JP2004278251A - Double wing door opening device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a double wing door opening device having a simple structure with the reduced number of components, and improving the heat insulation performance of the door. <P>SOLUTION: Door bearings 12a and 12b with grooves 13a and 13b with which hinge shafts of a thermo-hygrostat are removably engaged are provided at the left and right ends of top and bottom surfaces of a door 10. A lock member 14a with a claw 15a to lock a hinge shaft 6a from release from the groove 13a is assembled in the door bearing 12a. The upper and lower lock members 14a are connected by a lock shaft 6a. A lock handle 11a is connected with the lock shaft 16a via a spring 17a. When the lock handle 11a is pulled toward you, the lock handle 11a rotates the upper and lower claws 15a from the lock position to the open position via the spring 17a and lock shaft 16a. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a double-door type door opening and closing device that can open and close a door attached to a refrigerator, a thermostat, and the like from any side.
[0002]
[Prior art]
As a door attached to a refrigerator or the like, a one-sided door has been generally provided on the market, but in recent years, a door which can be opened on both sides has been provided on the market. As a double-opening door opening / closing device, for example, the following structure described in Patent Literature 1 has been proposed.
[0003]
Hinspins are protruded through hinge plates provided at left and right ends of the apparatus main body to which the door is attached, and the door has an engagement groove in which the hinge pins can be detachably engaged from the open side of the door. A plate is provided. A latch plate that is removably engaged with the hinge pin by a latch waterfall that opens on the outer diameter side and that restrains the hinge pin in the engagement premises is rotatably attached to both left and right portions of the fixed plate. These latch plates are biased by springs. A connecting member is provided between the two latch plates to prevent the rotation of the other latch plate in conjunction with the rotation of one latch plate in the release direction.
[0004]
[Patent Document 1]
JP-A-7-151452
[0005]
[Problems to be solved by the invention]
However, such a double-opening door opening and closing device has a problem that a plurality of members such as a hinge plate and a fixed plate are required, and the structure is complicated. In addition, since it is necessary to provide a plurality of members, that is, a door opening / closing device, inside the door, there is a problem that the heat insulation of the door is deteriorated by limiting the amount of the heat insulating material filled in the door. .
[0006]
Therefore, a main object of the present invention is to provide a double-door type door opening / closing device capable of simplifying the structure with a small number of components and improving the heat insulation of the door.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a double door opening and closing apparatus according to claim 1 is a double door opening and closing apparatus for opening and closing a door attached to a main body from an arbitrary side. Or, a shaft protruding at both upper and lower ends, a bearing member provided on the door, and having a groove in which the shaft engages and disengages from the open side of the door, and incorporated into the bearing member, A claw for locking the shaft that comes out is rotatable with respect to the groove, and a lock member disposed so that the rotation shaft substantially coincides with the shaft, and a shaft connected to the lock member are turned. A handle that is attached to a side surface of the door so as to be moved, and is operated when the door is opened.
[0008]
According to the first aspect, the double-opening type opening / closing device includes a shaft protruding from both left and right or upper and lower ends of the main body, a bearing member provided on the door, and having a groove in which the shaft is detachably engaged. A lock member that is rotatable with respect to the groove and locks a shaft that comes out of the groove, and a handle that is operated when the lock member is rotated to open the door. This eliminates the need for a plurality of members such as a hinge plate and a fixed plate, so that the number of parts of the double-door opening and closing device can be reduced and the structure can be simplified. In addition, since there is no need to provide a plurality of members inside the door, the limitation on the amount of heat insulating material to be filled in the door is relaxed, so that the heat insulation of the door can be improved.
[0009]
In the double door type door opening and closing device according to the second aspect, the pair of left and right or upper and lower grooves are disposed so as to widen toward the opening side of the door and engage with one of the grooves. When the shaft is released, the shaft engaging with the other groove is pushed into the depth of the groove.
[0010]
According to the second aspect, the pair of left and right or upper and lower grooves are disposed so as to expand toward the open side of the door, and engage with the other groove when the shaft that engages with one groove is opened. Since the mating shaft is pushed deep into the groove, both shafts do not come out of both the left and right or upper and lower grooves at the same time. That is, it is possible to prevent the door from falling from the main body.
