Heating cooking device

Abstract

To provide a heating cooking device that facilitates attachment of a fixing member to a catalyst plate.SOLUTION: A catalyst plate 8 is positioned on an upper surface of a first frame 5. Burring portions of burring holes 57 and 58 provided respectively in a right support wall 51 and a left support wall 52 of the first frame 5 are inserted into slits 67 and 68 provided respectively in a corresponding right projecting wall 61 and left projecting wall 62 of a second frame 6. In this state, the second frame 6 is pressed toward the first frame 5 side, and the second frame 6 is guided toward the first frame 5 side by the slits 67 and 68 and the burring portions. Then, a pair of locking portions 612 is fitted into a pair of locked holes 512, and a pair of locking portions 622 is fitted into a pair of locked holes 522.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a cooking device. [Background technology]

[0002] Conventionally, a grill has been known that has an afterburner in an exhaust duct that burns and eliminates oily smoke generated from the food being cooked, and a catalyst plate that is heated and activated by the combustion of the afterburner (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-55185 Summary of the Invention [Problem to be solved by the invention]

[0004] Normally, catalyst plates are fixed inside exhaust ducts with fixing members attached, but to improve grill production efficiency, there was a need to make it easier to attach fixing members to catalyst plates.

[0005] An object of the present invention is to provide a cooking device that can facilitate the attachment of a fixing member to a catalyst plate. [Means for solving the problem]

[0006] The cooking device of claim 1 is a cooking device comprising an exhaust duct that discharges combustion exhaust gas flowing from inside a grill chamber to the outside of the grill chamber, and a catalyst plate fixed inside the exhaust duct by a fixing member, in which, assuming that the thickness direction of the catalyst plate is the up-down direction, the fixing member comprises a first frame attached from below the catalyst plate and a second frame attached from above the catalyst plate, and supports the catalyst plate on the inside when the first frame and the second frame are combined with each other, the first frame supports the catalyst plate from below and comprises a first main body portion having a first opening facing the catalyst plate, and right and left support walls that protrude from both left and right ends of the first main body portion above an upper surface of the catalyst plate and support the right and left surfaces of the catalyst plate from both left and right sides, respectively, the second frame supports the catalyst plate from above and comprises a second main body portion having a second opening facing the first opening via the catalyst plate, and a right protruding wall and a left protruding wall overlapping with the inner surfaces of the right support wall and the left support wall above the upper surface of the catalyst plate, the right protruding wall and the left protruding wall having a slit extending in the up-down direction and a pair of locking portions that protrude on both front and rear sides of the slit to the side opposite the second opening, the right support wall and the left support wall having a screw hole overlapping with a duct side fixing hole provided in the exhaust duct and fastened with a screw, and a burring portion protruding from the inner peripheral edge of the screw hole toward the center in the left-right direction; and a pair of engaging holes provided on both the front and rear sides of the burring hole at positions corresponding to the engaging portions, and when the burring portions of the burring holes provided in each of the right support wall and the left support wall are inserted into the slits provided in the corresponding right protruding wall and left protruding wall, the second frame is pressed toward the first frame, whereby the second frame is guided toward the first frame by the slits and the burring portions, and the engaging portions fit into the engaging holes.

[0007] The second main body portion of the heating cooking device of claim 2 may have a frame portion with the second opening in the center, the slit may extend to the frame portion, and the protruding width of the burring portion may be greater than the thickness width of each of the right protruding wall and the left protruding wall. [Effects of the Invention]

[0008] According to the cooking device of claim 1, the slits extend to the frame, preventing the burring parts from getting caught on the second frame when the second frame is dropped in. Furthermore, the burring parts that protrude beyond the thickness width of the right and left protruding walls can be accommodated, preventing the burring parts from falling off the slits. Therefore, the cooking device can more stably support the catalyst plate within the exhaust duct.

[0009] According to the cooking device of claim 2, the slits extend to the frame of the second main body, preventing the burring parts from getting caught on the second frame when the second frame is dropped in. Furthermore, the burring parts that protrude beyond the thickness width of the right and left protruding walls can be accommodated, preventing the burring parts from falling out of the guide grooves. Therefore, the cooking device can more stably support the catalyst plate within the exhaust duct. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view of a grill device 1. [Figure 2] FIG. 1 is a cross-sectional perspective view of a grill device 1. [Figure 3] FIG. 1 is an exploded perspective view of a grill device 1. [Figure 4] FIG. [Figure 5] FIG. 2 is an exploded perspective view of the duct body 4. [Figure 6] FIG. 6 is an exploded perspective view of the duct body 4 as seen from a different angle from that of FIG. 5. [Figure 7] FIG. 2 is a perspective view of a catalyst plate 8 to which a fixing member 20 is attached. [Figure 8]FIG. 2 is an exploded perspective view of a fixing member 20 and a catalyst plate 8. [Figure 9] FIG. 2 is a perspective view of a first frame 5. [Figure 10] FIG. 2 is a perspective view of a second frame 6. [Figure 11] FIG. 2 is a perspective view of a state in which a catalyst plate 8 is positioned on a first frame 5. [Figure 12] 2 is a diagram showing the flow of combustion exhaust gas in an exhaust duct 10. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] An embodiment of the present invention will be described below. Unless otherwise specified, the devices, component configurations, etc. described below are not intended to be limiting and are merely illustrative examples. The drawings are used to explain technical features that may be adopted by the present invention. In this embodiment, the front-to-back, left-to-right, and up-to-down directions shown in the drawings will be used for explanation. Furthermore, the scales of the drawings do not necessarily match each other, and the drawings are enlarged or reduced as appropriate depending on the objects shown.

