Door stopper for grating

Abstract

To provide a door stopper used for keeping a door, which opens / closes above a grating floor, in an open state, having a simple structure and a form suited to the grating floor.SOLUTION: A locking part 23 locking downward on a top surface of a grating floor 5 is integrated with a protrusion part 22, positioned on the grating floor 5 relative to an insertion part 21, of a main body part 2 having the insertion part 21 inserting from above into an opening 6a of a grating 6 constituting the grating floor 5. At least a portion of the insertion part 21 in an axial direction is formed so as to contact an inner peripheral face of the opening 6a in either a thickness direction or a width direction of the main body part 2.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a grating door stopper used to keep a door that opens and closes above a grating floor in an open position. [Background technology]

[0002] Door stoppers are installed on the floor to keep open a swing-type door that passes over the floor when opening and closing. Since they are installed so that the open door resists the restoring force of the door closer, a simple structure has a form that engages with the underside of the door when it is in the open state or the side of the door that is closing (see Patent Documents 1 to 3).

[0003] This type of door stopper is broadly divided into two types: a wedge-shaped type that is clamped between the floor and the underside of the door to keep the door open (Patent Documents 1 and 2), and a type that is fixed to the floor and has a contact part that can come into contact with the surface of the door's open side and a locking part that is journaled on the contact part and locks onto the back of the door's closed side when the door is open (Patent Document 3). The former example is easy to use as it can simply be placed on the floor, but the latter example has more parts than the former example.

[0004] On the other hand, if the floor is a grating floor made of grating, the grating has openings arranged in two horizontal directions, so it is necessary for the stopper not to fall through the openings, but a wedge-shaped door stopper is likely to fall.

[0005] Furthermore, while the grating has an opening, it needs to be thick enough to ensure strength and bending rigidity against vertical loads, but door stoppers that are fixed to the floor require additional ingenuity to accommodate the thickness of the grating.

[0006] As a fixing device specific to gratings, there is a form in which paired parts such as bolts and nuts are combined on the top and bottom of the grating (see Patent Documents 4 and 5). [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Microfilm of Japanese Utility Model Application Publication No. 55-156158 (Figures 1 and 2) [Patent Document 2] JP 2018-35523 A (Figs. 1 to 4) [Patent Document 3] JP 2018-178585 A (Figs. 1 to 5) [Patent Document 4] Japanese Patent Application Laid-Open No. 1-131310 (Figs. 1 to 4) [Patent Document 5] JP 2020-112009 A (Figs. 1 to 6) Summary of the Invention [Problem to be solved by the invention]

[0008] However, in the examples of Patent Documents 4 and 5, improvements to the door are required in order to use it as a stopper for a door passing over a grating, and even if the improvements are made, it is not as easy to handle and shape as a wedge-shaped door stopper.

[0009] In view of the above background, the present invention proposes a door stopper that has a simple structure and is suitable for use with a grating floor. [Means for solving the problem]

[0010] The grating door stopper according to claim 1 is a stopper for maintaining a door that opens and closes on a grating floor in an open state, The structural requirements are that the device comprises a main body having an insertion portion that is inserted from above into the opening of the grating that constitutes the grating floor, and a locking portion that is integrated with a protrusion of the main body that is located on the grating floor from the insertion portion and that locks downward onto the upper surface of the grating floor.

[0011] As shown in Figures 2 and 3, the grating 6 is composed of a plurality of bearing bars 61 arranged in parallel at intervals across its width, and a plurality of twist bars 62 oriented perpendicular to the axial direction of the bearing bars 61 and arranged in parallel at intervals across the axial direction of the bearing bars 61.

[0012] The twist bar 62 is joined to the bearing bar 61, and the area defined by adjacent bearing bars 61, 61 and adjacent twist bars 62, 62 becomes the opening 6a. The upper surface (upper end) of the twist bar 62 is aligned with the upper surface (upper end) of the bearing bar 61. The bearing bar 61 may be I-shaped or flat bar shaped.

[0013] End plates 63 are arranged parallel to the twist bars 62 at both axial ends of the bearing bar 61 and are joined to the ends of the bearing bar 61. The grating floor 5 mainly refers to the surface of a floor (deck slab) that is composed of multiple gratings 6 arranged in two directions on a plane, but it can also be composed of a single grating 6.

