JP6473340B2 - Refrigerated showcase cover structure - Google Patents

Description

The present invention relates to a cover structure for opening and closing window holes such as an operation window and a viewing window opened on the outer surface of a refrigerated showcase .

  The showcase described in Patent Document 1 is a refrigeration / refrigeration showcase in which a refrigerator made of a compressor or the like is housed in a machine room provided below the cooling chamber. On the decorative plate covering the front surface of the machine room, an operation window leading to an operation unit such as a power switch is formed, and a window frame is fitted to the inner surface of the operation window. The window frame supports a plate-like cover that closes the operation window so as to be freely opened and closed. Support covers are provided on both sides of the upper portion of the cover, and guide grooves are provided on both sides of the window frame for slidingly guiding the support rods. When a finger is put on the latching portion at the lower front of the cover and the cover is lifted to the front, the operation window can be opened by rotating the cover toward the front with the support rod as a fulcrum. When the cover rotated to the front side is moved inward of the machine room along the guide groove, the operation window is released by supporting the cover with the inward protruding portion below the guide groove. Can be held.

Microfilm (Figs. 3 and 4) of Japanese Utility Model No. 63-92186 (Japanese Utility Model Laid-Open No. 2-13983)

  When cooling the cooling chamber of the showcase of Patent Document 1, a refrigerator (compressor or the like) housed in the machine chamber is driven, and vibration is generated accordingly. This vibration propagates in each direction and also propagates to the plate-like cover that closes the operation window. As a result, the cover vibrates, and chatter noise may occur at the contact portion between the cover and the window frame that supports the cover. In particular, when the cover is formed of a steel plate, unpleasant chatter noise is likely to occur. Although it is possible to suppress chatter noise by providing a cushioning body such as rubber at the contact portion between the cover and the window frame, there is a disadvantage that the cost increases as the cushioning body is provided.

An object of the present invention is to provide a refrigerated show that makes it difficult to vibrate a cover for opening and closing a window hole without causing an increase in cost due to the provision of a shock absorber, and suppresses chatter noise caused by the vibration of the cover. The object is to provide a case cover structure.

The present invention is directed to a cover structure in which a cover 22 for opening and closing a window hole 21 opened on the outer surface of a refrigerated showcase is supported by a horizontal swing shaft 23 provided on an upper portion of the cover 22 so as to be swingable and openable. . A stopper piece 36 is provided at the opening edge of the window hole 21, and a contact piece 30 received by the stopper piece 36 is provided at the end of the cover 22. The central axis L of the swing shaft 23 in a state in which the cover 22 is closed is disposed at a position offset inward and outward of the window hole 21 with respect to the center of gravity G of the cover 22. The contact piece 30 is disposed at the upper end portion of the cover 22, and the swing shaft 23 is disposed below the contact piece 30 . The contact piece 30 of the cover 22 in the closed position is pressed against the stopper piece 36 by a closing moment around the swing shaft 23 that swings the cover 22 from the open position to the closed position by its own weight.

  A distance D1 from the center axis L of the swing shaft 23 to the contact portion T between the contact piece 30 and the stopper piece 36 is smaller than a distance D2 from the center axis L of the swing shaft 23 to the center of gravity G of the cover 22. Can be set.

  The cover 22 is an open type, and a restriction piece 37 that restricts the inward swinging of the cover 22 is provided at the opening edge of the window hole 21, and the restriction piece 37 is provided at a lower portion of the cover 22 in the closed position. It is possible to take a form that is located inward and faces the lower part with a slight gap.

  The cover 22 includes a front panel 26 that closes the window hole 21, an upper piece 29 that extends from the upper side of the front panel 26 to the inside of the window hole 21, and a contact piece 30 that extends upward from the inner end of the upper piece 29. The stopper piece 36 is bent inwardly at the opening edge of the window hole 21, and the outer surface of the abutting piece 30 is received by the inner end of the stopper piece 36 when the cover 22 is closed. Can be taken.

