Trolley for cooking and oven system having same

Abstract

A trolley for cooking and an oven system having same are disclosed. The trolley for cooking, according to an embodiment of the present invention, comprises: a rack assembly having multiple guide tracks so that multiple cooking shelves can be stacked and accommodated; a base assembly which supports the rack assembly and has a wheel so as to be movable; and a rotation assembly formed to rotate the rack assembly on the base assembly while coupling the base assembly and the rack assembly.

Description

Cooking trolley and oven system equipped therewith

[0001] The present invention relates to a cooking trolley and an oven system equipped therewith. More specifically, the present invention relates to a technical concept that enables the entire rack assembly at the top of a cooking trolley to rotate, thereby enabling balanced cooking without the need to individually rotate the cooking racks.

[0002]

[0003] Typically, when using a commercial oven or an oven for large-scale cooking, cooking is performed by introducing a trolley formed so that cooking shelves can be stacked in multiple layers into the oven's cooking chamber, closing the oven door, and spraying steam or hot air inside for a certain period of time.

[0004] If steam or hot air is evenly applied to each cooking rack, the food can be cooked evenly, but in reality, there is a problem in which relatively more steam or hot air is applied to one side of the cooking rack.

[0005] Therefore, to solve this problem, the cook temporarily stops the oven while cooking, withdraws the trolley outside the cooking chamber, and then removes the cooking racks one by one from the trolley's guide tracks, rotates them 180 degrees in the opposite direction, and then puts them back onto the guide tracks. Then, he returns the trolley to the cooking chamber and restarts the stopped oven, thereby completing the cooking process.

[0006] This requires a significant amount of manual labor during cooking, extending cooking times and ultimately impacting food quality. This problem is exacerbated by the increased number of cooking racks.

[0007]

[0008] - Prior art literature

[0009] * Patent literature

[0010] (Patent Document 0001) Korean Registered Patent (Registration No. 10-1510424, "Horizontal Maintaining Device for Trolley for Commercial Oven or Warmer")

[0011]

[0012] The problem to be solved by the present invention is to provide a technical idea for a trolley and an oven system equipped with the trolley, which can change the direction of all stacked shelves at once by allowing the rack assembly of the trolley to rotate.

[0013]

[0014] According to one embodiment of the present invention, a cooking trolley includes a rack assembly having a plurality of guide tracks so that a plurality of cooking shelves can be stacked and stored, a base assembly having wheels to support the rack assembly and enable movement, and a rotation assembly formed to rotate the rack assembly on the base assembly while coupling the base assembly and the rack assembly, wherein the rotation assembly includes a rotation axis so that the rack assembly can rotate around the rotation axis, and the rotation axis includes an inclined region with an inclined side and a vertical region extending above or below the inclined region and having a vertical side.

[0015] The above rotation assembly may include a rotation support formed on the base assembly and having an insertion portion into which the rotation shaft can be inserted, a lower assembly including the rotation shaft, and a rotation coupling portion coupled to the lower portion of the rack assembly and coupled to the rotation support so that the rack assembly is rotationally coupled to the base assembly.

[0016] The above-mentioned rotary joint includes a rotary rod that rotates about the rotary shaft and has an internal hole formed therein so that the upper portion of the rotary shaft can be fitted therein, and the internal hole of the rotary rod may include an inclined region with an inclined side surface corresponding to the shape of the rotary shaft and a vertical region with a vertical side surface that extends above or below the inclined region.

[0017] The above rack assembly includes vertical rack frames having a predetermined length in the height direction of the rack assembly, a plurality of guide tracks connecting any two of the vertical rack frames and protruding inwardly of the rack assembly so that one end of a cooking shelf can be slidably inserted, and a ball house coupled to the lower end of at least one of the vertical rack frames and in contact with the upper frame of the base assembly to support at least one of the vertical rack frames and having a ball that rolls when the rack assembly rotates.

[0018] The ball house may include a lower cover in which a lower groove is formed to accommodate the ball, a lower protrusion formed at the lower end to accommodate a portion of the ball, a lower protrusion formed to be smaller than the diameter of the ball, and a lower groove having a region having a curvature smaller than the curvature of the ball so that the ball can move up and down within the lower groove by a certain distance, and an upper cover in which an upper groove is formed to accommodate a portion of the ball and an upper protrusion formed at the upper end to allow a portion of the ball to protrude.

[0019] According to another embodiment of the present invention, a cooking trolley includes a rack assembly in which a plurality of cooking shelves are stacked and stored, vertical rack frames having a predetermined length in the height direction of a rack assembly, a plurality of guide tracks connecting any two of the vertical rack frames and protruding inwardly of the rack assembly so that one end of the cooking shelf can be slidably inserted, and a ball house coupled to the lower end of at least one of the vertical rack frames and in contact with an upper frame of a base assembly to support at least one of the vertical rack frames while having a ball that rolls when the rack assembly rotates, a base assembly having wheels to support and move the rack assembly, and a rotation assembly formed to rotate the rack assembly on the base assembly while coupling the base assembly and the rack assembly.

