JP2013159977A - Opening/closing device and manufacturing method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the durability of a torsion coil spring.SOLUTION: In an opening/closing device which comprises: a rotatably supported cylindrical winding body 30; a torsion coil spring 53 approximately concentrically provided in the winding body 30; and an opening/closing body 10 whose opening direction side end is fixed to the winding body 30, the opening/closing device winding up or drawing out the opening/closing body 10 by rotating the winding body 30 by an energizing force in accordance in a circumferential direction of the torsion coil spring 53 in accordance with the opening/closing motion of the opening/closing body 10, an axial one end side of the torsion coil spring 53 is fixed to an unrotatable part and the other end side thereof is fixed to the winding body 30 in an axially stretched state.

Description

  The present invention relates to an opening / closing device in which a winding body is rotated by an urging force of a torsion coil spring to open or close the opening / closing body.

Conventionally, in this kind of invention, for example, as disclosed in Patent Document 1, an opening / closing body (10) that opens and closes in the vertical direction, and the opening / closing body (10) is wound up or drawn out above the opening / closing body (10). The winding body (33), the torsion coil spring (biasing means 34) for urging the winding body (33) in the winding direction, and the fully-closed opening / closing body (10) are detachably engaged. There is an opening / closing device provided with an engaging / disengaging means (40) for stopping.
In this opening / closing device, when the opening / closing body (10) is closed and locked in the fully closed position by the engaging / disengaging means (40), the biasing force in the winding rotation direction is accumulated in the torsion coil spring (biasing means 34). The Therefore, if the engagement / disengagement means (40) is released while the opening / closing body (10) is fully closed, the winding body (33) is rotated in the winding direction by the biasing force of the torsion coil spring (biasing means 34). Then, the opening / closing body (10) is wound around the winding body (33) and the opening / closing body (10) is opened until it reaches the fully open position.

By the way, the torsion coil spring used in the opening / closing device as described above is formed between a wire wound in an annular shape and a wire wound adjacent to the wire wound (hereinafter, between adjacent wires). Are in close contact or close to close contact.
Therefore, when the torsion coil spring is wound in the winding direction in order to accumulate urging force, the torsion coil spring tends to extend in the axial direction (in other words, the center line direction of the torsion coil spring), and the strands are in sliding contact with each other. . More specifically, for example, when the torsion coil spring is in a completely free state (in other words, a state where no torsion load is applied), the one end side of the torsion coil spring is fixed and the other end side is fixed. When one turn is wound in the winding direction, the torsion coil spring tends to extend in the axial direction by the outer diameter of the strand. For this reason, when the torsion coil spring is twisted in a state where both ends thereof are fastened, the torsion coil spring cannot be stretched, and the strands are pressed against each other and rubbed or curved (meandered) with respect to the axis.

  In the conventional switchgear, as described above, the torsion coil spring is worn or broken due to the sliding contact between the strands of the torsion coil spring or the bending with respect to the axis, There is a possibility that the torsional force may be reduced due to the bending or the like, or that the inner peripheral surface or outer peripheral surface of the curved torsion coil spring may be in sliding contact with another member (for example, a fixed shaft or the like).

JP 2007-31515 A

  This invention makes it an example of a subject to cope with such a problem. That is, to prevent sliding contact between the strands of the torsion coil spring, to prevent wear and damage of the torsion coil spring, to prevent the torsion coil spring from bending, to maintain the biasing characteristics of the torsion coil spring well, An object of the present invention is to improve the durability of the torsion coil spring and to stably maintain the opening / closing operation by the biasing force of the torsion coil spring for a long period of time.

  One means for solving the above problems is a cylindrical winding body supported rotatably, a torsion coil spring provided substantially concentrically within the winding body, and winding around the winding body. An opening / closing body that is pushed or drawn out, wherein the winding body is rotated by a circumferential biasing force of the torsion coil spring in accordance with an opening / closing operation of the opening / closing body. One end side in the axial direction is fixed to the non-rotatable portion, and the other end side is fixed to the winding body in a state of being pulled in the axial direction.

Since the present invention is configured as described above, the following effects can be obtained.
Since the torsion coil spring is fixed in a state of being pulled in the axial direction, it is easy to ensure a gap between the strands of the torsion coil spring. Therefore, it is possible to prevent the torsion coil spring from being pressed and rubbed between the strands, to bend the torsion coil spring and to be in sliding contact with other members, and to improve the durability of the torsion coil spring. The opening / closing operation by the urging force of the torsion coil spring can be stably maintained for a long time.

It is principal part sectional drawing which shows an example of the switchgear concerning this invention. It is a top view which shows the state which mounted | wore the torsion coil spring with the fixed axis | shaft. It is a top view which shows the torsion coil spring before mounting to a fixed shaft. It is a perspective view which shows an edge part side rotation support member. It is a perspective view which shows a spring fixing member. It is a perspective view which shows a center side rotation support member. It is a principal part perspective view which shows a winding body. It is sectional drawing which shows the fastening structure of a winding body and an opening-closing body. It is a perspective view showing an example of a jig for assembling a torsion coil spring to a fixed shaft. It is a perspective view which shows the state before attaching a torsion coil spring cyclically | annularly to a fixed axis | shaft. It is a perspective view which shows the state which has twisted the torsion coil spring with which the fixed axis | shaft was mounted | worn. It is a schematic diagram which shows an example of the switchgear concerning this invention from the side. It is a schematic diagram which shows the other example of the switchgear concerning this invention from the side.

