JPH0744939Y2 - Door opener - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an opening / closing device for a door such as a refrigerator or a four-sided glass showcase, and more particularly, to a device that can be opened / closed from any left or right side.

<Prior Art> Generally, doors such as refrigerators and four-sided glass showcases are
It can be opened and closed only from one of the left and right sides, and at the time of manufacture it was decided to be either so-called right opening or left opening. Therefore, at the time of purchase, the user must select the right-open or left-open one in consideration of the location. However, if the location of the refrigerator is changed by changing the design after purchase, there are inconveniences such as a difficulty in opening the door due to an obstacle such as a wall, or limitation of the storage location.

Therefore, the applicant of the present application has already proposed a structure that can be opened and closed from any side (see Japanese Patent Application No. 63-294150).

An example of the door opening / closing device of the previously-noted prior application will be described with reference to FIGS. 6 and 7. That is, hinge pins 62, 63 are provided on both left and right sides of the main body 61 to which the door 60 is attached, and engagement grooves 64, 65 on which the hinge pins 62, 63 can be detachably engaged are provided above and below the door 60. A rectangular fixing plate 66 is provided. The left and right parts of the fixed plate 66 are engaged with the hinge pins 62 and 63 by latch grooves 67 and 68 opened to the outer diameter side so as to be engageable and disengageable, and the hinge pins are restrained in the engagement grooves 64 and 65. The elliptical latch plates 69 and 70 are rotatably attached. Between these latch plates 69 and 70, the other latch plate 69 (70) is linked to the rotation of the one latch plate 69 (70) in the restraint release direction. The plate 70 (69) is prevented from rotating, and the latch plate 69 (70) is rotated in a direction opposite to the direction of releasing the restraint of the other latch plate 69 (70). A connecting member 71 for releasing the is provided. The connecting member 71 includes a pair of I-shaped swing links 72 and 73 pivotally attached to the fixed plate 66 near the left and right latch plates 69 and 70, respectively.
The rocking links 72, 73 are composed of a straight connecting link 74 that connects the one ends thereof.

The swing guides 72, 73 have slide guides 75A, 7
6A and the stopper portions 75B, 76B are provided with lock grooves 75, 76 formed by bending in a substantially L shape, while the latch plates 69, 70 are provided.
Lock pins 77 and 78 that engage with the lock grooves 75 and 76 and restrict the rotation of the latch plate are provided in the projection.

Next, the opening / closing operation will be described.

As shown in FIG. 6, the latch grooves 67, 68 of the respective latch plates 69, 70
Are facing outwards to the left and right, the latch grooves 67 and 68 intersect the engaging grooves 64 and 65, and the hinge pin 6 is located in the intersection.
2,63 are restrained, and as a result, the door 60 is held closed.

Here, when the door 60 is opened from the left, a force acts in the direction in which the left hinge pin 62 is pulled out from the engagement groove 64, and accordingly, a rotational force in the left latch plate 69 in the clockwise direction, that is, the restraint releasing direction is applied. To work. At this time, the lock pin 77 provided on the latch plate 69 is located at the corner of the lock groove 75 and can slide the slide guide portion 75A. When the lock pin 77 slides along the slide guide portion 75A, the latch plate 6
The 9 rotates clockwise as shown in FIG. When the latch plate 69 rotates by a certain angle, the opening of the latch groove 67 coincides with the opening of the engaging groove 64. This allows the hinge pin 62 on the left side to come out of the engagement groove 64.

On the other hand, the lock pin 77 of the left latch plate 69 is
By sliding the slide guide portion 75A of the lock groove 75 with the rotation of 69, the swing link 72 swings in the clockwise direction, and the other (right side) swing link via the connecting link 74. Swing 73 in the same direction. By the swing of the connecting member 71, the end of the swing link 73 moves in the direction away from the latch plate 70 on the other side, that is, on the right side of the latch plate 70, so that the swing link 73 is locked. The lock pin 78 fits into the stopper portion 76B of the groove 76. With this, the latch plate 7
0 cannot rotate in either direction. By blocking the rotation of the latch plate 70, the right hinge pin 63 is maintained in the restrained state.

In this way, the right hinge pin 63 is constrained in the inner part of the engagement groove 65 and the left hinge pin 62 can be pulled out from the engagement groove 64, so that the door 60 is opened with the right hinge pin 63 as the center of rotation. Will be done.

Also, when trying to open the door 60 from the left as described above,
The lock pin 78 of the right latch plate 70 fits into the stopper portion 76B of the swing link 73 to prevent the latch plate 70 from rotating, so that the right side of the door 60 is smoothly and reliably locked.

