Door stopper

Abstract

To provide a door stopper that allows for easy operation of holding and releasing the door in the open position, while also reducing damage and minimizing the number of components. [Solution] A door stopper 1 that holds open a door having a downwardly rotating lever handle 81, comprising a support portion 2 provided on a wall surface 9 facing the lever handle 81 when the door is open, a rotation axis 3 provided on the support portion 2, and a hook portion 4 that can rotate around the rotation axis 3. The hook portion 4 has a hook portion 42 for hooking the handle portion 82 of the lever handle 81, a guide portion 41 positioned A in front of the hook portion 42 and for guiding the handle portion 82 to the hook portion 42, a contact portion 43 formed at the rear end and capable of contacting the support portion 2, and a rear end notch portion 44 cut out above the contact portion 43.

Description

Technical Field

[0006]

[0001] This invention relates to a door stopper for holding the open state of a door having a downwardly rotating lever handle.

Background Art

[0002] Switching between the state where the opening of the door is held and the release of that state is an operation frequently performed in daily life and business. Therefore, it is desirable that this switching can be performed as simply and reliably as possible. As means for realizing this switching, stoppers for fixing the door at the foot, door closers with an open holding function, door stoppers of the type for fixing the lever handle, etc. have been put into practical use. However, the stopper for fixing the door at the foot lacks simplicity because an operation of bending down to fix the door is required. The door closer with an open holding function lacks reliability because the force for fixing the door is weak and the door may be closed unintentionally when blown by strong wind. The door stopper of the type for fixing the lever handle has room for improvement in terms of reducing the number of components and strength.

[0003] Conventionally, as technologies related to door stoppers, Patent Documents 1 to 4 have been disclosed.

[0004] The door stopper of Patent Document 1 is attached at the same height as the handle of a door having a substantially L-shaped door handle on the wall surface on the side where the door is opened, and by pressing the door against the wall surface, the substantially L-shaped handle is temporarily fixed in the recess of the door stopper, and it is characterized in that the temporary fixing can be released by twisting the substantially L-shaped handle upward or downward and pulling it forward.

[0005] The door opening lock device of Patent Document 2 is characterized in that engaging tools such as cutouts and slits are formed on one side surface of the inner surface side handle piece of the door handle, and a locking tool for engaging with and locking the engaging tools such as the cutouts and slits is attached to the wall surface side where the door handle contacts when the door is opened. <00XXXXX20> The door stopper described in Patent Document 3 is provided on the wall surface facing the lever handle when the door is in the open position, and comprises a guide portion that contacts the handle portion of the lever handle to guide engagement with the handle portion, and a holding portion formed continuously with the guide portion that engages with the handle portion and holds the handle portion, thereby maintaining the door in the open position. The holding portion has a base portion that is provided perpendicular to the base plate and a joint portion provided on the base end side, and the joint portion has an axis provided horizontally, and is configured so that the intermediate bent portion and the tip portion relative to the base end side can rotate upward with the pivoted joint portion as the pivot point. Furthermore, a torsion coil spring or a leaf spring is attached to this joint portion and a biasing force acts to keep the base portion in a horizontal and straight position at all times.

[0007] The door stopper described in Patent Document 4 is provided at the opening position of the door and is equipped with a movable engaging piece that engages with the door handle. When the engaging piece is in an upright position, the tip surface of the elastic piece presses against the end face of the engaging piece to stably maintain this upright position. When the engaging piece is folded down, the tip surface of the elastic piece presses against the contact surface of the engaging piece to stably maintain this folded down position.

[0008] However, in the technologies disclosed in Patent Documents 1 and 2, since they are composed of a single component, there is a risk that excessive force may be applied when the handle is pressed, causing the door stopper to break.

[0009] In the technology disclosed in Patent Document 3, a torsion coil spring or leaf spring is attached to the joint for upward rotation, and a biasing force is applied to keep the base in a horizontal, straight position at all times. Because a torsion coil spring or the like is required in the joint, it is difficult to reduce the number of components in the door stopper.