[0020] An oven system according to one embodiment of the present invention includes an oven and a cooking trolley that can be introduced into or withdrawn from a cooking chamber of the oven, the cooking trolley including a rack assembly having a plurality of guide tracks so that a plurality of cooking shelves can be stacked and stored, a base assembly having wheels to support the rack assembly and enable movement, and a rotation assembly formed to rotate the rack assembly on the base assembly while coupling the base assembly and the rack assembly, the rotation assembly including a rotation axis so that the rack assembly can be rotated around the rotation axis, the rotation axis including an inclined region having an inclined side and a vertical region extending above or below the inclined region and having a vertical side.

[0021] According to another embodiment of the present invention, an oven system includes an oven and a cooking trolley that can be introduced into or withdrawn from a cooking chamber of the oven, the cooking trolley includes a rack assembly including vertical rack frames having a predetermined length in a height direction of a rack assembly in which a plurality of cooking shelves are stacked and stored, the plurality of guide tracks connecting any two of the vertical rack frames and protruding inwardly of the rack assembly so that one end of the cooking shelf can be slidably inserted, and a ball house that is coupled to the lower end of at least one of the vertical rack frames and contacts an upper frame of a base assembly to support at least one of the vertical rack frames while having a ball that rolls when the rack assembly rotates, a base assembly having wheels to support and move the rack assembly, and a rotation assembly that is formed so as to rotate the rack assembly on the base assembly while coupling the base assembly and the rack assembly.

[0022]

[0023] A cooking trolley and an oven system having the same according to an embodiment of the present invention are formed so that a rack assembly of a trolley on which cooking shelves are stacked can rotate, and the rotation of the rack assembly has the effect of changing the direction of all shelves stacked on the rack assembly at once.

[0024] This increases safety by eliminating the need to manually pull the high-temperature cooking rack out of the rack assembly and then change its direction to re-insert it. In addition, the entire cooking rack can be changed in a short period of time, preventing unnecessary extension of cooking time and ultimately improving cooking quality.

[0025] In addition, by combining a ball house at the bottom of the rack assembly, there is an effect that allows the rack assembly to be stably supported on the base assembly through the ball house while easily rotating on the base assembly.

[0026] Additionally, the internal hole of the rotating shaft and the unique shape of the rotating shaft provide a stable connection while making insertion and withdrawal easy.

[0027]

[0028] In order to more fully understand the drawings cited in the detailed description of the present invention, a brief description of each drawing is provided.

[0029] Figure 1 shows a schematic three-dimensional drawing of a cooking trolley and an oven body according to an embodiment of the present invention.

[0030] Figures 2 and 3 are drawings for explaining a rack assembly according to an embodiment of the present invention.

[0031] FIGS. 4 to 7 are drawings for explaining a rotating assembly according to an embodiment of the present invention.

[0032] FIG. 8 is a drawing for explaining a base assembly according to an embodiment of the present invention.

[0033] FIG. 9 is a drawing for explaining the rotation of a rack assembly according to an embodiment of the present invention.

[0034] Figures 10 and 11 are drawings for explaining a ball house according to an embodiment of the present invention.

[0035]

[0036] The present invention is susceptible to various modifications and embodiments, and specific embodiments are illustrated and described in detail in the drawings. However, this is not intended to limit the present invention to specific embodiments, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present invention. In describing the present invention, detailed descriptions of related known technologies will be omitted if they are deemed to obscure the gist of the present invention.

[0037] Terms such as first, second, etc. may be used to describe various components, but these components should not be limited by these terms. These terms are used solely to distinguish one component from another.

[0038] The terminology used in this application is solely for the purpose of describing specific embodiments and is not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

[0039] In this specification, terms such as “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but should be understood not to exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0040] Hereinafter, the present invention will be described in detail, focusing on embodiments thereof, with reference to the attached drawings. The same reference numerals in each drawing represent the same components.

[0041] Figure 1 shows a schematic three-dimensional drawing of a cooking trolley and an oven body according to an embodiment of the present invention.

[0042] Referring to FIG. 1, an oven system according to the technical idea of ​​the present invention may include an oven (1) and a cooking trolley (10).

[0043] The above cooking trolley (10) may have a structure in which a plurality of guide tracks are stacked vertically so that cooking shelves (2) can be stacked. After placing ingredients on the cooking shelves (2), the cooks insert the cooking shelves (2) into the guide tracks of the cooking trolley (10), insert the cooking trolley into the cooking chamber of the oven (1), close the door, and begin cooking.

[0044] For example, the oven (1) may be a steam convection oven, but the technical idea of ​​the present invention can be applied to various types of ovens regardless of the heating method (e.g., electric, convection, light wave, etc.) of the oven (1). Hereinafter, a case where the oven (1) is a steam convection oven will be described as an example, but the scope of the present invention is not limited thereto.

[0045] Steam convection ovens are designed to inject steam into the cooking chamber. This allows for controlled humidity within the cooking chamber based on the amount of steam. This prevents food from drying out, enabling large-scale cooking. Furthermore, they prevent the evaporation of flavor and aroma, preserving the flavor and aroma of the dish. This device is widely used in homes and commercial settings. Steam or hot air is evenly distributed throughout the cooking chamber via convection.

[0046] However, as described above, no matter how evenly one tries to distribute steam or hot air within the cooking chamber, there is a limit, and this problem becomes more severe as the cooking chamber of the oven (1) becomes larger.

