JP2021147811A - Multi-spring system - Google Patents

Abstract

To provide a multi-spring system in which spring bodies in contact with each other in the thickness direction are suppressed from separately and irregularly vibrating and interfering with each other, damage to the spring body is suppressed, and the durability of a constant load spring unit is improved more than before.SOLUTION: A multi-spring system of the present invention comprises a bracket attached to a first member and a plurality of constant load spring units held in the bracket. Each of the constant load spring units includes a bobbin and a strip-like constant load spring section that is wound on the bobbin and attached at the tip to the second member. The constant-load spring section has a spring body that contacts the constant-load spring section of the adjacent constant-load spring unit in the thickness direction and an attachment section that is laminated to the spring body and attaches the spring body to the constant-load spring section of the adjacent constant-load spring unit. This prevents the spring bodies from separately and irregularly vibrating and interfering with each other and buckling.SELECTED DRAWING: Figure 9

Description

The present invention relates to a multi-spring system using a plurality of spring bodies, and more particularly to a multi-spring system used in a state where a plurality of spring bodies are in contact with each other in the thickness direction.

It is known that this kind of multi-spring system is provided between the guide rail and the door panel and is used as a closer of the door panel. That is, in the closer of the door panel, the arrangement area is limited to the thickness dimension of the door panel, and in order to secure a constant spring output in the limited area, a plurality of spring bodies are stacked and used in the thickness direction. There is. Specifically, Patent Document 1 discloses a multi-spring system in which a guide rail and a door panel are connected by using two constant load spring units arranged adjacent to each other in the opening direction of the door panel. Each constant load spring unit is equipped with a spool (corresponding to "bobbin") and a spring band body wound around the spool (corresponding to "spring body"), and the spools of both units are attached to the door panel. It is held by the bracket. The spring strips drawn out from the respective spools are arranged so as to overlap each other in the thickness direction, and the payout ends of the respective spring strips are connected to the guide rail.

With this configuration, even if the arrangement area is limited, the spring output of the two constant load spring units arranged adjacent to each other on the left and right can be added up to sufficiently increase the spring output of the multi-spring system as a whole. Furthermore, the time required for the constant load spring unit to reach the end of its life can be extended. Therefore, even when the dimensions of the guide rail and the door panel in the width direction are restricted and the weight of the door panel is large, the door panel can be accurately moved and operated without impairing the durability of the constant load spring unit.

Japanese Unexamined Patent Publication No. 2014-201918

However, in the multi-spring system as described in Patent Document 1, when the spring strips are fed or unloaded from the respective constant load spring units, the spring strips vibrate independently and irregularly and interfere with each other. (Once separated and collide again). Then, when these spring strips continue to interfere with each other for a long period of time, the spring strips may unexpectedly buckle.

Due to this buckling, the spring band body cannot exert a sufficient spring output, and not only a spring output of a sufficient size cannot be obtained as a whole multi-spring system, but also the spring band body breaks relatively easily based on the buckling. It is also possible that the constant load spring unit becomes easier to handle and the durability of the constant load spring unit decreases.

The present invention has been made in view of the above-mentioned conventional problems, and it is intended to integrally operate the spring bodies that are in contact with each other in the thickness direction to prevent them from vibrating independently and irregularly and interfering with each other. Furthermore, it is an object of the present invention to provide a multi-spring system in which damage to the spring body is suppressed and the durability of the constant load spring unit is improved as compared with the conventional one.

In order to solve the above problems, the multi-spring system according to one aspect of the present invention includes a bracket attached to the first member and the bracket in series along an axis orthogonal direction having an axis and orthogonal to the axis. It is a multi-spring system including a plurality of constant load spring units held in the above, and each of the constant load spring units is wound around the bobbin held by the bracket and the bobbin so as to be able to enter and exit in the direction orthogonal to the axis. The constant load spring portion is provided with a band-shaped constant load spring portion to which a tip portion is attached to a second member that is rotated and moves relative to the first member along the axis orthogonal direction. A spring body that is urged in the feeding direction by being fed from the bobbin and comes into contact with the constant load spring portion of the adjacent constant load spring unit in the thickness direction, and the spring body that is laminated on the spring body and adjacent to the spring body. It has an attachment portion to be attached to the constant load spring portion of the load spring unit.

According to this multi-spring system, a bracket attached to the first member and a plurality of constant load spring units having an axis and being held in series by the bracket along an axis orthogonal direction orthogonal to the axis. Therefore, even when the arrangement area in the axial direction is limited, a relatively large spring output can be obtained as a whole of the multi-spring system by the plurality of constant load spring units.

Further, each of the constant load spring units is wound around the bobbin held by the bracket and the bobbin so as to be able to enter and exit in the direction orthogonal to the axis, and is wound along the axis orthogonal direction with respect to the first member. Since the second member that moves relatively is provided with a band-shaped constant load spring portion to which the tip portion is attached, the first member and the second member are connected via a bracket and a plurality of these constant load spring units. It is in a state. Therefore, when the second member is moved relative to the first member along the axially orthogonal direction so as to extend the constant load spring portion of these constant load spring units from the bobbin, the constant load spring portion of these constant load spring portions Based on the elastic recovery, the first and second members can be mutually urged in the feeding direction of the constant load spring portion. Therefore, in combination with the fact that a plurality of constant load spring units are provided, it is possible to accurately and relatively move the first member and the second member.

Further, the constant load spring portion is laminated on the spring main body and a spring main body that is urged in the feeding direction by being fed from the bobbin and is in contact with the constant load spring portion of the adjacent constant load spring unit in the thickness direction. Since it has an attachment portion for attaching the spring body to the constant load spring portion of the adjacent constant load spring unit, the spring bodies drawn out from the plurality of constant load spring units are thickened via the attachment portion. Can be attached in the direction. For this reason, by operating the spring bodies integrally, it is possible to suppress irregular vibrations and interference with each other, and further suppress damage such as buckling and breakage of the spring bodies. As a result, the durability of the constant load spring unit can be improved. Moreover, since the spring bodies are attached to each other by the attachment portion, the spring bodies can be separated from each other, and the feeding and feeding of the constant load spring portion is not hindered.

