JP7064377B2 - Hinged door - Google Patents

Description

The present invention relates to a hinged door capable of eliminating the differential pressure.

In Patent Document 1 below, a movable body is provided on the fire door. The movable body is rotatably supported by the fire door. The fire door is fixed to the door frame by the first latch, and the movable body is fixed to the fire door by the second latch. Then, when the doorknob is rotated, the second latch is released and at the same time the first latch is released. When the second latch is released, the movable body opens and the pressure difference between the front and back of the fire door is eliminated. Also, since the first latch is released, the fire door can be opened.

However, in the above configuration, both the first latch and the second latch are released at the same time by the rotation operation of the door knob to open the movable body, so that the fire door can be used as an open door in a normal time other than a fire. Is unsuitable.

Japanese Unexamined Patent Publication No. 7-259407

The present invention can be used as a normal hinged door that opens the entire door when no differential pressure is generated or when the differential pressure is small, and when a large differential pressure is generated, the entire differential pressure is eliminated and then the entire door is opened. The challenge is to provide a hinged door that can be opened.

The hinged door according to the present invention has a door body rotatably supported by the door frame, a differential pressure door rotatably supported by the door body for eliminating differential pressure, and a hinged door fixed to the door frame. The first latch for fixing the differential pressure door to the door body, the door knob to be rotated, and the rotation of the door knob to the first latch and the second latch. It is equipped with a transmission mechanism that transmits and releases the first latch and the second latch, and the transmission mechanism keeps the second latch in a fixed state when the doorknob is first operated to release the first latch. When released and the doorknob is second operated, both the first latch and the second latch are released.

According to the hinged door of this configuration, the first operation of the doorknob releases the first latch while keeping the second latch in a fixed state. Therefore, in the normal time when the differential pressure is not generated or the differential pressure is small, the entire open door can be opened with the differential pressure door fixed to the door body by the first operation of the door knob. On the other hand, when a large differential pressure is generated such as in a fire, both the first latch and the second latch can be released by the second operation of the doorknob. Therefore, by the second operation of the door knob, the pressure difference between the front and rear of the hinged door can be eliminated by opening the differential pressure door with respect to the door body, and the entire hinged door can be opened after the pressure is eliminated. When a large differential pressure is generated, for example, a fire may occur or the room may be forcibly exhausted by a ventilation fan or the like. Hereinafter, the normal time when no differential pressure is generated or the differential pressure is small is simply referred to as a normal time, and the time when a large differential pressure is generated is simply referred to as a differential pressure generation time.

In particular, the first operation is an operation of rotating the doorknob in a predetermined direction to a first angle, and the second operation is an operation of rotating the doorknob in the predetermined direction to a second angle exceeding the first angle. It is preferable that the operation is to make the operation. According to the configuration, since the first operation and the second operation have the same rotation direction and the first operation and the second operation differ in the magnitude of the rotation angle, the operation of the doorknob is distinguished. Is easy. Further, since it is usually sufficient to operate the doorknob with a small rotation angle, the doorknob can be easily operated and the door can be easily opened.

Further, it is provided with a load applying portion that does not apply a rotational load to the doorknob in the first section up to the first angle but applies a rotational load to the doorknob in the second section from the first angle to the second angle. Is preferable. According to this configuration, the rotational load of the doorknob increases stepwise at the stage of transition from the first section to the second section. Therefore, in the normal state, only the first latch can be released by rotating the doorknob to the first angle without rotating it to the second section.

Further, the transmission mechanism has a first drive shaft for sliding the first latch to the immersive side, a second drive shaft for sliding the second latch to the immersive side, and the rotation of the doorknob. It is equipped with a control rotary for transmission to the first and second drive shafts, the second drive shaft is located on the main shaft located on the control rotary side and on the second latch side and relative to the main shaft. Equipped with a movable sub-shaft, the sub-shaft is urged to the second latch side, and when the doorknob is operated second, the control rotary moves the sub-shaft via the main shaft to the second. When the latch is released and the second latch abuts on the door body and moves to the immersive side when the opened differential pressure door closes, the main shaft does not move and the sub-shaft moves relative to the main shaft. It is preferable to do so. Immediately before the differential pressure door closes, the sub-shaft moves to the immersion side of the second latch, while the main shaft does not move, so that the door knob does not rotate.

As described above, since the second latch is not released and the differential pressure door is not opened by the first operation of the door knob, it can be used as a general open door that opens the whole in a normal time.