[0012] The configuration of the grill device 1 will be described with reference to Figures 1 to 3. The grill device 1 is attached inside the housing of a built-in stove (not shown). The grill device 1 includes a grill chamber 2 and an exhaust duct 10. The grill chamber 2 contains food to be cooked, which is heated and cooked using a grill burner (described below). The grill burner generates combustion exhaust gas inside the grill chamber 2 by gas combustion.

[0013] The structure of the grill chamber 2 will now be described. As shown in Figures 1 and 2, the grill chamber 2 is a roughly rectangular parallelepiped with an open front. A grill opening 13 is formed in the front of the grill chamber 2. The grill opening 13 is opened and closed by a grill door (not shown). As shown in Figure 3, the grill chamber 2 comprises a lower case 11 and an upper case 12. The upper case 12 is fixed to the top of the lower case 11 with screws (not shown). An upper burner 21 is provided in roughly the center of the upper case 12.

[0014] The lower case 11 has a bottom wall 15, a right wall 16, a left wall 17, and a back wall 18, and is box-shaped with an open top and front. A moving mechanism 19 is provided inside the lower case 11. The moving mechanism 19 has rails and supports the grill door and grill grate (not shown) so that they can slide freely in the front-to-rear direction. A lower burner 23 extends in the front-to-rear direction on the inner surface of the right wall 16. A lower burner 24 extends in the front-to-rear direction on the inner surface of the left wall 17. The lower burners 23 and 24 face each other and form a flame toward the center of the grill chamber 2. In this embodiment, the upper burner 21 and the lower burners 23 and 24 are collectively referred to as "grill burners."

[0015] The structure of the exhaust duct 10 will be described. As shown in Figures 1 and 2, the exhaust duct 10 is connected to the rear of the grill chamber 2. The exhaust duct 10 is chimney-shaped and extends upward. An exhaust port 49 is provided at the top of the exhaust duct 10. A communication port 9 (see Figure 2) is provided between the rear of the grill chamber 2 and the exhaust duct 10. The communication port 9 connects the inside of the grill chamber 2 with the inside of the exhaust duct 10. Therefore, the combustion exhaust gas generated in the grill chamber 2 flows into the exhaust duct 10 through the communication port 9 and is discharged to the outside through the discharge port 49.

[0016] 2 and 3, exhaust duct 10 includes a duct bottom plate 27, a burner support base 3, and a duct body 4. Duct bottom plate 27 is fastened with screws to the upper rear end side of lower case 11. Duct bottom plate 27 protrudes rearward from the upper rear end of lower case 11 and forms the bottom of exhaust duct 10.

[0017] The burner support base 3 is fixed to the rear of the grill chamber 2 and forms the upstream portion (front end portion) of the exhaust duct 10. The burner support base 3 supports the afterburner 7. As shown in FIG. 3 , the burner support base 3 includes a support plate 31, a right plate 32, a left plate 33, and a closing plate 34.

[0018] The support plate 31 has a rectangular shape that is long in the left-right direction when viewed from above. An opening (not shown) is provided in the support plate 31. The opening has a roughly rectangular shape that is long in the left-right direction. A combustion surface 75 (described below) of the afterburner 7 is positioned in the opening. The right plate 32 hangs down from the right end of the support plate 31. The left plate 33 hangs down from the left end of the support plate 31. The lower ends of the right plate 32 and the left plate 33 are fastened to both the left and right sides of the upper surface of the duct bottom plate 27 with screws.

[0019] The closing plate 34 extends vertically upward from the rear end of the support plate 31 and has a generally rectangular shape that is long in the left-right direction when viewed from the front. The closing plate 34 closes an opening 461 (described below) that is provided in the front wall 46 of the duct body 4. A fixing piece 36 is provided at the upper end of the closing plate 34 and bent back forward. The fixing piece 36 has fixing holes 361 provided in three locations: the center, right side, and left side.

[0020] The structure of the afterburner 7 will be described. As shown in FIG. 3, the afterburner 7 comprises a burner body 71 and a burner flange 72. The burner body 71 is formed in the shape of a box that is long in the left-right direction, and its bottom surface is open. A gas inlet portion 74 is provided at the right end of the burner body 71. The gas inlet portion 74 is throat-shaped and opens to the right. Gas and air flow in from the gas inlet portion 74 and are mixed inside the burner body 71.

[0021] The burner flange 72 is fixed to the lower part of the burner body 71 and has a generally rectangular frame shape that is long in the left-right direction when viewed from the bottom. A combustion body 70 (see FIG. 2) is fitted into an opening (not shown) inside the burner flange 72. A combustion surface 75 is formed on the underside of the combustion body 70. The combustion surface 75 is exposed downward at the opening of the burner flange 72. The mixed gas mixed inside the burner body 71 is supplied to the combustion body 70. The mixed gas burns on the combustion surface 75, forming a flame directed downward.

[0022] A fixing flange 73 is provided on the outer periphery of the burner flange 72. The fixing flange 73 protrudes outward. The fixing flange 73 is a roughly rectangular frame that is long in the left-right direction when viewed from the bottom. The afterburner 7 is attached from above to the support plate 31 of the burner support base 3. The fixing flange 73 is positioned and fixed to the upper surface of the support plate 31. The combustion body 70 is positioned opposite an opening provided in the support plate 31. The combustion surface 75 of the combustion body 70 is positioned facing downward through the opening.