[0011]
According to a third aspect of the present invention, there is provided a double door opening and closing apparatus according to the first aspect, wherein a link for connecting the pair of left and right or upper and lower lock members is provided. The claw of the lock member is adapted to advance into the groove.
[0012]
According to the third aspect, a link for connecting the pair of left and right or upper and lower lock members is provided, and when the claw of one lock member retreats from the groove, the claw of the other lock member advances into the groove. Thus, both shafts do not come out of both the left and right or upper and lower grooves simultaneously. That is, it is possible to prevent the door from falling from the main body.
[0013]
The double door opening and closing device according to claim 4 is a double door opening and closing device that opens and closes a door attached to the main body from an arbitrary side, and protrudes from left and right or upper and lower ends of the main body to which the door is attached. A shaft provided, a guide provided on a substantially half circumference around the shaft, a bearing member provided on the door, and having a groove for engaging and disengaging the shaft from the open side of the door; And a pair of left and right or upper and lower grooves are disposed so as to expand toward the open side of the door, and the guide and the cam are provided when the door is closed. Are arranged so as to face each other, and when the door is opened, the cam is formed so as to enter the inner periphery of the guide.When the door is opened, the cam on the axis side is guided by the guide, and The cam is provided with a convex portion for pushing a shaft deep into the groove. .
[0014]
According to the fourth aspect, the double-opening type opening / closing device is provided with a shaft protruding from both left and right or upper and lower ends of the main body, a guide provided on substantially a half circumference around the shaft, and a door provided with the shaft. By providing a bearing member having a groove that freely engages and a cam provided around the depth of the groove, a plurality of members such as a hinge plate and a fixing plate are not required. The number of parts of the switchgear can be reduced and the structure can be simplified. In addition, since there is no need to provide a plurality of members inside the door, the limitation on the amount of heat insulating material to be filled in the door is relaxed, so that the heat insulation of the door can be improved. Further, since the groove is arranged so as to expand toward the opening side of the door, both shafts do not come off simultaneously from both the left and right or upper and lower grooves. That is, it is possible to prevent the door from falling from the main body. Further, the guide and the cam are arranged so as to face each other with the door closed, and at the beginning of opening of the door, the cam on the shaft side is guided by the guide. When the door opens, the cam enters the inner periphery of the guide.
Therefore, during the operation of opening the door, the door does not rattle or come off the main body.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
[0016]
First, a double door type door opening and closing device according to a first embodiment of the present invention will be described with reference to FIGS. In the present embodiment, a description will be given of a case where the double-door type door opening / closing device is attached to a thermo-hygrostat and opens and closes the door from the left and right sides. FIG. 1 is a partial perspective view showing a thermo-hygrostat to which the double-door opening / closing device of the present embodiment is attached. FIG. 2 is a perspective view showing a door of the thermo-hygrostat shown in FIG. 1 and is a view for explaining a structure of a double-door opening and closing device. FIG. 3 is a top view of the door shown in FIG. 2 and is a diagram illustrating a double-door opening / closing device when the door is closed. FIG. 4 is a top view of the door shown in FIG. 2 and is a diagram illustrating a double-door opening / closing device when the door is open. FIG. 5 is a schematic diagram illustrating another example of the shape of the double-door type door opening and closing device of the present embodiment. In addition, the code | symbol of a and b described in the figure shall be that a is located on the right side with respect to the opening of a thermo-hygrostat, and that b is on the left side with respect to the opening of a thermo-hygrostat. And
[0017]
As shown in FIG. 1, the door opening / closing device 1 is for opening / closing a door 10 attached to a thermo-hygrostat 3. The thermo-hygrostat 3 is provided with a protrusion 5 for covering the upper and lower surfaces of the door 10. Hinge shafts 6a and 6b are provided at both ends of the protruding portion 5 so as to protrude downward if the protruding portion 5 is on the upper surface, and are protruded upward if the protruding portion 5 is on the lower surface. Hinge shafts 6a and 6b are provided. The door opening and closing device 1 can open and close the door 10 from the left side with respect to the opening 4 of the thermo-hygrostat 3 about the hinge shaft 6a located on the right side as the center of movement, and the hinge axis located on the left side. The door 10 can be opened and closed from the right side around the rotation center 6b. The door 10 is formed of a box having a size that covers the opening 4. On both side surfaces of the door 10, lock handles 11a and 11b (see FIG. 2) described later are provided. In addition, a seal member (not shown) is attached around a plane facing the opening 4 of the door 10, and the inside of the door 10 is filled with a heat insulating material (not shown).
