Upper suspension means for pivot hinge device

Abstract

To provide upper suspension means for a pivot hinge device that enables workability and low cost while preventing falling of a swing door.SOLUTION: A pivot hinge device J for pivotally mounting a swing door D to a door frame W using an upper pivot shaft 15 and a lower pivot shaft 35 as support shafts comprises an upper support member 10 on which the upper pivot shaft 15 is provided, and a pull-out prevention member 20 for the upper pivot shaft 15. The pull-out prevention member 20 comprises a base body 21 and a pull-out prevention body 25. A holding portion 23b for the upper pivot shaft 15 is formed in the base body 21, and the pull-out prevention body 25 is provided so that the holding portion 23b can open and close freely. The pull-out prevention member 20 for the upper pivot shaft 15 protrudes from the swing door D and is positioned above the upper support member 10, allowing the upper support member 10 to support the pull-out prevention member 20 from below.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an upper suspending means constituting an upper hinge portion in a suspending device for suspending a hinged door to a door frame so that the door can rotate about pivot shafts provided in upper and lower hinge portions. [Background technology]

[0002] Conventionally, a pivot hinge type hinge device has been used as a hinge device for swing doors that takes appearance into consideration, in which the swing door is supported by pivot shafts provided on the upper and lower hinge sections and rotatably hung on the upper and lower corners of the door frame.

[0003] Regarding the above-mentioned shaft suspension device, the applicant has proposed a shaft suspension device that includes an upper suspension means having an upper hinge portion and a lower suspension means having a lower hinge portion, and that pivotally suspends a hinged door to a door frame so that the door can pivot around an upper pivot shaft provided in the upper hinge portion and a lower pivot shaft provided in the lower hinge portion.The upper suspension means includes a support attached to the door frame and on which the upper pivot shaft is provided, and a stopper for the upper pivot shaft provided on the upper edge of the hinged door.The stopper has a base and a stopper for preventing the upper pivot shaft from coming out.The base is formed with a holding portion for clamping the upper pivot shaft, and the stopper is provided so that the opening of the holding portion can be freely opened and closed (Patent Document 1).

[0004] Furthermore, there is a pivot hinge that comprises an upper door-side pivot and an upper frame-side pivot, as well as a lower door-side pivot and a lower frame-side pivot, and the pivots are allocated above and below the frame and the door hanging side, and the lower door-side pivot is fitted into the lower frame-side pivot, and the upper door-side pivot and the upper frame-side pivot are fitted together via the upper shaft, thereby allowing the door to be rotatably hung on the frame. The upper frame-side pivot is formed by placing a stepped upper shaft that has a large diameter portion at the tip and a small diameter portion at the base facing downward on the frame-side upper plate, and the upper door-side pivot is formed by placing a bearing member on the door-side upper plate, which has an approximately U-shaped groove with an inner diameter set in the small diameter portion and the large diameter portion within a vertical position range, and a cover member that can move in a direction to close the opening of the groove, and is connected in advance to the bearing member. After fitting the upper shaft into the approximately U-shaped groove of the bearing member, the cover member is rotated on a vertical plane to close the opening, allowing the door to be hung (Patent Document 2). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2023-31905 [Patent Document 2] Japanese Patent Application Laid-Open No. 2016-211199 Summary of the Invention [Problem to be solved by the invention]

[0006] However, when the overhead suspending means of the conventional shaft suspension device is used on an outdoor swing door, there is a risk that parts of the shaft suspension device will corrode, causing the swing door to fall. Furthermore, the conventional pivot hinges described above have an upper frame-side pivot formed by placing the upper shaft facing downward on the frame-side upper plate, and an upper door-side pivot formed by placing a bearing member on the door-side upper plate, so there is a risk that they may not be able to effectively prevent the door from falling if it is heavy.

