Pivot device

Abstract

To provide a pivot device having a simple configuration capable of shortening a setback dimension as much as possible and preventing a hinged door from falling off.SOLUTION: A pivot device J pivots a hinged door D in a door frame W in a rotatable manner, using an upper pivot shaft 15 and a lower pivot shaft 35 as support shafts. An upper pivotally-supporting part 5 includes an upper support part 10 and an upper bearing part 20 of the upper pivot shaft 15. A lower pivotally-supporting part 6 includes a lower support part 30 on which the lower pivot shaft 35 is provided, and a fall-off stopping tool 40 of the lower pivot shaft 35. The fall-off stopping tool 40 of the lower pivot shaft 35 includes a base body 41 and a fall-off preventing body 45 of the lower pivot shaft 35. The lower pivot shaft 35 is held in a freely rotatable manner by a holding part 41a of the base body 41. The fall-off preventing body 45 is provided such that a movement of the lower pivot shaft 35 from the holding part 41a can be restricted.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a pivoting device for pivotally supporting a hinged door to a door frame using pivot shafts provided on upper and lower support sections as support shafts. [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 upper and lower support parts 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 an upper suspension means having an upper hinge portion and a lower suspension means having a lower hinge portion, which rotatably suspends a hinged door to a door frame using an upper pivot shaft provided in the upper hinge portion and a lower pivot shaft provided in the lower hinge portion as support shafts. 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). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2023-31905 Summary of the Invention [Problem to be solved by the invention]

[0005] When hanging a swing door on a door frame using a conventional pivot suspension device, the lower pivot shaft is attached to the door frame, and then the upper pivot shaft is inserted into the retaining portion of the upper support part and held in place by the anti-slip body. However, in this case, a "gap dimension" (the dimension of the gap between the door frame and the swing door) greater than the length of the upper pivot shaft is required, which has the problem of making the design look unattractive. On the other hand, in order to address this issue and shorten the clearance dimension, it was necessary to form a guide groove for the upper pivot shaft at a specified position on the end surface of the door at the end of the swing door, which made the processing complicated.

[0006] Furthermore, when the overhead suspending means of a conventional overhead suspending device is used on an outdoor swing door, there is a risk that parts of the shaft suspending device may corrode, causing the swing door to fall.

[0007] The present invention has been made to solve the above problems, and its objective is to provide a shaft suspension device that has a simple structure, allows the door dimensions to be as short as possible, and prevents the door from falling. [Means for solving the problem]

[0008] In order to achieve the above object, the pivoting device of the present invention (hereinafter, the present invention may be referred to as "this pivoting device") pivots the swing door to a door frame (which may be provided with 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 on an upper shaft support portion at the upper end of the swing door and a lower pivot shaft (rotating shaft) provided on a lower shaft support portion at the lower end of the swing door as support shafts, the upper shaft support portion is provided with a support portion that protrudes from the upper frame, the left vertical frame, or the right vertical frame, and the upper pivot shaft is provided with a tip that faces upward, and a support portion for the upper pivot shaft that protrudes from the swing door and is provided above the support portion, and supports (pivots) the upper pivot shaft, and the support portion In this door, the support portion of the upper pivot shaft can be supported from below, thereby providing a door-fall prevention function, and the lower shaft support portion is attached to the floor surface on which the left vertical frame, the right vertical frame or the door frame is provided, and is equipped with a support portion on which the lower pivot shaft is provided, and a stopper for the lower pivot shaft provided on the lower edge of the hinged door, and the stopper for the lower pivot shaft has a base and a stopper body for preventing the lower pivot shaft from falling out, and the base is formed with a holding portion for holding the lower pivot shaft, the lower pivot shaft is rotatably held in the holding portion, and the stopper 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 out of the holding portion.

