JP7777478B2 - Entrance door device - Google Patents

Description

This disclosure relates to an entrance door device.

Conventionally, door devices have been known in which a door body is attached to a frame body by a hinge so that it can be opened and closed (see, for example, Patent Document 1). This door device is configured to open and close using a pin that passes vertically through a hinge member on the frame body and a hinge member on the door body, with the pin acting as the pivot point. A slight clearance is provided between the pin and the through-hole in the hinge member on the frame body where the pin is placed, so that the door device can be opened and closed using the pin as the pivot point.

Japanese Patent Application Laid-Open No. 2005-336851

The above door device is for indoor use and is not equipped with a door closer (door opening/closing control mechanism) that controls the movement speed of the door body. If this door device is applied to, for example, a front door equipped with a door closer, when the door body is opened or closed, the door closer exerts a pulling force on the door body. Therefore, when the door body is opened or closed in a sudden reverse motion, the slight clearance between the pin and the through-hole in the frame-side hinge member can cause the pin to suddenly move toward the interior or exterior of the room, causing the frame-side hinge member to move left and right, front and back. Therefore, there is a need for a front door device that can suppress movement of the hinge in all directions, left and right, front and back, when the door body is opened or closed.

The purpose of this disclosure is to provide an entrance door device that can suppress movement of the hinge in all directions, including left and right, front and back.

The present disclosure relates to an entrance door apparatus comprising a frame and a door body attached to the frame body via a hinge so as to be able to open and close, the hinge comprising: a frame-side hinge member fixed to the frame body and having a frame-side cylindrical portion extending in the vertical direction; a door-side hinge member fixed to the door body and positioned above the frame-side hinge member, the door-side cylindrical portion extending in the vertical direction and a notch formed by cutting the door-side cylindrical portion circumferentially midway up and down; a shaft member that axially passes through the door-side cylindrical portion of the door-side hinge member and has a lower end portion positioned inside the frame-side cylindrical portion of the frame-side hinge member; and a ring member that is positioned in the notch and has a locking portion that locks onto the door-side hinge member.

FIG. 2 is a front view of the entrance door device as seen from the outside of the room. 1 is an exploded perspective view of a door body and a frame body in an entrance door device. FIG. FIG. 2 is a partially exploded perspective view of the upper hinge of the entrance door device, viewed from one side. 1 is a partially exploded perspective view of the upper hinge of the entrance door device as seen from the other side. FIG. FIG. 2 is an exploded perspective view of the upper hinge in the entrance door device. FIG. 2 is a vertical cross-sectional view showing an upper hinge in the entrance door device. 7 is a cross-sectional view taken along line AA in FIG. 6. 7 is a cross-sectional view taken along line BB in FIG. 6. 7 is a cross-sectional view taken along line CC in FIG. 6. 10A and 10B are diagrams showing the operation of hanging the door body in the entrance door device.

Embodiments of the entrance door device of the present disclosure will be described in detail below with reference to the drawings. As shown in Figure 1, the entrance door device 1 comprises a frame body 2 installed at an opening in a building frame, and a door body 3 attached to the inside of the frame body 2 via multiple hinges 4, 5 so as to be able to open and close.

The frame body 2 is formed by framing an upper frame 21, a lower frame 22, and left and right vertical frames 23, 24 in a rectangular shape. The lower frame 22 of the frame body 2 is not necessarily provided. The entrance door device 1 of this embodiment is an outward-opening door device in which the door body 3 opens toward the outside of the room relative to the frame body 2. The X direction shown in the following diagrams indicates the outside side of the entrance door device 1.

The door body 3 is attached to the vertical frame 24 of the frame body 2 so that it can be opened and closed via at least two hinges 4, 5 arranged at a predetermined interval in the vertical direction on the hanging side. The entrance door device 1 of this embodiment has three hinges: two top hinges 4, 4 arranged at the top and middle positions in the vertical direction, and one bottom hinge 5 arranged at the bottom. The entrance door device 1 of the present disclosure is characterized by the top hinges 4, 4. The two top hinges 4, 4 have the same configuration.

