JP3002107U - Entrance door structure - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a structure of an entrance door that allows pedestrians and wheelchairs to smoothly pass through the entrance without impairing the function of the entrance door. An entrance door in which a step 7b is formed on a lower frame upper surface 7a of a door frame 2 for supporting the door 3 to open and close through a door hinge provided on one side, and a lower end of the door 3 contacts when the door 3 is closed. 1, the step 7 of the lower frame upper surface 7a
b was in the range of 1 to 3 mm.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to the structure of an entrance door installed at the entrance of a condominium or the like, and more particularly to the structure of an entrance door that facilitates walking by reducing the passage and steps of wheelchairs used by people with disabilities. .

[0002]

[Prior art]

 Entrance doors usually have a step between the floor on the indoor side and the floor on the outdoor side, and are set to a considerable height for reasons such as ensuring a reliable drainage and maintaining airtightness. Was common. As an example of this type of entrance door, a fire door as shown in Fig. 7 installed at the entrance of an apartment or the like is known. In this fire door, a step 40b having a height A between the indoor side floor surface 31 and the outdoor side floor surface 32 of about 18 mm is provided on a lower frame upper surface 40a constituting the door frame 40. A groove 40c having a concave cross section is formed in the step 40b, and a cushioning member 50 made of rubber is fitted into the groove 40c. As a result, when the door 30 is closed, the lower end of the door 30 contacts the cushioning member 50, and the airtightness inside and outside the room can be maintained.

[0003]

[Problems to be solved by the device]

 However, in the structure of the entrance door such as the above fire door, there is a problem that the person with a physical disability cannot smoothly pass through when entering or exiting the entrance by walking in a wheelchair because the drop in the inside and outside is large. In other words, if this entrance door is installed at the entrance of a condominium, etc., there will be a step difference of at least 18 mm inside and outside, so when a wheelchair with 20-inch wheels enters the room from the outside, There was a drawback that it took a lot of force to get up and it was not easy to pass. There was also a problem that the wheelchair rattled and the wheelchair became unstable when going out of the room. The present invention has been made in view of the above problems, and an object thereof is to provide a structure of an entrance door that can smoothly pass through the entrance with a wheelchair or walking without impairing the function of the entrance door.

[0004]

[Means for Solving the Problems]

 According to the present invention, in order to achieve the above object, a step is formed on the upper surface of the lower frame of a door frame that supports the door openably and closably via a door hinge provided on one side, and a lower end of the door frame contacts when the door is closed. The structure of the entrance door described above is characterized in that the step on the upper surface of the lower frame is within the range of 1 to 3 mm.

[0005]

[Action]

 In the structure of the entrance door, the step on the upper surface of the lower frame is set in the range of 1 to 3 mm, so that when the door is closed, the lower end can be in contact with it to ensure drainage and maintain airtightness. In addition, since the step on the upper surface of the lower frame is small, the difference between the floor on the indoor side and the floor on the outdoor side at the entrance / exit is small, which makes walking easier and allows wheelchair wheels to pass smoothly.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing the structure of an entrance door according to the present invention, and FIG. 2 is a transverse sectional view showing the structure of the entrance door. The entrance door 1 is a class A fire door in which a door 3 is attached to a door frame 2 via a door hinge and blocks the flow of smoke when closed, and is configured to be installed at the entrance of a condominium or the like. .

In the door frame 2, the left and right frames 4, 5, the upper frame 6 and the lower frame 7 are made of steel plates having a substantially U-shaped cross section, and these steel plates are integrated by welding. An anchor 8 is welded to each of the frames 4 to 7 on the opening side, and a reinforcing bar (not shown) is welded to the anchor 8 to firmly fix it to the foundation concrete 9 at the entrance / exit. The left and right frames 4 and 5 and the upper frame 6 are provided with a groove 10 in an inner peripheral portion facing the peripheral edge of the door 3, and a cushioning member 11 made of rubber or the like is fitted in the groove 10. As a result, when the door 3 is closed, the peripheral edge of the door 3 comes into contact with the cushioning member 11 to absorb the shock and maintain high airtightness.

