JP6083866B2 - Connecting structure of constant load spring unit, and sliding door opening / closing support device provided with constant load spring unit - Google Patents

Description

  The present invention relates to a connection structure for a constant load spring unit and a sliding door opening / closing support device including the constant load spring unit.

  With respect to a sliding door opening / closing support device including a constant load spring unit, for example, Patent Document 1 discloses an automatic closing device for a sliding door according to the proposal of the present applicant. There, a constant load spring unit is provided between the door panel and the guide rail to close the door panel in the open position, and the door panel closing operation is braked against the operating force of the constant load spring unit. The automatic closing device is made up of air dampers. In the constant load spring unit, the spool is disposed on the closed end side of the door panel, and the extended end of the spring belt extended from the spool is fixed near the closed end of the guide rail.

  In the automatic closing device described above, the spool of the constant load spring unit is rotatably supported by a holder fixed to the runner on the closed end side, and the extended end of the spring belt extended from the upper surface side of the spool is It is connected to a bracket fixed to the wall by caulking and fixing with rivets. Since the bracket and the feeding end of the spring belt body are sandwiched and fixed by rivets and are in close contact with each other, they do not rotate relative to each other.

  A C-type constant load spring unit (commercially available product) according to the present invention is configured by winding a long spring belt around a spool in a spiral shape. In this type of constant load spring unit, if the weight of the door panel exceeds a certain level, the spring output is insufficient with only one constant load spring unit, so that the door panel can be smoothly closed or opened. become unable. The spring output can be increased by increasing the width or thickness dimension of the spring band. However, in the case where there is a dimensional limitation in the application part of the constant load spring unit, for example, in the case where the constant load spring unit is arranged in a guide rail having a constant width as in the automatic closing device of Patent Document 1, The width of the spring belt cannot be increased. Further, when the thickness of the spring band is increased, there is a problem in practical use because the lifetime is remarkably shortened as compared with a spring band having a small thickness. In order to eliminate such practical limitations, when the weight of the door panel exceeds a certain level, it is sufficient to use a multiple-structure spring unit in which a plurality of thin spring strips are wound around a spool. The spring output and the life time can be secured. In addition, when a spring strip having a large feeding stroke is required, a multiple structure spring unit in which spring strips fed from a plurality of sets of constant load spring units are stacked may be used. Spring output and life time can be secured.

Japanese Patent Laying-Open No. 2004-076432 (paragraph numbers 0024 to 0025, FIG. 1)

  As described above, in the support device that supports the closing operation of the door panel using the constant load spring unit as a power source, some noise is generated when the door panel is opened and closed. One is a collision sound when the spring belt collides with the upper wall of the guide rail or the connection base fixed to the upper wall at the initial opening or closing of the door panel. Originally, the constant load spring unit cannot exert a spring force unless the spring band is fed from the spool more than half a turn. In this extended state, the extended end of the spring band is the outer edge of the spool. There is a characteristic that bulges more. For this reason, if the distance between the spool and the upper wall of the guide rail is smaller than the bulge dimension, the spring band will collide with the upper wall of the guide rail and the connecting base. Increasing the distance between the spool and the upper wall of the guide rail can prevent the occurrence of the previous impact noise. In this case, however, the vertical dimension of the guide rail increases, which increases the cost and increases the size of the guide rail. It is inevitable that a dead space is formed.

  The second noise is a deformation sound when the twist of the spring belt returns at the closing end when the door panel has moved from the open position to near the closed end. This deformation noise is the same as the deformation sound (packing or pecking) when a gently bending leaf spring is forcibly deformed in the direction opposite to the bending direction. When the constant load spring unit is composed of a multiple structure spring unit, noise different from the previous noise is generated. In the multi-structure spring unit, the two spring strips are drawn out from the spool in a state where they overlap in the thickness direction. However, when the door panel is largely opened, the two spring strips are pulled out from the spool long. It hangs down under its own weight. Therefore, the suspended spring belts rub against each other and generate a sliding contact sound.

  Each of the above noises has been clearly recognized for some time by engineers working on the development of devices using constant load spring units. However, the cause was not pursued, but rather, it was left as an inevitable when using a constant load spring unit. The inventor has conducted research while pursuing the causes of the noises described above, and as a result, has clarified that there is a problem in the connection structure at the extended end of the spring belt, and has come to propose the present invention. is there.

An object of the present invention is to provide a connection structure of a constant load spring unit that can improve the connection structure at the extended end of a spring band of a constant load spring unit and eliminate the occurrence of collision noise and deformation noise.
An object of the present invention is to provide a connection structure of constant load spring units that can eliminate the occurrence of sliding contact noise when the constant load spring unit is composed of a multiple structure spring unit.
An object of the present invention is to provide a sliding door opening / closing support device including a constant load spring unit that can eliminate the occurrence of collision noise, deformation sound, and sliding contact noise of a spring belt when the door panel is opened and closed.

In the coupling structure of the constant force spring unit according to the present invention, a long fixing member 1 in the lateral direction, and the movable member 2 can be moved in the lateral direction along the fixed member 1 are connected via a constant-force spring unit 10 The The constant load spring unit 10 includes a spool 22 and a metal spring band body 23 wound around the spool 22. The feeding end of the spring belt body 23 is connected to one of the fixed member 1 and the moving member 2 via a connecting plate 31 connected to the connecting object, and the spool 22 remains on the other side. It is rotatably supported by a member. When the vertical surface facing the constant load spring unit 10 to be connected is defined as the inner surface, and the tip located on the constant load spring unit 10 side in the left and right direction of the connection plate 31 is defined as the protruding end side, the connection plate 31 Is connected to the connection target in a state having an inclined surface that is inclined in the diagonal direction in the left, right, up, and down directions such that the tip side approaches the inner surface of the connection target. Then, by being guided by the inclined surface of the connecting plate 31, the feeding portion from the spool 22 of the spring band 23 continuous to the feeding end is configured to come into close contact with the inner surface of the connection target. It is characterized by that. The connection form of the connection plate 31 includes a case where the connection plate 31 is connected to the guide rail (fixing member) 1 via the connection base 30 as shown in FIG. It may be connected to a guide rail (fixing member) 1.

