JP4416136B2 - Door closing device - Google Patents

Description

  The present invention relates to a door closing device for rotating in a closing direction of a one-sided door and pulling the door to the main body side to close when the end of the closing operation is reached.

For example, in a device such as a constant temperature and humidity chamber or a refrigerator, if the device is operated with the door not completely closed, cold air or hot air leaks to the outside, resulting in an accident, There is a problem that the operation is hindered. In order to prevent such an accident and solve the problem, a device for automatically closing the door is required.
The present applicant has already developed a door automatic closing device, which is known as Patent Document 1 and Patent Document 2. Patent Document 1 discloses an automatic lock device that is applied to a door that is opened to the left and right. A dead bolt that can be advanced and retracted is provided on one door, a receiving seat is provided on a door frame, and the other door is provided on one door. When it hits, what a dead bolt fits into a receiving seat and locks is disclosed. Japanese Patent Application Laid-Open No. H10-228707 discloses a vehicle sliding door that is supported in a suspended manner by pulling it toward the vehicle body side at the end of the closing operation.

However, the invention of Patent Document 1 is intended for a door with double doors on the left and right, and the invention of Patent Document 2 is intended for a sliding door for automobiles. It cannot be applied to a pivoted single door.
JP 2001-317258 A JP-A-08-58385

  Accordingly, it is an object of the present invention to automatically and forcibly when the door reaches the end of the closing operation so that the device is not operated accidentally with the half-open door closed halfway. Another object of the present invention is to provide a door closing device that can be closed by being pulled toward the main body.

Hereinafter, means for solving the problems will be described with reference numerals in the accompanying drawings.
In the present invention, when the door 41 pivotally attached to the fixed-side main body 43 is rotated in the closing direction and reaches a predetermined position, the door 41 is pulled toward the main body 43 and closed. A pivot arm 13 provided on either the door 41 side or the main body 43 side, and a latch member 18 provided on the other side so as to be engageable with and removable from the receiving portion 13c of the pivot arm 13; The latch member 18 is engaged with the receiving portion 13c of the pivot arm 13, and the latch arm 18 is pulled via a transmission mechanism to pull the pivot arm 13 to a predetermined position in the latched state or release the latch. When the drive means 20 for driving the door 41 and the door 41 are closer to the main body 43 than the first predetermined position, the pivot arm 13 is pivoted from the initial position, and the receiving portion 13c is moved to the latch member 18 side. Actuating means 23a for protruding, 23b and when the door 41 is closer to the main body 43 than the first predetermined position and reaches the second predetermined position, the protruding latching member 18 is engaged with the receiving portion 13c of the rotating arm 13. Therefore, a sensor 19 for starting the driving means 20 is provided , and the rotary arm 13 is rotated by operating from the inside of the fixed-side main body 43 to release the hooking portion 13c from the hooking member 18. There is provided a door closing device 10 characterized by comprising means .
In another embodiment of the present invention, the door is replaced with a means for operating the inside of the fixed-side main body 43 to rotate the turning arm 13 and releasing the receiving portion 13c from the hooking member 18. 2. The door closing device 10 according to claim 1, further comprising means for rotating the rotating arm 13 by operating from the outside of the door and releasing the receiving portion 13 c from the hooking member 18. Is done.
In the present invention, the pivot arm 13 and the latching member 18 may be attached to different sides of the door 41 and the stationary main body 43, respectively.
For example, even when the latching member 18 is provided on the door 41 side and the rotating arm 13 is provided on the fixed-side main body 43, when the door 41 is closer to the main body 43 than the first predetermined position, The moving arm 13 is rotated from the initial position so that the receiving portion 13c protrudes toward the hooking member 18, and the door 41 is closer to the main body 43 than the first predetermined position and reaches the second predetermined position. When this occurs, the driving means 20 is started by the sensor 19 to rotate the latch member 18, and the latch member 18 is engaged with the receiving portion 13 c of the pivot arm 13. When the latching member 18 is further rotated in this engaged state, the receiving portion 13c of the pivoting arm 13 and the latching member 18 are relatively attracted, and the door 41 is pulled toward the main body 43 and closed.