[0018]
As shown in FIG. 2, grooves 13 a, 13 b with which the hinge shafts 6 a, 6 b of the thermo-hygrostat 3 are detachably engaged from the open side of the door 10 are provided at both left and right ends of the upper surface and the lower surface of the door 10. Door bearings 12a and 12b are provided. The grooves 13a and 13b are formed to have a shape that widens toward the open side of the door 10, and more specifically, the cross section is formed in a boomerang shape. Lock members 14a and 14b are incorporated in the door bearings 12a and 12b, respectively. The lock members 14a and 14b have pawls 15a and 15b for locking the hinge shafts 6a and 6b coming out of the grooves 13a and 13b so as to be rotatable with respect to the grooves 13a and 13b. The shafts 6a and 6b are disposed so as to substantially coincide with each other. As a result, as shown in FIG. 3, the pawls 15a and 15b are positioned at positions where the pawls 15a and 15b advance into the grooves 13a and 13b to lock the hinge shafts 6a and 6b, and between the grooves 13a and 13b. When the claws 15a, 15b are retracted, the hinges 6a, 6b can be pivoted at the position where the hinge shafts 6a, 6b are opened.
[0019]
The upper and lower locking members 14a and 14b are connected to the opening 4 by lock shafts 16a and 16b disposed to penetrate the door 10 on the right and left sides, respectively, so that the upper and lower locking members are locked. The members 14a and 14b, that is, the claws 15a and 15b rotate in the same direction in conjunction with each other. The left and right lock shafts 16a, 16b are urged by springs 17a, 17b, respectively, so that the claws 15a, 15b are always at positions where the hinge shafts 6a, 6b are always locked. , And are connected to the lock shafts 16a, 16b via springs 17a, 17b, respectively. The lock handles 11a and 11b are operated when the door 10 is opened. For example, when the lock handle 11a located on the right side with respect to the opening 4 is pulled forward, the lock handle 11a is released from the position where the upper and lower claws 15a lock the hinge shaft 6a via the spring 17a and the lock shaft 16a. The claw 15a is rotated to the position.
[0020]
As shown in FIG. 3, in the door opening / closing device 1 configured as described above, when the door 10 is closed, the hinge shafts 6a, 6b are positioned at substantially the curved portions of the grooves 13a, 13b. Is engaged. The hinge shafts 6a, 6b are locked so as not to fall out of the grooves 13a, 13b by the claws 15a, 15b advanced into the left and right grooves 13a, 13b.
[0021]
Then, in the door opening and closing device 1, when the lock handle 11b is pulled toward the user, the lock handle 11b is moved to a position where the upper and lower claws 15b are released from a position where the hinge shaft 6b is locked via the spring 17b and the lock shaft 16b. 15b is rotated. Then, since the upper and lower claws 15b are retracted from the inside of the groove 13b, the hinge shaft 6b can come out of the groove 13b. Further, when the lock handle 11b is pulled forward, as shown in FIG. 4, the hinge shaft 6a slides to the back of the groove 13a and is caught by the groove 13a, so that the hinge shaft 6a is pivoted about the hinge shaft 6a. 6b comes out of the groove 13b. Then, the door 10 rotates counterclockwise on the paper surface of FIG. 4 around the hinge shaft 6a. Thus, the door opening and closing device 1 opens the door 10.
[0022]
When closing the door 10 that has been opened as described above, the door 10 may be pushed in the closing direction. Since the lock shaft 16b is urged by the spring 17b, the claw 15b returns to the position for locking the hinge shaft 6b. However, with the closing movement of the door 10, the hinge shaft 6b moves to the inclined surface of the claw 15b. Contact. Then, the force acting on the inclined surface of the claw 15b rotates the claw 15b to a position where the hinge shaft 6b is opened. Thereafter, the hinge shaft 6b engages at the same position as when the door 10 shown in FIG. 3 is closed, that is, at the position of the substantially curved portion of the groove 13b, and the hook 15b is hinged by the bias of the spring 17b. It returns to the position for locking the shaft 6b again. Thus, the door opening / closing device 1 closes the door 10.