In the refrigerator, the lower side of the door 60 is always subjected to a force to open the door 60 on both sides of the door 60 due to the load of food or the like stored in the internal pocket of the door 60. An elastic packing is provided to prevent cold air from leaking to the outside through the gap between the main body and the repulsive force of this packing, which constantly works to push the door 60 to the outside. This is very effective because the side opposite to the open side is smoothly and surely locked as described above.

When closing the door 60 opened as described above, the left side portion of the door 60 may be pushed in the closing direction. With the closing movement of the door 60, the left hinge pin 62 fits into the corresponding engaging groove 64, but at the same time, the hinge pin 62 is received in the latch groove 67 of the latch plate 69 and is moved counterclockwise by the latch plate 69. Gives rotational force. At this time, since the lock pin 77 is at the tip of the slide guide portion 75A of the lock groove 75 and the latch plate 69 is in a state capable of rotating in the counterclockwise direction, the rotation force is applied from the hinge pin 62 in the counterclockwise direction. It rotates and returns to the state of FIG. 6, and the hinge pin 62 is again restrained in the inner part of the engaging groove 64.

Further, as the latch plate 69 rotates counterclockwise, the lock pin 77 returns to the bent corner portion of the lock groove 75.
Also returns to the neutral position in FIG.

When the door 60 is opened and closed from the right side, the door 60 is opened and closed by an operation that is the opposite of the above, so the description of the operation is omitted.

If both the left and right parts of the door 60 are pulled in the opening direction at the same time, the hinge pins 62 and 63, the latch plates 69 and 70, and the lock pin 7 on both the left and right sides.
The swinging force in the clockwise direction and the swinging force in the counterclockwise direction act on the swinging links 72, 73 via the 7, 78 and the lock grooves 75, 76, so that the connecting member 71 swings in either direction. It doesn't move.
Therefore, rotation of each latch plate 69, 70 is blocked, and as a result, each hinge pin 62, 63 does not come out of the engagement groove 64, 65, and the door 60 is maintained in the closed state.

<Problems to be solved by the invention> By the way, since the connecting link 74, which interlocks the two swinging links 72 and 73 engaged with the left and right latch plates 69 and 70, is a single piece whose dimension does not change, When the dimension in the direction (length length) is changed in various ways, it is necessary to prepare a large number of connecting links 74 having different dimensions depending on the type of the door, which makes the inventory management complicated.

Further, since the left and right swing links 72, 73 are interlocked and linked by a single dimension-invariant connecting link 74, the lock grooves 75, 76 of the left and right swing links 72, 73 and the left and right latch plates 69, If the relative position of each lock pin 77, 78 of 70 is managed with high accuracy,
The door 60 may be difficult to open or close.

There is some room for improvement in this respect.

The present invention was created in view of such circumstances, and like the door opening device of the above-mentioned prior application, the side opposite to the opening side of the door can be smoothly and reliably locked and the opening and closing of the door can be smoothly performed. In addition, the object is to make the parts common, and to allow the door to be opened and closed smoothly without managing the arrangement position of the parts with high accuracy.

<Means for Solving the Problem> In order to achieve such an object, the present invention has the following configuration.

The door opening / closing device of the present invention has hinge pins projecting from the left and right ends of either the door or the main body to which the door is attached, and the hinge pin is releasably engaged with the other from the opening side of the door. And a latch plate for engaging and disengaging the hinge pin by latch grooves that open to the outer diameter side to lock the hinge pin in the engagement groove. A plate is rotatably mounted, and between these two latch plates, a rotation blocking state is established in which the rotation of one latch plate is linked to the rotation of the latch plate in the restraint release direction to block the rotation of the other latch plate. A connecting member that releases the rotation blocking state of the other latch plate is provided in association with rotation in a direction opposite to the releasing direction, and the connecting member is swingably provided at both left and right ends of the fixed plate. Rocking Link and a connecting link that connects one ends of the two swing links to each other, and a slide guide portion and a stopper portion are formed in a bent shape on either one of the latch plates or each of the swing links. A lock groove is provided, and on the other side, a lock pin that engages with the lock groove to restrict rotation of the latch plate is provided in a protruding manner. It is provided with change adjusting means for enabling the change adjustment of.

<Operation> The opening / closing operation of the door is similar to that of the door opening / closing device of the above-mentioned prior application. Since it is performed by the lock groove provided in the rocking link and the lock pin that engages with the rocking link, the side opposite to the opening side of the door can be smoothly and reliably locked, and the opening and closing of the door can be smoothly performed.