[0009] In addition, this pivoting device pivots the swing door to a door frame (four-sided frame) having at least an upper frame, a lower frame, a left vertical frame, and a right vertical frame, with an upper pivot shaft (rotating shaft) provided on an upper shaft support portion at the upper end of the swing door and a lower pivot shaft (rotating shaft) provided on a lower shaft support portion at the lower end of the swing door as support shafts, and the upper shaft support portion is provided with: a support portion that protrudes from the upper frame, the left vertical frame, or the right vertical frame, and the upper pivot shaft is provided with its tip facing upward; a support portion for the upper pivot shaft attached to the swing door; and a support portion for the upper pivot shaft that protrudes from the swing door and is provided above the support portion, and supports the upper pivot shaft; In this door, the support portion of the upper pivot shaft can be supported from below, thereby providing a door-fall prevention function, and the lower shaft support portion is attached to the lower frame and includes a support portion on which the lower pivot shaft is provided, and a stopper for the lower pivot shaft provided on the lower edge of the hinged door, and the stopper for the lower pivot shaft has a base and an anti-dropout body for preventing the lower pivot shaft from falling out, and the base is formed with a holding portion for holding the lower pivot shaft, the lower pivot shaft is rotatably held in the holding portion, and the anti-dropout body is movable into the holding portion when the lower pivot shaft enters the holding portion, and is arranged to be able to restrict the lower pivot shaft from moving out of the holding portion.

[0010] Furthermore, if the upper support portion is attached to the left or right vertical frame rather than the upper frame, it is preferable because this allows the swing door to be supported more stably even if it is heavy.

[0011] Here, this pivoting device can adopt any appropriate structure as long as it is configured to pivot the swing door to the door frame in a rotatable manner, using an upper pivot shaft provided on the upper support portion at the upper end of the swing door and a lower pivot shaft provided on the lower support portion at the lower end of the swing door as support shafts.

[0012] There are also no restrictions on the shape of the door and door frame. Furthermore, the upper and lower pivotal support portions (hereinafter collectively referred to as "both pivotal support portions"), as well as the attachment positions of both pivotal support portions to the hinged door and door frame, can also be determined appropriately.

[0013] Furthermore, the upper pivot shaft and the lower pivot shaft are shaft-shaped members, and there are no limitations on the shape thereof. However, the lower pivot shaft bears the weight of the swing door and is repeatedly subjected to frictional force during opening and closing. Therefore, a hardened pin is preferable to reduce wear. Furthermore, it is even more preferable to provide a hardened steel ball at the tip of the pin to reduce wear and ensure smooth swing of the swing door.

[0014] Furthermore, in the upper support portion, the upper pivot shaft must be configured to be supported at the support portion of the upper pivot shaft, but various methods can be used to support the upper pivot shaft, such as a structure in which a bush or bearing is provided in a vertical hole.

[0015] In addition, the shapes of the support portion and anti-pullout device that constitute the lower support portion, the shape of the holding portion and anti-pullout body of the anti-pullout device, and the shape of the holding portion for holding the lower pivot shaft can be appropriately formed in a manner that achieves their desired effects.

[0016] Furthermore, the fall-out prevention body must be configured so as to be able to freely restrict (restrict) the movement of the lower pivot shaft from the holding portion. For example, the anti-pullout body is configured so that the entry portion of the lower pivot shaft into the holding portion can be opened and closed freely (openable and closable) (it is provided with a biasing means that applies a biasing force in a direction to close the holding portion), and when the lower pivot shaft enters the holding portion, the entry portion of the holding portion can be released against the biasing force, and when the lower pivot shaft is positioned in the holding portion, the anti-pullout body closes the entry portion of the lower pivot shaft into the holding portion, and is configured so that the holding portion cannot be opened (the holding portion can be closed) unless an external force is applied, thereby inhibiting its movement, which is preferable because it can easily achieve the purpose.

[0017] 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).

[0018] When attaching a hinged door to a door frame, the lower side of the door is usually attached to the door frame first, and then the upper side of the door is attached to the door frame. However, with this shaft tensioning device, the upper side of the door can be attached to the door frame first, and then the lower side of the door can be attached to the door frame.

[0019] In other words, in this shaft fishing device, the lower shaft support portion is provided with a support portion and a stopper for the lower pivot shaft, and the stopper has a base on which a holding portion for the lower pivot shaft is formed and a stopper body for preventing the lower pivot shaft from coming out, and the base is formed with a holding portion for holding the lower pivot shaft, and the stopper body is arranged so as to be able to freely limit the movement of the lower pivot shaft from the holding portion.

