JP6433724B2 - Insulation cart door device - Google Patents

Description

  The present invention relates to a door device for a heat-insulating cart applied to a refrigeration apparatus.

The thing of the following patent document 1 is known as an example of the conventional cold storage apparatus. This includes a heat-insulating cart with casters for storing trays, and a stationary station that is equipped with a cooling unit and a heating unit and stores the heat-insulating cart so that it can be taken in and out.
More specifically, an insulated cart is divided into a warm room and a cold room with a heat-insulating partition wall inside the insulated cart body with an open / close door. Separately arranged trays are stored in a plurality of stages in a form extending through the partition wall and extending between the warm room and the cold room. On the other hand, on the ceiling of the station, a first heat exchange chamber equipped with a cooling unit, a heating unit and a circulation fan, and a second heat exchange chamber equipped with a cooling unit and a circulation fan are partitioned and formed side by side. When the cart is stored in the station, an air circulation path is individually formed between the first heat exchange chamber and the cold storage chamber and between the second heat exchange chamber and the cold storage chamber. .

  As an example of use, hot and cold foods prepared for cooking and the like are placed in a tray, each tray is stored in an insulated cart (cart body), the door is closed, and then the insulated cart is placed in the station. Subsequently, when the operation is started, first, cold air is circulated and supplied to both the cold storage room and the cold storage room, so that both hot food and cold food placed on the tray are refrigerated (chilled). When the predetermined time has elapsed from the serving time, the hot food is reheated by circulating warm air in the hot room, while the cold food is continuously stored in the cold room. After the operation is stopped, when the serving time is reached, the heat insulating cart is pulled out of the station, and the tray is taken out by opening the open / close door so that it can be served.

JP 2014-40937 A

The heat insulating cart described in Patent Document 1 has a structure in which the front and rear surfaces of the cart body are opened, and a pair of doors are supported in each opening so as to be swingable and openable. Is supported so as to be able to swing from a closed position in which the opening is closed in parallel with the opening surface of the opening toward an opening position around the side surface of the cart body.
In the case of such a structure, the door is swingably opened and closed around a support shaft arranged along the vertical edge of the opening, but it should be fully opened until 270 degrees until the door hits the side surface of the cart body. Then, the support shaft needs to be disposed at a position protruding outward in the frontage direction from the side surface of the cart body at the vertical edge of the opening. In this case, it is necessary to widen the entrance / exit of the station so as not to obstruct the support shaft when the doors are closed and the insulated cart is put in and out of the station, resulting in an increase in the size of the station.

In order to avoid this, when the support shaft is provided at a position retracted inward from the side surface of the cart body, the base end side of the door hits the corner of the vertical edge in the opening and more than before opening 270 degrees. Even if the door is fully opened, that is, even if the door is fully opened, it is not possible to take a posture that exactly hits the side surface of the cart body, and only takes an oblique posture in which the swing end side is open. Then, when a plurality of heat-insulating carts with the doors fully opened are arranged on the floor or the like outside the station, they cannot be brought close together, and there is a concern that a space disadvantage may be incurred.
The present invention has been completed based on the above circumstances.

  According to the present invention, an opening of a cart body comprising a heat insulating box is provided on a side surface of the cart body from a closed position in which a door is closed by a support shaft arranged along a vertical edge of the opening. The support shaft is supported so as to be swingable toward the open position, and the door can be held at a half-open position opened by a predetermined angle by a lift hinge provided coaxially with the support shaft. The door is arranged at a position retracted inside the frontage direction at the vertical edge of the opening, and the door is composed of a door body and a rotary shaft body arranged side by side on the base end side of the door body, The rotating shaft body is supported by the support shaft, and adjacent ends of the rotating shaft body and the door body are coupled to each other via a hinge, and the hinge includes the rotating shaft body and the door body. Turn the hinges so that they are arranged in a straight line An urging portion for urging is provided, and the urging portion is opened while maintaining the state in which the rotating shaft body and the door main body are aligned in a straight line against the load of the lift hinge. It has an urging force capable of swinging in the door direction, and holds the door body in contact with the side surface of the cart body between the door body and the side surface of the cart body. It is characterized in that a magnetic attracting part is provided.