The connecting plate 31 is connected to one of the fixed member 1 and the moving member 2 through the connecting base 30 . When the vertical surface facing the constant load spring unit 10 of the connection base 30 is defined as the inner surface, it is guided by the inclined surface of the connection plate 31 so that the spool 22 of the spring belt 23 continuous with the feeding end is removed. The extending portion is configured to be in close contact with the inner surface of the connection base 30 in a surface contact manner.

As shown in FIG. 1, the connecting base 30, the fastening seat 33 for coupling the coupling plate 31 that is shaped formation. The fastening seat 33 is formed in a state in which it is inclined in an oblique direction in the left, right, up and down directions . The connecting plate 31 formed in a flat plate shape is connected to the fastening seat 33 by the first fastening body 44, and in the connected state by the first fastening body 44, the connecting plate 31 approaches the inner surface of the connection target. It is comprised so that it may be in the state which has an inclined surface which inclines in the diagonal direction of such right-and-left and up-down.

As shown in FIG. 7, the fastening seat 33 of the connection base 30 for connecting the connection plate 31 matches the extension direction of the mounting surface 36 in a non-contact state away from the mounting surface 36 which is the inner surface to be connected. It is formed in the horizontal posture to do. The connecting plate 31, left and right horizontal proximal joint seat 48, and the tip joining seat 49 having an inclined surface inclined in the oblique direction of the left and right upper and lower as approaching tip side toward the inner surface of the connecting subject are provided. The base end joint seat 48 of the connection plate 31 is connected to the fastening seat 33 of the connection base 30 by the first fastening body 44, and the extension end of the spring band body 23 is connected to the protruding end joint seat 49 of the connection plate 31. that it has been consolidated at 45.

As shown in FIG. 8, a fastening seat 33 for connecting the connecting plate 31 to the connecting base 30 is formed in a horizontal horizontal posture. The connecting plate 31, left and right horizontal proximal joint seat 48, and the tip joining seat 49 having an inclined surface inclined in the oblique direction of the left and right upper and lower as approaching tip side toward the inner surface of the connection object is provided, the joining The seats 48 and 49 are continuous via the step wall 50 . At the tip joint seat 49 of the connecting plate 31, feeding end of the spring band body 23 that is connected with the second fastening member 45.

  The constant load spring unit 10 is configured by a multiple structure spring unit that is drawn out from the spool 22 in a state where a plurality of spring belts 23 overlap in the thickness direction. In addition, as shown in FIG. 1, the multiple-constant load spring unit 10 includes a plurality of spring belt bodies 23 wound around one spool 22 and a plurality of spring bands 23 as shown in FIG. In some cases, the spring band 23 is wound around the plurality of spools 22.

  The connecting plate 31 is connected to the connecting base 30 with one first fastening body 44 so as to be relatively rotatable in a state where a slight clearance C1 exists in the thickness direction of the connecting plate 31.

  The feeding end of the spring band body 23 is connected to the connecting plate 31 by one second fastening body 45 so as to be relatively rotatable with a slight clearance C2 in the thickness direction of the spring band body 23. .

  The sliding door opening / closing support device including the constant load spring unit according to the present invention is provided between the guide rail 1 and the door panel 2, the constant load spring unit 10 for moving the door panel 2, and the constant load And a damper 11 that brakes the moving operation of the door panel 2 against the moving operation force of the spring unit 10. The constant load spring unit 10 can be connected to the guide rail 1 and the door panel 2 by any one of the above-described constant load spring unit connection structures.

  In the present invention, the extended end of the spring belt body 23 of the constant load spring unit 10 is connected to, for example, the connecting plate 31 connected to the fixing member 1, and at least the protruding end side of the connecting plate 31 is inclined in a direction approaching the connection target. Thus, the connecting plate 31 is connected to the connection target. In this way, when the extended end of the spring band body 23 is connected to the inclined protruding end side of the connecting plate 31, the initial expansion of the spring band body 23 extended from the spool 22 is promoted by the inclined connecting plate 31, and the spring band body For example, the vicinity of the feeding end 23 can be forcibly brought into close contact with the connection base 30 or the guide rail 1. For this reason, even if the spring belt 23 positioned outside the spool 22 is swollen and deformed as the spring belt 23 is fed out or rewinded to the spool 22, it is received by the connection base 30 or the guide rail 1. Just be elastically deformed and there is no room for collision. Accordingly, it is possible to improve noise reduction by eliminating the occurrence of a collision sound when the spring belt 23 collides with the connection base 30 or the guide rail 1.

  In the connection structure of the constant load spring unit 10 shown in FIG. 3, the air damper 11, the runner holder 18, the roller 19, or the like is disposed below the connection plate 31 to which the feeding end of the spring band 23 is connected. . Therefore, even if it is going to connect the connection board 31 directly with respect to the fixing member 1, for example, each member above becomes obstructive and cannot connect the connection board 31. In such a case, in order to easily perform the assembling work of the connection structure of the constant load spring unit 10, the connection plate 31 is connected to the connection base 30, and the fastening portion of the connection base 30 is outward of the constant load spring unit 10. It is located. In other words, the connection base 30 is used in combination when the support structure of the constant load spring unit 10 and the connection structure of the constant load spring unit 10 overlap each other. As shown in FIG. If the lower part is an open space, the connection base 30 can be omitted.