In the multi-spring system, various materials such as magnetic paint and an adhesive can be used as the adhesive portion as long as the spring bodies that come into contact with each other in the thickness direction are adhered to each other. It is preferably configured.

With this configuration, the spring bodies can be appropriately peeled off and attached to each other by the interfacial tension acting on the interface between the attachment portion and the spring body. For this reason, it is possible to allow the constant load spring part to be fed into and out of the bobbin, and to attach the spring body to the constant load spring part of the adjacent constant load spring unit to operate integrally. can. Moreover, since the adhered portion is composed of a lubricant, the influence on the spring body is suppressed as much as possible. Therefore, it is possible to effectively suppress the spring bodies from vibrating and interfering with each other, and it is possible to further improve the durability of the constant load spring unit.

In the multi-spring system, a liquid lubricant or a solid lubricant may be used as the lubricant, but the lubricant is particularly preferably grease.

With this configuration, the consistency of the grease reduces the fluidity of the adhered portion as compared with the case where a liquid lubricating oil is used as the lubricant. Therefore, the attached portion can be laminated on the spring body relatively stably. Therefore, it is possible to more effectively suppress the spring bodies from vibrating and interfering with each other, and the durability of the constant load spring unit is combined with the effect of the interfacial tension acting on the interface between the attachment part and the spring body. The sex can be stably improved.

In the multi-spring system, it is preferable to use a sliding door that can reciprocate in the horizontal direction as the first member and a guide rail that allows the reciprocating movement of the sliding door as the second member.

With this configuration, when the sliding door is moved relative to the guide rail, the sliding door is urged in the feeding direction of the constant load spring portion by the multi-spring system that connects the sliding door and the guide rail. Can be done. That is, by adjusting the urging of the constant load spring unit, it is possible to configure a semi-automatic sliding door in which the sliding door automatically returns to its original position when the sliding door is opened and closed.

The multi-spring system according to another aspect of the present invention includes a bracket attached to the first member and a constant load held on the bracket in series along an axis orthogonal direction having an axis and orthogonal to the axis. A multi-spring system including a spring unit, wherein the constant load spring unit is wound around the bobbin held by the bracket and the bobbin so as to be able to enter and exit in the direction orthogonal to the axis, and is wound around the first member. On the other hand, the second member that moves relatively along the axially orthogonal direction is provided with a plurality of strip-shaped constant load spring portions whose tip portions are attached and arranged so as to overlap each other in the thickness direction. Each of the portions is urged in the feeding direction by being fed from the bobbin and is in contact with the constant load spring portion arranged in the thickness direction thereof, and the spring body is laminated on the spring body and the thickness of the spring body is increased. It has an attachment portion to be attached to the constant load spring portion arranged in the direction.

According to this multi-spring system, the constant load spring unit is wound around the bobbin held by the bracket and the bobbin so as to be able to enter and exit in the direction orthogonal to the axis, and the shaft is wound with respect to the first member. Since the second member that moves relatively along the orthogonal direction is provided with a plurality of strip-shaped constant load spring portions whose tip portions are attached and arranged so as to overlap each other in the thickness direction, the arrangement region in the axial direction can be set. Even if it is limited, a relatively large spring output can be obtained as a whole of the multi-spring system by the plurality of constant load spring portions. Therefore, the first member and the second member can be accurately moved and operated.

Further, each of the constant load spring portions is urged in the feeding direction by being fed from the bobbin, and is laminated on the spring main body and a spring main body that contacts the constant load spring portion arranged in the thickness direction thereof. Since the spring body has an attachment portion for attaching the spring body to the constant load spring portion arranged in the thickness direction thereof, the spring bodies of the plurality of constant load spring portions are attached to each other in the thickness direction via the attachment portion and integrated. Can be operated as a target. Therefore, it is possible to operate the spring bodies integrally to prevent them from vibrating irregularly and interfering with each other, and further to suppress damage such as buckling and breakage of the spring bodies. As a result, the durability of the constant load spring unit can be improved.

As described above, according to the multi-spring system of the present invention, since the attachment portion is laminated on each of the plurality of spring bodies that are in contact with each other in the thickness direction, the spring bodies that are in contact with each other in the thickness direction are integrally operated. We provide a multi-spring system that can suppress irregular vibrations and interfere with each other, and also suppress damage to the spring body to improve the durability of the constant load spring unit compared to the conventional system. be able to.

It is a front view which shows the closed state of the sliding door device to which the multi-spring system which concerns on 1st Embodiment of this invention is applied. It is a front view which shows the open state of the sliding door device. It is a vertical sectional front view in the closed state of the sliding door device. FIG. 3 is a sectional view taken along line IV-IV of FIG. It is a perspective view of the constant load spring unit which concerns on the said multi-spring system. FIG. 5 is a sectional view taken along line VI-VI of FIG. It is a perspective view of the bobbin which concerns on the said constant load spring unit. It is a perspective view of the bracket which holds the constant load spring unit. FIG. 4 is a cross-sectional view taken along the line IX-IX of FIG. FIG. 4 is a cross-sectional equivalent view of IX-IX of FIG. 4 showing an open state of the sliding door device. FIG. 4 is an IX-IX cross-sectional equivalent view of FIG. 4 showing a multi-spring system according to a second embodiment of the present invention. FIG. 5 is an IX-IX cross-sectional equivalent view of FIG. 4 showing a multi-spring system according to a modified example of the present invention.

(First Embodiment)
Hereinafter, the multi-spring system 1 according to the first embodiment of the present invention will be described with reference to the drawings. Although the multi-spring system of the present embodiment is mounted on a hanging sliding door, it can also be mounted on other sliding doors such as a non-hanging sliding door. Further, although the multi-spring system of the present embodiment is designed to urge the sliding door in the closing direction, it may be urged in the opening direction. Further, it does not have to be automatically moved with respect to the sliding door in the closing direction and the opening direction by the spring output (recovery force), and may support the opening / closing operation force of the sliding door by the spring output.

Further, the object on which the multi-spring system is mounted is not limited to the sliding door, and may be mounted on a constant load spring system having a limited arrangement dimension in the width direction, for example, various lifting devices for raising and lowering windows, electric lamps, and the like.