[0023] The structure of the duct body 4 will be described with reference to Figures 4 to 6. As shown in Figure 3, the duct body 4 is connected to the rear of the burner support base 3. The duct body 4 forms the portion of the exhaust duct 10 downstream of the afterburner 7. The duct body 4 is roughly box-shaped with openings on the front and bottom. An exhaust port 49 is provided on the rear end side of the upper surface of the duct body 4. An exhaust passage is formed inside the duct body 4, leading from the open front surface to the exhaust port 49. When the duct body 4 is viewed from the front, a catalyst plate 8 is attached at an angle inside the duct body 4 via a fixing member 20. The catalyst plate 8 is arranged midway through the exhaust passage.

[0024] 5 and 6, the duct body 4 includes a duct front member 41 and a duct rear member 42. The duct front member 41 is generally inverted U-shaped and opens downward when viewed from the front. The duct front member 41 includes an upper wall 43, a right wall 44, a left wall 45, and a front wall 46.

[0025] The upper wall 43 has a generally rectangular shape that is long in the left-right direction in a plan view. A protruding piece 431 is provided at the rear end of the upper wall 43. The protruding piece 431 protrudes diagonally upward from the rear side. The right wall 44 hangs down from the right end of the upper wall 43. The right wall 44 has a fixing hole 441, a pair of locking slits 442, and a fixing piece 443.

[0026] The fixing hole 441 is provided in approximately the center of the upper half of the right wall 44. A pair of locking slits 442 are provided at positions diagonally sandwiching the fixing hole 441 in the center, with the upper locking slit 442 being provided in front of the fixing hole 441 and the lower locking slit 442 being provided behind the fixing hole 441. The fixing piece 443 protrudes to the right from the lower end of the right wall 44. A fixing hole 444 is provided in the fixing piece 443. The fixing piece 443 is fastened to the right end of the upper surface of the duct bottom plate 27 with a screw.

[0027] The left wall 45 hangs down from the left end of the upper wall 43. Like the right wall 44, the left wall 45 has a fixing hole 451, a pair of locking slits 452, and a fixing piece 453. The fixing hole 451 is provided in approximately the center of the upper half of the left wall 45. The pair of locking slits 452 are positioned diagonally across from the fixing hole 451, with the upper locking slit 452 being provided in front of the fixing hole 451 and the lower locking slit 452 being provided behind the fixing hole 451. The fixing piece 453 protrudes leftward from the lower end of the left wall 45. A fixing hole (not shown) is provided in the fixing piece 453. The fixing piece 453 is fastened to the left end of the upper surface of the duct bottom plate 27 with a screw.

[0028] The front wall 46 hangs down from the front end of the upper wall 43 and extends to approximately the middle of the right wall 44 and the left wall 45 in the vertical direction. The front wall 46 has an opening 461 that is rectangular in front view. The lower end of the opening 461 is flush with the lower end of the front wall 46, so the front wall 46 is roughly U-shaped and opens downward in front view. A protruding piece 462 is provided at the upper end of the opening 461. The protruding piece 462 protrudes forward from the upper end of the opening 461. Three fixing holes 463 are provided in the protruding piece 462, at the center, right side, and left side. The positions of these three fixing holes 463 correspond to the positions of the three fixing holes 361 (see Figure 3) provided in the fixing piece 36 of the burner support base 3. The protruding piece 462 is superimposed on the upper surface of the fixing piece 36 of the burner support base 3 and is fastened with three screws.

[0029] The duct rear member 42 is attached to the rear side of the duct front member 41 and forms the rear wall of the duct main body 4. The duct rear member 42 has a generally rectangular shape that is long in the vertical direction when viewed from the front, and has a broken line shape that is bent and inclined forward at different angles in stages from the upper end to the lower side when viewed from the side.

[0030] 7 to 11, the configuration of the fixing member 20 attached to the catalyst plate 8 will be described. As shown in FIG. 7, the catalyst plate 8 is composed of two catalyst plates 8A and 8B. The catalyst plates 8A and 8B are rectangular plates, and are, for example, heat-resistant ceramic plates with a plurality of small holes, on which an oxidation catalyst such as platinum is supported. Hereinafter, the catalyst plates 8A and 8B will be collectively referred to as the catalyst plate 8. Such catalyst plates 8 are heated and activated by the combustion heat of the afterburner 7. When the combustion exhaust gas passes through the catalyst plate 8, the catalyst plate 8 oxidizes the oily smoke in the combustion exhaust, making it odorless and smokeless. In order to fix such catalyst plates 8 within the duct body 4, fixing members 20 are attached to the catalyst plates 8.

[0031] The structure of the fixing member 20 will be described. As shown in Fig. 7, the fixing member 20 includes a first frame 5 and a second frame 6. When the thickness direction of the catalyst plate 8 is oriented in the vertical direction, the first frame 5 is attached to the lower surface side of the catalyst plate 8, and the second frame 6 is attached to the upper surface side of the catalyst plate 8.

