JP2016055045A - Fryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fryer capable of enhancing intensity to a heat strain occurring on an oil tank.SOLUTION: A fryer 10 comprises: an oil tank 22 for storing cooking oil; an external housing 46 for surrounding outside of the oil tank 22; a combustion chamber 56 disposed between the oil tank 22 and the external housing 46; and a gas burner 58 disposed in the combustion chamber 56. The fryer 10 has a rib 38 formed by bending a wall face on a first front wall part 32a facing the combustion chamber 56 of the oil tank 22, for suppressing a heat strain.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a fryer for frying food to be cooked with cooking oil heated in an oil tank.

  The fryer for frying the food to be cooked is configured to heat an oil tank storing a predetermined amount of cooking oil from the outside by combustion means such as a gas burner. For example, the fryer of Patent Document 1 surrounds the outside of the oil tank with a heat insulating cover member, and a combustion chamber is defined between the front wall surface of the oil tank and the cover member. And the air in this combustion chamber is heated with the gas burner arrange | positioned in a combustion chamber, This heated air is distribute | circulated to the space formed between the said oil tank and the said cover member, and this oil tank is heated. In addition, heated air is discharged | emitted outside from the back surface duct connected to the said space.

JP 2000-116536 A

  The atmospheric air in the combustion chamber reaches a high temperature of about 1000 ° C. by heating of the gas burner. As a result, the temperature of the outer wall surface in contact with the heated air in the oil tank is about 450 ° C., and the temperature of the inner wall surface of the oil tank is about 300 ° C. When heated to a high temperature in this way, a so-called thermal strain is generated on the wall surface of the oil tank due to a significant temperature difference between the outside and the inside of the oil tank. In particular, the thermal strain is concentrated at a corner portion that transitions from the front wall surface to the side wall surface of the oil tank, and sometimes a stress strain exceeding the strength of the material (for example, stainless steel) constituting the oil tank may occur.

  In view of the above-described problems inherent in the prior art, the present invention has been proposed to suitably solve these problems, and an object of the present invention is to provide a fryer with enhanced strength against thermal distortion generated in an oil tank.

In order to overcome the above-mentioned problems and achieve the intended purpose, a flyer according to the invention of claim 1 is:
An oil tank in which cooking oil is stored, an outer casing surrounding the outside of the oil tank, a combustion chamber positioned between the oil tank and the outer casing, and a combustion means provided in the combustion chamber, and heated by the combustion means In a fryer that heats the oil tank by circulating air through a space formed between the oil tank and the outer casing,
The gist of the invention is to suppress the thermal distortion of the front wall surface by forming a rib on the front wall surface facing the combustion chamber of the oil tank.
According to the invention which concerns on Claim 1, the intensity | strength with respect to distortion of this wall surface can be raised by providing the rib in the front wall surface which faces the combustion chamber of an oil tank.

The gist of the invention according to claim 2 is that the rib is formed by curving the front wall surface.
According to the invention of claim 2, since the rib is provided by curving the front wall surface, the thermal strain generated on the wall surface can be absorbed by the curved shape of the rib. Furthermore, by providing the rib by curving the wall surface, the surface area in contact with the heated air on the front wall surface facing the combustion chamber is increased, so that the thermal efficiency of the fryer can be increased.

The invention according to claim 3 is configured such that the front wall surface is connected to a pair of side wall surfaces that are erected from the bottom of the oil tank and face each other.
Each of the pair of side wall surfaces is formed so as to be separated from each other as it goes upward from a bent portion provided in the middle of the vertical direction,
The gist is that the ribs are formed extending in the lateral direction of the front wall surface.
According to the second aspect of the present invention, the stress generated in the portion where the thermal strain connected to the side wall surface having the bent portion in the front wall surface can be effectively reduced by the laterally extending rib. The strength of the oil tank can be increased.

The gist of the invention according to claim 3 is that the rib extends from the edge of the front wall surface to the edge.
According to the invention which concerns on Claim 3, since the rib was formed over the edge from the edge of the wall surface which faces a combustion chamber, a rib can be easily provided in this wall surface by bending. Moreover, since the formation range of a rib can be enlarged, the absorption effect of a thermal strain and the thermal efficiency of a fryer can be improved.