[0010] In the technology disclosed in Patent Document 4, an elastic piece is required to maintain the upright and folded states of the latching piece, which makes it difficult to reduce the number of components in the door stopper. [Prior art documents] [Patent Documents]

[0011] [Patent Document 1] Japanese Patent Application Publication No. 10-238194 [Patent Document 2] Registered Utility Model No. 3010137 Gazette [Patent Document 3] Japanese Patent Application Publication No. 8-60929 [Patent Document 4] Japanese Patent Application Publication No. 9-324576 [Overview of the project] [Problems that the invention aims to solve]

[0012] Therefore, the present invention was devised in view of the above circumstances, and its objective is to provide a door stopper that can easily hold and release the door in the open position, while also suppressing damage and reducing the number of components. [Means for solving the problem]

[0013] The door stopper according to the present invention is a door stopper that holds open a door having a lever handle that rotates downward, and comprises a support portion provided on a wall surface facing the lever handle when the door is in the open state, a rotating shaft provided on the support portion, and a hook portion that is rotatable about the rotating shaft, wherein the hook portion has a hook portion for hooking the handle portion of the lever handle, a guide portion positioned in front of the hook portion and for guiding the handle portion to the hook portion, a contact portion formed at the rear end and capable of contacting at least one of the wall surface and the support portion, and a rear end notch portion cut out above the contact portion. [Effects of the Invention]

[0014] According to the present invention, the device is equipped with a hook portion that is rotatable around a rotation axis, the hook portion having a hook portion for hooking the handle portion of the lever handle, a guide portion positioned in front of the hook portion for guiding the handle portion to the hook portion, a contact portion formed at the rear end and capable of contacting at least one of the wall surface and the support portion, and a rear end notch cut out above the contact portion. Because the rear end notch is located above the contact portion, when the handle portion is pressed against the guide portion, the guide portion and the hook portion of the hook portion can be rotated upward. The guide portion of the hook portion, when rotated upward, guides the horizontal handle portion to the hook portion. When the lower end of the guide portion exceeds the handle portion of the lever handle, the hook portion of the hook portion rotates downward, and the handle portion is hooked onto the hook portion at the rear of the guide portion. To release the open state of the door, the lever handle is rotated downward and separated from the door stopper. This makes it easy to maintain and release the open state of the door.

[0015] Furthermore, according to the present invention, when the handle is pressed against the guide, the guide and hook can be rotated upward. Therefore, excessive force is prevented when the handle is pressed against the guide, thus preventing damage to the door stopper.

[0016] In addition, according to the present invention, the hook portion has a contact portion formed at the rear end that can contact at least one of the wall surface and the support portion, and a rear end notch cut out above the contact portion. As a result, elastic members such as coil springs for maintaining a horizontal position, as in the conventional method, are not required, thus reducing the number of components in the door stopper. [Brief explanation of the drawing]

[0017] [Figure 1] Figure 1 is a perspective view showing a door stopper in the first embodiment. [Figure 2] Figure 2(a) is a side view of the door stopper in the first embodiment, and Figure 2(b) is a front view of the door stopper in the first embodiment. [Figure 3] Fig. 3(a) is a side view of the door stopper in the first embodiment when the contact portion contacts the support portion, and Fig. 3(b) is a front view of the door stopper in the first embodiment when the control portion contacts the support portion. [Figure 4] Figs. 4(a) and 4(b) are side cross-sectional views showing an example of the operation of the door stopper in the first embodiment when holding the open state of the door. [Figure 5] Figs. 5(a) and 5(b) are side cross-sectional views showing an example of the operation of the door stopper in the first embodiment when holding the open state of the door. [Figure 6] Figs. 6(a) and 6(b) are side cross-sectional views showing an example of the operation of the door stopper in the first embodiment when releasing the open state of the door. [Figure 7] Fig. 7(a) is a side cross-sectional view of the door stopper in the second embodiment, and Fig. 7(b) is a side cross-sectional view of the door stopper in the third embodiment. [Figure 8] Fig. 8(a) is a side cross-sectional view of the door stopper in the fourth embodiment, and Fig. 8(b) is a front view of the door stopper in the fourth embodiment. [Figure 9] Fig. 9 is a front view of the door stopper in the fifth embodiment.

