JPH09170371A - Door swivel bearing construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To disperse weight of a door side at a case side to bear and to increase bearing capacity. SOLUTION: The bearing construction is so constituted that an L-shaped bracket 5 fixing a pivot hinge 6 thereto is fixed to a case 1 in an upper side bearing position. The pivot hinge 6 is equipped with an axial pin and a calking provided to up and down of an intermediate column section respectively, and the axial pin is freely fitted into a through-hole on an upper edge section of a door 2 to bear it. A lower side bearing position is constituted of a bracket 3 and a pivot hinge 4. Accordingly, total weight of the door 2 side is divided into approximate two parts on the upper side pivot hinge 6 and the lower side pivot hinge 4 to bear, weight bearing capacity on the lower side bearing position is approximately reduced by half in comparison with the conventional way, and weight capacity of the door can be increased as a whole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door support structure for opening and closing a rectangular case opening with one side being vertical by pivoting around an axis near the vertical side on either side,
Particularly, the present invention relates to a swing support structure for a door in which the weight on the door side is distributed and borne by the case side to increase the supporting capacity.

[0002]

2. Description of the Related Art Two conventional examples will be described below with reference to FIGS. FIG. 4 is a side sectional view of a conventional example. In FIG. 4, for example, a rectangular opening 1a is opened on the left side of the case 1 of the switchboard, and a door 22 is attached to the back surface (right side of the drawing) of the case 1 so as to surround the opening 1a of the case 1. It is closed via a rod-shaped sealing member 7 having a circular cross section. At this time, the door 22 pivots around a vertical axis on either the left or right side as viewed from the front to open and close. FIG. 4 shows a swing support structure for the door 22. The door 22 having a sheet metal structure has a lower portion of the front frame 28 at its upper edge portion, a horizontal portion of the L-shaped bracket 23 fixed to the case 1 at its lower edge portion, and a shaft pin 26 with a lever, respectively. And is pivotally supported via a shaft fitting 24. The front surface frame 28 is a frame body of a sheet metal structure that is screw-fixed to the upper front surface of the case of the switchboard, and the name and the code of the switchboard are described, for example. At the same time, the lever-equipped shaft pin 26 is vertically movable so that the door 22 can be easily attached to the case 1.

That is, the lower shaft fitting 24 is a member in which shaft-like portions project above and below the intermediate cylindrical portion, of which the lower shaft portion is fixed to the horizontal portion of the receiving fitting 23 by caulking, The shaft pin of (1) loosely engages with the through hole at the lower edge of the door 22 to support it. The upper shaft pin 26 with lever is a round bar bent in an L shape, and the lower part of the vertical part thereof vertically penetrates the U-shaped frame 21 fixed to the back side of the door 22, and the upper end part thereof is also the same. It becomes an axis pin and the door 2
2 has a structure in which the upper edge portion 2 and the through hole in the lower portion of the front frame 28 are loosely fitted. Moreover, the retaining ring 27 is provided at an intermediate position of the vertical portion of the lever-equipped shaft pin 26, and the compression coil spring 25 is inserted between the lower surface of the retaining ring 27 and the lower horizontal portion of the frame 21. Therefore, the lever-equipped shaft pin 26 is initially positioned with respect to the frame 21 as indicated by the solid line in the drawing, while being subjected to the upward bias of the coil spring 25. Now, when attaching the door 22 to the case 1,
First, pull down by pulling the lever of the horizontal portion of the lever-equipped shaft pin 26 so that the shaft pin at the upper end thereof is located below the lower portion of the front frame 28, and the lower edge of the door 22 is penetrated. The door 22 is properly positioned while the hole is loosely engaged with the upper shaft pin of the shaft fitting 24. Next, when the lever of the horizontal portion of the lever-equipped shaft pin 26 is released, the coil spring 25
By the urging of No. 2, the shaft pin at the upper end of the lever-equipped shaft pin 26 loosely fits into the through hole in the lower portion of the front frame 28, and the mounting is completed.

FIG. 5 is a side sectional view of another conventional example. This another conventional example has a simpler structure than the previous one. In the upper shaft support structure, a through hole in a lower portion of the front frame 28 is loosely fitted to a shaft pin 36 that is fixed to the upper edge portion of the door 22 by caulking and protrudes upward to rotatably support the shaft pin 36. On the other hand, in the lower shaft support structure, the shaft fitting 24 is fixed to the horizontal portion of the L-shaped receiving fitting 23 fixed to the case 1 as in the prior art example, and the door 22 is attached to the end of the shaft pin.
The through holes in the lower edge portion are loosely engaged and rotatably supported. When attaching the door 22 to the case 1, the front frame 2
8 is removed, and first, the through hole of the lower edge of the door 22 is loosely fitted to the shaft pin of the tip of the shaft fitting 24. Next, front frame 2
The shaft 8 is positioned while allowing the shaft pin 36 to be loosely fitted in the through hole of the lower portion thereof, and is screwed to the case 1 from the back side.