In the cover structure of the refrigerated showcase according to the present invention, the center axis L of the swing shaft 23 in a state in which the cover 22 is closed is located at a position offset inward and outward of the window hole 21 with respect to the center of gravity G of the cover 22. By arranging, the contact piece 30 of the cover 22 in the closed position is pressed against the stopper piece 36 by the closing moment due to the weight of the cover 22. According to this, even if the vibration accompanying the drive of the refrigerator accommodated in the refrigerated showcase propagates to the cover 22 in the closed position, the cover 22 is difficult to vibrate. Therefore, it is possible to suppress the occurrence of chatter sound accompanying the vibration of the cover 22. Furthermore, according to the present invention, the contact piece 30 is pressed against the stopper piece 36 by the closing moment to suppress the vibration of the cover 22, so that chatter noise is not incurred without increasing the cost associated with the provision of a shock absorber such as rubber. Can be suppressed.

  When the contact piece 30 is arranged at the upper end portion of the cover 22, the distance from the central axis L of the swing shaft 23 to the contact piece 30 is shortened compared to the case where the contact piece 30 is arranged at the lower end portion of the cover 22, The contact piece 30 can be strongly pressed against the stopper piece 36. Therefore, the cover 22 in the closed position is less likely to vibrate, and chatter noise associated with the vibration of the cover 22 can be more effectively suppressed.

  A distance D1 from the center axis L of the swing shaft 23 to the contact portion T between the contact piece 30 and the stopper piece 36 is smaller than a distance D2 from the center axis L of the swing shaft 23 to the center of gravity G of the cover 22. When set, the contact piece 30 can be pressed strongly against the stopper piece 36 as compared with the case where the distance D1 is larger than the distance D2. Therefore, the cover 22 in the closed position is less likely to vibrate, and chatter noise associated with the vibration of the cover 22 can be more effectively suppressed.

  When the cover 22 is an outward opening type, the user can open the window hole 21 by swinging the cover 22 by pushing the upper end of the cover 22 inward. On the other hand, if the user accidentally presses the lower portion of the cover 22, the contact piece 30 may be strongly pressed against the stopper piece 36 and plastically deformed. Therefore, in the present invention, the restricting piece 37 that restricts the inward swinging of the cover 22 is provided at the opening edge of the window hole 21. The restricting piece 37 is located inward of the lower portion of the cover 22 in the closed position, and faces the lower portion with a slight gap. According to the restriction piece 37, even if the lower portion of the cover 22 is accidentally pushed, the restriction piece 37 receives the lower portion of the cover 22 when the contact piece 30 is slightly deformed. It is possible to reliably prevent the contact piece 30 from being strongly pressed, that is, the contact piece 30 from being plastically deformed.

  An upper piece 29 is formed from the upper side of the front panel 26 of the cover 22 to the inside of the window hole 21, and a contact piece 30 is formed upward from the inner end of the upper piece 29. The stopper piece 36 is bent inward at the opening edge of the window hole 21, and the outer surface of the contact piece 30 is received by the inner end of the stopper piece 36. According to the above configuration, since the contact piece 30 and the stopper piece 36 can be accommodated inside the window hole 21 in a state where the cover 22 is closed, objects and clothes are placed on the contact piece 30 and the stopper piece 36. It is possible to reliably prevent the inconvenience of being caught.

It is a vertical side view of the cover structure of the refrigerated showcase to which the present invention is applied. It is a front view of a refrigerated showcase. It is a vertical side view of a refrigerated showcase. It is the sectional view on the AA line in FIG. It is a figure for demonstrating the opening / closing operation | movement of a cover.