In order to carry out the present invention, in the first embodiment, a cylindrical winding body supported rotatably, a torsion coil spring provided substantially concentrically within the winding body, and the winding body An opening / closing body that is wound or unwound, wherein the winding body is rotated by a biasing force in a circumferential direction of the torsion coil spring in accordance with an opening / closing operation of the opening / closing body. One end side in the axial direction of the coil spring was fixed to the non-rotatable portion, and the other end side was fixed to the winding body while being pulled in the axial direction.
Here, the “circumferential direction” means the direction of the outer periphery of the torsion coil spring.
The “winding direction” means a direction in which the winding body rotates to wind up the opening / closing body. The “feeding direction” means a direction opposite to the “winding direction” and a direction in which the winding body rotates to feed out the opening / closing body.
The “non-rotatable portion” may be a portion that does not rotate relative to the rotatable winding body. Specifically, the fixed portion is fixed to the immovable portion so as to rotatably support the winding body. Examples include a shaft, a bracket and a case for supporting or storing the winding body.
According to this aspect, since the torsion coil spring is fixed in a state of being pulled in the axial direction, a gap is secured in advance between the strands of the torsion coil spring. For this reason, when twisting or restoring the torsion coil spring, it is possible to prevent the strands from coming into sliding contact with each other or from deforming the torsion coil spring so as to wave.

  In the second embodiment, the torsion coil spring is configured such that the opening / closing body is moved from the fully open position to the fully closed position so as to prevent sliding contact between the strands of the torsion coil spring in the range from fully open to fully closed. It is pulled in the axial direction so that the strands do not contact while moving the range.

In the third embodiment, the other end side of the torsion coil spring is fixed to the winding body while being twisted a predetermined number of times in the winding direction of the torsion coil spring and pulled in the axial direction.
According to this embodiment, the torsion coil spring stores in advance the restoring force for a predetermined number of times of twisting. Therefore, the restoring force of the torsion coil spring can be effectively used from the initial state of the switchgear. For example, in the initial state of the switchgear, the fully open state or the closed state of the switchgear is maintained by the restoring force. be able to.
Further, if the torsion coil spring in which the restoring force corresponding to a predetermined number of times of twisting is previously stored is further twisted by an opening operation or a closing operation, the restoring force can be increased.
The “winding direction of the torsion coil spring” is a winding direction when winding the wire in a coil shape in the manufacturing stage of the torsion coil spring alone.

In the fourth embodiment, in order to further reduce the sliding contact between the strands, the torsion coil spring is pulled so as to be longer than the length extending in the axial direction by being twisted a number of times from the free state. Yes.
Here, the “free state” means a state in which no torsional load is applied to the torsion coil spring (a state before twisting), and a state similar to a state in which one end side or both end sides of the torsion coil spring are not fixed. It is.
In addition, to explain the “length extending in the axial direction by being twisted from the free state by the number of twists”, twisting a general torsion coil spring in which the strands are close to each other in close contact or close contact In this case, even if the torsion coil spring is not pulled in the axial direction, the axial length of the torsion coil spring becomes longer according to the amount of torsion. The “length extending in the axial direction by being twisted a number of times from the free state” means the axial length (full length) of the torsion coil spring when twisted without being pulled in the axial direction.

In the fifth embodiment, the torsion coil spring extends in the axial direction by being twisted a number of times in the winding direction from the free state in order to further reduce sliding contact between the strands and to obtain good torsion spring characteristics. It is pulled so as to be longer than the length by 1 to 3 times the outer diameter of the strand of the torsion coil spring.
When the dimension is made smaller than 1 times the outer diameter of the strands, the sliding contact between the strands increases, which may significantly impair the durability of the torsion coil spring.
Further, when the dimension is larger than three times the outer diameter of the strand, the torsion coil spring bends like a wave, and the inner or outer member of the torsion coil spring (for example, a fixed shaft or a winding body) Etc.).

In a sixth aspect, the apparatus includes a guide shaft that guides the opening / closing body along the half-half side in a crossing direction with respect to the opening / closing body opening / closing direction, and the winding body is separated from the guide shaft in the crossing direction. The opening / closing body provided by the guide shaft and guided by the guide shaft is wound up.
That is, conventionally, in an opening / closing device in which the opening / closing body guided in the intersecting direction by the guide shaft is wound around the winding body, the winding body is wound and rotated by the weight of the weight body. However, in this embodiment, since the winding body is wound and rotated by a torsion coil spring without using a weight body, the weight body and the space for moving the weight body up and down can be omitted. .

In the seventh embodiment, an engagement recess opening in the tangential direction of the winding body is provided on the outer peripheral portion of the winding body, and the opening direction side end of the opening / closing body is fitted into the engagement recess. I stopped.
According to this aspect, the fastening strength between the outer periphery of the winding body and the opening / closing body can be secured so that the outer periphery of the winding body and the opening / closing body can be easily fixed and the urging force of the torsion coil spring can be withstood. Can be improved.

In an eighth aspect, the opening / closing body includes a base portion fixed to the outer peripheral portion of the winding body and an opening / closing body main body detachably connected to an end portion in the closing direction of the base portion.
According to this form, it becomes possible to selectively connect an opening / closing body body having a different length in the opening / closing direction to the base using the base as a common component, and consequently the length of the opening in the opening / closing direction. Correspondence to different sites can be facilitated. Further, when the opening / closing body main body is damaged, the opening / closing body main body can be detached and easily replaced with a new one.

  In the ninth embodiment, as a specifically preferred embodiment, the non-rotatable portion is a fixed shaft that is disposed on the center side of the winding body and is fixed to the non-movable portion at both ends, and the torsion coil spring includes: A ring is provided around the fixed shaft, and the winding body is rotated in the winding direction by a restoring force in the circumferential direction.

  In the manufacturing method of the tenth aspect, the one end side of the torsion coil spring is detachably secured to the fixed shaft, and the other end side of the torsion coil spring is twisted and pulled in the winding direction by the number of twists. A step of fixing the fixed shaft closer to the center in the axial direction, a step of fixing the one end of the torsion coil spring to the winding body, and a step of removing the one end of the torsion coil spring from the fixed shaft Including.

Note that some of the above-described forms can be independent inventions that do not include a part of the configuration of the form described above.
That is, according to one of the independent inventions, in the opening / closing device provided with a cylindrical winding body that is rotatably supported and an opening / closing body that is wound on or fed out from the winding body, An engagement recess opening in the tangential direction of the winding body is provided in the outer peripheral portion of the take-up body, and the opening direction side end of the opening / closing body is fitted into the engagement recess and fixed. .
According to the present invention, the outer periphery of the winding body and the opening / closing body can be easily fixed, and the fixing strength between the outer periphery of the winding body and the opening / closing body can be improved.