It is a front view including a partial break line which shows the open door in one Embodiment of this invention, and shows the state which the open door is closed. A plan view including a partial cross section of the same hinged door. It is a plan view including a partial cross section of the same opening door, and shows the state which the differential pressure door is opened. An enlarged plan view of a main part of FIG. FIG. 4A is a cross-sectional view taken along the line AA of FIG. BB sectional view of FIG. FIG. 4 is an enlarged plan view of a main part corresponding to FIG. 4, showing a state in which the first latch is released. FIG. 4 is an enlarged plan view of a main part corresponding to FIG. 4, showing a state in which the second latch is released. FIG. 4 is an enlarged plan view of a main part corresponding to FIG. 4, showing a state immediately before the door body and the differential pressure door are closed. 7 is a view showing a state corresponding to FIG. 7, in which FIG. 7A is an enlarged plan view of a main part and FIG. 7B is an enlarged front view of a main part. 8 is a view showing a state corresponding to FIG. 8, in which FIG. 8A is an enlarged plan view of a main part and FIG. 8B is an enlarged front view of a main part. 9 is a view showing a state corresponding to FIG. 9, in which FIG. 9A is an enlarged plan view of a main part and FIG. 9B is an enlarged front view of a main part.

Hereinafter, the hinged door 1 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 12. 1 to 3 show the overall structure of the hinged door 1 according to the present embodiment. The hinged door 1 can be used as a fire door, or can be used as a front door or the like that separates the indoor and outdoor areas at the entrance of a condominium. The hinged door 1 rotates around an axis in the vertical direction to open and close a passage which is an opening. The opening direction (left-right hand) of the hinged door 1 may be left or right, but this embodiment is a left-handed specification. The passage is partitioned by the door frame 2, and the base end portion of the open door 1 is rotatably supported by the door frame 2 via the upper and lower hinges 3. Therefore, the rotation axis 1a of the hinged door 1 is located at the base end portion of the hinged door 1. The base end portion of the hinged door 1 is the end portion of the hinged door 1 on the side close to the rotation axis 1a, and the tip end portion of the hinged door 1 is on the opposite side of the proximal end portion. It is an end portion on the side far from the rotation axis 1a of. Hereinafter, the tip end side of the hinged door 1 is simply referred to as the door tip end side, and the proximal end side of the hinged door 1 is simply referred to as the door proximal end side.

The hinged door 1 includes a door main body 4 that occupies most of the area of the hinged door 1, and a differential pressure door 5 for eliminating the differential pressure, which is configured separately from the door main body 4. The door body 4 is supported by the door frame 2 via a hinge 3 and is urged to the closed side by a door closer (not shown). The differential pressure door 5 is rotatably supported by the door body 4. The differential pressure door 5 is located on the door tip side of the door body 4. An opening for eliminating the differential pressure is formed between the end of the door body 4 on the door tip side and the door frame 2, and the differential pressure door 5 eliminates the differential pressure. Close the opening for. The shape and size of the opening for eliminating the differential pressure is arbitrary, but in the present embodiment, it is formed over the entire length of the passage in the vertical direction. Therefore, the passage is divided into two parts, left and right, and in FIG. 1, the left side portion of the passage is closed by the differential pressure door 5, and the right portion of the passage is closed by the door body 4. Further, the hinged door 1 is divided into two left and right, the area on the door tip side is composed of the differential pressure door 5, and the area on the door base end side is composed of the door main body 4. The rotation axis of the door body 4 is the rotation axis 1a of the hinged door 1.

The differential pressure door 5 rotates around an axis in the vertical direction. The rotation axis 5a of the differential pressure door 5 is along the vertical direction, and the rotation axis 5a of the differential pressure door 5 and the rotation axis 1a of the hinged door 1 are parallel to each other. The rotation axis 5a of the differential pressure door 5 is located at a substantially central portion in the left-right direction of the differential pressure door 5. The differential pressure door 5 is supported by the door body 4 at both upper and lower ends thereof. The differential pressure door 5 is urged to the closed side by the hinge closer 6. FIG. 2 shows a state in which the differential pressure door 5 is closed, and the door body 4 and the differential pressure door 5 are in a straight line. FIG. 3 shows a state in which the differential pressure door 5 is opened, and the differential pressure door 5 is opened by rotating counterclockwise in a plan view from the fully closed state. Similarly to the differential pressure door 5, the door body 4 also rotates counterclockwise in a plan view from the fully closed state to open. Therefore, the door body 4 and the differential pressure door 5 are opened in the same direction. In FIG. 1, the door body 4 is pulled toward the front side to open, and the differential pressure door 5 is also pulled toward the front side to open.

