JP3529939B2 - Hinge device for distribution panel door - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinge device for a distribution board having a door whose end opens upward against gravity.
In particular, the present invention relates to a hinge having a function of holding a door in an opened state.

[0002]

2. Description of the Related Art Due to the mounting position of a distribution board, the above-mentioned door that opens upward has to be held horizontally when the distribution board is mounted on a vertical wall surface. .
When trying to hold the door in this state, it is necessary to support the door against the weight of the door and the moment generated at the distance between the hinge axis and the center of gravity of the door, and the end on the side that opens from the hinge axis must be supported. You have to choose whether to support the door closer to the part with less force or to support the door closer to the hinge axis with strong force, but if you try to adopt the former method, you need to attach a dimensionally large stay It is not preferable in appearance because of the presence of

[0003]

[Problems of the Prior Art] Generally, the latter method is selected because of its appearance, but it requires a very strong elastic holder, which makes it difficult to form a compact structure and has a strong force. Since it was necessary to support the door locally, stress was applied to the surrounding members, and the friction caused by the force caused the parts to wear out, making it impossible to support the door after opening and closing it many times.

Further, the size of the distribution board varies depending on the application, and the size of the door is also formed in accordance with the size of the distribution board, so that there are various types from light to heavy. Therefore, if you try to share the member with all the doors while keeping the supporting force of the elastic holding member constant, if you use a small door with a light weight and a large door with a heavy weight, There was a problem that the operation feeling was different, and the door with a large heavy weight closed with a slight shock.

[0005]

SUMMARY OF THE INVENTION Therefore, the present invention has a structure in which the door is opened and held horizontally and the supporting portion is moved to the hinge shaft side as much as possible, but a strong elastic holder is not required. There is little wear due to friction without adding excessive force to the surrounding members, it can be configured in a small size, and it can support heavy or light doors in the same way, and the operation feeling of opening and closing is also extremely different, It is an object of the present invention to provide a hinged device for a door of a distribution board that can be configured with the same parts.

[0006]

[Means and Actions for Achieving the Object] In order to achieve the above-mentioned object, according to the invention of the present application, the hinge of the distribution board door is fixed to the door side and the door whose end opens upward against gravity. Hinge metal fitting A, a frame for hingedly attaching a door, a hinge metal fitting B fixed to the frame side, a first shaft connecting hinge metal fittings A and B in a hinged manner, and an intermediate piece for hinge metal fitting B. Is pivotally supported by the second shaft.
And has a substantially U-shape that urges the door in the direction to open it.
Hinge device for door of distribution board consisting of support plate made of elastic plate
In, the hinge metal fitting A is brought into contact with the support plate.
The support plate is provided with a protruding contact portion, and
Abuts and elastically holds the door open.
When rotating the door to the closed state, the relevant contact part must be overcome.
So that it has a cam surface formed by bending the tip,
The shape from the second shaft to the cam surface is almost linear, and the door
Door rotation moment at the relevant contact when open
Is almost parallel to the direction of and the cam surface is in contact with the contact part.
Abuts the first shaft center when the door is open at
The angle between the shaft and the second axis of hinge bracket B is approximately right angle
Between the second shaft and the abutting portion and the end direction of the cam surface.
The angle is characterized by being obtuse, so that when supporting a couple force generated at the abutment part provided on the hinge A side by the weight of the door when the door is held horizontally by the support plate, The line segment connecting the contact point between the contact surface of the hinge A on the cam surface side of the support plate and the support position of the support plate on the hinge B substantially overlaps with the direction of the force line of the couple of the contact portion. From the second shaft to the cam surface
Has a substantially linear shape, and when the door is open,
Is almost parallel to the direction of the door's rotation moment,
Support of the support plate in the first shaft center, the contact portion, and the hinge bracket B.
Since the angle of the lifting position is approximately perpendicular, need not name to support only the extra force simple compressive force is applied to the support plate.
In order to close the door, the second shaft and the contact part and the cam surface
Since the angle between the end direction are the obtuse angle, the support plate generated cam surface when closing the compression force and the door of the above-described piezoelectric
It only needs to have a weak elastic holding function that can support the force component of compressive force (compressive force> component force) , does not apply an unreasonable force to surrounding members, has little wear due to friction, and can be made compact. .

