JP2001002103A - Operating force relieving device for opening/shutting body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To relieve an operating force for an opening/shutting body and to make adjustment therefor easy. SOLUTION: An opening/shutting body 4 is made to be integral with a link 3 provided so as to rotate round a pivot 2a of a pivotal support part 2 which is fixed to a base 1, a movable connecting member 6 is connected by screwing so as to be displaced linearly to an adjusting bolt 5 supported with the pivotal support part 2, a lower connecting part of a coil spring unit 7 is connected to the movable connecting member with a pin 6a, and an upper connecting part 7c of the coil spring unit 7 is connected to the link 3 with a pin 3a. Therefore, the height H from the pivot can be optionally changed with the movable connecting member moved upward and downward by operation of the adjusting bolt and placed at an optional position, and a characteristic of a counter moment working inversely against a moment working in a shutting direction by a self-weight of the opening/shutting body can be changed, and an optimum relieve of operating force for opening and shutting can be achieved constantly in accordance with inconsistency at an initial time and a secular change.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation force reducing device for an opening / closing body such as a lid.

[0002]

2. Description of the Related Art Conventionally, there is a device that opens and closes a lid using power (electric power, hydraulic pressure, and pneumatic pressure) in order to facilitate the operation of opening and closing a heavy lid. In the case where it is not necessary to open and close the door, the cost is high.For the lid that is opened and closed in the vertical direction, the moment due to the weight of the open / close body in the open / close range is canceled by the spring means as much as possible to reduce the opening / closing operation. There is an operation force reducing device for an opening and closing body.

There are various types of spring means in such an apparatus, and for example, in a cover of a copier or a trunk for a car, there is an apparatus using a gas spring type apparatus. 10 and 11 show examples using the gas spring type device.
Is shown below with reference to FIG.

In FIG. 10, a lid 32 is tiltably supported by a pivotal support 31a integrated on the upper surface of a casing 31 as a base, and the lid 32 allows the casing 31 to have an open upper surface (not shown). Can be opened and closed. Further, in order to reduce the opening / closing operation force of the relatively heavy lid 32, the intermediate portion on the side surface of the lid 32 and the casing 31
And a gas spring unit 33 is provided. Both ends of the gas spring unit 33 are rotatably connected to an intermediate portion of the side surface of the lid 32 and the casing 31 respectively.

The connecting position of the gas spring unit 33 to the casing 31 is such that the lid 32 is located on a vertical line of the axis of the pivot 31a with the lid 32 standing upright on the upper surface of the casing 31. ing. As a result, FIG.
As shown in the figure, when the opening direction θ as the opening / closing angle of the lid 32 is 90 degrees and the closing moment Mc of the lid 32 becomes 0, the reverse moment Ms due to the spring force of the gas spring unit is also increased. At 0, the open range of the lid 32 can be set to a range from 0 degrees to 180 degrees.

[0006]

However, in the gas spring unit 33, the piston rod 33b extending outward from the cylindrical cylinder 33a closes the open end surface of the cylindrical cylinder 33a. The seal portion 34 is provided by, for example, an O-ring in order to secure the sealing property of the sliding portion because the gas reciprocates in a direction penetrating the gas passage. There was a problem that the spring function deteriorated (the imaginary line in FIG. 7) and the balance function was impaired.

In this case, it is necessary to change the mounting position of the gas spring unit 33 to a position corresponding to the characteristic change as shown by the imaginary line in FIG. In addition, even when the initial characteristic variation due to an assembly error or the like is large, it is necessary to change the mounting position accordingly, and in such a case, there is a problem that the assembling workability is extremely poor.

Other spring means include, for example, a torsion bar provided coaxially on the axis of the pivot portion in FIG. 10 and a tension coil spring provided in place of the gas spring unit. However, in the case where the mounting position is changed in accordance with the variation in the characteristics, there is a problem that the assembling workability is poor as described above.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, it is possible to reduce the opening / closing operation force of the opening / closing body and to easily perform the adjustment thereof. The opening and closing body is pivotally supported by a support unit integrated with the base so that the opening and closing body can be tilted with respect to the base, and the closing direction moment is reduced to reduce a closing direction moment caused by its own weight when the opening and closing body is opened. An opening / closing body operating force reducing device provided with a reaction force generating means for generating a reaction force in a direction opposing the opening direction of the opening / closing body against the closing moment of the opening / closing body. A spring body provided between a position of the pivot portion vertically separated from the pivot position and a position of the opening / closing member separated from the pivot position so as to generate a moment; Change Rubeku was assumed to have an opening direction moment changing means provided between at least one said spring element of said each position.