Further, as another independent invention, in an opening / closing apparatus comprising a cylindrical winding body supported rotatably and an opening / closing body wound around or drawn out from the winding body, the opening / closing body Is composed of a base portion fixed to the outer peripheral portion of the winding body and an opening / closing body main body detachably connected to an end portion in the closing direction of the base portion.
According to the present invention, it is possible to selectively connect an opening / closing body body having a different length in the opening / closing direction to the base using the base as a common component, and consequently, the length of the opening in the opening / closing direction. Correspondence to different sites can be facilitated. Further, when the opening / closing body main body is damaged, the opening / closing body main body can be detached and easily replaced with a new one.

In the present specification, the “opening / closing body thickness direction” means the thickness direction of the opening / closing body in the closed state.
In the present specification, the “opening / closing body width direction” means a direction that is substantially orthogonal to the opening / closing direction of the opening / closing body and not the thickness direction of the opening / closing body.
Further, in this specification, the “opening / closing body opening / closing direction” means a direction in which the opening / closing body slides to partition or open the space.

  Hereinafter, a particularly preferred embodiment of the above embodiment will be described in detail based on the drawings.

  The opening / closing device 1 includes an opening / closing body 10 (see FIG. 12) that opens and closes by partitioning or opening a space in the vertical direction, and a guide rail that surrounds the widthwise end of the opening / closing body 10 and guides it in the opening / closing direction. (Not shown), a guide shaft 20 that guides the opening / closing body 10 along the upper half side in a crossing direction with respect to the opening / closing direction, and a support shaft rotatably supported at a position separated from the guide shaft 20 in the crossing direction. A cylindrical winding body 30 and a fixed shaft which is provided substantially concentrically on the center side in the winding body 30 to rotatably support the winding body 30 and whose both ends are fixed to immobile parts. 40 (see FIGS. 1 and 2) and a spring assembly 50 (see FIGS. 1 to 3) attached to the fixed shaft 40 in an annular shape, and the winding body 30 is attached to the spring assembly 50 in accordance with the opening / closing operation of the opening / closing body 10. The opening / closing body 10 is rotated around the outer periphery of the winding body 30 by the biasing force in the circumferential direction. Wound or or feeding.

The opening / closing body 10 includes a base 11 fixed to the outer peripheral portion of the winding body 30 and an opening / closing body main body 12 detachably connected to an end of the base 11 in the closing direction.
Each of the base 11 and the opening / closing body 12 includes, for example, a flame retardant fabric such as a glass cloth or a silica cloth, a fluorine-treated vinyl chloride resin sheet material, a synthetic resin sheet material containing glass fiber, or the like. And a flexible sheet material having fire resistance (including flame retardancy) as necessary.
The base portion 11 is formed in a rectangular shape with a length that wraps around the outer periphery of the winding body 30 from one half to one and a half times, and the upper end portion thereof is inserted into the engaging recess 31 on the outer periphery of the winding body 30 to be fastened. .
The opening / closing body 12 is formed in a rectangular shape that covers the substantially entire surface of the housing opening when fully closed, and is detachably connected to the lower end of the base 11 via an attaching / detaching means 13.

According to a preferred example shown in the figure, the attaching / detaching means 13 is a velvet fastener composed of a detachable engaging piece and an engaged piece, and the engaging piece is disposed on the upper end side of the opening / closing body main body 12 in a substantially total length in the lateral width direction. The engaged piece is fixed to the lower end side of the base 11 over substantially the entire length in the lateral width direction.
As other examples of the attaching / detaching means 13, a button, a hook, a hook, a hole capable of engaging / disengaging the hook, two members that can be attached and detached, and the like can be used.

  At the end of the opening / closing body main body 12 in the closing direction, a seat plate portion 12a is provided for contacting a seating target portion (a floor surface, a lower frame, etc., not shown) when the opening / closing body 10 is fully closed. The seat plate portion 12a is formed with a bag-like end in the closing direction of the opening / closing body main body 12 in the opening / closing body width direction, and a weight member (for example, a sand bag or a rod-like member) is formed inside the bag-like portion. And the like. The seat plate portion 12a pulls the opening / closing body 12 downward due to its weight, prevents the opening / closing body 12 from being bent, wrinkled, etc. The opening / closing body 10 is closed.

  In addition, on the end side in the width direction of the opening / closing body 12, a protruding retaining member that prevents the opening / closing body 10 from being pulled out from the guide rail (not shown) in the width direction, if necessary, An engaging portion (not shown) or the like that fits in an uneven shape is provided to the engaged portion 21 (see FIG. 12) on the axial end portion side of the guide shaft 20 to be performed.

The guide shaft 20 is a long cylindrical member extending in the lateral width direction on the upper side of the opening / closing body 10, and is rotatably supported with respect to a stationary part such as a storage case or a bracket. An engaged portion 21 that can be engaged with and disengaged from the engaging portion of the opening / closing body main body 12 is provided on the end side in the axial direction of the guide shaft 20 as necessary. According to the illustrated example, the engaged portion 21 is formed in a gear shape or a sprocket shape.
Further, a drive source (for example, a rotary motor such as a tubular motor) that rotates the guide shaft 20 in the winding direction and a rotational force of the drive source are appropriately provided inside and / or outside the guide shaft 20. A power transmission mechanism (for example, a mechanism using a chain and a sprocket, a gear mechanism, or the like) that adjusts and transmits the guide shaft 20 is provided.

Further, the winding body 30 is a substantially cylindrical member that extends over substantially the entire length in the width direction of the opening / closing body 10 and is supported so as to freely rotate in both directions around a fixed shaft 40 described later.
The winding body 30 is formed in a substantially cylindrical shape from an aluminum alloy material or the like, and has an engagement recess 31 for fastening the upper end of the opening / closing body 10 on its peripheral wall, and an end-side rotation support member 51 described later. , 51 ′ (see FIGS. 1 and 4), a plurality of fitting portions 32 for fitting to the center side rotation support member 70 (see FIG. 6), a plurality of ribs 33 projecting inward, and the like.

