JP3291336B2 - Insulated door - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulated door comprising, for example, a door of a vending machine for selling cooling and heating products, that is, an inner door for opening and closing a product storage and an outer door for opening and closing the vending machine main body. It is about.

[0002]

2. Description of the Related Art Conventional vending machine doors include an internal door that opens and closes a front opening of a product storage having a heat insulating structure, and an external door that supports the internal door and opens and closes a front opening of a vending machine main body. It is composed of The outer door is pivotally supported at its front end by a bracket pin attached to a pair of upper and lower brackets extending from the vending machine main body, and opens and closes the vending machine main body as an integral door together with the inner door. The internal door has a heat insulating structure in which a heat insulating material is filled, and is attached to the external door via a hinge attached to the inside of the external door so as to be freely opened and closed. A packing is attached to the peripheral part of the inner door on the product storage side,
When the internal door is closed, the packing comes into close contact with a breaker attached to the peripheral edge of the opening of the product storage, so that cold air or warm air can be prevented from leaking from a gap in the internal door.

[0003]

In such a conventional vending machine door, when closing, it is necessary to strongly press the packing of the inner door against the breaker on the side of the product storage box so as to firmly adhere to it. In order to achieve this close contact, the packing and breaker must be crushed by a predetermined amount, taking into account the distortion of the internal door, the wear and play of the bracket pins, the manufacturing variations of each member, etc. It is necessary to apply a pressing force to the internal door and to lock the internal door in that state. Therefore, closing and locking the door requires considerable human power.

[0004] On the other hand, the packing of the door comes into contact with the breaker from the bracket pin side as the door is closed, and when the closing of the door is completed, the entire packing contacts (closely contacts) the breaker. In a general vending machine, a bracket pin is provided near a front end side of a door so that a door end on a bracket pin side does not interfere with another adjacent vending machine when the door is opened. For this reason, the bracket pin and the packing are largely separated, that is, the turning radius of this portion becomes large, and when the door is closed, the packing on the bracket pin side (the portion) starts to contact, and until it is settled at a fixed position where the closing is completed. The breaker and the packing on the bracket pin side rub strongly. In particular, a large tensile force (frictional force) is generated between the gasket and the breaker in the packing at the upper and lower positions where friction occurs in the thrust direction.

Since this pulling force acts in a direction that does not close the door, considerable human force is required to overcome this force and completely close the door. That is,
In this type of vending machine, the door must be closed and locked with a force equal to or greater than the force of crushing the packing and the breaker and the force of overcoming the friction between the packing and the breaker. Was needed.

[0006] This is inevitable because this kind of vending machine closes and locks the door by a lever lock mechanism applying the principle of leverage. One-touch lock mechanism is used instead of the lever lock mechanism. In the case of using a double lock mechanism, the internal door is a lever lock mechanism and the external door is a one-touch lock mechanism.

On the other hand, in this type of vending machine, since the positional relationship of each part of the packing with respect to the bracket pin is fixed, the distortion of the internal door, the wear and play of the bracket pin, and the manufacturing variation of each member. Due to such factors, the pressing force of the packing against the breaker tends to be uneven. For this reason, the pressure of the door must be increased so as not to impair the original heat insulating property and sealing property of the packing and the breaker, or the internal door must have sufficient rigidity to cope with it.

The present invention has been made in view of such problems, and eliminates friction and enables close contact with a uniform force, thereby reducing the closing force without impairing heat insulation and sealing performance. Its purpose is to provide a small and insulated door.

[0009]

Means for Solving the Problems The present invention for achieving the above-front of the opening of the storage case, a thermal insulation door for opening and closing the pin as a fulcrum in a hinged door format, vertical centering pins
And rotatable external door about the axis, is disposed on the opening side of the outer door, by abutting the outer periphery of the opening in the front surface of the storage case, and an internal door for sealing the opening, this
Inner door can be moved left and right and tilted relative to outer door
Each to the outer door and the inner door to support it
A pair of left and right support members rotatably connected about a vertical axis, respectively , when the outer door is turned toward the opening and the opening is closed by the inner door, the inner door is
By the reaction force due to the contact on the outer periphery, the external door
As horizontal movement and tilting, the external door and the fixed link, and the interior door and an intermediate link, and a pair of left and right side links provided between the right and left pair of support members fixed link and the intermediate link, these 4 The four-link rotating mechanism is constituted by the plurality of links .

