regular square with a width of the deep wall 101. Accordingly, the length L2 becomes longer than the length L1 only by ΔL. The value of ΔL becomes about a half of the widths of deep walls 41, 101. As compared with a cut plate 107 in an example of comparison, the blank member 32 of this invention becomes small in size and its material yield is improved. Since material cost can be reduced, the case legs are provided at low cost.SELECTED DRAWING: Figure 12

Description

  The present invention relates to a hot water storage device in which a hot water storage tank is housed in a housing.

  Various hot water storage apparatuses having a hot water storage tank stored in a housing have been proposed (see, for example, Patent Document 1 (FIG. 3)).

FIG. 3 of Patent Document 1 shows the bottom panel (16) of the housing (the numbers in parentheses indicate the symbols described in Patent Document 1. The same applies hereinafter), and the legs (17) that support the bottom panel (16). And a joint member (24) mounted on the bottom panel (16).
The joint member (24) is connected to the leg member (17) by bolts and nuts.

  The leg member (17) is provided with flange-shaped horizontal surfaces (21a, 21b) projecting outward from the standing member (20) at the upper portion thereof, and through holes (28 for passing bolts to these horizontal surfaces (21a, 21b), respectively. 28).

  Since the horizontal planes (21a, 21b) project outward, the horizontal plate (26) which is the base of the joint member (24) inevitably becomes large, and the material cost for the horizontal plate (26) increases.

  The positions of the through holes (27, 27) provided in the horizontal plate (26) are determined by the lower through holes (28, 28), and the pitch of the through holes (28, 28) is large. The pitch of 27) is also increased. When an upward force is applied to the joint member (24) due to an earthquake or the like, the horizontal plate (26) may be deformed so as to protrude upward with the pair of through holes (27, 27) as fulcrums. As a countermeasure, deformation is suppressed by increasing the thickness of the horizontal plate (26). However, if the thickness is increased, the horizontal plate (26) becomes heavier and the material cost increases.

Accordingly, a structure for reducing the size of the horizontal plate (26) has been proposed (see, for example, Patent Document 2 (FIGS. 7 and 8)).
Patent document 2 is demonstrated based on the following figure.
FIG. 15A is a development view of a conventional leg member. From the strip to the back wall 101, the left wall 102, the right wall 103, the leg bottom 104, the substantially square receiving part 105, and the receiving part 105 from left to right. A cutting plate 107 composed of the protruding ear pieces 106 and 106 is cut out.

Then, the cut plate 107 is bent.
In FIG. 15B, the leg bottom 104 is connected to the left wall 102 and the right wall 103 by spot welding or the like, and the ear pieces 106 and 106 are connected to the left wall 102 and the right wall 103 by spot welding or the like. As described above, since the obtained leg member 100 has the back wall 101, the rigidity becomes high.

  In addition, the leg member 100 has a sufficiently small receiving portion 105, and the pitch P of the through holes 108 provided therein is also sufficiently small. Since the pitch P is small, the occurrence of local deformation in the receiving portion 105 can be suppressed.

However, when attention is paid to the receiving portion 105, it is essential to connect the ear pieces 106, 106 to the left wall 102 and the right wall 103 by spot welding or the like, which increases the manufacturing cost.
While there is a demand for cost reduction of a hot water storage device, it is required to provide a low cost leg member 100.

JP 2014-29231 A JP 2011-12896 A

  An object of the present invention is to provide a hot water storage device including a low-cost housing leg.

The invention according to claim 1 is a hot water storage tank provided with tank legs for storing hot water, a housing for storing the hot water storage tank, and a housing that extends downward from a bottom plate of the housing and supports the housing and the hot water storage tank. In a hot water storage device comprising a body leg and a connecting bolt for connecting the housing leg and the tank leg,
The tank leg has a bottom portion that rests on a bottom plate of the housing, and the bottom portion includes a plurality of bolt holes through which the connection bolts are passed,
The bottom plate of the housing has a housing-side through-hole through which the connection bolt passes.
The housing leg is in contact with the lower surface of the bottom plate of the housing and has a leg-side through hole through which the connecting bolt is passed, a leg pillar part extending downward from the receptacle part, and a lower part of the leg pillar part And a leg bottom portion that comes into contact with the installation surface,
The said receiving part consists of at least 2 piece connected with the said pedestal part via a fold line.