First, the sliding door device 10 on which the multi-spring system 1 of the present embodiment is mounted will be briefly described. FIG. 1 is a front view showing a fully closed state of the sliding door device 10 on which the multi-spring system 1 of the present embodiment is mounted, and FIG. 2 is a front view showing a fully open state of the sliding door device 10. The sliding door device 10 has a configuration in which a sliding door 100 that opens and closes along an opening 4 formed in a wall surface of a structure such as a building is slidably provided.

Specifically, as shown in FIGS. 1 to 4, the sliding door device 10 opens and closes the guide rail 8 (corresponding to the “second member” of the present invention) extending along the upper edge of the opening 4 and the sliding door 100. Sliding door 100 that is suspended from a guide rail 8 so that it can reciprocate (slide freely) along a direction (corresponding to the "horizontal direction" and "axis orthogonal direction" of the present invention) and opens and closes the opening 4 (the "first" of the present invention. It is provided with a multi-spring system 1 for connecting the sliding door 100 and the guide rail 8 (corresponding to one member), and has a closer function for urging the sliding door 100 in the closing direction by the multi-spring system 1.

As shown in FIGS. 3 and 4, the guide rail 8 includes a plate-shaped top wall 83 extending in the opening / closing direction, a pair of rail side walls 81 and 82 hanging from both ends in the width direction of the top wall 83, and a pair of rails. It is provided with a pair of track portions 84, 85 extending from the lower end edges of the side walls 81, 82 in directions facing each other, and is configured as a hanger rail having a substantially C-shaped side view.

A hole 83a (see FIG. 9) in which a screw 12 can be inserted into the top wall 83 at a predetermined length position from the end in the closing direction so that the tip of the constant load spring portion 30 described later of the multi-spring system 1 can be screwed. ) Is formed.

The sliding door 100 is suspended from the guide rail 8. Specifically, the sliding door 100 is a rectangular panel-shaped sliding door main body 101 corresponding to the opening 4, and a pair of first and second guides arranged at the top of the sliding door main body 101 and suspending the sliding door main body 101 from the guide rail 8. The units 20 and 60 are provided.

The upper part of the sliding door main body 101 is guided in a state of being suspended from the guide rail 8 by inserting the first and second guide units 20 and 60 into the guide rail 8.

The first and second guide units 20 and 60 are fixed via the fixing portions 27 and 67 embedded in the upper corner of the sliding door body 101 and the connecting portions 25 and 65 above the fixing portions 27 and 67. It includes roller mounting portions 21 and 61 to be mounted, and guide rollers 23 and 63 rotatably supported by the roller mounting portions 21 and 61.

The first guide unit 20, together with the second guide unit 60, guides the movement of the sliding door main body 101 in the opening / closing direction along the guide rail 8. Further, in the present embodiment, the first guide unit 20 is connected to the multi-spring system 1 at the roller mounting portion 21.

The fixed portions 27 and 67 have a substantially rectangular shape in front view, and the dimension (thickness) in the width direction thereof is smaller than the dimension in the width direction of the sliding door main body 101. Further, the fixing portions 27 and 67 are equipped with a height adjusting mechanism (not shown) that can be operated from the opening / closing direction, and by adjusting the protruding amount of the connecting portions 25 and 65 using this height adjusting mechanism. The inclination of the sliding door 100 with respect to the opening / closing direction can be adjusted.

The roller mounting portions 21 and 61 are plate-shaped members elongated in the opening / closing direction. As shown in FIG. 4, holes 23a and 63a for rotatably supporting the plurality of guide rollers 23 and 63 are formed in the roller mounting portions 21 and 61 so as to penetrate in the width direction. Holes 25a and 65a for fixing the connecting portions 25 and 65 are formed so as to penetrate the central portion in a plan view in the vertical direction. The holes 23a and 63a are preferably formed at two or more positions in the opening / closing direction with the holes 25a and 65a interposed therebetween in order to stably suspend the sliding door main body 101.

Further, the roller mounting portion 21 is formed with a connecting projection 21a that can be connected to the connecting portion 52 (described later) of the bracket 5 of the multi-spring system 1 so as to project toward the opening direction end at the opening direction end portion thereof. A hole through which the screw 13 can be inserted is formed in the connecting protrusion 21a so as to penetrate in the vertical direction.

As shown in FIG. 4, the guide rollers 23 and 63 are arranged at both ends of the roller mounting portions 21 and 61 in the width direction, respectively. More specifically, one is arranged at each end of the shaft members 23b, 63b rotatably supported by the holes 23a, 63a in the width direction.

The multi-spring system 1 is attached across the sliding door 100 and the guide rail 8, and the constant load spring portion 30 (described later) is unwound by moving the sliding door 100 in the opening direction. The sliding door 100 can be urged in the closing direction by a constant spring output.

Specifically, as shown in FIG. 3, a plurality of multi-spring systems 1 are held in series with the bracket 5 connected to the connecting projection 21a of the roller mounting portion 21 and the bracket 5 along the opening / closing direction. (2 in this embodiment) constant load spring units 3 are provided, and these constant load spring units 3 provide a spring output for moving the sliding door 100 in the closing direction.

As shown in FIG. 8, the bracket 5 includes a connecting portion 52 that can be connected to the first guide unit 20, a box-shaped bracket main body 50 that is integrally attached to the opening end of the connecting portion 52 and opens upward. The bracket main body 50 includes a roller mounting portion 51 projecting from the opening direction end portion toward the opening direction, and a guide roller 53 rotatably supported at both ends in the width direction of the roller mounting portion 51.

The connecting portion 52 has a substantially rectangular parallelepiped shape, and a connecting recess 52a into which the connecting projection 21a of the roller mounting portion 21 can be fitted is formed on the end surface on the closing direction side thereof.

The connecting portion 52 is formed with a hole through which the screw 13 can be inserted from the lower surface thereof to the connecting recess 52a. In this hole, the connecting protrusion 21a is fitted with the connecting recess 52a and the connecting protrusion 21a. It is designed to be continuous with the hole of. In this state, the connecting portion 52 and the connecting protrusion 21a are fastened together by inserting the screw 13 into these holes.