  According to the fryer according to the present invention, this thermal distortion can be effectively suppressed even under a situation in which the occurrence of thermal distortion is a concern due to the temperature difference between the inside and outside generated on the wall surface of the oil tank storing cooking oil. In particular, the stress generated at the corner of the oil tank can be reduced.

1 is a schematic perspective view of a fryer according to Embodiment 1. FIG. It is a cross-sectional view of the fryer shown in FIG. It is a vertical side view of the fryer shown in FIG. It is a vertical front view of the fryer shown in FIG. 3 is a schematic front view showing a first front wall portion of the oil tank according to Example 1. FIG. It is the schematic perspective view which looked at the fryer which concerns on Example 1 from the downward direction, Comprising: A casing is shown with a dashed-two dotted line. It is a schematic exploded perspective view explaining the structure of another Example which fixes a heat insulating material to the panel of an exterior housing | casing. (a) is a schematic side view of the fixing member before attaching to a panel, (b) is a schematic sectional drawing which shows the state which attached the fixing member to the panel. (a) is a schematic front view of the 1st front wall part in the oil tank concerning Example 2, (b) is a bb line sectional view of (a), and (c) is the 2nd rib. It is explanatory drawing explaining formation of. It is a schematic front view of the 1st front wall part in the oil tank which concerns on the example of a change.

  Next, the flyer according to the present invention will be described below with reference to the accompanying drawings by way of preferred embodiments.

  As shown in FIGS. 1 to 4, the flyer 10 according to the first embodiment includes an oil tank 22 in which cooking oil is stored, an outer casing 46 that surrounds the outside of the oil tank 22, and between the oil tank 22 and the outer casing 46. And a gas burner 58 as combustion means provided in the combustion chamber 56. The fryer 10 circulates the air heated by the gas burner 58 through the ventilation paths (spaces) 60 and 62 between the oil tank 22 and the cover outer casing 46 to heat the oil tank 22. The casing 12 in which the oil tank 22 is accommodated is configured in a box shape that opens upward from the bottom plate 12d, the front plate 12a, the rear plate 12c, and the left and right side plates 12b and 12b. And the main-body part 24 mentioned later of the oil tank 22 is accommodated in the inside of the casing 12. The rear plate 12c of the casing 12 is configured to extend upward by a predetermined length from the upper ends of the side plates 12b and 12b and cover the rear side of the duct 64 described later.

  As shown in FIGS. 1 to 5, the oil tank 22 includes a main body portion 24 configured in a box shape that opens upward, and a support portion 26 provided at the upper end of the main body portion 24. The oil tank 22 is configured such that the support portion 26 is placed on the upper ends of the front plate 12 a and the left and right side plates 12 b and 12 b of the casing 12 in a state where the main body portion 24 is accommodated in the casing 12. The main body 24 is provided with a substantially rectangular bottom 28, a pair of side walls 30, 30 that are erected from the left and right side ends of the bottom 28 and opposed to the left and right, and a front end of the bottom 28. The front wall 32 connects the front ends of the left and right side walls 30, 30, and the rear wall 34 stands from the rear end of the bottom portion 28 and connects the rear ends of the left and right side walls 30, 30. The oil tank 22 is configured by welding a sheet metal formed in a required shape.

  As shown in FIG. 4, the left and right side walls 30, 30 constituting the main body portion 24 are connected to the left and right side ends of the bottom portion 28, and first side wall portions (side wall surfaces) extending substantially vertically upward from the lower end. ) 30a, a second side wall portion (side wall surface) 30b extending obliquely outwardly to the left and right as it goes upward from the upper end of the first side wall portion 30a, and left and right from the upper end of the second side wall portion 30b. The third side wall portion 30c extends outward substantially horizontally and is bent upward. Thus, the lower part of each side wall 30 and 30 is comprised so that it may bend at the connection part of the 1st side wall part 30a and the 2nd side wall part 30b. That is, the side walls 30 and 30 are inclined so as to be separated from each other as they go upward from the bent portion 36 located in the middle of the vertical direction. Each of the side walls 30 and 30 is connected to the rear wall 34 constituting the main body 24 at the rear ends of the first side wall 30a, the second side wall 30b, and the third side wall 30c.