  In the invention according to claim 2, the housing leg has a plate inserted below the receiving portion, and the plate is thicker than the thickness of the receiving portion, and a plurality of female screw portions into which the connecting bolt can be screwed. It is characterized by having.

  In the invention according to claim 3, the pedestal portion is composed of left and right side walls and a back wall that connects these back ends so that the plate can be taken in and out, and the receiving portion is attached to the left side wall via a folding line. It consists of the left piece connected and the right piece connected to the right side wall through a fold line.

  In the invention according to claim 4, the pedestal portion is composed of left and right side walls and a back wall connecting these back ends so that the plate can be taken in and out, and the receiving part is attached to the left side wall via a folding line. It consists of the left piece connected, the right piece connected to the right side wall through the fold line, and the center piece connected to the back wall through the fold line.

  The invention according to claim 5 is characterized in that a receiving projection for temporarily receiving the plate is provided on the side wall.

  The invention according to claim 6 is characterized in that the pedestal portion has a bent portion bent inward at the tip end portion of the side plate, and the plate is temporarily received even at the upper end of the bent portion.

  In the invention which concerns on Claim 7, the stopper which prescribes | regulates the insertion distance of a plate was provided in the receiving part or the back wall, It is characterized by the above-mentioned.

In the invention according to claim 1, at least two pieces constituting the receiving portion are merely bent, and there is no need to spot weld to nearby members (such as side walls). Therefore, the manufacturing cost required for spot welding or the like can be reduced.
Therefore, according to the present invention, a hot water storage device including a low-cost housing leg is provided.

  In the invention according to claim 2, the housing leg has a plate inserted below the receiving portion, and the plate is thicker than the thickness of the receiving portion, and a plurality of female screws into which the connecting bolt can be screwed. Has a part. Since the receiving portion can be reinforced with the plate, the receiving portion can be made thin. Since the plate is a substitute for the nut, it does not lead to an increase in cost.

In the invention which concerns on Claim 3, a receiving part consists of the left piece connected to the left side wall via the fold line, and the right piece connected to the right side wall via the fold line.
The receiving portion 105 described with reference to FIG. 15A is a quadrilateral plate composed of sides having the same length as the width of the back wall 101, and the cut plate 107 is necessarily enlarged.
In this regard, the protruding lengths of the left and right pieces of the present invention are each about half the width of the back wall. As a result, the cut plate is reduced and the material yield is improved.

In the invention according to claim 4, the receiving portion includes a left piece connected to the left side wall via a fold line, a right piece connected to the right side wall via a fold line, and a back side connected to the right side wall via the fold line. It consists of a central piece connected to the wall. The protruding lengths of the left and right pieces are each about half the width of the back wall, and the protruding length of the center piece is about half the width of the side wall. As a result, the cut plate is reduced and the material yield is improved.
In addition, since the left and right pieces are connected to the left and right side walls respectively, and the central piece is connected to the back wall, the force applied to the receiving part can be transmitted well to the pedestal that consists of the left and right side walls and the back wall. It can be said that the structure is preferable in terms of strength.

  In the invention which concerns on Claim 5, a plate can be temporarily received by the receiving protrusion provided in the side wall. That is, it is not necessary to lift the plate by hand before screwing the connecting bolt, and the assembling work is facilitated.

  In the invention according to claim 6, the pedestal column portion has a bent portion bent inward at the tip end portion of the side plate, and the plate is temporarily received even at the upper end of the bent portion. According to the fourth aspect of the present invention, a total of four receiving protrusions are required on the left and right and front and rear. According to the fifth aspect, since two pieces are entrusted to the bent portion, only two receiving projections are required. The bent portion plays a role of increasing the rigidity of the pedestal portion.

  In the invention which concerns on Claim 7, the stopper which prescribes | regulates the insertion distance of a plate was provided in the receiving part or the back wall. The plate cannot be inserted excessively for the convenience of placing on the bend. It is because a plate will remove | deviate from a bending part if it inserts excessively. According to the present invention, since the insertion operation is completed when the plate hits the stopper, the assembly operation is facilitated. There is no worry about the plate coming off the bent part.