  If the fastening seat 33 inclined to the connection base 30 is formed, and the connection plate 31 formed in a flat plate shape is connected to the fastening seat 33 by the first fastening body 44, the structure of the connection plate 31 can be simplified. Further, since the spring band 23 may be connected to the flat connecting plate 31, there is an advantage that the connecting work of the connecting plate 31 and the spring band 23 can be easily performed.

  As shown in FIG. 7, when a horizontal fastening seat 33 is formed on the connection base 30, and a horizontal base end joint seat 48 and an inclined projecting end joint seat 49 are provided on the connection plate 31, the projecting end joint seat 49 and the connection base are provided. The initial bulge of the spring belt 23 can be promoted by the connecting plate 31 while increasing the distance between the counter 30 and the counter 30. Therefore, it is possible to reliably prevent the second fastening body 45 from coming into contact with the connection base 30 when the spring belt body 23 is fed from the spool 22 or wound around the spool 22.

  As shown in FIG. 8, when the connecting base plate 31 is provided with a horizontal base end joint seat 48 and an inclined projecting end joint seat 49, the fastening seat 33 of the connection base 30 is flush with the flat face wall 30a. It can be formed horizontally. That is, since it is not necessary to bend the fastening seats 33 on the connection base 30, the influence of the formation error of the connection base 30 can be eliminated, and the inclination angle of the protrusion joint seat 49 can be set more accurately. Further, the cost required for processing the connection base 30 can be saved and the cost can be reduced.

  If the constant load spring unit 10 is composed of a multiple structure spring unit, the spring output of the constant load spring unit 10 can be sufficiently increased, and the time until the end of the life can be extended. Therefore, even when the weight of the moving member 2 is large, the moving member 2 can be accurately moved without impairing the durability of the spring unit.

  When the connecting plate 31 is connected to the connecting base 30 by the single first fastening body 44 so as to be relatively rotatable, the radial clearance between the first fastening body 44 and the connecting plate 31 and the clearance C1 in the thickness direction are reduced. The feeding end of the spring belt 23 can be tilted by the amount to absorb the torsional deformation. Along with this, it is possible to eliminate the twisting of the spring band 23 fed out from the spool 22, so that when the door panel 2 has moved from the open position to near the closed end, the spring band 23 has its own elastic force. It is possible to prevent deformation noise (packing) from being twisted back.

  When the extending end of the spring band body 23 is connected to the connecting plate 31 so as to be relatively rotatable by a single second fastening body 45, the radial gap between the second fastening body 45 and the spring belt body 23. And the inner and outer spring band members 23 can move by the amount corresponding to the clearance C2 in the thickness direction to absorb the deviation of the front-rear center. For example, it is possible to flexibly absorb the previous deviation such that the inner spring band member 23 is moved forward and the outer spring band member 23 is moved rearward. Therefore, when the inner and outer spring band members 23 are fed out from the spool 22, an excessive force is applied to the spring band members 23 to prevent relative movement, thereby preventing the occurrence of sliding contact noise.

  In the sliding door opening / closing support apparatus according to the present invention, the constant load spring unit 10 is connected to the guide rail 1 and the door panel 2 by any one of the constant load spring unit connection structures described above. Silence can be improved by eliminating the occurrence of collision sound, deformation sound or sliding contact sound of the spring belt member 23 when the door panel 2 is opened and closed.

It is a vertical front view which shows the connection structure of the constant load spring unit which concerns on this invention. It is a front view of the sliding door provided with the closing assistance device concerning the present invention. It is a vertical front view of the closing assistance apparatus which concerns on this invention. It is the sectional view on the AA line in FIG. It is the BB sectional view taken on the line in FIG. It is a vertical front view which shows the state by which the spring strip of the constant load spring unit was pulled out. It is a vertical front view which shows another Example of the connection structure of a constant load spring unit. It is a vertical front view which shows another Example of the connection structure of a constant load spring unit. It is a vertical front view which shows another Example of the connection structure of a constant load spring unit. It is a vertical front view which shows another Example of the connection structure of a constant load spring unit. It is a vertical side view which shows another Example of a constant load spring unit. It is a vertical front view which shows another Example of the connection structure of a constant load spring unit. It is a vertical front view which shows the reference example of the connection structure of a constant load spring unit. It is a vertical front view which shows the reference example of the connection structure of a constant load spring unit.

(Example) FIG. 1 thru | or FIG. 6 has shown the Example which applied the constant load spring unit based on this invention to the closing assistance apparatus of a sliding door. In the present invention, “front / rear”, “left / right”, and “up / down” follow the cross arrows shown in FIGS. 2 and 3 and the front / rear, left / right, upper / lower indications shown in the vicinity of each arrow. In FIG. 2, reference numeral 1 is a guide rail (fixed member) fixed to the upper frame of the door frame, reference numeral 2 is a door panel (moving member), and reference numeral 3 is a swing roller arranged on the floor surface side. The retaining groove 4 provided at the lower end of the door panel 2 is received. The door panel 2 is suspended from the guide rail 1 via runners 5 attached to the left and right of the upper end thereof, and can be opened and closed along the guide rail 1. Reference numeral 6 denotes a handle for opening and closing the door panel 2. In FIG. 5, the guide rail 1 is made of an aluminum strip having a U-shaped cross section that opens downward, and a pair of front and rear rail walls 7 that guide the runner 5 and the roller 19 are provided on the opening surface side.