  As shown in FIGS. 2 to 5, the front wall 32 constituting the main body portion 24 is a first front wall portion 32 a (a wall surface facing the combustion chamber 56) extending substantially vertically from the front end of the bottom portion 28. A second front wall portion 32b extending obliquely forward as it goes upward from the upper end of the first front wall portion 32a, and extending substantially vertically upward from the upper end of the second front wall portion 32b. It is comprised from the 3rd front wall part 32c. The first front wall portion 32a connects the front ends of the first side wall portion 30a and the second side wall portion 30b in the left and right side walls 30,30. The left and right dimensions (horizontal width) of the first front wall portion 32a are substantially constant from the lower end to the bent portion 36 located in the middle of the vertical direction, and the upper side of the bent portion 36 is above the bent portion 36. As it goes to, it is formed to spread to the left and right. The left and right side ends 32ab of the first front wall portion 32a extend substantially vertically from the lower end to the bent portion 36, and the upper side of the bent portion 36 is inclined left and right outward. The second front wall portion 32b and the third front wall portion 32c connect the front ends of the third side wall portions 30c in the left and right side walls 30,30.

  As shown in FIGS. 2, 3 and 5, the first front wall portion 32a is formed with a first rib (rib) 38 by curving the wall surface. In the first embodiment, two first ribs 38 extending in the left-right direction (lateral direction) are provided apart from each other in the vertical direction. The first rib 38 is provided by bending the first front wall portion 32a so as to protrude rearward (curved from the outer wall surface side to the inner wall surface side), and the two first ribs 38 are provided in the bent portion. It arrange | positions so that 36 may be pinched | interposed up and down. The first front wall portion 32a has the surface area of the outer wall surface (surface facing the combustion chamber) and the inner wall surface (surface contacting the cooking oil) increased by the first rib 38, and the strength of the first front wall portion 32a is increased. It is getting bigger.

  Next, the support part 26 provided in the upper end of the main-body part 24 in the said oil tank 22 is demonstrated. As shown in FIG. 3 and FIG. 4, a frame portion that is inclined to the left and right outwards toward the upper end of the third side wall portion 30 c of the left and right side walls 30, 30 so as to be separated from the other side wall 30, 30 as it goes upward. 40 is formed. Further, an inclined surface 42 that is inclined upward toward the front is formed at the upper end of the third front wall portion 32c of the front wall 32, and the front ends of the left and right frame portions 40 are connected to the left and right side ends of the inclined surface 42, respectively. Yes. Further, an upper rear wall 44 is formed at the upper end of the rear wall 34 of the main body 24 and extends upward to a position substantially the same as the rear plate 12c of the casing 12. In the oil tank 22, the support portion 26 is configured by the left and right frame portions 40, the inclined surface 42, and the upper rear wall 44. In a state where the main body portion 24 of the oil tank 22 is accommodated in the casing 12, the left and right frame portions 40 and the inclined surface 42 are connected to the corresponding left and right side plates 12b and 12b and the upper end of the front plate 12a. Yes. The oil tank 22 includes a rear wall 34 of the main body 24 and an upper rear wall 44 of the support portion 26 that are integrally formed. The rear plate 12c of the casing 12 that is spaced rearward from the rear walls 34 and 44, the walls provided at the left and right side ends of the rear walls 34 and 44, and the side plates 12b and 12b of the casing 12 are described later. A space for accommodating the duct 64 is defined.

