JP2007120106A - Brace device for sliding door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a brace device for a sliding door allowing the sliding door to move by a small force without producing rubbing noise and assemblable easily. <P>SOLUTION: The brace device 100 is attached to the upper end face of the sliding door 20 slidably fitted to a rail 11 formed on the lower surface of a head jamb 10. The brace device comprises a mounting part 110 mounted on the upper end face of the sliding door 10, a pair of arm parts 120 attached to the mounting part 110, and a pair of rollers 130 fitted to the ends of the arm parts 120 and allowed to abut on the lateral both inner surfaces of the rail 11. In the rollers 130, the distance α between the outer side surfaces of the rail 11 in contact with the both inner surfaces is slightly larger than the distance β between the both inner surfaces of the rail 11 with the rollers 130 fitted to the ends of the arm parts 120. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an anti-swaying device for a sliding door that is attached to an upper end portion of a sliding door that is slidably fitted into a rail provided on a lower surface of a duck.

  There are the following two anti-swaying devices as this type of anti-swaying device. The first anti-swaying tool includes a mounting portion that is attached to the upper end surface of the sliding door, and a curved piece that is provided on the mounting portion so as to be able to contact the inner surface in the width direction of the rail. (See Patent Document 1). The second anti-swaying tool is a plate-like body that is attached to the upper end surface of the sliding door, and a pair of groove portions provided in the width direction at both ends in the width direction, and a pair of the attachment portions. A pair of rollers that are slidably fitted in the groove portions of the rail and can be brought into contact with both inner side surfaces in the width direction of the rail, and are accommodated in the pair of groove portions of the mounting portion, and the pair of rollers are accommodated in the rail And a pair of springs biased toward both inner surfaces (see Patent Document 2).

  The first anti-swaying tool requires a large force to move the sliding door because the curved piece slides on the inner surface of the rail when the sliding door is moved. Has the disadvantage of producing. On the other hand, the second anti-swaying tool can solve the former drawbacks because the pair of rollers move on both inner side surfaces of the rail.

JP 11-22293 A JP 2002-349131 A

  However, since the second anti-swaying tool has to house the pair of springs in the pair of groove portions of the mounting portion and then house the pair of rollers in the pair of groove portions, Has the other disadvantage of being difficult.

  The present invention was devised in view of the above circumstances, and the object of the present invention is to provide a sliding door that can be moved with a small force without generating scratching noise and can be easily assembled. The object is to provide an anti-sway device.

  In order to solve the above problems, the sliding door anti-swing device of the present invention is a sliding door anti-swing device attached to the upper end or the lower end of the sliding door that is movably fitted to a rail provided in the Kamoi. A mounting portion attached to the upper end surface or the lower end surface of the sliding door, a pair of arm portions provided in the mounting portion, and a tip end portion of the pair of arm portions, and in the width direction of the rail. A pair of rollers capable of contacting both inner surfaces, and the pair of arm portions urge the pair of rollers toward both inner surfaces of the rail. Yes.

  The mounting portion and the pair of arm portions can be formed as a resin plate integrally molded. In this case, the distance between the outer surfaces of the pair of rollers contacting the inner surfaces of the rails is slightly larger than the distance between the inner surfaces of the rails. At this time, it is preferable that the pair of rollers are screwed to the tip ends of the pair of arm portions.

  Alternatively, the attachment portion may be a resin plate-like body, and the pair of arm portions may be an elastic body that is integrally formed with the attachment portion. A bar spring can be used as the pair of arm portions. In this case, the tip of the bar spring is wound around the shafts of the pair of rollers, and the pair of rollers is attached.

  The attachment portion can be provided with a circular screw hole and a semicircular arc-shaped long hole. In this case, it is preferable that at least a part of the mounting surface of the mounting portion is a rough surface.

  In the sliding door swing prevention device according to the first aspect of the present invention, the pair of arm portions urge the pair of rollers toward both inner side surfaces of the rail. For this reason, it is possible to move the sliding door with a small force without causing the sliding sound while preventing the shaking. In addition, since the pair of rollers is simply attached to the tip portions of the pair of arm portions provided in the attachment portion, assembly is easy. For this reason, cost reduction can be achieved.

  In the sliding door swing prevention device according to claim 2 of the present invention, the mounting portion and the pair of arm portions are resin-made plate-like bodies formed integrally, and the inside of the rails of the pair of rollers. The distance between the outer surfaces contacting the side surfaces is slightly larger than the distance between both inner surfaces of the rail. For this reason, when the pair of rollers is accommodated in the rail, the pair of arm portions bends and biases the pair of rollers toward both inner side surfaces of the rail. Since the anti-sway tool can be realized with such a simple configuration, there is an advantage in reducing the cost.