[0032] The structure of the first frame 5 will be described. As shown in Fig. 8, the first frame 5 comprises a main body frame 50, a right support wall 51, and a left support wall 52. The main body frame 50 is a rectangular frame that is long in the left-right direction in a plan view, and supports the catalyst plate 8 from below. A rectangular opening 53 is provided in the center of the main body frame 50. The main body frame 50 comprises a flat bar-shaped front side portion 501, a rear side portion 502, a right side portion 503, and a left side portion 504.

[0033] An upwardly protruding locking piece 55 is provided at the front end of the front portion 501. An upwardly protruding locking piece 56 is provided at the rear end of the rear portion 502. A flat bar-shaped bridge plate 54 extending in the front-to-rear direction is provided between the left-to-right intermediate portion of the front portion 501 and the left-to-right intermediate portion of the rear portion 502. A downwardly protruding piece 541 is provided at the right end of the bridge plate 54. A pair of downwardly protruding pieces 505 are provided at the front and rear ends of the left end of the right portion 503 excluding the center. A pair of downwardly protruding pieces 506 are provided at the front and rear ends of the right end of the left portion 504 excluding the center.

[0034] The right support wall 51 is provided in the center in the front-to-rear direction of the right end of the right side portion 503. When the catalyst plate 8 is installed on the upper surface of the main body frame 50, the right support wall 51 protrudes upward above the upper surface of the catalyst plate 8. The right support wall 51 has a generally rectangular shape when viewed from the right side. The right support wall 51 has a burring hole 57, a boss portion 511, a pair of engaging holes 512, and a pair of engaging ribs 513.

[0035] The burring hole 57 is provided in the upper part of the right support wall 51 and in the middle in the front-rear direction, and is located above the upper surface of the catalyst plate 8. The burring hole 57 has a screw hole 571 and a burring portion 572. The screw hole 571 is a round hole. The burring portion 572 is a short-axis cylindrical flange that protrudes to the left from the inner peripheral edge of the screw hole 571. The burring hole 57 is formed by burring. Burring refers to a process of adding a raised portion (flange) around a hole drilled in sheet metal. The width by which the burring portion 572 protrudes from the inner peripheral edge of the screw hole 571 is greater than the thickness width of a right protruding wall 61 of the second frame 6, which will be described later.

[0036] The boss portion 511 is provided on the right support wall 51 directly below the burring hole 57 and is located lower than the underside of the catalyst plate 8. The boss portion 511 is formed by stamping out sheet metal and protrudes leftward from the left surface of the right support wall 51. A pair of engaging holes 512 are provided on both the front and rear sides of the upper part of the right support wall 51, sandwiching the burring hole 57 in the middle. The pair of engaging holes 512 are rectangular. A pair of engaging ribs 513 are provided on the front and rear ends of the right support wall 51 and protrude rightward.

[0037] The left support wall 52 is provided at the center in the front-to-rear direction of the left end of the left side portion 504. The left support wall 52 has a shape symmetrical to the right support wall 51. When the catalyst plate 8 is installed on the upper surface of the main body frame 50, the left support wall 52 protrudes above the upper surface of the catalyst plate 8. The left support wall 52 is provided with a burring hole 58, a boss portion 521, a pair of engaging holes 522, and a pair of engaging ribs 523.

[0038] The burring hole 58 is provided in the upper part of the left support wall 52 and in the middle in the front-to-rear direction, and is located above the upper surface of the catalyst plate 8. The burring hole 58 has a screw hole 581 and a burring portion 582. The screw hole 581 is a round hole. The burring portion 582 is a short-axis cylindrical flange that protrudes to the right from the inner peripheral edge of the screw hole 581. The burring hole 58 is formed by burring processing. The width of the burring portion 582 that protrudes from the inner peripheral edge of the screw hole 581 is greater than the thickness width of the left protruding wall 62 of the second frame 6.

[0039] The structure of the second frame 6 will be described. As shown in Figure 9, the second frame 6 comprises a main body frame 60, a right protruding wall 61, and a left protruding wall 62. The main body frame 60 is a rectangular frame that is long in the left-right direction in a plan view, and supports the catalyst plate 8 from above. A rectangular opening 63 is provided in the center of the main body frame 60. The opening 63 faces the opening 53 of the first frame 5 in the up-down direction, with the catalyst plate 8 interposed between them. The main body frame 60 comprises a flat bar-shaped front side portion 601, a rear side portion 602, a right side portion 603, and a left side portion 604.

[0040] A locking piece 65 protruding downward is provided at the front end of the front portion 601. A locking piece 66 protruding downward is provided at the rear end of the rear portion 602. A flat bar-shaped bridge plate 64 extending in the front-to-rear direction is provided between the left-to-right middle portion of the front portion 601 and the left-to-right middle portion of the rear portion 602. A protruding piece 641 protruding upward is provided at the right end of the bridge plate 64. A pair of protruding pieces 605 protruding upward is provided at the front and rear sides of the left end of the right portion 603 excluding the center. A pair of protruding pieces 606 protruding upward is provided at the front and rear sides of the right end of the left portion 604 excluding the center.

[0041] The right protruding wall 61 is provided in the front-to-rear center of the right end of the right side portion 603 and protrudes upward from this center. The right protruding wall 61 extends in the front-to-rear direction when viewed from the right side, and has a curved portion 611 provided in the front-to-rear center of the upper end. The curved portion 611 protrudes upward in a curved shape. The right protruding wall 61 has a slit 67 and a pair of locking portions 612.