According to this, the tension length of the tension coil spring of the reaction force generating means for generating a moment in the direction opposite to the moment in the closing direction due to the weight of the opening / closing body is provided at one of the two coil ends. Since the tension can be changed by the tension length changing means, the characteristic of the moment in the reverse direction can be changed in accordance with the variation and aging of the tension coil spring.

Further, the spring body is formed of a spring which can be extended and contracted in the axial direction, and the opening direction moment changing means is arranged so that the connecting position of the spring body can be continuously displaced. And a fixing member for fixing the movable member at an arbitrary position provided at the separated position. According to this, the arm length of the opening moment can be changed at the position of the movable member, and the movable member can be continuously displaced, so that the magnitude of the opening moment is adjusted to the closing moment. It can be adjusted arbitrarily.

Further, the spring body is formed of a spring which can be extended and contracted in the axial direction, and the opening moment changing means keeps the initial load of the spring body continuously and freely changed. A spring length changing means is provided between the fixed portion or the separated position of the opening / closing body and the spring body. According to this,
Since the magnitude of the load of the opening moment can be changed by the spring length changing means, the magnitude of the opening moment can be arbitrarily adjusted according to the closing moment.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to specific examples shown in the accompanying drawings.

FIG. 1 is a side view showing an opening / closing body operating force reducing device used in a structure lid to which the present invention is applied. The present device is suitable for use in reducing the operating force when opening and closing a heavy lid, and the above-mentioned structure includes a snowfall groove and the like. The present invention is also applicable to a cover of a copier in which the apparatus is used, a trunk of an automobile, and the like.

In FIG. 1, a gantry 2 as a support is fixed to a base 1 of a structure by, for example, bolting. As shown in FIG. 2, one end of a plate-like link 3 is fixed to a pivot 2 a rotatably provided on the gantry 2 via a bush. The pivot-side portions of the left and right sides of the opening / closing body 4 are connected by screws or the like, and the link 3 and the opening / closing body 4 are integrated. In the drawing, only one side of the opening / closing body 4 is shown, and illustration of the other symmetrically configured portion is omitted.

The opening / closing body 4 is pivotally supported by the gantry 2 via the link 3 as described above, and is vertically erected with respect to the base 1 which is a vertical direction (a state shown by a solid line in the figure). The body can be freely tilted as shown by the arrow A in the figure between the body opening degree θ = 90 degrees) and the fully closed state where the opening degree is 0 degrees. In the illustrated example, it is possible to open from a state of 90 degrees to an opening of 180 degrees on the right side in the figure, and further, a range from a state of 0 degrees or less to a state of 180 degrees or more (for example, −10 degrees). (Degrees to 190 degrees).

An adjust bolt 5 is provided at an upper portion of the gantry 2 in the drawing, with a part of the head 5a immersed so that a screw portion thereof protrudes upward. An outward flange portion 5b is formed in a portion of the head portion 5a immersed in the gantry 2, and the outward flange portion 5b is formed.
The inside of the gantry 2 is formed in a shape that prevents the base from falling out.

A movable connecting member 6 as a movable member for connecting the spring body is screw-connected to the projecting end of the screw portion of the adjusting bolt 5, and by changing the screwing amount of the adjusting bolt 5, the movable connecting member 6 is connected. Adjusting bolt 5
, The height H of the connecting pin 6a, which is the movable end of the movable connecting member 6, from the pivot 2a can be changed. In this way, the opening direction moment changing means described later is configured. Further, fixing means for fixing the position (H) in the axial direction by screw connection of the adjusting bolt 5 is constituted.