[0007] The present invention has been made to solve the above problems, and its objective is to provide an overhead lifting means for a shaft lifting device that is easy to install and low cost, and that can prevent the swing door from falling. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention provides a door suspension device that includes an upper suspension means having an upper hinge portion and a lower suspension means having a lower hinge portion, and that pivotally suspends a door frame (which may also have a lower frame) having at least an upper frame, a left vertical frame, and a right vertical frame, with an upper pivot shaft (rotating shaft) provided in the upper hinge portion and a lower pivot shaft (rotating shaft) provided in the lower hinge portion as support shafts. The upper suspension means is a component of the door suspension device, and includes a support that protrudes from the left vertical frame or the right vertical frame, and has the upper pivot shaft provided with its tip facing upward, and a stopper for the upper pivot shaft provided on the upper edge of the swing door, and the stopper for the upper pivot shaft is made of a base and a stopper for the upper pivot shaft to prevent the upper pivot shaft from coming out. and a fall-out prevention body, wherein a holding portion for the upper pivot shaft is formed on the base, and the fall-out prevention body is provided so that (the entrance portion of) the holding portion can be opened and closed freely, the fall-out prevention device for the upper pivot shaft protrudes from the hinged door and is provided above the support device, and the support device is configured to support the fall-out prevention device for the upper pivot shaft from below, thereby performing a door fall-out prevention function, the upper pivot shaft is rotatably held in the holding portion, and the fall-out prevention body is movable into the holding portion when the lower pivot shaft enters the holding portion, and is provided so as to be able to restrict the lower pivot shaft from moving from the holding portion.

[0009] Here, this upper suspending means is a component of the axial suspension device, and the axial suspension device can adopt any appropriate structure as long as it is configured to axially suspend the hinged door so that it can be rotated around the door frame, using the upper and lower pivot axes provided on the upper and lower hinge portions of the upper suspending means and the lower suspending means as support axes. In particular, the suspension means may have any structure that can rotatably support the pivot shaft, and may be constructed by combining a vertical hole, a three-dimensional cam, a bearing, a recess, and other components.

[0010] There are also no restrictions on the shape of the door and door frame. Furthermore, the configurations of the upper and lower hinge portions and the pivot shafts, as well as the attachment positions of the upper and lower suspension means to the hinged door and door frame can also be determined appropriately.

[0011] Furthermore, the shapes of the support and stopper constituting the upper suspending means, as well as the shapes of the retaining portion and stopper body of the stopper, can be appropriately formed in a manner that achieves their respective functions and effects.

[0012] Furthermore, the fall-out prevention body must be configured so as to be able to freely restrict (restrict) the movement of the upper pivot shaft from the holding portion. For example, the pull-out prevention body is configured so that the entry portion of the upper pivot shaft into the holding portion can be opened and closed freely (opened and closed) (the body is provided with a biasing means for applying a biasing force in a direction to close the holding portion), and when the upper pivot shaft enters the holding portion, the entry portion of the holding portion can be released against the biasing force, and when the upper pivot shaft is positioned in the holding portion, the pull-out prevention body blocks the entry portion of the upper pivot shaft into the holding portion, and is configured so that the holding portion will not open unless an external force is applied, thereby inhibiting its movement, which is preferable because it can easily achieve its purpose.

[0013] The anti-pullout body must be configured so that the entry portion of the lower pivot shaft into the holding portion can be opened and closed freely, but various configurations can be used, such as making the anti-pullout body movable in the vertical direction (raising and lowering possible) or movable in the horizontal direction (movable).

[0014] In addition, the anti-pullout body is configured so that the entrance of the holding part can be opened and closed freely, but the holding part only needs to be configured so that it can be closed to the extent that the upper pivot shaft does not come out of the holding part when the hinged door is attached to the door frame.