  The engagement recess 31 is a recess whose opening is directed in the tangential direction, and is provided continuously over the entire length of the winding body 30 (see FIG. 7).

According to the illustrated example, the fitting portion 32 is formed in a trapezoidal cross section, has a convex shape that continues over the entire length of the winding body 30 on the inner peripheral surface side, and the entire length of the winding body 30 on the outer peripheral surface side. A through hole 32a through which a fastener (for example, a bolt or a screw) is inserted is provided inside the concave portion (see FIG. 7).
The convex inner peripheral surface of the fitting portion 32 is used to stop outer peripheral surfaces of end side rotation support members 51 and 51 '(see FIGS. 1 and 4) and a center side rotation support member 70 (see FIG. 6), which will be described later. It fits into the receiving recesses 51a1 and 71a. And the fastening tool (for example, a volt | bolt, a screw, etc.) penetrated by the said through-hole 32a is fastened by the said edge part side rotation support member 51, 51 '.
According to this fitting part 32, since the outer peripheral surface side is concave, it is possible to prevent the head of the fastening tool from projecting in the centrifugal direction from the outer peripheral surface of the winding body 30, and on the inner peripheral surface side. The convex portion is fitted to the end-side rotation support members 51 and 51 ′ and the center-side rotation support member 70, and is held so as to be rotatable together with these rotation support members.

  Further, according to the illustrated example, the ribs 33 are a pair of parallel protrusions extending over the entire length in the axial direction of the winding body 30, and a plurality of sets are provided at intervals on the inner peripheral surface of the winding body 30 in the circumferential direction. . These ribs 33 reinforce the winding body 30 and fit into end side rotation support members 51 and 51 ′ and a center side rotation support member 70 described later.

The fixed shaft 40 is a hollow shaft-shaped cylindrical body that is inserted into the center side of the winding body 30 and protrudes from both ends of the winding body 30, and both end portions thereof are storage cases, brackets, and the like. The non-rotatable part which cannot rotate with respect to the winding body 30 is comprised by being fixed to an immobile part.
The fixed shaft 40 has a plurality of through holes 41 to 47 (see FIGS. 1 and 9) for fixing left and right end side rotation support members 51, 51 ′ and a center side rotation support member 70 described later. , Provided at intervals in the axial direction.
The through holes 41 and 47 at both ends of the fixed shaft 40 are fastening holes for fixing the fixed shaft 40 to a fixed part such as a dedicated jig A or a storage case described later.
The through hole 42 is a hole for inserting the positioning pin 65, the through hole 43 is a hole for inserting the temporary fixing pin 61, the through hole 44 is a hole for inserting the fastening tool 63, and the through hole 45 is fixed A hole for inserting the tool 68 and a through hole 46 are holes for inserting the fastening tool 62. Among these holes, the through holes 41, 42, 43, 46 and 47 are previously drilled before assembly. The through holes 44 and 45 are formed during assembly work described later.

  One end side rotation support member 51 is annularly attached to one end side (the left end side according to FIG. 1) of the fixed shaft 40, and constitutes a spring assembly 50.

  As shown in FIG. 3, the spring assembly 50 includes an end-side rotation support member 51 disposed on one end side in the axial direction, and a spring disposed at an interval in the axial direction with respect to the end-side rotation support member 51. A fixing member 52; a torsion coil spring 53 mounted between the end side rotation support member 51 and the spring fixing member 52; and a cylindrical liner 54 provided inside the torsion coil spring 53. It is configured integrally.

The end-side rotation support member 51 is a member that supports the winding body 30 from the inner peripheral surface side in cooperation with the center-side rotation support member 70. As shown in FIG. A bear rig 51b provided in the support body 51a, an annular bearing set plate 51c for holding the bear rig 51b in a predetermined position, and a rotation stopper fixed to the support body 51a so as to cover the bearing set plate 51c It is comprised integrally with the member 51d.
The end-side rotation support member 51 is rotatably mounted on the fixed shaft 40 via the bear rig 51b. Before the opening / closing device 1 is installed on the site, the torsion coil spring 53 is used. In a state of being urged in the winding rotation direction, the rotation stopping member 51d and the temporary fixing pin 61 penetrating through the fixed shaft 40 are temporarily unable to rotate.

As shown in FIG. 4, the support portion main body 51 a constituting the end-side rotation support member 51 fits into the fitting portion 32 of the winding body 30 at the maximum diameter portion that receives the inner peripheral surface of the winding body 30. A spring fixing portion 51a3 for fixing the end portion of the torsion coil spring 53 to the center side of the winding body in the axial direction has a fixing recess 51a1 and a recess 51a2 that fits into the rib 33 in the winding body 30. Have
The fastening recess 51a1 is recessed with respect to the maximum diameter portion, opens the central side of the winding body 30 (right side according to FIG. 1), has an end face 51a11 on the opposite side, and winds up at the bottom portion. A screw hole 51a12 is provided for screwing the fastening tool penetrating the body 30.
Further, the recess 51a2 is recessed with respect to the maximum diameter portion, opens the central side of the winding body 30 (right side according to FIG. 1), and has an end face 51a21 on the opposite side.
And the end surface 51a11 in the said recessed part in the support part main body 51a and the end surface 51a21 of the recessed part 51a2 contact | abut to the edge part of the fitting part 32 in the winding body 30, and the edge part of the rib 33, respectively, and the winding body 30 There is an effect of positioning in the axial direction.
The spring fixing portion 51 a 3 is formed in a male screw shape so as to be screwed and fixed to one end side of the torsion coil spring 53.

  Further, the bear rig 51 b is a ball bear rig, and rotatably supports the support portion main body 51 a with respect to the fixed shaft 40.

