JP4104581B2 - Door opening and closing device - Google Patents

Description

  The present invention relates to a door opening / closing device that is applied to a storage such as an ice making machine or a refrigerator and that closes a front opening of a storage chamber configured therein so as to be freely opened and closed by a door that moves in a vertical direction.

  Conventionally, in an automatic ice maker used in a kitchen of a hotel or restaurant, for example, ice generated by a reverse cell type ice maker is stored in an ice storage configured in the main body, and the front opening of this ice storage The door that can be freely opened and closed is opened to take out ice. In addition, since this door requires a space for opening and closing, there are many types of ice making machines that open and close the opening of the ice storage with a door that moves in the vertical direction.

In this case, the door is connected to a counter weight via a wire stretched around a pulley, and the door normally descends by its own weight and closes the opening of the ice storage. When opening the opening, the door is pulled down and the weight is lowered. As a result, the door can be easily lifted, and the door is prevented from dropping suddenly (see, for example, Patent Document 1).
JP 2003-206667 A

  However, in such a structure in which the door and the weight are connected by the wire, there is a risk that the wire deteriorates due to use over time, and deformation or cutting occurs. In addition, since the wire expands and contracts, there is a problem in the followability of the weight with respect to the vertical movement of the door, and there is also a problem in that troublesome adjustment is forced in order to perform the operation smoothly.

  The present invention has been made to solve the conventional technical problems, and can smoothly open and close the door when opening and closing the opening of the storage chamber with the door that moves in the vertical direction. An opening / closing device is provided.

  The door opening and closing device of the present invention is provided on the front surface of a storehouse in which a storage chamber is configured so as to be movable in the vertical direction, and closes the front opening of the storage chamber so as to be openable and closable. Counter weight provided on the front surface of the storage room so as to be movable in the vertical direction, a rotation shaft provided on the front surface of the storage room below or above the opening of the storage room, and a central portion that is rotatable about the rotation axis. A first connecting arm provided on the first connecting arm, and a second connecting arm having a central portion pivotable about a pivot shaft and capable of pivoting across the first connecting arm; The door side engaging grooves provided on the left and right side portions of the one end of the door on the rotating shaft side with the opening of the storage chamber closed, and the weight side engaging grooves provided on the left and right side portions of the weight Provided, the left end of the first connecting arm can be rotated and moved to the left door side engaging groove Engage and engage the right end of the first connecting arm with the right weight-side engaging groove so as to rotate and move, and rotate the left end of the second connecting arm into the left-side weight-side engaging groove. The second connecting arm is engaged so as to be movable and movable, and the right end of the second connecting arm is engaged with the right door side engaging groove so as to be rotatable and movable.

  The door opening and closing device of the invention of claim 2 is provided with means for holding the door open by moving the door downward to open the opening of the storage chamber and making the weight heavier than the door. Features.

  According to a third aspect of the present invention, there is provided a door opening and closing device according to the first aspect, wherein the door moves downward to open the opening of the storage chamber, and means for holding the door closed by making the weight lighter than the door. It is characterized by that.

  According to a fourth aspect of the present invention, there is provided a door opening and closing device according to the first aspect, wherein the door moves upward to open the opening of the storage chamber, and the weight is made lighter than the door to keep the door open. It is characterized by that.

  According to a fifth aspect of the present invention, there is provided a door opening / closing device according to the first aspect, wherein the door moves upward to open the opening of the storage chamber, and the weight is made heavier than the door to keep the door closed. It is characterized by that.

  According to a sixth aspect of the present invention, there is provided a door opening / closing device according to the above-described invention, wherein one of the first and second connection arms includes an outer shaft ring rotatably attached to a rotation shaft, It consists of a front piece and a rear piece fixed to the front and rear surfaces of the shaft ring and extending in opposite directions from the outer shaft ring, and the other connecting arm pivots around the outer shaft ring The portions that are provided freely and are located on the left and right sides of the outer shaft ring are offset in the front-rear direction, and are located behind the front piece and in front of the rear piece.