  As shown in FIGS. 2 to 4, the outer casing 46 is disposed outside the oil tank 22 at a predetermined interval. The outer casing 46 includes a front panel 48 a disposed on the front wall 32 of the oil tank 22, a pair of left and right side panels 48 b and 48 b disposed on the left and right side walls 30 and 30 of the oil tank 22, and the oil tank 22. From the rear panel 48 c disposed on the rear wall 34 and the bottom panel 48 d disposed on the bottom portion 28 of the oil tank 22, it is formed in a box shape opening upward. The front panel 48a is spaced apart from the front (outside) of the first front wall 32a, and is connected to the lower surface of the second front wall 32b at the upper end of the front panel 48a. The left and right side panels 48b, 48b are spaced apart from the left and right outer sides (outside) of the first side wall 30a and the second side wall 30b, and the first side panels 48b, 48b are located above the side panels 48b, 48b. It is connected to the outer wall surface of the three side wall portions 30c. As shown in FIG. 3, a front panel 48a, left and right side panels 48b and 48b, a bottom panel 48d, a first front wall portion 32a and a second front wall portion of the main body 24 are provided at the front portion of the oil tank 22. The combustion chamber 56 is defined by 32b. That is, the first front wall portion 32 a and the second front wall portion 32 b in the main body portion 24 of the oil tank 22 face the combustion chamber 56. The combustion chamber 56 is provided with the gas burner 58, and the gas in the combustion chamber 56 is heated by the gas burner 58 by burning a gas supplied from a gas supply source (not shown). . Further, left and right side panels 48b, 48b, a bottom panel 48d, a first side wall portion 30a, a second side wall portion 30b, and a third side wall portion 30c of the oil tank 22, on the left and right outer sides of the side walls 30, 30 in the oil tank 22, respectively. Thus, a side ventilation path 60 is defined. A rear ventilation path 62 is defined at the rear part of the oil tank 22 by the rear panel 48 c, the bottom panel 48 d, and the rear wall 34 part of the main body 24. The side air passage 60 is configured to open to the front and rear and communicate with the combustion chamber 56 and the rear air passage 62. That is, a combustion chamber 56, a side ventilation path 60 and a rear ventilation path 62 communicating with the combustion chamber 56 are formed between the oil tank 22 and the outer casing 46, and the heated air flowing through the ventilation paths 60 and 62 The cooking oil stored in the oil tank 22 is heated. A heat insulating material 52 is provided on the inner surface of each panel 48 of the outer casing 46 facing the oil tank 22.

  As shown in FIGS. 1 to 3 and FIG. 6, a duct 64 extending in the vertical direction is disposed between the rear wall 34 of the oil tank 22 and the rear plate 12 c of the casing 12. An exhaust path 66 extending in the vertical direction is defined inside the duct 64. An opening 66 a that communicates with the opening 50 provided in the rear panel 48 c of the outer casing 46 is formed in the lower front portion of the duct 64. An exhaust port 66b penetrating in the vertical direction is formed on the upper surface of the duct 64. That is, the heated air that has flowed into the exhaust passage 66 from the rear ventilation passage 62 is discharged to the outside through the exhaust port 66b. As shown in FIGS. 3 and 6, the rear wall 34 of the oil tank 22 is provided with a reinforcing member 68 extending in the left-right direction (lateral direction) on the back surface. The reinforcing member 68 is formed by bending a flat sheet metal into an L shape, and is joined to the rear wall 48 of the rear wall 34 of the oil tank 22 above the rear panel 48c by spot welding. Since the strength of the rear wall 34 is enhanced by the reinforcing member 68 extending in contact with the rear wall 34, the oil tank 22 can suppress distortion of the rear wall 34 and the upper rear wall 44 due to the heating of the gas burner 58. it can. Further, by suppressing the distortion of both rear walls 34, 44, surface contact between both rear walls 34, 44 and the duct 64 disposed behind the rear walls 34, 44 is prevented. The heat of the duct 64 that passes through is directly transmitted to the rear wall 34, and the oil tank 22 does not partially become hot. In addition, the distortion at the time of welding of this oil tank 22 is also suppressed by welding the reinforcement member 68 to the rear wall 34 before shape | molding the oil tank 22 by welding.

[Operation of Example 1]
Next, the operation of the fryer 10 of the first embodiment configured as described above will be described. When the gas burner 58 is burned, the air in the combustion chamber 56 is heated, and the heated air flows through the side ventilation path 60 and the rear ventilation path 62 and then flows into the exhaust path 66 of the duct 64. The air is exhausted from the exhaust port 66b. The heated air includes a first front wall portion 32a and a second front wall portion 32b that face the combustion chamber 56 in the oil tank 22, and a first side wall portion 30a, a second side wall portion 30b, and a third side wall that face each side ventilation passage 60. The oil tank 22 is heated in contact with the outer surfaces of the portion 30 c and the rear wall 34 facing the rear ventilation path 62. Thereby, the cooking oil stored in the oil tank 22 is heated. Since the first rib 38 is provided on the first front wall portion 32a facing the combustion chamber 56 in the oil tank 22, the fryer 10 according to the first embodiment has an increased strength compared to a flat plate-like wall portion without ribs. For this reason, generation | occurrence | production of the thermal distortion in the 1st front wall part 32a which faces the combustion chamber 56 and contacts high temperature heating air can be suppressed. Moreover, by providing the 1st rib 38, the surface area of the outer wall surface which contact | connects the heating air of the combustion chamber 56 in the 1st front wall part 32a can be increased, and cooking oil can be heated efficiently. In addition, since the 1st rib 38 is formed so that the surface area of the inner wall face which contacts cooking oil may also increase, cooking oil can be heated more efficiently. Further, since the first rib 38 is formed by curving the wall surface of the first front wall portion 32a, the thermal distortion generated in the first front wall portion 32a is absorbed by the curved shape of the first rib 38. Can do.