It is sectional drawing of the hot water storage apparatus which concerns on this invention. FIG. 2 is an enlarged view of part 2 of FIG. It is an expanded view of a housing leg. It is a top view of a case leg. It is a front view of a housing leg. It is the top view and sectional drawing of a square plate as a plate. It is an effect | action figure of a receiving protrusion. It is a figure explaining A type housing leg. It is a figure explaining a B type case leg. It is a figure explaining arrangement of a case leg. It is a figure explaining the effect | action of a plate. It is a figure explaining a material yield. It is a figure explaining the example of a change of a receiving part. It is a figure explaining the example of a change of the principal part of a hot water storage apparatus. It is the expanded view and perspective view of the conventional housing leg.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.

  As shown in FIG. 1, a hot water storage device 10 includes a vertically long hot water storage tank 12 having tank legs 11, a housing 13 that houses the hot water storage tank 12, and a bottom plate 14 of the housing 13 that extends downward. 13 and a housing leg 30 that supports the hot water storage tank 12, and a connecting bolt 16 that connects the housing leg 30 and the tank leg 11. Water can be supplied to the hot water storage tank 12 through the water supply pipe 17, and hot water can be taken out from the hot water storage tank 12 through the hot water discharge pipe 18.

  As shown in FIG. 2, the bottom portion 19 of the tank leg 11 is placed on the bottom plate 14 of the housing 13. Further, the bottom plate 14 of the housing 13 is placed on a receiving portion 31 that constitutes an upper portion of the housing leg 30. A square plate 50 as a plate is inserted under the receiving portion 31. The square plate 50 as a plate has a female screw portion 55. For example, the thickness of the receiving portion 31 is 2 to 3 mm, the thickness of the square plate 50 is 4 to 5 mm, and the square plate 50 is much thicker than the receiving portion 31. That is, the receiving portion 31 is much thinner than the square plate 50.

The bottom plate 14 of the housing 13 is provided with a housing-side through hole 15.
The connecting bolt 16 passes through one of the first to third bolt holes 22 to 24 provided in the bottom portion 19 of the tank leg 11 from the top downward, and the housing side through hole 15 and the leg side through hole 34 therebelow. And is screwed into the female screw portion 55.
As a result, the housing leg 30 and the tank leg 11 are connected with the bottom plate 14 interposed therebetween.

Hereinafter, the case leg 30 and the tank leg 11 will be described in detail.
As shown in FIG. 3A, the main part of the housing leg 30 is formed by punching from the blank material 32.
The receiving portion 31 is formed above a laterally extending valley fold line (a line that folds so that the line becomes a valley bottom) 33. The receiving portion 31 includes a central piece 31a, a left piece 31b, and a right piece 31c. A leg-side through hole 34 is punched and formed in each of the central piece 31a, the left piece 31b, and the right piece 31c. The leg side through hole 34 is a long hole. And the receiving part 31 is bend | folded by the trough fold line 33 to the drawing front side.

  A pillar portion 35 is formed below the valley fold line 33 extending laterally. The pedestal portion 35 is folded at valley fold lines 36, 37, 38, 39 extending vertically. The valley fold line 37 and the valley fold line 38 form a back wall 41, and the valley fold line 36 and the valley fold line 37 form a left side wall 42L (L is a subscript indicating the left; the same applies hereinafter). The fold line 36 forms a left bent portion 43L, and the valley fold line 38 and the valley fold line 39 form a right side wall 42R (R is a subscript indicating the right; the same applies hereinafter). A right bent portion 43R is formed.

Preferably, receiving projections 44, 44 are formed on the left and right side walls 42L, 42R.
As shown in FIG. 3B, the receiving projection 44 is a dowel formed by a punch and a die. However, the receiving projection 44 may be a short pin welded or screwed to the side walls 42L, 42R.

More preferably, a stopper 45 is provided on the central piece 31a.
As shown in FIG. 3C, the stopper 45 is a dowel formed by a punch and a die. However, the stopper 45 may weld or screw a short pin to the center piece 31a.
Dowels can save the work of preparing and joining short pins. The number of parts can be reduced, and there is no need to lose parts (pins). The stopper 45 may be provided on the back wall 41.

As shown in FIG. 4, the bent columnar pedestal portion 35 is integrally provided with a receiving portion 31 including a central piece 31 a, a left piece 31 b, and a right piece 31 c. The receiving portion 31 has three leg side through holes 34.
The leg bottom part 46 extended along the side walls 42L and 42R is attached to such a leg pillar part 35.