As shown in FIG. 8, the bracket main body 50 is formed in a rectangular parallelepiped box body elongated in the opening / closing direction.

Specifically, the bracket body 50 includes a bottom wall 54 having a substantially rectangular shape in a plan view extending in the opening / closing direction, and a pair of first and second bracket side walls 57 erected upward from both ends of the bottom wall 54 in the opening / closing direction. , 58 and the third and fourth bracket side walls 55, 56 which are erected upward from both ends of the bottom wall 54 in the width direction and are in contact with the width end of the first and second bracket side walls 57, 58. , And each of these bracket side walls 55, 56, 57, 58 presents a box shape with an internal space that opens upward.

The bracket body 50 also has a partition wall 59 that divides the internal space into two in the opening / closing direction. The partition wall 59 defines two accommodation spaces for accommodating (arranging) the constant load spring unit 3 along the opening / closing direction.

The height of the partition wall 59 is preferably lower than the height of the first bracket side wall 57 in order to avoid interference between the partition wall 59 and the constant load spring portion 30, and holes 55a and 56a described later are formed. It is more preferable that the height is equal to or slightly lower than the existing height.

In the bottom wall 54, a relief hole portion 54a corresponds to each accommodation space in order to avoid contact between the lower end portion of the bobbin 35 and the bottom wall 54 and sufficiently rotatably accommodate the constant load spring unit 3. It is formed so as to penetrate in the thickness direction. The lower end of the bobbin 35 is arranged in the relief hole 54a.

The third bracket side wall 55 is formed with a hole 55a penetrating in the width direction at a position corresponding to each accommodation space. The hole portion 55a is formed so that the inner diameter thereof is substantially the same as the outer diameter of the fixed end portion 37c in order to fit and fix the fixed end portion 37c of the shaft member 37 described later.

A hole 56a is formed in the fourth bracket side wall 56 at a position facing the hole 55a of the third bracket side wall 55. The hole portion 56a is formed so that the inner diameter thereof is slightly larger than the outer diameter of the shaft body 37b so that the shaft member 37 described later can be inserted.

A set of holes 55a and 56a are formed at a plurality of locations according to the number of constant load spring units 3. A set of holes 55a and 56a are formed side by side in the opening / closing direction of the bracket body 50. Further, in the present embodiment, the plurality of sets of the hole portions 55a and 56a are formed so as to have substantially the same height in the vertical direction.

As shown in FIG. 4, the guide rollers 53 are arranged at both ends of the roller mounting portion 51 in the width direction. More specifically, the guide rollers 53 are arranged at both ends in the width direction of the shaft member 53b rotatably inserted into the hole portion 53a formed through the roller mounting portion 51 in the width direction.

These guide rollers 53 travel in the opening / closing direction along the track portions 84 and 85 of the guide rail 8 to guide the movement of the sliding door 100 in the opening / closing direction in cooperation with the guide rollers 23 and 63.

As shown in FIG. 9, the constant load spring unit 3 is wound so that the bobbin 35 held by the bracket 5 and the tip end portion (the end portion on the closing direction side in the present embodiment) can move in and out of the bobbin 35 in the opening / closing direction. It is provided with a strip-shaped constant load spring portion 30 to be formed.

The bobbin 35 is a member for winding and holding the constant load spring portion 30, and as shown in FIG. 7, a cylindrical core material 38 and a pair of flanges 39 provided at both ends of the core material 38 in the axial direction. And.

A hole 38a through which the shaft member 37 can be inserted is formed in the core member 38 so as to penetrate in the axial direction. The shaft member 37 is inserted through the holes 38a, 55a, 56a in a state where the holes 38a and the holes 55a, 56a of the third and fourth bracket side walls 55, 56 are overlapped with each other. The constant load spring unit 3 is held by the bracket body 50 in series along the opening / closing direction.

The flange 39 has a hollow ring shape (doughnut shape), and its inner circumference is configured to be continuous with the inner circumference of the core material 38. Further, the outer diameter of the flange 39 is set larger than the outer diameter of the core material 38 in order to prevent the constant load spring portion 30 wound around the bobbin 35 (core material 38) from being displaced in the width direction. ing.

As shown in FIG. 9, the shaft member 37 is a member that serves as the axial center of the bobbin 35 and holds the bobbin 35 on the bracket 5. One of a substantially disk-shaped head 37a and one end of the head 37a. A shaft body 37b that is integrally fixed to the surface and can be inserted into the hole 38a, and a fixing that is integrally formed with the shaft body 37b at the other end opposite to one end of the shaft body 37b and can be fitted into the hole 55a. It is composed of an end portion 37c.

The diameter of the shaft body 37b is set to be slightly smaller than the inner diameter of the holes 38a and 56a in order to pass through the holes 38a and 56a. As a result, the shaft body 37b rotatably supports the bobbin 35.

Since the fixed end portion 37c is fitted and fixed to the hole portion 55a, it is preferable that the diameter of the fixed end portion 37c is substantially the same as the diameter of the hole portion 55a. Further, since the fixed end portion 37c is caulked and fixed to the third bracket side wall 55, its axial length is larger than the width direction thickness of the third bracket side wall 55 (that is, it is fixed). The end portion 37c is set so as to project outward in the thickness direction from the third bracket side wall 55).

As shown in FIG. 9, the constant load spring portion 30 has a strip-shaped spring main body 31 and an attachment portion 32 laminated on both sides of the spring main body 31 in the thickness direction. As shown in FIG. 6, the constant load spring portion 30 has a non-fixed state (free state) in which one end portion 34 is held by the core material 38 by an elastic recovery force with respect to the core material 38 of the bobbin 35. The spring is wound with a constant curvature, and the spring output in the feeding direction is accumulated by being fed from the bobbin 35, and is urged in the feeding direction in the state of being fed from the bobbin 35.

As shown in FIGS. 5 and 9, a hole 33 through which the screw 12 can be inserted is formed at the tip of the constant load spring portion 30 (the end opposite to the end 34). The constant load spring portion 30 is attached to the top wall 83 by inserting the screw 12 into the holes 33 and 83a in a state where the hole 33 and the hole 83a of the top wall 83 overlap each other. ..