[0042] The slit 67 is provided in the arched portion 611 of the right protruding wall 61 and extends in the vertical direction. The upper end of the slit 67 has a semicircular arc shape that protrudes upward. The slit 67 extends to the lower end of the right protruding wall 61, then bends leftward and extends to the center of the right side portion 603 of the main body frame 60 in the left-right direction. The portion of the slit 67 that extends leftward from the lower end of the right protruding wall 61 is at least longer than the length of the burring portion 572 that protrudes. A pair of locking portions 612 is provided at the upper end of the right protruding wall 61, on both the front and rear sides of the slit 67. The pair of locking portions 612 is formed in a semicircular arc shape that protrudes rightward in a plan view. The pair of locking portions 612 is formed by pressing the upper end of the right protruding wall 61 from left to right into a lower hemispherical shape.

[0043] The left protruding wall 62 is provided in the front-to-rear center of the left end of the left side portion 604 and protrudes upward from this center. The left protruding wall 62 has a symmetrical shape to the right protruding wall 61. A curved portion 621 is provided in the front-to-rear center of the upper end of the left protruding wall 62. The left protruding wall 62 has a slit 68 and a pair of locking portions 622. The slit 68 is provided in the curved portion 621 of the left protruding wall 62 and extends in the up-down direction. The upper end of the slit 68 has a semicircular arc shape that protrudes upward. The slit 68 extends to the lower end of the left protruding wall 62 and then bends to the right, extending to the left-to-right center of the left side portion 604 of the main frame 60. The portion of the slit 68 extending rightward from the lower end of the left protruding wall 62 is at least longer than the length by which the burring portion 582 protrudes.

[0044] 10 and 11, an example of a method for attaching the fixing member 20 to the catalyst plate 8 will be described. As shown in FIG. 10, first, the catalyst plate 8A is placed on the right side of the upper surface of the main body frame 50 of the first frame 5, and the catalyst plate 8B is placed on the left side of the upper surface. In this state, the locking piece 55 abuts against the front surface of each of the catalyst plates 8A and 8B, and the locking piece 56 abuts against the rear surface of each of the catalyst plates 8A and 8B. As a result, the catalyst plates 8A and 8B are positioned on the upper surface of the main body frame 50 in the front-to-rear direction.

[0045] The catalyst plates 8A and 8B are then aligned in the left-right direction and come into contact with each other. In this state, the tip of the boss portion 511 of the right support wall 51 abuts against the right surface of the catalyst plate 8A, and the tip of the boss portion 521 (see FIG. 8) of the left support wall 52 abuts against the left surface of the catalyst plate 8B. Thus, the right support wall 51 supports the right surface of the catalyst plate 8A, and the left support wall 52 supports the left surface of the catalyst plate 8B. In this way, the catalyst plates 8A and 8B are positioned on the top surface of the main body frame 50 in the left-right direction as well. The catalyst plates 8A and 8B are now set on the top surface of the main body frame 50.

[0046] Next, as shown in Figure 10, the second frame 6 is dropped from above onto the first frame 5, which has the catalyst plates 8A and 8B set on the upper surface of the main body frame 50. At this time, the burring portion 572 (see Figure 8) provided on the right support wall 51 of the first frame 5 is inserted from below into the slit 67 in the right protruding wall 61 of the second frame 6. As described above, the slit 67 extends to the right side portion 603 of the main body frame 60, and the portion extending leftward from the lower end of the right protruding wall 61 is at least longer than the protruding length of the burring portion 572. This prevents the burring portion 572 from getting caught on the right side portion 603.

[0047] At the same time, the burring portion 582 (see FIG. 8) provided on the left support wall 52 of the first frame 5 is inserted from below into the slit 68 in the left protruding wall 62 of the second frame 6. As described above, the slit 68 also extends to the left side portion 604 of the main frame 60, and the portion extending rightward from the lower end of the left protruding wall 62 is at least longer than the protruding length of the burring portion 582. This prevents the burring portion 582 from getting caught on the left side portion 604.

[0048] The width of the burring portion 572 that protrudes leftward is greater than the thickness of the right-protruding wall 61, and the width of the burring portion 582 that protrudes rightward is greater than the thickness of the left-protruding wall 62. This allows the burring portions 572, 582 to be reliably inserted into the slits 67, 68. This prevents the burring portions 572, 582 from falling out of the slits 67, 68.

[0049] In this state, when the second frame 6 is dropped onto the first frame 5 side, the burring portions 572, 582 move along the slits 67, 68. Therefore, the second frame 6 is guided correctly towards the first frame 5 side.

[0050] Furthermore, when the second frame 6 is moved toward the first frame 5, the pair of locking portions 612 provided on the right protruding wall 61 of the second frame 6 slide downward on a portion of the left surface of the right support wall 51 of the first frame 5 that is above the pair of locking holes 512. On the other hand, the pair of locking portions 622 provided on the left protruding wall 62 of the second frame 6 slide downward on a portion of the right surface of the left support wall 52 of the first frame 5 that is above the pair of locking holes 522. At this time, the right support wall 51 and the left support wall 52 of the first frame 5 are biased outward in the left-right direction by the pair of locking portions 612 and the pair of locking portions 622, and are therefore elastically deformed so as to open slightly outward.