[0023]
In the door opening / closing device 1 configured as described above, when the door 10 is opened clockwise on the paper surface of FIG. 4 around the hinge shaft 6b as a rotation center, the operation is reverse to the above. The operation is basically the same as the above, and the description is omitted here.
[0024]
Further, in the door opening and closing apparatus 1 according to the present embodiment, if both of the lock handles 11a and 11b are erroneously pulled to the front side simultaneously with the same force, the positions where both the claws 15a and 15b open the hinge shafts 6a and 6b are opened. However, since the hinge shafts 6a and 6b interfere with the curved portions of the grooves 13a and 13b, the door 10 does not come off from the thermo-hygrostat 3.
Also, at this time, even if the balance between the pulling forces of the lock handles 11a and 11b is lost, only one of the hinge shafts 6a and 6b on the side with the strong pulling force of the lock handle comes out of the grooves 13a and 13b. Does not come off from the thermo-hygrostat 3.
[0025]
Further, in the door opening and closing device 1 according to the present embodiment, by simultaneously pulling the lock handles 11a and 11b, both the claws 15a and 15b can be present at the positions where the hinge shafts 6a and 6b are opened. A mechanism may be used in which both the claws 15a and 15b cannot be present at the positions where the hinge shafts 6a and 6b are opened. As this mechanism, for example, as shown in FIG. 5, mounting shafts 18a and 18b are provided on the left and right locking members 14a and 14b, respectively, and a link shaft 19 for connecting the mounting shafts 18a and 18b is provided. By doing so, the left and right lock members 14a, 14b, that is, the claws 15a, 15b rotate in the same direction in conjunction with each other. Therefore, the claw 15b is located at a position where the hinge shaft 6b is opened by retracting from the groove 13b, and the claw 15a is located at a position where the hinge shaft 6a is locked by further entering the groove 13a. Will remain.
[0026]
As described above, according to the present embodiment, the door opening and closing device 1 includes the hinge shafts 6a and 6b protruding from the constant temperature and humidity chamber 3 and the grooves 13a and Door bearings 12a, 12b having a lock 13b, and claws 15a, 15b incorporated in the door bearings 12a, 12b for locking hinge shafts 6a, 6b coming out of the grooves 13a, 13b can be freely rotated with respect to the grooves 13a, 13b. And lock handles 11a and 11b connected via lock springs (not shown) to lock shafts 16a and 16b for rotating the lock members 14a and 14b in conjunction with each other. Therefore, a plurality of members such as a hinge plate and a fixed plate are not required, and the number of parts of the door opening and closing device 1 is reduced, and the structure can be simplified. In addition, since it is not necessary to provide a plurality of members inside the door 10, the restriction on the amount of the heat insulating material to be filled in the door 10 is relaxed, so that the heat insulation of the door 10 can be improved.
[0027]
Further, according to the present embodiment, since the grooves 13a and 13b are formed so as to expand toward the open side of the door 10, both the lock handles 11a and 11b are erroneously brought forward by the same force at the same time. Even if it is pulled to the side, the hinge shafts 6a, 6b interfere with the curved portions of the grooves 13a, 13b. When the hinge shaft 6b engaging with one groove 13b comes off, the hinge shaft 6a engaging with the other groove 13a slides to the back of the groove 13a, so that both the left and right grooves 13a, Both hinge shafts 6a and 6b do not come out of 13b at the same time. That is, it is possible to prevent the door 10 from dropping from the thermo-hygrostat 3 without the door 10 coming off the thermo-hygrostat 3.
[0028]
Further, according to the present embodiment, the link shaft 19 that connects the left and right lock members 14a and 14b is provided, and the claw 15b is located at the position where the hinge shaft 6b is opened by retracting from the groove 13b. At the same time, the claw 15a further extends into the groove 13a, so that the claw 15a remains at the position where the hinge shaft 6a is locked.
Therefore, both hinge shafts 6a and 6b do not come out of both right and left grooves 13a and 13b at the same time. That is, it is possible to prevent the door 10 from dropping from the thermo-hygrostat 3 without the door 10 coming off from the thermo-hygrostat 3.