The hinged door 1 has a first latch 11 for fixing the entire hinged door 1 to the door frame 2, a second latch 12 for fixing the differential pressure door 5 to the door body 4, and a first latch. The door knob 13 which is rotated to release the 11 and the second latch 12, and the rotation of the door knob 13 is transmitted to the first latch 11 and the second latch 12 to transmit the rotation of the door knob 13 to the first latch 11 and the second latch 12. It is provided with a transmission mechanism for releasing the latch 12. The first latch 11 is provided at the tip end portion of the hinged door 1 and can slide along the left-right direction (horizontal direction). The first engaging recess 14 with which the first latch 11 engages is provided in the door frame 2, specifically, in the vertical frame of the door frame 2 facing the tip end portion of the hinged door 1. ing. As shown in the enlarged view in FIG. 4, the first latch 11 is urged toward the protruding side (door tip side) by the first coil spring 15. The first latch 11 is usually urged by the first coil spring 15 and is in a protruding state protruding from the open door 1. When the first latch 11 hits the door frame 2 and is pushed, the first latch 11 immerses itself in the opening door 1 against the urging force of the first coil spring 15. Since the area on the door tip side of the hinged door 1 is formed by the differential pressure door 5, the first latch 11 is provided on the differential pressure door 5. The first latch 11 is provided at the end of the differential pressure door 5 on the door tip side.

The second latch 12 is provided at the end of the differential pressure door 5 on the door base end side. That is, the second latch 12 is located on the opposite side of the first latch 11. The second latch 12 is slidable along the left-right direction (horizontal direction) like the first latch 11. As shown in FIG. 10, the second engaging recess 16 with which the second latch 12 engages is provided at the end of the door body 4 on the door tip side. Further, the second latch 12 is urged toward the protruding side (door base end side) by the second coil spring 17 shown in FIG. The second latch 12 is normally urged by the second coil spring 17 and is in a protruding state protruding from the differential pressure door 5. When the second latch 12 hits the door body 4 and is pushed, the second latch 12 immerses itself inside the differential pressure door 5 against the urging force of the second coil spring 17. The urging direction of the second latch 12 by the second coil spring 17 is opposite to the urging direction of the first latch 11 by the first coil spring 15. The first latch 11 and the second latch 12 may be located on the same line with each other in the front view, but in the present embodiment, they are not on the same line but are displaced vertically from each other, so that the first latch 11 and the second latch 12 may be located on the same line. The latch 11 is located on the upper side and the second latch 12 is located on the lower side.

The door knob 13 is provided at the tip end portion of the hinged door 1, and specifically, is provided at the differential pressure door 5. The doorknob 13 can be rotated around an axis in the front-rear direction. Specifically, in the front view shown in FIGS. 1 and 4, the doorknob 13 is rotated clockwise, and the first latch 11 is released by the clockwise rotation operation, and the second latch 11 is released. The latch 12 is released. As shown in FIGS. 4 to 6, the doorknob 13 includes a pair of front and rear handle portions 20 that are rotated around a rotation axis 13a in the front-rear direction. The handle portion 20 has a shaft portion 20a extending along the direction of the rotation axis 13a of the door knob 13 and an arm portion extending in the radial direction from the tip end portion of the shaft portion 20a in a direction orthogonal to the rotation axis 13a. It has 20b. The handle portion 20 has a basic position in which the arm portion 20b is in a substantially horizontal state as shown in FIG. 4, and the basic position is referred to as a 0 degree position. The handle portion 20 rotates clockwise from the 0 degree position in the front view. The doorknob 13 is urged counterclockwise when viewed from the front by a torsion coil spring 21. However, the doorknob 13 is restricted from rotating counterclockwise from the 0 degree position, and cannot be rotated counterclockwise from the 0 degree position.

The transmission mechanism releases the first latch 11 by transmitting the rotation of the doorknob 13 to the first latch 11 or the second latch 12, and also causes the second latch 12 to be released. To release it. The transmission mechanism selectively transmits the rotation of the doorknob 13 to the first latch 11 and the second latch 12. That is, the transmission mechanism transmits the rotation of the doorknob 13 only to the first latch 11 without transmitting it to the second latch 12, and the rotation of the doorknob 13 is transmitted to the first latch 11 and the second latch 11. There is a state of transmitting to both of the latch 12.