[0051] Then, when the lower surface of the main body frame 60 of the second frame 6 comes into contact with the upper surfaces of the catalyst plates 8A, 8B, the pair of right-side locking portions 612 fit into the pair of right-side locking holes 512, and the pair of left-side locking portions 622 fit into the pair of left-side locking holes 522. At this time, the right support wall 51 and the left support wall 52 of the first frame 5 return to their original shapes due to the elasticity of the metal sheets. As a result, the pair of right-side locking portions 612 engage with the pair of right-side locking holes 512, and the pair of left-side locking portions 622 engage with the pair of left-side locking holes 522 (see FIG. 11 ). Then, the left surface of the right support wall 51 overlaps with the right surface of the right protruding wall 61, and the right surface of the left support wall 52 overlaps with the left surface of the left protruding wall 62.

[0052] In this manner, the second frame 6 is fixed to the first frame 5 with the catalyst plates 8A, 8B sandwiched between the first frame 5 and the second frame 6. In this state, the locking pieces 65 of the second frame 6 abut against the front ends of the catalyst plates 8A, 8B, respectively, and the locking pieces 66 abut against the rear ends of the catalyst plates 8A, 8B, respectively. This also positions the catalyst plates 8A, 8B against the underside of the main body frame 60 in the front-to-rear direction. Therefore, the catalyst plates 8A, 8B are held in a precisely positioned state between the first frame 5 and the second frame 6.

[0053] Furthermore, the bridge plate 54 of the first frame 5 is positioned to contact both catalyst plates 8A and 8B, blocking the surfaces where the catalyst plates 8A and 8B come into contact with each other. Furthermore, the bridge plate 64 of the second frame 6 is also positioned to contact both catalyst plates 8A and 8B, blocking the surfaces where the catalyst plates 8A and 8B come into contact with each other from the side opposite the first frame 5. This allows the surfaces where the catalyst plates 8A and 8B come into contact with each other to be blocked from both sides in the thickness direction of the catalyst plates 8A and 8B. Therefore, with the catalyst plate 8 with the fixing member 20 attached attached to the duct body 4, the grill device 1 can prevent combustion exhaust gas from inside the grill chamber 2 from being discharged without passing through the holes in the catalyst plates 8A and 8B.

[0054] 4 to 6, an example of a method for attaching the catalyst plate 8 to the duct body 4 will be described. For ease of explanation, when the fixing member 20 is attached to the catalyst plate 8, the surface on the first frame 5 side will be referred to as the front surface of the catalyst plate 8, and the surface on the second frame 6 side will be referred to as the rear surface of the catalyst plate 8.

[0055] 5 and 6, first, with the fixing member 20 attached to the catalyst plate 8, the catalyst plate 8 is inserted into the inside of the duct front member 41. As described above, the duct front member 41 is roughly inverted U-shaped and opens downward when viewed from the front, so the front, rear, and bottom sides of the duct front member 41 are wide open. This makes it easy to insert the catalyst plate 8 into the inside of the duct front member 41 while checking its position.

[0056] Next, with the front surface of the catalyst plate 8 inserted inside the duct front member 41 tilted diagonally downward, the pair of locking ribs 513 provided on the right support wall 51 of the fixing member 20 are locked into the pair of locking slits 442 provided in the right wall 44 of the duct front member 41. Furthermore, the pair of locking ribs 523 (see FIG. 6) provided on the left support wall 52 of the fixing member 20 are locked into the pair of locking slits 452 provided in the left wall 45 of the duct front member 41.

[0057] At this time, the burring hole 57 formed in the right support wall 51 of the fixing member 20 is aligned with the fixing hole 441 formed in the right wall 44 of the duct front member 41. The burring hole 58 formed in the left support wall 52 of the fixing member 20 is aligned with the fixing hole 451 formed in the left wall 45 of the duct front member 41. Then, a screw 92 is inserted from the right into the fixing hole 441 of the right wall 44 and fastened to the burring hole 57 of the right support wall 51. Furthermore, a screw 92 is inserted from the left into the fixing hole 451 of the left wall 45 and fastened to the burring hole 58 of the left support wall 52. In this way, the catalyst plate 8 can be easily attached in the above-described inclined position via the fixing member 20 inside the duct front member 41. Then, the duct rear member 42 is attached to the duct front member 41 from the rear, thereby completing the assembly of the duct main body 4 (see FIG. 4).

[0058] As described above, burring holes 57, 58 are formed in the right support wall 51 and the left support wall 52 of the first frame 5, and the duct body 4 and the first frame 5 are fixed with screws 92, 92. In contrast, the second frame 6 is not fixed to the duct body 4 with screws, but is fixed to the first frame 5 by a pair of locking portions 612 and a pair of locking portions 622 formed on the right protruding wall 61 and the left protruding wall 62 engaging with a pair of locking holes 512 and a pair of locking holes 522 formed in the right support wall 51 and the left support wall 52 of the first frame 5.

[0059] The reason for this is that if the second frame 6 were fixed to the duct body 4 with screws, the second frame 6 would rotate when the screws were tightened, which could result in a gap between the catalyst plate 8 and the second frame 6. In this embodiment, the fixing structure described above makes it easy to fix the first frame 5 and second frame 6 in the assembled state inside the duct body 4, and also allows the catalyst plate 8 to be attached with high precision.

[0060] The flow of combustion exhaust gas within exhaust duct 10 will be described with reference to Figure 12. The combustion exhaust gas that flows into exhaust duct 10 from inside grill chamber 2 via communication port 9 flows directly below combustion surface 75 of afterburner 7. Afterburner 7 burns and eliminates oily smoke contained in the combustion exhaust gas. The combustion exhaust gas that flows rearward directly below combustion surface 75 of afterburner 7 is then pushed out into duct body 4 and quickly diffuses vertically.