Further, the constant load spring portion 30 is configured so that the spring output in a state of being extended from the bobbin 35 by a predetermined distance or more is substantially constant. Therefore, the constant load spring portion 30 is attached to the guide rail 8 in a state where the sliding door 100 is extended by a predetermined distance or more in a fully closed state in which the opening 4 is completely closed in order to always obtain a substantially constant spring output. Is preferable.

Further, the length of the constant load spring portion 30 is set so that the spring output can be applied even when the sliding door 100 is fully opened. The spring output of the constant load spring portion 30 is appropriately set, but it is preferably set in consideration of the weight of the sliding door 100 and the like so that the sliding door 100 closes at a low speed. The spring output of the constant load spring portion 30 is set by its thickness, length in the width direction, curvature, and the like.

The spring body 31 is made of a spring steel material or a SUS material.

The attachment portion 32 is used to attach a plurality of spring main bodies 31 to each other in the thickness direction of the spring main body 31 to prevent the spring main body 31 from vibrating irregularly. The adhesive portion 32 is preferably composed of a lubricant in order to suppress the influence of rust or the like on the material of the spring body 31 as much as possible, and in order to stably improve the durability of the constant load spring unit 3. It is more preferably composed of grease.

In the present embodiment, the attachment portion 32 is laminated over substantially the entire surface of the spring main body 31, but it is not always necessary to laminate over the entire surface, and the constant load spring portion of the adjacent constant load spring unit 3 is laminated. It suffices if it is laminated on the portion in contact with 30.

Hereinafter, a method of assembling the multi-spring system 1 will be described. The method of assembling the multi-spring system 1 described below is only an example, and the following procedure may be changed as appropriate.

First, the constant load spring unit 3 is assembled. Specifically, as shown in FIG. 6, the spring body 31 is wound around the bobbin 35 so that the end 34 is in a free state. Then, the spring main body 31 wound around the bobbin 35 is unwound, and grease is applied to both sides of the spring main body 31 in the thickness direction to stack the adhesive portions 32, and the spring main body 31 is fed into the bobbin 35 in this state. By doing so, the attachment portions 32 can be evenly laminated on both sides of the spring body 31 in the thickness direction.

Next, the constant load spring unit 3 is held by the bracket 5. Specifically, as shown in FIG. 9, the constant load spring unit 3 is housed in the accommodation space of the bracket body 50, respectively, and the holes 38a of the bobbin 35 (see FIG. 3) and the third and fourth bracket bodies 50 The shaft member 37 is inserted into the holes 38a, 55a, 56a in a state where the holes 55a, 56a of the bracket side walls 55, 56 are overlapped in the width direction. At this time, the portion of the fixed end portion 37c of the shaft member 37 that protrudes outward in the thickness direction of the third bracket side wall 55 is caulked to fix the shaft member 37 to the bracket body 50. By doing so, the constant load spring unit 3 is rotatably held by the bracket 5.

Hereinafter, a method of assembling the sliding door device 10 equipped with the multi-spring system 1 will be described. The method of assembling the multi-spring system 1 described below is only an example, and the following procedure may be changed as appropriate.

First, the multi-spring system 1 is attached to the first guide unit 20. Specifically, as shown in FIG. 9, the connecting projection 21a formed in the roller mounting portion 21 of the first guide unit 20 is fitted into the connecting recess 52a formed in the connecting portion 52 of the bracket 5 of the multi-spring system 1. Then, the connecting recess 52a and the connecting protrusion 21a are fastened together with the screw 13.

Next, the first and second guide units 20 and 60 are attached to the sliding door main body 101. Specifically, as shown in FIG. 3, the fixing portions 27 and 67 of the first and second guide units 20 and 60 are embedded in the upper corner of the sliding door main body 101 and fixed with screws or the like. At this time, the connecting portions 25 and 65 of the first and second guide units 20 and 60 are embedded so as to protrude from the upper end portion of the sliding door main body 101.

Next, the sliding door 100 is attached to the guide rail 8. Specifically, as shown in FIGS. 3 and 4, the multi-spring system 1 and the first and second guide units 20 and 60 are inserted from one end of the guide rail 8 in the opening / closing direction. At this time, the guide rollers 53 of the multi-spring system 1 and the guide rollers 23 and 63 of the first and second guide units 20 and 60 are inserted into the track portions 84 and 85 of the guide rail 8 while being mounted.

Next, the guide rail 8 is attached to the upper end of the opening 4, and the multi-spring system 1 is attached to the guide rail 8. Specifically, with the multi-spring system 1 and the first and second guide units 20 and 60 inserted through the guide rail 8, the guide rail 8 is attached to the upper edge of the opening 4 using screws or the like. .. Further, the two constant load spring portions 30 of the multi-spring system 1 are respectively fed out, and the hole portion 33 formed at the tip portion thereof and the hole portion 83a formed in the top wall 83 of the guide rail 8 are overlapped with each other. In this state, the screw 12 is inserted through the holes 33 and 83a to attach the constant load spring portion 30 to the top wall 83.

At this time, it is preferable to attach the constant load spring portion 30 to the guide rail 8 in a state where the constant load spring portion 30 is extended from the bobbin 35 by a predetermined distance or more. This is because the constant load spring part generally does not have a constant spring output immediately after it is paid out from the bobbin (that is, the spring output fluctuates according to the distance that the constant load spring part is paid out from the bobbin), and the spring output fluctuates from the bobbin. This is because the spring output becomes substantially constant in a state where the spring output is extended by a predetermined distance or more (that is, the spring output becomes substantially constant regardless of the distance at which the constant load spring portion is extended from the bobbin).

Further, the constant load spring portion 30 is preferably attached to the top wall 83 so that the portion drawn out from the bobbin 35 is substantially parallel to the opening / closing direction. This is because the spring output in the opening / closing direction of the constant load spring portion 30 (when the constant load spring portion 30 is extended from the bobbin 35, the urging force acting in the direction in which the constant load spring portion 30 is extended into the bobbin 35) is substantially maximized. This is because the sliding door 100 can be efficiently urged in the opening / closing direction.