  According to the above configuration, when the door in the closed position is opened, the door swings around the support shaft while maintaining the posture in which the rotating shaft body and the door body are linearly connected, and the side surface of the cart body When the rotary shaft reaches the fully open position, the rotary shaft hits the outer corner of the vertical edge of the opening and stops further swinging, and further swings in the direction of opening the door body, leaving the rotary shaft. Thus, only the door body is opened around the hinge shaft against the urging force, and when it hits the side surface of the cart body, it is held in the contact state, that is, in the fully open position by the magnetic adsorption portion.

By adopting a biaxial support structure of a support shaft and a hinge, the door body can be held in a posture along the side surface of the cart body in the fully open position. When a plurality of insulated carts with the doors fully opened are arranged, they can be brought close together, which can contribute to space saving. Further, when the heat-insulating cart is moved in the fully opened state, the possibility of hitting the door against the surrounding wall or fixtures is reduced, and the door can be moved stably.
The hinges are equipped with a biasing force that can keep the rotating shaft body and the door body aligned in a straight line against the load of the lift hinge. It can be carried out.

The following configuration may also be used.
(1) The doors are respectively mounted on the left and right vertical edges of the opening of the cart body.
(2) The doors are respectively mounted on the left and right vertical edges of the opening of the cart body.
(3) The hinge provided with the biasing portion is mounted in a form in which a hinge with a spring is inverted from a natural state.
(4) The hinge provided with the urging portion is a torque hinge.

  According to the present invention, when the door is fully opened, it can be held in a posture along the side surface of the cart body.

1 is an exploded perspective view of a refrigeration apparatus according to Embodiment 1 of the present invention. Front view with cart stored in station Cross section during operation Perspective view of the cart body Partial perspective view of the cart body with the door fully open Front view showing the structure of the shaft support part of the door Same perspective view The perspective view which shows the structure of the lower end part of a door Top view of the cam plate constituting the lift hinge Development sectional view showing engagement state of cam part in lift hinge Partial plan view with door closed Partial plan view showing a state immediately before the door is fully opened Partial plan view with the heat insulation door fully opened The perspective view which shows the structure of the pivotal support part of the door which concerns on Embodiment 2. FIG. Partial plan view with door closed Partial plan view showing a state immediately before the door is fully opened Partial plan view with the door fully open Front view of the door according to the third embodiment The perspective view which shows the structure of the pivotal support part of the door which concerns on Embodiment 4. FIG. Partial plan view with door closed Partial plan view showing a state immediately before the door is fully opened Partial plan view with the door fully open The perspective view which shows the structure of the pivotal support part of the door which concerns on Embodiment 5. FIG. The perspective view which shows the structure of the attachment part of the hinge pin which concerns on Embodiment 6. FIG. Partial perspective view showing a state in the middle of opening the door Partial plan view Partial perspective view with the door fully open Partial plan view Side view of the cart body with the rear door fully open

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, the cart used for a cold storage apparatus is illustrated.
As shown in FIGS. 1 to 3, the refrigeration / heating apparatus includes a cart 10 for storing the tray T and a station 30 for storing the cart 10 in a removable manner.
The cart 10 further includes a cart body 11 formed of a heat insulating box and a frame cart 20 that stores the tray T. The cart body 11 is open on both front and rear sides, and a pair of heat-insulating doors 12 are attached to each opening 11A in a double door manner, and a caster 13 is provided on the bottom surface. The opening / closing structure of the door 12 will be described in detail later.

The frame cart 20 has a structure in which metal frames 23 are raised from the left and right side edges of the bottom plate 21 provided with casters 22, and can be inserted into and removed from the front side of the cart body 11. A heat insulating partition wall 24 is provided in a substantially central portion in the left-right direction of the frame cart 20 over the entire front-rear direction. The partition wall 24 has a shape in which a plurality of unit partition walls 24A are stacked, and the tray T is stored in a plurality of stages while penetrating between the upper and lower unit partition walls 24A from both the front and rear surfaces. Yes.
In the state where the frame cart 20 is stored in the cart body 11, as shown in FIG. 3, the interior of the cart body 11 is divided into left and right by a partition wall 24, and a warming room 25H is located on the left side of the partition wall 24. A refrigerator compartment 25C is formed.