  In the door opening and closing device of the present invention, a door that is provided on the front surface of the storage room in which the storage chamber is configured to be movable in the vertical direction, and that closes the front opening of the storage chamber so as to be openable and closable; Counter weight provided on the front surface of the storage room so as to be movable in the vertical direction, a rotation shaft provided on the front surface of the storage room below or above the opening of the storage room, and a central portion that is rotatable about the rotation axis. A first connecting arm provided on the first connecting arm, and a second connecting arm having a central portion pivotable about a pivot shaft and capable of pivoting across the first connecting arm; The door side engaging grooves provided on the left and right side portions of the one end of the door on the rotating shaft side with the opening of the storage chamber closed, and the weight side engaging grooves provided on the left and right side portions of the weight And the left end of the first connecting arm is rotated and moved to the left door side engaging groove. And the right end of the first connecting arm is pivotably engaged with the right weight side engaging groove, and the left end of the second connecting arm is used as the left weight side engaging groove. Since the right end of the second connecting arm is movably engaged with the right door-side engagement groove, the door is lowered from the state in which the opening of the storage chamber is closed. Alternatively, when the opening is opened by moving it upward, the connecting arms are rotated in the direction of overlapping with each other, whereby the weight is moved upward or downward. Further, when the door is moved upward or downward from the state where the opening of the storage chamber is opened and the opening is closed, both the connecting arms are rotated in the opposite direction, and thereby the weight is moved downward or upward.

  As a result, the door can be prevented from suddenly moving up and down, the door can be prevented from suddenly dropping, and the operability can be improved by reducing the force required to move the door upward. To be able to. In particular, in this case, since the door and the weight are not connected by a wire and a pulley as in the conventional case, the durability is improved, and the weight and the followability problem with respect to the movement of the door are eliminated, and the opening / closing operation is facilitated. Is.

  In this case, when the door is moved downward as in the invention of claim 2 to open the opening of the storage chamber, if the weight is made heavier than the door and a means for holding the door open is provided, the weight While the door is closed, the open state can be maintained. In this case, by reducing the weight difference between the door and the weight, the force required to open the opening by moving the door downward can be reduced and the weight can be easily opened. Can be closed automatically. Also in this case, a sudden rise of the door is prevented.

  On the contrary, if the weight is made lighter than the door and the closed state of the door is maintained as in the invention of claim 3, the door is kept in its own weight when opening the opening while maintaining the closed state of the door. It is possible to automatically open the opening of the storage chamber by moving it downward. In this case as well, by reducing the weight difference between the door and the weight, it is possible to prevent the door from dropping suddenly and reduce the force required to close the opening so that it can be easily closed. Become.

  Further, when the door is moved upward as in the invention of claim 4 to open the opening of the storage chamber, the weight is made lighter than the door and a means for holding the door open is provided. Thus, the open state can be maintained while maintaining the closed state of the door. In this case, by reducing the weight difference between the door and the weight, the force required to move the door upward to open the opening can be reduced and the opening can be easily made. Can be closed automatically. Also in this case, a sudden drop of the door is prevented.

  On the contrary, if the weight is made heavier than the door and the means for maintaining the closed state of the door is provided as in claim 5, the door is lifted by the weight when opening the opening while maintaining the closed state of the door. It is possible to automatically open the opening of the storage chamber. In this case as well, by reducing the weight difference between the door and the weight, it is possible to prevent the door from abruptly rising, and to reduce the force required to close the opening so that it can be easily closed. Become.

  In particular, as in the invention of claim 6, one of the first and second connecting arms is connected to the outer shaft ring rotatably attached to the rotating shaft, and the front and rear surfaces of the outer shaft ring. Each of which is constituted by a front piece and a rear piece which are respectively fixed and extend in opposite directions from the outer shaft ring, and the other connecting arm is rotatably provided around the outer shaft ring, and The parts located on the left and right sides of the outer shaft ring are displaced in the front-rear direction and are located behind the front piece and in front of the rear piece. The operation of the connecting arm can be made smooth and reliable.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a front view of an ice making machine 1 as an embodiment of a storage to which the present invention is applied, FIG. 2 is a side view of the ice making machine 1, FIG. 3 is a rear view of the ice making machine 1, and FIG. 4 is a plan view of the ice making machine 1. 5 is a front view of the door opening / closing device 2 of the present invention, FIG. 6 is a side view thereof, FIG. 7 is a front view of the door opening / closing device 2 with the frame 3 removed, FIG. 8 is a side view thereof, and FIG. Is a plan view of the door 6, the connecting device 7 and the weight 8 of the door opening and closing device 2, and FIG. 10 is an exploded view of FIG.