[0020] Therefore, first, the upper pivot shaft, which is provided on the upper door frame via a support portion at the upper shaft support portion, is rotatably supported on the support portion of the upper pivot shaft attached to the swing door, thereby attaching the swing door to the door frame, and then the lower pivot shaft, which is attached to the lower door frame via a support portion at the lower shaft support portion, is inserted into the retaining portion, thereby easily attaching the swing door to the door frame.

[0021] In addition, in general swing doors, design requirements require that the upper gap be as short as possible in terms of clearance, but by using this shaft suspension device, only the minimum necessary gap is provided between the upper shaft support and the swing door, making it possible to shorten the clearance between the door frame and the swing door. Furthermore, by using this shaft fishing device, a shaft fishing device with a simple structure can be realized.

[0022] In addition, this shaft fishing device includes a support portion on the upper frame or the like, on which the upper pivot shaft is provided with its tip facing upward, protruding from the upper frame or the like, and a support portion for the upper pivot shaft, protruding from the swing door and provided above the support portion, for supporting the upper pivot shaft. The support portion can support the support portion for the upper pivot shaft from below (during normal use, the support portion for the upper pivot shaft is not placed on the support portion, but in the event of a problem, the support portion for the upper pivot shaft can be placed on the support portion), thereby providing a door-fall prevention function (door-fall prevention effect). Therefore, even if for some reason a malfunction occurs in the lower support portion and the swing door can no longer be supported, the support portion for the upper pivot shaft can be supported from below by the support portion, thereby preventing the swing door from falling. Furthermore, if the support part is attached to the left or right vertical frame instead of the top frame, the swing door can be supported more reliably even if it is heavy. [Effects of the Invention]

[0023] According to the present invention, it is possible to provide a shaft suspension device that has a simple structure, allows the dimensions to be made as short as possible, and prevents the swing door from falling. [Brief explanation of the drawings]

[0024] [Figure 1] FIG. 1 is a side view showing a hinged door to which the shaft suspension device of the present invention is attached. [Figure 2] 2(a) is an enlarged cross-sectional view of the X portion in FIG. 1, and FIG. 2(b) is an enlarged cross-sectional view of the Y portion in FIG. [Figure 3] FIG. 2 is a partially exploded perspective view showing the upper shaft support portion of the shaft fishing device of the present invention. [Figure 4] 1 is an exploded perspective view of the lower shaft support portion of the shaft fishing device of the present invention, viewed from above. FIG. [Figure 5] 1 is an exploded perspective view of the lower shaft support portion of the shaft fishing device of the present invention, viewed from below. FIG. [Figure 6] 6(a) is a side view opposite to FIG. 1 showing a hinged door to which the shaft suspension device of the present invention is attached, and FIG. 6(b) is a ZZ cross-sectional view of FIG. 6(a). [Figure 7] This is an enlarged cross-sectional view of a portion of the lower support portion during the installation work to the door frame of a swing door equipped with the shaft suspension device 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 lower support portion during the installation work to the door frame of a hinged door equipped with the shaft suspension device of the present invention, where (a) shows the state during installation and (b) shows the state after installation is completed. [Figure 9] This is an enlarged cross-sectional view of a portion of the lower support portion during the removal of a hinged door equipped with the shaft suspension device of the present invention from the door frame, where (a) shows the start of removal and (b) shows the end of removal. DETAILED DESCRIPTION OF THE INVENTION

[0025] Hereinafter, one embodiment of the present shaft fishing device J will be described in detail 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 appropriately modified, and explanations of detailed structures that are not directly related to the present invention will be omitted. In the following description, left-right and up-down directions are based on Fig. 1 (the door edge direction is the left direction, and the door tip direction is the right direction), and front-rear directions are based on the front direction in Fig. 1 and the depth direction is based on the rear direction. In addition, when describing the positional relationship with the hinged door D in the description of each element and member, the door edge will be based on the case where the hinged door D is attached to the door frame W and closed.

[0026] [Configuration of the main shaft fishing device of the first embodiment] (1) Overall structure The pivot fishing device J is a pivot hinge type pivot fishing device that includes a pair of upper and lower pivot support portions 5 and 6. First, the hinged door D and door frame W to which the pivot fishing device J is attached will be briefly described.

[0027] 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 provided in a rectangular opening, and is hung and opened / closed by a main axis hanging device J (Figures 1 and 2).