A door closer 31 (door opening/closing control mechanism) is provided at the upper end of the door body 3 on the hanging side. The link portion of the door closer 31 is connected to the upper frame 21 of the frame body 2. The door closer 31 controls the movement speed of the door body 3. The door closer 31 has a built-in deceleration device (not shown) that applies a force to move the door body 3 from the open position to the closed position, and the opened door body 3 is automatically moved to the closed position by the door closer 31. The door closer 31 is also configured to adjust the force it applies depending on the position of the door body 3, and the door closer 31 prevents the door body 3 from moving suddenly to the closed position.

First, referring to Figure 2, an overview of the top hinge 4 and bottom hinge 5 will be described. The top hinge 4 is composed of a frame-side hinge member 41 fixed to the inner surface 24a of the vertical frame 24, and a door body-side hinge member 42 fixed to the outer surface 3a of the door body 3 on the hanging side. The frame-side hinge member 41 and the door body-side hinge member 42 are formed from metal plates. The door body-side hinge member 42 is positioned above the frame-side hinge member 41. The door body-side hinge member 42 is connected to the frame-side hinge member 41 so that it can be opened and closed by a shaft member 43 that penetrates the cylindrical portion 422. A shaft cover 44 is attached to the door body-side hinge member 42 from above, covering the outside of the cylindrical portion 422. The shaft cover 44 is formed in a cylindrical shape with a top surface and is open at the bottom. The shaft cover 44 has a slit 441 extending in the vertical direction.

The lower hinge 5 is composed of a frame-side hinge member 51 attached to the inner surface 24a of the vertical frame 24, and a door body-side hinge member 52 attached to the outer surface 3a of the door body 3 on the hanging side. The frame-side hinge member 51 and the door body-side hinge member 52 are formed from metal plates.

The frame-side hinge member 51 has a slat portion 511 attached to the inner surface 24a of the vertical frame 24, and a cylindrical portion 512 that is continuous with the slat portion 511 and protrudes from the vertical frame 24 to the outside of the room. A bearing member 514 is attached to the upper end of the lower shaft hole 513.

The door body side hinge member 52 is positioned above the frame side hinge member 51. The door body side hinge member 52 has a slat portion 521 attached to the outer surface 3a of the door body 3 on the hanging side, and a cylindrical portion 522 that is provided contiguous to the side of the slat portion 521 and protrudes from the door body 3 to the outside. The door body side hinge member 52 is connected to the frame side hinge member 51 so that it can be opened and closed by a shaft member 53 that passes through the cylindrical portion 522. An adjustment screw 523 is provided at the upper end of the cylindrical portion 522 to allow fine adjustment of the height of the door body 3. A shaft cover 54 is attached to the door body side hinge member 52 from above, covering the outside of the cylindrical portion 522.

Next, the structure of the upper hinge 4 will be described in more detail. The frame-side hinge member 41 is formed from a metal plate. As shown in Figures 2 to 6, the frame-side hinge member 41 has a rectangular slat portion 411 attached to the inner surface 24a of the vertical frame 24, and a cylindrical portion 412 (frame-side cylindrical portion) that is provided contiguous to the side of the slat portion 411 and protrudes from the vertical frame 24 to the outside of the room. The slat portion 411 has multiple screw holes 411a through which screws pass to fasten it to the inner surface 24a of the vertical frame 24. The shaft cover 44 is omitted from Figure 6.

The cylindrical portion 412 is formed by rolling a plate extending laterally from the slat portion 411 into a cylindrical shape. The cylindrical portion 412 extends in the vertical direction. As a result, a lower shaft hole 413 (see Figures 5 and 6) that penetrates the frame-side hinge member 41 vertically is formed inside the cylindrical portion 412. The tip of the cylindrically rolled plate is close to the boundary between the slat portion 411 and the cylindrical portion 412, forming a recessed groove portion 414 (see Figure 5) that extends vertically within the lower shaft hole 413. A temporary hanging bearing member 6 (bearing member) is attached to the upper end of the lower shaft hole 413. This temporary hanging bearing member 6 will be described further below. The lower end of the lower shaft hole 413 is closed by a projection 415.