  The main body 11 of the ice making machine 1 is composed of a heat insulating box, and a so-called reverse cell type ice making device (not shown) is built in the uppermost part of the main body 11. A storage chamber 12 is formed in the main body 11 below the ice making device, and the storage chamber 12 is opened (shown by 13) at a position near the upper center of the front surface of the main body 11. In addition, a machine room 13 in which a cooling device (not shown) for cooling the ice making device is installed is formed in the lower part of the main body 11. Then, the ice automatically generated by the ice making device cooled by the cooling device falls from the ice making device and is stored in the storage chamber 12 below.

  The door opening / closing device 2 of the present invention closes the front opening 13 of the storage chamber 12 so as to be freely opened and closed. The door opening / closing device 2 surrounds the periphery of the front opening 13 of the storage chamber 12 and is attached to the front surface of the main body 11 so as to extend further downward. The door 6 and the counter weight 8 are inserted, and the connecting device 7 is connected to connect the door 6 and the weight 8. A cover 4 that covers the frame 3, the connecting device 7, the weight 8, and the door 6 that has been moved downward is attached to the periphery of the front opening 13 on the front side of the main body 11 and the lower side.

  The door 6 is composed of a transparent hard resin plate material having an area and a thickness dimension that can move in the vertical direction to open and close the front opening 13 of the storage chamber 12, and a handle 14 is formed on the upper edge thereof. A connecting metal fitting 16 is attached to and integrated with the lower end portion (the end portion of the door 6 on the side of the rotating shaft 28 described later). And the door side engaging grooves 17 and 18 are comprised by the predetermined length in the horizontal direction in the both right-and-left both ends of this metal fitting 16. As shown in FIG.

  The weight 8 is formed of a horizontally long stainless steel plate having a predetermined weight, and weight-side engaging grooves 21 and 22 are formed at a predetermined length in the horizontal direction at both left and right ends. The door 6 and the weight 8 are held in the frame 3 so as to be movable in the vertical direction so as to move horizontally in the vertical direction. In this case, in a state in which the door 6 closes the front opening 13 of the storage chamber 12, the door 6 is positioned at the uppermost part of the frame body 3, and the weight 8 is positioned at the front side of the door 6 and the outermost part of the frame body 3. Located at the bottom. In this embodiment, the weight W1 of the weight 8 is heavier than the weight of the door 6 (the weight including the handle 14 and the metal fitting 16) W2, and the difference is set to be small (W1> W2). .

  On the other hand, the connecting device 7 is a so-called pantograph type device, and includes a first and second connecting arms 26 and 27 made of stainless steel, a rotating shaft 28 and a mounting plate 31 made of stainless steel, and a polyacetal resin plate. It consists of washers 32-34, stainless steel bosses 36, collars 37, etc. In this case, the mounting plate 31 has a vertically long shape having a predetermined width, and the lower end thereof is fixed to the central portion of the lower side 3A of the frame body 3 and is then moved forward from the front side in a step-like manner and then raised. Is fixed to the central part of the intermediate side 3B of the frame 3 located at the lower edge of the front opening 13. Further, a stopper S made of a leaf spring material is attached to the lower part of the rear surface of the attachment plate 31.

  The rotating shaft 28 is fixed to a substantially central portion in the vertical direction on the rear surface (the main body 11 side) of the mounting plate 31. A circular through hole 26A is formed in the center of the first connecting arm 26, and the right part 26B is a front side and the left part 26C is a rear side from the through hole 26A. It is bent and deviated. An outer shaft ring 39, which will be described later, is rotatably fitted in the through hole 26A, and the outer shaft ring 39 is rotatably fitted around the rotation shaft 28.