[0028] In other words, the swing door D is pivoted by the upper pivot support part 5 of this pivot support device J near the upper corner of the left vertical frame W2 of the door frame W at the door end side, and by the lower pivot support part 6 near the lower corner of the left vertical frame W2, and the swing door D is pivotally supported so that it can rotate, with the upper pivot shaft 15 of the upper pivot support part 5 and the lower pivot shaft 35 of the lower pivot support part 6 serving as support shafts.

[0029] At the upper end portion of the hinged door D, which is the mounting position of the upper pivot support portion 5 on the upper butt surface, a mounting groove is formed for mounting the upper support portion 20 described below. Furthermore, at the lower end of the hinged door D, which is the mounting position of the lower pivot support portion 6 on the lower butt end surface, a mounting portion for embedding the stopper 40 is formed.

[0030] (2) Structure of the upper support part The upper shaft support portion 5 includes an upper support portion 10 provided with an upper pivot shaft 15, and an upper bearing portion 20 (FIGS. 2(a) and 3).

[0031] The upper support portion 10 has a frame body mounting portion 11 for mounting to the left vertical frame W2, a base portion 14 to which an upper pivot shaft 15 is mounted, and the upper pivot shaft 15. The frame mounting section 11 is a composite shape consisting of a rectangular plate 12 and a triangular plate 13, with a base section 14 provided horizontally on top of the triangular plate 13. The rectangular plate 12 is attached to the upper edge of the butt end of the left vertical frame W2 with screws (not shown), and an upper pivot shaft 15 protrudes from the center of the base section 14 with its tip facing upward.

[0032] The upper support part 20 has a horizontal plate 21 and a bushing 25 provided at the tip 22 of the horizontal plate 21. The horizontal plate 21 is generally L-shaped when viewed from above, with the tip 22 formed in a slightly oblique shape, and one side is attached to the upper butt end surface at the left corner of the hinged door D. A round hole 22a is formed in the center of the tip 22 of the horizontal plate 21, and a bushing 25 is inserted into the round hole 22a. Furthermore, a plurality of elongated holes 21b for adjusting the left and right position are formed in the horizontal plate 21. Note that reference numeral 21a denotes mounting holes of the horizontal plate 21.

[0033] The upper support part 20 is located above the base part 14 of the upper support part 10, and the tip part of the upper pivot shaft 15 is inserted into a bush 25, so that the upper pivot shaft 15 is rotatably supported by the bush 25. The upper support part 20 can be supported from below by the base part 14 of the upper support part 10, thereby preventing the door from falling down.

[0034] (3) Configuration of the lower support The lower shaft support portion 6 includes a lower support portion 30 and a retaining device (hereinafter referred to as "retaining device 40") for the lower pivot shaft 35 (Figs. 2(b), 4, and 5). Note that only the essential parts related to the contents of the present invention will be explained below.

[0035] <Lower support part> The lower support portion 30 has a frame body mounting portion 31 for mounting to the left vertical frame W2, a base 32 on which a lower pivot shaft 35 is mounted, and the lower pivot shaft 35 itself. The frame mounting portion 31 is a rectangular plate, and an L-shaped base 32 is provided on the side surface of the frame mounting portion 31 .

[0036] The base 32 is composed of a right-angled pentagonal portion connected to the frame mounting portion 31 and a protruding portion 32a which is a horizontal surface formed from a semicircular portion and a rectangular portion. The frame mounting portion 31 is attached to the lower edge of the left vertical frame W2 with screws (not shown), and a lower pivot shaft 35 is protruding from the center of the protruding portion 32a of the base 32 with its tip facing upward. A sphere 36 is provided at the tip of the lower pivot shaft 35 to allow smooth rotation. The lower support portion 30 may be attached to the floor surface instead of the door frame W.

[0037] <Slip-out stopper> The anti-pullout device 40 mainly comprises a base body 41 made of synthetic resin or metal, two metal reinforcing plates 44A and 44B having the same shape (when viewed from above) as the base body 41, an anti-pullout body 45, and a coil spring 46 (a biasing member), with the base body 41 interposed between the upper and lower reinforcing plates 44A and 44B.