The door body side hinge member 42 is formed from a metal plate. The door body side hinge member 42 has a rectangular slat portion 421 attached to the outer surface 3a of the door body 3 on the hanging side, and a cylindrical portion 422 (door body side cylindrical portion) that is provided contiguous to the side of the slat portion 421 and protrudes from the door body 3 to the outside. The slat portion 421 has multiple screw holes 421a through which screws pass to fasten it to the outer surface 3a of the door body 3.

The cylindrical portion 422 is formed by rolling a plate extending laterally from the slat portion 421 into a cylindrical shape. The cylindrical portion 422 extends in the vertical direction. An upper shaft hole 423 (see Figures 5 and 6) that penetrates vertically through the door body-side hinge member 42 is formed inside the cylindrical portion 422. The inner diameter of this upper shaft hole 423 is smaller than the inner diameter of the lower shaft hole 413 of the frame-side hinge member 41 and is approximately equal to the outer diameter of the shaft portion 431 of the shaft member 43. The tip of the cylindrically rolled plate is close to the boundary between the slat portion 421 and the cylindrical portion 422, and forms a recessed groove portion 424 (see Figure 5) that extends vertically within the upper shaft hole 423.

An upper opening 425 (cutout portion) and a lower opening 426 (cutout portion) are provided midway up and down the cylindrical portion 422. The upper opening 425 and the lower opening 426 are formed separately above and below the cylindrical portion 422. An upper shaft retaining ring 45 (ring member) is disposed in the upper opening 425, and a lower shaft retaining ring 46 (ring member) is disposed in the lower opening 426. The upper shaft retaining ring 45 and the lower shaft retaining ring 46 are disposed separately above and below the cylindrical portion 422.

The upper opening 425 is located near the upper end of the cylindrical portion 422. The upper opening 425 has a width in the vertical direction and is formed by cutting out the entire circumference of the cylindrical portion 422 in the circumferential direction.

The upper shaft stop ring 45, which is an annular resin member, is inserted into the upper opening 425. The upper shaft stop ring 45 is positioned so that it cannot move axially relative to the cylindrical portion 422.

The upper shaft retaining ring 45 is formed into a cylindrical shape with a width in the vertical direction. As shown in Figure 5, the upper shaft retaining ring 45 has a cylindrical outer shape and a cylindrical inner shape.

As shown in Figure 7, the upper shaft retaining ring 45 has a ring-shaped ring body 450, a protrusion 451 (locking portion) that protrudes outward, a slit 452, and a recessed portion 453.

The protrusion 451 protrudes outward from a portion of the circumference of the ring body 450. The protrusion 451 passes through the slit 441 in the shaft cover 44 and protrudes toward the slat portion 421 of the door body side hinge member 42. The protrusion 451 engages with the end of the slat portion 421 of the door body side hinge member 42 on the cylindrical portion 422 side.

As shown in FIG. 7, the protrusion 451 has a protrusion main body 451a, a first end protrusion 451b, and a second end protrusion 451c. The first end protrusion 451b and the second end protrusion 451c are formed at both ends in the thickness direction of the slat portion 421 of the door body side hinge member 42. As a result, the first end protrusion 451b and the second end protrusion 451c of the protrusion 451 clamp the end of the slat portion 421 of the door body side hinge member 42 on the cylindrical portion 422 side in the thickness direction, thereby engaging the end of the slat portion 421 on the cylindrical portion 422 side.