Mode for Carrying Out the Invention

[0018] Hereinafter, an example of a door stopper as an embodiment of the present invention will be described with reference to the drawings.

[0019] <First Embodiment> As shown in Fig. 1, the door stopper 1 is a door stopper that holds the open state of a door 8 having a lever handle 81 that rotates downward. The door stopper 1 is made of, for example, steel, but may be made of resin.

[0020] The door stopper 1 comprises a support portion 2, a rotating shaft 3, and a hook portion 4. The support portion 2 is provided on the wall surface 9 facing the lever handle 81 when the door 8 is in the open position. The rotating shaft 3 is provided on the support portion 2. The hook portion 4 is rotatable around the rotating shaft 3. Hereinafter, the direction away from the wall surface 9 will be referred to as forward A, and the direction toward the wall surface 9 will be referred to as backward B.

[0021] As shown in Figures 2(a) and 2(b), the support section 2 has a flat mounting plate 21 that contacts the wall surface 9, and a pair of flat support plates 22 that stand upright from the mounting plate 21. The mounting plate 21 is fixed to the wall surface 9 by fixing fittings 23 such as anchor bolts. The pair of support plates 22 are spaced apart from each other. A rotating shaft 3 passes through the pair of support plates 22.

[0022] The rotating shaft 3 is, for example, a bolt and nut. The rotating shaft 3 is positioned rear B of the hook portion 42, which will be described later.

[0023] As shown in Figures 3(a), 3(b), and 4(a), the hook portion 4 has a guide portion 41, a hook portion 42, a contact portion 43, and a rear end notch portion 44. The hook portion 4 may further have a control portion 47. As shown in Figure 4(a), when the lever handle 81 passes below the guide portion 41 of the hook 4, the center of gravity of the hook portion 4 is positioned forward A of the rotation axis 3. Even if the guide portion 41 springs up higher than the lever handle 81, it is more preferable that the center of gravity of the hook portion 4 is positioned forward A of the rotation axis 3. In these cases, the hook portion 4, which has rotated upward, returns to its original position (horizontal state) by its own weight, and the lever handle 81 can be hooked onto the hook portion 42. The hook portion 4 is formed, for example, by processing a single steel plate. A washer may be provided between the hook portion 4 and the support plate 22 as needed.

[0024] The guide portion 41 is positioned forward A of the hook portion 42 and guides the handle portion 82 of the lever handle 81 to the hook portion 42. The guide portion 41 is formed with an inclination that curves when viewed from the side toward the rear B side. Alternatively, the guide portion 41 may be formed with an inclination that is straight when viewed from the side toward the rear B side.

[0025] The upper part of the guide portion 41 has a chamfered portion 46 formed on it.

[0026] The hook portion 42 is for hooking onto the handle portion 82 of the lever handle 81. The hook portion 42 has a first extension portion 42a extending upward from the lower end of the guide portion 41, a second extension portion 42b extending rearward B from the first extension portion 42a, and a third extension portion 42c extending downward from the second extension portion 42b. The first extension portion 42a extends vertically. The second extension portion 42b extends horizontally. The second extension portion 42b is positioned higher than the center of the rotation axis 3. The third extension portion 42c has a portion that extends vertically. Preferably, the third extension portion 42 has a notch 42d cut out on the lower side of this vertically extending portion. In the present invention, the notch 42d may be omitted.

[0027] The contact portion 43 is formed at the rear end of the hook portion 4 and is capable of contacting the mounting plate 21 of the support portion 2. That is, the contact portion 43 may contact the wall surface 9 via the support portion 2. As will be described later, the contact portion 43 may also be capable of directly contacting the wall surface 9. By the contact portion 43 contacting at least one of the support portion 2 and the wall surface 9, the guide portion 41 and the hook portion 42 of the hook portion 4 do not rotate downward around the rotation axis 3, and the horizontal state of the hook portion 4 can be maintained.