[0010]

[Action] The external door as a fixed link, the interior door and an intermediate link, a pair of support members as a pair of left and right side links provided between the fixed link and the intermediate link, depending on these four links, 4 By configuring the articulated rotation link mechanism, the inner door as the intermediate link is moved forward and backward, left and right, within the range restricted by the pair of left and right support members as the side link, with respect to the outer door as the fixed link. It becomes possible to tilt. Therefore, the outer door is gradually closed with the pin as a fulcrum, and when a part of the contact surface of the inner door hits a part of the receiving surface which is the outer peripheral portion of the opening in the front of the storage, the reaction force causes the inner door to be closed. against the door itself to the outside door, escape back-and-forth movement, and lateral movement and tilting eventually contact surface of the inner door is in close contact so as to follow the receiving surface of the storage case. For this reason, the contact surface of the internal door does not strongly rub against the receiving surface of the storage, and the contact surface of the internal door is uniformly pressed against the receiving surface of the storage.

On the other hand, when the outer door is gradually opened, even if the side of the inner door comes into contact with the door swallowing portion,
Similarly to the above, the reaction force causes the inner door itself to move forward and backward, move left and right, and tilt to escape, so that the side of the inner door does not interfere with the door swallowing portion or the like.

In addition, depending on the material of the contact surface of the inner door and the receiving surface of the storage, in order to further improve the adhesiveness, a sealing material such as a packing is attached to one or both of them. Is preferred.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing a heat insulating door according to an embodiment of the present invention; This vending machine is for automatically selling products such as canned coffee and canned juice. The door opens and closes the vending machine main body and also opens and closes a product storage box having an insulated structure. FIGS. 1 to 4 are plan views of the door. First, as shown in FIGS. 3 and 4, the door 1 directly opens and closes a portion of the front opening 102 of the product storage 101 corresponding to the product insertion port. Internal door 2 and vending machine body 1
00 and the external door 3 that opens and closes the front opening 103 of the vehicle. The front opening 102 of the product storage box 101 is composed of two doors, the inner door 2 and a door corresponding to the rack body, but the latter door is omitted here. .

A breaker 104 for receiving the internal door 2 is provided at a peripheral portion of the front opening 102 of the commodity storage 101 so as to border the front opening 102. Inside the front opening 103 of the vending machine main body 100 is a swallowing section 105 into which the internal door 2 and a part of the external door 3 are fitted. The lock arm 107 of the one-touch lock mechanism for locking the lock 3 is fixed. A receiving fitting for receiving the lock arm 107 of the one-touch lock mechanism is provided on the external door 3, but is omitted in the drawing.

As shown in FIG. 1 to FIG.
Is rotatably supported at its front end by a bracket pin 4 which is fixed to the vending machine main body 100 and penetrates a pair of upper and lower brackets 108 extending forward, so that it can be opened and closed in the form of a hinged door. I have. Although not shown, a product display, a selection switch,
A customer service section such as a coin insertion slot and a product sales slot is provided, and a coin mechanism, a control unit, and the like are provided on the inner back surface. Further, a plate-shaped door base 5 formed by bending a peripheral portion is fixed to an upper portion inside the outer door 3, and the inner diameter of the door base 5 is slightly smaller than that of the outer door 3. Door 2 is attached.

The inner door 2 has a heat insulating structure in which a packing 7 is attached to a door body 6 filled with a heat insulating material. When the inner door 2 is closed, the packing 7 104. The packing 7 is made of hollow rubber or soft vinyl chloride having fins on its outer surface so as to be crushed and adhere to the breaker 104, and is provided so as to border the peripheral edge of the door body 6. . As a result, it is possible to prevent cold air or warm air from leaking from the gap of the internal door 2. The inner door 2 has a door base 5 fixed to the upper part of the outer door 3 on both left and right sides thereof.
Are attached via a pair of support members.

A support member is fixed to an end of the door base 5 on the bracket pin 4 side (“left” side in the figure).
It comprises a support member 8 and a second support member 9 fixed to an opposite right end. As a result, the inner door 2 is integrally formed with the outer door 3, and is opened and closed integrally.

The first support member 8 includes an “L” -shaped external door-side metal member 21 having one end fixed to the door base 5, an internal door-side metal member 22 having one end fixed to the internal door 2, Intermediate fitting 23 interposed between door-side fittings 21 and 22
A first connecting pin 24 for connecting the outer door side fitting 21 and the intermediate fitting 23; an inner door side fitting 22 and the intermediate fitting 23;
And a second connecting pin 25 for connecting the two. The first connecting pin 24 and the second connecting pin 25 are
The first connection pin 24 is provided on the rear side, and the second connection pin 25 is provided on the front side. That is, the first support member 8 forms a special hinge having two fulcrums, whereby the left end of the inner door 2 is moved to the position shown in FIG.
Is moved a small amount in the oblique front-rear direction shown in FIG.