[0005]

SUMMARY OF THE INVENTION One conventional example and another conventional example have the following problems in common. Except when the door is locked with respect to the case, the weight and the moment based on the weight (corresponding to weight × door width / 2) act on the swivel support portion of the door. , The upper and lower support points share the moment, but the lower support point bears the weight. Therefore, when mounting various instruments on the door, or when increasing the thickness of the sheet metal structure of the door, etc., strengthen the supporting part on the lower side in consideration of the total weight, that is, increase the supporting capacity. It is also possible to change the structure to. In this way, changing the structure of the switchboard in order to increase the total weight of the door, including the instrumentation, may cause discomfort in appearance, especially when the switchboards are arranged side by side, so-called row boards. Or, it will disturb the harmony of the design, which is not preferable.

The problem to be solved by the present invention is to solve the above-mentioned problems of the prior art and to distribute the weight of the door side on the case side so as to increase the supporting capacity. To provide a swing support structure for a closed door.

[0007]

SUMMARY OF THE INVENTION The present invention is a door support structure for opening and closing a rectangular case opening having one side vertical by pivoting around an axis near the vertical side on either side. , The case is provided with an upper support and a lower support for receiving the upper edge and the lower edge of the door located on the turning axis from below, respectively, and the circular through hole and the circular shaft pin which is loosely engaged with the through hole are provided. One of the above is provided coaxially with the swivel axis at the upper edge and the lower edge of the door, and the other is provided coaxially with the swivel axis at the upper support and the lower support.

Further, in the present invention, it is preferable that the spacer is inserted between the upper edge portion of the door and the upper receiving portion or between the lower edge portion of the door and the lower receiving portion. Therefore, according to the present invention, the weight on the door side is divided into two substantially equal parts by the upper and lower receiving members via the upper edge portion and the shaft pin and the lower edge portion and the shaft pin, respectively. It is distributed and paid.

When the distance between the lower surfaces of the upper and lower edges of the door is slightly longer than the distance between the upper surfaces of the upper and lower receiving members due to manufacturing error, it corresponds to the difference in distance. When a spacer with a thickness is inserted between the upper edge of the door and the upper support, and when it becomes a little shorter on the contrary, a spacer with a thickness corresponding to the difference in distance is provided between the lower edge of the door and the lower support. Inserted between the ingredients. As a result, the distance between the lower surfaces of the upper and lower edges of the door and the distance between the upper surfaces of the upper and lower receivers become equal, and the weight on the door side becomes lower than that of the upper and lower receivers. Adjusted to be evenly distributed by the tool.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As embodiments of the present invention, first, second and third embodiments will be described below with reference to FIGS. FIG. 1 is a side sectional view of the first embodiment.
The difference between the first embodiment and each conventional example is the respective structures of the upper support portion of the door 2 and the front frame 8. At the upper supporting portion, the L-shaped receiving fitting 5 to which the shaft fitting 6 is fixed is fixed to the case 1. The shaft metal fitting 6 is a member in which shaft-shaped parts project above and below the intermediate columnar part, and the lower shaft part of the shaft metal part is fixed to the horizontal part of the receiving metal fitting 5 by caulking, and the upper shaft pin is above the door 2. It is supported by loosely mating with the through hole at the edge. The lower support portion is composed of the receiving metal fitting 3 and the shaft metal fitting 4, and is essentially the same as in each conventional example. Here, the upper receiving member in the invention corresponds to the receiving metal member 5 and the portion up to the upper step of the intermediate cylindrical portion of the shaft metal member 6 in the first embodiment. Similarly, the lower receiving member is the receiving metal member 3 in the same manner. And the portion up to the upper step of the intermediate columnar portion of the shaft fitting 4. The shaft pin corresponds to the shaft portion of the shaft fitting 6 or 4 that projects upward from the intermediate columnar portion. The front surface frame 8 corresponds to the front surface frame 28 in each conventional example, but does not rotate and supports the shaft pin on the upper side of the door 2, but is simply screwed to the upper front surface of the case 1 of the switchboard, for example, the name of the switchboard. And the code is described.

In the first embodiment, in order to attach the door 2 to the case 1, the front frame 8 is removed in advance, the door 2 is lifted above the normal position, and then pushed in and then lowered to each shaft fitting. Fit in the 4 and 6 shaft pins. Finally, the front frame 8 is attached. Therefore, the total weight on the side of the door 2 is almost halved by the upper shaft metal fitting 6 and the lower shaft metal fitting 4 and is borne, and the weight burden on the lower supporting portion is markedly higher than that of each conventional example. Therefore, the weight capacity of the door can be increased as a whole.

FIG. 2 is a side sectional view of the second embodiment. The second embodiment differs from the first embodiment in that the upper and lower shaft fittings 16 and 14 are fixed to the door 12 side. Each of the shaft fittings 16 and 14 has a structure in which a caulking portion for the door 12 is common above the intermediate cylindrical portion, and a shaft pin projects downward so as to fit in the through holes of the receiving fittings 15 and 13, respectively. That is, the upper and lower receivers in the invention are
It corresponds to the receiving fittings 15 and 13 in the second embodiment, respectively, and the respective shaft pins thereof also correspond to the shaft portions of the respective shaft fittings 16 and 14 that project downward from the intermediate cylindrical portion.