  A closing support device (opening / closing support device) is provided inside the guide rail 1 in order to automatically close the door panel 2 that has been opened from the closed position to any open position. In FIG. 3, the closing support device includes a constant load spring unit 10 for closing the door panel 2, and braking and decelerating the moving operation of the door panel 2 against the closing operation force of the constant load spring unit 10. And an air damper (damper) 11 for gently closing 2.

  In FIG. 3, the air damper 11 includes a cylinder 12, a piston rod 13 that moves in and out of the cylinder 12, a piston 14, a speed controller 15 that is disposed at the right end of the cylinder 12, and the like. The closed end side of the cylinder 12 is connected to the body of the runner 5, and a roller 19 for smoothly reciprocating the cylinder 12 is supported on the runner holder 18 on the open end side of the cylinder 12. . A permanent magnet 16 is fixed to a holder fixed to the protruding end of the piston rod 13, and an iron plate 17 attracted by the permanent magnet 16 is disposed at the closed end of the guide rail 1.

  When the door panel 2 in the closed position is opened, the cylinder 12 moves along with the door panel 2, but the piston rod 13 does not move because it is held by the iron plate 17 via the permanent magnet 16. As the cylinder 12 moves, the spring band 23 of the constant load spring unit 10 is pulled out, and at the same time, the intake valve is opened, and external air flows into the cylinder 12 without resistance. When the opening operation force applied to the door panel 2 disappears, the closing operation force of the constant load spring unit 10 acts on the door panel 2 via the cylinder 12, so that the door panel 2 moves to the closing side. At this time, since the discharge amount of air in the cylinder 12 is controlled by the speed controller 15, the door panel 2 can be slowly closed and moved.

  The constant load spring unit 10 includes a spool 22 rotatably supported by a bracket 21 fixed to the runner holder 18, and a stainless (metal) spring belt body 23 wound around the spool 22. In this embodiment, the constant load spring unit 10 is constituted by a multiple structure spring unit in which the inner and outer double spring belt members 23 are wound around the spool 22, and the specifications of the spring output and life time of the constant load spring unit 10 are provided. And enough. The spool 22 is integrally provided with a drum 25 having a boss 24 at the center and a circular flange 26 projecting forward and backward of the drum 25. The boss 24 is pivotally supported by a spool shaft 27 fixed to the bracket 21, whereby the entire spool 22 is rotatably supported. The extended end of the spring belt 23 is connected to a connection base (connection object) 30 fixed to the upper wall of the guide rail 1 via a flat connection plate 31.

  In the sliding door closing support device configured as described above, in order to eliminate the generation of noise by the spring band 23 of the constant load spring unit 10, the connection structure at the extended end of the spring band 23 is configured as follows. ing.

  The connection base 30 is made of a strip-shaped steel plate, and as shown in FIG. 1, an inclined wall 32 having a large bending angle is formed on the closed end side, and the connection plate 31 is fastened to the inclined wall 32 continuously. The fastening seat 33 is formed by bending. The fastening seat 33 is inclined downward from the inclined wall 32 side toward the closed end side, and this inclination angle, that is, the angle θ between the fastening seat 33 and the flat plate surface 30a is 5 degrees. A connecting hole 34 is formed in the front and rear center of the fastening seat 33. The connection base 30 is joined to the upper wall of the guide rail 1 in a state where the fastening seat 33 faces the closed end side, and the open end side thereof is fastened and fixed by two screws 35 (see FIG. 3). The mounting surface 36 of the connection base 30 in this embodiment is the inner surface of the upper wall of the guide rail 1.

  As shown in FIG. 4, the connecting plate 31 is formed by punching a steel plate into a rectangular shape, and connecting holes 40 and 41 are formed in the front and rear centers of the base end side and the protruding end side, respectively. Similarly, a connection hole 42 corresponding to the connection hole 41 is formed at the front and rear center of the feeding end of the spring band 23. The connection base 30 and the connection plate 31, and the connection plate 31 and the spring belt body 23 are connected by a first rivet (first fastening body) 44 and a second rivet (second fastening body) 45, respectively.

  As shown in FIG. 1, the first rivet 44 is integrally provided with a large-diameter shaft portion 44a and a small-diameter shaft portion 44b. The shaft end of the large-diameter shaft portion 44a and the caulking head portion 44c are connected to the fastening seat 33. It is fixed by caulking in a state where it is held up and down. In this state, the connection hole 40 of the connection plate 31 is engaged with the large-diameter shaft portion 44a through a slight gap. Further, the axial length of the large-diameter shaft portion 44 a is set slightly larger than the thickness of the connecting plate 31, and the connecting plate 31 is connected to the connecting base 30 in a state where a slight clearance C1 exists in the thickness direction of the connecting plate 31. It is connected to. In this way, the connecting plate 31 is connected to the connecting base 30 so as to be rotatable relative to the connecting base 30. In this embodiment, the maximum extension length of the spring belt member 23 is 1200 mm. In this case, the radial gap between the connecting hole 40 and the large-diameter shaft portion 44a is 0.5 mm, and the clearance C1 in the thickness direction is 0. 0.5 mm.

  Similarly, the second rivet 45 is integrally provided with a large-diameter shaft portion 45a and a small-diameter shaft portion 45b, and the shaft end of the large-diameter shaft portion 45a and the caulking head portion 45c sandwich the connecting plate 31 up and down. It is fixed by caulking in the state to do. In this state, the connection hole 42 of the spring belt 23 is engaged with the large-diameter shaft portion 45a through a slight gap. Further, the axial length of the large-diameter shaft portion 45a is set to be slightly larger than the thickness of the spring band body 23 that overlaps the upper and lower parts, and the spring band has a slight clearance C2 in the thickness direction of the spring band body 23. The body 23 is connected to the connecting plate 31. In this way, the feeding end of the spring band 23 is connected to the connecting plate 31 so as to be rotatable relative to the connecting plate 31. In this embodiment, the radial gap between the connecting hole 42 and the large diameter shaft portion 45a is 0.5 mm, and the thickness direction clearance C2 is 0.5 mm.