[0014] "A main body having an insertion part that is inserted from above into an opening in the grating" means that, as shown in Figure 2, a part of the lower side of the main body 2 of the door stopper 1 is inserted from above into the opening 6a of the grating 6, forming the inserted insertion part 21. The insertion part 21 is inserted upward into the opening 6a in a removably manner. The part of the main body 2 above the insertion part 21 and located on the grating floor 5 forms the protrusion 22.

[0015] When the insertion portion 21 is inserted into the opening 6a and the main body 2 stops the open door 7, the restoring force of the door closer must prevent the insertion portion 21 from moving horizontally or tipping over within the opening 6a in order for the main body 2 to function as the door stopper 1. To achieve this, it is appropriate for the insertion portion 21 to have a cross-sectional shape that prevents horizontal movement beyond a certain level in at least one of the thickness direction and width direction of the main body 2.

[0016] Specifically, as shown in Figures 4 and 5, at least a portion of the insertion portion 21 in the axial direction (expanded diameter portion 21a) is shaped so as to be able to contact the inner peripheral surface of the opening 6a in at least one of the thickness direction and width direction of the main body portion 2 (claim 2). Figure 4 shows an example where the entire length of the insertion portion 21 can contact the inner peripheral surfaces of the opening 6a on both sides in the width direction within the opening 6a, and Figure 5 shows an example where only a portion of the insertion portion 21 in the axial direction can contact the inner peripheral surfaces of the opening 6a on both sides in the width direction.

[0017] More specifically, it is desirable that the insertion portion 21 has a cross-sectional shape that can be inscribed in the opening 6a of the grating 6, but the cross-sectional shape of the insertion portion 21 is not limited, and it can be square, circular, polygonal, etc. The "cross-sectional shape that can be inscribed in the opening" is sufficient as long as both side surfaces of at least one of the thickness direction and width direction of the main body portion 2 can be inscribed in the inner peripheral surface of the opening 6a. "The insertion portion having a cross-sectional shape that can be inscribed in the opening of the grating" is an example of "the insertion portion having a cross-sectional shape that prevents a part of the axial direction of the insertion portion (expanded diameter portion 21a) from horizontally moving beyond a certain amount in the thickness direction, etc. of the main body portion" (Claim 2).

[0018] The phrase "capable of contacting the inner peripheral surface of the opening 6a" refers to a state in which the surface of the insertion portion 21 and the inner peripheral surface of the opening 6a are close enough to ensure a slight clearance of a few millimeters or less between the surface of the insertion portion 21 and the inner peripheral surface of the opening 6a. In this case, the insertion portion 21 can come into contact with the interior of the opening 6a, thereby also functioning to prevent horizontal movement of the door stopper 1 when it is installed.

[0019] Therefore, if the insertion portion 21 has a cross-sectional shape that can be inscribed in the opening 6a, there is no need to form a locking portion 23 in the thickness direction or width direction of the main body portion 2 to ensure stability against horizontal movement or tipping of the insertion portion 21, and as described below, the locking portion 23 only needs to serve the purpose of setting the insertion depth of the insertion portion 21.

[0020] For example, in order to prevent a portion of the axial direction of the insertion portion 21 (expanded diameter portion 21a) from causing horizontal movement in the width direction or tipping over of the grating 6 (bearing bar 61) within the opening 6a, the expanded diameter portion 21a only needs to be thick enough to fit within the width dimension of the opening 6a, so as shown in Figure 5, the insertion portion 21 (main body portion 2) excluding the expanded diameter portion 21a may be rod-shaped or have other shapes with a cross-sectional area (thickness) that leaves a gap between it and the inner surface of the opening 6a so that it does not come into contact with it.