[0047] Therefore, as described above, in the past, cooks would temporarily stop the operation of the oven (1) while it was in operation, open the door of the oven (1), and then withdraw the cooking trolley (10) from the cooking chamber of the oven (1). Then, they would withdraw the cooking shelves (2) one by one from the guide track, change their direction (by rotating them by 180 degrees), and then reinsert them into the guide track. After performing this process for all the cooking shelves (2), the cooking trolley (10) would be reinserted into the cooking chamber of the oven (1), the door would be closed, and the stopped operation would be resumed.

[0048] In order to solve these inconveniences and problems, the cooking trolley (10) according to the technical idea of ​​the present invention discloses a technical idea that enables the rack assembly itself, which can be stacked on the cooking shelf (2), to rotate on the base assembly.

[0049] Figures 2 and 3 are drawings for explaining a rack assembly according to an embodiment of the present invention.

[0050] FIG. 2 is a drawing for explaining a rack assembly (100) of a cooking trolley (10), and FIG. 3 shows a front view of the rack assembly (100), wherein the rack assembly (100) includes a plurality of guide tracks (120) on which a plurality of cooking shelves (2) can be stacked.

[0051] More specifically, the rack assembly (100) includes a plurality of guide tracks (120) that are formed to be slidably inserted so that one end of a cooking shelf (2) can be inserted or placed while connecting two of the vertical rack frames (110) having a predetermined length in the height direction, i.e., two vertical rack frames formed on the same side (e.g., left or right) based on the entry direction of the cooking trolley (100) among the vertical rack frames (110). The plurality of guide tracks (120) may be formed to protrude inwardly of the rack assembly (100).

[0052] The above rack assembly (100) may also further include lower rack frames (111) and upper rack frames (112).

[0053] The above rack assembly (100) may be formed such that the vertical rack frames (110), lower rack frames (111), and upper rack frames (112) have a rectangular parallelepiped shape, but is not limited thereto.

[0054] The guide tracks (120) are installed on both sides so as to face each other, and it will be easy for an average expert in the technical field of the present invention to infer that both ends of the cooking shelf (2) can be inserted into the guide tracks (120) on both sides, respectively.

[0055] In addition, a separation prevention bar (130) may be provided at the front and rear of the rack assembly (100) to prevent the cooking shelf (2) from coming off the guide track (120), and the separation prevention bar (130) may be rotatably coupled to at least one of the vertical rack frames (110) so that it can be closed and opened toward the inside of the rack assembly (100).

[0056] As illustrated in FIG. 2, the anti-separation bar (130) can be installed in both the front and rear directions (based on the entry direction) of the rack assembly (100). This is because, according to the technical concept of the present invention, the rack assembly (100) can be rotated on the base assembly (300), and thus the cooking shelf (2) can be introduced from the front or rear of the rack assembly (100).

[0057] Meanwhile, a rotation coupling part (210), which is part of a rotation assembly (200), may be formed at the bottom of the rack assembly (100). A detailed description of the rotation coupling part (210) will be provided later.

[0058] Additionally, at least one of the vertical rack frames (110) may be provided with a locking device (140) that selectively allows the rack assembly (100) to rotate on the base assembly (300) or prevents it from rotating further.

[0059] The above fixing device (140) is formed at a predetermined position below at least one of the vertical rack frames (110) as shown in FIG. 2 or FIG. 3, and the fixing rod (141) provided in the fixing device (140) can be installed at a position where it can move to a fixing plate (370) formed at a position lower than the lower end of the rack assembly (100).

[0060] In the embodiment of FIG. 2, the fixing device (140) including the fixing rod (141) is installed in the rack assembly (100) and the fixing plate (370) is installed in the base assembly (300), but depending on the embodiment, the opposite may be implemented.

[0061] For example, the fixing device (140) may include a fixing rod (141) that can be selectively inserted into and withdrawn from a fixing plate (370) installed in the base assembly (300). The fixing rod (141) may be implemented so as to be able to move up and down through a predetermined path formed inside the fixing device (140).

[0062] For example, when the fixing rod (141) is introduced into the fixing plate (370), the rack assembly (100) may no longer rotate, and when the fixing rod (141) is pulled out of the fixing plate (370) and fixed in a predetermined manner, the rack assembly (100) may become rotatable again.

[0063] The embodiment of the above fixing device (140) may vary, and in any case, it is sufficient if it is implemented so that the rack assembly (100) can be selectively rotated on the base assembly (300) or rotation can be blocked.

[0064] In addition, the fixing device (140) may be provided with a first fixing device (140) and a second fixing device (140-1) as illustrated in FIG. 2. Accordingly, after the rotation of the rack assembly (100) is blocked using the first fixing device (140), when rotation is desired, the rack assembly (100) may be rotated by a desired amount (e.g., 180 degrees), and at this time, the rotation of the rack assembly (100) may be blocked using the second fixing device (140-1). Of course, the second fixing device (140-1) may also be provided with a second fixing rod (141-1).

[0065] Meanwhile, the rack assembly (100) may include at least one ball house (150). For example, a ball house (150) may be coupled to the lower end of at least one of the vertical rack frames (110).

[0066] The ball house (150) may be configured to support the vertical rack frames (110) that are coupled to the base assembly (300) by contacting the base assembly (300) when the rack assembly (100) is coupled to the base assembly (300). The ball house (150) includes a ball, and the ball may contact a predetermined position of the base assembly (300). When the rack assembly (100) rotates while the ball is in contact with the upper predetermined position of the base assembly (300), the ball may roll to allow the rack assembly (100) to rotate smoothly.