The lower frame 7 has a step 7b having a height T of about 3 mm formed on the upper surface 7a thereof. The lower frame 7 has a step 7b between the inner edge 7c and the indoor floor 31 and an outer edge 7d. The same level difference is also provided between and the outdoor floor 32. This causes a drop inside and outside through the lower frame 7, but since each step is within the range of 1 to 3 mm, the overall drop can be kept within a range of several mm. In the door body 3a of the door 3, one side portion 3b is openably and closably attached to the right frame 4 side of the door frame 2 by the support arm 12, and the other side portion 3c is provided with a lock. Although not shown, this lock is a general-purpose type equipped with a locking device, and has a retractable claw that is inserted into a hole provided on the left frame 5 side of the door frame 2.

Further, an accommodating portion 13 for accommodating the seal mechanism 17 is provided inside the lower portion 3d of the door body 3a. The accommodating portion 13 is composed of a holding member 14 having a substantially U-shaped cross section and a guide member 15, and is fixed to the lower opening of the door 3 with the respective openings facing downward. That is, the holding member 14 is formed to be slightly shorter than the door body 3a and joined to the inner side wall of the panel 3e. The inner side wall of the holding member 14 is provided with a metal fitting 16 having an L-shaped cross section. It is joined. The guide member 15 is joined between the end edge of the L-shaped metal fitting 16 and the top surface of the holding member 14.

The guide member 15 is formed to be shorter than the holding member 14, and as shown in FIGS. 1 and 4, the lower side 15b is open and the pair of guide rails are formed on the inner wall of the upper side 15a. 15c is integrally provided. With the guide rail 15c as a partition, the holders 22 and 23 of the seal mechanism 17 are arranged on the upper side 15a, and the movable member 18 is arranged on the lower side 15b.

The seal mechanism 17 includes a movable member 18, a seal member 19 and an operating rod 20, and is configured to seal a gap generated between the door frame 2 and the door 3 when the door 3 is closed. The movable member 18 is formed in a substantially H shape, which is narrower than the holding member 14 and has the same length. As shown in FIG. 3, the movable member 18 has a support shaft 18d protruding from an inner wall 18c of the upper side 18a. The seal member 19 has a T-shaped upper portion 19a and a hollow lower portion 19b, and is made of an elastic material such as rubber having a length equal to that of the movable member 18. The seal member 19 is attached by fitting the upper portion 19a into the opening on the lower side 18b, and is vertically movable along with the movable member 18 along the inner wall of the guide member 15.

The actuation rod 20 actuates the movable member 18, and is configured to be accommodated in the guide member 15 by providing the leaf spring 21 with the stopper 25. The leaf spring 21 is bent in an inverted V shape so as to have a recessed center, and rectangular holders 22 and 23 are attached to both ends of the leaf spring 21, respectively. A rod 24 is connected to the holder 23 side, and a cylindrical stopper 25 is integrally formed at the end of the rod 24. The operating rod 20 has a total length from the stopper 25 to the one holding member 22 longer than the lateral width of the door body 3a, and is flexibly deformed and shortened by receiving a pressing force when the door 3 is closed.

The operating rod 20 is housed on the upper side 18a of the movable member 18 so that the recess 21a of the leaf spring 21 is slidably contacted with the support shaft 18d, and then, together with the movable member 18. It is accommodated in the guide member 15. In this state, the holders 22 and 23 are placed on the guide rail 15c of the guide member 15, the leaf spring 21 lifts the support shaft 18d, and the end surface of the lower side 15b of the guide member 15 and the lower portion 19b of the seal member 19 are separated. The bottom surface 19c and the bottom surface 19c are kept substantially flush with each other (position indicated by a virtual line in FIG. 1). Further, the one holder 22 faces the panel 3e on the other side portion 3c of the door 3, and the end portion of the stopper 25 projects outward from the opening 3f formed in the panel 3e of the one side portion 3b. When the seal member 19 moves downward, it projects from the lower side 15b of the guide member 15 and the lower side 3d of the door body 3a (solid line position in FIG. 1).

By the way, the stopper 25 protrudes and retracts from the one side portion 3b according to opening and closing of the door 3, and when the stopper 25 projects from the one side portion 3b without any trouble and is partially exposed, the door 3 is opened. Therefore, the projection of the stopper 25 is restricted when the door 3 is closed. That is, when the door 3 is closed, the protruding end of the stopper 25 comes into contact with the metal fitting 4a provided on the inner side wall of the door frame 4 and receives a pressing force. Then, one holder 22 comes into contact with the panel 3e of the other side portion 3c, and the leaf spring 21 bends and deforms downward. Along with this, the seal member 19 moves down along with the movable member 18 along the inner side wall of the guide member 15, and projects downward from the lower side 3d of the door body 3a.