  As described above, after connecting the spring band 23, the connecting plate 31, and the connecting base 30, the connecting plate 31 is fixed to the guide rail 1. Inclining up in the state of approaching. In this way, when the connecting plate 31 is inclined upward toward the feeding position at the upper part of the spool 22, the initial swelling of the spring band body 23 between the connecting plate 31 and the spool 22 is promoted, and The vicinity of the feeding end can be brought into close contact with the lower surface of the connection base 30 in a surface contact manner. Since this close contact state is always maintained regardless of the extension length of the spring band 23, the spring band 23 collides with the connecting base 30 at the initial opening or closing of the door panel 2, and a collision sound (click) is generated. Can be eliminated.

  In the state in which the connection base 30, the connection plate 31, and the low-load spring unit 10 are assembled between the guide rail 1 and the door panel 2, the front and rear center lines of the connection plate 31 and the front and rear center lines of the spring belt body 23. In some cases, the center line may be displaced or the center lines may intersect. Also, the runner 5 may be displaced in the front-rear center line even when the runner 5 swings back and forth. Thus, if there is a deviation between the front and rear center lines of the connecting plate 31 and the front and rear center lines of the spring belt body 23, a torsional force acts on the spring belt body 23 fed out from the spool 22. It twists to either. Therefore, when the door panel 2 moves from the open position to near the closed end, the spring belt body 23 is twisted back by its own elastic force, and a deformation sound (packing) is generated.

  However, as described above, when the base portion of the connecting plate 31 is connected to the connecting base 30 by one first rivet 44 so as to be relatively rotatable, the connecting hole 40 and the large-diameter shaft portion 44a The extension end of the spring band body 23 is tilted by the gap between the gaps and the clearance C1 in the thickness direction to absorb torsional deformation. Along with this, it is possible to eliminate the twisting of the spring band 23 fed out from the spool 22, so that when the door panel 2 has moved from the open position to near the closed end, the spring band 23 has its own elastic force. It is possible to prevent deformation noise (packing) from being twisted back.

  In the conventional constant load spring unit, the extended end of the spring band is caulked and connected to the connecting plate with two rivets, and this connection form is followed in the spring unit having a multiple structure. Thus, in the state where the extended end of the spring band is constrained by two rivets, the front and rear center lines of the inner and outer spring band bodies 23 are displaced, or the connecting plate 31 is in a state where both center lines intersect. If they are connected, the inner and outer spring strips 23 cannot be fed out in the same posture. This is because the spring belt body 23 tends to tilt either forward or backward by the amount of deviation of the front-rear center. Further, since the feeding trajectories of the inner and outer spring strips 23 are slightly different, as shown in FIG. 6, when the two spring strips 23 are pulled out from the spool 22 and hung by their own weight, Are accumulated, and the posture of each spring band 23 is likely to be different. As a result, the spring band members 23 rub against each other due to the tilting and posture differences of the inner and outer spring band members 23 to generate a sliding contact sound.

  However, as described above, when the feeding start end of the spring belt member 23 is connected to the connection base 30 by one second rivet 45 so as to be relatively rotatable, the connection hole 42 and the large-diameter shaft portion. The inner and outer spring belt bodies 23 are allowed to move by the gap between them 45a and the clearance C2 in the thickness direction to absorb the deviation in the front-rear center. For example, the deviation of the previous center line can be flexibly absorbed, for example, the inner spring band 23 is moved forward and the outer spring band 23 is moved rearward. Further, the accumulated difference in the feeding length based on the feeding locus difference between the inner and outer spring band members 23 is absorbed by the clearance between the connecting hole 42 and the large-diameter shaft portion 45a and the clearance C2 in the thickness direction. Can do. In addition, the degree of freedom of the spring band 23 is increased by the gap between the connecting hole 40 and the large-diameter shaft portion 44a and the clearance C1 in the thickness direction. Helps to absorb the difference. Therefore, when the inner and outer spring band members 23 are fed out of the spool 22 or rewinded to the spool 22, an excessive force is applied to the spring band member 23 to prevent relative movement, and sliding contact sound ( The occurrence of sharpness can be prevented.

  In the development process of the above connecting structure, by forming observation windows on the front and rear walls of the guide rail 1 and visualizing the state of the spring belt body 23 in the rail, how and at what time the noise is generated. The mechanism of noise generation and the characteristics of the generated sound were identified. Next, as a result of repeated trial and error and consideration on how to prevent noise, the above-described connection structure has been found. In the trial process, every time a prototype with some countermeasures was made, a noise test was conducted to confirm the result. Moreover, about the said connection structure finally obtained, the assembly of the connection structure was requested | required to the some operator, and also the noise test was performed, and the objectivity of the obtained connection structure was evaluated and confirmed. As a result, no collision sound, deformation sound, or sliding contact sound is generated in any case, and the door panel 2 can be opened and closed in a silent state, and a technique for eliminating three types of noise has been established. It was confirmed.