[0029]
Next, a double door type door opening and closing apparatus according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 6 is a perspective view showing the door of the thermo-hygrostat 3, and is a view for explaining the structure of the double-door opening and closing device. FIG. 7 is a cross-sectional view illustrating the double-door opening / closing device when the door is closed. FIG. 8 is a cross-sectional view illustrating the double-door opening / closing device when the door is opened by 7 °. FIG. 9 is a cross-sectional view illustrating a double-door opening and closing device when the door is opened. FIG. 10 is an operation diagram showing a part of the double-door opening and closing device, and is a diagram for explaining a change from the state of FIG. 8 to the state of FIG. FIG. 11 is a schematic diagram illustrating a case where a door opening / closing guide and a guide receiving claw are provided in a double door opening / closing device. FIG. 12 is a sectional view when both handles are pulled. In addition, the code | symbol of a and b described in the figure shall be that a is located on the right side with respect to the opening of a thermo-hygrostat, and that b is on the left side with respect to the opening of a thermo-hygrostat. And 7A to 9, FIG. 7A is a cross-sectional view taken along the line aa in FIG. 6, and FIG. 7B is a cross-sectional view taken along the line bb in FIG. 6.
[0030]
As shown in FIG. 6, a door opening / closing device 2 according to the present embodiment will be described as being attached to the constant temperature and humidity chamber 3 described in the first embodiment of the present invention. Each part 4 to 6 of the thermo-hygrostat 3 is configured in the same manner as in the first embodiment of the present invention, and the guides 7a and 7b around the shafts are substantially arranged on the main body side around the hinge shafts 6a and 6b. It is provided half a circumference. The door opening and closing device 2 is for opening and closing the door 20 attached to the thermo-hygrostat 3 similarly to the door opening and closing device 1, and is located on the right side with respect to the opening 4 of the thermo-hygrostat 3. The door 20 can be opened and closed from the left side with the hinge shaft 6a as the center of rotation, and the door 20 can be opened and closed from the right side with the hinge shaft 6b located on the left side as the center of rotation. The door 20 is formed of a box having a size to cover the opening 4, similarly to the door 10. In addition, a seal member (not shown) is provided around a plane of the door 20 facing the opening 4. Is attached, and the inside of the door 20 is filled with a heat insulating material (not shown). Further, handles (not shown) are provided on both side surfaces of the door 20, and the door 20 can be opened by pulling the handle toward the user. Further, door bearings 21a and 21b are provided at both left and right ends of the upper surface and the lower surface of the door 20, respectively.
[0031]
The door bearings 21a and 21b are formed around grooves 22a and 22b with which the hinge shafts 6a and 6b of the thermo-hygrostat 3 are detachably engaged from the open side of the door 20, and around the inner side of the grooves 22a and 22b. It has projecting bearing cams 23a and 23b. The grooves 22a and 22b are formed so as to widen toward the open side of the door 20, and more specifically, the cross section is formed in a boomerang shape. Also, as shown in FIG. 7B, when the door 20 is closed, the bearing cams 23a and 23b are located at positions facing the guides 7a and 7b around the shaft, and the door 20 is opened. In this case, the shaft guide 7a or 7b enters between the hinge shaft 6a or 6b. The bearing cams 23a and 23b are provided with protrusions 24a and 24b for pushing the hinge shafts 6a and 6b into the depths of the grooves 22a and 22b when the door 20 is opened.
[0032]
In the door opening / closing device 2 configured as described above, when the door 20 is closed, as shown in FIG. 7A, the hinge shafts 6a and 6b are positioned at substantially the curved portions of the grooves 22a and 22b. 22a and 22b. As shown in FIG. 7B, the guides 7a and 7b around the shaft and the bearing cams 23a and 23b are arranged to face each other.
[0033]
Then, in the door opening and closing device 2, when the right handle (not shown) with respect to the opening 4 is pulled toward the user, the right side of the door 20 rotates clockwise on the paper surface of FIG. Then, when the door 20 rotates, as shown in FIG. 8, the convex portion 24b of the bearing cam 23b collides with the guide 7b around the axis. Further, when the right handle is pulled toward the user, the door 20 moves rightward on the paper surface of FIG. 8 due to the collision between the projection 24b and the guide 7b around the axis.