[0067] That is, the ball house (150) may be configured to support the rack assembly (100) while allowing the rack assembly (100) to easily rotate on the base assembly (300). If the ball house (150) is not provided, when the rack assembly (100) and the base assembly (300) are combined, the rack assembly (100) may be in full contact with the upper end of the base assembly (300) or may be spaced apart from it by a predetermined gap. However, in the former case, in order to rotate the rack assembly (100), the rack assembly (100) must be slightly lifted upwards and then rotated. However, this requires a very large force when a plurality of cooking objects and cooking shelves (2) are stacked on the rack assembly (100). In addition, in the latter case, the rack assembly (100) may shake when combined, which poses a safety issue.

[0068] Accordingly, the ball house (150) may be provided to enable the rack assembly (100) to be easily rotated on the base assembly (300) while maintaining the stable connection between the rack assembly (100) and the base assembly (300).

[0069] In one example, the ball house (150) may be coupled to the lower portions of four vertical rack frames (110), respectively. Furthermore, each of the vertical rack frames (110) may be implemented as a hollow tube, in which case the ball house (150) may be fitted into the interior of the tube and coupled to each of the vertical rack frames (110). A specific implementation example of the ball house (150) will be described in detail later with reference to FIGS. 10 and 11.

[0070] A rotation coupling part (210) included in a rotation assembly (200 of FIG. 4) may be formed at the lower portion of the rack assembly (100). The rotation assembly (200) may be configured to rotate the rack assembly (100) on the base assembly (300) while coupling the rack assembly (100) and the base assembly (300).

[0071] The above-described rotation assembly (200) may include a lower assembly (220, 221) including a rotation coupling portion (210), a rotation shaft (211), and a rotation support (220 in FIG. 5). In one example, the rotation coupling portion (210) may be coupled to the rack assembly (100), and the rotation support portion (220) may be coupled to the base assembly (300), but the present invention is not limited thereto, and a person skilled in the art will readily appreciate that the manner in which the rotation assembly (200) is coupled to the rack assembly (100) and the base assembly (300) may vary.

[0072] The above rack assembly (100) can be rotatably coupled to a base assembly (300) equipped with wheels to support and move the rack assembly (100) through a rotation assembly (200), and an example of this will be described with reference to FIGS. 4 to 7.

[0073] FIGS. 4 to 7 are drawings for explaining a rotating assembly according to an embodiment of the present invention. FIG. 4 is a drawing showing a form in which a rack assembly (100) and a base assembly (300) are coupled through a rotating assembly (200), and FIG. 5 is a drawing showing a case in which the rack assembly (100) and the base assembly (300) are disassembled. In addition, FIG. 6 is an assembly drawing of the rotating assembly (200), and FIG. 7 is a drawing showing an exploded view of the rotating assembly (200).

[0074] Referring to FIGS. 4 to 7, a cooking trolley (10) according to an embodiment of the present invention includes a rack assembly (100), a base assembly (300), and a rotation assembly (200) that rotatably connects the rack assembly (100) and the base assembly (300).

[0075] The above rotation assembly (200) may include a lower assembly (220, 221) including a rotation coupling (210), a rotation support (220), and a rotation shaft (211).

[0076] As described above, according to an embodiment of the present invention, the rotation coupling part (210) can be coupled to the lower part of the rack assembly (100), and the lower assembly can be coupled with the lower assembly (220, 221) provided in the base assembly (300).

[0077] As an example, the lower assembly (220, 221) may be formed on the upper portion of the base assembly (300) and may be configured to be coupled with a rotational coupling member (210).

[0078] The rotary support (220) may be provided with an insertion portion (221) into which the rotary shaft (211) can be inserted and fixed. The insertion portion (221) may be implemented as a groove into which the rotary shaft (211) can be inserted or a through hole through which the lower portion of the rotary shaft (211) can pass.

[0079] The rotation coupling part (210) is coupled to the lower part of the rack assembly (100) and is coupled to the rotation shaft (211) coupled to the rotation support (220) so that the rack assembly (100) is rotationally coupled to the base assembly (300).

[0080] As shown in FIGS. 5 and 6, a rotation support (220) and a rotation coupling (210) can be combined to form a rotation assembly (200).

[0081] The rotating joint (210) may include a rotating plate (212) and a rotating rack (213). In addition, a rotating rod (215) and a rotating rod cover (214) may be included in the rotating joint (210).

[0082] The above rotation axis (211) can be inserted into and fixed to the insertion portion (221) formed in the rotation support (220).

[0083] The above rotation shaft (211) may be formed so that the diameters of the upper rotation shaft (211-3) and the lower rotation shaft (211-1) are different, as shown in FIG. 7a or FIG. 7b, and the rotation plate (211) may be supported through a step (211-2) between the upper rotation shaft (211-3) and the lower rotation shaft (211-1).

[0084] In addition, the upper rotation shaft (211-3) protrudes upward through the through hole of the rotation plate (212), and the upper rotation shaft (211-3) can be fitted and assembled in a state where the rotation rod (215) and the rotation rod cover (214) are combined. The rotation rod (215) and the rotation rod cover (214) can be fitted and assembled to the upper part of the rotation shaft (211), that is, the upper rotation shaft (211-3), in a state where they are pre-pressed and assembled, and the rotation rod (215) and the upper rotation shaft (211-3) can be protected through the rotation rod cover (214). In addition, the lower rotation shaft (211-1) can be fixedly coupled by being fitted into the insertion part (221) of the rotation support (220).