  In the door closing device 10 of the present invention, the actuating means 23a and 23b are provided on the first magnet 23a provided on the side (main body 43 side) on which the hooking member 18 exists and on the rotating arm 13. The second arm 23b can be configured so that the first magnet 23a and the second magnet 23b are relatively close to each other, and the magnetic force is applied to each other, so that the rotating arm 13 can be configured. It can be rotated from the initial position.

  In the door closing device of the present invention, when the door reaches the end of the closing operation, the door is drawn to the main body side and automatically and forcibly closed. This prevents the device from being operated.

  Hereinafter, the present invention will be described with reference to the drawings, but the present invention is not limited thereto.

  FIG. 1 is a perspective view of a constant temperature and humidity chamber 40 to which the door closing device 10 of the present invention is applied. The constant temperature and humidity chamber 40 is configured such that a door 41 is pivotally attached to a main body 43 by a pivot such as a hinge 42 and the door 41 is provided with an opening / closing handle 44 and is configured to open and close on one side. The door closing device 10 can be provided at a position opposite to the main body 43. Although not shown, the door closing device 10 can be applied to a single door in a building such as a relatively large refrigerated warehouse where an operator can enter and exit the room.

  FIG. 2 is an enlarged perspective view of the door closing device 10 and is shown in a perspective view so that the internal configuration can be easily understood. The door closing device 10 includes a first unit 11 provided on the door 41 and a second unit 12 provided on the main body 43. In the first unit 11, a rotating arm 13, an external lock release unit 14, and an external lock release button 15 are provided inside a casing 16. A part of the internal lock release unit 17 that is selectively attached extends into the first unit 11. On the other hand, in the second unit 12, the latch member 18, the sensor 19, the drive motor 20, and the transmission mechanism 21 are provided inside the casing 22. Further, the first magnet 23a as the operation means is provided on the first unit 11 side, and the second magnet 23b as the operation means is provided on the second unit 12 side.

Next, each configuration on the first unit 11 side will be described in more detail.
The pivot arm 13 has an arm body 13a pivotally attached to the inside of the casing 16 by a pivot 13b, a receiving portion 13c formed at one end of the arm body 13a, and a first magnet 23a fixed to the other end of the arm body 13a. Has been.
As shown in FIG. 3, the receiving portion 13c is angled by about 90 ° with respect to the axis of the arm main body 13a. That is, as shown in FIG. 5, even when the latching shaft 18b is engaged with the receiving portion 13c, when the force in the direction of arrow F acts on the arm body 13a, the arm body 13a rotates in the direction of arrow R2, The receiving portion 13c is formed in such a shape that the hooked state can be released.

  As shown in FIG. 3, when the door 41 is opened and the first unit 11 and the second unit 12 are separated by a predetermined distance or more, the first magnet 23a holds the arm body 13a in a substantially vertical posture (initial stage). It also has a function as a weight for holding in position.

  The external unlocking unit 14 can use an existing unit of a cylinder lock. For example, a shaft-shaped member (not shown) is inserted into the outer cylinder member 14a, and this shaft-shaped member can be rotated by a key 14c inserted into the key hole 14b at the rear end. An unlocking member 14d can be integrally formed at the tip of the. With such a configuration, the unlocking member 14d operated with the key 14c rotates in the direction of the arrow R1 from the position of FIG. 2, butts against the end of the rotating arm 13 and rotates in the direction of the arrow R2, The receiving portion 13c is released from the engaging shaft 18b.

  The external lock release button 15 is connected to a control device (not shown) for starting the drive motor 20 in the reverse direction by wiring. That is, when the door 41 is closed and locked, pushing the door 41 activates the drive motor 20 to rotate the latching shaft 18 b of the latching member 18 via the transmission mechanism 21. The engagement is released from the part 13c. The external lock release unit 14 described above is used as a preliminary lock release means when the external lock release button 15 is not activated due to a power failure or the like.