As shown in Figures 5 and 7, the slit 452 is formed by cutting through a portion of the circumference of the ring body 450 in an inward/outward direction and extending vertically. The slit 452, provided in a portion of the circumference, allows the upper shaft retaining ring 45 to elastically expand. In its elastically expanded state, the upper shaft retaining ring 45 is inserted into the upper opening 425 from the radially outer side of the cylindrical portion 422 and fitted onto the outer periphery of the shaft portion 431 of the shaft member 43 inserted into the upper shaft hole 423. The upper shaft retaining ring 45 is immovable in the axial direction relative to the cylindrical portion 422. The upper shaft retaining ring 45 is positioned across the recessed groove portion 424 of the cylindrical portion 422 and forms a step portion 427 within the recessed groove portion 424 (see Figure 6).

As shown in Figure 7, the recessed portion 453 is formed at the connection portion between the ring body 450 and the protrusion 451. The recessed portion 453 is formed as a recess that bends toward the ring body 450 so that the connection portion between the ring body 450 and the protrusion 451 becomes thinner. The provision of the recessed portion 453 makes it easier for the protrusion 451 to fall toward the ring body 450.

As shown in Figures 3 to 6, the lower opening 426 is provided near the lower end of the cylindrical portion 422. The lower opening 426 has a width in the vertical direction and is formed by cutting out the entire circumference of the cylindrical portion 422 in the circumferential direction.

A lower shaft stop ring 46, made of a resin annular member, is inserted into the lower opening 426. The lower shaft stop ring 46 is positioned so that it cannot move axially relative to the cylindrical portion 422.

The lower shaft retaining ring 46 is formed into a cylindrical shape that has a width in the vertical direction. As shown in Figure 5, the lower shaft retaining ring 46 has a polygonal cylindrical outer shape and a cylindrical inner surface. The lower shaft retaining ring 46 and the upper shaft retaining ring 45 are configured with different external shapes (outer shapes). This prevents the lower shaft retaining ring 46 and the upper shaft retaining ring 45 from being confused during assembly.

As shown in Figure 8, the lower shaft retaining ring 46 has a ring-shaped ring body 460, a protrusion 461 (locking portion) that protrudes outward, and a recessed groove portion 462 that is recessed into the inner circumference and extends in the vertical direction.

The protrusion 461 protrudes outward from a portion of the circumference of the ring body 460. The protrusion 461 passes through the slit 441 in the shaft cover 44 and protrudes toward the slat portion 421 of the door body side hinge member 42. The protrusion 461 engages with the end of the slat portion 421 of the door body side hinge member 42 on the cylindrical portion 422 side.

As shown in FIG. 8, the protrusion 461 has a protrusion main body 461a, a first end protrusion 461b, and a second end protrusion 461c. The first end protrusion 461b and the second end protrusion 461c are formed at both ends in the thickness direction of the slat portion 421 of the door body side hinge member 42. As a result, the first end protrusion 461b and the second end protrusion 461c of the protrusion 461 clamp the end of the slat portion 421 of the door body side hinge member 42 on the cylindrical portion 422 side in the thickness direction, thereby engaging the end of the slat portion 421 on the cylindrical portion 422 side.

The shaft member 43 is a rod-shaped metal body that forms the pivot axis of the upper hinge 4. As shown in Figures 3 to 6, the shaft member 43 has a long shaft portion 431 and a head portion 432 that is provided at the upper end of the shaft portion 431 and has a larger diameter than the shaft portion 431. The shaft portion 431 is formed to be longer than the length of the upper shaft hole 423 of the door body-side hinge member 42. More specifically, as shown in Figure 6, when the shaft portion 431 is inserted to its deepest point from the upper end of the upper shaft hole 423, it axially penetrates the upper shaft hole 423 of the cylindrical portion 422 and protrudes from the lower end of the upper shaft hole 423, and has a length that allows it to be inserted sufficiently into the lower shaft hole 413 of the frame-side hinge member 41. The lower end 431a of the shaft portion 431 is positioned inside the cylindrical portion 412 of the frame-side hinge member 41.

The outer diameter of the shaft portion 431 of the shaft member 43 is slightly smaller than the inner diameter of the cylindrical portion 422 of the door body side hinge member 42. In this embodiment, as shown in Figure 6, the outer diameter of the shaft portion 431 of the shaft member 43 is formed to be smaller than the inner diameter of the cylindrical portion 422 of the door body side hinge member 42, for example, by 0.3 mm, providing a clearance of 0.3 mm.