[0061] The catalyst plate 8 is supported in the duct body 4 in an inclined position with its front surface facing diagonally downward. This allows the front surface of the catalyst plate 8 to face the combustion exhaust flowing diagonally upward from the combustion surface 75 of the afterburner 7. This allows the combustion exhaust to pass smoothly through the porous interior of the catalyst plate 8, preventing the grill apparatus 1 from excessively increasing exhaust resistance within the exhaust duct 10.

[0062] The catalyst plate 8 is then heated and activated by the heat of combustion from the afterburner 7. Within the duct body 4, the combustion exhaust diffuses vertically and comes into uniform contact with the catalyst plate 8. As the combustion exhaust passes through the catalyst plate 8, the oily smoke in the combustion exhaust is oxidized, making it odorless and smokeless. The combustion exhaust that has passed through the catalyst plate 8 and become odorless and smokeless is then discharged out of the exhaust duct 10 through the exhaust port 49.

[0063] In this exhaust duct 10, the catalyst plate 8 is supported in the above-mentioned inclined position within the duct body 4. This allows the grill device 1 to bring the front surface of the catalyst plate 8 close to the combustion surface 75, while facing the combustion surface 75. This allows the grill device 1 to efficiently heat the catalyst plate 8 using the combustion heat of the afterburner 7, further improving the oily smoke dissipation effect of the catalyst plate 8.

[0064] In the above description, the main body frame 50 of the first frame 5 is an example of a "first main body portion" of the present invention, and the opening 53 is an example of a "first opening" of the present invention. The main body frame 60 of the second frame 6 is an example of a "second main body portion" and "frame portion" of the present invention, and the opening 63 is an example of a "second opening" of the present invention. The fixing hole 441 in the right wall 44 of the duct main body 4 and the fixing hole 451 in the left wall 45 are examples of a "duct-side fixing hole" of the present invention.

[0065] As explained above, the grill device 1 of this embodiment is equipped with the exhaust duct 10. The exhaust duct 10 discharges the combustion exhaust gas flowing from inside the grill chamber 2 to the outside of the grill chamber 2. The catalyst plate 8 is fixed inside the exhaust duct 10 by a fixing member 20. The fixing member 20 comprises a first frame 5 and a second frame 6. If the thickness direction of the catalyst plate 8 is assumed to be the up-down direction, the first frame 5 is attached from the underside of the catalyst plate 8, and the second frame 6 is attached from the top side of the catalyst plate 8. In this way, the fixing member 20 supports the catalyst plate 8 on the inside with the first frame 5 and the second frame 6 combined with each other.

[0066] The first frame 5 includes a main body frame 50, a right support wall 51, and a left support wall 52. The main body frame 50 supports the catalyst plate 8 from below and has an opening 53 facing the catalyst plate 8. The right support wall 51 and the left support wall 52 protrude above the upper surface of the catalyst plate 8 from both left and right ends of the main body frame 50, and support the right and left faces of the catalyst plate 8 from both the left and right sides, respectively.

[0067] The second frame 6 includes a main body frame 60, a right protruding wall 61, and a left protruding wall 62. The main body frame 60 supports the catalyst plate 8 from above and has an opening 63 that faces the opening 53 across the catalyst plate 8. The right protruding wall 61 and the left protruding wall 62 protrude upward from both left and right end portions of the main body frame 60 and face the inner surfaces of the right support wall 51 and the left support wall 52 above the top surface of the catalyst plate 8.

[0068] The right protruding wall 61 of the second frame 6 has a slit 67 and a pair of locking portions 612. The left protruding wall 62 has a slit 68 and a pair of locking portions 622. The slits 67, 68 extend in the vertical direction. The pair of locking portions 612 protrude on both the front and rear sides of the slit 67 and on the side opposite the opening 63. The pair of locking portions 622 protrude on both the front and rear sides of the slit 68 and on the side opposite the opening 63.

[0069] The right support wall 51 of the first frame 5 has a burring hole 57 and a pair of engaging holes 512. The left support wall 52 has a burring hole 58 and a pair of engaging holes 522. The burring hole 57 has a screw hole 571 and a burring portion 572. The screw hole 571 overlaps with a fixing hole 441 provided in the right wall 44 of the exhaust duct 10 and is fastened with a screw 92. The burring portion 572 protrudes from the inner peripheral edge of the screw hole 571 toward the center in the left-right direction. The pair of engaging holes 512 are provided on both the front and rear sides of the burring hole 57 and at positions corresponding to the pair of engaging portions 612.

[0070] Burring hole 58 includes a screw hole 581 and a burring portion 582. Screw hole 581 overlaps with fixing hole 451 provided in left wall 45 of exhaust duct 10 and is fastened with a screw 92. Burring portion 582 protrudes from the inner peripheral edge of screw hole 581 toward the center in the left-right direction. A pair of engaging holes 522 are provided on both the front and rear sides of burring hole 58 and at positions corresponding to the pair of engaging portions 622.

[0071] The burring portions 572, 582 of the burring holes 57, 58 formed in the right support wall 51 and the left support wall 52 of the first frame 5 are inserted into the slits 67, 68 formed in the corresponding right protruding wall 61 and left protruding wall 62 of the second frame 6. In this state, the second frame 6 is pressed toward the first frame 5, whereby the second frame 6 is guided toward the first frame 5 by the slits 67, 68 and the burring portions 572, 582. Then, the pair of locking portions 612 fits into the pair of locked holes 512, and the pair of locking portions 622 fits into the pair of locked holes 522.