The transmission mechanism includes a first drive shaft 31 for sliding the first latch 11 to the immersive side, a second drive shaft 32 for sliding the second latch 12 to the immersive side, and a rotation of the doorknob 13. It is equipped with a control rotary that transmits motion to the first and second drive shafts 31 and 32 to move the first and second drive shafts 31 and 32 in the direction of their respective center lines. The first drive shaft 31 extends from the first latch 11 toward the immersion side of the first latch 11. The first drive shaft 31 is slidable along the direction of its center line. The first drive shaft 31 is located above the rotation axis 13a of the doorknob 13. When the open door 1 is closed as shown in FIG. 4, the first latch 11 is in a fixed state, and in that state, the end portion of the first drive shaft 31 on the door base end side rotates the door knob 13. It is located slightly closer to the tip of the door with respect to the axis 13a. The first latch 11 is attached to the end of the first drive shaft 31 on the door tip side, and the first latch 11 slides integrally with the first drive shaft 31. A first fixing plate 33 is provided inside the differential pressure door 5. The first fixing plate 33 is located on the door tip side of the rotation axis 13a of the door knob 13. The first drive shaft 31 horizontally penetrates the first fixing plate 33. A first coil spring 15 for urging the first latch 11 to the protruding side is provided between the first latch 11 and the first fixing plate 33, and the first coil spring 15 is used as the first coil spring 15. The drive shaft 31 is inserted. The end of the first drive shaft 31 on the door base end side is located on the opposite side of the first fixing plate 33 from the first latch 11. That is, the end of the first drive shaft 31 on the door tip side is located on the door tip side with respect to the first fixing plate 33, and the end of the first drive shaft 31 on the door base end side is the first. It is located on the door base end side with respect to one fixing plate 33. A flange portion 31a is provided at the end of the first drive shaft 31 on the door base end side.

The second drive shaft 32 extends from the second latch 12 toward the immersion side of the second latch 12. The second drive shaft 32 is slidable along the direction of its center line. The second drive shaft 32 is located below the first drive shaft 31, and is located below the rotation axis 13a of the doorknob 13. Therefore, the second drive shaft 32 is located on the side opposite to the first drive shaft 31 with respect to the rotation axis 13a of the doorknob 13. The second drive shaft 32 is parallel to the first drive shaft 31. The second drive shaft 32 is composed of two shafts that are separate from each other. That is, the second drive shaft 32 is composed of a main shaft 34 located on the control rotary side and a sub-shaft 35 located on the second latch 12 side. The sub-shaft 35 can move relative to the main shaft 34 along the direction of the center line. The main shaft 34 is located on the door tip side with respect to the sub shaft 35. The main shaft 34 and the sub shaft 35 are located in a straight line. The main shaft 34 is located directly below the rotation axis 13a of the doorknob 13, and the sub-shaft 35 is located away from the rotation axis 13a of the doorknob 13 toward the door base end side. The end of the sub-shaft 35 on the door tip side is joined to the end of the main shaft 34 on the door base end side so as to be relatively slidable within a predetermined length range. Specifically, at the end of the main shaft 34 on the door base end side, a slide hole 36 is formed along the direction of the center line of the main shaft 34, and a first engaging pin 37 is provided. ing. The end of the sub-shaft 35 on the door tip side is engaged in the slide hole 36 of the main shaft 34. Further, at the end of the sub-shaft 35 on the door tip side, a long first elongated hole 38 is formed along the direction of the center line of the sub-shaft 35, and the first elongated hole 38 is first engaged. The mating pin 37 is engaged. Therefore, the sub-shaft 35 can slide relative to the main shaft 34 by a distance corresponding to the length of the first long hole 38, and the second drive shaft 32 has a length corresponding to the first long hole 38. It can be expanded and contracted by that amount.

A second latch 12 is attached to the end of the sub-shaft 35 on the door base end side, and the second latch 12 slides horizontally together with the sub-shaft 35. A spring holding plate 39 is attached in the vicinity of the end portion of the sub-shaft 35 on the door tip side. A second fixing plate 40 is provided inside the differential pressure door 5, and the main shaft 34 penetrates the second fixing plate 40. Between the spring holding plate 39 and the second fixing plate 40, for urging the sub-shaft 35 toward the door base end side, that is, for urging the sub-shaft 35 in a direction away from the main shaft 34. A second coil spring 17 is arranged. A second coil spring 17 is inserted through the main shaft 34 and the sub shaft 35. Due to the urging force of the second coil spring 17, the second drive shaft 32 is usually in the most stretched state.