[0038] The base 41 is substantially L-shaped when viewed from above, with the tip formed in a slightly oblique shape. The base 41, which is integrated with the reinforcing plates 44A and 44B, has its upper surface attached to the tail end of the lower end of the hinged door D with screws (not shown). Although the reinforcing plates 44A and 44B are attached to the base body 41 by a plurality of screws 48, the base body 41 and the reinforcing plates 44A and 44B may be formed integrally.

[0039] The lower part of the outer surface of the tip of the base body 41 is open, and a circular holding portion 41a is formed to hold the lower pivot shaft 35. When the installation of the hinged door D is completed, the lower pivot shaft 35 is held by the holding portion 41a. Furthermore, a guide groove 41b for moving the pull-out prevention body 45 up and down is formed in the vertical direction on the outer surface of the tip of the base body 41, and the lower part of the guide groove 41b communicates with the holding part 41a.

[0040] A semicircular protector 43 is attached to the inner periphery of the retaining portion 41a with bolts 49 to resist the contact force of the lower pivot shaft 35. The base 41 is also formed with a plurality of elongated holes 41c for adjusting the left and right position (elongated holes are also formed in the reinforcing plates 44A and 44B at positions corresponding to the base 41).

[0041] The fall-out prevention body 45 is a member provided to prevent the lower pivot shaft 35 from falling out of the holding portion 41a. In a side view, the fall-out prevention body 45 has a shape that combines a right-angled trapezoid and an elongated rectangle. When the lower pivot shaft 35 is attached, the lower pivot shaft 35 comes into contact with the fall-out prevention body 45, thereby lifting the fall-out prevention body 45. The right-angled trapezoid portion (hereinafter, this portion is referred to as the "closing portion 45a" because it can serve to close the holding portion 41a) is oriented so that the acute angle of the trapezoid portion becomes the tip, and the elongated rectangular portion (hereinafter, referred to as the "elongated portion 45b") is slidable vertically within the guide groove 41b.

[0042] The upper reinforcing plate 44A is provided so as to cover the upper surface of the base body 41, and a coil spring 46 is interposed between the reinforcing plate 44A and the upper surface of the removal-preventing body 45. The coil spring 46 is inserted into an insertion hole 45c formed in the upper surface of the closing portion 45a of the removal-preventing body 45, and constantly applies a biasing force in a direction that presses the removal-preventing body 45 downward (in a direction that closes the holding portion 41a). The reinforcing plates 44A and 44B are attached to the base 41 by a plurality of screws 48.

[0043] The removal prevention body 45 is movable up and down (movable in the vertical direction) with its elongated portion 45b sliding along the wall surface of the guide groove 41b. When the blocking portion 45a of the removal prevention body 45 is in a lowered state and blocking (the entrance of) the holding portion 41a, the lower pivot shaft 35 cannot enter or leave (hereinafter referred to as "enter, etc.") the holding portion 41a, and when the removal prevention body 45 moves upward and (the entrance of) the holding portion 41a is opened, the lower pivot shaft 35 can enter, etc., the holding portion 41a (the removal prevention body 45 is configured to be able to open and close (the entrance of) the holding portion 41a).

[0044] [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 the following description, it is assumed that the components of the upper shaft support portion 5 and the lower support portion 30 of the lower shaft support portion 6 in this shaft fishing device J are attached to predetermined positions of the door frame W and the hinged door D. In addition, in Figures 7 to 9, the hinged door D is omitted to make the operation of the lower shaft support portion 6 easier to understand.

[0045] (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. In the above state, the upper pivot shaft 15 of the upper support part 10 is inserted into the bush 25 of the upper support part 20 in the upper shaft support part 5 of the fishing rod fishing device J.

[0046] Next, the lower pivot shaft 35 is gradually brought closer to the retaining portion 41a of the base body 41 of the stopper 40 (lower bearing portion 6) from the side (FIG. 7(a)), and is then inserted into the retaining portion 41a (FIG. 7(b)). At this time, the retaining portion 41a of the fall-out prevention body 45 is blocked by the biasing force of the coil spring 46. However, when the tip of the lower pivot shaft 35 abuts against the fall-out prevention body 45, the force of this contact causes the fall-out prevention body 45 to rise along the guide groove 41b of the base body 41, thereby opening the entrance of the retaining portion 41a (FIG. 8(a)), and the fall-out prevention body 45 is inserted into the retaining portion 41a. Thereafter, the biasing force of the coil spring 46 causes the fall-out prevention body 45 to descend the guide groove 41b and return to its original position, thereby blocking the retaining portion 41a (FIG. 8(b)).