Further, when the length of the door in the left-right direction changes, the change adjusting means changes and adjusts the length of the connecting link in accordance with the distance between the two swing links associated with the change in the length of the door. Therefore, it is not necessary to prepare a large number of connecting links having different sizes.

Further, even if the relative positions of the lock pins and the lock grooves are not managed with high accuracy, the deviation of the relative positions in the assembled state can be absorbed by appropriately changing the length dimension of the connecting link. , The opening and closing operation of the door becomes smooth.

<Embodiment> An embodiment of the present invention will be described below in detail with reference to the drawings.

1 to 3 show a first embodiment of the present invention. Here, an embodiment having a configuration similar to the configuration illustrated as the door opening / closing device of the above-mentioned prior application is shown,
The same parts and portions as those of the door opening / closing device of the prior application are designated by the same reference numerals, and detailed description thereof will be omitted.

In this embodiment, the structure different from the prior application is that two bars 74A and 74B are connected by screws 74C as a connecting link 74 connecting the left and right swing links 72 and 73. In the present embodiment, the fixed plate 66 is also divided into left and right independent plates, which are labeled 66A and 66B, respectively.

Specifically, the first bar 74A of the two bars 74A, 74B has a shape that is bent in a stepwise manner in a thickness direction at a predetermined position in the longitudinal direction, and one end of the bar has a longitudinal direction. A long hole 74A ₁ is formed along the direction. A screw hole 74B ₁ is formed at one end of one of the second bars 74B. Then, in order to connect the both, the respective end portions of both bars 74A and 74B are overlapped with each other, the screw 74C is inserted from the long hole 74A ₁ side of the first bar 74A, and the screw hole of the second bar 74B is inserted. It is done by screwing it onto 74B ₁ .

In the present embodiment, the change hole adjusting means for changing and adjusting the length dimension of the connecting link 74 is constituted by the long hole 74A ₁ , the screw hole 74B ₁ and the screw 74C formed in the two bars 74A, 74B, respectively. .

That is, in this connecting link 74, the connecting link 74 is set by appropriately setting the overlapping amount of both bars 74A and 74B.
The length dimension of can be adjusted arbitrarily.
The length of the connecting link 74 is different from that of the swing links 72, 73 due to the difference in the length of the door in the left-right direction. It is no longer necessary to prepare a large number of connecting links having different length dimensions as in the conventional case. Further, in this embodiment, the fixing plates 66A and 66B can be commonly used regardless of the size of the door.

The opening / closing operation of the door of this embodiment is similar to the opening / closing operation of the door of the above-mentioned prior application, and therefore, also in this embodiment,
The side opposite to the open side of the door can be smoothly and reliably locked, and the door can be opened and closed smoothly.

The present invention is not only applied to the structure of the above embodiment, but can be applied to the structure shown in FIGS. 4 and 5. In the door opening / closing device of this embodiment, the difference from the structure of the first embodiment is mainly that the latch plates 69 and 70 are provided with the lock grooves 75 and 76 while the swing links 72 and 73 are provided with the lock pins. 77 and 78 are provided to prevent the lock plates from being locked to the hinge pins 62 and 63 of the latch plates 69 and 70, and to ensure that the operation at the time of locking and at the time of releasing 6 is smooth and reliable. Slits between the fixing plates 66A, 66B and the latch plates 69, 70
0,81 is provided.

The configuration of the connecting link 74 here is the first
The same as described in the embodiment. Further, other configurations are similar to those of the first embodiment, and therefore detailed description thereof is omitted here.

The operation of the above configuration will be described.

As shown in FIG. 4, the latch grooves 67, 68 of the respective latch plates 69, 70
With the openings of the
8 intersects with the engaging grooves 64, 65, the hinge pins 62, 63 are restrained in the intersecting portions, and the state is maintained by the force of the springs 80, 81 to expand, so that the door 60 is held closed. In this state, the lock pins 77 and 78 of the swing links 72 and 73 are pressed against the intermediate bent portions of the lock grooves 75 and 76 of the latch plates 69 and 70.

Here, when the door 60 is opened from the left side, an operator holds a not-shown operation recess provided in the door 60 and pulls it toward you, similar to the door opening / closing device of the prior application. As a result, when the left hinge plate 62 that is immovable rotates the left latch plate 69 in the clockwise direction while compressing the spring 80, the position of the lock pin 77 in the lock groove 75 is displaced, and the latch plate 69 moves. When it exceeds half of the rotation angle, the force to expand the spring 80 is also given,
The left latch plate 69 is swiftly rotated clockwise. At that time, since the connecting link 74 is pulled to the left side in the figure, the right latch plate 70, the swing link 73, etc. are held immovably in the closed state. With the rotation of the left latch plate 69, the door 60 moves to the fifth position with the right hinge pin 63 as the center of rotation.
It will be opened as shown.