[0015] In addition, the anti-pullout device for the upper pivot shaft may comprise a base having a hook-shaped portion, the inside of which serves as a retaining portion, and reinforcing plates provided on the upper and lower surfaces of the base to clamp the base, and an insertion groove for the anti-pullout body may be provided near the base end of the hook-shaped portion on the base, and a biasing means may be interposed in the insertion groove for the anti-pullout body, and the biasing means may be configured to apply a biasing force in a direction to push out the anti-pullout body. A reinforcing member may be provided to reinforce the holding portion of the upper pivot shaft. Preferably, the reinforcing member is provided along the inside portion (inner periphery) of the holding portion of the upper pivot shaft.

[0016] This upper lifting means comprises a support on which an upper pivot shaft is provided, and a stopper for the upper pivot shaft, and a stopper body is provided so that the holding portion formed on the base of the stopper can be opened and closed freely. Therefore, when attaching a hinged door equipped with a shaft tensioning device to a door frame or when removing the hinged door, the holding portion can be easily opened and closed by operating the anti-pullout body, allowing the upper pivot shaft to be inserted and removed, and when the insertion work is completed, the opening of the holding portion can be closed to prevent the upper pivot shaft from coming out.

[0017] Furthermore, the above-hanging means includes a support protruding from the left or right vertical frame and having an upper pivot shaft with its tip facing upward. The stopper for the upper pivot shaft protrudes from the hinged door and is located above the support, allowing the support to support the stopper for the upper pivot shaft from below (during normal use, the stopper for the upper pivot shaft is not placed on the support, but in the event of a problem, the stopper for the upper pivot shaft can be placed on the support), thereby providing a door-fall prevention function. Because the support can support the stopper for the upper pivot shaft from below, the door can be prevented from falling even if a malfunction occurs in the bottom-hanging means and the door can no longer be supported for some reason. Furthermore, because the support is attached to the left vertical frame or the like, rather than the top frame, the door can be reliably supported even if it is heavy. [Effects of the Invention]

[0018] According to the present invention, it is possible to provide an overhead suspending means for a shaft suspension device that is easy to install and low cost, and that can prevent the swing door from falling. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a side view showing a hinged door to which a shaft suspension device using the overhead suspension means of the present invention is attached. [Figure 2] 2(a) is a side view opposite to FIG. 1 showing a hinged door to which a shaft suspension device using the overhead suspension means of the present invention is attached, and FIG. 2(b) is a cross-sectional view taken along line XX in FIG. 2(a). [Figure 3] 1(a) and 1(b) are exploded perspective views showing an upper support member of the upper suspending means of the present invention. [Figure 4] 10 is an exploded perspective view of the stopper for the upper pivot shaft of the upper suspending means of the present invention, as viewed from above. FIG. [Figure 5] 10 is an exploded perspective view of the stopper for the upper pivot shaft of the upper suspending means of the present invention, as viewed from below. FIG. [Figure 6] FIG. [Figure 7] This is an enlarged cross-sectional view of a portion of the overhead lifting means during the installation work on the door frame of a swing door equipped with an axis suspension device using the overhead lifting means of the present invention, where (a) shows the state just before installation and (b) shows the state at the start of installation. [Figure 8] This is an enlarged cross-sectional view of a portion of the overhead lifting means during the installation work to the door frame of a swing door equipped with an axis suspension device using the overhead lifting means of the present invention, where (a) shows the time of installation and (b) shows the time of completion of installation. [Figure 9] This is an enlarged cross-sectional view of a portion of the overhead lifting means during the removal work from the door frame of a swing door equipped with an axis suspension device using the overhead lifting means of the present invention, where (a) shows the start of removal and (b) shows the end of removal. DETAILED DESCRIPTION OF THE INVENTION

[0020] An embodiment of the overhead suspending means will be described in detail below with reference to the drawings. In the description of the drawings, the same elements are given the same reference numerals, and duplicated explanations will be omitted. Furthermore, each component can be modified as appropriate, and explanations of detailed structures that are not directly related to the present invention will be omitted. In the following description, when referring to the left-right direction, reference is made to Fig. 1 (the door edge direction is the left direction, and the door tip direction is the right direction), and when referring to the front-rear direction, the front side of Fig. 1 is the front, and the depth direction is the rear. In addition, when describing the positional relationship with the hinged door D in describing each element and each member, the reference is made to the case where the hinged door D is attached to the door frame W and closed.