By the above procedure, the sliding door device 10 equipped with the multi-spring system 1 can be assembled.

Next, the relationship between the plurality of constant load spring units 3 in the assembled state of the sliding door device 10 equipped with the multi-spring system 1 will be described.

Here, among the plurality of constant load spring units 3, the constant load spring unit 3 held on the closing direction side of the bracket 5 is the constant load spring unit 3A, the constant load spring portion 30 of the constant load spring unit 3A, the spring body 31, and the constant load spring unit 3. The attachment portion 32 is referred to as a constant load spring portion 30A, a spring body 31A, and an attachment portion 32A, respectively, and the constant load spring unit 3 held in the opening direction is the constant load spring unit 3B and the constant load spring unit 3B. The portion 30, the spring body 31, and the attachment portion 32 are referred to as a constant load spring portion 30B, a spring body 31B, and an attachment portion 32B, respectively, to distinguish them from each other.

As shown in FIG. 9, the constant load spring portions 30A and 30B that are fed out from the adjacent constant load spring units 3A and 3B in the closing direction are arranged so that the fed out portions are in contact with each other in the thickness direction. ing. More specifically, the upper portion of the constant load spring portion 30A delivered from the constant load spring unit 3A in the thickness direction of the spring body 31A is a constant load delivered from the constant load spring unit 3B via the attachment portions 32A and 32B. The spring portion 30B is in contact with the lower portion of the spring body 31B. At this time, the attachment portion 32A of the constant load spring portion 30A and the attachment portion 32B of the constant load spring portion 30B are attracted to each other by the interfacial tension, and the vibration of each is suppressed.

Further, the spring body 31B of the constant load spring portion 30B unwound from the constant load spring unit 3B is in contact with the top wall 83 via the attachment portion 32B. At this time, the constant load spring portion 30B is attracted to the top wall 83 by the interfacial tension of the attachment portion 32B, and the constant load spring portion 30B is suppressed from vibrating with respect to the top wall 83.

The operation of the sliding door device 10 equipped with the multi-spring system 1 will be described below.

In the initial state, the sliding door device 10 is in a fully closed state in which the sliding door 100 is located on the closing direction side and the opening 4 is completely closed as shown in FIG. In the fully closed state, the sliding door 100 is in contact with the wall on the closing direction side and is stationary. In this state, the constant load spring portion 30 is attached to the guide rail 8 in a state of being extended from the bobbin by a predetermined distance or more.

When the sliding door 100 is moved in the opening direction against the spring output by the multi-spring system 1 from the fully closed state, the constant load spring portion 30 is brought out from the bobbin 35 as shown in FIG. At this time, the constant load spring portion 30 acts to urge the sliding door 100 in the feeding direction (that is, the closing direction) with a substantially constant spring output regardless of the length fed from the bobbin 35.

In the present embodiment, in the fully open state, the sliding door 100 is automatically moved to the fully closed state by the spring output of the constant load spring portion 30.

(Action effect)
According to the multi-spring system 1 according to the first embodiment of the present invention, the bracket 5 attached to the sliding door 100 and the constant load spring unit 3 held in series by the bracket 5 along the opening / closing direction are provided. Even when the arrangement area in the width direction orthogonal to the opening / closing direction is limited, the constant load spring unit 3 can obtain a relatively large spring output as the whole multi-spring system 1.

Further, each of the constant load spring units 3 is wound around the bobbin 35 held by the bracket 5 and the bobbin 35 so as to be able to enter and exit in the opening / closing direction, and moves relative to the sliding door 100 along the opening / closing direction. Since the guide rail 8 is provided with a strip-shaped constant load spring portion 30 to which the tip end is attached, the sliding door 100 and the guide rail 8 are connected via the bracket 5 and a plurality of these constant load spring units 3. ing. Therefore, when the guide rail 8 is moved relative to the sliding door 100 along the opening / closing direction so as to extend the constant load spring portion 30 of the constant load spring unit 3 from the bobbin 35, the constant load spring portion 30 The sliding door 100 and the guide rail 8 can be mutually urged in the feeding direction of the constant load spring portion 30 based on the elastic recovery of the above. Therefore, in combination with the fact that a plurality of constant load spring units 3 are provided, the sliding door 100 and the guide rail 8 can be accurately and relatively moved.

Further, the constant load spring portion 30 has a strip-shaped spring main body 31 and an attachment portion 32 laminated on each of the spring main bodies 31, and the attachment portion 32 is a spring main body 31 of adjacent constant load spring units 3. Since the spring bodies 31 are attached to each other in the thickness direction, it is possible to prevent the spring bodies 31 from vibrating irregularly and interfering with each other by operating the spring bodies 31 integrally, and further, buckling of the spring bodies 31 and the like. Damage such as breakage can be suppressed, and as a result, the durability of the constant load spring unit 3 can be improved. Moreover, since the spring bodies 31 are attached to each other by the attachment portion 32, the spring bodies 31 can be separated from each other and do not hinder the feeding and feeding of the constant load spring portion 30.

Further, since the adhesive portion 32 is made of grease, the spring main bodies 31 can be adhered to each other by the interfacial tension acting on the interface between the adhesive portion 32 and the spring main body 31. Therefore, the spring bodies 31 can be attached to each other and operated integrally while allowing the constant load spring portion 30 to be fed into the bobbin 35 and fed out from the bobbin 35. Therefore, it is possible to effectively suppress the spring bodies 31 from vibrating and interfering with each other, and it is possible to further improve the durability of the constant load spring unit 3.

Further, the fluidity of the adhesive portion 32 becomes relatively small due to the consistency of the grease. Therefore, the attachment portion 32 can be laminated on the spring body 31 relatively stably. Therefore, it is possible to more effectively suppress the spring bodies 31 from vibrating and interfering with each other, and in combination with the effect of the interfacial tension acting on the interface between the attachment portion 32 and the spring body 31, the constant load spring. The durability of the units 3A and 3B can be further improved.

Further, since the multi-spring system 1 is arranged above the sliding door 100, a hanging type can be used as the sliding door 100. Therefore, the floor surface on which the sliding door 100 is arranged can be flattened, and the barrier-free property of the building or the like can be improved.