The station 30 has a substantially box shape with an open front, and the cart 10 can be taken in and out through the front opening. A first heat exchange chamber 31 and a second heat exchange chamber 32 are partitioned and formed side by side on the ceiling portion of the station 30, and the left first heat exchange chamber 31 is arranged above the warming chamber 25 </ b> H. Is provided with a cooler (not shown) and a heater 34, while the second heat exchange chamber 32 on the right side disposed above the refrigerator compartment 25C is provided with only a cooler (not shown). ing. Circulating fans 35H and 35C are provided in the heat exchange chambers 31 and 32, respectively.
Both coolers are connected in parallel to a refrigeration apparatus 37 including a compressor 38 and the like installed in the machine room 36 of the station 30 via an on-off valve.
A duct 40 that can be moved up and down is provided on the lower surface of the ceiling of the station 30.

  When the cart 10 is accommodated in the station 30 and the duct 40 is lowered, as shown in FIG. 3, the air in the cabinet passes from the ceiling of the warm room 25 </ b> H between the first heat exchange room 31 and the warm room 25 </ b> H. As a result, a first air circulation path 41 is formed in which air exchanged by circulating the first heat exchange chamber 31 through the first heat exchange chamber 31 is driven from the side surface of the warm storage chamber 25H, and the second heat exchange chamber 32 is formed. Between the refrigeration room 25C and the refrigeration room 25C by drawing air from the ceiling of the refrigeration room 25C and circulating it through the second heat exchange chamber 32 so as to drive air from the side of the refrigeration room 25C. An air circulation path 42 is formed. When the cart 10 is taken in and out, the duct 40 is released upward as shown in FIG.

  An example of the usage form of the refrigerated storage apparatus will be described. Hot food and cold food prepared for cooking and the like are stacked on the tray T, each tray T is stored in the frame cart 20, and the frame cart 20 is stored in the cart body 11. The storage cart 10 is configured by closing the door 12 after the storage. After the cart 10 is placed in the station 30 (FIG. 2), the duct 40 is lowered (FIG. 3), and then the operation is started. First, cold air is circulated and supplied to both the warm room 25H and the cold room 25C. Thus, both hot and cold foods placed on the tray T are refrigerated (chilled). When the time is a predetermined time before the serving time, the hot food is reheated by circulating warm air in the warm room 25H, while the cold food is continuously stored in the cold room 25C. When it is time to serve after the operation is stopped, after the duct 40 is released upward (FIG. 2), the cart 10 is pulled out from the station 30, the door 12 is opened, and the tray T is taken out. It has come to be offered.

Next, an opening / closing support structure for the door 12 provided on the cart body 11 constituting the cart 10 will be described. As described above, as shown in FIG. 4, a pair of left and right doors 12 are attached to the front and rear openings 11 </ b> A of the cart body 11 so as to be openable and closable.
Each door 12 roughly has a structure in which a rotary shaft body 55 is integrally coupled to a base end edge of a heat-insulating door body 50 via a hinge 60, and the door 12 has a base end side (rotary shaft body). 55) are supported so as to be swingable through hinge portions 70, respectively.
As shown in FIG. 2, a handle 15 made of a recess is provided at a position near the adjacent edge on the surface of the door 12 (door body 50) that makes a pair.

Hereinafter, the door 12 on the front side and the right side as viewed from the front will be described as an example. The door body 50 is formed in a vertically long rectangular shape that can cover the right half region of the opening 11 </ b> A of the cart body 11. As shown in FIG. 7, the rotating shaft body 55 has a shape in which a band-shaped metal plate having a width substantially equal to the thickness of the door body 50 is bent into an L shape.
As shown in FIGS. 6 and 7, at one end of the base end surface 50A of the door body 50, one surface (fixed surface 52A) of the mounting plate 51 having an angle shape is provided on the upper and lower ends, and the other surface (projecting surface 52B) is the door body. It is fixed in an overhanging posture along the back surface of 50.

  On the other hand, the upper and lower rotary shafts 55 are arranged such that each vertical surface 56B comes into contact with the fixed surface 52A of the mounting plate 51 at a position where the horizontal surface 56A is substantially flush with the upper surface or the lower surface of the door body 50. A hinge 60 is mounted between the projecting surface 52B of the mounting plate 51 and the vertical surface 56B of the rotating shaft body 55. The hinge 60 is a hinge with a spring. However, each blade 61 of the hinge 60 is attached to the mounting plate 51 from a state in which a large urging force is accumulated by reversing 180 ° from a natural state (a state where no torque is applied). The overhanging surface 52B and the vertical surface 56B of the rotary shaft 55 are fixed with screws.