[0047] (2) How to remove the swing door from the door frame At the lower shaft support portion 6 of the shaft fishing device J (FIG. 9(a)), a screwdriver S is used to push the pull-out prevention body 45 upward to open the holding portion 41a (FIG. 9(b)), and the lower pivot shaft 35 is pulled out from the holding portion 41a. When the operation of pushing the pull-out prevention body 45 upward is completed, the biasing force of the coil spring 46 causes the pull-out prevention body 45 to descend, and the holding portion 41a is closed.

[0048] Next, at the upper support portion 5 of the shaft fishing device J, the upper pivot shaft 15 is pulled out from the bush 25 of the upper support portion 20, and the hinged door D is removed from the upper support portion 5, thereby removing the hinged door D from the door frame W.

[0049] [Effects of the main shaft fishing device] In this shaft fishing device J, the upper shaft support portion 5 has a simple structure, and the lower shaft support portion 6 has a lower support portion 30 and a stopper 40. The stopper 40 has a base 41 on which a holding portion 41a of the lower pivot shaft 35 is formed, and a stopper 45 for preventing the lower pivot shaft 35 from coming off, and the stopper 45 is provided so as to be able to restrict the lower pivot shaft 35 from moving from the holding portion 41a. Therefore, when attaching a hinged door D to a door frame W, the lower side of the hinged door D is usually attached to the door frame W, and then the upper side of the hinged door D is attached to the door frame W. However, with this shaft lifting device J, the upper side of the hinged door D can be attached to the upper frame W1, and then the lower side of the hinged door D can be attached to the left vertical frame W2.

[0050] That is, with this pivot suspension device J, first, the upper pivot shaft 15 provided on the upper frame W1 is rotatably inserted into the bushing 25 of the horizontal plate 21 of the upper support part 20 provided at the upper end of the hinged door D, thereby attaching the hinged door D to the upper frame W1. Then, in the lower shaft support part 6, the lower pivot shaft 35 attached to the left vertical frame W2 via the lower support part 30 is inserted into the holding part 41a, and the removal prevention body 45 restricts the lower pivot shaft 35 from moving from the holding part 41a, thereby securely holding the lower pivot shaft 35 in the holding part 41a, and the hinged door D can be easily attached to the door frame W.

[0051] In particular, with this shaft fishing device J, when installing the hinged door D to the door frame W or removing the hinged door D, the opening of the holding portion 41a can be easily opened and closed by operating the anti-pullout body 45, allowing the lower pivot shaft 35 to be inserted and removed, and when the insertion work is completed, the opening of the holding portion 41a can be closed to easily prevent the lower pivot shaft 35 from coming out.

[0052] Furthermore, in a typical swing door D, the design requires that the upper gap be as short as possible in terms of the gap dimension (gap dimension) between the door frame W and the swing door D (it is also preferable to make the left and right gaps short, but it is acceptable for the lower gap to be somewhat longer). However, by using this shaft suspension device J, only the minimum necessary gap is provided between the upper shaft support part 5 and the swing door D, so the gap dimension between the door frame W and the swing door D can be shortened. Furthermore, by using this shaft fishing device J, there is no need to form a guide groove for the upper pivot shaft 15 at a predetermined position on the end grain surface near the upper corner, making it possible to realize a shaft fishing device with a simple structure.

[0053] Furthermore, the lower shaft support portion 6 has a coil spring 46 that biases the removal prevention body 45 in a direction that closes the opening of the holding portion 41a. Therefore, when the lower pivot shaft 35 is inserted into the holding portion 41a during the installation work of the hinged door D, the opening of the holding portion 41a is closed without any special operation, and therefore the removal prevention body 45 can be easily operated.