[0034]
At this time, since the door 20 moves to the right relative to the thermo-hygrostat 3, the hinge shaft 6b slides to the back of the groove 22b and the bearing cam 23b moves as shown in FIG. Is guided between the axis guide 7b and the hinge shaft 6b. Further, the hinge shaft 6a slides to the open side of the groove 22a.
[0035]
Further, when the right handle is pulled toward the user, the hinge shaft 6b is hooked in the groove 22b and the hinge shaft 6a comes out of the groove 22a as shown in FIG. 9A. As shown in FIG. 9B, the bearing cam 23b rotates clockwise on the paper surface of FIG. 9 around the hinge shaft 6b between the shaft guide 7b and the hinge shaft 6b. . That is, the door 20 rotates clockwise on the paper surface of FIG. 9 around the hinge shaft 6b. At this time, since the bearing cam 23b is engaged with the gap between the shaft guide 7b and the hinge shaft 6b, the door 20 does not rattle and does not come off from the thermo-hygrostat 3. . Thus, the door opening / closing device 2 opens the door 20.
[0036]
When closing the door 20 that has been opened as described above, the door 20 may be pushed in the closing direction. In this way, the door 20 rotates counterclockwise on the hinge shaft 6b on the paper surface of FIG. It rotates around and returns to the same state as when the door 20 shown in FIG. 7 is closed. Thus, the door opening / closing device 2 closes the door 20. In the door opening / closing device 2 configured as described above, when the door 20 is opened counterclockwise on the paper surface of FIG. 7 around the hinge shaft 6a, the operation is reverse to the above. However, its operation is basically the same as that described above, and the description is omitted here.
[0037]
In addition, as shown in FIG. 11, the constant temperature and humidity chamber 3 may be provided with guide receiving claws 8a and 8b, and the door 20 may be provided with door opening and closing guides 25a and 25b. When the door 20 is closed, the door opening / closing guides 25a and 25b collide with the guide receiving claws 8a and 8b and are guided by the guide receiving claws 8a and 8b, so that the door 20 can be easily returned to the original position. it can.
[0038]
In the door opening and closing apparatus 2 according to the present embodiment, if both of the handles provided on both side surfaces of the thermo-hygrostat 3 are simultaneously pulled toward the front side by the same force, as shown in FIG. Since the shafts 6a and 6b interfere with the curved portions of the grooves 22a and 22b, the door 20 does not come off from the thermo-hygrostat 3. Also, at this time, even if the balance between the pulling forces of the two handles is lost, only one of the hinge shafts 6a and 6b on the side with the strong pulling force comes out of the grooves 22a and 22b. It does not come off from the container 3.
[0039]
As described above, according to the present embodiment, the door opening / closing device 2 is provided on the hinge shafts 6a and 6b protruding from the thermo-hygrostat 3, and substantially halfway around the main body around the hinge shafts 6a and 6b. Door guide portions 21a, 21b provided on the door 20 and having grooves 22a, 22b which are provided on the door 20 and in which the hinge shafts 6a, 6b are removably engaged, and the inner portions of the grooves 22a, 22b. And bearing cams 23a and 23b protruding around the periphery. This eliminates the need for a plurality of members such as a hinge plate and a fixed plate, so that the number of components of the door opening and closing device 2 can be reduced and the structure can be simplified. In addition, since it is not necessary to provide a plurality of members inside the door 20, the restriction on the amount of the heat insulating material filled in the door 20 is relaxed, so that the heat insulating property of the door 20 can be improved.
[0040]
In addition, according to the present embodiment, since the grooves 22a and 22b are formed so as to expand toward the open side of the door 20, the handles provided on both sides of the thermo-hygrostat 3 by mistake. Even if both are simultaneously pulled to the near side by the same force, the hinge shafts 6a and 6b interfere with the curved portions of the grooves 22a and 22b. Also, at this time, even if the balance between the pulling forces of the two handles is lost, only one of the hinge shafts 6a, 6b on the side with the strong pulling force of the handle comes out of the grooves 22a, 22b. Therefore, both hinge shafts 6a and 6b do not come out of both grooves 22a and 22b at the same time. That is, it is possible to prevent the door 20 from dropping from the thermo-hygrostat 3.