[0085] Through this, the rotary shaft (215) and the rotary plate (212) can be formed to rotate in sync. The method of coupling the rotary shaft (211) and the rotary rod (215) is not limited to this, and a person of average skill in the art of the present invention will be able to easily infer that various embodiments are possible.

[0086] Meanwhile, the embodiment illustrated in FIG. 7a exemplifies a case where both the side surface of the vertical cross-section of the upper rotation shaft (211-3) and the side surface of the vertical cross-section of the hole formed inside the rotation rod (215) are formed vertically, that is, the hole inside the upper rotation shaft (211-3) and the rotation rod (215) are both cylindrical in shape. In this case, the diameter of the internal hole of the rotation rod (215) must be slightly larger than the diameter of the upper rotation shaft (211-3) to enable fitting assembly.

[0087] However, due to the gap between the diameter of the internal hole of the rotating rod (215) and the diameter of the upper rotating shaft (211-3), the entire rack assembly (100) creaks or shakes horizontally, which causes a problem in the stability of the combined state. In order to solve this problem, it is desirable to reduce the gap as much as possible. In such a case, the rotating rod (215) must be inserted or withdrawn (lifted) from or into the rotating shaft (211) exactly vertically to enable insertion or withdrawal, and if the insertion or withdrawal angle is even slightly twisted, a problem occurs in which the insertion or withdrawal does not proceed properly.

[0088] In particular, the above-mentioned rotary shaft (215) may be implemented as an integral part with the above-mentioned rack assembly (100), and the rack assembly (100) and the base assembly (300) may frequently need to be separated by the user for reasons such as cleaning the above-mentioned rack assembly (100). Therefore, it may not be easy to lift or lower the relatively heavy rack assembly (100) exactly vertically to the upper rotation shaft (211-3), which may cause a problem in which usability is significantly reduced.

[0089] Therefore, in order to solve these problems, the rotating rod (215) and the rotating shaft (211) can be implemented to have technical characteristics as shown in FIG. 7b.

[0090] Referring to Fig. 7b, the rotation axis (211) may include a region having a truncated cone shape formed such that the side surface is inclined. The region may be formed on the upper rotation axis (211-3).

[0091] For example, as illustrated in Fig. 7b, the upper rotation shaft (211-3) may be implemented to have a truncated cone shape. That is, the upper rotation shaft (211-3) has a shape in which the diameter increases from the top to the bottom, and thus the side surface of the upper rotation shaft (211-3) may have a predetermined slope.

[0092] And the hole inside the above-mentioned rotary shaft (215) can also be implemented to have a cone shape with the same shape as the upper rotary shaft (211-3), i.e., a shape with inclined sides.

[0093] When the internal holes of the above-described rotary shaft (211) and the above-described rotary rod (215) have such shapes, when the above-described rotary shaft (211) and the above-described rotary rod (215) are fitted together, no gap occurs, so that a very stable combined state can be maintained. In addition, even when the rack assembly (100) is vertically pulled out or inserted downward together with the above-described rotary rod (215), there is an effect of easy pull-out or insertion even if it is not pulled out or inserted exactly vertically.

[0094] The lower and upper diameters of the hole inside the above-mentioned rotary shaft (215) may be substantially the same as the lower and upper diameters of the above-mentioned upper rotary shaft (211-3). Alternatively, even if the lower and upper diameters of the hole inside the above-mentioned rotary shaft (215) are slightly smaller than the lower and upper diameters of the above-mentioned upper rotary shaft (211-3), the connection state may be stably maintained.

[0095] Meanwhile, although the shape of the rotation shaft (211) and the internal hole of the rotation rod (215) as shown in FIG. 7b is advantageous in facilitating the attachment and detachment of the rack assembly (100), if there is a difference in the angle of the side inclination of the rotation shaft (211) and the internal hole of the rotation rod (215) or an error in the process, shaking may occur even when the rack assembly (100) is attached to the base assembly (300) or the rack assembly (100) may not be attached so as to be completely in close contact with the base assembly (300).

[0096] Therefore, to solve this problem, the internal opening of the rotation shaft (211) and the rotation rod (215) may be formed to include an inclined region with an inclined side as described above, but further include a vertical region with a vertical side at least on one of the upper or lower portions of the region. An example of this is illustrated in Fig. 7c.

[0097] Referring to FIG. 7c, which is another embodiment of the present invention, the rotation shaft (211) may be formed to include an inclined region (211-3-1) having a truncated cone shape formed such that the side surface is inclined, and may further include a vertical region (211-3-3 or 211-3-2) whose side surface extends vertically above or below the region. It goes without saying that the inclined region (211-3-1) and at least one vertical region (211-3-3 or 211-3-2) may be formed on the upper rotation shaft (211-3) coupled with the rotation rod (215).

[0098] Likewise, the internal cavity of the above-mentioned rotary shaft (215) may also be formed to include an inclined region (215-1) having a cone shape with inclined sides, and further include a vertical region (215-3 or 215-2) with sides extending vertically upward or downward.