Accordingly, as shown in FIGS. 7 and 11, the door 12 has a vertical surface 56 </ b> B of the rotary shaft body 55 and a fixed surface 52 </ b> A of the mounting plate 51, with the axis S <b> 2 (second axis) of the hinge 60 as the center. By swinging and biasing in the approaching direction, the both surfaces 56B and 52A are held in a joined state by the biasing force, and at that time, the rotary shaft body 55 and the door body 50 are linearly coupled.
On the other hand, as shown in FIG. 13, the door 12 has a vertical surface 56 </ b> B of the rotary shaft body 55 and a fixed surface 52 </ b> A of the mounting plate 51 centering on the axis S <b> 2 of the hinge 60 against the biasing force of the hinge 60. It is possible to bend from the joint portion while being separated from each other. The biasing force of the hinge 60 will be described later.

The upper and lower hinge portions 70 will be described. As shown in FIG. 6, the upper hinge portion 70 </ b> U has a mounting hole (FIG. 6) in which a bracket 72 projects from the upper end portion of the vertical edge 71 of the opening 11 </ b> A of the cart body 11. (Not shown), the upper hinge pin 74U is fitted downward. The axis S1 (first axis) of the upper hinge pin 74U is located on the front side of the predetermined dimension on the surface of the vertical edge 71 and slightly outside the side surface 11B of the cart body 11 (inside the side edge of the top wall 14). Yes.
On the other hand, a bearing hole 57 (FIG. 7) is formed at the tip of the horizontal surface 56 </ b> A of the upper rotating shaft body 55, and the upper hinge pin 74 </ b> U is fitted into the bearing hole 57. It is rotatably supported around a 74U axis S1.

  A lift hinge 80 is attached to the lower hinge portion 70D. As shown in FIG. 8, a bracket 72 projects from the lower end portion of the vertical edge 71 toward the front side, and a lower hinge pin 74D and an upper hinge pin 74U are attached to an attachment hole (not shown) opened in the bracket 72. The lower hinge pin 74D is fitted into a bearing hole (not shown) formed at the tip of the horizontal surface 56A of the lower rotary shaft 55. Thus, the rotary shaft body 55 is supported so as to be rotatable around the axis S1 of the lower hinge pin 74D.

In order to constitute the lift hinge 80, a cam plate 81 is fixed to the upper surface of the lower bracket 72 as shown in FIG. The cam plate 81 is provided with an insertion hole 82 arranged concentrically with the mounting hole of the bracket 72. An annular cam portion 83 is formed at the hole edge on the upper surface of the insertion hole 82 as shown in FIG. Is formed. As shown in FIG. 10, the cam portion 83 has a closed position Pa (0 ° position), a half-open position Pb spaced by 105 ° counterclockwise from the closed position Pa, and the half-open position. Concave portions 84 are formed at three convenient positions with the opening position Pc of 155 ° (260 ° from the closed position Pa) in the same direction from the position Pb.
On the other hand, a ring-shaped follower portion 85 that is rotatably mounted on the cam portion 83 of the cam plate 81 is formed at the hole edge portion of the lower surface of the bearing hole of the lower rotary shaft body 55. A single protrusion 86 that can be fitted into the recess 84 of the cam portion 83 is formed at 85.

In other words, the door 12 is supported so as to be able to swing open and close about the first axis S <b> 1 by fitting the bearing holes 57 of the upper and lower rotary shaft bodies 55 to the upper and lower hinge pins 74 </ b> U and 74 </ b> D.
The lift hinge 80 functions as follows. When the door 12 is in the closed position that closes the opening 11 </ b> A, as shown schematically in FIG. 10A, the protrusion 86 of the follower portion 85 provided on the rotary shaft 55 is connected to the cam portion of the cam plate 81. It fits in the first recess 84A of 83 and is held in the same position. When the door 12 swings and opens from the closed position, as shown in FIG. 5B, the protrusion 86 of the follower portion 85 comes out of the first recess 84A and rides on the upper surface of the cam portion 83 and slides. The door 12 is held at the half-open position opened by 105 ° by fitting in the second recess 84B when it is rotated. When the door 12 is further swung open, the protrusion 86 of the follower portion 85 comes out of the second recess 84B and rides on the upper surface of the cam portion 83 and slides. It is fitted and held in 84C.