[0072] This makes it possible to easily attach the fixing member 20 to the catalyst plate 8. Furthermore, the burring holes 57, 58 used to fix the fixing member 20 inside the exhaust duct 10 are also used as a structure for guiding the second frame 6 toward the first frame 5. Therefore, there is no need to provide a separate guide structure in the fixing member 20, which saves manufacturing costs and prevents the shape of the fixing member 20 from becoming complicated.

[0073] The main frame 60 of the second frame 6 has an opening 63 in the center. The slits 67, 68 extend to the right side 603 and left side 604 of the main frame 60. The width of the burring portions 572, 582 protruding from the inner peripheral edges of the screw holes 571, 581 is greater than the thickness of the right protruding wall 61 and the left protruding wall 62. Because the slits 67, 68 extend to the main frame 60, the burring portions 572, 582 are prevented from getting caught on the second frame 6 when the second frame 6 is dropped onto the first frame 5. Furthermore, because the burring portions 572, 582 can be accommodated, even if they protrude beyond the thickness of the right protruding wall 61 and the left protruding wall 62, the burring portions 572, 582 are prevented from falling off the slits 67, 68. Therefore, the grill device 1 can more stably support the catalyst plate 8 within the exhaust duct 10.

[0074] The present invention is not limited to the above embodiment, and various modifications are possible. The above embodiment is a grill device 1, but the present invention can also be applied to any cooking device equipped with a grill chamber 2, such as a table stove or a built-in stove.

[0075] In the above embodiment, the grill burners in the grill chamber 2 are composed of the upper burner 21 and a pair of left and right lower burners 23, 24, but for example, the upper burner 21 may be omitted.

[0076] In the above embodiment, the catalyst plate 8 is attached to the fixing member 20 and then installed inside the duct body 4, but the installation structure inside the duct body 4 may be a structure other than that of the above embodiment. The fixing member 20 is composed of the first frame 5 and the second frame 6, but the catalyst plate may also be fixed to a single frame.

[0077] The catalyst plate 8 is rectangular, but may have other shapes. The catalyst plate 8 is made up of two catalyst plates 8A and 8B, but may also be made up of one or more plates.

[0078] The pair of locking holes 512 provided in the right support wall 51 of the first frame 5 and the pair of locking holes 522 provided in the left support wall 52 are both rectangular, but may be other shapes. The boss portion 511 provided in the right support wall 51 and the boss portion 521 provided in the left support wall 52 may be omitted. [Explanation of symbols]

[0079] 1 Grilling device 2 Grill compartment 5 First frame 6 Second Frame 8 Catalyst Plate 10 Exhaust duct 20 Fixing member 50 Main frame 51 Right support wall 52 Left support wall 53 Opening 57,58 Burring holes 60 Main frame 61 Right protruding wall 62 Left protruding wall 63 Opening 67,68 Slit 92 bis 512,522 Locked hole 571,581 screw holes 572,582 Burring section 612,622 Locking part

Claims

1. A cooking device having an exhaust duct that discharges combustion exhaust gas flowing from inside a grill chamber to the outside of the grill chamber, and a catalyst plate fixed in the exhaust duct by a fixing member, Assuming that the thickness direction of the catalyst plate is the up-down direction, The fixing member is a first frame attached to the underside of the catalyst plate; a second frame attached to the upper side of the catalyst plate; Equipped with The catalyst plate is supported on the inside when the first frame and the second frame are combined with each other, The first frame is a first body portion that supports the catalyst plate from below and has a first opening that faces the catalyst plate; a right support wall and a left support wall that protrude from both left and right ends of the first main body portion above an upper surface of the catalyst plate and support the right and left surfaces of the catalyst plate from both sides in the left-right direction, respectively; Equipped with The second frame is a second body portion that supports the catalyst plate from above and has a second opening that faces the first opening with the catalyst plate interposed therebetween; a right protruding wall and a left protruding wall that protrude upward from both left and right end portions of the second main body portion and overlap with the inner surfaces of the right support wall and the left support wall above the upper surface of the catalyst plate; Equipped with The right protruding wall and the left protruding wall are a slit extending in the vertical direction; a pair of locking portions projecting on the front and rear sides of the slit opposite to the second opening; Equipped with The right support wall and the left support wall are a burring hole including a screw hole overlapping a duct-side fixing hole provided in the exhaust duct and fastened with a screw, and a burring portion protruding from an inner peripheral edge of the screw hole toward the center in the left-right direction; a pair of engaging holes provided on both the front and rear sides of the burring hole at positions corresponding to the engaging portions; Equipped with When the second frame is pressed toward the first frame in a state in which the burring portions of the burring holes provided in each of the right support wall and the left support wall are inserted into the slits provided in the corresponding right protruding wall and the left protruding wall, the second frame is guided toward the first frame by the slits and the burring portions, and the locking portions fit into the locked holes. A heating and cooking device characterized by the above.

2. the second main body portion includes a frame portion having the second opening at its center, The slit extends to the frame portion, The protruding width of the burring portion is greater than the thickness width of each of the right protruding wall and the left protruding wall. The heating and cooking device according to claim 1 .

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