[0021] [Configuration of the main shaft fishing device] (1) Overall structure The shaft fishing device (hereinafter referred to as "the shaft fishing device J") that uses the upper hoisting means 5 as a component is a pivot hinge type shaft fishing device with a pair of upper and lower hinge parts. The shaft fishing device J has the upper hoisting means 5 that constitutes the upper hinge part and the lower hoisting means 6 that constitutes the lower hinge part (Figures 1 and 2).

[0022] On the other hand, the hinged door D, which is a rectangular door panel, is attached to a door frame W formed by an upper frame W1 and left and right vertical frames W2, W3 located at the top and left and right of the rectangular opening, and is hung by the main axis hanging device J so that it can be opened and closed. That is, the hinged door D is axially suspended by the main upper suspension means 5 at the upper corner of the left vertical frame W2 of the door frame W at the door end side, and by the lower suspension means 6 at the lower end.

[0023] In addition, mounting portions of a predetermined shape are formed near the upper corner of the upper end surface of the hinged door D [the mounting position of the stopper (hereinafter referred to as ``stopper 20'') for the upper pivot shaft 15 of the upper hanging means 5] and near the lower end of the lower end surface of the hinged door D [the mounting position of the lower shaft support portion 40 of the lower hanging means 6]. The hinged door D in this embodiment is a normally open type that is in an open state when not in use, but may also be a normally closed type.

[0024] (2) Configuration of the overhead suspension means The upper suspending means 5 includes an upper support member 10 provided with an upper pivot shaft 15, and a retaining member for the upper pivot shaft 15 (hereinafter referred to as a "retaining member 20") (Figs. 3 to 5).

[0025] The upper support device 10 has a frame body mounting portion 11 for mounting to the left vertical frame W2, a mounting portion for the upper pivot shaft 15 (hereinafter referred to as the "upper mounting portion 14"), and the upper pivot shaft 15. The frame mounting part 11 is a composite shape consisting of a rectangular plate 12 and a triangular plate 13, with an upper mounting part 14 provided horizontally on top of the triangular plate 13. The rectangular plate 12 is attached to the upper edge of the left vertical frame W2 with screws, and an upper pivot shaft 15 protrudes from the center of the upper mounting part 14 with its tip facing upward.

[0026] <Slip-out stopper> The anti-pullout device 20 mainly comprises a base body 21 made of synthetic resin or metal, two metal reinforcing plates 28A and 28B having the same shape (when viewed from above) as the base body 21, an anti-pullout body 25, and a coil spring 26 (a biasing member), with the base body 21 interposed between the upper and lower reinforcing plates 28A and 28B. Although the reinforcing plates 28A and 28B are attached to the base body 21 by a plurality of screws 29, the base body 21 and the reinforcing plates 28A and 28B may be formed integrally.

[0027] The base 21 is a thin plate-like member, and includes a rectangular plate-shaped mounting portion 22 and a hook-shaped portion 23 provided at the tip of the mounting portion 22. The end of the base 21 opposite the hook-shaped portion 23 is oriented toward the door edge, and is attached to the lower end surface of the hinged door D with screws (not shown).

[0028] The hook-shaped portion 23 has an opening 23a located at the door end side of the hinged door D, and the inside of the opening 23a serves as a holding portion (hereinafter referred to as "holding portion 23b") for the upper pivot shaft 15. An insertion groove 21a for a fall-out prevention body 25 is provided near the base end of the hook-shaped portion 23 (the boundary with the mounting portion 22 (base body 21)). An insertion shaft 21b for a coil spring 26 protrudes from the bottom of the insertion groove 21a. The hollow portion of the coil spring 26 is wound around the insertion shaft 21b, and the other end is inserted into a round hole 25b on the top surface of the fall-out prevention body 25 described below, so that the coil spring 26 applies a biasing force in a direction to push out the fall-out prevention body 25. The following slip-out prevention body 25 is slidably provided in the insertion groove 21a of the slip-out prevention body 25, and is capable of appearing and disappearing so that the opening 23a can be opened and closed (released and closed).