[0028] The rear end notch 44 is formed by cutting out the area above the contact portion 43. As a result, as shown in Figure 3(b), when the hook portion 4 rotates around the rotation axis 3, the contact portion 43 that was in contact with the mounting plate 21 of the support portion 2 separates from the mounting plate 21, allowing the guide portion 41 and the hook portion 42 of the hook portion 4 to rotate upward around the rotation axis 3.

[0029] The rear end notch 44 is formed inclined to curve forward A from the rear end of the hook portion 4 when viewed from the side. Alternatively, the rear end notch 44 may be formed inclined linearly from the rear end of the hook portion 4 towards A when viewed from the side.

[0030] The control unit 47 controls the upward rotation of the hook portion 42 to less than 90°. The control unit 47 may also control the upward rotation of the hook portion 42 such that the center of gravity of the hook portion 4 is positioned forward A of the rotation axis 3, by ensuring that the upper surface of the hook portion 4 is in contact with at least one of the support portion 2 and the wall surface 9. Because the center of gravity of the hook portion 4 is positioned forward A of the rotation axis 3, even when the contact portion 43 is separated from the mounting plate 21, the guide portion 41 and the hook portion 42 do not maintain an upright position, and gravity makes it easier for the guide portion 41 and the hook portion 42 to rotate downward. The control unit 47 is formed, for example, in the rear end notch 44.

[0031] Next, an example of the operation of the door stopper 1 in this embodiment will be described.

[0032] To keep the door open, the user first rotates the handle of the lever handle (not shown) downwards, pushing the door towards the wall. When pushing the door towards the wall, the handle of the lever handle is returned to its horizontal position.

[0033] As shown in Figure 4(a), the contact portion 43 is in contact with the mounting plate 21 of the support portion 2. That is, the hook portion 4 is in a horizontal position. The user then presses the handle portion 82 of the lever handle 81 against the guide portion 41 in a horizontal position. When the guide portion 41 and the handle portion 82 of the lever handle 81 come into contact, the angle θ1 between the tangent C between the guide portion 41 and the handle portion 82 of the lever handle 81 and the vertical line V is preferably, for example, 13° or more and 53° or less, and more preferably 20° or more and 50° or less.

[0034] As shown in Figure 4(b), since the rear end notch 44 is located above the contact portion 43, when the handle portion 82 is pressed against the guide portion 41, the contact portion 43 that was in contact with the mounting plate 21 of the support portion 2 separates from the mounting plate 21, and the guide portion 41 and hook portion 42 of the hook portion 4 rotate upward around the rotation axis 3.

[0035] Then, as shown in Figure 5(a), when the lower end of the guide portion 41 exceeds the handle portion 82 of the lever handle 81, the guide portion 41 and the hook portion 42 of the hook portion 4, which were rotating upward, rotate downward, and the handle portion 82 of the lever handle 81 is guided by the hook portion 42 by the guide portion 41.

[0036] Then, as shown in Figure 5(b), when the guide portion 41 and hook portion 42 of the hook portion 4 rotate downward and the contact portion 43 of the hook portion 4 contacts the mounting plate 21 of the support portion 2, the rotation of the hook portion 4 stops and the hook portion 4 returns to its initial horizontal position. When the contact portion 43 of the hook portion 4 contacts the mounting plate 21 of the support portion 2, the lever handle 81 is hooked onto the hook portion 42.

[0037] Here, the vertical length of the first extension portion 42a is longer than the vertical length of the handle portion 82. Therefore, when the lever handle 81 is hooked onto the hook portion 42, the hook portion 42 securely fastens the handle portion 82 compared to the case where the vertical length of the first extension portion 42a is shorter than the vertical length of the handle portion 82.

[0038] In this way, with the door stopper 1, simply by pressing the handle portion 82 against the hook portion 4 while keeping it horizontal, the handle portion 82 is guided from the guide portion 41 to the hook portion 42 and can be hooked onto the hook portion 42. As a result, the door can be kept open.