  The fryer 10 has a configuration in which thermal strain tends to concentrate on the corner portion of the oil tank 22 where the first front wall portion 32a and the first and second side wall portions 30a, 30b are connected, particularly the bent portion 36 of the corner portion. It has become. In the flyer 10 of the first embodiment, the first rib 38 extending in the left-right direction is provided on the first front wall portion 32a, so that the strength against the thermal distortion of the first front wall portion 32a is increased and the corner portion is formed. The generated stress can be reduced. In addition, by providing the bending part 36, the surface area which contacts the heating air in the oil tank 22 can be increased, and cooking oil can be heated efficiently. In the flyer 10 of the first embodiment, since the first rib 38 is formed so as to sandwich the bent portion 36 vertically, the stress generated in the bent portion 36 of the first front wall portion 32a is applied to the first rib. 38 can be effectively reduced.

  Here, FIGS. 7 and 8 show another embodiment of a structure in which the heat insulating material 52 is fixed to each panel 48 of the outer casing 46. In another embodiment, the heat insulating material 52 is fixed to the panel 48 by a fixing member 70 configured to sandwich the heat insulating material 52 between the panel 48. The fixing member 70 is a belt-like member that is long in the vertical direction, and includes a pressing portion 72 that holds the heat insulating material 52 along the panel 48 and bending portions 74 and 74 formed at the upper and lower ends of the pressing portion. Prepare. The pressing portion 72 is formed in accordance with the outer shape of the pressing heat insulating material 52, and is configured to hold the heat insulating material 52 between the pressing portion 72 and the inner surface of the panel 48. As shown in FIG. 8A, the bent portion 74 is formed by bending the upper end and the lower end of the holding portion 72 at an acute angle (88 degrees in another embodiment). Further, the bending portion 74 is provided with a screw hole 78 that overlaps with the mounting hole 76 provided in the panel 48. As shown in FIG. 8B, the fixing member 70 has a screw (not shown) in the screw hole 78 through the corresponding mounting hole 76 in a state where the heat insulating material 52 is sandwiched between the panel 48 and the fixing member 70. Attached to the panel 48 by screwing. The fixing member 70 is in a state in which the angle formed by the presser portion 72 and the bent portion 74 is widened so that the portions of the upper and lower bent portions 74, 74 extending from the presser portion 72 and facing the upper and lower sides extend horizontally. Mounted. In other words, the fixing member 70 is formed so that the angle formed between the presser portion 72 and the bent portion 74 is smaller than the angle attached to the panel 48, and the angle formed between the presser portion 72 and the bent portion 74 is expanded. Mounted on. For this reason, in a state where the fixing member 70 is attached to the panel 48, the pressing portion 72 of the fixing member 70 acts to push the heat insulating material 52 toward the panel 48. Furthermore, even if the fixing member 70 is heated by the heated air and the presser part 72 extends, the presser part 72 is deformed so as to push the heat insulating material 52 toward the panel 48 side. That is, the fixing member 70 is not deformed so that the presser portion 72 swells away from the heat insulating material 52 even in a heated gas atmosphere, and the heat insulating material 52 can be stably pressed toward the panel 48 side. Further, since the fixing member 70 can appropriately fix the heat insulating material 52 to the panel 48 without using an expensive heat-resistant material, the manufacturing cost can be suppressed.

  Next, a fryer according to the second embodiment will be described with reference to FIG. For the second embodiment, the same reference numerals are used for the same components as the flyer of the first embodiment.