Here, when the lift hinge 80 functions, particularly when the protrusion 86 of the follower portion 85 rides on the upper surface of the cam portion 83 from the recess 84, it is appropriate to suppress the rotation of the rotary shaft body 55. The load of acts.
On the other hand, the rotary shaft body 55 and the door main body 50 are connected to each other by a hinge 60 having an urging force so that the rotary shaft body 55 can remain bent depending on the load applied to the rotary shaft body 55. The door body 50 is bent, and the door 12 cannot be opened properly.
Therefore, in this embodiment, the urging force applied to the hinge 60 is set to be larger than the load applied to the rotating shaft body 55. In other words, the door 12 is connected to the lift hinge 80 (the rotating shaft body 55) on the hinge 60. The urging force that can swing in the door opening direction is maintained while maintaining the state where the rotary shaft body 55 and the door body 50 are linearly coupled against the load applied to (). In the present embodiment, it is only necessary that the total biasing force provided to the upper and lower hinges 60 exceeds the load applied to the lift hinge 80 (rotating shaft body 55).

As shown in FIGS. 4 and 11, the upper surface on the swing end side of the door main body 50 constituting the door 12 is locked to a locking portion 16 provided on the ridge of the top wall 14 of the cart main body 11. A latch lock 17 is provided to lock the door 12 in the closed position. On the other hand, as shown in FIG. 8, a magnet 76 that attracts the side surface 11 </ b> B of the cart body 11 is attached to the lower surface of the door body 50 on the swing end side. The magnet 76 is attracted to the side surface 11B of the cart main body 11 when it is opened until it takes a parallel posture with the side surface 11B, and the door main body 50 is held in the same posture.
The open / close support structure for the other three doors 12 including the lift hinge 80 is the same.

  Next, the operation of this embodiment will be described. When the cart 10 is taken in and out of the station 30, all four doors 12 are closed. When the door 12 is in the closed position, as shown in FIG. 11, the door 11 is closed in parallel with the opening surface of the opening 11A, is held in the closed position by the lift hinge 80, and is locked by the latch lock 17. The

In the case of opening the door in contact with the arrangement etc., from the state shown in FIG. 11, after removing the latch lock 17, the user holds the handle 15 and pulls the door 12 to open.
The door 12 is centered on the axis S1 (first axis) of the hinge pin 74 while maintaining the state in which the rotary shaft body 55 and the door body 50 are integrally coupled in a linear manner against the load of the lift hinge 80. When the rocker swings by 105 °, it is temporarily stopped by the lift hinge 80 and held at the half-open position. Depending on conditions such as a space, etc., the door 12 may be left in the half-open position and applied to the laying and lowering.

When the door 12 is fully opened, when the door 12 is further opened from the half-opened position, the axis S1 (first axis) of the hinge pin 74 is maintained while the rotary shaft 55 and the door body 50 are continuously connected in a straight line. At the center, it swings and opens so as to wrap around the side surface 11B of the cart body 11. When the door 12 is opened by 260 °, as shown in FIG. 12, the rotation shaft body 55 comes into contact with the outer corner of the vertical edge 71 of the opening portion 11 </ b> A, so that the further swinging is stopped. Held in the same position.
When the door 12 (door main body 50) is further pushed in the opening direction from the state of FIG. 12, the door main body 50 resists the urging force while leaving the rotary shaft 55, and the axis S2 (second axis) of the hinge 60 As shown in FIG. 13, when the door body 50 takes a parallel posture with the side surface 11B of the cart body 11, the magnet 76 is attracted to the side surface 11B, and the door body 50 is The so-called fully open posture is maintained.

  When the door 12 is closed from the fully opened position in FIG. 13, when the door body 50 is swung so as to be peeled off from the side surface 11B of the cart body 11 against the magnetic attraction force of the magnet 76, as shown in FIG. Since the door 12 in which the rotary shaft 55 and the door body 50 are linearly coupled is formed by the biasing force of the hinge 60, the door 12 is continuously closed with the opening 11A around the axis S1 of the hinge pin 74. It is only necessary to oscillate.