A third fixing plate 41 is provided inside the differential pressure door 5. The third fixing plate 41 is located away from the second fixing plate 40 on the door tip side. The main shaft 34 penetrates the third fixing plate 41, and the end portion of the main shaft 34 on the door tip side is located closer to the door tip side than the third fixing plate 41. A stopper 42 is provided at the end of the main shaft 34 on the door tip side, and when the stopper 42 hits the third fixing plate 41, the main shaft 34 cannot move further to the door base end side. A step portion 43 is formed in the vicinity of the central portion of the main shaft 34, and a third coil spring 44 is arranged between the step portion 43 and the third fixing plate 41. The main shaft 34 is inserted with a third coil spring 44. The third coil spring 44 urges the main shaft 34 toward the door base end side. The third coil spring 44 is a spring having a wire diameter thicker and stronger than the second coil spring 17, and a spring having a wire diameter thicker and stronger than the first coil spring 15. A second elongated hole 45 penetrating in the front-rear direction is formed at a position in the center of the main shaft 34 between the step portion 43 and the slide hole 36. The second elongated hole 45 has a shape that is orthogonal to the direction of the center line of the main shaft 34 and is long in the vertical direction. A second engaging pin 46 is engaged with the second elongated hole 45. The second engaging pin 46 penetrates the main shaft 34 in the front-rear direction, and both front and rear ends thereof project to the outside of the main shaft 34, respectively.

As shown in FIG. 5, the doorknob 13 includes a connecting shaft 22 that connects a pair of front and rear handle portions 20 to the front and rear. The connecting shaft 22 is located on the rotation axis 13a of the doorknob 13. The connecting shaft 22 penetrates the differential pressure door 5 in the front-rear direction. A pair of front and rear control plates 51 as a control rotary are attached to the central portion of the connecting shaft 22. The front and rear control plates 51 rotate integrally with the connecting shaft 22. As shown in FIGS. 5 and 6, the front and rear control plates 51 are arranged in parallel so as to be separated from each other in the front-rear direction. Since the front and rear control plates 51 have the same shape as each other, and FIGS. 4 and 7 to 9 are cross-sectional views cut at positions between the front and rear control plates 51, only the rear control plate 51 is shown. Has been done.

The control plate 51 includes a first drive unit 52 for sliding the first drive shaft 31 toward the door base end side, and a second drive unit 53 for sliding the second drive shaft 32 toward the door tip end side. I have. The first drive unit 52 and the second drive unit 53 are respectively projected radially outward from the rotation axis 13a of the doorknob 13. When the handle portion 20 is in a substantially horizontal state, the first drive portion 52 is located above the control plate 51, and the second drive portion 53 is located below the control plate 51. The first drive unit 52 is in contact with the flange portion 31a of the first drive shaft 31 from the door tip side. Then, as the door knob 13 rotates clockwise in the front view, the first drive unit 52 pushes the flange portion 31a of the first drive shaft 31 toward the door tip side, and the first drive shaft 31 pushes the first drive shaft 31 toward the door tip side. Move to. A third elongated hole 54 is formed in the second drive unit 53. The third elongated hole 54 has an arc shape centered on the rotation axis 13a of the doorknob 13. The end of the second engaging pin 46 is engaged with the third elongated hole 54. A torsion coil spring 21 is arranged between the front and rear control plates 51. When the door knob 13 is in the 0 degree position as shown in FIG. 4, the first drive unit 52 is in contact with the first fixing plate 33 from the door base end side, and the front surface of the control plate 51 is provided by the first fixing plate 33. The counterclockwise rotation is restricted. The first drive shaft 31 and the second drive shaft 32 are located between the front and rear control plates 51.

Next, the rotation operation of the door knob 13 and the operation of the first latch 11 and the second latch 12 will be described. FIG. 4 shows the state where the doorknob 13 is in the 0 degree position, FIG. 7 shows the state when the doorknob 13 is rotated to the first angle, and FIG. 8 shows the state when the doorknob 13 is rotated to the second angle. It shows the state when it is rotated. Both the first angle and the second angle may be set arbitrarily, but for example, the first angle is 30 degrees and the second angle is 60 degrees. The section from the 0 degree position to the first angle is the first section, and the section from the first angle to the second angle is the second section.

When the open door 1 is closed as shown in FIG. 4, the door knob 13 is in the 0 degree position. At the 0 degree position, the first latch 11 is in a protruding state protruding from the end of the differential pressure door 5 on the door tip side, is engaged with the first engaging recess 14, and is in a fixed state, and is a hinged door. 1 is fixed to the door frame 2 and maintains a closed state. Further, at the 0 degree position, as shown in FIG. 10, the second latch 12 is in a protruding state protruding from the end of the differential pressure door 5 on the door base end side and engages with the second engaging recess 16. The differential pressure door 5 is fixed to the door body 4 and maintains a closed state. The second engaging pin 46 is located at the first end in the circumferential direction of the third elongated hole 54.