As shown in FIG. 5, the leg bottom 46 is a member placed on the installation surface 47. The leg bottom portion 46 bent into a U-shape is fitted to the lower portion of the rectangular column-shaped leg pillar portion 35, and thereafter, the leg bottom portion 46 and the leg pillar portion 35 are connected by spot welding or caulking. Integrated. This connection method may be rivets or bolts and nuts, and is optional.
The central piece (FIG. 4, reference numeral 31a) has a stopper 45 extending downward, and receiving projections 44, 44 projecting horizontally on the side walls 42L, 42R. The upper end level of the receiving projection 44 is set to be the same as the upper end level of the bent portions 43L and 43R.

As shown in FIG. 6A, the square plate 50 is a plate composed of four sides 51, 52, 53, 54 that are equal in length and orthogonal to each other. The square plate 50 has three female screw portions 55 into which the connecting bolt 16 can be screwed. The three female screw portions 55, 55, 55 are arranged at the vertices of an equilateral triangle.
For convenience, a line passing through the midpoint of the sides 51 and 53 and passing through one female screw portion 55 is referred to as a plate center line 56.

Preferably, dowels 57, 57, 57 for preventing erroneous insertion are provided in the vacant site.
Note that the center position of the square plate 50 and the center position of the equilateral triangle formed by the three female screw portions 55, 55, 55 substantially overlap each other. As will be described in detail later, since the center positions overlap, the same center position can be obtained regardless of whether the square plate 50 is inserted in the front direction or in the horizontal direction, so the first to first tank legs (FIG. 10, reference numeral 11). It overlaps with the center position of the equilateral triangle formed by the third bolt holes (FIG. 10, reference numerals 22 to 24), and the tank legs 11 can be shared.

FIG. 6B is a cross-sectional view taken along line bb of FIG.
In FIG. 6B, the female thread portion 55 is threaded from the top to the bottom, and a burr 55b that inevitably projects downward from the lower surface remains. A deburring process for removing the burr 55b is desired. However, if the burr 55b is light, the deburring process may be omitted. In this case, the burr 55b remains.

  The dowels 57, 57, 57 are provided so as to protrude toward the burr 55b, and are formed of, for example, a punch and a die. The dowel 57 may be a small piece welded to the lower surface of the square plate 50, and the method for forming the dowel 57 is arbitrary.

The procedure for inserting the square plate 50 will be described with reference to FIG.
In FIG. 7A, the distance D <b> 1 between the receiving portion 31 and the receiving protrusion 44 is slightly larger than the plate thickness T of the square plate 50. The interval D2 between the receiving portion 31 and the bent portion 43R is substantially the same as the interval D1, and is slightly larger than the plate thickness T of the square plate 50.

  In the square plate 50 shown in FIG. 7B, a dowel 57 for preventing erroneous insertion faces downward, and the square plate 50 has an arrow (1) (correctly, the arrow extends from the front of the drawing to the back). In this way, the distances D1 and D2 can be inserted. A circle is attached to the arrow. Since the burr 55b exists on the lower surface, there is no actual harm.

On the other hand, in the square plate 50 shown in FIG. 7C, a dowel 57 for preventing erroneous insertion faces upward, and the burr 55b exists on the upper surface. If the square plate 50 is applied to the receiving portion 31 in this direction, the burr 55b bites and the square plate 50 does not adhere to the receiving portion 31.
However, in this embodiment, a dowel 57 for preventing erroneous insertion is provided, and the square plate 50 can be inserted because the dowel 57 hits the receiving portion 31 when attempting to insert as shown by the arrow (2). Can not. Therefore, the erroneous insertion of the square plate 50 is prevented, and as a result, the square plate 50 can be securely adhered to the receiving portion 31.

  One dowel 57 may be provided, but three are provided in this example. In the state where the dowels 57 are directed upward, in FIG. 6A, when attempting to insert with the side 51 as the head, the dowels 57 and 57 near the side 51 hit the receiving portion 31. When the side 52 is to be inserted, the dowel 57 near the side 52 hits the receiving portion 31. When the side 53 is to be inserted, the dowel 57 near the side 53 hits the receiving portion 31. When the side 54 is to be inserted, a dowel 57 near the side 54 hits the receiving portion 31. That is, the square plate 50 is only slightly inserted. Since it is hardly inserted, erroneous insertion is reliably prevented.