[0054] The pivot fishing device J also includes an upper support portion 10, which protrudes from the left vertical frame W2 and has an upper pivot shaft 15 with its tip facing upward, and a hinged door D. The upper support portion 20 is located above the base portion 14 of the upper support portion 10, and the tip of the upper pivot shaft 15 is inserted into a bushing 25, which rotatably supports the upper pivot shaft 15. This configuration allows the base portion 14 of the upper support portion 10 to support the upper support portion 20 from below, preventing the door from falling. Therefore, even if a malfunction occurs in the lower pivot portion 6 for some reason, making it unable to support the hinged door D, the upper support portion 10 supports the upper support portion 20 from below, preventing the hinged door D from falling. In addition, since the upper support portion 10 is attached to the left vertical frame W2, the hinged door D can be supported more reliably.

[0055] 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. In particular, with regard to each component of the present shaft fishing device described in the claims, various components can be used as long as they have the basic configuration and can achieve the same effects.

[0056] Furthermore, the components of the upper and lower support parts (the lower support part, the stopper, etc.) described in the claims have the basic configuration, and various components can be used as long as they achieve the desired effects. Furthermore, there are no restrictions on the shape of the door frame, the attachment method of the stopper for the upper pivot shaft and the upper support part, or the attachment location of the support part for the lower pivot support part. [Explanation of symbols]

[0057] J shaft fishing device D. Swing door W door frame W2 left vertical frame 5 Upper shaft support 6 Lower shaft support 10 Upper support part 11 Upper mounting plate 15 Upper pivot axis 20 Upper support part 21 horizontal plate 25 Bush 30 Lower support part 31 Lower mounting plate 35 Lower pivot axis 40 Stopper 41 Base 41a Holding part 41b Guide groove 45 Anti-slip body 46 Coil spring (biasing member)

Claims

1. The hinged door is pivotally supported by an upper pivot shaft provided on an upper support portion at the upper end of the hinged door and a lower pivot shaft provided on a lower support portion at the lower end of the hinged door, and the pivoting device pivots the hinged door to a door frame having at least an upper frame, a left vertical frame, and a right vertical frame. The upper support portion is The hinged door is provided with a support part that protrudes from the upper frame, the left vertical frame or the right vertical frame, and has the upper pivot shaft provided with its tip facing upward, and a support part for the upper pivot shaft that protrudes from the hinged door and is provided above the support part, and supports the upper pivot shaft, The support portion is configured to be able to support the support portion of the upper pivot shaft from below, thereby providing a door fall prevention function, The lower support portion is a support portion attached to a floor surface on which the left vertical frame, the right vertical frame, or the door frame is provided, and on which the lower pivot shaft is provided; a stopper for the lower pivot shaft provided at the lower edge of the hinged door, The lower pivot shaft retainer is a base body and a fall-out prevention body for the lower pivot shaft, a holding portion for holding the lower pivot shaft is formed on the base body, the lower pivot shaft is rotatably held by the holding portion, A shaft tensioning device characterized in that the anti-slip body is configured to be able to restrict the movement of the lower pivot shaft from the holding portion.

2. The hinged door is pivotally supported by an upper pivot shaft provided on an upper support portion at the upper end of the hinged door and a lower pivot shaft provided on a lower support portion at the lower end of the hinged door, and the pivoting device pivots the hinged door to a door frame having at least an upper frame, a lower frame, a left vertical frame, and a right vertical frame, The upper support portion is The hinged door is provided with a support part that protrudes from the upper frame, the left vertical frame or the right vertical frame, and has the upper pivot shaft provided with its tip facing upward, and a support part for the upper pivot shaft that protrudes from the hinged door and is provided above the support part, and supports the upper pivot shaft, The support portion is configured to be able to support the support portion of the upper pivot shaft from below, thereby providing a door fall prevention function, The lower support portion is a support portion attached to the lower frame and having the lower pivot shaft provided thereon; a stopper for the lower pivot shaft provided at the lower edge of the hinged door, The lower pivot shaft retainer is a base body and a fall-out prevention body for the lower pivot shaft, a holding portion for holding the lower pivot shaft is formed on the base body, the lower pivot shaft is rotatably held by the holding portion, A shaft tensioning device characterized in that the anti-slip body is configured to be able to restrict the movement of the lower pivot shaft from the holding portion.

3. The lower 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 lower pivot shaft enters the holding portion, 3. The shaft fishing device according to claim 1, wherein the holding portion is configured to be able to be closed when the lower pivot shaft has finished entering the holding portion.

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