Next, the substantially U-shaped support plate
The hinge bracket B so that when the door tries to move in the closing direction, the cam surface prevents the support plate from rotating in the escape direction .
To the hinge metal fitting B at the end opposite to the end where the cam surface is formed.
Since the support plate is provided with a rotation preventing means serving as a support, the support plate can be configured with elastic parts on both sides of the U-shape, so that only a part of the support plate has an elastic part. Where is
The stress limit can be set higher than in the above case, and the amount of engagement between the abutting portion and the cam surface can be sufficiently obtained, so that the door can be stably supported.

Further, the end of the U-shaped support plate opposite to the end on the cam surface forming side is supported to the hinge fitting B by the tip of a screw screwed to the hinge fitting B so as to be able to move back and forth. Since the size of the door makes it possible to adjust the engagement depth of the abutting part by advancing and retracting the screw depending on the size of the door, it is possible to stabilize the feeling of operation when opening and closing the door and the support of the door. Is possible.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings.

FIG. 1 shows an exploded view of each part of a hinge according to an embodiment of the present invention, FIG. 2 shows a sectional structure of essential parts, and FIG. 3 shows an overall view with a frame and a door attached.

In the figure, 1 is a door, 2 is a frame for attaching the door in a butterfly motion manner, 3 is a hinge metal fitting A fixed to the door with a screw 11, and 4 is fixed to a frame body with a screw 5. Hinge metal fittings B, 6 are the first shafts which pivotally support the hinge metal fittings A and B, 8 is a support plate formed by bending an elastic plate into a substantially U shape, and 9 is hinge plate metal fittings B. Second axis to support, 1
Reference numeral 0 is a screw that is screwed to the hinge fitting B so as to be able to move back and forth. Na
The support plate 8 is elastically urged in the direction to open the door of the hinge bracket A.
It is arranged so as to be tight.

In FIG. 2, reference numeral 301 indicates when the door is open.
The hinge part 3 is integrally formed with the hinge metal fitting A at the contact portion that contacts the support plate 8 . Reference numeral 801 denotes a cam surface formed by bending an end of a piece 802 on one side of the U-shaped support plate 8, and 804 a shaft for pivotally supporting the support plate 8 on the hinge fitting B by the second shaft 9. It is a hole and is provided in the middle of the U-shape. 803 is a piece 8
On the other side of 02, the end of the 803 is attached to the hinge fitting B.
When the cam is moved, it tries to move in the direction to close the door.
Rotating in the direction in which the surface escapes, that is, rotating the second shaft 9 in FIG.
The other side of the U-shape
A hinge 10 which is a rotation preventing means for supporting the end is provided with a screw 10 which is screwed so as to be able to move forward and backward , and is supported by the tip of the screw 10, and the support plate rotates counterclockwise in FIG. Have been thwarted.

First in FIG. 2 showing the open state of the door
In the center of the shaft 6, the contact portion 301, and the hinge fitting B
It is arranged so that the angle formed by the second shaft 9 is substantially right angle.
It In addition, the end of the contact surface 301 and the cam surface of the second shaft
The direction is obtuse.

FIG. 4 is a sectional state view of the hinge when the door is moved from the state of FIG. 2 to the closed position.