  For example, when the door closing device 10 is provided on a single door such as a relatively large refrigerated warehouse, the internal unlocking unit 17 is operated in the freezer to release the lock and evacuates from the freezer. It is provided as a means. The internal lock release unit 17 has a handle 17a that can be operated from inside the room, fixed to the shaft member 17b, and the shaft member 17b extends into the casing 16 of the first unit 11 and is fixed to the end of the shaft member 17b. An unlocking shaft 17d is projected from the plate 17c. Therefore, when the handle 17a is rotated in the direction of the arrow as shown in FIG. 6, the unlocking shaft 17d is rotated to hit the rotating arm 13, and the rotating arm 13 is rotated in the direction of the arrow R2 in FIG. As a result, the receiving portion 13c is released from the engaging shaft 18b.

Next, each component on the second unit 12 side will be described in more detail.
The latch member 18 has a worm wheel 18a (rotating body) provided with a latch shaft 18b. The pivot range of the worm wheel 18a is such that the latch shaft 18b is moved from the position shown in FIG. Limited to the range of movement to the position. This is because the stop sensors 24a and 24b (see FIG. 7) are arranged so as to come into contact when the latching shaft 18b reaches the position shown in FIGS. That is, when the latching shaft 18b comes into contact with the stop sensors 24a and 24b, a signal is sent to a control device (not shown), and the drive motor 20 is controlled to stop.

  As shown in FIG. 3, the sensor 19 is formed so as to protrude from the casing 22 of the second unit 12 by a predetermined length. When the sensor 19 comes into contact with a predetermined position of the first unit 11, Is transmitted to the control device, and the drive motor 20 is controlled to start.

  The drive motor 20 is controlled by a control device and rotates in both forward and reverse directions. The drive force is transmitted to the worm wheel 18a via the transmission mechanism 21, and the worm wheel 18a is moved from the state shown in FIG. Is rotated in the reverse direction from the state of FIG. 5 to the state of FIG.

  The transmission mechanism 21 is provided above the gear 21c on the rotary shaft 21b, a gear 21a attached to the rotary shaft of the drive motor 20, a gear 21c fixed to the rotary shaft 21b so as to mesh with the gear 21a. This is composed of a worm 21d.

The second magnet 23b has the same polarity as that of the first magnet 23a, and is fixed at a position facing the first magnet 23a in the second unit 12, as shown in FIG. When the door 41 is rotated in the closing direction and comes closer to the main body 43 than the predetermined position, the magnets 23a and 23b rotate the rotating arm 13 from the initial position (position in FIG. 3) to receive the receiving portion 13c. It functions as an operating means for projecting toward the latch member 18 side. That is, when the first magnet 23a approaches the second magnet 23b to a predetermined position, the two magnets 23a and 23b repel each other, and the repulsive force causes the rotating arm 13 to rotate. 4, the receiving portion 13c protrudes toward the second unit 12 side.
In addition, the 1st magnet 23a and the 2nd magnet 23b are not limited to the thing of the same pole, It is also possible to use a magnet of a different pole. In this case, although not shown, both the magnets are provided at positions different from those shown in FIGS. 2 to 5 so that the rotating arm 13 rotates as shown in FIG. Deploy.