As a result, as shown in FIG. 5, the bottom surface 19c of the seal member 19 is brought into contact with the lower frame upper surface 7a of the door frame 2 to maintain airtightness. It should be noted that it may be adjusted in advance so that there is a small space between the two 7a, 19c. On the other hand, when the door 3 is opened, the pressing force applied to the leaf spring 21 is deenergized and the leaf panel 21 is restored, so that the movable member 18 and the seal member 19 are moved upward. Then, the seal member 19 is housed in the door body 3a, and the end portion of the stopper 25 again projects outward.

As described above, according to the structure of the entrance door 1, since the step 7b of the lower frame 7 is slight, for example, when a wheelchair with wheels of about 30 inches passes through the entrance and exit. The wheels rotate smoothly and can pass through the front door without hindrance. Also, even when a person passes by, since the heights inside and outside are almost the same, it is possible to pass without feeling a drop.

When closing the opened door 3, the seal member 19 moves downward when the end of the stopper 25 comes into contact with the metal fitting 4a of the door frame 4, so that the upper surface 7a of the lower frame 7 is sealed. The member 19 abuts on and maintains airtightness. Therefore, the inside and outside of the room are shielded by the door 3 and the seal member 19, and water is drained to prevent intrusion of water and dust. Moreover, since the high airtightness is maintained, the flow of fire smoke can be sufficiently blocked.

Although a slight step 7b is provided on the lower frame upper surface 7a in the above embodiment, the upper surface 27a of the lower frame 27 is inclined from the inner edge toward the outer edge as shown in FIG. The structure may have a step T. As a result, when the door 3 is closed, airtightness is maintained, and when the door 3 is opened, there is a gentle slope between the indoor floor 31 and the outdoor floor 32, which allows the wheelchair to travel more smoothly. It will be

Further, in the entrance door 1, the seal member 19 is moved up and down by the seal mechanism 17. However, a limit switch is provided on the door contact surface of the door frame 2, and the limit switch The seal member 19 may be activated by a signal. In this case, the seal member 19 is biased upward by a spring and moved downward by an electromagnetic solenoid. When the limit switch is turned on when the door 3 is closed, the electromagnetic solenoid is also turned on. The member 19 is moved downward. On the other hand, when the limit switch is turned off when the door 3 is opened, the electromagnetic solenoid is turned off and the seal member 19 is moved upward by the spring. Therefore, similar to the above-described embodiment, when the door 3 is closed, the seal member 19 can prevent water and dust from entering.

[0020]

[Effect of device]

 As described above, according to the present invention, since a step difference of 1 to 3 mm is provided on the upper surface of the lower frame that constitutes the door frame, it is possible to maintain the drainage and the airtightness, and the function of the front door is not impaired. Also, it can block the flow of fire smoke and can be used in fire doors. In addition, since the step on the upper surface of the lower frame is small and the difference between the floor on the indoor side and the floor on the outdoor side at the entrance / exit of the entrance is small, the wheels of the wheelchair, etc. can pass smoothly and pass by people with disabilities. The effect is that it does not burden the user.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing the structure of an entrance door according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the structure of the entrance door.

FIG. 3 is a perspective view of a seal mechanism.

FIG. 4 is a perspective view of a guide member.

FIG. 5 is an operation explanatory view of a seal member.

FIG. 6 is a sectional view of a lower frame according to another embodiment.

FIG. 7 is a cross-sectional view of a conventional lower frame and door.

[Explanation of symbols]

 1 entrance door 2 door frame 3 door 7a lower frame upper surface 7b step

Claims (2)

[Scope of utility model registration request] 1. A structure of an entrance door in which a step is formed on a lower frame upper surface of a door frame for supporting the door openably and closably via a door hinge provided on one side, and a lower end of the door frame contacts when the door is closed. A structure of an entrance door, characterized in that the step on the upper surface of the lower frame is set in a range of 1 to 3 mm. 2. A seal member having a length substantially equal to the lateral width of the door, vertically movably provided on the lower side of the door, and moving downward when the door is closed so that the lower end contacts the upper surface of the lower frame. The structure of the entrance door, which is characterized by that.