The function of the above hinge device will be described below. In the state of FIG. 4, the door 1 is closed with respect to the frame body 2, and in this state, the support plate 8 is provided with screws 10 at both ends of the U-shape.
And is elastically compressed by being sandwiched between the tip of the and the continuous edge 303 of the contact portion 301 of the hinge A. When the door 1 ′ in FIG. 3 is gradually opened in the direction of 1, the contact portion 301 in FIG.
01, and when the door 1 is further opened from the horizontal, the contact portion 301 rides over the cam surface 801, and at that time, the cam surface 801 enters the step portion 302 of the hinge bracket A by the elasticity of the support plate 8, The contact portion 301 is located on the cam surface 801. When the cam surface 801 enters the stepped portion 302, the elastic constraint of the support plate 8 is suddenly released and a clicking sound is heard, so that the operator can know that the door can be held even if the door is released.

When the hand is removed from the door, the hinge metal fitting A of 3 is urged to rotate counterclockwise about the first shaft 6 in FIG. 2 by its own weight. The contact portion 301 is the cam surface 8
You will have to press 01. The power at this time is the first power
And the size of the first shaft center and the contact part and hinge bracket B.
Since the angle formed by the second axis is substantially right angle, for example, the own weight of the door is 500 grams, and the center of gravity is at a position half the width X of the door in FIG. 50 if the separation distance from the axis 6 is 1/20 of X
It is 00 grams.

The first force acts on the cam surface 801 as a second force at a contact point with the contact portion 301 in a direction perpendicular to the cam surface 801, and pushes the cam surface.
The support plate 8 is pivotally supported by a second shaft so as to be rotatable.
The tip of the contact part 301 so that it can be overcome.
The cam surface 801 formed by bending the
Angle formed by the contact portion 301 and the end direction of the cam surface 801
Is provided so as to form an obtuse angle, and the second force is centered on the second component 9 and the first component force in the direction from the contact portion 301 to the second axis 9 as shown in FIG. It can be divided into a second component force that urges the support plate 8 to rotate counterclockwise in FIG .
Here, most of the force distribution of the first and second components is the first component force, and the second component force can be made very small. For example, the first
Secondary shaft, abutting portion 301, and end direction of cam surface 801
When the angle formed by and is set to 95 degrees, the ratio of the first component force to the second component force is about 1/10, and the first force is 5%.
If it is 000 grams, it corresponds to almost 500 grams.

Therefore, in the above calculation example, the cam surface 801
Theoretically, it is possible to horizontally support the door by urging clockwise about 500 g or more around the second axis 9 in FIG. In fact, in addition to the above calculation, it is necessary to take into consideration conditions such as friction and displacement due to axial play. Cam surface 801
The urging of 500 grams in the clockwise direction in FIG. 2 is obtained by forming the support plate 8 with an elastic plate. A force of about 500 grams is, for example, a support plate having a plate thickness of 0. It can be easily obtained by constructing a stainless steel plate for spring of about several millimeters. The first component force is supported by the second shaft 9, but only the longitudinal direction of the piece 802 is compressed by the first component force,
Usually, the plate has sufficient compressive strength against a force in this direction and can be almost ignored. If not according to the configuration of the present case, the force supporting the cam surface 801 reaches 5000 g in the worst case, and it becomes very difficult to form the elastic holder in a small size.

In FIG . 2, the cam surface 801 is connected to the contact portion 3
The force for urging clockwise in 01 about the shaft 9 is generated by supporting the bending elasticity of the part from the piece 802 to the piece 803 of the support plate 8 formed by bending the elastic body in a U shape with the tip of the screw 10. However, in the present invention, the support plate 8 is U-shaped, the intermediate piece is supported by the hinge metal B by the shaft 9, and the end of the piece 803 on the opposite side of the piece 802 having the cam surface 801 is screwed to the hinge B. Since it is configured to be supported via 10, bending elasticity can be generated in both the pieces 802 and 803, and the overall size can be made small while taking a large effective length of the elastic portion. That is, it is possible to reduce the load of bending stress on the plate material while making it compact.