  On the other hand, the second connecting arm 27 comprises the outer shaft ring 39, and a front piece 27A and a rear piece 27B each having a square hole H at one end, and is formed to project in the center of the front and rear surfaces of the outer shaft ring 39. With the square projections 39A and 39B engaged in the square hole H, the front side 27A is fixed to the front surface of the outer shaft ring 39 and the rear piece 27B is fixed to the rear surface of the outer shaft ring 39. The In this case, the front piece 27 </ b> A and the rear piece 27 </ b> B are attached so as to extend in the opposite directions from the outer shaft ring 39.

  In this case, the portion 26C of the first connecting arm 26 is located behind the front piece 27A of the second connecting arm 27, and the portion 26B is located ahead of the rear piece 27B. As a result, the first connecting arm 26 and the second connecting arm 27 can rotate independently about the rotation shaft 28, and both the connecting arms 26, 27 can rotate crossing each other. It becomes.

  The washers 32 and 33 are interposed between the front piece 27A and the first connection arm 26 of the second connection arm 27, and between the rear piece 27B and the first connection arm 26, and the washer 34 is provided between the front piece 27A. Between the two connecting arms 26 and 27 and the mounting plate 31. The boss 36 is attached to both ends of the first connecting arm 26 and both ends of the second connecting arm 27 (the front end portions of the front piece 27A and the rear piece 27B) via a collar 37. As a result, the door 6 and the weight 8 are connected by the connecting device 7.

  In the embodiment, the left boss 36 toward the first connecting arm 26 is engaged with the left door-side engagement groove 17 so as to be rotatable and movable toward the metal fitting 16, and the right boss 36 is moved toward the first connecting arm 26. It is engaged with the weight side engagement groove 22 on the right side so as to be rotatable and movable. Further, the left boss 36 (the boss 36 at the front end of the front piece 27A) toward the second connecting arm 27 is engaged with the left weight side engaging groove 21 so as to be rotatable and movable, and toward the second connecting arm 27. The right boss 36 (the boss 36 at the tip of the rear piece 27B) is engaged with the right door side engaging groove 18 so as to be rotatable and movable.

  Next, the operation of the door opening and closing apparatus 2 according to the present invention will be described with reference to FIGS. 5 to 8 and FIGS. 11 to 16. 5 to 8 show a state in which the door 6 closes the front opening 13 of the storage chamber 12. In this state, the door 6 is located in front of the front opening 13 of the storage chamber 12 and is located at the uppermost part of the frame 3, and the weight 8 is located at the lowermost part of the frame 3. Further, the first connecting arm 26 of the connecting device 7 extends from the upper left to the lower right, and the second connecting arm 27 extends from the upper right to the lower left (the rear piece 27B is Upper right, front piece 27A is lower left). Each boss 36 is located at the innermost position of each engagement groove 17, 18, 21, 22.

  In this case, as described above, the weight W1 of the weight 8 is set to be slightly smaller than the weight W2 of the door 6, so that the door 6 is maintained in a state in which the front opening 13 is closed by the weight of the weight 8. When taking out the ice from the storage chamber 12, the door 6 is pulled down with the handle 14 from this state and moved downward. Then, the first connecting arm 26 rotates counterclockwise in FIG. 7 and the second connecting arm 27 rotates clockwise in FIG. 7, that is, in the direction of overlapping with each other, and each boss 36. -Moves outward in each of the engagement grooves 17, 18, 21, and 22.

  11 and 12, when the front opening 13 is just half-opened by the door 6, both the connecting arms 26, 27 are superposed in the horizontal direction, and each boss 36. Move to the outermost position of 18, 21, and 22. At this time, the portion 26B of the first connecting arm 26 matches the front of the rear piece 27B of the second connecting arm 27, and the portion 26C of the first connecting arm 26 is the front piece 27A of the second connecting arm 27. Matches behind.

  Then, the door 6 is further pulled down, and when the handle 14 descends the front opening 13 to the lower edge (the front side of the central side 3B) as shown in FIGS. 13 to 16, the opening 13 is fully opened. In this state, the door 6 is lowered to the main body 11 side behind the cover 4, and the weight 8 is raised to the front side of the door 6 immediately below the handle 14. Further, the metal fitting 16 of the door 6 is located behind the stopper S, and the stopper S is in pressure contact with the metal fitting 16. As described above, since the weight W1 of the weight 8 is heavier than the weight W2 of the door 6, if the hand is spoken as it is, the door 6 will automatically rise and close due to the weight of the weight 8, but the stopper S is attached to the bracket. The open state of the door 6 is maintained by being in pressure contact with 16.