A spring unit 7 constituting a reaction force generating means is provided on a protruding portion of the movable connecting member 6 having a convex cross section.
The bifurcated portion 7b formed on the lower connecting portion 7a is connected rotatably via a pin, and the upper connecting portion 7c of the spring unit 7 in FIG. It is rotatably supported by a pin 3a projecting in parallel with the pivot 2a at an end opposite to the side.
Therefore, when the opening / closing body 4 is opened at an opening θ other than the opening degree of 90 degrees, as shown by the imaginary line in FIG. Instead, the connecting pin 6a at a position separated by a height H from the pivotal position by the pivot 2a is inclined about the rotation center. Thus, the spring unit 7 as a spring body is
It is connected between a pin 3a at a position separated by a predetermined length from the pivot 2a of the opening / closing body 4 and a connection pin 6a at a position separated from the pivot 2a of the gantry 2 by a predetermined length.

As shown in FIG. 2, the spring unit 7 is rotatably connected to the pin 3a and includes a connecting pin 6a.
A small-diameter cylindrical cover 8a extending toward the side, and a large-diameter cylindrical cover rotatably connected to the connecting pin 6a and extending a so as to coaxially surround the small-diameter cylindrical cover 8a. 8b
And a tension coil spring 9 coaxially received in the covers 8a and 8b. The two coil ends of the tension coil spring 9 are respectively connected to the respective covers 8a and 8b, and can be extended and contracted in the axial direction between the two pins 3a and 6a with a certain initial tension and between the two covers 8a and 8b. A tension coil spring 9 is provided.

The operation of the opening / closing body operating force reducing device thus constructed will be described below with reference to FIG. FIG. 3 is a view similar to FIG. 7 shown in the conventional example, in which the vertical axis represents the moment in the fully closed (opening 0 degree) direction of the opening / closing body 4, and the horizontal axis represents the opening degree of the opening / closing body 4. Is shown.

As shown in FIG. 3, the opening degree θ of the
Is 90 degrees (the upright state shown by the solid line in FIG. 1), the closing direction moment Mc whose positive direction is the full closing direction due to the weight of the opening / closing body 4 is zero, and the opening / closing body 4 due to the spring force of the tension coil spring 7 is zero. The opening moment Ms in the direction of returning to the opening direction of 90 degrees is also zero. In the figure, the positive and negative of the opening moment Ms are displayed in accordance with the closing moment Mc for easy comparison. Closing direction moment Mc
Is the maximum value when the opening degree θ is 0 degree, and the opening degree θ is 90 degrees.
Degree, and decreases as the opening degree θ exceeds 90 degrees.
Although it is shown on the graph as minus until it reaches 80 degrees, the size is symmetrical with respect to the state where the opening degree θ is 90 degrees. Also, as shown in FIG.
Draws a cosine curve.

When the opening direction moment Ms coincides with the closing direction moment Mc, the opening / closing operation force on the opening / closing body 4 can be set to 0 at any angle. Can be reduced. In the fully closed (0 degree) state, it may be better to apply a certain amount of load in the closing direction. In such a case, when the opening degree θ is 0 degree, the opening direction is larger than the closing direction moment Mc. What is necessary is just to make the moment Ms small.

By setting as described above, the opening direction moment Ms becomes 90 degrees as shown in FIG.
In the case of the degree, the angle coincides with 0 as described above, and the opening moment θ1 having an opening degree of less than 90 degrees and the opening degree θ2 exceeding the opening degree 90 intersect with the closing moment Mc, respectively. By optimizing the intersecting position, the opening degree θ can be made substantially equal to the closing moment Mc at the full opening θ, and the opening / closing operation force of the opening / closing body 4 can be reduced.

In the tension coil spring 7, the opening moment Ms characteristic shown in FIG. 3 may differ from the design value due to the processing accuracy, mounting tolerance, or aging. In such a case, as described above, the head 5a of the adjustment bolt 5 is turned with a tool to change the amount of screwing into the movable connecting member 6, and the distance of the movable connecting member 6 from the pivot 2a is changed. The height H of the connecting pin 6a is changed. Thereby, since the characteristic of the opening moment Ms can be changed in the area indicated by hatching in FIG. 3, it is possible to sufficiently cope with the change with respect to the design value as described above.