According to the present embodiment, the door 12 is opened and closed by the biaxial support structure of the hinge pin 74 and the hinge 60, so that the door body 50 abuts along the side surface 11B of the cart body 11 in the fully opened position. Can be kept in a state. Therefore, when a plurality of carts 10 with the doors 12 fully opened are arranged, they can be brought close together, which can contribute to space saving. Further, when the cart 10 is moved in the fully opened state, the possibility of hitting the door 12 against the surrounding walls and fixtures is reduced, and as a result, smooth movement is ensured.
The hinge 60 is provided with an urging force that can maintain a state in which the rotary shaft body 55 and the door body 50 are joined in a straight line against the load of the lift hinge 80. Opening and closing operations can be performed smoothly and appropriately.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIGS. In this Embodiment 2, compared with the said Embodiment 1, the change is added to the hinge which connects the rotating shaft body 55 and the door main body 50 which comprise the door 12. As shown in FIG. Hereinafter, differences from the first embodiment will be mainly described, and portions and members having the same functions as those of the first embodiment will be denoted by the same reference numerals, and redundant description will be omitted or simplified.

  In the second embodiment, the torque hinge 65 is applied as a hinge. As shown in FIG. 14, the torque hinge 65 has a structure in which a pair of oscillating bodies 66 having a channel shape are assembled so as to be able to oscillate around a shaft body 67 in a posture facing each other. In addition, torque (biasing force) is applied in a direction in which both swinging bodies 66 take a posture in which they face each other. Each swinging body 66 of the torque hinge 65 is fixed to the base end surface 50A of the door main body 50 and the vertical surface 56B of the rotary shaft body 55 arranged to face the base end surface 50A.

  Accordingly, as shown in FIG. 15, the door 12 takes a form in which the rotating shaft body 55 and the door main body 50 are linearly integrated by the urging force of the torque hinge 65. On the other hand, as shown in FIG. 17, the door 12 can be displaced so as to bend around the axis S <b> 2 (second axis) of the torque hinge 65 against the urging force of the torque hinge 65. The biasing force of the torque hinge 65 is set to be larger than the load applied to the lift hinge 80 shown in the first embodiment.

  The operational effects of the second embodiment are as follows. When the handle 15 is opened from the closed state shown in FIG. 15, the rotary shaft body 55 and the door body 50 are integrally coupled in a straight line against the load of the lift hinge 80. While maintaining the above-described state, when the hinge pin 74 swings about the axis S1 (first axis) and is released and approaches the fully open position, the rotary shaft body 55 is moved vertically to the opening 11A as shown in FIG. Further contact with the outer corner of the edge 71 stops the swing, and further, when the door opening operation is continued, the door body 50 resists the urging force with the rotary shaft 55 remaining, and the torque hinge 65 When the door body 50 is swung so as to be bent about the axis S2 (second axis) and the door body 50 takes a parallel posture with the side surface 11B of the cart body 11, a magnet (see FIG. (Not shown) is attracted to the side surface 11B, and the door body 50 is in the fully open position. It is equity.

  Since the opening / closing support structure of the door 12 is a biaxial support structure of the hinge pin 74 and the torque hinge 65, the door body 50 can be held in contact with the side surface 11B of the cart body 11 in the fully opened position. The torque hinge 65 is provided with an urging force that can maintain a state where the rotary shaft body 55 and the door body 50 are joined in a straight line against the load of the lift hinge 80. Can be opened and closed smoothly and properly.

<Embodiment 3>
FIG. 18 shows Embodiment 3 of the present invention. The third embodiment should be referred to as a modification of the first embodiment, and the upper and lower rotary shaft bodies 55 are integrally coupled by a vertically connecting plate 58. With such a structure, when the door body 50 swings while displacing the hinge 60 immediately before the fully open position, both the hinges 60 can be displaced simultaneously instead of separately, and thus the door body 50 is twisted. Can be swung without any problem.