When the door knob 13 is rotated clockwise from the 0 degree position shown in FIG. 4, the first drive unit 52 moves the first drive shaft 31 toward the door base end side in accordance with the rotation operation. .. The first coil spring 15 is compressed by moving the first drive shaft 31 toward the door base end side. On the other hand, as the second drive unit 53 rotates clockwise in the front view, the second engagement pin 46 moves the third elongated hole 54 from the first end portion in the circumferential direction to the second end portion. And move relatively. Since the second engaging pin 46 moves through the third elongated hole 54 in this way, even if the doorknob 13 is rotated, the second drive shaft 32 does not move, and the second latch 12 is in a fixed state. Is maintained at. When the doorknob 13 is rotated to the first angle, the second engaging pin 46 comes into contact with the second end in the circumferential direction of the third elongated hole 54. Therefore, the central angle of the third elongated hole 54 is an angle corresponding to the first section. When the door knob 13 is rotated clockwise in the front view, the twist angle of the twist coil spring 21 increases accordingly, and the control plate 51 is urged even more strongly in the counterclockwise direction in the front view.

Then, when the door knob 13 is rotated to the first angle as shown in FIG. 7, the first latch 11 comes out of the first engaging recess 14 and is in the released state, and is retracted inside the differential pressure door 5. It becomes an immersive state. By rotating the door knob 13 to the first angle, the first latch 11 is released, so that the hinged door 1 can be opened. On the other hand, even if the door knob 13 is rotated to the first angle, the second latch 12 is maintained in the fixed state, and the differential pressure door 5 remains fixed to the door body 4 and the differential pressure is maintained. The door 5 cannot be opened with respect to the door body 4.

When the door knob 13 is further rotated clockwise from the first angle in FIG. 7, the first drive unit 52 further moves the first drive shaft 31 toward the door base end side, and the first coil spring 15 is Further compress. On the other hand, the second drive unit 53 pushes the second engagement pin 46 toward the door tip side. The second engaging pin 46 moves upward through the second elongated hole 45 while being pushed toward the door tip side by the second drive unit 53. Further, when the second engaging pin 46 is pushed toward the door tip side by the second drive unit 53, the main shaft 34 moves toward the door tip side. As the main shaft 34 moves toward the tip of the door, the third coil spring 44 starts compression. When the third coil spring 44 starts to compress, a new rotational load is generated on the doorknob 13. That is, the third coil spring 44 does not apply a rotational load to the doorknob 13 in the first section, but applies a rotational load to the doorknob 13 in the second section.

When the main shaft 34 moves to the door tip side, the movement of the main shaft 34 is transmitted to the sub shaft 35 via the first engaging pin 37, and the sub shaft 35 is also brought to the door tip side by the main shaft 34. Moving. That is, the main shaft 34 and the sub shaft 35 move together to the door tip side. Therefore, the second latch 12 moves in the direction of coming out of the second engaging recess 16. As the sub-shaft 35 moves toward the tip of the door, the second coil spring 17 starts compression. When the second coil spring 17 starts to compress, a new rotational load is generated on the doorknob 13. That is, the second coil spring 17 also applies a rotational load to the doorknob 13 in the second section together with the third coil spring 44. In the present embodiment, the second coil spring 17 and the third coil spring 44 are load applying portions that do not apply a rotational load to the doorknob 13 in the first section but apply a rotational load to the doorknob 13 in the second section.

Then, when the door knob 13 is rotated to the second angle as shown in FIG. 8, the second latch 12 comes out of the second engaging recess 16 and is released from the second engaging recess 16 as shown in FIG. 11, and the differential pressure door 5 is released. It becomes an immersive state that has entered so as to evacuate to the inside. When the doorknob 13 is rotated to the second angle, the second engaging pin 46 is located at the upper end of the second elongated hole 45, and the second drive portion 53 abuts on the screw boss 23. Therefore, the doorknob 13 cannot be rotated clockwise beyond the second angle. When the door knob 13 is rotated to the second angle, the second latch 12 is released, but since the first latch 11 has already been released, only the differential pressure door 5 is opened as shown in FIG. be able to. Therefore, when the differential pressure is generated, the pressure difference between the front and rear of the hinged door 1 can be eliminated by opening only the differential pressure door 5.