(Second Embodiment)
The multi-spring system 201 according to the second embodiment of the present invention will be described focusing on the difference from the first embodiment.

As shown in FIG. 11, the multi-spring system 201 of the second embodiment uses a bracket 205 for holding a single bobbin 35 instead of the bracket 5 for holding a plurality of bobbins 35, and a single constant load spring. The first embodiment relates to the first embodiment in that a constant load spring unit 203 including a plurality of constant load spring portions 30 and a single bobbin 35 is used instead of the constant load spring unit 3 including the portion 30 and a single bobbin 35. It is different from the multi-spring system 1.

The bracket body 250 of the bracket 205 has a box shape that opens upward, and the opening defines a storage space that can accommodate the constant load spring unit 203. Further, the bottom wall 254, the fifth and sixth side walls of the bracket body 250, 255, 256 have dimensions in the opening / closing direction as compared with the bottom wall 54, the third and fourth bracket side walls 55, 56 of the bracket body 50. The fifth and sixth side walls 255 and 256 (not shown) are formed with one hole portion 255a and one 256a (not shown) similar to the hole portions 55a and 56a, respectively.

Further, a plurality of constant load spring units 203 are arranged so as to be wound around the bobbin 35 held by the bracket 205 and to be in and out of the bobbin 35 in the opening / closing direction and to be in contact with each other in the thickness direction (the present embodiment). The two) strip-shaped constant load spring portions 30 are provided.

Unlike the constant load spring unit 3 according to the first embodiment, the constant load spring unit 203 according to the second embodiment is wound around the bobbin 35 in a state where a plurality of constant load spring portions 30 overlap each other in the thickness direction. It has become so.

When assembling the multi-spring system 201, first, the constant load spring unit 203 is assembled. Specifically, the adhesive portions 32 made of grease are laminated on both sides of each of the plurality of spring main bodies 31, to form the plurality of constant load spring portions 30. Then, the plurality of constant load spring portions 30 are wound around the bobbin 35 so that the end portions 34 are in a free state in a state where they are overlapped in the thickness direction.

Next, the constant load spring unit 203 assembled in this way is held by the bracket 205. Specifically, the constant load spring unit 203 is accommodated in the accommodation space of the bracket 205. Then, the shaft member 37 is inserted into the holes 255a and 256a of the fifth and sixth side walls 255 and 256 and the holes 38a of the bobbin 35 in a state of being overlapped with each other.

The multi-spring system 201 can be assembled by the above procedure.

(Action effect)
According to the multi-spring system according to the second embodiment of the present invention, even when the arrangement area in the thickness direction is limited, the plurality of constant load spring portions 30 provide a relatively large spring output as the entire multi-spring system. Can be obtained. Therefore, the sliding door 100 and the guide rail 8 can be accurately moved and operated.

Further, since the attachment portion 32 adheres the spring bodies 31 of the constant load spring portions 30 to each other in the thickness direction, the spring bodies 31 are integrally operated to vibrate independently and irregularly and interfere with each other. Further, damage such as buckling and breakage of the spring body 31 can be suppressed, and as a result, the durability of the constant load spring unit 3 can be improved.

(Modification example)
The embodiment is merely an example of a preferred specific example of the present invention, and the present invention is not limited to the embodiment.

For example, in the first embodiment described above, the multi-spring system 1 mounted on the sliding door device 10 has been described, but the object on which the multi-spring system is mounted is not limited to the sliding door device 10, and for example, raising and lowering the lighting and the like. It may be a device.

The elevating device includes, for example, a ceiling, a multi-spring system having one end attached to the ceiling and hanging from the ceiling, and an elevating body attached to the other end of the multi-spring system. The constant load spring portion of this multi-spring system is designed to be fed downward, and the elevating body is urged upward in the fed state.

The constant load spring portion is configured so that the spring output (recovery force acting upward) and the gravity of the elevating body are balanced in a state of being extended from the bobbin by a predetermined distance or more. In this way, the elevating body can be easily moved up and down with a small external force, and the elevating body can be held at the elevating position.

Further, the multi-spring system 1 of the present invention can be applied to other objects such as folding doors, sliding doors, drawers, cupboards, roll screens, elevating windows, etc., as long as the constant load spring unit 3 can be used. Can also be installed.

In the first embodiment, the case where the multi-spring system 1 is arranged above the sliding door 100 has been described, but the position where the multi-spring system 1 is arranged is not limited to this, and is, for example, arranged below the sliding door. You may. Specifically, a door pocket that can accommodate the sliding door 100 in the fully opened state of the sliding door device 10 may be provided on the wall surface adjacent to the opening 4, and may be provided inside the door pocket and at the opening direction end portion of the door pocket. In this case, in the initial state, the sliding door 100 is located at a fully open position where the opening 4 is fully opened, and by moving the sliding door 100 in the closing direction from this state, the sliding door 100 is generated by the spring output of the constant load spring portion 30. Can also be urged in the open direction.

In the first embodiment, the constant load spring portion 30 is directly attached to the top wall 83 of the guide rail 8, but the method of attaching the constant load spring portion 30 to the guide rail 8 is not limited to this. For example, as shown in FIG. 12, instead of the guide rail 8, the top wall 83, the rail side walls 81 and 82, the track portions 84 and 85, and the spacer 86 arranged on the lower surface of the top wall 83 are provided. Both may be attached by superimposing the hole 86a of the spacer 86 and the hole 33 of the constant load spring portion 30 and inserting the screw 12 through the holes 86a and 33 using a guide rail. In this way, a space is created between the constant load spring portion 30 and the top wall 83 by the thickness of the spacer 86, so that the top wall 83 and the constant load spring portion 30 come into contact with each other and the constant load spring portion 30 Can be suppressed from breaking.