[0029] The fall-out prevention body 25 is a member provided to prevent the upper pivot shaft 15 from falling out of the holding portion 23b. The fall-out prevention body 25 has a shape in which a triangular prism (with a base that is a substantially right-angled isosceles triangle) shaped portion has been removed from the underside of the door trailing edge side from the overall substantially cubic shape, and is arranged so that the long side of the triangle faces away from the opening 23a (as viewed from above) and has an inclined surface that narrows towards the tip end so that the upper pivot shaft 15 can move so that it comes into contact with the fall-out prevention body 25 and forms the opening 23a when the upper pivot shaft 15 is attached.

[0030] The retaining portion 23b of the hook-shaped portion 23 is a space portion that abuts against the upper pivot shaft 15 and holds the upper pivot shaft 15, and a semicircular ring-shaped reinforcing body 24 (reinforcing member) is provided on the inner periphery of the retaining portion 23b to resist the abutment force of the upper pivot shaft 15.

[0031] The upper pivot shaft 15 moves through the opening 23a during installation, and is held by the holding portion 23b when installation is complete. That is, the pull-out prevention body 25 is movable (slidable) while sliding on the groove wall of the insertion groove 21a of the pull-out prevention body 25, and by closing the opening 23a which is the entrance of the holding portion 23b, the upper pivot shaft 15 is prevented from entering or exiting (hereinafter referred to as "entering, etc.") the holding portion 23b (the pull-out prevention body 25 is configured to be able to freely open and close the opening 23a which is the entrance of the upper pivot shaft 15 to the holding portion 23b). Note that a small gap shorter than the diameter of the upper pivot shaft 15 is formed in the holding portion 23b,

[0032] As described above, the stopper 20 protrudes from the hinged door D and is provided above the upper support member 10. The upper pivot shaft 15 is held by the holding portion 23b (base body 21) of the hook-shaped portion 23 of the stopper 20, so that in the unlikely event that the hanging means 6 is removed or other problems occur, the stopper 20 is supported by the upper mounting portion 14 (the stopper 20 is placed on the upper mounting portion 14). In this way, the upper support member 10 can support the stopper 20 from below, thereby achieving a door-fall prevention function.

[0033] (3) Configuration of the suspension means The hanging means 6 includes a lower support 30 provided with a lower pivot shaft 35, and a support portion for the lower pivot shaft 35 (hereinafter referred to as a "lower support portion 40") (Fig. 6). The lower support 30 has a frame body mounting portion 31 for mounting to the left frame W2, a base 32 on which a lower pivot shaft 35 is mounted, and the lower pivot shaft 35 itself. The frame mounting part 31 is a rectangular plate, and an L-shaped base 32 is provided on the side of the frame mounting part 31. The base 32 is composed of a right-angled pentagonal part 32a connected to the frame mounting part 31 and a protruding part 32b which is a horizontal surface formed by a semicircular part and a rectangular part. The frame mounting part 31 is attached to the lower edge of the left frame W2 with screws, and a lower pivot shaft 35 is provided in the center of the protruding part 32b of the base 32 so that its tip faces upward.