After the pressure difference is eliminated, the entire door 1 including the door body 4 can be opened so that a person can pass through. Immediately after releasing the doorknob 13, the doorknob 13 returns to its original 0 degree position as shown in FIG. 4, and the first drive shaft 31 and the second drive shaft 32 return to their original initial positions as shown in FIG. Returning, the first latch 11 and the second latch 12 return to the protruding state. Then, the door body 4 is automatically rotated to the closed side by a door closer (not shown), and the differential pressure door 5 is automatically rotated to the closed side by a hinge closer 6.

9 and 12 show a state immediately before the hinged door 1 is fully closed with respect to the door frame 2 and immediately before the differential pressure door 5 is fully closed with respect to the door body 4. .. As shown in FIG. 9, the first latch 11 hits the door frame 2 and is pushed by the door frame 2 to enter the inside of the differential pressure door 5. As the first latch 11 moves toward the door base end side, the first drive shaft 31 also moves toward the door base end side. On the other hand, the first drive unit 52 of the control plate 51 maintains a state of being in contact with the first fixed plate 33 by the urging force of the torsion coil spring 21. Therefore, the flange portion 31a of the first drive shaft 31 is separated from the first drive portion 52 of the control plate 51 toward the door tip side.

As shown in FIG. 12, when the second latch 12 hits the door body 4, it is pushed by the door body 4 and enters the inside of the differential pressure door 5. Along with the movement of the second latch 12 toward the door tip side, the sub-shaft 35 of the second drive shaft 32 also moves toward the door tip side. As shown in FIG. 9, the sub-shaft 35 moves toward the door tip side while compressing the second coil spring 17, but the main shaft 34 does not move and is kept in the initial position. That is, the second drive shaft 32 is in a compressed state with a short length. Since the main shaft 34 does not move to the door tip side, the door knob 13 does not rotate and maintains the 0 degree position.

As described above, in the hinged door 1 of the present embodiment, only the first latch 11 can be released by rotating the doorknob 13 within an angle range that does not exceed the first angle. Therefore, the hinged door 1 is normally released. Can be used as a general hinged door that opens and closes as a whole. Further, since the first latch 11 can be released by the rotation operation in a small angle range, the opening door 1 can be easily and easily opened. Further, when the doorknob 13 enters the second section, the second coil spring 17 and the third coil spring 44 as the load applying portion start compression, so that when the doorknob 13 shifts from the first section to the second section, the doorknob 13 The rotational load increases in steps. Therefore, when the doorknob 13 is rotated to the first angle, the second coil spring 17 and the third coil spring 44 function as a kind of stopper, and the doorknob 13 is the first hand to operate the doorknob 13. The fact that the angle has been reached is transmitted as a tactile sensation. Therefore, the doorknob 13 can be easily rotated within the first section in a normal state. In particular, a third coil spring 44 is provided separately from the second coil spring 17, and the third coil spring 44 is stronger than the second coil spring 17, so that the first section and the second section There is a large difference in the rotational load of the doorknob 13 between them. Moreover, since the second coil spring 17 is weaker than the third coil spring 44, only the second coil spring 17 is compressed immediately before the differential pressure door 5 is closed, and the second latch 12 is surely immersed. Become. Therefore, the second latch 12 surely returns to the fixed state, and the differential pressure door 5 surely returns to the closed state.

Since the second drive shaft 32 is composed of two shafts, the main shaft 34 and the sub shaft 35, only the sub shaft 35 moves immediately before the differential pressure door 5 is fully closed. If the second drive shaft 32 is composed of one shaft, the entire second drive shaft 32 moves to the door tip side immediately before the differential pressure door 5 is fully closed. The control plate 51 connected to the second drive shaft 32 via the engaging pin 46 of the door knob 13 also rotates clockwise in the front view. Moreover, in that case, since the third coil spring 44 is compressed, it is necessary to make the third coil spring 44 weak, but if the third coil spring 44 is made weak, the section changes from the first section to the second section. The step of the rotational load at the time of transition becomes small, and the stopper function of the third coil spring 44 for preventing the transition to the second section in the normal rotation operation of the doorknob 13 weakens.

In the present embodiment, the entire vertical direction of the tip of the hinged door 1 is composed of the differential pressure door 5, but a notch is formed at the end of the door body 4 on the door tip side, and the notch is formed. By arranging the differential pressure door 5 in the portion, a part of the tip portion of the hinged door 1 may be configured by the differential pressure door 5, and the rest may be configured by the door main body 4. In that case, the first latch 11 and the door knob 13 may be provided on the door body 4 instead of the differential pressure door 5.