(Example) FIGS. 1-5 shows the Example of the refrigerated showcase to which the cover structure based on this invention is applied. In the present embodiment, front and rear, left and right, and up and down are in accordance with the arrows shown in FIGS. As shown in both figures, the refrigerated showcase includes a heat insulating box 2 having a refrigerator 1, a pair of sliding doors 3 that closes and opens the front opening of the refrigerator 1, and a lower side of the heat insulating box 2. It is comprised with the housing 4 etc. which are arrange | positioned. The housing 4 is a box having the same front and rear dimensions and left and right dimensions as the heat insulating box 2, and a machine room 5 is formed therein. An air permeable machine room panel 6 is detachably attached to the front opening of the machine room 5.

  A plurality of shelves 9 are installed inside the refrigerator compartment 1, and an evaporator 10 that cools the air in the refrigerator compartment 1 and air cooled by the evaporator 10 are placed in the upper part of the refrigerator compartment 1. An internal fan 11 that is circulated in the refrigerator compartment 1 is installed. The compressor 12 and the condenser 13 that constitute a refrigerator together with the evaporator 10 are accommodated in the machine room 5. The machine room 5 houses devices such as a blower fan 14 for supplying heat exchange air to the condenser 13 and an electrical box 15 containing electrical components such as a control board. The electrical box 15 is disposed at the front end of the machine room 5, and a ground fault interrupter 16 is disposed on the front surface of the electrical box 15. Condensed water generated on the surface of the door 3 and defrosted water generated when the evaporator 10 is defrosted are drained to a drain pan 17 provided on the lower surface of the machine room 5.

  As shown in FIGS. 1 and 4, a window hole 21 facing the leakage breaker 16 is opened in the machine room panel 6, and an outside opening type for closing the window hole 21 so as to be openable and closable inside the window hole 21. The cover 22 is arranged. The cover 22 is swingably supported by a pair of left and right horizontal swing shafts 23 provided on the top thereof. As indicated by an imaginary line in FIG. 5, the leakage breaker 16 can be operated from the front of the machine room panel 6 by swinging the cover 22 forward (outward) to open the window hole 21. The cover 22 is subjected to a closing moment around the swing shaft 23 that swings the cover 22 from the open position to the closed position by its own weight, and normally closes the window hole 21 as shown in FIG. . The machine room panel 6 and the cover 22 are formed of steel plates.

  Specifically, the cover 22 includes a rectangular plate-like front panel 26 that closes the window hole 21, a pair of left and right side pieces 27 that are continuous to the left and right sides of the front panel 26, and a lower piece that is continuous to the lower side of the front panel 26. 28, an upper piece 29 continuous with the upper side of the front panel 26, and a contact piece 30 continuous with the rear end of the upper piece 29. The side piece 27, the lower piece 28, and the upper piece 29 are bent inward, that is, rearward of the machine room 5 and are orthogonal to the front panel 26. The contact piece 30 is bent upward and is orthogonal to the upper piece 29. The cover 22 in the closed position is entirely accommodated inside the window hole 21, and the front panel 26 and the front surface of the machine room panel 6 are flush with each other. In FIG. 1, the symbol G indicates the center of gravity of the cover 22. The center of gravity G of the cover 22 in the closed position is located slightly behind the front panel 26 and in front of the front-rear center of the side piece 27.

  The window hole 21 is formed in a rectangular shape slightly larger than the front panel 26 of the cover 22 in front view. The opening edge of the window hole 21 includes a pair of left and right support walls 35 that are continuous to the left and right edges of the window hole 21, a stopper piece 36 that is continuous to the upper edge of the window hole 21, and a central portion of the lower edge of the window hole 21. And a regulating piece 37 that is continuous with the other. The support wall 35 and the stopper piece 36 are bent inward and are orthogonal to the opening surface of the window hole 21. The restricting piece 37 includes a horizontal piece 38 extending rearward from the lower edge of the window hole 21 and a vertical piece 39 extending upward from the rear end of the horizontal piece 38. As shown in FIG. 1 in an enlarged manner, the vertical piece 39 of the restricting piece 37 is located behind (inward) the lower piece 28 of the cover 22 in the closed position, and is moved back and forth through a slight gap with the lower piece 28. Opposite to.