<Embodiment 4>
A fourth embodiment will be described with reference to FIGS. The fourth embodiment is suitable for use in, for example, a door opening / closing device that does not include a lift hinge.
In Embodiment 4, it arrange | positions so that the vertical surface 56B of the rotating shaft body 55 may join to 50 A of base end surfaces of the door main body 50, and each blade | wing 101 of the hinge 100 with a spring is the vertical surface 56B of the rotating shaft body 55. And fixed to the base edge of the back surface of the door body 50 by screws.

  Accordingly, as shown in FIG. 20, the door 12 has the vertical surface 56 </ b> B of the rotary shaft 55 and the base end surface 50 </ b> A of the door body 50 approaching each other around the axis S <b> 2 (second axis) of the hinge 100 with spring. The both surfaces 56B and 50A are held in a joined state by the urging force, that is, the rotary shaft body 55 and the door body 50 are integrated linearly. On the other hand, as shown in FIG. 22, the door 12 resists the biasing force of the hinge 100, and the vertical surface 56 </ b> B of the rotary shaft body 55 and the door main body 50 around the axis S <b> 2 (second axis) of the hinge 100. The base end surface 50A can be bent from the joint portion while being separated from each other.

  In order to hold the door body 50 on the side surface 11B of the cart body 11 in a fully open position, the surface of the door body 50 (when fully opened) is placed at the lower position of the side surface 11B of the cart body 11 contrary to the first embodiment. A magnet 103 that can be attracted is attached to a lower position on the swinging edge side of the cart body 11 on the side facing the side surface 11B.

The operational effects of the fourth embodiment are as follows. When the door is opened from the closed state shown in FIG. 20, the door 12 swings around the axis S1 (first axis) of the hinge pin 74 while maintaining the state where the rotary shaft body 55 and the door body 50 are linearly coupled. When it is moved and released and approaches the fully open position, as shown in FIG. 21, the rotation shaft body 55 hits the outer corner of the vertical edge 71 of the opening 11A and stops further swinging. When the operation is continued, the door body 50 is swung so as to be bent about the axis S2 (second axis) of the hinge 100 against the urging force while leaving the rotating shaft 55, as shown in FIG. Further, when the door main body 50 takes a parallel posture with the side surface 11B of the cart main body 11, it is magnetically attracted by the magnet 103, and the door main body 50 is held in the fully open posture.
Since the opening / closing support structure of the door 12 is a biaxial support structure of the hinge pin 74 and the hinge 100 with the spring, the door body 50 can be held in contact with the side surface 11B of the cart body 11 in the fully opened position.

<Embodiment 5>
FIG. 23 shows Embodiment 5 of the present invention. In the fifth embodiment, instead of the structure in which the door main body 50 and the rotary shaft body 55 are connected by a hinge with a spring, the door main body 50 and the rotary shaft body 55 are connected by a normal hinge 110 having no urging force, By providing this, a coupling force that holds the rotary shaft body 55 and the door body 50 in a linearly coupled form is obtained.
The structure of the fifth embodiment can also be applied to a door opening / closing device provided with a lift hinge 80 by setting a large magnetic attraction force of the magnet 111.

<Embodiment 6>
A sixth embodiment of the present invention will be described with reference to FIGS. In the front and rear openings 11A of the cart body 11, a pair of doors 12 are supported so as to be swingable from a closed position that closes the opening 11A to an open position that wraps around the side surface 11B of the cart body 11. As exemplified in the fourth embodiment, the depth of the cart body 11 can be obtained even when the door body 50 can be fully opened by adopting a parallel posture with the side surface 11B of the cart body 11 by adopting the biaxial support structure. Is short, the swinging ends of the door main body 50 in the front and rear doors 12 overlap with each other, and the front and rear door main bodies 50 cannot be fully opened taking a parallel posture with the side surface 11B of the cart main body 11.

  The sixth embodiment provides a solution to the problem, and is devised for the open / close support structure of the rear door 12. The door 12 has a biaxial support structure with a hinge pin 74 and a hinge 100 with a spring, as in the fourth embodiment. However, in the sixth embodiment, as shown in FIGS. 24 and 26, the hinge pin 74 is attached. A stopper 120 that abuts against the side edge of the horizontal surface 56 </ b> A of the rotating shaft body 55 is suspended from the outer edge of the bracket 72.