[0039] To release the door from its open position, rotate the handle portion 82 of the lever handle 81 downwards, as shown in Figure 6(a). This releases the hook portion 42 from locking the handle portion 82 in place.

[0040] Then, as shown in Figure 6(b), with the handle portion 82 of the lever handle 81 rotated downwards, the user pulls the lever handle 81 forward A to separate it from the door stopper 1. This releases the door from its open position.

[0041] According to this embodiment, the hook portion 4 is rotatable around a rotation axis 3. The hook portion 4 includes a hook portion 42 for hooking onto the handle portion 82 of the lever handle 81, a guide portion 41 positioned forward A of the hook portion 42 and for guiding the lever handle 81 to the hook portion 42, a contact portion 43 formed at the rear end and capable of contacting the support portion 2, and a rear end notch portion 44 cut out above the contact portion 43. Because the rear end notch portion 44 is located above the contact portion 43, when the handle portion 82 is pressed against the guide portion 41, the guide portion 41 and the hook portion 42 of the hook portion 4 can be rotated upward. The guide portion 41 of the hook portion 4, when rotated upward, guides the handle portion 82 in a horizontal position to the hook portion 42. Then, when the lower end of the guide portion 41 exceeds the handle portion 82 of the lever handle 81, the guide portion 41 and the hook portion 42 of the hook portion 4 rotate downward, and the handle portion 82 is hooked onto the hook portion 42 at the rear B of the guide portion 41. To release the door from its open position, the lever handle 81 is rotated downward and separated from the door stopper 1. This makes it easy to maintain and release the door from its open position.

[0042] Furthermore, according to this embodiment, the door stopper 1 has a contact portion 43 formed at the rear end and capable of contacting the support portion 2, and a rear end notch 44 cut out above the contact portion 43. As a result, elastic members such as coil springs for maintaining a horizontal position, as in the conventional method, are not required, thus reducing the number of components in the door stopper 1.

[0043] Furthermore, according to this embodiment, when the handle portion 82 is pressed against the guide portion 41, the hook portion 42 of the hook portion 4 can be rotated upward. Therefore, excessive force is suppressed when the handle portion 82 is pressed against the guide portion 41, thereby preventing damage to the door stopper 1.

[0044] According to this embodiment, when the guide portion 41 and the handle portion 82 of the lever handle 81 are in contact, the angle θ1 between the tangent C between the guide portion 41 and the handle portion 82 and the vertical line V is between 13° and 53°. This allows the guide portion 41 to guide the handle portion 82 smoothly. When the angle θ1 between the tangent C and the vertical line V is between 20° and 50°, the guide portion 41 to guide the handle portion 82 becomes even smoother.

[0045] According to this embodiment, a chamfered portion 46 is formed on the upper part of the guide portion 41. This helps to prevent injury even if a user comes into contact with the upper part of the guide portion 41.

[0046] In this embodiment, the vertical length of the first extension portion 42a is longer than the vertical length of the handle portion 82. Therefore, compared to the case where the vertical length of the first extension portion 42a is shorter than the vertical length of the handle portion 82, the hook portion 42 securely fastens to the handle portion 82.

[0047] Furthermore, according to this embodiment, the rotating shaft 3 is positioned to the rear B side of the hook portion 42. This reduces the amount of protrusion of the hook portion 4 from the wall surface 9.

[0048] In this embodiment, the vertical length of the first extension portion 42a is longer than the vertical length of the handle portion 82, and the rotation axis 3 is positioned to the rear B side of the hook portion 42. Even if the first extension portion 42a is made longer than the vertical length of the handle portion 82 in order to securely hook the lever handle 81, the length of the second extension portion 42b does not change, thus suppressing rattling when the door is open. In addition, the amount of protrusion of the hook portion 4 from the wall surface 9 can be minimized.

[0049] According to this embodiment, the second extension portion 42b is positioned higher than the center of the rotation axis 3. This allows for a reduction in the length of the guide portion 41 compared to the case where the second extension portion 42b is positioned lower than the center of the rotation axis 3. Therefore, the door stopper 1 can be further streamlined.