[0021] When the insertion portion 21 excluding the enlarged diameter portion 21a is rod-shaped or the like, if a pair of locking portions 23, 23 are arranged on both sides of the width direction of the main body portion 2 (protruding portion 22) in the length direction of the opening 6a (bearing bar 61) (claim 3), the effect of suppressing or preventing horizontal movement in the width direction and tipping of the main body portion 2 is increased. Even if the locking portions 23, 23 are not arranged on both sides of the main body portion 2 (protruding portion 22), horizontal movement and tipping of the main body portion 2 are suppressed or prevented by the use of frictional force as long as the outer peripheral surface of the insertion portion 21 is in contact (close contact) with the inner peripheral surfaces on both sides of the width direction of the opening 6a.

[0022] The locking portion 23 may be positioned on at least one thickness-wise side or at least one width-wise side of the protrusion 22 depending on the resting position of the door 7 in the open state, but in order to increase stability against horizontal movement, etc. when the main body portion 2 (insertion portion 21) is inserted into the opening 6a, it is reasonable for the locking portion 23 to be formed or joined on both thickness-wise or both width-wise sides of the protrusion 22 (Claim 3).

[0023] In addition, when the locking portions 23 are arranged on both sides in the width direction or both sides in the thickness direction of the main body 2 (protruding portions 22) (claim 3), the frictional force generated between the locking portions 23 and the grating 6 may be expected to suppress horizontal movement, depending on the material of the locking portions 23. Therefore, in order to ensure horizontal movement and stability against tipping over when the insertion portion 21 is inserted into the opening 6a, it is not necessarily essential that the insertion portion 21 has a shape that allows part of its axial direction to come into contact with the inner peripheral surface of the opening 6a.

[0024] The "locking portion that locks downward onto the upper surface of the grating floor" in claim 1 refers to the locking portion 23 that locks downward onto the bearing bar 61 or twist bar 62 when the main body 2 (insertion portion 21) of the door stopper 1 is inserted into the opening 6a, and that sets the insertion depth of the main body 2 into the opening 6a, being integrated around the protrusion 22. "Integrated" includes cases where the locking portion 23 is integrally formed as part of the protrusion 22 and cases where it is integrally joined to the protrusion 22. It also includes cases where the locking portion 23 is part of the main body 2 as shown in Figure 6.

[0025] The locking portion 23 not only determines the insertion depth of the insertion portion 21 into the opening 6a, but also serves to ensure stability against tilting (overturning) of the main body portion 2 when the insertion portion 21 is inserted into the opening 6a and against the horizontal movement described above by contacting the upper surface (grating floor 5) of the grating 6 on the outer periphery of the main body portion 2 (protrusion 22).

[0026] The direction of the restoring force acting on the door 7 in the closing direction differs depending on whether the door stopper 1 stops the door 7 in a position close to the fully open state or in a position closer to the closed state. Depending on this difference in direction, the direction acting on the insertion portion 21 in the opening 6a differs, and the component that is larger, the length direction or the width direction of the opening 6a, differs. In this relationship, it can be said that the acting direction of the restoring force determines whether the engaging portion 23 should be disposed in the thickness direction or the width direction of the protruding portion 22, and therefore the position of the engaging portion 23 on the protruding portion 22 may be determined in advance.

[0027] However, as shown in Figure 4, as long as either side of the insertion portion 21 in the thickness direction can come into contact with the inner surface of the opening 6a when the insertion portion 21 is inserted into the opening 6a or when the main body portion 2 attempts to tilt in the thickness direction, it is not necessarily necessary to arrange the locking portions 23 on both sides of the protrusion 22.

[0028] When the side surface in the thickness direction of the insertion portion 21 contacts the inner peripheral surface of the opening 6a, at least a part of one side surface of the upper part of the insertion portion 21 contacts the upper part of the bearing bar 61 on that side, and at least a part of the other side surface of the lower part of the insertion portion 21 contacts the lower part of the bearing bar 61 on that side. In this case, the depth of the insertion portion 21 has a size equivalent to the height of the bearing bar 61.

[0029] From this point of view, when the thickness-wise side of the insertion portion 21 contacts the inner surface of the opening 6a, the locking portion 23 mainly serves to set the insertion depth of the insertion portion 21 into the opening 6a, so it is sufficient that it is formed on at least one of the thickness-wise or width-wise sides of the protrusion 22.