  7 to 12 show other embodiments of the connection structure of the constant load spring unit 10, respectively. In FIG. 7, the fastening seat 33 of the connection base 30 is formed horizontally. Instead, the base plate joint seat 48 joined to the base plate 30 and the projecting end joint seat 49 joined to the feeding end of the spring belt body 23 by bending the joint plate 31 in a reverse letter shape. I made it. The base end joint seat 48 is connected to the fastening seat 33 of the connection base 30 with one first rivet 44. In addition, the extended end of the spring belt body 23 is connected to the protruding end joint seat 49 by one second fastening body 45. In the connection plate 31 in this embodiment, the inclination angle of the protruding end joint seat 49 is larger than the inclination angle θ of the connection plate 31 described with reference to FIG. 1, so that it is possible to further promote the initial bulge of the extension end of the spring band 23. Since others are the same as the previous embodiment, the same reference numerals are assigned to the same members, and descriptions thereof are omitted. The same applies to other embodiments below.

  In FIG. 8, the connection base 30 is formed in a flat plate shape, and the connection plate 31 is fastened to the horizontal fastening seat 33 by the first rivets 44. The connecting plate 31 includes a horizontal base end joint seat 48, a projecting end joint seat 49 inclined upward toward the mounting surface 36, and a vertical step wall 50 connecting the joint seats 48 and 49. The feeding end of the seat 49 spring belt body 23 was connected by the second fastening body 45. In this way, when the protruding joint seat 49 that is inclined to the side of the connecting plate 31 is provided, it is not necessary to bend the fastening seat 33 on the connecting base 30, so the influence of the formation error of the connecting base 30 is eliminated. The inclination angle of the tip joint seat 49 can be set more accurately.

  In FIG. 9, the connection base 30 is formed in the same manner as in FIG. 1, and the connection plate 31 is connected to the inclined fastening seat 33 by the first rivet 44. The connecting plate 31 is formed with a flat surface on the base end side and gently curved on the protruding end side. As can be understood from this embodiment, inclining at least the protruding end side of the connecting plate 31 includes both a case where the inclined surface is a flat surface and a case where the inclined surface is curved.

  FIG. 10 shows a case where the inclined wall 32 and the fastening seat 33 are formed on the open end side of the connection base 30. In this case, the plate surface on the closed end side of the connection base 30 may be fastened and fixed to the guide rail 1 with screws.

  FIG. 11 shows a spring belt body in which constant load spring units 10 having the same structure are arranged adjacently on the left and right sides, and spools 22 of both units 10 are rotatably supported by a bracket 21 via a spool shaft 27. The feeding end of 23 was connected to the connecting plate 31 by the second rivet 45. Thus, in the case of a multiple structure spring unit using two constant load spring units 10, the winding length of the spring band body 23 in the spool 22 becomes large, and therefore the opening / closing stroke of the door panel 2 is large. Even if there is no problem, it can respond.

  In the above embodiment, the connecting plate 31 is connected to the connecting base 30 with the first rivet 44, the fastening portion of the connecting base 30 is exposed to the open end side from the constant load spring unit 10, and the guide rail is connected with the screw 35. Although it was made to fasten to 1, it is not necessary. For example, as shown in FIG. 12, the connection base 30 is omitted, and the connection plate 31 is directly attached to the upper wall of the guide rail (connection object) 1 with the first screw (first fastening body) 44 through the distance collar 52. can do. The first screw 44 is provided with a shaft portion 53 that rotatably supports the distance collar 52 and the connecting plate 31. When the first screw 44 is screwed into the guide rail 1 and the opening frame, the shaft portion 53 A radial gap is secured between the connecting hole 40 and a clearance C1 (not shown) is secured between the upper surface of the distance collar 52 and the upper wall of the guide rail 1. Further, similarly to the connection structure described in FIG. 1, the feeding start end of the spring belt body 23 is connected to the connection base 30 by one second rivet 45 so as to be relatively rotatable.

The sliding door opening / closing support apparatus according to the present invention can be implemented in the following manner.
A constant load spring unit 10 that is provided between the guide rail 1 and the door panel 2 and operates to move the door panel 2, and the moving operation of the door panel 2 is braked against the moving operation force of the constant load spring unit 10. An opening / closing support device comprising a damper 11 for
The constant load spring unit 10 includes a spool 22 and a metal spring band body 23 wound around the spool 22.
The extension end of the spring belt 23 is connected to a connection base 30 fixed to the guide rail 1 via a connection plate 31, and the spool 22 is rotatably supported by a member on the door panel 2 side,
The base end of the connecting plate 31 is connected to the connecting base 30 by one first fastening body 44, and the protruding end of the connecting plate 31 is connected to the feeding end of the spring belt body 23 by one second fastening body 45. ,
The connection plate 31 is connected to the connection base 30 in a state where at least the protruding end side of the connection plate 31 is inclined toward the mounting surface 36 of the connection base 30.
A constant load spring characterized in that the initial bulge of the extended end of the spring band body 23 is promoted by the connecting plate 31, and the vicinity of the extended end of the spring band body 23 is brought into close contact with the connecting base 30 or the mounting surface 36. A sliding door opening / closing support device equipped with a unit.

FIGS. 13 and 14 show reference examples of the connection structure of the constant load spring unit 10, respectively. In FIG. 13, the fastening seat 33 of the connection base 30 is formed horizontally, and the horizontal connection plate 31 is connected to the fastening seat 33 by one first rivet 44. Further, the feeding end of the spring belt body 23 was connected to the connecting plate 31 by one second rivet 45. The first rivet 44 is integrally provided with a large-diameter shaft portion 44a and a small-diameter shaft portion 44b, and the shaft end of the large-diameter shaft portion 44a and the caulking head portion 44c are formed in the same manner as the connection structure described in FIG. The fastening seat 33 is fixed by caulking in a state of being sandwiched up and down. In this state, the connection hole 40 of the connection plate 31 is engaged with the large-diameter shaft portion 44a through a slight gap. Further, the axial length of the large-diameter shaft portion 44 a is set slightly larger than the thickness of the connecting plate 31, and the connecting plate 31 is connected to the connecting base 30 in a state where a slight clearance C1 exists in the thickness direction of the connecting plate 31. It is connected so that relative rotation is possible. In this reference example, the radial gap between the connecting hole 40 and the large-diameter shaft portion 44a was 0.5 mm, and the clearance C1 in the thickness direction was 0.5 mm.