Further, the rotation stopping member 51d is fixed to the support portion main body 51a so as to be non-rotatably coaxial with a fixing device (bolts or screws in the illustrated example). According to the illustrated example, the rotation stopping member 51d includes a disk-shaped portion fixed to the end surface of the support body 51a, a cylindrical portion that protrudes from the disk-shaped portion in the axial direction and fits to the outer periphery of the fixed shaft 40. These two members are integrally formed by welding or the like.
A through hole 51d1 (see FIG. 4) for inserting a temporary fixing pin 61 (see the left side in FIG. 1) or a fastening tool 62 (see the right side in FIG. 1) is provided in the cylindrical portion of the rotation stopping member 51d. .

  The spring fixing member 52 is annularly attached to the fixed shaft 40 at the other end side (the right end side according to FIG. 1) of the torsion coil spring 53, and the other end side of the torsion coil spring 53 is fixed to the fixed shaft 40. It is a substantially cylindrical member to be fixed. As shown in FIG. 5, the spring fixing member 52 includes a spring fixing portion 52 a that is screwed and fixed to the other end side of the torsion coil spring 53, and a fastening member 63 (see FIG. 1). ) And the fastening portion 52b fastened and fixed together.

The spring fixing portion 52 a is formed in a male screw shape that is screwed to the other end side of the torsion coil spring 53.
The fastening portion 52b is formed in a prismatic shape (in the illustrated example, a quadrangular prism shape) so that the amount of rotation around the fixed shaft 40 and the circumferential position can be easily grasped visually.

The fixing part 52b is provided with a through hole 52b1 for inserting a fixing tool 63 (bolt in the illustrated example) and a fixing hole 52b2 for detachably attaching a handle 64 (see FIG. 11). It is done.
A plurality of through holes 52b1 are provided at different angles in the circumferential direction so as to be selectively used, and according to the illustrated example, four through holes 52b1 are provided at every 90 degrees.
The fastening holes 52b2 are formed, for example, in the form of a female screw to which the handle 64 is screwed so that the handle 64 can be attached and detached. A plurality of fastening holes 52b2 are provided in the circumferential direction of the fastening portion 52b. Two are provided so as to be arranged.

  Further, the torsion coil spring 53 is configured to generate an urging force by twisting the other end side in a state where one end side in the axial direction is fixed. According to the illustrated example, adjacent to or in close contact between adjacent strands. This is a substantially fully adhered coil spring (see FIGS. 1 to 3). Therefore, when the other end side is twisted, for example, by one turn from a free state in which one end side in the axial direction is fixed, the torsion coil spring 53 is equivalent to the outer diameter w of the wire constituting the torsion coil spring 53 (see FIG. 3)) in the axial direction.

  The cylindrical liner 54 is a cylindrical member that is annularly attached to the outer peripheral surface of the fixed shaft 40 inside the torsion coil spring 53. When the torsion coil spring 53 is bent, the cylindrical liner 54 is attached to the fixed shaft 40. Prevents damage from direct contact. The cylindrical liner 54 is made of, for example, a synthetic resin material having good wear resistance.

The spring assembly 50 having the above-described configuration is annularly mounted on the outer periphery of the fixed shaft 40 by an assembly procedure described in detail later, and the center side of the winding body (the right end side according to FIG. 1) cannot rotate with respect to the fixed shaft 40. At the same time, while the torsion coil spring 53 is twisted, the reverse end side (left end side according to FIG. 1) is temporarily fixed to the fixed shaft 40 by the temporary fixing pin 61.
In FIG. 1, reference numeral 65 denotes a positioning pin (for example, a split pin) that restricts movement of the spring assembly 50 and the winding body 30 in the axially outer side (left side according to FIG. 1), and reference numeral 66 denotes It is an annular spacer that is interposed between the positioning pin 65 and the rotation stopping member 51d and protects the end of the rotation stopping member 51d.

Further, the center side rotation support member 70 that supports the winding body 30 in cooperation with the end side rotation support member 51 includes a support body 71 and a bear rig 72 (for example, provided in the support body 71). Ball bearing).
The support portion main body 71 is fitted in the fitting portion 32 of the winding body 30 at the maximum diameter portion that receives the inner peripheral surface of the winding body 30 in the same manner as the support portion main body 51a of the end side rotation support member 51. It has a substantially trapezoidal concave recess 71a (see FIG. 6) that fits and a substantially rectangular concave recess 71b that fits into the rib 33 in the winding body 30.

1 and 2, the center-side rotation support member 70 having the above-described configuration is annularly mounted on the fixed shaft 40 so as to be positioned on the center side in the axial direction of the winding body 30, The portion is sandwiched between the spring assembly 50 and the positioning sleeve 67 and positioned in the axial direction. The positioning sleeve 67 is fixedly fixed to the fixed shaft 40 by a fastening tool 68.
Therefore, the center-side rotation support member 70 is rotatable with respect to the fixed shaft 40 via the bear rig 72 and is held so as not to move in the axial direction.
A winding body 30 is annularly mounted on the outer peripheral portion of the center side rotation support member 70, and supports the winding body 30 so as to be integrally rotatable.

The other end-side rotation support member 51 ′ (right side according to FIG. 1) is provided in the support-portion main body 51a and the support-portion main body 51a having the same configuration as that of the end-side rotation support member 51. 1 and an annular bearing set plate 51c for holding the bear rig 51b in a predetermined position. The bearing set plate 51c is attached to the fixed shaft 40 in an annular shape. In other words, it is held so as not to move outward in the axial direction by a cylindrical positioning sleeve 69 mounted on the right side). The positioning sleeve 69 is fixedly fixed to the fixed shaft 40 by a fastening device 62 (bolts and nuts in the illustrated example).
According to the above configuration, the end-side rotation support member 51 ′ is held so as to be rotatable with respect to the fixed shaft 40 and immovable in the axial direction.
A winding body 30 is annularly mounted on the outer peripheral portion of the end side rotation support member 51 ′ and fixed in a stationary manner by a fastening tool (not shown) (for example, a bolt or a screw).