In this state, the force of expanding the spring 80 on the left side is still urged by the latch plate 69,
The latch plate 69 is held as it is.

The above operation is continuously performed.

If you want to close the door 60 opened as above,
It suffices to push the left side portion of the main body 61 toward the main body 61 side, whereby the latch plate 69 is engaged with the hinge pin 62 and the latch plate 69 is swung counterclockwise by the spring 80, as shown in FIG. The door 60 is closed.

By the way, when the door 60 is opened and closed from the right side, it is realized by an operation that is the opposite of the above-described operation, so the description of the operation is omitted.

In the above embodiment, the hinge pins 62 and 63 are provided on the main body 61 side, and the fixing plates 66A and 66B are provided on the door 60 side, but the reverse relationship, that is, the hinge pins 62 and 63 are provided on the door 60 side. Alternatively, the fixing plates 66A and 66B may be provided on the main body 61 side for implementation.

<Effect of the Invention> As described above, according to the present invention, the rotation of the latch plate for restraining the hinge pin in the engaging groove is prevented and the lock plate is provided with the lock provided on the swing plate of the latch plate or the connecting member. Since it is performed by the groove and the lock pin that engages with the groove, the side opposite to the opening side of the door can be smoothly and reliably locked, and the door can be opened and closed smoothly. Since the load is applied in the direction of opening the door due to the load of the food or the like stored in or the elastic force of the cold air sealing packing, the present invention capable of a smooth and reliable lock is extremely suitable for a refrigerator.

Further, according to the present invention, since the length dimension of the connecting link can be appropriately changed and adjusted, it is common for the left and right swing links having different spacings depending on the length of the door. Connection links can be used. Therefore, it is not necessary to prepare a large number of connecting links having different lengths as in the conventional case, which simplifies manufacturing and inventory management and contributes to cost reduction.

Further, even if the relative position of the lock pin and the lock groove provided on the swing link and the latch plate is not set with high accuracy, a slight deviation of the relative position can be absorbed by changing and adjusting the length of the connecting link. As a result, the door can be opened and closed smoothly.

[Brief description of drawings]

1 to 3 show a door opening / closing device according to a first embodiment of the present invention, FIG. 1 is a plan view showing a closed state of the door, and FIG. 2 is a plan view showing an open state of the door. FIG. 3 is a front view showing a main part of the connecting link. 4 and 5 are a door opening / closing device according to a second embodiment of the present invention, FIG. 4 is a plan view showing a closed state of the door, and FIG. 5 is a plan view showing an open state of the door. . 6 and 7 are door opening / closing devices of the prior application, FIG. 6 is a plan view showing a closed state of the door, and FIG. 7 is a plan view showing an open state of the door. 60 …… door, 61 …… main body, 62,63 …… hinge pin, 64,65…
… Engagement groove, 66A, 66B …… Fixing plate, 67,68 …… Latch groove, 6
9,70 …… Latch plate, 71 …… Coupling member, 72,73 …… Swing link, 74 …… Coupling link, 74A, 74B …… Bar, 74C …… Screw, 75,76 …… Lock groove, 77 , 78 …… Lock pin.

Claims (1)

[Scope of utility model registration request] Claims: 1. A hinge pin is provided at both left and right ends of a door or a main body to which the door is attached, and the other hinge pin is engageable with the hinge pin from the open side of the door. A fixing plate having a groove is provided, and a latch plate that engages and disengages with the hinge pin by a latch groove that opens to the outer diameter side and locks the hinge pin in the engaging groove is rotatable. Between these two latch plates is in a rotation blocking state in which the rotation of one latch plate is linked to the rotation of the other latch plate in the constraint release direction, and the rotation of the other latch plate is blocked. A coupling member that releases the rotation blocking state of the other latch plate in association with the reverse rotation is provided, and the coupling member is swingably provided at both left and right ends of the fixed plate. Link and this And a connecting link that connects one ends of both swing links to each other, and a lock groove in which a slide guide portion and a stopper portion are formed in a bent shape is formed on either one of the latch plates or each of the swing links. On the other hand, a lock pin that engages with the lock groove and restricts the rotation of the latch plate is provided on the other side, and the length of the connecting link is adjusted according to the distance between the swing links. A door opening / closing device, characterized in that it is provided with a change adjusting means for enabling the above.