[0099] In addition, the rotation axis (211) may be formed to have vertical regions both above and below the inclined region (211-3-1). That is, an upper vertical region (211-3-3) may be formed above the inclined region (211-3-1), and a lower vertical region (211-3-2) may be formed below the inclined region (211-3-1).

[0100] Accordingly, by forming the inclined region (211-3-1), that is, the diameter of the horizontal cross-section becomes smaller from the bottom to the top, the rack assembly (100) to which the rotating rod (215) is coupled can be easily coupled and detached, and by forming the vertical region (211-3-3 and / or 211-3-2), when the rotating shaft (211) and the rotating rod (215) are coupled, they are completely attached to each other, thereby preventing shaking.

[0101] Meanwhile, the rotation shaft (211), the rotation rod (215), and the rotation rod cover (214) are exposed to the high temperature environment inside the oven, and in this case, if the rotation shaft (211), the rotation rod (215), and the rotation rod cover (214) are implemented with the same material, a problem may arise in which they stick to each other and cannot be easily separated any more. Therefore, it may be desirable for at least the rotation shaft (211) and the rotation rod (215) to be implemented with different materials.

[0102] For example, the rotation shaft (211) may be made of stainless steel, and the rotation rod (215) may be made of copper. In addition, the rotation rod cover (214) may be made of stainless steel. However, the present invention is not limited to these materials, and at least the rotation shaft (211) and the rotation rod (215) may be made of different materials.

[0103] The above-mentioned rotary plate (212) has a through hole formed therein through which the rotary shaft (211) passes, and can be fitted to the rotary shaft (211) through the through hole. The rotary plate (212) can also be fitted to the rotary shaft (211) while being integrally connected to the rotary bar cover (214), and then the rotary plate (212) can rotate about the rotary shaft (211).

[0104] The above-mentioned rotation rack (213) is fixedly connected to the upper portion of the turntable (212) and can connect the lower frames (111) on both sides of the rack assembly (100). In this specification, the direction of entry of the cooking trolley (10) is referred to as the front-back direction, and the left and right based on the front-back direction are referred to as the axial direction. Since the rotation rack (213) connects the lower frames (111) on both sides of the rack assembly (100), the rotation rack (213) rotates in synchronization with the rotational movement of the turntable (212), and as a result, the rack assembly (100) can rotate.

[0105] The above-mentioned rotating rack (213) can be coupled to the rotating plate (212) via a fixing pin (216), but is not limited thereto.

[0106] The above rotation rack (213) is shown as an example in this specification in which two are formed at symmetrical positions based on the rotation axis, but is not limited thereto, and the method of combining the rotation plate (212) and the rotation rack (213) and the number of rotation racks (213) can of course be implemented in various ways.

[0107] Although this specification exemplifies an example illustrated in the drawings, the rotation assembly (200) may be formed in any structure that allows the rack assembly (100) to rotate on the base assembly (300).

[0108] Meanwhile, an example of a base assembly (300) will be described with reference to FIG. 8.

[0109] FIG. 8 is a drawing for explaining a base assembly according to an embodiment of the present invention.

[0110] As illustrated in FIG. 8, the base assembly (300) includes a vertical frame (320) and upper frames (330). The rotation support (220) may be coupled to the base assembly (300) while connecting the upper frames (330). Of course, the base assembly (300) may further include a heat-blocking plate (310) and lower frames (340), and a plurality of wheels (360) may be provided at the lower portion of the lower frames (340) for moving the base assembly (300).

[0111] The above heat blocking plate (310) is formed at the rear with respect to the trolley entry direction and can block heat from being discharged downward when the oven door is closed. The above heat blocking plate (310) can be formed by being combined with a vertical frame (320).

[0112] The above upper frames (330) are formed to extend in the longitudinal direction, i.e., in the entry direction, from the vertical frame (320) or the heat blocking plate (31) and can be formed in front of the heat blocking plate (310).

[0113] A fixing plate (370) to which a fixing device (140) of a rack assembly (100) can be coupled may be formed at the end of one or more of the above upper frames (330). As described above, when the fixing plate (370) and the fixing device (140) are coupled, the rotation of the rotational coupling part (210) of the rack assembly (100) can be blocked.

[0114] And, a rotation coupling part (210) can be coupled to a rotation shaft (211) coupled to the rotation support (220). To this end, the rotation support (220) can be provided with a predetermined rotation groove or through hole into which the rotation shaft (211) can be coupled, and accordingly, the rotation coupling part (210) can be formed to rotate on the rotation support (220).

[0115] And it may be desirable for the above-mentioned rotating support (220) to be formed at a position where a predetermined distance (d in FIG. 9) can be formed between the rear end of the above-mentioned rack assembly (100) and the heat-blocking plate (310) formed at the rear of the above-mentioned base assembly (300).

[0116] That is, in order for the rack assembly (100) to rotate on the base assembly (300), a certain level of separation distance must be secured from the heat blocking plate (310). Otherwise, there is a problem in that the rack assembly (100) cannot rotate because it gets caught on the heat blocking plate (310). It goes without saying that this separation distance can vary depending on the front-rear length of the rack assembly (100).

[0117] Therefore, it may be desirable for the above-mentioned rotation support (220) to be formed at a position where such a separation distance can be secured by taking into consideration the length of the rack assembly (100).

