JP3030486U - Door hinge structure for optimal temperature distribution - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a door hinge structure for maintaining a closed state of an optimal temperature distribution vehicle. SOLUTION: A lower hinge 9 in each of a pair of double doors of an optimal temperature distribution car has a shaft receiving hole and an endless cam-like upper surface which repeats unevenness in the circumferential direction at intervals of 45 ° or more around the hole. Is fixed to the axial position of the door 1b on the lower surface of the front frame of the main body of the vehicle, and the lower surface of the corresponding lower end of the door corresponds to the unevenness of the supporting cam block. Pivoting cam block 15 that is shaped like a corresponding endless cam and has a similar shaft receiving hole.
Is installed so that it is in cam contact with the support cam block and the peaks and valleys of the cam surfaces of both blocks fit into each other at the door closing position, and the lower hinge shaft 14 is fitted in the shaft receiving holes of the both blocks aligned with each other. It is configured by fitting and maintaining at least one of the blocks and the shaft in a rotatable relationship with each other.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a door hinge structure for an optimal temperature distribution vehicle.

[0002]

[Prior art]

 A large section and a small section are formed on both sides of the separator that crosses between the long sides, and a large number of trays that can use one of these sections as a cold food section and the other as a hot food section are stored. Accordingly, an appropriate temperature distribution vehicle in which the above-mentioned separation band is sandwiched by partition plates in the refrigerator from above and below so as to partition both sections adiabatically is, for example, as shown in Fig. 1, each of the right half part and the left half part is It has doors 1a and 1b having a width corresponding to the length of the tray and having a width that divides the width into two equal parts, and 1a 'and 1b'. Each door consists of a glass or plastic transparent plate 2 fixed to a frame, and a handle 3 is attached near the free end on the front of the frame. Since the temperature compartments inside the serving car cannot be exchanged to a large extent, for example, when cooling the central part of the serving car and heating or keeping both sides sandwiching it, the large section of the tray is usually used as the hot-spot part. If the subdivision is to serve as a cold food portion, the partition plate (not shown in FIG. 1) is located in the left and right halves in FIG. 1 from the free edges of the doors 1b, 1b '(closed state) on the center side of the vehicle. Will be located inside those doors (close to the center of the car). However, if the small section of the tray is to be the hot section and the large section to be the cold section, a partition plate (not shown) will be installed to turn the tray upside down and store the large section closer to the center of the serving car. It must be moved to the inside of the doors 1a and 1a 'on both sides (towards the outside of the car) with respect to the free edges of those doors.

Since the rear ends of the partition plates 4 shown in FIGS. 2A and 2B reach the inside of the compartment, by sandwiching the separation band 5c of the tray 5, the space on both sides after the front end, Therefore, the space on the small section 5a and the space on the large section 5b are almost completely partitioned off. However, if there is a gap between the front end of the partition plate 4 and the door, whether the cold air and the hot air in the two side spaces are the gaps. Will be distributed to each other. Therefore, conventionally, as shown in FIG. 2C, a rubber magnet plate 6 is installed at a position near the free end on the back surface of the glass plate 2 of the doors 1a and 1b (the same applies to 1a ′ and 1b ′), and the partition plate 4 is provided. A ferromagnet (eg, steel alloy) plate 7 having an upper end shape adapted to the back surface of the separation band 5c of the tray 5 and a lower end shape adapted to the same surface is fixed to the front end of the, and the The body plate 7 is attracted to the rubber magnet plate 6 to maintain the closed state of the door and prevent a substantial gap between the door and the front end of the partition plate 4. The upper and lower ends of the rubber magnet plate 6 reach the upper frame and the lower frame of the door, respectively, and a similar rubber magnet plate 6'extending horizontally from there to the vicinity of the hinge end is continuously provided. Further, rubber fins 8a and 8b are attached to the free end edges of the pair of doors 1a and 1b to press them against each other to maintain the airtightness of the interior.

[0004]

[Problems to be solved by the device]

 As described above, it is economically expensive to use the rubber magnet plates 6 and 6 ′ in a relatively large amount except for the pivot end of the door frame. The suction power was not perfect, and there was the drawback that the door would open while the catering car was moving. Further, since the rubber magnet plate is used to maintain the door closed state and to eliminate the gap between the door and the partition plate, there is no binding force to maintain the door opened at any angle. it is obvious.