Similarly, the second rivet 45 is integrally provided with a large-diameter shaft portion 45a and a small-diameter shaft portion 45b, and the shaft end of the large-diameter shaft portion 45a and the caulking head portion 45c sandwich the connecting plate 31 up and down. It is fixed by caulking in the state to do. In this state, the connection hole 42 of the spring belt 23 is engaged with the large-diameter shaft portion 45a through a slight gap. Further, the axial length of the large-diameter shaft portion 45a is set to be slightly larger than the thickness of the spring band body 23 that overlaps the upper and lower parts, and the spring band has a slight clearance C2 in the thickness direction of the spring band body 23. The body 23 is connected to the connecting plate 31 so as to be rotatable relative to the connecting plate 31. In this reference example, the radial gap between the connecting hole 42 and the large-diameter shaft portion 45a was 0.5 mm, and the thickness-direction clearance C2 was 0.5 mm.

  As described above, when the connecting plate 31 and the connecting base 30 are connected to each other by the first rivet 44, and the extending end of the spring band 23 and the connecting base 30 are connected to each other by the second rivet 45, the inner and outer springs are connected. A change in the posture of the belt body 23 and a trajectory difference can be flexibly absorbed in both connecting portions. Specifically, even when the inner and outer spring band members 23 are loosely moved and the front and rear centers are shifted, or when the postures of the inner and outer spring band members 23 are different due to differences in the feeding trajectory, the front and rear center shifts and postures are different. Can be flexibly absorbed by the gap between the connecting hole 42 and the large-diameter shaft portion 45a and the clearance C2 in the thickness direction. Further, also in the connecting portion between the connecting plate 31 and the connecting base 30, the front and rear center shifts and posture shifts of the inner and outer spring bands 23 are caused by the gap between the connection hole 40 and the large-diameter shaft portion 44a, and the thickness direction. The clearance C1 can be absorbed flexibly. Therefore, when the inner and outer spring band members 23 are fed out of the spool 22 or rewinded to the spool 22, an excessive force is applied to the spring band member 23 to prevent relative movement, and sliding contact sound ( The occurrence of sharpness can be prevented.

In FIG. 14, similarly to the connection structure described in FIG. 12, the connection base 30 is omitted, and the horizontal connection plate 31 is replaced by one first screw (first fastening body) 44 via a distance collar 52. The guide rail (connection object) 1 was directly attached to the upper wall. Further, the feeding end of the spring belt body 23 was connected to the connecting plate 31 by one second rivet 45. The first screw 44 is provided with a shaft portion 53 that rotatably supports the distance collar 52 and the connecting plate 31, and the connecting hole 40 of the connecting plate 31 is engaged with the shaft portion 53 through a slight gap. Match. Further, the connecting plate 31 is connected to the guide rail 1 so as to be rotatable relative to the upper surface of the distance collar 52 and the upper wall of the guide rail 1 with the clearance C1 secured. The relationship between the connection hole 42 of the spring band body 23 and the second rivet 45 and the slight clearance C2 in the thickness direction of the spring band body 23 are the same as the connection structure described in FIG. The value of the clearance in the radial direction and the values of the clearances C1 and C2 in the first screw 44 and the second rivet 45 are the same as those in the connection structure described in FIG. In this reference example, an elastic body such as rubber is fixed to either the vicinity of the connecting portion of the spring band 23 to the connecting plate 31 or the upper wall of the guide rail 1 facing the vicinity of the connecting portion. I can leave.

  As described above, even when the connecting plate 31 is directly attached to the guide rail 1 with the first screw 44 through the distance collar 52, the change in the posture of the inner and outer spring belt 23 and the trajectory difference are caused by the first screw 44. It can be absorbed flexibly by the connecting portion and the connecting portion by the second rivet 45. Therefore, when the inner and outer spring band members 23 are fed out of the spool 22 or rewinded to the spool 22, an excessive force is applied to the spring band member 23 to prevent relative movement, and sliding contact sound ( The occurrence of sharpness can be prevented. Moreover, since the connection base 30 can be omitted, the cost of the connection structure can be reduced accordingly.

In the reference example of FIG. 13, radial gaps and thickness direction clearances C1 and C2 are secured in each of the connecting portions by the first rivet 44 and the second rivet 45, and the degree of freedom of the inner and outer spring belt bodies 23 is secured. However, it is not necessary. For example, when the feeding stroke of the spring band body 23 is small, at least the feeding end of the spring band body 23 is the second rivet 45 with respect to the connecting plate 31 to ensure a radial gap and a thickness direction clearance C2. What is necessary is just to have connected in the state which carried out. In this case, the connecting plate 31 may be simply caulked and fixed with the first rivet 44 to the fastening seat 33 of the connecting base 30. Also in the reference example of FIG. 14, the connecting plate 31 may be simply caulked and fixed to the guide rail 1 with the first collar 44 together with the distance collar 52.

  In the above embodiment, the case where the first fastening body 44 and the second fastening body 45 are stepped rivets has been described, but this is not necessary. For example, each fastening body 44 and 45 can be configured by a bolt having a large-diameter shaft portion, a screw shaft having a smaller diameter than this, and a nut screwed into the screw shaft. Further, the connecting plate 31 and the spring belt member 23 may be loosely caulked with a normal rivet so as to be relatively rotatable. If necessary, the spring band 23 can be connected to the door panel 2 side and the spool 22 can be arranged on the guide rail 1 side.