[0118] According to the technical idea of ​​the present invention, the cooking trolley (10) can rotate the rack assembly (100) itself on the base assembly (300) as shown in FIG. 9, so that the effort of having to take the cooking shelf (2) out of the cooking trolley (10) one by one and turn it over can be reduced.

[0119] Meanwhile, as described above, a ball house (150) can be coupled to the bottom of the vertical rack frames (110) included in the rack assembly (100), thereby allowing the rack assembly (100) to be stably supported in contact with the base assembly (300) while easily rotating.

[0120] An example of this will be described with reference to FIGS. 10 and 11.

[0121] Figures 10 and 11 are drawings for explaining a ball house according to an embodiment of the present invention.

[0122] As shown in FIGS. 10a and 10b, a ball house (150) may be coupled to the lower end of at least one of the vertical rack frames (110).

[0123] The ball house (150) can support the vertical rack frames (110) that are coupled to the base assembly (300) by contacting a predetermined position at the top of the base assembly (300) (e.g., the upper surface of the upper frame (330)), when the rack assembly (100) is coupled to the base assembly (300). The ball house (150) includes a ball (151), and the ball (151) can contact the position of the base assembly (300) (e.g., the upper surface of the upper frame (330)). When the rack assembly (100) rotates while the ball (151) is in contact with the position of the base assembly (300), the ball (151) can roll inside the ball house (150) to smoothly allow the rack assembly (100) to rotate.

[0124] That is, the ball house (150) may be configured to support the rack assembly (100) while allowing the rack assembly (100) to easily rotate on the base assembly (300).

[0125] The above ball house (150) may include a ball (151), a lower cover (152), and an upper cover (152) as shown in FIG. 11.

[0126] Here, the lower and upper names of the lower cover (151) and upper cover (152) are merely names based on the example shown in Fig. 11, and do not represent the vertical positional relationship in an actual usage environment when the actual ball house (150) is coupled to the vertical rack frame (110). The ball house (150) shown in Fig. 11 can be coupled to the vertical rack frame (110) by being turned upside down, as shown in Fig. 10b.

[0127] The lower cover (151) may have a lower groove formed to accommodate the ball (151). A portion of the ball (151) is accommodated in the lower groove, and may have a concave shape as illustrated in FIG. 11. The lower end of the lower cover (151) may have a lower protrusion hole (151-1) formed therein through which a portion of the ball may protrude, and the upper end of the lower cover (151) may have an upper protrusion hole (151-2) formed therein.

[0128] The diameter of the lower protrusion hole (151-1) may be formed to be smaller than the diameter of the ball (151) so that the ball (151) cannot penetrate the lower protrusion hole (151-1), and the diameter of the upper protrusion hole (151-2) may be formed to be equal to or substantially equal to the diameter of the star (151) so that the ball (151) can be inserted into the lower groove.

[0129] In addition, the height of the lower cover (151) may be smaller than the height of the ball (151), and the lower groove may have a region having a curvature smaller than the curvature of the ball. For example, the curvature of a certain portion of the upper portion of the lower groove may be formed smaller than the curvature of the ball (151). And the curvature of the lower portion of the certain portion may be formed to be the same as or similar to the curvature of the ball (151). Then, since the curvature of the certain portion is smaller than the curvature of the ball (151), when a physical force is applied from the top to the bottom of the ball (151), the ball (151) can move up and down within the certain portion. However, since the diameter of the lower protrusion (151-1) is smaller than the diameter of the ball (151), the ball (151) moves up and down within the certain portion, but cannot be discharged outside the lower cover (151).

[0130] Depending on the embodiment, the overall curvature of the lower groove may be formed to be smaller than the curvature of the ball (151). Even in this case, the desired effect can be achieved because the height of the lower cover (151) is smaller than the ball (151). In addition, as described above, only a certain portion of the upper portion of the lower groove may be formed to be smaller than the curvature of the ball (151), and the remaining portion may be formed to have substantially the same curvature as the ball (151).

[0131] Due to the technical characteristics of the lower cover (151) and the lower groove, the ball (151) can be allowed to move up and down, and when the rack assembly (100) comes into contact with the base assembly (300), the ball (151) moves toward the lower protrusion (151-1), and when the rack assembly (100) does not come into contact with the base assembly (300), the ball (151) moves again toward the upper protrusion (151-2), thereby acting as a buffer when the rack assembly (100) and the base assembly (300) come into contact.

[0132] The upper cover (153) may also be formed with an upper protrusion hole (153-1) and a lower protrusion hole (153-2). In one example, the upper groove of the upper cover (153) may be formed to have a curvature substantially the same as the curvature of the ball (151), and the diameter of the upper protrusion hole (153-1) may be smaller than the diameter of the ball (151), and the diameter of the lower protrusion hole (153-2) may be implemented to be substantially the same as the diameter of the ball (151).

[0133] A portion of the ball (151) protrudes outward through the upper protrusion hole (153-1) of the upper cover (153), and a portion of the protruding ball (151) comes into contact with the base assembly (300). Through this, the ball (151) can be accommodated in the lower groove of the lower cover (152), and then the upper cover (153) can be covered, thereby easily manufacturing the ball house (150).