Further, when there is a space between the constant load spring portion 30 and the top wall 83, there is a possibility that the multi-spring system 1 moves up and down when the sliding door 100 is opened and closed. In order to suppress the flip-up, the bracket-side flip-up suppressing portion may be provided so as to project upward from the upper end portions of the third and fourth bracket side walls 55 and 56 in the opening direction. It is more preferable that the amount of protrusion of the bracket-side flip-up suppressing portion is set higher than the upper end of the bobbin 35 and is set so as to be in contact with the top wall 83. By doing so, when the sliding door 100 is opened and closed, the bracket-side flip-up suppressing portion comes into contact with the top wall 83. Therefore, it is possible to suppress the flip-up of the multi-spring system 1 that moves in the vertical direction.

At this time, each of the rail side walls 81 and 82 of the guide rail 8 may form a pair of contact portions that extend in the opening / closing direction and project in directions facing each other to come into contact with the bracket-side flip-up suppressing portion. .. By doing so, when the sliding door 100 is opened and closed, the bracket-side flip-up suppressing portion comes into contact with the abutting portion. Therefore, it is possible to suppress the flip-up in which the multi-spring system 1 moves in the vertical direction without increasing the amount of protrusion of the bracket-side flip-up suppressing portion so much.

Further, the second guide unit 60 may also be provided with a roller-side flip-up suppressing mechanism for suppressing flip-up. This roller-side flip-up suppression mechanism is, for example, attached to the end of the roller mounting portion 61 on the closing direction side with screws or the like, and extends in the width direction to abut the rail side walls 81 and 82 of the guide rail 8. It is composed of a fixed portion having a shape and a pair of roller-side flip-up suppressing portions that are erected upward from both ends in the width direction of the fixed portion and extend in the opening / closing direction. It is more preferable that the height of the roller-side flip-up suppression is set higher than the upper end of the bobbin 35 and is set so as to be in contact with the top wall 83. By doing so, the roller-side flip-up suppressing portion comes into contact with the top wall 83, and the flip-up of the second guide unit 60 can be suppressed. Further, when the contact portions are formed on the rail side walls 81 and 82 of the guide rail 8, the second guide unit 60 moves in the vertical direction without increasing the height of the roller side flip-up suppressing portion so much. The rise can be suppressed.

In the first embodiment, the constant load spring portion 30 is attached to the guide rail 8 via the screw 12, but at this time, a flat plate-shaped holding plate having a hole through which the screw 12 can be inserted may be used. good. That is, with the constant load spring portion 30 sandwiched between the holding plate and the top wall 83 of the guide rail 8, the screw 12 is inserted into these holes, and the constant load spring portion 30 is fixed to the guide rail 8. Is also good. In this way, the constant load spring portion 30 is fixed to the guide rail 8 while being sandwiched between the pressing plate and the top wall 83, so that the pressing force of the pressing plate is relatively large at the tip of the constant load spring portion 30. Widely granted. Therefore, the warp deformation of the tip portion of the constant load spring portion 30 can be suppressed, and the constant load spring portion 30 can be fixed to the guide rail 8 in a relatively stable state.

In the first embodiment, the plurality of constant load spring units 3 are held by the single bracket 5, but it is not necessary to hold the plurality of constant load spring units 3 together by the single bracket 5, and the plurality of brackets. May be held separately for each. In this way, although the manufacturing cost of the brackets increases, the number of constant load spring units 3 can be adjusted as needed by connecting or disconnecting the brackets, and the like during use. Versatility can be improved.

In the first embodiment, the hanging type sliding door 100 is used as the first member, but the one that can be used as the first member is not limited to the hanging type. For example, a sliding door may be used in which a door roller is provided at the lower end of the sliding door main body 101 so as to be in contact with the ground.

In the first embodiment, the bracket 5 is attached to the roller mounting portion 21 of the first guide unit 20 of the sliding door 100, and the constant load spring portion 30 is attached to the guide rail 8, but the bracket 5 and the constant load spring portion 30 are attached. The positions to be placed may be reversed. That is, the bracket 5 may be attached to the guide rail 8 and the constant load spring portion 30 may be attached to the sliding door 100.

Needless to say, various design changes are possible within the scope of the claims of the present invention.

1 Multi-spring system 3 Constant load spring unit 5 Bracket 8 Guide rail (second member)
30 Constant load spring part 31 Spring body 32 Adhesion part 35 Bobbin 100 Sliding door (first member)
201 Multi-spring system 203 Constant load spring unit 205 Bracket

Claims (5)

A multi-spring system including a bracket attached to a first member and a plurality of constant load spring units having an axis and being held in series by the bracket along an axis orthogonal direction orthogonal to the axis. ,
Each of the constant load spring units is wound around the bobbin held by the bracket so as to be able to enter and exit in the direction orthogonal to the axis, and is relative to the first member along the direction orthogonal to the axis. It is equipped with a strip-shaped constant load spring part to which the tip part is attached to the second member that moves in a target manner.
The constant load spring portion is laminated on the spring body and a spring body that is urged in the feeding direction by being fed from the bobbin and comes into contact with the constant load spring portion of the adjacent constant load spring unit in the thickness direction. A multi-spring system having an attachment portion that attaches the spring body to the constant load spring portion of the adjacent constant load spring unit. In the multi-spring system according to claim 1,
The attachment part is a multi-spring system composed of a lubricant. In the multi-spring system according to claim 2,
The lubricant is a grease, a multi-spring system. In the multi-spring system according to any one of claims 1 to 3.
The first member is a sliding door that can reciprocate in the horizontal direction.
The second member is a multi-spring system, which is a guide rail that allows the reciprocating movement of the sliding door. A multi-spring system including a bracket attached to the first member and a constant load spring unit having an axis and being held in series by the bracket along an axis orthogonal direction orthogonal to the axis.
The constant load spring unit is wound around the bobbin held by the bracket so as to be able to enter and exit in the direction orthogonal to the axis, and is relatively relative to the first member along the direction orthogonal to the axis. It is provided with a plurality of strip-shaped constant load spring portions whose tips are attached to the moving second member and which are arranged so as to overlap each other in the thickness direction.
Each of the constant load spring portions is urged in the feed-in direction by being fed from the bobbin and is in contact with the constant load spring portion arranged in the thickness direction thereof, and the spring body laminated on the spring body. A multi-spring system having an attachment portion that attaches the main body to the constant load spring portion arranged in the thickness direction thereof.

Images