[0030] As described above, the door stopper 1 only has two or three parts: the main body 2 having the insertion part 21 that is inserted into the opening 6a of the grating 6 and the protrusion 22 that is located above the grating floor 5 from the insertion part 21; and the locking part 23 that is integrated with the protrusion 22 and locks onto the upper surface of the grating floor 5. Since it does not need to be joined to the grating 6, it has a simple structure but a form that is suitable for the grating floor 5.

[0031] A cushioning material 3 made of rubber, synthetic resin or the like may be attached, for example, by being stuck or wrapped around the portion of the protrusion 22 that comes into contact with the side surface of the door 7 when the door 7 is in the open state, to protect the protrusion 22 from the restoring force of the door 7 when it is about to be closed or from the impact caused by the restoring force (claim 4). The cushioning material 3 may also be stuck to the outer peripheral surface of the insertion part 21 when the insertion part 21 may come into contact with the inner peripheral surface of the opening 6a.

[0032] When the cushioning material 3 is attached to the protrusion 22, if the cushioning material 3 is attached evenly around the protrusion 22 with respect to the center of the horizontal cross section of the main body 2, the center of gravity due to the mass of the entire cushioning material 3 will be located at the center of the horizontal cross section of the main body 2, and the cushioning material 3 will contribute to improving the stability of the main body 2 (door stopper 1) against tipping over.

[0033] In addition, a handle 4 may be attached to the upper end of the main body 2 (protrusion 22) or other part that does not come into contact with the door 7 when the door is in the open state, for the convenience of carrying, setting up, and retrieving the door stopper 1 itself (claim 5).

[0034] In particular, if the handle 4 is attached to the upper end of the main body 2 (protrusion 22) and the center of gravity due to the mass of the handle 4 is located at the center of the horizontal cross section of the main body 2, the same can be said as for the cushioning material 3 described above, and therefore the mass of the handle 4 added to the mass of the main body 2 contributes to improving the stability of the main body 2 (door stopper 1) when installed. [Effects of the Invention]

[0035] The door stopper has two or three parts: a main body with an insertion part that is inserted into the opening of the grating and a protrusion that is positioned above the grating floor from the insertion part, and a locking part that is integrated with the protrusion of the main body and locks onto the top surface of the grating floor.Since it is not joined to the grating, it has a simple structure but can be used as a door stopper suitable for grating floors. [Brief explanation of the drawings]

[0036] [Figure 1] FIG. 10 is a perspective view showing an example of a door stopper having a cushioning material and a handle attached thereto. [Figure 2] 2 is a longitudinal cross-sectional view of the grating in the length direction, showing the state when the door stopper shown in FIG. 1 is installed on the grating floor. FIG. [Figure 3] 1A is a perspective view including a grating showing how the door stopper shown in FIG. 1 installed on the grating floor holds the open door in the open position, and FIG. 1B is a perspective view showing the door shown in FIG. 1A in the closed position. [Figure 4] This is a vertical cross-sectional view showing an example of manufacturing a door stopper in which the insertion portion of the main body is shaped so that it can be inscribed in the opening of the grating. [Figure 5]FIG. 10 is a vertical cross-sectional view showing an example of manufacturing a door stopper in which the main body (insertion portion) excluding the enlarged diameter portion is rod-shaped with a cross-sectional area that creates a gap between it and the inner peripheral surface of the opening. [Figure 6] 10 is a vertical cross-sectional view showing an example of manufacturing a door stopper in which the locking portion is part of the main body portion. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0037] Figure 1 shows an example of a manufactured door stopper 1 that has a main body 2 with an insertion part 21 that is inserted from above into opening 6a of grating 6 that constitutes grating floor 5, and a locking part 23 that is integrated with a protrusion 22 of main body 2 that is located above grating floor 5 from insertion part 21 and locks downward onto the upper surface of grating floor 5. Figure 2 shows the door stopper 1 in use, keeping door 7 open, but door stopper 1 is removably installed on grating floor 5 to keep door 7 open, which opens and closes in a swing-door style over grating floor 5.

[0038] The door stopper 1 shown in Figures 1 and 2 shows an example of a manufacturing process in which a cushioning material 3 is attached to the part of the protrusion 22 that comes into contact with the side of the closed side (indoor side) of the door 7 when it is in the open state, and a handle 4 is attached to the part of the protrusion 22 that does not come into contact with the door 7 when it is in the open state.