In order to set the position of the connecting pin 6a,
A scale plate 10 is attached to the gantry 2. For example, the height H can be visually checked by the pointer and the scale plate 10 integrally attached to the movable connecting member 6, and can be used as a guide for setting the tension at the time of assembly. In addition, it can be used as a measure of the amount of change at the time of adjustment, and the adjustment work can be facilitated. By making the movement of the movable end portion linear as in the illustrated example, the structure can be simplified, and the cost of the device can be reduced.

The change of the characteristic of the opening moment Ms is not limited to the change of the arm length of the moment in the illustrated example, but may be a load adjustment type in which the spring force is changed. This is shown below with reference to FIG. The same parts as those in the illustrated example are denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in the figure, the plate-like link 3 for supporting the opening / closing member 4 and its supporting structure by the gantry 2 are the same as those in the above-described embodiment. Is provided with a pivotal support hole 2b parallel to the pivot 2a, and the pivotal support hole 2b rotatably supports a side protruding shaft portion 11a formed in the lower spring support 11 via a bush. .

An annular boss 12 having an axis parallel to the pivot 2a is projected from an end of the link 3 opposite to the pivot 2a. A laterally protruding shaft portion 13a formed at 13 is rotatably supported via a bush. Note that a collar may be provided instead of the annular boss portion 12.

An upper spring support 14 is provided below the upper connecting member 13 in the drawing.
An adjusting bolt 14 is provided in the upper spring support 14 so as to penetrate the tension coil spring 7 in the axial direction, and is screwed to the upper spring support 14. Therefore, the adjustment bolt 1
By turning 5, the upper spring support 14 can be displaced in the axial direction of the tension coil spring 9.

As described above, in the illustrated example, the coil length L of the tension coil spring 9 can be adjusted.
The initial load (tension) of the coil spring 9 can be changed continuously, and a spring length changing means for changing the axial length L of the coil spring 9 by the adjustment bolt 15 is constituted. In the illustrated example, the magnitude of the load of the opening direction moment Ms is changed. Even in this case, the same moment characteristics as those in FIG. 3 can be obtained, and the effect is the same.

The small-diameter cylindrical cover 8a is provided with a window 16 through which the lower end of an upper spring support 14 displaced inside can be viewed, and a scale 17 is marked beside the window 16. Thereby, the same effect as in the case where the scale in the illustrated example is provided can be obtained.

In the illustrated example, the case where a tension coil spring is used has been shown. However, according to the present invention, the invention is not limited to the tension coil spring, and a compression coil spring can also be applied. An example using a compression coil spring will be described below with reference to FIG. 6, but in the figure, only a portion corresponding to the load adjustment type spring unit 7 is shown.

As shown in FIG. 6, the compression coil spring 21
Are coaxially received in the cylinder 22, and the cylinder 22
One of the axial ends is formed with a laterally protruding shaft 1 in the same manner as described above.
The support portion 11 provided with 1a is fixed. Cylinder 2
An end plate 23 for retaining the compression coil spring 21 is fixed to the other end in the axial direction of 2. And
The cylindrical body 22 is provided with a rod 24 which is reciprocally received in the axial direction within the cylindrical body 22 and penetrates the end plate 23.

A thread 24a is formed at the axial end of the rod 24 received in the cylinder 22, and a spring seat 25 is screwed into the thread 24a. The spring seat 25
A compression coil spring 21 is provided between the end plate 23 and the end plate 23 so as to surround the rod 24. A disc-shaped head 24b is formed at the axial end of the rod 24 on the outer side of the cylindrical body 22 via a small-diameter neck lower part.
Is received in the upper connecting member 13 having the side protruding shaft portion 13a formed in the same manner as described above, and is rotatable around the axis of the rod 24 and is prevented from falling off.

The side protruding shaft portion 13 according to the opening / closing of the opening / closing body 4
When a moves in an arc around the pivot 2a, the distance between the two projecting shafts 11a and 13a changes, and the compression coil spring 21 moves in accordance with the amount of the rod 24 projecting outward from the cylinder 22. Are compressed and deformed, and the spring load increases. Therefore,
The same effect as that of the spring unit 7 using the above-described tension coil spring can be obtained, and a larger spring load can be obtained than when the same tension coil spring is used under other conditions, and the spring unit 7 can be made compact.

