JPS626431Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a direct-fired cast iron enamel bathtub placed on a furnace.

[Prior art]

Conventionally, a problem with direct-fired cast iron enamel bathtubs is the occurrence of cracks in the bottom part due to external impact during installation. This is due to the poor impact resistance of cast iron enamel, which requires careful handling when installed on a furnace, resulting in poor workability. In addition, the bottom of conventional bathtubs is flat and has a drainage slope toward the center of the tank, so when placed on the top of the lower block that makes up the furnace wall, there is a gap between the bottom of the bathtub and the bottom of the bathtub. This created a looseness and required filling. Furthermore, level adjustment is complicated, and there are problems in that it is difficult to handle during installation and is difficult to perform.

In order to prevent cracks from occurring due to external impacts, some designs have a thicker bottom wall, but this leads to longer manufacturing times and lower yields in the casting and firing processes. , the cost was becoming high. In addition, increasing the wall thickness increases the heat capacity of the bathtub itself, which reduces thermal efficiency.In addition, increasing the weight of the bathtub results in poor cargo handling and workability, so it is necessary to increase the bottom wall thickness to prevent cracks. What I did was not necessarily effective.

Furthermore, since the lower block of the furnace that receives the bathtub is provided with a fire opening, an air outlet to the flue, etc., the planar shape of the inside of the furnace is complicated. For this reason, when the legs are provided on the bottom of the bathtub, it is necessary to have a structure in which the legs rest stably on the lower block.

Therefore, the present invention prevents the occurrence of cracks in the bottom of a cast iron enamel bathtub, and at least three legs of the bathtub are placed on top of the lower block in accordance with the arrangement of the lower block of the furnace. The purpose is to stabilize the installation.

[Structure of the idea]

In order to achieve the above-mentioned purpose, the present invention has a lower block of the furnace which is equipped with a firing opening on one side and an air outlet communicating with the flue on the other side so that the flat area inside the furnace is expanded. In a direct-fired cast iron enamel bathtub, the legs are provided with protruding legs and placed on the upper surface of the lower block, and the legs are shaped like substantially crosses located at substantially four corners of the lower surface of the bathtub body. It is characterized by comprising a first protrusion having a shaped cross section, and a second protrusion disposed approximately in the center of the side corresponding to the combustion opening and the flue side.

〔Example〕

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

FIG. 1 is a bottom view of a cast iron enamel bathtub according to the present invention, and FIG. 2 is a sectional view of the installed state taken along the - line arrow in FIG. 1. In the figure, 1 is the bathtub body, 2 is its bottom wall, and a drainage groove 3 is recessed in the center. 4a and 4b are first stud-shaped legs projecting downward from the bottom wall 2;
This is a second protrusion, and is provided on the left and right short sides R and L of the bathtub body 1, corresponding to the firing port side and the flue side of the furnace, which will be described later.

Figures 3 and 4 represent the - and - lines in Figure 1.
It is an enlarged view of the 1st and 2nd protrusion 4a, 4b shown by the line arrow.

In this example, first protrusions 4a having a cross-shaped cross section are provided at the four corners of the bottom wall 2, and T is provided on the longitudinal axis.
The second protrusions 4b having a letter-shaped cross section are arranged, and three second protrusions 4b are provided on each opposing side. Further, the second protrusion 4b having a T-shaped cross section at the center is the first protrusion 4a having a cross-shaped cross section.
It is located on the outside of the bathtub body 1.

In the above configuration, when the bathtub body 1 is placed on the furnace F, the first protrusion 4a and the first protrusion 4a and the first protrusion 4a are supported at at least three points on the lower block, which is constructed by arranging the refractory blocks 5 as shown in FIG. Two protrusions 4b can be placed thereon. That is, as shown in FIG. 5, in the furnace F, the side of the fire mouth C where the fire mouth hardware A is attached is in an open state,
On the flue (not shown) side D, blow-off ports E must be formed on the left and right sides so that the area of the furnace becomes larger. Therefore, in the arrangement of the refractory block 5, the line forming the inside of the furnace F is not flush, and the first protrusion 4a cannot be placed at the blow-up opening E position. However, in the present invention, the flue side D and the fire opening side C of the bathtub body 1 are
Since the second protrusion 4b is provided on the side, it can be placed on the block 5a between the blow-off ports E on the flue side D. Therefore, the bathtub body 1 can be placed on the lower block of the furnace F by three-point support, and can be placed in a stable state.

Moreover, the shock during installation is caused by the first and second protrusions 4a,
Since the bottom wall 2 does not come into direct contact with the blocks 5 and 5a, the occurrence of cracks can be prevented.

Further, since the bathtub body 1 is supported by the blocks 5 at at least three points, if the level is poor, the volume can be adjusted at any of these points, so the level adjustment is easy and the construction is simple.

〔effect〕

As explained above, in the direct-fired cast iron enamel bathtub of the present invention, even if the lower block of the furnace has a fire outlet or an air outlet to the flue, at least the three points placed on the lower block are The legs support the bathtub body. Therefore, since only the thick legs receive the impact when placed on the lower block, cracks can be prevented and the bathtub body can be stably installed with three-point support. Further, since the leg portions located at the corner portions of the bathtub body have a cross-shaped cross section, the mounting area on the lower block is increased, and the one-tub bathtub body can be more stably supported. In addition, by using a cross-shaped cross section like this instead of legs that simply increase the mounting area, it is possible to prevent sink marks and uneven thickness during the casting process of the bathtub body, which can lead to cracks. can be effectively prevented.

[Brief explanation of the drawing]

Fig. 1 is a bottom plan view of a cast iron enamel bathtub according to the present invention, Fig. 2 is a cross-sectional view of the cast iron enamel bathtub placed in a furnace as viewed from the - line arrow in Fig. 1, and Figs. FIG. 4 is an enlarged view of the protrusion shown in the direction of arrows indicated by the - and - lines in FIG. 1, and FIG. 5 is a perspective view showing the assembled state of the lower furnace block. 1...Bathtub body, 2...Bottom wall, 4a...1st
Protrusion, 4b...Second protrusion, 5...Block, F...
... Furnace construction, C... Fire opening side, D... Flue side.

Claims (1)

[Scope of utility model registration request] The lower block of the furnace is arranged so that the flat area inside the furnace is expanded, with a firing opening on one side and an air blowing opening communicating with the flue on the other side, and legs protruding from the lower surface are provided so that the legs In a direct-fired cast iron enamel bathtub placed on the upper surface of the lower block, the legs are
The bathtub body is characterized by comprising a first protrusion having a substantially cross-shaped cross section located at substantially four corners of the lower surface of the bathtub body, and a second protrusion disposed approximately at the center of the side corresponding to the fire spout and flue side. A direct-fired cast iron enamel bathtub.