In the square plate 50 oriented in FIG. 7B, there are two types of insertion forms. These forms will be described with reference to FIGS. 8 and 9, respectively.
As shown in FIG. 8A, the distance D3 from the outer surface of the bent portions 43L and 43R to the stopper 45 is set to be approximately the same as the length of the side 52 of the square plate 50.
The square plate 50 is inserted so that the plate center line 56 of the square plate 50 is parallel to the side walls 42L and 42R and the side 51 is the head. During this insertion, the left and right bent portions 43L and 43R may be slid and the left and right receiving projections 44 and 44 may be slid from the middle. When the side 51 hits the stopper 45, the insertion work is finished. Since the square plate 50 is supported at four places (the left and right bent portions 43L and 43R and the left and right receiving projections 44 and 44), there is no fear of dropping.

  As shown in FIG. 8B, the internal thread portions 55, 55, 55 can be seen through the leg-side through holes 34, 34, 34. The form of FIG. 8B in which the side 51 approaches the back wall 41 and the plate center line 56 is parallel to the side walls 42L and 42R is referred to as a (A pattern) housing leg 30.

In FIG. 8A, the center position of the square plate 50 and the center position of the equilateral triangle formed by the three female screw portions 55, 55, 55 are substantially overlapped, and the center position is changed even if rotated by 90 °. Therefore, the square plate 50 can be rotated 90 ° clockwise.
As shown in FIG. 9A, the side 54 is set at the head, and the plate center line 56 is set to be perpendicular to the side walls 42L and 42R. In this state, the square plate 50 is inserted.
As shown in FIG. 9B, the female screw portions 55, 55, 55 can be seen through the leg-side through holes 34, 34, 34. The form in FIG. 9B in which the side 54 approaches the back wall 41 and the plate center line 56 is perpendicular to the side walls 42L and 42R is referred to as a (B pattern) housing leg 30.

  The leg side through-hole 34 is inserted into each position of the female screw portion 55 when the square plate 50 is inserted in the front direction as shown in FIG. 8A, and the square plate 50 is inserted in the horizontal direction as shown in FIG. 9A. It is a long hole opened in the range which connects each position of the internal thread part 55 corresponding respectively.

In FIG. 8A, the bent portions 43L and 43R also play a role of increasing the rigidity (bending rigidity, bending rigidity) of the pedestal 35. That is, the rigidity of the side walls 42L and 42R is increased by attaching the bent portions 43L and 43R than when the side walls 42L and 42R are simple flat walls.
However, the bent portions 43L and 43R can be omitted by making the left and right two receiving projections 44 and 44 into four on the left and right. Therefore, whether or not the bent portions 43L and 43R are provided is arbitrary.

  As shown in FIG. 10A, the hot water storage tank 12 is provided with three tank legs 11 at an equal pitch so that θ is 120 °. The tank legs 11 are generally arranged below the hot water storage tank 12 so as to overlap the hot water storage tank 12. However, in order to make it easy to see, the tank legs 11 are arranged at positions that do not overlap the hot water storage tank 12.

  The three tank legs 11 are arranged along a reference line 21 that extends radially from the center 12 a of the hot water storage tank 12. One tank leg 11 has a first bolt hole 22 disposed on the reference line 21, and a second bolt hole 23 and a third bolt hole 24 disposed so as to be symmetrical with respect to the reference line 21. The 1st-3rd bolt holes 22-24 are arrange | positioned at the vertex of an equilateral triangle.

For convenience, the housing leg 30 is illustrated at a position away from the tank leg 11, but is correctly disposed directly below the tank leg 11.
In order to specify the positions of the three casing legs 30, the front leg is referred to as a casing leg 30F, the left back leg is referred to as a casing leg 30L, and the right back leg is referred to as a casing leg 30R.

  In FIG. 10A, the three casing legs 30F, 30L, and 30R are the (A type) casing legs 30 described in FIG. 8B. The chassis legs 30F, 30L, and 30R can be connected to the tank legs 11, 11, and 11, respectively.

In FIG. 10B, the front case leg 30F is the (B type) case leg 30 described in FIG. 9B. (B type) Since it is the case leg 30, the case leg 30F on the near side can be connected to the tank leg 11 on the near side.
In FIG. 10C, the three housing legs 30F, 30L, and 30R are the (B type) housing legs 30 described in FIG. 9B. The chassis legs 30F, 30L, and 30R can be connected to the tank legs 11, 11, and 11.

  That is, the form of Fig.10 (a)-(c) was realizable only by preparing the housing leg 30 provided with the square board 50 shown in FIG. As a result, the hot water storage device 10 that can rotate the casing legs 30F, 30L, and 30R by 90 ° while providing only one type of casing legs 30F, 30L, and 30R is provided.