  Then, when the removal of the ice from the storage chamber 12 is completed, the door 6 is lifted slightly with the handle 14. Then, since the metal fitting 16 moves upward from the stopper S, the holding state is released, and thereafter the door 6 automatically rises due to the weight of the weight 8 even if the hand is released. Finally, the door 6 closes the front opening 13 of the storage chamber 12 as shown in FIGS.

  With such a configuration, the door 6 can be prevented from suddenly moving up and down, and the open state is also held by the stopper S while the closed state of the door 6 is maintained by the weight 8. be able to. Further, since the weight difference between the door 6 and the weight 8 is made small, the force required for moving the door 6 downward to open the front opening 13 of the storage chamber 12 can be reduced and easily opened. At the same time, when the front opening 13 is closed, it can be automatically closed by the weight 8, so that the operability is improved and the door 6 is prevented from rising rapidly.

  In particular, since the door 6 and the weight 8 are not connected by a wire and a pulley as in the prior art, the durability is improved, and if the door 6 moves, the weight 8 will follow in conjunction. As a result, the conventional follow-up problem does not occur, and the opening / closing operation is smoothed.

  Further, the second connecting arm 27 is fixed to the outer shaft ring 39 rotatably attached to the rotating shaft 28 and the front and rear surfaces of the outer shaft ring 39, and is opposite to each other from the outer shaft ring 39. The front side piece 27 </ b> A and the rear side piece 27 </ b> B extend in the direction, and the first connection arm 26 is rotatably provided around the outer shaft ring 39, and on the left and right sides of the outer shaft ring 39. Since the positions of the parts are displaced in the front-rear direction, the part 26C is located behind the front piece 27A, and the part 26B is located in front of the rear piece 27B. Nevertheless, the operation of the connecting arms 26 and 27 accompanying the opening and closing of the door 6 becomes smooth and reliable.

  Here, in the embodiment, the weight W1 of the weight 8 is made smaller than the weight W2 of the door 6, but not limited thereto, the weight W1 of the weight 8 is made lighter than the weight W2 of the door 6 (W1 <W2). Also good. In that case, it is necessary to provide a stopper for holding the door 6 in a state where the front opening 13 is closed. And if it is set as such a structure, when opening the front surface opening 13, maintaining the closed state of the door 6, the door 6 is moved below with dead weight, and the front surface opening 13 of the store room 12 is made to open automatically. It becomes possible. Also in this case, by reducing the weight difference between the door 6 and the weight 8, it is possible to prevent the door 6 from dropping suddenly, and the force required to close the front opening 13 is reduced and the door 6 is easily closed. Will be able to.

  In the embodiment, the door 6 is lowered and the front opening 13 is opened, but the front opening 13 may be opened by moving (raising) the door 6 upward. In that case, the weight 8 is positioned above the door 6 in the closed state, and the connecting device 7 including the rotating shaft 28, the connecting arms 26 and 27, the mounting plate 31 and the like is also on the front surface of the main body 11 above the front opening 13. Will be provided.

  And if the weight W1 of the weight 8 is made lighter than the weight W2 of the door 6 and a stopper for maintaining the opened state of the door 6 is provided in such a structure, the stopper 6 keeps the door 6 closed by its own weight. An open state can also be maintained. Also in this case, by reducing the weight difference between the door 6 and the weight 8, the force required to move the door 6 upward to open the front opening 13 can be reduced and easily opened. When the opening 13 is closed, it can be automatically closed by its own weight, and a sudden drop of the door 6 is prevented.

  On the contrary, if the weight W1 of the weight 8 is made heavier than the weight W2 of the door 6 and a stopper is provided to keep the door 6 closed, when the front opening 13 is opened while the door 6 is kept closed. Can move the door 6 upward by the weight 8 to automatically open the front opening 13 of the storage chamber 12. Also in this case, by reducing the weight difference between the door 6 and the weight 8, it is possible to prevent the door 6 from rapidly rising, and the force required to close the front opening 13 is reduced and the door 6 is easily closed. Will be able to.