[0041]
According to the present embodiment, the guides 7a and 7b around the shaft and the bearing cams 23a and 23b are disposed so as to face each other when the door 20 is closed. When the door 20 rotates 7 °, a collision between the convex portion 24b of the bearing cam 23b on the shaft side and the guide around the shaft 7b causes the bearing cam 23b to enter the gap between the guide around the shaft 7b and the hinge shaft 6b. Then, when the door 20 is opened, the bearing cam 23b rotates about the hinge shaft 6b about the hinge 7b and the hinge shaft 6b. Therefore, the door 20 does not rattle or come off the thermo-hygrostat 3 during the opening operation of the door 20.
[0042]
The preferred embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and various design changes can be made within the scope of the appended claims. For example, in the above-described embodiment, the door opening and closing devices 1 and 2 are hinged shafts 6a and 6b projecting downward at both ends of the protrusion 5 of the thermo-hygrostat 3 if the protrusion 5 is on the upper surface. And hinged shafts 6a and 6b projecting upward are provided in the case of the projecting portion 5 on the lower surface. The door opening / closing devices 1 and 2 can open and close the door 10 from the left side with respect to the opening 4 of the thermo-hygrostat 3 about the hinge shaft 6a located on the right side, and are located on the left side. The door 10 can be opened and closed from the right side with the hinge shaft 6b as the center of rotation. However, the door opening and closing device can open and close the door from above with respect to the opening 4 of the thermo-hygrostat 3 about the hinge axis located on the lower side, and rotate the hinge axis located on the upper side. The door 10 may be opened and closed from below as a moving center. Further, in the present embodiment, the double-door type door opening / closing device is attached to the thermo-hygrostat 3, but not limited to the thermo-hygrostat 3, the refrigerator or vending machine is provided with the double-door type door opening / closing device. Is also good.
[0043]
【The invention's effect】
According to the first aspect, the double-opening type opening / closing device includes a shaft protruding from both left and right or upper and lower ends of the main body, a bearing member provided on the door, and having a groove in which the shaft is detachably engaged. A lock member that is rotatable with respect to the groove and locks a shaft that comes out of the groove, and a handle that is operated when the lock member is rotated to open the door. This eliminates the need for a plurality of members such as a hinge plate and a fixed plate, so that the number of parts of the double-door opening and closing device can be reduced and the structure can be simplified. In addition, since there is no need to provide a plurality of members inside the door, the limitation on the amount of heat insulating material to be filled in the door is relaxed, so that the heat insulation of the door can be improved.
[0044]
According to the second aspect, the pair of left and right or upper and lower grooves are disposed so as to expand toward the open side of the door, and engage with the other groove when the shaft that engages with one groove is opened. Since the mating shaft is pushed deep into the groove, both shafts do not come out of both the left and right or upper and lower grooves at the same time. That is, it is possible to prevent the door from falling from the main body.
[0045]
According to the third aspect, a link for connecting the pair of left and right or upper and lower lock members is provided, and when the claw of one lock member retreats from the groove, the claw of the other lock member advances into the groove. Therefore, both shafts do not come out of both the left and right or upper and lower grooves at the same time. That is, it is possible to prevent the door from falling from the main body.
[0046]
According to the fourth aspect, the double-opening type opening / closing device is provided with a shaft protruding from both left and right or upper and lower ends of the main body, a guide provided on substantially a half circumference around the shaft, and a door provided with the shaft. By providing a bearing member having a groove that freely engages and a cam provided around the depth of the groove, a plurality of members such as a hinge plate and a fixing plate are not required. The number of parts of the switchgear can be reduced and the structure can be simplified. In addition, since there is no need to provide a plurality of members inside the door, the limitation on the amount of heat insulating material to be filled in the door is relaxed, so that the heat insulation of the door can be improved. Further, since the groove is arranged so as to expand toward the opening side of the door, both shafts do not come off simultaneously from both the left and right or upper and lower grooves. That is, it is possible to prevent the door from falling from the main body. Further, the guide and the cam are arranged so as to face each other with the door closed, and at the beginning of opening of the door, the cam on the shaft side is guided by the guide. When the door opens, the cam enters the inner periphery of the guide.