  In FIG. 4, each support wall 35 faces the side piece 27 of the cover 22 in the closed position, and includes a support hole 43 that supports the swing shaft 23 made of a bolt. The side piece 27 is also formed with a bearing hole 44 having the same diameter as the support hole 43. The swing shaft 23 includes a head portion 23a received by the outer surface of the support wall 35, a shaft portion 23b inserted through the support hole 43 and the bearing hole 44, and a male screw portion 23c into which a nut 45 is screwed on the inner surface side of the side piece 27. It consists of. Between the side piece 27 and the support wall 35, a ring-shaped spacer 46 inserted through the shaft portion 23b is disposed.

  In the state where the cover 22 shown in FIG. 1 is closed, the central axis L of the shaft portion 23b of the swing shaft 23 is disposed at a position deviated rearward (inward of the window hole 21) with respect to the center of gravity G of the cover 22. Has been. According to the positional relationship between the center of gravity G and the central axis L, a counterclockwise closing moment in FIG. 1 centering on the central axis L acts on the cover 22 stationary at the closed position. Specifically, a moment that tilts forward acts on a portion of the cover 22 above the central axis L, and a moment that tilts backward acts on a portion of the cover 22 below the central axis L. With this closing moment, the cover 22 is stationary at the closed position while the front surface (outer surface) of the contact piece 30 of the cover 22 is pressed against the rear end (inner end) of the stopper piece 36.

  As described above, when the abutting piece 30 of the cover 22 in the closed position is pressed against the stopper piece 36, the vibration accompanying the driving of the compressor 12 and the blower fan 14 in the machine room 5 propagates to the cover 22. However, since the cover 22 is less likely to vibrate, it is possible to suppress the occurrence of chatter noise accompanying the vibration of the cover 22. Even if the machine room panel 6 and the cover 22 are formed of steel plates as in this embodiment and an unpleasant chatter noise is likely to occur at the contact portion between the two, the cushioning body such as rubber is not provided. The occurrence of chatter noise can be suppressed.

  In this embodiment, since the contact piece 30 is disposed at the upper end portion of the cover 22, compared to the case where the contact piece 30 is disposed at the lower end portion of the cover 22, from the central axis L of the swing shaft 23 to the contact piece 30. Thus, the contact piece 30 can be strongly pressed against the stopper piece 36. Therefore, the cover 22 in the closed position is less likely to vibrate, and chatter noise associated with the vibration of the cover 22 can be more effectively suppressed.

  In FIG. 1, symbol T indicates a contact portion between the contact piece 30 of the cover 22 and the stopper piece 36 in the closed position. A distance D1 from the central axis L of the swing shaft 23 to the contact portion T is set to be smaller than a distance D2 from the central axis L to the center of gravity G of the cover 22 (D1 <D2). As described above, when the contact portion T is arranged closer to the central axis L than the center of gravity G, the contact piece 30 is strongly pressed against the stopper piece 36 as compared with the case where the contact portion T is arranged far away. Can do. Therefore, the cover 22 in the closed position is less likely to vibrate, and chatter noise associated with the vibration of the cover 22 can be more effectively suppressed.

  The cover 22 in the closed position is swung around the swinging shaft 23 when the upper end of the front panel 26 (upper side of the central axis L of the swinging shaft 23) is pushed backward as indicated by an arrow in FIG. Can be opened. On the other hand, if the lower portion of the front panel 26 (under the central axis L of the swing shaft 23) is accidentally pushed, the cover 22 swings slightly counterclockwise in FIG. At that time, the lower piece 28 is received by the vertical piece 39 of the restricting piece 37 and further swinging is restricted. When the lower piece 28 is received by the restricting piece 37, the contact piece 30 is slightly elastically deformed with respect to the upper piece 29, but is not plastically deformed. When the pressing of the cover 22 is stopped, the contact piece 30 is stopped. Quickly returns to the state before elastic deformation. As described above, when the restriction piece 37 that restricts the inward swing of the cover 22 is provided, the contact piece 30 can be reliably prevented from being plastically deformed. The restricting piece 37 can also be provided on the left and right edges of the window hole 21.