[0050] According to this embodiment, the center of gravity of the hook portion 4 is positioned forward A of the rotation axis 3. This makes it easier for gravity to rotate the guide portion 41 and the hook portion 42 downward, even when the contact portion 43 is separated from the mounting plate 21. Since the guide portion 41 and the hook portion 42 are not kept in an upright position, it is easier to maintain the horizontal position of the hook portion 4, making it easier to press the handle portion 82 against the guide portion 41.

[0051] According to this embodiment, the hook portion 4 has a control unit 47 that controls the upward rotation of the hook portion 42 to less than 90°. As a result, even when the contact portion 43 is separated from the mounting plate 21, the hook portion 4 is not kept in an upright position, and gravity makes it easier for the hook portion 42 to rotate downward. Since the guide portion 41 and the hook portion 42 are not kept in an upright position, it is easier to maintain the horizontal position of the hook portion 4, making it easier to press the handle portion 82 against the guide portion 41.

[0052] According to this embodiment, the third extension portion 42c extends vertically and has a notch 42d cut out on the lower side. This prevents the handle portion 82 from coming into contact with the third extension portion 42c when the handle portion 82 is hooked onto the hook portion 42. Therefore, damage to the handle portion 82 can be suppressed.

[0053] <Second Embodiment> Next, the door stopper 1 in the second embodiment will be described. Detailed explanations of the configuration, which is the same as in the embodiment described above, will be omitted below. As shown in Figure 7(a), in the door stopper 1, the first extension portion 42a is inclined forward A as it extends upward.

[0054] According to this embodiment, the first extension portion 42a is inclined forward A as it extends upward. This makes the hook portion 42 more secure in securing the handle portion 82.

[0055] <Third Embodiment> Next, the door stopper 1 in the third embodiment will be described. As shown in Figure 7(b), in the door stopper 1, the front A-side end 42e and the rear B-side end 42f of the second extension portion 42b are curved. End 42e is continuous with the upper end of the first extension portion 42a. End 42f is continuous with the upper end of the third extension portion 42c.

[0056] According to this embodiment, the front A-side end 42e and the rear B-side end 42f of the second extension portion 42b are curved. This prevents stress concentration at both ends 42e and 42f of the second extension portion 42b when a tensile force is applied from the handle portion 82 to the hook portion 4, thereby suppressing damage to the door stopper 1 (hook portion 4).

[0057] <Fourth Embodiment> Next, the door stopper 1 in the fourth embodiment will be described. As shown in Figure 8(a), in the door stopper 1, the contact portion 43 is in direct contact with the wall surface 9. As shown in Figure 8(b), the support portion 2 has a pair of mounting plates 21 spaced apart from each other. Each mounting plate 21 has one support plate 22 standing upright. The pair of support plates 22 are spaced apart from each other.

[0058] According to this embodiment, the hook portion 4 is rotatable around a rotation axis 3. The hook portion 4 includes a hook portion 42 for hooking the handle portion 82 of the lever handle 81, a guide portion 41 positioned forward A of the hook portion 42 and for guiding the lever handle 81 to the hook portion 42, a contact portion 43 formed at the rear end and capable of contacting the wall surface 9, and a rear end notch portion 44 cut out above the contact portion 43. Because the rear end notch portion 44 is located above the contact portion 43, when the handle portion 82 is pressed against the guide portion 41, the guide portion 41 and the hook portion 42 of the hook portion 4 can be rotated upward. The guide portion 41 of the hook portion 4, when rotated upward, guides the handle portion 82 in a horizontal position to the hook portion 42. Then, when the lower end of the guide portion 41 exceeds the handle portion 82 of the lever handle 81, the hook portion 42 of the hook portion 4 rotates downward, and the handle portion 82 is hooked onto the hook portion 42 at the rear B of the guide portion 41. To release the door from its open position, the lever handle 81 is rotated downward and separated from the door stopper. This makes it easy to hold and release the door from its open position.