The characteristics of the opening moment Ms can be changed in the same manner as in the load adjusting type.
In the illustrated example, for example, a two-chamfered portion 24c is formed near the upper connecting member 13 of the rod 24,
By turning the rod 24 by applying a tool to the two chamfered portions 24c, the spring seat 25 screwed to the screw portion 24a advances and retreats in the axial direction of the rod 24, so that the initial load of the compression coil spring 21 is continuously reduced. Can be changed to

In order to advance and retreat the spring seat 25 by rotating the rod 24, it is necessary to make the structure that the spring seat 25 does not rotate. In the illustrated example, as shown in FIG. An axial slot 2 is formed on the peripheral wall of the cylindrical body 22.
2a is formed, and a radially protruding projection 25a that projects a part of the spring seat 25 outward in the radial direction is formed in the slot 22a.
Has been inserted. Accordingly, the spring seat 25 does not rotate with respect to the rotation of the rod 24, and the spring seat 25 can advance and retreat in the axial direction of the rod 24. Also, a scale similar to the above-described scale 17 may be written on the slot 22a side, and the radially outward protruding portion 25a may be used as a pointer.

There are various types of structures for preventing the spring seat 25 from turning so that the spring seat 25 can be advanced or retracted by turning the rod 24. In addition to the above-described example, as shown in FIG. The cylindrical body 22 may be formed in a rectangular cross-sectional shape, and the spring seat 25 may be formed in a similar shape. In this case, the scale may be provided with a slot and a radial projection in the same manner as described above, but the scale may be marked on the rod 24 using the upper end (end plate 23) of the cylindrical body 22 as a guide.

The spring body applicable to the present invention is not limited to the above-described coil spring as long as it is a spring that can be extended and contracted in the axial direction. For example, a disc spring may be used, and an example thereof will be described below with reference to FIG. 9 similar to FIG. In addition,
The same parts as those in the illustrated example are denoted by the same reference numerals, and detailed description thereof will be omitted.

The spring unit using this disc spring is the same as the one using the above-mentioned compression coil spring 21. Instead of the compression coil spring 21, a plurality of disc springs 26 are superposed in the cylinder 22 in the axial direction. Thus, a disc spring 26 is provided between the end plate 23 and the spring seat 25. Therefore, the disc spring 26 is compressed and deformed in accordance with the amount of the rod 24 protruding outside the cylindrical body 22, and the spring load increases.

By using the disc spring in this manner, a larger spring force can be generated with a shorter stroke than when the coil spring is used to compressively deform. Therefore, the compactness of the device can be improved.

A compression coil spring or a disc spring may be interposed between the rod (spring seat) and the bottom surface of the cylinder, and the rod may be pushed into the cylinder to use a spring load generated when the rod is compressed and deformed. . For example, the gantry 2 is protruded downward,
A spring unit that receives the compression coil spring provided as described above may be provided as shown in the conventional example. In order to prevent bending between the cylinder and the rod in this case, the outer cylinder surrounding the cylinder is integrated with the rod, and the outer peripheral surface of the cylinder and the inner peripheral surface of the outer cylinder are connected to each other. What is necessary is just to make it make sliding contact.

[0044]

As described above, according to the present invention, the spring length and the spring force of the spring body provided as the reaction force generating means for reducing the opening / closing operation can be reduced by setting the spring moment in at least one of the spring bodies. Since the changing means continuously changes the characteristics of the opening direction moment by the reaction force generating means, it is possible to arbitrarily change the characteristics of the opening direction, and to always realize a suitable opening / closing operation force reduction state corresponding to the variation and aging of the spring body. Further, by making the movement of the movable end provided in the tension length changing means linear, the structure can be simplified,
The tension length changing means can be configured with a simple structure, and the cost of the apparatus can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing an opening / closing body operating force reducing device to which the present invention is applied.