  Although the cover structure shown in the above embodiment is an outward opening type in which the cover 22 is swung forward, that is, outward of the machine room 5 to open the window hole 21, the present invention is an inward opening type cover structure. It can also be applied to. In the inner opening type cover structure, the central axis L of the swing shaft 23 is disposed at a position offset forward (outward of the window hole 21) with respect to the center of gravity G of the cover 22 at the closed position. A moment that tilts backward acts on a portion of the cover 22 above the central axis L, and a moment that tilts forward acts on a portion of the cover 22 below the central axis L. Further, the cover 22 stops at the closed position in a state where the rear surface (inner surface) of the contact piece 30 provided at the upper end portion of the cover 22 is pressed against the front end (outer end) of the stopper piece 36.

  The contact piece 30 can be disposed at the lower end portion or the side end portion of the cover 22 in addition to the upper end portion of the cover 22. When the contact piece 30 is provided on the lower side of the central axis L of the swing shaft 23 in the outer opening type cover structure, the rear surface (inner surface) of the contact piece 30 is pressed against the front end (outer end) of the stopper piece 36. It is done. The application target of the cover structure according to the present invention is not limited to the operation window of the machine room panel 6 facing the earth leakage breaker 16, but can be applied to, for example, a viewing window provided on the door of the refrigerator. In addition to the refrigerated showcase shown in the above embodiment, the present invention can be applied to a cover structure such as a refrigerator, a freezer, a freezer showcase, and an automatic ice maker. Can also be arranged.

5 Machine room 6 Machine room panel 15 Electrical box 16 Earth leakage breaker 21 Window hole 22 Cover 23 Oscillating shaft 30 Contact piece 36 Stopper piece 37 Restriction piece

Claims (4)

A cover (22) for opening and closing a window hole (21) opened on the outer surface of the refrigerated showcase is supported by a horizontal swing shaft (23) provided at an upper portion of the cover (22) so as to be swingable and openable.
A stopper piece (36) is provided at the opening edge of the window hole (21), and a contact piece (30) received by the stopper piece (36) is provided at the end of the cover (22),
The central axis (L) of the swing shaft (23) in a state in which the cover (22) is closed is disposed at a position offset inward and outward of the window hole (21) with respect to the center of gravity (G) of the cover (22). Has been
The contact piece (30) is disposed at the upper end of the cover (22), and the swing shaft (23) is disposed below the contact piece (30).
The contact piece (30) of the cover (22) in the closed position causes the stopper piece (36) by a closing moment around the swing shaft (23) that swings the cover (22) from the open position to the closed position by its own weight. Cover structure of a refrigerated showcase , characterized by being pressed against. The distance (D1) from the center axis (L) of the swing shaft (23) to the contact portion (T) between the contact piece (30) and the stopper piece (36) is the center axis of the swing shaft (23). The cover structure for a refrigerated showcase according to claim 1, wherein the cover structure is set smaller than a distance (D2) from (L) to the center of gravity (G) of the cover (22) . The cover (22) is an outward opening type,
A restriction piece (37) for restricting inward swinging of the cover (22) is provided at the opening edge of the window hole (21),
The cover of the refrigerated showcase according to claim 1 or 2, wherein the regulating piece (37) is located inward of the lower portion of the cover (22) in the closed position and is opposed to the lower portion with a slight gap. Construction. A front panel (26) having a cover (22) closing the window hole (21), an upper piece (29) extending from the upper side of the front panel (26) to the inside of the window hole (21), and an upper piece (29) A contact piece (30) extending upward from the inner end of the
A stopper piece (36) is bent inward at the opening edge of the window hole (21),
The cover structure for a refrigerated showcase according to any one of claims 1 to 3, wherein the outer surface of the contact piece (30) is received by the inner end of the stopper piece (36) in a state where the cover (22) is closed. .

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