As shown in Figures 5 and 6, a protrusion 433 that protrudes radially outward is provided on the outer peripheral surface of the shaft portion 431 of the shaft member 43. The protrusion 433 is located midway up and down on the shaft portion 431. As shown in Figure 6, the protrusion 433 is located in a position that prevents the shaft portion 431 of the shaft member 43 from slipping downward from the lower end of the upper shaft hole 423 even when the shaft portion 431 is inserted to the deepest point into the upper shaft hole 423.

As shown in Figure 5, the shaft portion 431 of the shaft member 43 is inserted into the upper shaft hole 423 with the protrusion 433 aligned with the recessed groove 424 within the upper shaft hole 423. This engages the protrusion 434 with the recessed groove 424, as well as with the recessed groove 462 of the lower shaft stop ring 46 located on the lower side in the vertical direction, allowing the shaft member 43 to slide linearly up and down within the upper shaft hole 423 along the recessed groove 424. However, because the inner diameter of the upper shaft hole 423 is approximately equal to the outer diameter of the shaft portion 431, as shown in Figure 9, the engagement between the protrusion 433 and the recessed groove 424 prevents the shaft member 43 from rotating around its axis relative to the upper shaft hole 423.

In Figure 6, the inner diameter of the lower shaft hole 413 of the frame-side hinge member 41 is equal to or greater than the outer diameter of the shaft portion 431, including the protrusion 433, of the shaft member 43. Therefore, the shaft member 43, with the protrusion 433 of the shaft portion 431 disposed within the lower shaft hole 413, can rotate about its axis relative to the lower shaft hole 413 as the door body-side hinge member 42 rotates when the door body 3 is opened or closed.

During the door body 3 hanging operation, the operator slides the shaft member 43 in the upper shaft hole 423 upward to the position indicated by the dotted line in Figure 6 . At this time, the shaft portion 431 slides along the inner surface of the upper shaft stop ring 45, and the protrusion 433 abuts from below against the step 427 formed in the groove portion 424 by the upper shaft stop ring 45. This restricts the upper position of the shaft member 43, and the shaft member 43 is held in the upper position by the frictional force of the upper shaft stop ring 45. At this time, the lower end 431a of the shaft portion 431 protrudes downward from the lower end of the upper shaft hole 423, as shown in Figure 6 . The protrusion 433 of the shaft portion 431 is positioned in a position that extends downward from the lower end of the upper shaft hole 423. In this state, the protrusion 433 remains engaged with the groove portion 424 of the upper shaft hole 423, preventing the shaft member 43 from rotating around its axis relative to the upper shaft hole 423.

Next, the temporary hanging bearing member 6 of the frame-side hinge member 41 will be described with reference to Figures 3 to 6. The temporary hanging bearing member 6 is a one-piece molded product made of resin material, and is attached to the upper end of the frame-side hinge member 41.

The temporary hanging bearing member 6 is formed in a cylindrical shape extending in the vertical direction. The temporary hanging bearing member 6 receives the lower end of the shaft member 43 that passes through the door body side hinge member 42. The temporary hanging bearing member 6 has an insertion tube portion 61 that is inserted into the lower shaft hole 413 of the frame body side hinge member 41, a flange portion 62 provided at the upper end of the insertion tube portion 61, and a cylindrical wall portion 63 provided on the upper surface of the flange portion 62.

In Figure 6, the outer diameter of the insertion tube portion 61 is approximately equal to the inner diameter of the lower shaft hole 413. A shaft insertion hole 612 is formed inside the insertion tube portion 61, into which the shaft portion 431 of the shaft member 43, which passes through the upper shaft hole 423 of the door body hinge member 42, is inserted. The shaft insertion hole 612 passes through the insertion tube portion 61. The inner diameter of the shaft insertion hole 612 is slightly larger than the outer diameter of the shaft portion 431. In this embodiment, the inner diameter of the shaft insertion hole 612 is larger than the outer diameter of the shaft portion 431 of the shaft member 43, for example, by 0.3 mm, providing a clearance of 0.3 mm.