  The effects of the sixth embodiment are as follows. The rear door 12 in the closed position is opened by being swung around the axis S1 (first axis) of the hinge pin 74, and as shown in FIGS. 25 and 26, is opened to a position slightly exceeding 90 °. Then, the rotating shaft body 55 hits the stopper 120 and further swinging is stopped. When the door opening operation is further continued, the door body 50 swings toward the side surface 11B of the cart body 11 around the axis S2 (second axis) of the hinge 100 against the urging force with the rotating shaft body 55 remaining. 27 and 28, when the door main body 50 takes a parallel posture with the side surface 11B of the cart main body 11, it is magnetically attracted by a magnet (not shown), and the door main body 50 is brought into a fully open posture. Retained.

  As described above, by providing the bracket 72 with the stopper 120 for stopping the swinging of the rotating shaft body 55, the shaft S2 (second shaft) of the hinge 100 which becomes the swinging fulcrum of the door body 50 thereafter is the cart. It stays at a position farther away from the rear of the main body 11. Therefore, as shown in FIG. 29, the door main body 50 of the rear door 12 is applied along the side surface 11B of the cart main body 11 in a back-rear form, and a space is gained in front thereof. Therefore, both the door main bodies 50 of the front and rear doors 12 can be fully opened by taking a parallel posture with the side surface 11B of the cart main body 11.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) The opening provided with the door may be of a type provided on only one surface such as the front surface.
(2) One door may be supported in a single-opening manner in the opening.
(3) The present invention can be similarly applied to a heat insulating cart that constitutes a main body portion of a cold / warm distribution vehicle integrally provided with a cooling portion and a heating portion.

  DESCRIPTION OF SYMBOLS 10 ... Cart (insulation cart) 11 ... Cart main body 11A ... Opening part 11B ... (Side of cart main body 11) 12 ... Door 50 ... Door main body 55 ... Rotating shaft 60 ... Hinge with spring (hinge) 65 ... Torque hinge (hinge) 70 ... Hinge part 71 ... Vertical edge (of opening 11A) 74 ... Hinge pin (support shaft) 76 ... Magnet (magnetic adsorption part) 80 ... Lift hinge S1 ... Shaft (of hinge pin 74) S2 ... (of hinges 60 and 65) )axis

Claims (5)

At the opening of the cart body made of a heat insulating box, the door is moved from the closed position to close the opening to the side of the cart body by the support shaft arranged along the vertical edge of the opening. The door is swingably supported, and the door can be held in a half-open position opened by a predetermined angle by a lift hinge provided coaxially with the support shaft.
The support shaft is disposed at a position retracted inside the frontage direction at the vertical edge of the opening,
The door is composed of a door body and a rotating shaft body arranged side by side on the base end side of the door body,
The rotating shaft body is supported by the support shaft, and adjacent ends of the rotating shaft body and the door body are coupled to each other via a hinge,
The hinge is provided with a biasing portion that pivots and biases the hinge so that the rotary shaft body and the door body are arranged in a straight line.
The urging portion has a urging force that allows the door to swing in the door opening direction while maintaining the state where the rotary shaft body and the door main body are arranged in a straight line against the load of the lift hinge. Have
Between the door body and the opposing surface of the side surface of the cart body, a magnetic adsorption unit that holds the door body in contact with the side surface of the cart body is provided ,
Using the support shaft as an axis, the rotating shaft body is rotated from the closed position to a position around the side surface of the cart body,
At a position where the rotary shaft wraps around the side surface of the cart body, the hinge is bent against the urging force of the urging portion, and the door body is in a posture parallel to the side surface of the cart body. And the door body of the heat insulating cart is configured so that the door main body is attracted to the magnetic attracting portion to be in the open position . 2. The door device for an insulated cart according to claim 1, wherein the doors are respectively mounted on the left and right vertical edges of the opening of the cart body. The said cart main body is provided with the said opening part by which the said door was mounted | worn on front and back both surfaces, The door apparatus of the heat insulation cart of Claim 1 or Claim 2 characterized by the above-mentioned. The heat insulation according to any one of claims 1 to 3, wherein the hinge provided with the urging portion is mounted in a form in which a hinge with a spring is inverted from a natural state. Cart door device. The said hinge provided with the said urging | biasing part is a torque hinge, The door apparatus of the heat insulation cart as described in any one of Claim 1 thru | or 3 characterized by the above-mentioned.

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