[0034] The lower support part 40 has a horizontal plate 41 and a bearing 42 provided at the tip of the horizontal plate 41. The horizontal plate 41 is generally L-shaped when viewed from above, with the tip formed in a slightly oblique shape, and the base end attached to the upper butt end surface of the left corner of the hinged door D. A round hole 41a is formed in the center of the other protruding side of the horizontal plate 41, and the bearing 42 is inserted into this round hole 41a. A washer 36 serving as height adjustment means is provided around the lower pivot shaft 35, and is interposed between the lower surface of the bearing 42. The horizontal plate 41 is formed with a plurality of elongated holes 41b for adjusting the left and right position. These holes are also mounting holes for the horizontal plate 21. Position adjustment means in the front-rear direction may be provided.

[0035] When the hinged door D is attached to the door frame W, the tip of the lower pivot shaft 35 can be inserted into the cylindrical portion inside the inner ring of the bearing 42, and the lower pivot shaft 35 is supported by the bearing 42 so that it can rotate freely.

[0036] [Method of attaching and detaching this shaft fishing device to the door frame] Next, we will explain how to attach and remove the main shaft fishing device J to the door frame W. In addition, the upper support 10 of the main upper hoisting means 5 in this shaft hoisting device J, and the lower support 30 (including the lower pivot shaft 35) and lower support portion 40 of the lower hoisting means 6 are attached to predetermined positions of the left vertical frame W2. In addition, the stopper 20 of the main upper hoisting means 5 is attached to the hinged door D.

[0037] (1) How to attach a swing door to a door frame First, the hinged door D is positioned in the range of 90 to 180 degrees (preferably 130 to 180 degrees) relative to the door frame W. The angle of the hinged door D relative to the door frame W is set as 0 degrees when the hinged door D is closed, and 180 degrees when the hinged door D is parallel to the door frame W. Then, in the above state, the lower pivot shaft 35 of the lower suspension means 6 of the main shaft fishing device J is inserted into the bearing 42, and the hinged door D is attached to the lower suspension means 6.

[0038] Next, the stopper 20 provided on the hinged door D is gradually moved toward the upper pivot shaft 15 from the opening 23a side of the base body 21 (FIG. 7(a)). At this time, the holding portion 23b of the removal prevention body 25 is almost closed by the biasing force of the coil spring 26. However, when the upper pivot shaft 15 abuts against the removal prevention body 25 (FIG. 7(b)), the pressing force moves and opens the removal prevention body 25, and the removal prevention body 25 is inserted into the holding portion 23b (FIG. 8(a)). Thereafter, the biasing force of the coil spring 26 returns the removal prevention body 25 to its original position, and the holding portion 23b is closed (FIG. 8(b)).

[0039] When the swing door D is attached to the main axis fishing device J, the weight of the swing door D acts in a direction that tilts the door edge downward, so that the upper pivot axis 15 abuts against the rear end of the holding portion 23ba (position of the reinforcement body 24) and is stably supported. As a result of the above, in the upper suspending means 5 of this shaft fishing device J, the stopper 20 is supported by the upper support member 10.

[0040] (2) How to remove the swing door from the door frame First, the removal prevention body 25 of the stopper 20 in the upper suspending means 5 is moved with a screwdriver S (FIG. 9(a)), the holding portion 23b is opened, and the upper pivot shaft 15 is pulled out from the holding portion 23b (FIG. 9(b)). When the screwdriver S is removed, the biasing force of the coil spring 26 causes the removal prevention body 25 to return to its original position, and the holding portion 23b is closed.

[0041] Next, the lower pivot shaft 35 in the lower suspension means 6 of the main shaft fishing device J is pulled out from the bearing 42 of the hinged door D, and the hinged door D is removed from the lower suspension means 6, thereby removing the hinged door D from the door frame W.

[0042] [Effects of the overhead lifting means] The overhead suspending means 5 includes an upper support 10 on which an upper pivot shaft 15 is mounted, and a stopper 20 for the upper pivot shaft 15, and is also provided with a pull-out prevention body 25 so that a holding portion 23b formed on a base 21 of the stopper 20 can be opened and closed. Therefore, when attaching a hinged door D equipped with a shaft suspension device J to a door frame W or when removing the hinged door D, the holding portion 23b can be easily opened and closed by operating the pull-out prevention body 25, allowing the upper pivot shaft 15 to be inserted and removed, and when the insertion operation is completed, the opening of the holding portion 23b can be closed to prevent the upper pivot shaft 15 from coming out.