FIG. 2 is an enlarged view of a principal part taken along line II of FIG. 1;

FIG. 3 is a diagram showing a moment characteristic of the opening / closing body operating force reducing device according to the present invention.

FIG. 4 is a view similar to FIG. 1, showing a second embodiment.

FIG. 5 is an enlarged view of a principal part taken along line V of FIG. 4;

FIG. 6 is a sectional view of a main part showing a spring unit using a compression coil spring.

FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6;

FIG. 8 is a diagram showing another embodiment corresponding to FIG. 7;

FIG. 9 is a view similar to FIG. 6, showing a spring unit using a disc spring;

FIG. 10 is a side view showing a conventional opening / closing body operating force reducing device.

FIG. 11 is a diagram showing a moment characteristic of a conventional opening / closing body operating force reducing device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Base 2 stand, 2a pivot 3 link, 3a pin 4 opening and closing body 5 adjust bolt, 5a head, 5b outward flange part 6 movable connecting member, 6a connecting pin 7 spring unit 7a lower connecting part, 7b bifurcated part, 7c Upper connecting part 8a Small diameter cylindrical cover 8b Large diameter cylindrical cover 9 Tension coil spring 10 Scale plate 11 Lower spring support, 11a Side projecting shaft part 12 Annular boss part 13 Upper connecting member, 13a Side projecting shaft part 14 Upper part Spring support 15 Adjustment bolt 16 Window 21 Compression coil spring 22 Tube, 22a Slot 23 End plate 24 Rod, 24a Screw, 24b Head, 24c
Double chamfered part 25 Spring seat, 25a Radially outward projection 26 Disc spring 31 Casing, 31a Pivot part 32 Lid 33 Gas spring unit, 33a Cylindrical cylinder, 33
b Piston rod 34 Seal

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[Procedure amendment]

[Submission date] June 16, 1999 (1999.6.1
6)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

[0006]

However, in the gas spring unit 33, the piston rod 33b extending outward from the cylindrical cylinder 33a closes the open end surface of the cylindrical cylinder 33a. The seal portion 34 is provided by, for example, an O-ring in order to secure the sealing property of the sliding portion because the gas reciprocates in a direction penetrating the gas passage. There was a problem that the spring function deteriorated (the imaginary line in FIG. 11 ) and the balance function was impaired.

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] FIG.

[Correction method] Change

[Correction contents]

FIG. 10

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3D004 AA13 BA03 CA19 CA34 3E084 AA05 FA06 GA06 GB06 KA16 3J059 AD02 BA01 BA23 BB03 CB12 EA15 GA20 GA30 4E360 AB02 AB12 BA04 BA06 BB02 BB12 BB17 BB19 BB22 EB27 EB02 EC05 EA05 ED17 ED23 ED27 GA02 GA06 GA46 GB48 GB99

Claims (3)

[Claims] An opening / closing body is pivotally supported by a support unit integrated with the base so as to be tiltable with respect to the base, and a closing moment generated by its own weight when the opening / closing body is opened is reduced. An opening / closing body operating force reducing device provided with a reaction force generating means for generating a reaction force in a direction against the closing moment, wherein the reaction force generating means resists the closing moment of the opening / closing body. To generate the opening moment in the direction
A spring member provided between a position of the pivot portion separated from the pivot position from the pivot position and a position of the opening and closing member separated from the pivot position, to change a magnitude of the opening moment; An operating force reducing device for an opening / closing body, comprising an opening direction moment changing means provided between at least one of the positions and the spring body. 2. The fixing unit or the opening / closing body so that the spring body is formed of a spring that can be extended and contracted in the axial direction, and the opening direction moment changing unit continuously displaces the connection position of the spring body. 2. The opening / closing body operating force reduction according to claim 1, further comprising: a spring member connecting movable member provided at the separated position; and fixing means for fixing the movable member at an arbitrary position. apparatus. 3. The apparatus according to claim 1, wherein the spring body comprises a spring which can be extended and contracted in the axial direction, and the opening moment changing means keeps the initial load of the spring body continuously and freely changed. The operating force reducing device for an opening / closing body according to claim 1, further comprising a spring length changing means provided between the fixed portion or the separated position of the opening / closing body and the spring body.