Next, an example of an assembly procedure of the winding body 30, the fixed shaft 40, the spring assembly 50, and the like configured as described above will be described in detail (see FIGS. 9 to 11).
First, the fixed shaft 40 is fixed to the dedicated jig A. The dedicated jig A is disposed so as to face the support portion A1 and the other support portion A2 with a space therebetween.
One end side (the left end side according to FIG. 9) and the other end side of the fixed shaft 40 are fixed to each other so as to be non-movable in the axial direction and non-rotatable with respect to the support portion A1 and the support portion A2, respectively. It is detachably fixed by screws and bolts).

Next, through holes 44 and 45 are formed at a position of dimension L1 from one end of the fixed shaft 40 and a position of dimension L2 from the position (see FIG. 9). In the drawing, the through holes 42 and 43 are previously drilled at predetermined positions before the assembly procedure.
The dimension L1 is set in advance according to the free length of the torsion coil spring 53. For example, an operator may read from the dimension table in which the dimension L1 is set corresponding to the free length of the torsion coil spring 53. do it.
The dimension L2 is the fastening member 63 (or the penetration) of the spring fixing member 52 when the spring fixing member 52, the center side rotation support member 70, and the positioning sleeve 67 are mounted around the fixing shaft 40 and brought into contact with each other in the axial direction. The fixed dimension is set to be approximately equal to the pitch between the hole 52b1) and the fastening tool 68 (or the through hole) of the positioning sleeve 67 (see FIG. 1).

The L1 may have a single fixed dimension when the opening / closing body width does not vary from site to site, and may be drilled in advance before assembly.
As another example, three or more through holes 44 and 45 are provided at predetermined intervals in the axial direction of the fixed shaft 40 so that the through holes 44 and 46 are selectively used. It is possible to save work.

  Next, one end side of the fixed shaft 40 is temporarily removed from the support portion A1, and as shown in FIG. 10, a positioning sleeve 67, a center-side rotation support member 70, a spring assembly 50, Annular spacers 66 are sequentially mounted. Thereafter, the one end side of the fixed shaft 40 is returned to the state fixed to the support portion A1.

  Next, the positioning pin 65 is inserted and fixed to the one end side (the left end side in the illustrated example) of the fixed shaft 40, and the annular spacer 66 and the spring assembly 50 are brought closer to the positioning pin 65 side (see FIG. 11). . Then, the end-side rotation support member 51 moves in the axial direction with respect to the fixed shaft 40 by inserting the temporary fixing pin 61 into the rotation-stopping member 51 d of the end-side rotation support member 51 and the fixed shaft 40 on the one end side. Temporarily fixed in an impossible and non-rotatable state.

  Next, the handles 64 and 64 are attached to the spring fixing member 52 on the other end side of the spring assembly 50 like a handle (see FIG. 11). It should be noted that the procedure for attaching the handle 64 may be performed at other time points such as before the spring assembly 50 is mounted on the fixed shaft 40.

Next, the other end side (the right end side according to FIG. 11) of the spring assembly 50 is twisted in the winding direction of the torsion coil spring 53 for a predetermined number of twists and pulled in a predetermined amount in the axial direction, and the spring assembly 50 and others. The fastening tool 63 is inserted into the end-side spring fixing member 52, and the fastening tool 63 is fixed to the fixed shaft 40 so that it cannot move in the axial direction and cannot rotate. Therefore, the spring assembly 50 is in a state in which the urging force in the circumferential direction by the torsion coil spring 53 is accumulated.
Here, the “winding direction of the torsion coil spring 53” is a winding direction when winding the wire in the form of a coil in the manufacturing stage of the torsion coil spring 53 before the assembly operation, and is an example of FIG. According to this, it is the clockwise direction when viewed from the left side in the axial direction.
In this operation, the spring assembly 50 may be pulled in the axial direction by a predetermined amount after the spring assembly 50 is twisted a predetermined number of times. Alternatively, the spring assembly 50 may be pulled a predetermined amount while being twisted a predetermined number of times. You may make it twist a predetermined number of times after pulling fixed amount.

  The number of twists is such that when the opening / closing body 10 is changed from the fully closed state to the fully opened state, the winding body 30 is rotated by the urging force of the torsion coil spring 53 so that the entire opening / closing body 10 can be wound around the winding body 30. It is adjusted appropriately. More specifically, the number of twists is determined by the appropriate number of twists (for example, 10 to 10), for the number of times the winder 30 rotates when all the fully-closed opening / closing members 10 are wound on the winder 30. It is a value obtained by adding about 15 windings). The number of twists to be added is a value set in advance by experiment or calculation so that the winding body 30 generates a torque sufficient to smoothly wind the opening / closing body 10 from fully closed to fully open.

In the above operation, the amount by which the spring assembly 50 is pulled is the position where the spring fixing member 52 pulled in the axial direction is fixed, that is, the position of the through hole 44 (see FIG. 9) drilled in the fixing shaft 40 in the above procedure. It depends on. This position is set so that the torsion coil spring 53 is longer than the length extending in the axial direction by being twisted by the number of twists without being pulled from the free state.
That is, since the torsion coil spring 53 is formed in a fully contacted state in a free state, when one end side of the torsion coil spring 53 is fastened and the other end side is twisted by the number of twists, the torsion coil spring 53 is Even without being pulled by an external force, it extends in the axial direction by the length of “the number of twists × the outer diameter w of the wire”. According to the working procedure of the present embodiment, the torsion coil is further expanded by 1 to 3 times, preferably twice the outer diameter w of the torsion coil spring 53 from the state in which the torsion coil spring 53 is extended in this way. The spring 53 is pulled so as to be long, and the spring fixing member 52 is fixed to the axial center of the fixed shaft 40 by the fixing tool 63.