  The connection structure of the constant load spring unit according to the present invention can be widely applied not only to devices that support opening and closing of sliding doors, but also to devices that support raising and lowering windows and raising and lowering storage shelves. Further, when the moving member such as the door panel 2 is light and a large operating force is unnecessary, the constant load spring unit 10 does not have to be a multiple structure spring unit, and one spring band 23 is a spool. An ordinary constant load spring unit wound around 22 can be applied. The damper 11 may be an oil damper other than the air damper. If necessary, an elastic sheet such as rubber that prevents the generation of a collision sound may be fixed to either the collision surface side of the initial bulge portion of the spring band 23 or the collision counterpart surface side of the initial bulge portion. it can.

1 Guide rail (fixing member)
2 door panel (movable member)
DESCRIPTION OF SYMBOLS 10 Constant load spring unit 11 Damper 22 Spool 23 Spring belt body 30 Connection base 31 Connection board 36 Attachment surface 44 of a connection base 1st fastening body 45 2nd fastening body

Claims (9)

A fixing member (1) that is long in the left-right direction and a moving member (2) that can move in the left-right direction along the fixing member (1) are connected via a constant load spring unit (10),
The constant load spring unit (10) includes a spool (22) and a metal spring band (23) wound around the spool (22).
The feeding end of the spring band (23) is connected via a connecting plate (31) connected to the connection object, with either the fixed member (1) or the moving member (2) as the connection object. The spool (22) is rotatably supported by the remaining member,
The vertical surface facing the constant load spring unit (10) to be coupled is defined as the inner surface, and the tip located on the constant load spring unit (10) side in the horizontal direction of the coupling plate (31) is defined as the protruding end side. Then, the connecting plate (31) is connected to the connection target in a state having an inclined surface that is inclined in the oblique direction in the left and right and up and down directions such that the tip side approaches the inner surface of the connection target.
By being guided by the inclined surface of the connecting plate (31), the extended portion from the spool (22) of the spring belt (23) continuous to the extended end is brought into close contact with the inner surface of the connection object in a surface contact manner. A connection structure of a constant load spring unit, characterized in that it is configured . The connecting plate (31) is connected to either the fixed member (1) or the moving member (2) via the connecting base (30) ,
When the vertical surface facing the constant load spring unit (10) of the connection base (30) is defined as the inner surface, the spring band is guided by the inclined surface of the connection plate (31) and is continuous with the feeding end. The connection structure of the constant load spring unit according to claim 1, wherein a feeding portion of the spool (22) from the spool (22) is configured to come into close contact with the inner surface of the connection base (30) . The consolidated (30), fastening seat for coupling the coupling plate (31) (33) are made form,
The fastening seat (33) is formed so as to be inclined in an oblique direction in the left, right, up and down directions,
The connecting plate (31) formed in a flat plate shape is connected to the fastening seat (33) by the first fastening body (44) . In the connected state by the first fastening body (44), the connecting plate (31) The connection structure of the constant load spring unit according to claim 2, wherein the connection structure is configured to have an inclined surface that inclines in the left, right, up, and down directions so that the tip side approaches the inner surface of the connection target . When the fastening seat (33) of the connection base (30) for connecting the connection plate (31) is in a non-contact state away from the mounting surface (36) which is the inner surface of the connection target, the mounting surface (36) is extended. It is formed in a horizontal posture that matches the direction ,
A left and right horizontal base end joint seat (48) on the connecting plate (31), and a projecting end joint seat (49) having an inclined surface inclined obliquely in the left and right upper and lower directions so that the projecting end side approaches the inner surface of the connection target Is provided,
The base end joint seat (48) of the connection plate (31) is connected to the fastening seat (33) of the connection base (30) by the first fastening body (44),
Connection structure of the constant force spring unit according to tip bonding seat (49), in claim 2 feeding end that is connected with the second fastening member (45) of the spring band member (23) of the connecting plate (31). A fastening seat (33) for connecting the connecting plate (31) to the connecting base (30) is formed in a horizontal horizontal posture ,
A left and right horizontal base end joint seat (48) on the connecting plate (31), and a projecting end joint seat (49) having an inclined surface inclined obliquely in the left and right upper and lower directions so that the projecting end side approaches the inner surface of the connection target And both joint seats (48, 49) are continuous through the step walls (50),
Connection structure of the constant force spring unit according to tip bonding seat (49), in claim 2 feeding end that is connected with the second fastening member (45) of the spring band member (23) of the connecting plate (31). Constant force spring unit (10) is a plurality of spring band member (23) is any one of claims 1 that contains the spring unit of multi-layered structure is fed out from the spool (22) of 5 in a state of overlapping in the thickness direction Connection structure of the constant load spring unit described in 1. In a state in which a slight clearance (C1) exists in the thickness direction of the connecting plate (31) with respect to the connecting base (30) with one first fastening body (44), the connecting plate (31) is relatively rotated. connection structure of the constant force spring unit according to any one of claims 2 to 5 that have been rotatably connected. The extension end of the spring band (23) is a small clearance (C2) in the thickness direction of the spring band (23) with respect to the connecting plate (31) by one second fastening body (45). connection structure of the constant force spring unit according to claim 7 in a state, that is relatively pivotably connected. A constant load spring unit (10) that is provided between the guide rail (1) and the door panel (2) to move the door panel (2), and resists the moving operation force of the constant load spring unit (10). And a damper (11) for braking the movement of the door panel (2),
The constant load spring unit (10) is connected to the guide rail (1) and the door panel (2) via the connection structure of the constant load spring unit according to any one of claims 1 to 8. A sliding door opening / closing support device comprising the constant load spring unit.

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