[0039] The main body 2, which has the insertion portion 21 and the protrusion 22 on one side, and the engaging portion 23 that is integrated with it, are made from, for example, steel or hard plastic, but the material is not important as long as it has enough weight to easily move horizontally and not tip over when installed (in use).

[0040] When the main body 2 is made of steel, the buffer material 3 is adhered to the main body 2 with an adhesive or the like, and the handle 4 is joined to the main body 2 by welding or the like. In Figures 1 and 2, a flat bar is used for the main body 2, but angle iron is used for the locking part 23, and the locking part 23 is joined to the main body 2 with a bolt 23a and a nut 23b. There are two main width dimensions of the opening 6a (the distance between the twist bars 62, 62), and depending on each width dimension, the thickness when a flat bar is used or the diameter when a reinforcing bar, described below, is set.

[0041] 1 and 2, the cushioning material 3 is wrapped evenly around the entire upper periphery of the main body 2 (protruding portion 22) so that the center of gravity of the entire cushioning material 3 is located on the center of gravity of the main body 2 and the main body 2 is stable against tipping over. For the same reason, the handle 4 is joined to the upper end surface of the main body 2 (protruding portion 22) so that the center of gravity of the handle 4 is located on the center of gravity (center on a plane) of the main body 2. In order to position the center of gravity of the main body 2 on the center on a plane, it is desirable that the main body 2 have a regular shape, such as a rectangular cross-sectional shape.

[0042] 3-(a) shows the state when the door stopper 1 is installed on the grating floor 5, the insertion part 21 of the main body part 2 is inserted into the opening 6a of the grating 6, the closed side of the door 7 that is open on the grating floor 5 is in contact with the surface of the buffer material 3, and the door stopper 1 is maintaining the door 7 in the open state. (b) shows the door stopper 1 in the installed state when the door 7 shown in (a) is closed.

[0043] As shown in Figure 3-(b), if the door stopper 1 is installed in the opening 6a when the door 7 is closed and in use, the door stopper 1 is lifted from the opening 6a when the door 7 is opened, and then installed in the opening 6a after the door 7 has passed the open position. When the door 7 is closed, the door stopper 1 may be installed in some other location. The grating 6 is made up of bearing bars 61 arranged in parallel and twist bars 62 arranged in a direction perpendicular to the bearing bars 61, and the area surrounded by adjacent bearing bars 61, 61 and adjacent twist bars 62, 62 forms the opening 6a.

[0044] In the example shown in Figure 2, when the insertion portion 21 is inserted into the opening 6a, there is a small clearance of a few millimeters or less between the surface of the insertion portion 21 and the bearing bar 61 in the thickness direction (width direction of the opening 6a) of the main body portion 2, which is a flat bar, and this clearance allows the insertion portion 21 to move slightly horizontally within the opening 6a in the thickness direction of the main body portion 2.

[0045] In contrast, Figure 4 shows an example in which the flat bar main body 2 including the insertion portion 21 is formed with a cross-sectional shape that prevents horizontal movement of the insertion portion 21 beyond a certain level in at least one of the thickness and width directions of the main body 2 within the opening 6a. Figure 4 particularly shows an example in which the entire axial length of the insertion portion 21 is formed in a shape that almost makes contact with the inner circumferential surface of the opening 6a (grating 6) in the width direction of the opening 6a. In this example, both side surfaces of the insertion portion 21 in the thickness direction almost or completely make contact with the thick portions (head and foot portions) of the bearing bars 61, 61.

[0046] To prevent the insertion portion 21 from moving horizontally in the thickness or width direction of the main body portion 2 within the opening 6a, at least a portion (one section) of the axial direction of the insertion portion 21 should be shaped so that it can contact the inner surface of the opening 6a in the thickness or width direction of the main body portion 2.