That is, when the torsion coil spring 53 is pulled, the torsional state becomes uneven due to the partial reduction in the diameter D, etc., and a coarse-dense state having a dense part and a coarse part is formed.
The amount of tension of the torsion coil spring 53 is appropriately adjusted so that, for example, when the state becomes the dense state, even if the spring wires are close to each other at a dense portion, they do not come into contact with each other. Furthermore, the amount of tension of the torsion coil spring 53 is preferably adjusted so that the spring wire does not come into contact with the fixed shaft 40 and the cylindrical liner 54 even in a meandering state. Here, the term “not in contact” means that the spring element wire is contacted or fixed to the spring element wire due to vibration or the like during the winding or unwinding of the torsion coil spring 53 accompanying the opening / closing operation of the opening / closing body 10. Even if there is a slight contact with the shaft 40 or the cylindrical liner 54, the frequency and time are scarce and include the case where the contact is not substantially made.
If the adjustment is made as described above, the number of twists of the torsion coil spring 53 decreases with the opening operation of the opening / closing body 10 from the fully closed position, the space between the spring element wires expands, and the torsion coil Since the inner diameter d of the spring 53 is increased, contact between the spring wires and contact between the torsion coil spring 53 and the fixed shaft 40 or the cylindrical liner 54 can be avoided.
From this point of view, the torsion coil spring 53 of this embodiment is pulled in the axial direction so that the strands do not come into contact while the opening / closing body 10 moves in the range from the fully open position to the fully closed position. More preferably, the dimension is 1 to 3 times, preferably about 2 times, the strand outer diameter w of the torsion coil spring 53 than the length extending in the axial direction by being twisted in the winding direction from the free state. It is pulled in the axial direction so as to be longer only.

Next, the central rotation support member 70 and the positioning sleeve 67 are brought closer to the spring fixing member 52 side, and the positioning sleeve 67 is fixed to the fixed shaft 40 by the fixing tool 68.
Therefore, the spring assembly 50 is held in a state where the urging force in the winding direction and the tensile force in the axial direction are accumulated in the torsion coil spring 53.

Next, one end and / or the other end side of the fixed shaft 40 is removed from the dedicated jig A, and the winding body 30 is disposed around the end side rotation support members 51 and 51 ′ and the center side rotation support member 70. It is mounted in an annular shape and fixed by a fastening tool (not shown) such as a bolt or a screw.
That is, in this state, one end side (right end side according to FIG. 1) of the torsion coil spring 53 is fixed to the fixed shaft 40 (non-rotatable portion), and the other end side (left end side according to FIG. 1). ) Is fixed to the winding body 30 while being twisted a predetermined number of times and pulled in the axial direction.

  Next, the integrated winding body 30, the fixed shaft 40, the spring assembly 50, and the like are completely removed from the dedicated jig A. Then, both end portions of the fixed shaft 40 are disposed at positions spaced apart from the guide shaft 20 in a substantially horizontal direction in a storage case (not shown) for storing the opening / closing body 10 when opened (see FIG. 12). It is fixed to a stationary part (for example, a bracket or the like) in the storage case.

  Next, the opening / closing body 10 is hung on the upper half side of the guide shaft 20, and the opening direction side end of the opening / closing body 10 is fixed to the outer peripheral surface of the winding body 30 (see FIG. 12). Specifically, as described above, the opening direction side end portion of the opening / closing body main body 12 is fixed to the closing direction side end portion of the base 11 fixed to the winding body 30 in advance through the attaching / detaching means 13. (See FIG. 8).

  Next, in the fully closed state in which the closing direction end of the opening / closing body 10 is brought into contact with the seating target site, the temporary fixing pin 61 on the one end side of the fixed shaft 40 is pulled out, so that the end side rotation support member of the spring assembly 50 is removed. 51 is made rotatable with respect to the fixed shaft 40, and the assembly work is completed. In the fully closed state, the winding body 30 is biased in the winding rotation direction by the restoring force of the torsion coil spring 53.

Next, the operation and effect of the opening and closing operation of the opening / closing device 1 will be described. In the fully closed state, the guide shaft 20 is rotated in the winding direction (clockwise according to FIG. 12) by driving a driving source (not shown). In this case, the base end side of the opening / closing body 10 that opens in accordance with the rotation is wound around the winding body 30 that rotates by the restoring force of the torsion coil spring 53.
Further, when the opening / closing body 10 is closed by rotating the guide shaft 20 in the feeding direction by driving of a driving source (not shown), the opening / closing body 10 is fed out from the winding body 30 and the winding body 30 is fed out. Accordingly, the urging force in the torsional direction is accumulated in the torsion coil spring 53.
Thus, although the torsion coil spring 53 repeats the rotation in the torsional direction and the rotation in the restoring direction in accordance with the opening / closing operation of the opening / closing body 10, the torsion coil spring 53 is pulled in the axial direction by the fastening structure. Therefore, a gap is secured between the strands of the torsion coil spring 53. For this reason, this gap can prevent the strands of the torsion coil spring 53 from being pressed against each other and rubbed, or the torsion coil spring 53 can be curved and slidably contact other members. The durability of the coil spring 53 can be improved, and the opening / closing operation by the biasing force of the torsion coil spring 53 can be stably maintained for a long time.

  The dimension L1 (see FIG. 1) for pulling and fastening the torsion coil spring 53 varies depending on the number of twists of the torsion coil spring 53 (or the stroke of the opening / closing body 10 from the fully open state to the fully closed state). . For this reason, in the case of an opening / closing device in which the number of twists is many (for example, when the stroke differs depending on the site, etc.), the fastening position (dimension L1) of the spring assembly 50 cannot be determined uniformly. Even in such a case, since the frequency of opening and closing is very high, in the case of an opening / closing device or the like that places more importance on the life of the torsion coil spring 53 and the improvement of the spring performance, It is effective to apply the embodiment. Of course, when the range of the number of twists is determined because the application range of the switchgear has been determined, the fastening position (dimension L1) of the spring assembly 50 can be set uniformly, which reduces the manufacturing cost. The effect of reduction and quality improvement is increased.

  Further, according to the above embodiment, the number of twists of the torsion coil spring 53 is based on the premise that the opening / closing body 10 is opened from the fully closed state to the fully open state. When not stopping at a predetermined intermediate position (for example, when the opening / closing body is set to stop at a position slightly opened rather than fully closed for ventilation during the daytime, and when the predetermined time at night comes) When the opening / closing body is stopped at the original fully closed position for crime prevention or the like, the intermediate position is regarded as the fully closed state, and the number of torsion of the torsion coil spring 53 can be set. It is.