Next, the operation of the door closing device 10 of the present invention will be described.
As described above, when the door 41 is rotated in the closing direction and comes closer to the main body 43 side than the predetermined position (first predetermined position), the rotation is caused by the action of the first magnet 23a and the second magnet 23b. The moving arm 13 rotates from the initial position (the position in FIG. 3), and the receiving portion 13c protrudes toward the latching member 18 side. When the door 41 is further rotated in the closing direction to reach a predetermined position (second predetermined position), the sensor 19 comes into contact with the predetermined position of the first unit 11, and the signal transmitted from the sensor 19 is controlled by the control device. Then, the drive motor 20 is controlled to start.
Thereby, the force from the drive motor 20 is transmitted to the worm wheel 18a via the transmission mechanism 21, and the worm wheel 18a rotates from the position of FIG. 3, reaches the position of FIG. It engages with 13 receiving portions 13c. Furthermore, since the drive motor 20 is driven slightly and the worm wheel 18a rotates, the latching shaft 18b pulls the rotating arm 13 to a predetermined position while being engaged with the receiving portion 13c. As a result, the door 41 is automatically pulled toward the second unit 12 via the rotating arm 13 and closed, so that the device such as the constant temperature and humidity chamber 40 is operated with the door 41 opened halfway. This is prevented.
When the door 41 is closed, the latching shaft 18b is engaged with the receiving portion 13c and is in a locked state. Therefore, the door 41 cannot be opened simply by pulling the opening / closing handle 44 of the door 41. Therefore, when opening the door 41, the external lock release unit 14 or the external lock release button 15 is operated.
For example, if the external unlocking unit 14 is operated, the unlocking member 14d rotates in the direction of the arrow R1 from the position shown in FIG. 2, and hits the end of the rotating arm 13 and rotates in the direction of the arrow R2. The receiving portion 13c of the rotating arm 13 is released from the latching shaft 18b, and the door 41 can be opened.
When the external lock release button 15 is operated, the drive motor 20 operates in the reverse direction when the door 41 is closed, and the worm wheel 18a rotates in the reverse direction to the arrow R3 in FIG. The shaft 18b is released from the receiving portion 13c of the rotating arm 13, and the door 41 can be opened.

It is a perspective view of the constant temperature and humidity chamber to which the door closing device concerning the present invention is applied. It is the perspective view and transparent drawing which expanded and showed the door closing apparatus. It is sectional drawing of a door closing apparatus when the door is open. It is sectional drawing of a door closing apparatus when a door rotates in a closing direction and reaches a predetermined position. It is sectional drawing of a door closing apparatus when a door is closed. It is a perspective view of the handle in an internal lock release unit. It is a side view of a latching member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Door closing device 11 1st unit 12 2nd unit 13 Rotating arm 13c Receiving part 13b Axis transmission mechanism 14 External lock release unit 15 External lock release button 16 Casing 17 Internal lock release unit 18 Latching member 18a Warm wheel (rotating body )
18b Latching shaft 19 Sensor 20 Drive motor (drive means)
21 Transmission mechanism 21a Gear (Transmission mechanism)
21b Rotating shaft (transmission mechanism)
21c Gear (Transmission mechanism)
21d Worm (Transmission mechanism)
23a First magnet (actuating means, weight)
23b Second magnet (actuating means)
40 Temperature and humidity chamber 41 Door 43 Body

Claims (2)

When the door pivotally attached to the main body on the fixed side rotates in the closing direction and reaches a predetermined position, it is a device for pulling the door to the main body side and closing it, either the door side or the main body side A pivoting arm provided on one side, a latching member provided on the other side so as to be detachable and attachable to the receiving part of the pivoting arm, and the latching member hooked on the receiving part of the pivoting arm In the engaged state, the rotating arm is pulled to a predetermined position, or driving means for driving the engaging member via a transmission mechanism to release the engagement, and the door is closer to the main body than the first predetermined position. And an operating means for rotating the rotating arm from an initial position to cause the receiving portion to protrude toward the latching member, and the door is closer to the main body than the first predetermined position, and the second predetermined When reaching the position, the hooking member in the protruding state is moved to the rotating arm. Order to engage the receiving portion, and a sensor for starting the driving means, and operating from inside the body of the stationary side by rotating the rotary arm, means for releasing engagement of the receiving part from said latch member The door closing device characterized by having. Operate from the inside of the main body on the fixed side to rotate the rotating arm, instead of means for releasing the hook from the hook member,
The door closing device according to claim 1, further comprising means for operating from the outside of the door to rotate the rotating arm and releasing the receiving portion from the hooking member.

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