As a result of the above, the door that has been once opened will not contact the contact portion 30.
1 is supported by the cam surface 801, so that it is held horizontally. Next, the case of closing the horizontally held door will be described. When a force is applied from the state of FIG. 2 in the direction of closing the door by hand, the first force gradually increases, and accordingly, the cam surface 801 is rotated counterclockwise about the shaft 9 of FIG. The second component force for urging increases, the elastic urging force of the support plate 8 can no longer withstand the second component force, the cam surface 801 starts to move gradually, and the contact portion 301 moves the cam. When the door is disengaged from the surface 801, the door can be largely moved in the closing direction and is closed at the position 1'in FIG.

According to the present invention, the screw 10 is screwed to the hinge support fitting B of 4 so as to be able to move forward and backward, and the piece 803 of the U-shaped support plate 8 is provided.
Since the tip of the screw 10 is applied to the end of the
By adjusting 0 with respect to the hinge fitting B, the amount of engagement between the cam surface 801 and the contact portion 301 in FIG. 2 can be adjusted, and the cam surface 801 is pushed all the way into the step portion 302 so that the screw 10 is still attached. If it closes, the position of the cam surface 801 remains the same, and as the opening angle of the U-shaped support plate becomes smaller and the elastic force increases, as a result, the cam surface 801 is centered on the shaft 9 in FIG. You can adjust the force to urge clockwise. Therefore, both a light door and a heavy door can be stably supported in a horizontal position, and the operation feeling when opening and closing the door can be adjusted to be constant.

[0022]

As described above, according to the invention of the present application, the door is opened and held horizontally, and the support portion is moved to the hinge side as much as possible, but it does not require a strong elastic body. , It is possible to configure it in a small size without applying excessive force to the surrounding members, abrasion due to friction, etc.
Further, it is possible to provide a hinge device for a distribution panel door, which can be supported by a heavy door or a light door in the same manner, and the operation feeling of opening / closing is not extremely different, and can be configured with the same parts.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of a hinge device of the present invention.

FIG. 2 is a functional cross-sectional view of the embodiment of FIG.

FIG. 3 is a side view of a door and a frame using the hinge of the embodiment of FIG.

FIG. 4 is a functional cross-sectional view when the hinge device of FIG. 1 is closed.

5 is a force line diagram of FIG.

[Explanation of symbols]

1 ... door 2 ... frame 3 ... Hinges A 301 ... abutting part 4 ... Hinges B 6 ... the first axis 8 ... Support plate 801 ... Cam surface 9 ... second axis 10 ... screw

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Claims (3)

(57) [Claims] 1. A door whose end portion opens upward against gravity, a hinge metal fitting A fixed to the door side, a frame body hinged to the door, and a hinge metal fitting B fixed to the frame body side. A first shaft connecting the hinge fittings A and B in a butterfly motion manner, and an intermediate piece part is pivotally supported on the hinge fitting B by the second shaft.
And has a substantially U-shape that urges the door to open.
For hinge device of distribution panel door consisting of support plate made of elastic plate
In addition, the hinge fitting A is provided with a protrusion provided so as to come into contact with the support plate.
A contact portion, the support plate is in contact with the contact portion, and the door
Elastically holds the door open and closes the door
When rotating to, make sure that the contact point gets over
The cam surface is formed by bending the end , and the shape from the second shaft to the cam surface is substantially linear,
When the door is open, the door rotation
The door is in the open state when the cam surface is in contact with the contact part
At the center of the first shaft, the contact portion, and the hinge bracket B,
The angle formed by the second shaft is substantially right angle, and the contact part
The angle between the cam surface and the end direction of the cam surface is obtuse.
A hinged device for the distribution panel doors that was used as a feature . 2. In the support plate having a substantially U-shape, the cam surface escapes when the door tries to move in the closing direction .
To prevent rotation of the support plate of the
Supports the hinge metal fitting B at the end opposite to the forming end
The hinge device for the distribution panel door according to claim 1, further comprising rotation preventing means . 3. The hinge bracket B is supported at the end opposite to the cam surface forming side end of the U-shaped support plate by a tip of a screw screwed to the hinge bracket B so as to move back and forth. The hinge device for a distribution board according to claim 2, wherein the hinge device is a switchboard hinge.