In FIG. 2, if the square plate 50 is eliminated and a nut is used, the diameter of the leg-side through hole 34 is reduced and a washer is required so that the nut does not sink.
In this regard, in the present invention, since there is no fear that the square plate 50 sinks, the diameter of the leg side through hole 34 can be increased. Since the hole diameter is large, strict positioning becomes unnecessary and workability is improved. Since the square plate 50 plays the role of a washer, the washer is unnecessary, and the number of parts to be prepared can be reduced.

Further, when the square plate 50 is eliminated and a nut is used, the pressure receiving area of the nut is limited, so that the plate thickness of the receiving portion 31 needs to be increased so that local deformation does not occur. When the blank member 32 shown in FIG. 3 is used, the pedestal portion 35 has the same thickness as the receiving portion 31. In this case, if the receiving part 31 is thickened, the blank material 32 will become heavy and it will lead to the weight increase of the housing | casing leg 30. FIG.
In this regard, in the present invention, since the square plate 50 having a pressure receiving area much larger than that of the nut is adopted, there is no fear that local deformation occurs in the receiving portion 31. Since it is not necessary to thicken the receiving part 31, the blank material 32 can be made thin and the weight reduction of the housing leg 30 can be achieved.

In FIG. 2, when the square plate 50 is eliminated and the nut is used, the operator puts the nut against the lower surface of the receiving portion 31 with one hand and inserts the connecting bolt 16 from above with the other hand. It will be tightened by hand. Perform final tightening after hand tightening. This procedure is repeated three times for each receiving portion 31, but the nut may be dropped during this time, making the operation difficult.
In this regard, in the present invention, since the three female screw portions 55 of the square plate 50 can be seen from above, the three connecting bolts 16 can be quickly fastened by positioning the square plate 50 only for the first time. The work can be speeded up. The frequency of falling off like a nut is very low. Therefore, work becomes easy.

Next, the features of the present invention will be further described.
As shown to Fig.11 (a), in order to obtain a elongate material, the board 61 and the board 62 may be connected. A typical connection structure at this time is shown in FIG.
As shown in FIG. 11 (b), gussets 63, 63 are vertically attached so as to straddle the plates 61 and 62, and are connected by a plurality of bolts 64 and nuts 65. Gusset 63, 63 plays the role of splint for fracture treatment. Thus, the plate 61 and the plate 62 are connected although they are not directly connected.

  Comparing FIG. 11B and FIG. 2, the nut 65 in FIG. 11B corresponds to the female thread portion 55 in FIG. Similarly, the lower gusset 63 corresponds to the plate 50, the plates 61 and 62 correspond to the receiving portion 31, the upper gusset 63 corresponds to the bottom plate 14, and the bolt 64 corresponds to the connecting bolt 16. Although the receiving portion 31 shown in FIG. 2 is divided near the center, it is firmly connected in the same manner as in FIG. By adopting this structure, as shown in FIG. 4, it can be said that the receiving portion 31 can be constituted by a central piece 31a, a left piece 31b, and a right piece 31c.

Next, the material yield will be described.
12A is a reprint of the blank 32 described in FIG. 3A, and FIG. 12B is a reprint of the cut plate 107 described in FIG. 14A.
The overall length of the blank 32 shown in FIG. 12 (a) is L1. The protruding length of the receiving portion 31 of the blank material 32 is approximately half the width of the back wall 31.
The total length of the back wall 101 and the substantially square receiving portion 105 shown in FIG. 12B is L2. The receiving part 105 approximates a square having the width of the back wall 101 as one side.
Therefore, the length L2 is larger than the length L1 by ΔL. ΔL is about half the width of the back walls 41 and 101.
Compared to the cut plate 107 of the comparative example, the blank material 32 according to the present invention becomes smaller and the material yield is improved.

Next, a modification example will be described.
As shown in FIG. 13A, the leg side through hole 34 may be round holes 34, 34 instead of a long hole.
Moreover, as shown in FIG.13 (b), you may comprise the receiving part 31 only with the left piece 31b and the right piece 31c. If the number of leg-side through holes 34 is an even number, half can be provided on the left piece 31b and the rest can be provided on the right piece 31c. That is, when the leg side through-hole 34 is an even number, the form of FIG.13 (b) is preferable. The left piece 31b and the right piece 31c may be placed on the back wall 41 in a bent form.