  In the second embodiment, the second rib (rib) 80 provided on the first front wall portion 32a is different from the first rib 38 of the first embodiment. As shown in FIG. 9A, the second rib 80 extends from the right end (end edge) to the left end (end edge) of the first front wall portion 32a. In the second embodiment, two second ribs 80 extending in the left-right direction (lateral direction) are provided. The two second ribs 80 are disposed below the bent portion 36. As shown in FIG. 9B, the second rib 80 has a wall surface of the first front wall portion 32a from the front (the outer wall surface on the combustion chamber 56 side) to the rear (the inner wall surface side where the cooking oil contacts). It has a curved shape. As shown in FIG. 9C, the second rib 80 is formed by bending a sheet metal forming the first front wall portion 32 a with a mold 82. The mold 82 includes a convex mold 82a having a mold surface formed in accordance with the front shape of the first front wall portion 32a (the convex shape of the second rib 80), and the rear surface shape of the first front wall portion 32a ( And a concave mold 82b formed in conformity with the concave shape of the second rib 80. According to the second embodiment, since the second rib 80 is formed from the right end to the left end of the first front wall portion 32a, a simple configuration can be achieved without using a drawing die having a wrinkle presser or the like. The bending mold 82 can be used for molding. That is, according to the second embodiment, the oil tank 22 provided with the second rib 80 can be efficiently manufactured at low cost. Further, according to the second embodiment, since the second rib 80 is provided in the left-right direction of the first front wall portion 32a, the formation range of the second rib 80 is increased to absorb the thermal strain and the flyer. The thermal efficiency of 10 can be increased.

[Example of change]
The flyer according to the present invention is not limited to the configuration described above, and can be modified as follows, for example.
(1) In the embodiment, the gas burner is used as the combustion means, but various known means such as an oil burner and an electric heater can be used as the combustion means.
(2) In the embodiment, the rib is provided on the wall surface standing from the bottom of the oil tank, but the rib can be formed on the wall surface facing the combustion chamber in the oil tank.
(3) In the embodiment, the rib having a shape curved from the combustion chamber side to the inner wall surface where cooking oil is stored has been described as an example, but the rib curved from the inner wall surface of the oil tank to the combustion chamber side has been described as an example. It may be.
(4) In the embodiment, an example in which two ribs extending in the horizontal direction are provided above and below has been described. However, as shown in FIG. 10A, one rib 86a extending in the horizontal direction is provided. It may be a configuration. Further, as shown in FIG. 10B, one rib 86b extending in the vertical direction may be provided, or as shown in FIG. 10C, three or more ribs 86c may be provided. Further, as shown in FIG. 10 (d), a rib 86d having a shape bent in the middle may be used. In addition, the rib 86d of FIG.10 (d) is bent by the boomerang type along the side edge 32ab of the wall surface 32a in which this rib 86d was formed.

10 fryer, 22 oil tank, 30a first side wall (side wall surface),
30b 2nd side wall part (side wall surface), 32a 1st front wall part (front wall surface), 36 bending part,
38 1st rib (rib), 46 outer casing, 56 combustion chamber, 58 gas burner (combustion means),
60 side ventilation path (space), 62 rear ventilation path (space), 80 second rib (rib)

Claims (4)

An oil tank (22) for storing cooking oil; an outer casing (46) surrounding the outside of the oil tank (22); and a combustion chamber (56) positioned between the oil tank (22) and the outer casing (46). A combustion means (58) provided in the combustion chamber (56), and a space (60) formed between the oil tank (22) and the outer casing (46) by the heated air by the combustion means (58). , 62) in a fryer that heats the oil tank (22),
The front wall (32a) facing the combustion chamber (56) of the oil tank (22) is formed with ribs (38, 80) to suppress thermal distortion of the front wall (32a). And flyer.   The fryer according to claim 1, wherein the rib (38, 80) is formed by curving the front wall surface (32a). The front wall surface (32a) is configured to connect to a pair of side wall surfaces (30a, 30b) that are erected from the bottom of the oil tank (22) and face each other.
Each of the pair of side wall surfaces (30a, 30b) is formed to be inclined so as to be separated from each other as it goes upward from a bent portion (36) provided in the middle of the vertical direction,
The fryer according to claim 1 or 2, wherein the ribs (38, 80) are formed extending in a lateral direction of the front wall surface (32a).   The fryer according to any one of claims 1 to 3, wherein the rib (80) extends from an edge of the front wall surface (32a) to the edge.

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