Similarly, the second support fitting 9 includes a flat outer door-side fitting 31 having one end fixed to the door base 5, an inner door-side fitting 32 having one end fixed to the inner door 2, and an inner and outer fitting. Intermediate fitting 3 interposed between door-side fittings 31 and 32
3, a first connecting pin 34 for connecting the outer door side fitting 31 and the intermediate fitting 33, an inner door side fitting 32 and the intermediate fitting 3
3 and a second connecting pin 35 for connecting the second connecting pin 3 to the second connecting pin 35.
The first connecting pin 34 and the second connecting pin 35 are brought close to the right front side of the inner door 2 so that the first connecting pin 34 turns to the right front corner of the inner door 2 and the second connecting pin 35 turns therefrom. It is provided on the right front of the inner door 2 respectively.
That is, the second support fitting 9 forms a special hinge having two fulcrums, whereby the right end of the inner door 2 is moved a small amount in the oblique front-rear direction shown in FIG. .

Referring now to FIG. 5, the mechanical relationship between the outer door 3, the inner door 2, the first support 8 and the second support 9 will be described. In the figure, the intermediate link A is the inner door 2, the side link B is the intermediate metal 23 of the first support metal 8, the side link C is the intermediate metal 33 of the second support metal 9, and the fixed link D is the external door ( Actually, a door base 5) 3 fixed to the external door 3 is shown, respectively, and the rotating pair a is the second connecting pin 25 of the first support fitting 8, and the rotating pair b is the second support fitting 9 Second connecting pin 3
5, the rotating pair c is the first connecting pin 24 of the first support fitting 8.
And the rotating pair d is the first connecting pin 34 of the second support fitting 9.
, Respectively.

That is, a total of four links including the intermediate link A, the pair of side links B and C, and the fixed link D, and a total of four rotations including the rotation pair a, the rotation pair b, the rotation pair c, and the rotation pair d. A so-called four-bar rotation link mechanism (four-bar rotation chain) is formed by the pair. In this four-section rotary link mechanism, both side links B and C constituting the intermediate brackets 23 and 33 of the first and second support brackets 8 and 9 are far more extreme than the intermediate link A constituting the internal door 2. The intermediate link A is composed of two side links B and C.
Within the range regulated by the formula (1), it is slightly moved back and forth, left and right, and tilted.

Therefore, for example, when a forward pushing force is applied to the right end of the intermediate link A, the entire intermediate link A moves rightward as shown by the arrow in the drawing, and the right half moves forward and the left half moves. The part tilts backward. Conversely, when a forward pushing force is applied to the left end of the intermediate link A, the intermediate link A
Moves to the left, the left half tilts forward, and the right half tilts rearward. Further, when a force (thrust force) pushing rightward on the intermediate link A is applied, the right half of the intermediate link A moves rightward and forward, and the left half moves rightward and backward. . Conversely, when a force (thrust force) that pushes the intermediate link A to the left is applied, the right half of the intermediate link A moves to the left and back, and the left half moves to the left and forward. Moving. Thus, the intermediate link A, ie, the inner door 2
The first and second supporting brackets 8,
Within the range regulated by the two intermediate fittings 23, 33, it is slightly moved in a direction in which it can escape.

FIGS. 3 and 4 show a series of movements of the internal door 2 accompanying the opening and closing of the door 1. FIG. As shown in FIG. 3, when the door 1 is open, the inner door 2 is entirely shifted to the left by a door pusher 10 described later, the left half thereof approaches the outer door 3, and the right half thereof is external. Door 3
In a tilted state away from When the door 1 is closed from this state, it gradually hits the breaker 104 of the product storage 101 from the packing 7 on the left side of the internal door 2. this
When the right half of the left packing 7 hits the breaker 104, the left half of the inner door 2 is pushed, and the inner door 2 gradually moves to the right while balancing this pressing force (reaction force). Meanwhile, the right half moves forward and the left half moves backward with respect to the external door 3 . As a result, as shown in FIG. 4, at a position where the pressing force (reaction force) of each part applied to the internal door 2 is balanced, the packing 7 is
4, the door 1 is completely closed.

In this case, as shown in FIGS.
A door pusher 10 is fixed to the back surface of the right end portion of the outer door 3, and the inner door 2 is constantly urged rearward by the door pusher 10 with a slight urging force. The door pusher 10 includes a fixing plate 41 fixed to the door base 5.
And a contact plate 42 that contacts the receiving groove 2a of the internal door 2;
It comprises a pin 43 for rotatably supporting the contact plate 42 with respect to the fixed plate 41, and a torsion spring 44 wound around the pin 43. The inner door 2 is moved by the door pusher 10 to the above-mentioned inclined position (FIG. 1 and FIG.
See). Therefore, as shown in FIG. 3, when opening and closing the door 1, the right end of the internal door 2 is connected to the swallowing part 105 of the vending machine main body 100 or the lock arm 1.
07 can be prevented.