  Therefore, the receiving part 31 can be arbitrarily selected from two pieces (left piece 31b and right piece 31c) or three pieces (center piece 31a, left piece 31b and right piece 31c). it can. However, since the force applied to the receiving part 31 can be directly transmitted from the center piece 31a to the back wall 41, the structure of three pieces is more preferable.

Next, a modified example of the form in which the plate 50 is omitted will be described.
As shown in FIG. 14, a washer 67 may be applied to the lower surface of the receiving portion 31 and a nut 68 may be screwed into the connecting bolt 16. A bottom portion 19 of the tank leg 11 placed on the bottom plate 14 and a receiving portion 31 that receives the bottom plate 14 are connected by a connecting bolt 16 and a nut 68.
Even in this modified example, the receiving portion 31 is merely bent and the peripheral member is not spot-welded, so that the welding cost is unnecessary.

  Note that the plate 50 may be a square plate, a rectangular plate, or an octagonal plate with a beveled corner, and the shape of the plate 50 may be appropriately changed as long as the plate has the female screw portion 55.

  The present invention is suitable for a hot water storage apparatus in which a hot water storage tank is housed in a housing having housing legs.

  DESCRIPTION OF SYMBOLS 10 ... Hot water storage apparatus, 11 ... Tank leg, 12 ... Hot water storage tank, 13 ... Housing | casing, 14 ... Bottom plate of a housing | casing, 15 ... Housing | casing side through-hole, 16 ... Connection bolt, 19 ... Bottom part of tank leg, 22 ... Bolt hole (First bolt hole), 23 ... bolt hole (second bolt hole), 24 ... bolt hole (third bolt hole), 30 ... housing leg, 31 ... receiving portion, 31a ... piece (center piece), 31b ... Piece (left piece), 31c ... Piece (right piece), 33, 36, 37, 38, 39 ... Fold line (valley fold line), 34 ... Housing side through hole, 35 ... Leg pillar part, 41 ... Back wall, 42L, 42R ... side wall, 43L, 43R ... bent part, 44 ... receiving projection, 45 ... stopper, 46 ... leg bottom part, 47 ... installation surface, 50 ... plate, 55 ... female screw part.

Claims (7)

A hot water storage tank provided with tank legs for storing hot water, a housing for storing the hot water storage tank, a housing leg extending downward from a bottom plate of the housing to support the housing and the hot water storage tank, and the housing legs And a connecting bolt that connects the tank legs,
The tank leg has a bottom portion that rests on a bottom plate of the housing, and the bottom portion includes a plurality of bolt holes through which the connection bolts are passed,
The bottom plate of the housing has a housing-side through-hole through which the connection bolt passes.
The housing leg is in contact with the lower surface of the bottom plate of the housing and has a leg-side through hole through which the connecting bolt is passed, a leg pillar part extending downward from the receptacle part, and a lower part of the leg pillar part And a leg bottom portion that comes into contact with the installation surface,
The hot water storage device according to claim 1, wherein the receiving portion is formed of at least two pieces connected to the pedestal portion via a folding line.   The housing leg has a plate inserted below the receiving portion, and the plate has a plurality of female screw portions that are thicker than the plate thickness of the receiving portion and into which the connecting bolt can be screwed. The hot water storage device according to claim 1, wherein The pedestal portion is composed of left and right side walls and a back wall connecting these back ends so that the plate can be taken in and out,
The said receiving part consists of a left piece connected to the left side wall through the fold line and a right piece connected to the right side wall through the fold line. The hot water storage device described. The pedestal portion is composed of left and right side walls and a back wall connecting these back ends so that the plate can be taken in and out,
The receiving portion includes a left piece connected to the left side wall through the fold line, a right piece connected to the right side wall through the fold line, and the back wall through the fold line. The hot water storage device according to claim 2, wherein the hot water storage device is composed of a central piece connected to the center.   The hot water storage device according to claim 3 or 4, wherein a receiving projection for temporarily receiving the plate is provided on the side wall.   6. The hot water storage apparatus according to claim 5, wherein the pedestal portion has a bent portion bent inward at a tip end portion of the side plate, and the plate is temporarily received even at an upper end of the bent portion. apparatus.   The hot water storage device according to claim 6, wherein a stopper that defines a distance to which the plate is inserted is provided on the receiving portion or the back wall.

Images