  Further, in the above embodiment, until the spring assembly 50 is twisted (that is, the torsion coil spring 53 is twisted) and fixed to the fixed shaft 40, and the upper end of the opening / closing body 10 is fixed to the winding body 30. The above steps (further, the steps until these are stored in a storage case (not shown)) are performed at the factory, but up to which process is performed at the factory is arbitrary.

  Further, according to the above embodiment, as the guide shaft 20 is wound and rotated by driving the drive source, the fixed shaft 40 is rotated in the winding direction by the restoring force of the torsion coil spring 53. As another example, the drive source may be omitted, and the guide shaft 20 and the winding body 30 may be rotated in the winding direction only by the restoring force of the torsion coil spring 53.

Moreover, according to the said Example, although the two-shaft type opening / closing apparatus 1 which winds the opening-and-closing body 10 guide | induced to the crossing direction with respect to an open direction by the guide shaft 20 to the winding body 30 was comprised, As shown in FIG. 13, a uniaxial switchgear 2 can be configured.
The opening / closing device 2 shown in FIG. 13 includes a cylindrical winding body 30 ′ that is rotatably supported, and an opening / closing body 10 that is fixed to the outer periphery of the winding body 30 ′. The structure of 'is configured in substantially the same manner as the winding body 30 described above.
According to this opening / closing device 2, when the winding body 30 'is rotated in one direction, the opening / closing body 10 is drawn out directly from the outer periphery of the winding body 30' to perform a closing operation. If it rotates in the reverse direction, the base end side of the opening-closing body 10 will be directly wound on the outer periphery of winding body 30 '. With this opening / closing operation, the rotation of the spring assembly 50 in the winding body 30 ′ in the twisting direction and the rotation in the restoring direction are repeated in substantially the same manner as the opening / closing device 1. Good durability can be obtained by the gap.
The opening / closing device 2 may be configured to manually open / close the opening / closing body 10 or may be configured to open / close the opening / closing body 10 by rotating the winding body 30 by the driving force of the drive source. When the opening / closing body 10 is manually opened and closed, the winding body 30 may be wound and rotated by the urging force of the torsion coil spring 53, or the winding body 30 may be wound in order to stop the opening / closing body 10 at an opening / closing position. The body 30 may be configured to use the biasing force of the torsion coil spring 53 (a so-called balance shutter configuration). When the winding body 30 is rotated by the driving force of the driving source, the driving force of the driving source may be assisted by the urging force of the torsion coil spring 53, and the winding body 30 may be The winding body 30 may be rotated by being driven by a driving source and rotated by the urging force of the torsion coil spring 53.

  In the above embodiment, the winding bodies 30 and 30 ′ are rotated in the winding direction by the restoring force of the twisted torsion coil spring 53. However, as another example, It is also possible to adopt a configuration in which the winding bodies 30 and 30 ′ are rotated in the feeding direction by a restoring force.

DESCRIPTION OF SYMBOLS 1, 2: Opening / closing device 10: Opening / closing body 30: Winding body 50: Spring assembly 51: End side rotation support member 51d: Anti-rotation member 52: Spring fixing member 53: Torsion coil spring 70: Center side rotation support member

Claims (10)

A cylindrical winding body that is rotatably supported, a torsion coil spring provided substantially concentrically within the winding body, and an opening / closing body that is wound on or fed out from the winding body In accordance with the opening / closing operation of the opening / closing body, the winding body is rotated by a circumferential urging force of the torsion coil spring.
An opening / closing apparatus characterized in that one end side in the axial direction of the torsion coil spring is fixed to a non-rotatable portion and the other end side is fixed to the winding body in a state pulled in the axial direction.   2. The torsion coil spring is pulled in an axial direction so that the strands do not contact each other while the opening / closing body moves in a range from a fully open position to a fully closed position. Switchgear.   The other end side of the torsion coil spring is fixed to the winding body while being twisted a predetermined number of times in the winding direction of the torsion coil spring and pulled in the axial direction. The switchgear according to 2.   4. The switchgear according to claim 3, wherein the torsion coil spring is pulled so as to be longer than a length extending in an axial direction by being twisted a number of times torsionally from a free state.   The torsion coil spring is pulled so as to be longer by 1 to 3 times the outer diameter of the strand of the torsion coil spring than the length extending in the axial direction by being twisted in the winding direction from the free state. The switchgear according to claim 4, wherein the switchgear is provided.   A guide shaft that guides the opening / closing body along one half portion side in a direction intersecting the opening / closing body opening / closing direction, and the winding body is provided at a position separated from the guide shaft in the intersecting direction, The switchgear according to any one of claims 1 to 5, wherein the switchgear guided by a shaft is wound up.   An engagement recess opening in the tangential direction of the winding body is provided on the outer peripheral portion of the winding body, and the opening direction side end of the opening / closing body is fitted into the engagement recess and fixed. The switchgear according to any one of claims 1 to 6.   The open / close body includes a base portion fixed to an outer peripheral portion of the winding body, and an open / close body main body detachably connected to an end portion in a closing direction of the base portion. The opening / closing apparatus of any one of Claims. The non-rotatable part is a fixed shaft that is disposed on the center side of the winding body and both end sides are fixed to immobile parts,
The said torsion coil spring is provided in the circumference | surroundings of the said fixed axis | shaft, and rotates the said winding body in the winding direction with the restoring force of the circumferential direction, The one of Claim 1 thru | or 8 characterized by the above-mentioned. Switchgear.   A step of detachably fixing one end side of the torsion coil spring to the fixed shaft; and the other end side of the torsion coil spring being twisted and pulled in the winding direction toward the center in the axial direction of the fixed shaft. The method includes a step of fastening, a step of fastening the one end side of the torsion coil spring to the winding body, and a step of removing the one end side of the torsion coil spring from the fixed shaft. Item 10. A method for manufacturing a switchgear according to Item 9.

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