FIG. 3 relates to the third embodiment, (a) is a side sectional view when the spacer is inserted on the upper side, and (b) is a side sectional view when the spacer is inserted on the lower side. The third embodiment is basically the first embodiment and has a structure for adjusting an error in manufacturing (processing and assembling of parts). That is, in FIG. 1 showing the first embodiment, the distance between the upper edge lower surface and the lower edge lower surface of the door 2 may be increased due to a manufacturing error so that the upper step (the axial pin When it becomes slightly longer than the distance between the (root) location and the upper step (root of the shaft pin) location of the intermediate cylindrical portion of the lower shaft fitting 4, the door 2
The upper surface of the upper edge portion is slightly floated from the shaft pin root portion of the shaft fitting 6, and the weight of the door 2 is borne by the shaft pin root portion of the lower shaft fitting 4, and the same result as the conventional example is obtained. Therefore, as shown in FIG. 3 (a), a spacer (washer) 9 having a thickness corresponding to the difference in the distance is inserted between the lower surface of the upper edge of the door 2 and the shaft pin root of the shaft fitting 6. It As a result, the difference in the distance is adjusted, and the weight of the door 2 can be equally divided into two at the upper support point and the lower support point to be borne. Here, as the spacer 9, parts having various thicknesses of 0.5 mm are prepared, and an appropriate one is selected, or the spacer 9 has a thickness of 0.
There is a way to choose the number of 5mm parts.

On the contrary, in FIG. 1, the distance between the lower surface of the upper edge portion and the lower surface of the lower edge portion of the door 2 depends on the manufacturing error and the root position of the shaft pin of the intermediate cylindrical portion of the upper shaft fitting 6 and the lower position of the shaft pin. When the distance between the roots of the shaft pins of the intermediate cylindrical portion of the side shaft fitting 4 becomes slightly shorter, the lower surface of the lower edge of the door 2 becomes slightly floating from the roots of the shaft pins of the shaft fitting 4, and the door The weight of 2 is borne by the shaft pin root portion of the upper shaft fitting 6, and the same result as the conventional example is obtained. Therefore, as shown in FIG. 3 (b), the spacer (washer) 9 having a thickness corresponding to the difference in the distance is provided in the door 2
It is inserted between the lower edge lower surface and the shaft pin root portion of the shaft fitting 4, and the weight of the door 2 is evenly shared between the upper support portion and the lower support portion. By the way, in the drawing, the difference (absolute value) in the length of the distance is the same in FIGS. 3A and 3B, and the same spacer 9 is used.

[0015]

According to the present invention, the following excellent effects are expected. (1) The weight on the door side is divided into approximately two parts by the upper edge part and the lower edge part through the upper edge part and the axis pin, and the lower edge part and the axis pin, respectively. Because it will be burdened
The supporting capacity, which is the ability to bear the weight on the door side, is increased as compared with the conventional example. As a result, the restrictions on mounting instruments on the door and increasing the thickness of the steel plates that make up the door are alleviated, and the support structure for the door is unified, and in particular, a plurality of switchboards are installed side by side. Design harmony is achieved in the case of so-called row boards. Also, the door can be easily attached to the case. (2) Actually, as a manufacturing error, the distance between the lower surfaces of the upper and lower edges of the door and the distance between the upper surfaces of the upper support and the lower support are usually slightly different. By inserting a spacer with a thickness corresponding to the difference in distance between the upper edge of the door and the upper support, or between the lower edge of the door and the lower support, the weight on the door side is increased. It can be adjusted to be evenly loaded by the receiver and the lower receiver.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a first embodiment according to the present invention.

FIG. 2 is a side sectional view of the same second embodiment.

[FIG. 3] Similarly, regarding the third embodiment, (a) is a side sectional view when the spacer is inserted in the upper side, and (b) is a side sectional view when the spacer is inserted in the lower side.

FIG. 4 is a side sectional view of a conventional example.

FIG. 5 is a side sectional view of another conventional example.

[Explanation of symbols]

 1 Case 1a Opening 2,12 Door 3,13 Receiving metal fitting (lower side) 4,14 Shaft metal fitting (lower side) 5,15 Receiving metal fitting (upper side) 6,16 Shaft metal fitting (upper side) 7 Sealing member 8 Front frame 9 Spacer

Claims (2)

[Claims] 1. A rectangular case opening with one side vertical,
A support structure for a door that swivels and opens and closes about an axis near a vertical side on either side, and an upper receiving member that receives the upper edge and the lower edge of the door located on the swivel axis from below, respectively. And the lower support are provided on the case side, and one of the circular through hole and the circular shaft pin that engages with the circular through hole is provided on the upper edge and the lower edge of the door coaxially with the swivel axis, and similarly. A swivel support structure for a door, characterized in that one is provided on the upper support and the lower support coaxially with the swivel axis. 2. The support structure according to claim 1, wherein a spacer is inserted between the upper edge portion of the door and the upper receiving portion or between the lower edge portion of the door and the lower receiving portion. A swing support structure for the door.