  In the embodiment described with reference to the drawings, the second connecting arm 27 is composed of the three parts of the outer shaft ring 39, the front piece 27A, and the rear piece 27B. The second connecting arm 27 may be configured as a single component. Further, in the embodiment, the weight 8 comes to the front side of the door 6, but conversely, a structure in which the weight 8 comes to the rear side (the main body 11 side) of the door 6 is also possible.

  Furthermore, in the embodiments, the ice making machine has been described as an example. However, the present invention is not limited thereto, and the present invention is also effective for a door opening / closing device that opens and closes a front opening of a refrigerator or the like.

It is a front view of the ice making machine as an example of a storage to which the present invention is applied. It is a side view of the ice making machine of FIG. It is a rear view of the ice making machine of FIG. It is a top view of the ice making machine of FIG. It is a front view of the door opening and closing device of the present invention in the state where the door is closed. It is a side view of the door opening / closing apparatus of FIG. FIG. 6 is a front view of the door opening and closing device of FIG. 5 in a state in which the frame is removed. It is a side view of the door opening / closing apparatus of FIG. It is a top view of a door of a door opening and closing device of the present invention, a connection device, and a weight. FIG. 10 is an exploded view of FIG. 9. It is a front view of the door opening and closing device of the present invention in the state which opened the door halfway. It is a side view of the door opening / closing apparatus of FIG. It is a front view of the door opening and closing device of the present invention in the state where the door is opened. It is a side view of the door opening / closing apparatus of FIG. It is a front view of the door opening / closing apparatus of FIG. 13 in the state where the frame is removed. It is a side view of the door opening / closing apparatus of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ice machine 2 Door opening / closing device 3 Frame body 4 Cover 6 Door 7 Connecting device 8 Weight 11 Main body 12 Storage chamber 13 Front opening 14 Handle 16, 17 Door side engaging groove 21, 22 Weight side engaging groove 26 1st connection Arm 27 Second connecting arm 27A Front piece 27B Rear piece 28 Rotating shaft 31 Mounting plate 36 Boss 39 Outer shaft ring S Stopper

Claims (6)

A door that is provided on the front surface of the storage room in which the storage chamber is configured to be movable in the vertical direction, and that opens and closes the front opening of the storage chamber; and
A counter weight provided on the front surface of the storage on the front side or rear side of the door so as to be movable in the vertical direction;
A rotating shaft provided in front of the storage below or above the opening of the storage chamber;
A first connection arm having a central portion pivotable about the pivot shaft;
A second connection arm having a central portion pivotable about the pivot axis and capable of pivoting across the first coupling arm;
Door-side engagement grooves provided on the left and right sides of one end of the door which is on the rotating shaft side with the opening of the storage chamber closed;
A weight side engaging groove provided on both left and right sides of the weight,
The left end portion of the first connecting arm is pivotably engaged with the left door side engaging groove, and the right end of the first connecting arm is pivoted to the right weight side engaging groove. Engage movably and
The left end of the second connecting arm is pivotably engaged with the left weight-side engaging groove, and the right end of the second connecting arm is rotated with the right door-side engaging groove. A door opening and closing device characterized by being movably engaged.   2. The door according to claim 1, wherein the door moves downward to open the opening of the storage chamber, and means for holding the door open by making the weight heavier than the door. Switchgear.   2. The door according to claim 1, further comprising means for holding the closed state of the door by moving the door downward to open the opening of the storage chamber and making the weight lighter than the door. Switchgear.   2. The door according to claim 1, wherein said door moves upward to open the opening of said storage chamber, and means for holding said door open by making said weight lighter than said door is provided. Switchgear.   2. The door according to claim 1, further comprising means for holding the closed state of the door by moving the door upward to open the opening of the storage chamber and making the weight heavier than the door. Switchgear. One connection arm of the first and second connection arms is fixed to the outer shaft ring rotatably attached to the rotation shaft and the front and rear surfaces of the outer shaft ring. Consists of a front piece and a rear piece extending in opposite directions from the ring,
The other connecting arm is rotatably provided around the outer shaft ring, and the left and right portions of the outer shaft ring are deviated from each other in the front-rear direction. 6. The door opening and closing device according to claim 1, wherein the door opening and closing device is located in front of the side piece.

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