As shown by the solid line in Figure 6 , the axial length of the insertion tube portion 61 is such that when the shaft member 43 in the upper shaft hole 423 of the door body hinge member 42 is pushed all the way down, the lower end 431a of the shaft portion 431 is positioned above the lower end 61a of the insertion tube portion 61. In other words, the lower end 61a of the insertion tube portion 61 is positioned below the lower end 431a of the shaft member 43. The entire lower portion of the shaft portion 431 is disposed inside the insertion tube portion 61, and is covered and held by the insertion tube portion 61. In this embodiment, for example, the length L of the insertion tube portion 61 is 30 mm. As a result, the lower portion of the shaft portion 431 is covered and held by the insertion tube portion 61, thereby improving the holding force for the lower portion of the shaft portion 431.

As shown in Figure 5, the outer peripheral surface of the insertion tube portion 61 is provided with a single axially extending protrusion 611. The insertion tube portion 61 is inserted into the lower shaft hole 413 with the protrusion 611 aligned with the recessed groove 414 within the lower shaft hole 413. As a result, the temporary hanging bearing member 6 is non-rotatably mounted on the upper part of the cylindrical portion 422 of the door body side hinge member 42, and is attached non-rotatably around the axis of the lower shaft hole 413.

The flange portion 62 has a larger diameter than the outer diameter of the insertion tube portion 61 and protrudes radially outward from the upper end of the insertion tube portion 61. The flange portion 62 abuts against the upper end surface of the cylindrical portion 412, holding the insertion tube portion 61 at the upper end of the lower shaft hole 413.

The cylindrical wall portion 63 is formed in a generally cylindrical shape to surround the outer periphery of the shaft insertion hole 612 that opens into the upper surface of the flange portion 62. The inside of the cylindrical wall portion 63 is connected to the shaft insertion hole 612. When the temporary hanging bearing member 6 is attached to the lower shaft hole 413, the cylindrical wall portion 63 protrudes upward from the upper end of the frame-side hinge member 41. The outer diameter of the cylindrical wall portion 63 is smaller than the outer diameter of the flange portion 62 and is generally equal to the outer diameter of the cylindrical portion 422 of the door body-side hinge member 42.

As shown in Figures 3 to 5, the cylindrical wall portion 63 has a cutout portion 631. The cutout portion 631 has a shape in which a portion of the wall of the cylindrical wall portion 63 is removed by a predetermined width from the upper end of the cylindrical wall portion 63 to the upper surface of the flange portion 62. The width of the cutout portion 631 is larger than the outer diameter of the shaft portion 431 of the shaft member 43, and is wide enough to allow the lower end 431a of the shaft portion 431 to be inserted laterally inside the cylindrical wall portion 63.

In the upper hinge 4 configured as described above, the upper shaft stop ring 45 has a protrusion 451 that protrudes outward along part of its circumference. The protrusion 451 engages with the end of the cylindrical portion 422 of the slat portion 421 of the door body side hinge member 42. In addition, the lower shaft stop ring 46 has a protrusion 461 that protrudes outward along part of its circumference. The protrusion 461 engages with the end of the cylindrical portion 422 of the slat portion 421 of the door body side hinge member 42.

As a result, even if the door body 3 equipped with the door closer 31 is suddenly opened or closed in an inverted manner, the protrusion 451 of the upper shaft stop ring 45 engages with the end of the cylindrical portion 422 of the slat portion 421 of the door body side hinge member 42, and the protrusion 461 of the lower shaft stop ring 46 engages with the end of the cylindrical portion 422 of the slat portion 421 of the door body side hinge member 42, thereby preventing the upper hinge 4 from moving in all directions, including left and right, front and rear.

Next, the procedure for hanging the door body 3 will be explained. Prior to the hanging operation, the shaft member 43 of the door body side hinge member 42 of the upper hinge 4 is pulled all the way up to the upper position, as shown by the chain line in Figure 6.