[0043] In this way, by using the main overhead hoisting means 5, it is possible to realize a shaft hoisting device J with a simple structure. Also, since only the minimum necessary distance is provided between the upper support 10 of the main overhead hoisting means 5 and the hinged door D, it is possible to reduce scattering between the door frame W and the hinged door D.

[0044] Furthermore, this upper hanging means 5 is provided with a stopper 20 that protrudes from the left vertical frame W2 (right vertical frame W3) and has the upper pivot shaft 15 attached so that its tip faces upward, and the stopper 20 protrudes from the hinged door D and is provided above the upper support member 10. The upper pivot shaft 15 is held by the retaining portion 23b (base 21) of the hook-shaped portion 23 of the stopper 20, so that the upper support member 10 can support the stopper 20 from below, thereby providing a function to prevent the door from falling. In this way, the upper support device 10 can support the stopper 20 of the upper pivot shaft 15 from below, so even if a malfunction occurs in the hanging means 6 for some reason, the hinged door D can be prevented from falling. Also, because the upper support device 10 is attached to the left vertical frame W2 (right vertical frame W3) rather than the top frame W1, the hinged door D can be reliably supported even if it is heavy.

[0045] While one example of a preferred embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and appropriate design modifications are possible within the scope of the spirit of the present invention. Furthermore, the above invention-specific matters define the minimum necessary components, and other components may be added as long as they do not impair the effects of the invention.

[0046] Furthermore, the support and pivot shaft stopper (retaining portion and stopper body), which are components of the upper suspending means described in the claims, can be made of various components as long as they have the basic configuration and can achieve the same effects. Furthermore, the upper pivot shaft stopper and the support can be attached in various ways. [Explanation of symbols]

[0047] J shaft fishing device W door frame W2 left vertical frame D. Swing door 5. Suspension means 6. Hanging means 10 Upper support 15 Upper pivot axis 20 Stopper (stopper for upper pivot shaft) 21 Base 22 Mounting part 23 Unicum 23a opening 23b Holding part 24 Reinforcement body (reinforcement member) 25 Anti-slip body 26 Coil spring (biasing member) 30 Lower support 35 Lower pivot axis 40 Lower shaft support 42 bearings

Claims

1. The device is provided with an upper suspending means having an upper hinge portion and a lower suspending means having a lower hinge portion, The upper pivot shaft provided in the upper hinge portion and the lower pivot shaft provided in the lower hinge portion are used as support shafts to pivotally suspend a door frame having at least an upper frame, a left vertical frame, and a right vertical frame. The upper suspending means is a component of the suspending device, a support member that protrudes from the left vertical frame or the right vertical frame and has the upper pivot shaft provided with its tip facing upward, in the left vertical frame or the right vertical frame; a stopper for the upper pivot shaft provided at the upper edge of the hinged door, The retaining tool for the upper pivot shaft is a base body and a fall-out prevention body for the upper pivot shaft, The base body is formed with a holding portion for the upper pivot shaft, The pull-out prevention body is provided so that the holding portion can be opened and closed freely, An upper pivot shaft stopper protrudes from the hinged door and is provided above the support, and the support allows the upper pivot shaft stopper to be supported from below, thereby preventing the door from falling.This is an overhead lifting means for a shaft lifting device, characterized in that

2. The upper pivot shaft pull-out prevention body is The holding portion is provided with a biasing means for applying a biasing force in a direction to close the holding portion, The holding portion can be released when the upper pivot shaft enters the holding portion, 2. The overhead suspending means of a shaft suspending device according to claim 1, characterized in that the holding portion can be closed when the upper pivot shaft has finished entering the holding portion.

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