[0134] The ball (151) is implemented so that it can roll inside the ball house (150), so that when the rack assembly (100) rotates while the ball (151) is in contact with the base assembly (300) at a predetermined position, the ball (151) rolls, thereby enabling the rack assembly (100) to rotate smoothly even while in contact with the base assembly (300).

[0135] An oven system according to the technical idea of ​​the present invention includes an oven (1) and a cooking trolley (10).

[0136] And the cooking trolley (10) includes a rack assembly (100), a base assembly (300), and a rotation assembly (200) formed so as to rotate the rack assembly (100) on the base assembly (300) while connecting the base assembly (300) and the rack assembly (100) as described above.

[0137] The foregoing description of the present invention is for illustrative purposes only, and those skilled in the art will appreciate that the present invention can be readily modified into other specific forms without altering the technical spirit or essential characteristics thereof. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. For example, each component described as a single component may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined manner. The scope of the present invention is indicated by the claims described below rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention.

[0138]

[0139] The present invention can be used in a cooking trolley and an oven system having the same.

Claims

1. In the cooking trolley, A rack assembly having a plurality of guide tracks so that a plurality of cooking shelves can be stacked and stored; A base assembly having wheels to support and move the above rack assembly; and A rotating assembly is formed to be able to rotate the rack assembly on the base assembly while combining the base assembly and the rack assembly, The above rotating assembly, The rack assembly rotates around the rotation axis, including the rotation axis, A cooking trolley characterized in that the above rotation axis includes an inclined region with an inclined side and a vertical region extending above or below the inclined region and having a vertical side.

2. In the first paragraph, the rotating assembly, A lower assembly including a rotary support formed on the base assembly and having an insertion portion into which the rotary shaft can be inserted, and the rotary shaft; and A cooking trolley comprising a rotation coupling portion coupled to the lower portion of the rack assembly and coupled to the rotation support so that the rack assembly is rotationally coupled to the base assembly.

3. In the second paragraph, the rotating joint, A rotary shaft having an internal hole formed so that the upper part of the rotary shaft can be fitted, and including a rotary rod that rotates around the rotary shaft, The internal hole of the above rotating shaft is, A cooking trolley characterized in that it includes an inclined region with an inclined side corresponding to the shape of the above rotation axis and a vertical region with a vertical side extending above or below the inclined region.

4. In the first paragraph, the rack assembly, Vertical rack frames having a predetermined length in the height direction of the above rack assembly; The plurality of guide tracks connecting any two of the above vertical rack frames and protruding inwardly of the rack assembly so that one end of the cooking shelf can be slidably inserted; and A cooking trolley comprising a ball house coupled to the lower end of at least one of the vertical rack frames and having a ball that rolls when the rack assembly rotates while supporting at least one of the vertical rack frames by contacting the upper frame of the base assembly.

5. In the fourth paragraph, the ball house, A lower cover in which a lower groove is formed to accommodate the ball, a portion of the ball is accommodated, a lower protrusion smaller than the diameter of the ball is formed at the bottom, and the lower groove has an area having a curvature smaller than the curvature of the ball, so that the ball can move up and down a certain distance inside the lower groove; and A cooking trolley comprising an upper cover having an upper groove formed to accommodate a portion of the ball and an upper protrusion formed at the top through which a portion of the ball can protrude.

6. In the cooking trolley, A rack assembly comprising: a plurality of cooking shelves stacked and stored therein, vertical rack frames having a predetermined length in the height direction of the rack assembly; a plurality of guide tracks connecting any two of the vertical rack frames and protruding inwardly of the rack assembly so that one end of the cooking shelf can be slidably inserted; and a ball house coupled to the lower end of at least one of the vertical rack frames and in contact with an upper frame of a base assembly to support at least one of the vertical rack frames, and having a ball that rolls when the rack assembly rotates; A base assembly having wheels to support and move the above rack assembly; and A cooking trolley comprising a rotating assembly formed to rotate the rack assembly on the base assembly while connecting the base assembly and the rack assembly.

7. Oven; and Includes a cooking trolley that can be introduced or withdrawn into the cooking chamber of the above oven, The above cooking trolley is, A rack assembly having a plurality of guide tracks so that a plurality of cooking shelves can be stacked and stored; A base assembly having wheels to support and move the above rack assembly; and A rotating assembly is formed to be able to rotate the rack assembly on the base assembly while combining the base assembly and the rack assembly, The above rotating assembly, The rack assembly rotates around the rotation axis, including the rotation axis, An oven system wherein the above rotation axis includes an inclined region with an inclined side and a vertical region extending above or below the inclined region and having a vertical side.

8. Oven; and Includes a cooking trolley that can be introduced or withdrawn into the cooking chamber of the above oven, The above cooking trolley is, A rack assembly comprising: a plurality of cooking shelves stacked and stored therein, vertical rack frames having a predetermined length in the height direction of the rack assembly; a plurality of guide tracks connecting any two of the vertical rack frames and protruding inwardly of the rack assembly so that one end of the cooking shelf can be slidably inserted; and a ball house coupled to the lower end of at least one of the vertical rack frames and in contact with an upper frame of a base assembly to support at least one of the vertical rack frames, and having a ball that rolls when the rack assembly rotates; A base assembly having wheels to support and move the above rack assembly; and An oven system comprising a rotating assembly formed to rotate the rack assembly on the base assembly while connecting the base assembly and the rack assembly.

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