First, as shown in Figure 10, the door body side hinge member 52 of the lower hinge 5 is connected to the frame side hinge member 51 of the lower hinge 5. More specifically, the lower end of the shaft member 53 is inserted into the bearing member 514 provided at the upper end of the cylindrical portion 512 of the frame side hinge member 51.

Next, the two top hinges 4 are connected. More specifically, the door body 3 to which the bottom hinge 5 is connected is moved toward the vertical frame 24, using the bottom hinge 5 as a fulcrum, thereby moving the lower end 431a of the shaft portion 431 of the shaft member 43 that protrudes downward from the door body-side hinge member 42 of the top hinge 4 laterally. The lower end 431a of the shaft portion 431 is passed through the notch 631 (see Figure 3) of the temporary hanging bearing member 6, thereby inserting the shaft portion 431 inside the cylindrical wall portion 63. As a result, the door body-side hinge member 42 is placed on the upper end surface of the temporary hanging bearing member 6, completing the temporary hanging of the door body 3.

After the temporary hanging is complete, when the door body 3 is opened toward the outside by a predetermined angle, the door body side hinge member 42 rotates as the door body 3 opens, causing the shaft member 43 to rotate. As the shaft member 43 rotates, the protrusion 451 of the upper shaft stop ring 45 falls toward the ring body 450 due to the recessed portion 453 (see Figures 5 and 7), and as shown in Figure 7, the end of the cylindrical portion 422 side of the slat portion 421 of the door body side hinge member 42 fits into and is locked.

Then, push the shaft member 43 all the way down, as shown by the solid line in Figure 6. In this state, the lower end 61a of the insertion tube portion 61 of the temporary hanging bearing member 6 and the lower end 431a of the shaft member 43 are positioned higher than the lower end 61a of the insertion tube portion 61. Then, fine-tune the height of the door body 3 by rotating the height adjustment screw 523 (see Figure 2) of the lower hinge 5 with a screwdriver or similar tool.

The entrance door apparatus 1 according to this embodiment has the following advantages. Specifically, in the entrance door apparatus 1 according to this embodiment, the upper hinge 4 comprises a frame-side hinge member 41 fixed to the frame 2 and having a vertically extending cylindrical portion 412; a door body-side hinge member 42 fixed to the door body 3 and positioned above the frame-side hinge member 41, having a vertically extending cylindrical portion 422 and cutouts (upper opening 425, lower opening 426) formed midway along the vertical axis of the cylindrical portion 422; a shaft member 43 axially penetrating the cylindrical portion 422 of the door body-side hinge member 42 and having its lower end positioned inside the cylindrical portion 412 of the frame-side hinge member 41; and ring members (upper shaft stop ring 45, lower shaft stop ring 46) positioned in the cutouts (upper opening 425, lower opening 426) and having projections 451, 461 that engage with the door body-side hinge member 42. As a result, even if the door body 3 is suddenly opened or closed by reversing, the protrusions 451 of the ring members (upper shaft stop ring 45, lower shaft stop ring 46) engage with the end of the cylindrical portion 422 of the slat portion 421 of the door body side hinge member 42, preventing the upper hinge 4 from moving in all directions, including left and right and front and rear.

In this embodiment, the lower end 61a of the insertion tube portion 61 of the temporary hanging bearing member 6 is located lower than the lower end 431a of the shaft member 43. As a result, the lower part of the shaft portion 431 is covered and held by the insertion tube portion 61, thereby improving the holding force for holding the lower part of the shaft portion 431.

In this embodiment, the ring members (upper shaft stop ring 45, lower shaft stop ring 46) are spaced apart vertically. This allows the protrusions 451 to engage with the end of the cylindrical portion 422 of the slat portion 421 of the door body hinge member 42 at multiple locations in the vertical direction, further restricting movement of the upper hinge 4 in all directions, including left and right, front and rear.