Further, the arrangement of the second latch 12 is also arbitrary, and in the above-described embodiment, the second latch 12 is arranged at the end portion of the differential pressure door 5 on the door base end side, but the notch portion is provided in the door body 4 as described above. In this case, it may be arranged at the upper end portion or the lower end portion of the differential pressure door 5. When the second latch 12 is arranged at the upper end and the lower end of the differential pressure door 5 in this way, the second drive shaft 32 also extends in the vertical direction, and the first drive shaft 31 and the second drive shaft 32 also extend. The second drive shaft 32 will be, for example, orthogonal to each other rather than parallel to each other.

The configuration of the second drive unit 53 of the control plate 51 can also be changed in various ways. In the above embodiment, the second drive unit 53 is connected to the second drive shaft 32 by the second engagement pin 46. The second drive unit 53 may also be configured to push the second drive shaft 32 from the door base end side in the same manner as the first drive unit 52. In that case, when the second drive unit 53 is in a state of being separated in the counterclockwise direction in the front view without contacting the second drive shaft 32 in the first section, and the door knob 13 is at the first angle. It can be configured to abut on the second drive shaft 32 from the door base end side and push the second drive shaft 32 toward the door tip side to move it.

The configuration of the control rotary can also be changed in various ways. In the above embodiment, the control rotary is provided with a pair of front and rear control plates 51, but the control rotary may be configured from one member.

The configuration of the transmission mechanism can also be changed in various ways. In the above embodiment, the first operation of the doorknob 13 is an operation of rotating the doorknob 13 to the first angle, and the second operation of the doorknob 13 is the operation of rotating the doorknob 13 to the second angle. Although it was an operation of rotating up to, the first operation and the second operation may be rotation operations in opposite directions, and the first operation and the second operation may be various operations.

1 Open door 1a Rotating axis 2 Door frame 3 Hinge 4 Door body 5 Differential pressure door 5a Rotating axis 6 Hinge closer 11 First latch 12 Second latch 13 Door knob 13a Rotating axis 14 First engaging recess 15 1st coil spring 16 2nd engaging recess 17 2nd coil spring 20 Handle part 20a Shaft part 20b Arm part 21 Twisting coil spring 22 Connecting shaft 23 Screw boss 31 First drive shaft (transmission mechanism)
31a Flange 32 Second drive shaft (transmission mechanism)
33 First fixing plate 34 Main shaft 35 Sub-shaft 36 Slide hole 37 First engaging pin 38 First long hole 39 Spring holding plate 40 Second fixing plate 41 Third fixing plate 42 Stopper 43 Step portion 44 Third coil spring 45 Second slot 46 Second engagement pin 51 Control plate (transmission mechanism, control rotary)
52 First drive unit 53 Second drive unit 54 Third elongated hole

Claims (4)

A door body rotatably supported by the door frame, a differential pressure door rotatably supported by the door body for eliminating the differential pressure, and a first latch for fixing the hinged door to the door frame. , The second latch for fixing the differential pressure door to the door body, the door knob to be rotated, and the first latch by transmitting the rotation of the door knob to the first latch and the second latch. Equipped with a transmission mechanism to release the second latch,
The transmission mechanism keeps the second latch fixed and releases the first latch when the doorknob is first operated, and the first latch and the second latch when the doorknob is second operated. Release both of
The transmission mechanism includes a main shaft and a sub-shaft for sliding the second latch to the immersion side.
The sub-shaft is located on the second latch side with respect to the main shaft and is urged to the second latch side so that it can move relative to the main shaft.
When the doorknob is operated second, the transmission mechanism moves the sub-shaft via the main shaft to release the second latch.
An open door in which the main shaft does not move and the sub-shaft moves relative to the main shaft when the second latch abuts on the door body and moves to the immersive side when the open differential pressure door closes . The first operation is an operation of rotating the doorknob in a predetermined direction to a first angle, and the second operation is an operation of rotating the doorknob in the predetermined direction to a second angle exceeding the first angle. The hinged door according to claim 1. Claimed to include a load applying portion that does not apply a rotational load to the doorknob in the first section up to the first angle but applies a rotational load to the doorknob in the second section from the first angle to the second angle. 2 The hinged door described. The transmission mechanism includes a control rotary that transmits the rotation of the doorknob to the main shaft , and when the doorknob is second operated, the control rotary moves the subshaft via the main shaft to the second. The hinged door according to any one of claims 1 to 3 for releasing the latch.

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