Therefore, during the operation of opening the door, the door does not rattle or come off the main body.
[Brief description of the drawings]
FIG. 1 is a partial perspective view showing a thermo-hygrostat to which a double door opening and closing device according to a first embodiment of the present invention is attached.
FIG. 2 is a perspective view showing a door of the thermo-hygrostat shown in FIG. 1, illustrating a structure of a double-door opening and closing device.
FIG. 3 is a top view of the door shown in FIG. 2, illustrating the double-door opening / closing device when the door is closed.
FIG. 4 is a top view of the door shown in FIG. 2, illustrating the double-sided door opening and closing device when the door is open.
FIG. 5 is a schematic diagram illustrating another example of the shape of the double-door opening / closing device according to the first embodiment of the present invention.
FIG. 6 is a perspective view showing a door of the thermo-hygrostat shown in FIG. 1, illustrating a structure of a double-door opening and closing apparatus according to a second embodiment of the present invention.
FIG. 7 is a cross-sectional view illustrating a double-door opening / closing device when the door is closed.
FIG. 8 is a cross-sectional view illustrating a double-door opening / closing device when the door is opened.
FIG. 9 is a cross-sectional view illustrating a double door opening / closing device when the door is opened.
FIG. 10 is an operation diagram showing a part of the double-door opening / closing device, and is a diagram for explaining a change from the state of FIG. 8 to the state of FIG. 9;
FIG. 11 is a schematic diagram illustrating a door opening / closing guide and a guide receiving claw provided in the double door opening / closing device.
FIG. 12 is a sectional view when both handles are pulled.
[Explanation of symbols]
1, 2 door opening and closing device
3 Constant temperature and humidity chamber
4 opening
5 Projection
6a, 6b hinge axis
7a, 7b Guide around axis
8a, 8b Guide receiving claw
10,20 door
11a, 11b Lock handle
12a, 12b Door bearing
13a, 13b, 22a, 22b groove
14a, 14b Lock member
15a, 15b nail
16a, 16b Lock shaft
17a, 17b spring
18a, 18b Mounting shaft
19 Link axis
21a, 21b Door bearing
23a, 23b Bearing cam
24a, 24b convex part
25a, 25b Door opening and closing guide

Claims (4)

A double-door opening and closing device that opens and closes a door attached to the main body from any side,
Shafts protruding from both the left and right or top and bottom ends of the main body to which the door is attached,
A bearing member provided in the door, the bearing member having a groove in which the shaft is detachably engaged from an open side of the door;
A lock member incorporated into the bearing member and having a claw for locking the shaft coming out of the groove so as to be rotatable with respect to the groove, and a rotation member disposed so that the rotation shaft substantially coincides with the shaft;
A double-sided door opening / closing device comprising: a handle attached to a side surface of the door so as to rotate a shaft connected to the lock member; and a handle operated when the door is opened. The pair of left and right or upper and lower grooves are disposed so as to expand toward the opening side of the door, and when the shaft that engages with one groove is opened, the shaft that engages with the other groove is The double-door opening / closing device according to claim 1, wherein the door is pushed into the back. 2. The double door according to claim 1, wherein a link is provided for connecting the pair of left and right or upper and lower lock members, and when the claw of one lock member is retracted from the groove, the link advances to the claw or groove of the other lock member. Type door opening and closing device. A double-door opening and closing device that opens and closes a door attached to the main body from any side,
A shaft protruding from both the left and right or top and bottom ends of the main body to which the door is attached, and a guide provided substantially half way around this shaft,
A bearing member is provided on the door, the bearing member having a groove in which the shaft is detachably engaged from an open side of the door, and a cam provided around the depth of the groove,
The pair of left and right or upper and lower grooves are disposed so as to expand toward the open side of the door,
The guide and the cam are disposed so as to face each other with the door closed, and when the door is opened, the cam is formed so as to enter the inner periphery of the guide,
A double-opening door opening / closing device, wherein the cam on the side serving as a shaft is guided by the guide at the beginning of opening of the door, and a convex portion for pushing the shaft into the depth of the groove is provided on the cam.

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