According to this invention, in order to reduce the specific gravity of the rubber magnet plate in the material cost of the catering car, the rubber magnet plate is completely removed, or even when it is at least partially removed, the door closed state is completely removed. The aim is to provide a cam type hinge mechanism that can be maintained at the same level. It is desirable that the cam type hinge mechanism can stably maintain the door open state at a predetermined angle.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a separating strip on both sides of the separating strip, which is provided at the same height as the periphery along the outer periphery of the rectangular or oval shape and crosses between the long sides thereof. An optimal temperature distribution vehicle capable of accommodating and transporting a large number of trays each having a large section and a small section, one of these sections serving as a cold eating section and the other serving as a hot eating section, which can be flexibly used, The lower hinges of each of the pair of double doors that are applied over the tray storage width corresponding to the length of the tray are: a) a shaft receiving hole and a circumferential direction at intervals of 45 ° or more around the hole. A support cam block having an endless cam-shaped upper surface that repeats unevenness is fixed to a door shaft position on the lower surface of the front frame of the main body of the car, and b) at the lower end of the corresponding rotation shaft side of the door, The bottom surface The supporting cam block has an endless cam shape and is formed with a similar shaft receiving hole so that the rotating cam block is brought into cam contact with the supporting cam block and both blocks at the door closing position. C) Mount the cam surface so that the peaks and troughs of the blocks fit together. C) Fit the lower hinge shaft into the shaft receiving holes of the two blocks aligned with each other so that at least one of the blocks and the shaft can rotate freely. The upper hinge provided on each of the pair of double doors corresponding to the lower hinge corresponds to the door shaft position on the upper surface of the front frame of the main body of the car. The upper end of the door on the rotating shaft side is rotatably supported, and elastic means for constantly pressing the door downward is provided. This is a door hinge structure for an optimal temperature distribution car.

According to the above configuration, at the door closed position and the door open position at the predetermined angle, one peak and the other valley of the cam surfaces of the support cam block and the rotating cam block of the lower hinge of the door fit into each other, This fitted state is sufficiently maintained by the dead weight of the door and the pressing force of the elastic means on the upper hinge, and the door does not sway even when the serving car moves at these angles.

Therefore, a mere rubber plate having no magnetic force is arranged on at least a vertical side portion of the band where the rubber magnet plate is conventionally located on the back surface of each door, and this is used as a partition plate in the refrigerator. It is possible to secure the airtight separation between the cold food portion and the hot food portion by pressing the front end of the.

[0009]

[Embodiment of device]

 Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. FIG. 3 shows the door 1a or 1b, and in FIG. 1, the hinge structure 9 provided at the lower right end of the door 1b. The lower right end of the door 1b is fixedly supported by a rotation support portion 11 of a door support fitting 10 having a width corresponding to the thickness of the door frame, and the rotation support portion 11 rotates the pivot portion 12 of the door support fitting 10. It has an upright edge 13 protruding laterally from the moving side 12a (FIG. 3B) and abutting against the front surface of the door frame. On the pivot side of the pivot portion 12, a tip protruding from the door support portion 11 and the rotating side of itself is formed in a semicircular shape, and a shaft 14 concentric with the semicircle is projected from the back surface. Further, an upper cam block 15 having a shaft receiving hole fitted to the shaft 14 is fixed to the back surface of the pivot portion 12.

The support cam block 16 cooperating with the upper cam block 15 is installed on a metal cam support stand 17 fixed to the lower surface of the front frame of the catering car in its axial position. The support cam block 16 and the cam support base 17 are provided with shaft receiving holes for rotatably fitting the shaft 14 projecting downward from the pivot portion 12 of the door support fitting 10. The cam blocks 15 and 16 have thrust cam faces made of a plastic material having excellent surface slipperiness and strength, for example, polyacetal resin, which are circumferentially arranged around the shaft receiving hole at intervals of 45 °. It is formed in the shape of an endless cam in which irregularities are repeatedly formed, and the peaks and troughs of both are fitted to each other at relative angular positions every 90 °, and the angular position is maintained. Although the shaft 14 is fixed to the cam block 15 and rotatable with respect to the cam block 16, it may be rotatable with respect to the opposite relationship or both.

FIG. 4 is a side view (A) and a plan view (B) of the support cam block 16, in which valleys 18 having flat bottoms and ridges 19 having flat bases are formed at 45 ° intervals. The mountain and the valley are made continuous by a relatively steep slope 20. By doing so, even if a considerable turning force is required to rotate 45 ° from the door closed position as shown in FIG. 3A to the door open position as shown in FIG. 3C, the door closed position is required. It can be seen that the fixed state in etc. is maintained very strongly. Two adjacent holes 21 shown in FIGS. 4A and 4B are provided for fixing the support cam block to the support base 17 through screws or bolts depending on the design. As in this embodiment, in a block in which peaks and valleys are formed at intervals of 45 °, the door closed position, the position where the door is opened at 90 °, and the position where it is opened at 180 ° (the doors 1a at both ends are It is clear that 1a 'can be kept fixed in the folded position until it hits the side wall of the car.