As described above, according to the present embodiment, the intermediate doors 23, 33 of the inner door 2, the first and second support brackets 8, 9 are provided.
And the outer door 3 and the first and second connecting pins 24, 25, 34, 35 for connecting them constitute a four-bar rotary link mechanism. In response to the applied force, the first and second support members 8 and 9 are freely and minutely moved so as to escape within a range restricted by the intermediate metal members 23 and 33. Thereby, strong rubbing between the packing 7 of the internal door 2 and the breaker 104 of the product storage 101 is eliminated, and the door 1 can be closed and locked with a relatively small force. Moreover, since the packing 7 uniformly hits the breaker 104,
There is no need for a strong pressing force that assumes that the door 1 hits unevenly, and the door 1 can be closed and locked with a smaller force. Therefore, the door opening / closing operation of the operator becomes easy, and the burden of the load on the bracket pin 4 is reduced.

Further, since the closing force of the door 1 can be reduced, a one-touch lock mechanism can be adopted instead of the conventional lever lock mechanism without impairing the integrity of the outer door 3 and the inner door 2. Become.

Further, the door 1 is moved by the door pusher 10.
When the door 1 is opened, the inner door 2 can be moved to the left side and moved to the side, so that when the door 1 is opened and closed, the right end of the inner door 2 may interfere with the swallowing section 105 and the lock arm 107 of the vending machine main body 100. Absent. Therefore, the position of the bracket pin 4 can be sufficiently arranged on the front end of the outer door 3, and the thickness of the inner door 2 is not limited.

In this embodiment, the side links B,
The arrangement positions, shapes, lengths, and the like of C and the rotating pairs a, b, c, and d, that is, the intermediate fittings and the connecting pins, can be appropriately changed as long as the four-section rotary link mechanism is configured. Also,
The above structure may be applied to another door that opens and closes a part of the rack body below the product storage, in addition to the internal door that opens and closes a product input part at an upper part of the product storage,
Alternatively, as in the prior art, a door for opening and closing the product storage
The above structure may be applied to a single piece. further,
The present invention is not limited to the door of the vending apparatus, and it is needless to say that the present invention can be applied to various types of refrigerators, freezers, and refrigerators, both large and small.

[0029]

As described above, according to the heat-insulating door of the present invention, the external door, the internal door, and the pair of support members constitute a four-bar rotating link mechanism using the external door as a fixed link. On the other hand, the inner door is moved back and forth, right and left, and tilted appropriately to escape, so that the contact surface of the inner door does not strongly rub against the receiving surface of the storage box. The frictional force with the receiving surface is eliminated, and the closing force of the entire door can be reduced. Further, since the contact surface of the internal door is uniformly pressed against the receiving surface of the storage, even if the pressing force of the internal door is small, the closing power of the door is further reduced without impairing the heat insulating property and the sealing performance. can do. As a result, a lock mechanism other than the lock mechanism that applies the leverage principle can be adopted, so that the application range of the lock mechanism is widened and the door opening / closing operation can be easily performed.

Further, since the side portion of the internal door does not interfere with the door swallowing portion due to the forward / backward movement, left / right movement or tilting of the internal door, the position of the pin serving as a fulcrum for opening and closing and the thickness of the internal door are provided. This has the effect of improving the degree of freedom.

[Brief description of the drawings]

FIG. 1 is an enlarged plan view of a door of a vending machine according to an embodiment of the present invention.

FIG. 2 is an enlarged plan view of the door of the vending machine showing the movement of the internal door.

FIG. 3 is an enlarged plan view of a door of the vending machine in an open state.

FIG. 4 is an enlarged plan view of a vending machine door in a closed state.

FIG. 5 is a conceptual diagram mechanically showing the movement of an internal door.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Door 2 Internal door 3 External door 4 Bracket pin 8 1st support fitting 9 2nd support fitting 101 Product storage 102 Front opening A Middle link B Side link C Side link D Fixed link

Claims (1)

(57) [Claims] An insulated door that opens and closes an opening on the front surface of a storage with a pin as a fulcrum in the form of an open door, wherein the outer door is rotatable around a vertical axis about the pin, and An inner door that is disposed on the opening side and seals the opening by contacting the outer peripheral portion of the opening on the front surface of the storage, and moves the inner door left and right with respect to the outer door and tilts the inner door.
Each of the outer doors and the front door are movably supported.
The inner doors can be pivoted about a vertical axis.
A pair of left and right supporting members connected to each other, wherein the outer door is rotated toward the opening, and the inner door contacts the outer peripheral portion when the opening is closed by the inner door. Against the external door
So that the outer door is a fixed link, the inner door is an intermediate link, and the pair of left and right support members is a pair of left and right side links provided between the fixed link and the intermediate link. And these four links
Thermal insulation door, characterized in that 4-bar linkage mechanism is constituted by.