[0059] Furthermore, according to this embodiment, the door stopper 1 has a contact portion 43 formed at the rear end that can contact the wall surface 9, and a rear end notch 44 that is cut out above the contact portion 43. As a result, a spring like the conventional one is not required when rotating the hook portion 4 or when maintaining a horizontal position. Therefore, the number of components in the door stopper 1 can be reduced.

[0060] Furthermore, according to this embodiment, when the handle portion 82 is pressed against the guide portion 41, the hook portion 42 of the hook portion 4 can be rotated upward. Therefore, excessive force is suppressed when the handle portion 82 is pressed against the guide portion 41, thereby preventing damage to the door stopper 1.

[0061] <Fifth Embodiment> Next, the door stopper 1 in the fifth embodiment will be described. As shown in Figure 9, in the door stopper 1, the hook portion 4 is formed in a plate shape and is provided in a pair. The upper ends of the pair of hook portions 4 are connected by a connecting portion 45. The connecting portion 45 is formed in a plate shape. The pair of hook portions 4 and the connecting portion 45 may be formed, for example, by bending a single steel plate.

[0062] While embodiments of the present invention have been described, these embodiments are presented as examples only and are not intended to limit the scope of the invention. Novel embodiments can be carried out in a variety of other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims and their equivalents. [Explanation of Symbols]

[0063] 1: Door stopper 2: Support part 21: Mounting plate 22: Support plate 23: Fixing hardware 3: Rotation axis 4: Hook part 41: Guide Section 42: Hook part 42a: 1st extension part 42b: 2nd extension part 42c: 3rd extension part 42d: Notch 43: Contact area 44: Rear end notch 45:Connection part 46: Chamfered section 47: Control Unit 8: Door 81: Lever handle 82:Handle 9: Wall surface θ1: angle

Claims

1. A door stopper that holds open a door having a lever handle that rotates downward, A support portion provided on the wall surface facing the lever handle when the door is in the open position, The rotating shaft provided in the support portion, It comprises a hook portion that can rotate around the aforementioned rotation axis, The aforementioned hook portion is A hook portion for securing the handle portion of the lever handle, A guide portion is positioned in front of the hook portion and guides the handle portion to the hook portion, A contact portion formed at the rear end and capable of contacting at least one of the wall surface and the support portion, It has a rear end notch that is cut out above the contact portion. A door stopper characterized by the following.

2. The center of gravity of the hook portion is positioned in front of the axis of rotation. A door stopper according to claim 1, characterized by the following:

3. When the guide portion and the handle portion are in contact, the angle between the tangent line between the guide portion and the handle portion and the vertical line shall be between 13° and 53°. A door stopper according to claim 1 or 2, characterized by the above.

4. The upper part of the guide portion is formed with a chamfered edge. A door stopper according to claim 1 or 2, characterized by the above.

5. The hook portion has a first extension portion that extends upward from the lower end of the guide portion. The first extension is inclined forward as it extends upward. A door stopper according to claim 1 or 2, characterized by the above.

6. The hook portion has a first extension portion that extends upward from the lower end of the guide portion. The vertical length of the first extension is longer than the vertical length of the handle. A door stopper according to claim 1 or 2, characterized by the above.

7. The hook portion has a first extension portion extending upward from the lower end of the guide portion, a second extension portion extending rearward from the first extension portion, and a third extension portion extending downward from the second extension portion. The front end and rear end of the second extension are curved. A door stopper according to claim 1 or 2, characterized by the above.

8. The hook portion has a first extension portion extending upward from the lower end of the guide portion, a second extension portion extending rearward from the first extension portion, and a third extension portion extending downward from the second extension portion. The second extension is positioned higher than the center of the rotation axis. A door stopper according to claim 1 or 2, characterized by the above.

9. The hook portion has a first extension portion extending upward from the lower end of the guide portion, a second extension portion extending rearward B from the first extension portion, and a third extension portion extending downward from the second extension portion. The third extension portion has a notch that is cut off on the lower side. A door stopper according to claim 1 or 2, characterized by the above.

10. The hook portion has a control unit that controls the upward rotation of the hook portion to less than 90°. A door stopper according to claim 1 or 2, characterized by the above.

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