FIG. 5 is a partial cross-sectional view showing the structure of the upper hinge structure 22 formed to assist the lower position fixing operation of the lower hinge mechanism described above. For example, the upper right end of the door 1b is supported by the door supporting side of the hinge plate 23 having a planar shape corresponding to the door supporting fitting 10, and from the position corresponding to the shaft 14 of the lower hinge on the pivot side of the hinge plate 23, The upper hinge shaft 24 is provided so as to project upward. The hinge shaft 24 is rotatably inserted in a metal collar 26 fitted and fixed to a catering frame top plate 25. Spring washers 27 and 28 surrounding the shaft 24 are respectively arranged on the lower surface of the collar 26 and the shaft root of the hinge plate 23, and a coil spring 29 is press-fitted between these washers, so that the hinge plate 23, The door 1b is always pressed downward. Therefore, the lower hinges shown in FIGS. 3 and 4 strongly maintain the fitting state of the peaks and troughs of the pair of cam blocks at the door closed position and the fixed positions such as 90 ° and 180 °. .

[0013]

[Effect of device]

 Since the present invention is as described above, the door opens due to vibration even during movement in the door closed state, or the door of the catering car brought to a fixed position is opened at a predetermined angle to open the tray. Even when putting in and out, it is possible to reliably maintain the opened state at that angle. In particular, in order to strongly maintain the closed state of the door, it is desirable to keep the rubber magnet plate as it is at least above and below the door frame so that the rubber magnet plate is attracted to the metal frame in front of the catering car. In addition, the concavo-convex spacing of the pair of cam blocks in the lower hinge is not limited to 45 ° in the embodiment, but can be selected to any angle above 45 °, such as 60 °.

[Brief description of drawings]

FIG. 1 is a front view of a catering car of an embodiment.

FIG. 2 is an end view (A) showing an engaged state of a food tray and a partition plate housed in the delivery car, a plan view of the tray (B), and a portion showing an engaged state of the back surface of the door and a front end of the partition plate. It is a front view (C).

FIG. 3 is a front view (A), a plan view (B), and a partial front view (C) in a 45 ° door open state of a lower hinge structure of a food service vehicle door of an embodiment.

FIG. 4 is a front view (A) and a plan view (B) of a support cam block.

FIG. 5 is a partial front view showing an upper hinge structure.

[Explanation of symbols]

 1a, 1b, 1a ', 1b' Door 9 Hinge structure 10 Door support metal fitting 11 Rotation support part 12 Axis part 13 Upright edge 14 Shaft 15, 16 Cam block

Claims (1)

[Scope of utility model registration request] 1. A large section and a small section are formed on both sides of the separation band by providing a separation band that extends between the long sides at the same height as the peripheral edge along the outer periphery of a rectangular or oval shape. , In an optimal temperature distribution vehicle capable of accommodating and transporting a large number of trays that can be used interchangeably as one of these divisions as a cold food portion and the other as a hot food portion, a tray storage width corresponding to the length of the tray The lower hinge in each of the pair of double-door type doors that are applied to the a) has a) a shaft receiving hole and an endless cam-shaped upper surface that repeats unevenness in the circumferential direction at intervals of 45 ° or more around the hole. The supporting cam block having is fixed to the door shaft position on the lower surface of the front frame of the car body, b) At the lower end of the corresponding rotating shaft side of the door, the lower surface corresponds to the unevenness of the supporting cam block. An endless cam-shaped rotating cam block formed to have a similar shaft receiving hole is brought into cam contact with the support cam block, and at the door closed position, the peaks and valleys of the cam surfaces of both blocks are mutually C) the lower hinge shafts are fitted in the shaft receiving holes of the two blocks aligned with each other, and at least one of the blocks and the shaft is maintained in a rotatable relationship with each other. An upper hinge provided on each of the pair of double doors corresponding to the lower hinge has an upper end on a rotation axis side of the corresponding door at a door axis position on an upper surface of a front frame of the main body of the vehicle. An appropriate temperature distribution, which is configured to rotatably support and equipped with elastic means for constantly pressing the door downward. Car door hinge structure.