[0047] 5 shows an example in which a rod-shaped material such as rebar or steel bar is used for the main body 2. Here, an expanded diameter portion 21a having a large cross-sectional area in a direction perpendicular to the axis is formed or connected to a part of the axial direction of the insertion portion 21 located inside the opening 6a of the main body 2, and the surface of the expanded diameter portion 21a is formed in a shape that can contact the inner peripheral surfaces of the bearing bars 61, 61 that are adjacent in the width direction of the opening 6a and that make up the opening 6a. In this case, the expanded diameter portion 21a contacts the thick-walled portions (head and foot portions) or thin-walled portions (waist portions) of the bearing bars 61, 61.

[0048] 5 shows an example in which expanded diameter portion 21a, which has a thickness (diameter) larger than the thickness (diameter) of main body portion 2, is connected to main body portion 2 with nut 21b. According to the above concept, since it is sufficient that at least a portion of insertion portion 21 has a shape that allows it to contact the inner circumferential surface of opening 6a, the shape (cross-sectional shape) of main body portion 2 is arbitrary, and it may be a plate shape as shown in FIG. 2 or a thin plate shape other than a rod shape as shown in FIG.

[0049] Figure 5 also shows an example in which arranging the locking portion 23 on at least one side in the width direction of the main body portion 2 (protruding portion 22) is expected to suppress or prevent horizontal movement in the width direction of the main body portion 2 and tipping over. The "width direction of the main body portion 2" here refers to the length direction of the opening 6a (grating 6). The locking portion 23 locks downward onto the bearing bar 61 or twist bar 62 when the main body portion 2 (insertion portion 21) is inserted into the opening 6a.

[0050] In particular, if the locking portions 23, 23 are arranged in pairs on both sides of the width of the main body 2 (protruding portion 22), the frictional force with the grating floor 5 increases, thereby increasing the effect of suppressing horizontal movement of the main body 2 in the width direction. In this case, the presence of the locking portions 23, 23 on both sides of the width of the main body 2 also increases stability against tipping in the width direction. Furthermore, regardless of the shape (cross-sectional shape) of the main body 2 as shown in Figure 5, if the locking portion 23 has a length that extends from the main body 2 in the width direction of the opening 6a, the extending portion of the locking portion 23 from the main body 2 also serves to increase stability against tipping of the main body 2 in the width direction of the opening 6a.

[0051] 6 shows an example of a main body 2 manufactured in such a way that the locking portion 23 is integrally formed with or integrally joined to the protruding portion 22 as part of the protruding portion 22 that protrudes from the opening 6a when the insertion portion 21 is inserted into the opening 6a. Here, the locking portion 23 is formed in a shape and size such that the lower end of the locking portion 23 rests exactly on the adjacent bearing bars 61, 61, but the shape and size of the locking portion 23 are not important. The relationship between the insertion portion 21 and the bearing bars 61, 61 that make up the opening 6a in this example is the same as in the example of FIG. 2. [Explanation of symbols]

[0052] 1...door stopper, 2...Main body portion, 21...Insertion portion, 21a...Expansion portion, 21b...Nut, 22...Protrusion portion, 23...Engagement portion, 23a...Bolt, 23b...Nut, 3...Buffer material, 4...handle, 5...Grating floor, 6...Grating, 61...Bearing bar, 62...Twist bar, 63...End plate, 6a...Opening, 7...door.

Claims

1. A stopper for keeping the door that opens and closes on the grating floor in an open position. A grating door stopper characterized by comprising: a main body having an insertion portion that is inserted from above into the opening of the grating that constitutes the grating floor; and a locking portion that is integrated with a protrusion of the main body that is located on the grating floor from the insertion portion and that locks downward onto the upper surface of the grating floor.

2. A door stopper for a grating as described in claim 1, characterized in that at least a portion of the axial direction of the insertion portion is shaped so that it can contact the inner surface of the opening in at least one of the thickness direction and width direction of the main body portion.

3. 2. The door stopper for a grating according to claim 1, wherein the locking portions are arranged on both sides of the protrusion in the thickness direction or on both sides of the protrusion in the width direction.

4. 4. A door stopper for a grating according to claim 1, wherein a cushioning material is attached to the protrusion at a portion where the side of the door comes into contact when the door is in an open state.

5. 4. A door stopper for a grating according to claim 1, wherein a handle is attached to the protrusion at a portion that does not come into contact with the door when the door is in an open state.

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