In this embodiment, the lower shaft retaining ring 46 and the upper shaft retaining ring 45 are configured with different external shapes (outer shapes). This prevents the lower shaft retaining ring 46 and the upper shaft retaining ring 45 from being confused during assembly.

In this embodiment, the upper shaft retaining ring 45 has a slit 452 formed by cutting through a portion of its circumference in the inward and outward directions. The slit 452 provided in the portion of its circumference allows the upper shaft retaining ring 45 to elastically expand. This makes it easy to fit the upper shaft retaining ring 45 onto the outer periphery of the shaft portion 431 of the shaft member 43 inserted into the upper shaft hole 423 during assembly. This improves workability during assembly.

In this embodiment, a recess 453 is formed in the upper shaft stop ring 45 at the connection between the ring body 450 and the protrusion 451. The recess 453 makes it easier for the protrusion 451 to engage with the end of the cylindrical portion 422 of the slat portion 421 of the door body hinge member 42. This improves workability during assembly.

In this embodiment, the door body 3 has a door closer 31 that controls the movement speed of the door body 3. As a result, even if the door body 3 equipped with the door closer 31 is suddenly opened or closed in a reverse direction, the protrusions 451 of the ring members (upper shaft stop ring 45, lower shaft stop ring 46) engage with the end of the cylindrical portion 422 of the slat portion 421 of the door body side hinge member 42, thereby suppressing movement of the upper hinge 4 in all directions, including left and right, front and rear.

The above describes preferred embodiments of the present disclosure. The present disclosure is not limited to the above-described embodiments and can be modified as appropriate.

1. Entrance door device, 2. Frame, 3. Door body, 4. Upper hinge (hinge), 6. Temporary hanging bearing member (bearing member), 31. Door closer (door opening/closing control mechanism), 41. Frame-side hinge member, 42. Door body-side hinge member, 43. Shaft member, 45. Upper shaft stop ring (ring member), 46. Lower shaft stop ring (ring member), 412. Cylindrical portion (frame-side cylindrical portion), 422. Cylindrical portion (door body-side cylindrical portion), 425. Upper opening (cutout portion), 426. Lower opening (cutout portion), 450, 460. Ring body, 451, 461. Protrusion (locking portion), 452. Slit

Claims (7)

A door frame is provided, and a door body is attached to the frame via a hinge so as to be able to open and close.
The hinge is
a frame body side hinge member fixed to the frame body and having a frame body side cylindrical portion extending in the vertical direction;
a door body side hinge member fixed to the door body, disposed above the frame body side hinge member, and having a door body side cylindrical portion extending in the vertical direction, and a cutout portion formed by cutting out a portion of the door body side cylindrical portion along the circumferential direction in the vertical direction;
a shaft member that axially penetrates the door body side cylindrical portion of the door body side hinge member and has a lower end portion that is disposed inside the frame body side cylindrical portion of the frame body side hinge member;
a ring member that is disposed in the cutout portion and has a locking portion that locks onto the door body side hinge member. a bearing member provided at an upper end of the frame body-side cylindrical portion of the frame body-side hinge member so as not to rotate, formed in a cylindrical shape extending in the vertical direction, and configured to receive a lower end of the shaft member that is passed through the door main body-side hinge member;
The entrance door apparatus according to claim 1 , wherein a lower end of the bearing member is positioned lower than a lower end of the shaft member. An entrance door device as described in claim 1 or 2, in which multiple ring members are provided, spaced apart vertically. The entrance door device of claim 3, wherein at least two of the multiple ring members have different external shapes. An entrance door device according to any one of claims 1 to 4, wherein the ring member has a slit formed by cutting through a portion of its circumference in an inward/outward direction. The ring member has a ring body and the locking portion that protrudes outward from a portion of the ring body in a circumferential direction,
The entrance door device according to any one of claims 1 to 5, wherein a recess is formed at the connection portion between the ring body and the locking portion. An entrance door device according to any one of claims 1 to 6, wherein the door body is equipped with a door opening/closing control mechanism that controls the movement speed of the door body.