  In the sliding door swing prevention device according to claim 3 of the present invention, since the pair of rollers are screwed to the distal ends of the pair of arm portions, the rollers can be easily attached. Therefore, the assembly of the anti-sway tool is further simplified.

  In the case of the sliding door anti-swing device according to claim 4 of the present invention, the pair of arm portions which are elastic bodies are formed integrally with the resin mounting portion. It can be easily attached to the mounting part. Therefore, the assembly is further simplified.

  When the sliding door swing prevention device according to claim 5 of the present invention is used, the pair of arm portions are bar springs, and the pair of rollers is simply wound around the shaft portions of the pair of rollers. It can be attached to the pair of arms. This further simplifies assembly.

  In the sliding door swing prevention device according to claim 6 of the present invention, the mounting portion is provided with a circular screw hole and a semicircular arc-shaped long hole. A screw is passed through the screw hole and the long hole, and the attachment portion is attached to the upper end surface or the lower end surface of the sliding door. Thus, since one of the holes for inserting the screws provided in the mounting portion is an arc-shaped screw hole, the mounting portion is within the range of the elongated hole with the screw passed through the screw hole as an axis. It can rotate and the attachment angle with respect to the upper end surface or lower end surface of the sliding door of the said attachment part can be changed. Therefore, since it becomes possible to correspond to the rail of various width dimensions, it can be set as a highly versatile anti-sway tool.

  In the case of the sliding door anti-swing device according to claim 7 of the present invention, since at least a part of the mounting surface of the mounting portion is a rough surface, the force acting through the pair of rollers when moving the sliding door. Thus, it is possible to prevent the attachment portion from rotating. For this reason, it is suitable for long-term use.

  Embodiments of the present invention will be described below.

  First, a sliding door anti-swing tool according to a first embodiment of the present invention will be described with reference to the drawings. 1A and 1B are diagrams showing a sliding door anti-swing device according to a first embodiment of the present invention, in which FIG. 1A is a plan view, FIG. 2B is a side view, and FIG. It is a figure which shows a use state, Comprising: (a) is a perspective view, (b) is a top view of the state which permeate | transmitted the duck.

  The anti-swaying device 100 shown in FIGS. 1 and 2 is attached to the upper end of a sliding door 20 that is slidably fitted into a rail 11 provided on the lower surface of the Kamoi 10. A pair of arm portions 120 provided on the mounting portion 110, and a pair of arm portions 120 attached to the distal end portions of the pair of arm portions 120 and in contact with both inner side surfaces of the rail 11 in the width direction. The configuration includes a pair of possible rollers 130. Hereinafter, each part will be described in detail.

  The mounting portion 110 is a resin plate-like body, and two screw holes 111 are arranged in the length direction in the center portion.

  The pair of arm portions 120 are linear plate-like bodies integrally provided at both ends in the length direction of the attachment portion 110. One arm portion 120 is unevenly distributed on one end side in the width direction of the attachment portion 110, and the other arm portion 120 is unevenly distributed on the other end side in the width direction of the attachment portion 110. A screw hole 121 is formed at the distal end portion of the pair of arm portions 120. The width dimension of the pair of arm portions 120 is such that the pair of rollers 130 can be bent in a state where the pair of rollers 130 are in contact with both inner side surfaces of the rail 11. Specifically, it is about 5 mm.

  The pair of rollers 130 are ring-shaped members that are rotatably attached to the screw holes 121 at the distal ends of the pair of arm portions 120 by screws 131, and the diameter thereof is larger than the width dimension of the pair of arm portions 120. ing. For this reason, the outer side part of a pair of roller 130 protrudes from the edge part of the outer side of the width direction of a pair of arm part 120. FIG. In addition, the pair of rollers 130 are attached to the distal end portions of the pair of arm portions 120, and the distance α between the outer surfaces contacting the inner surfaces of the rail 11 (see FIG. 1 (a)) 11 is slightly larger than the distance β (see FIG. 2B) between both inner side surfaces.

  Hereinafter, the anti-swaying tool 100 will be described with respect to its usage and the operation of each part. First, the mounting portion 110 of the anti-swaying tool 100 is brought into surface contact with the upper end surface of the sliding door 20, and in that state, a screw is inserted into the screw hole 111 of the mounting portion 110 and attached to the upper end surface of the sliding door 20.

  Thereafter, as shown in FIG. 2 (a), the upper end of the sliding door 20 is inserted into the rail 11 of the Kamoi 10. Then, the pair of rollers 130 abut against both inner side surfaces of the rail 11, and the pair of arm portions 120 bend inward. Accordingly, the pair of arm portions 120 urges the pair of rollers 130 toward both inner side surfaces of the rail 11.

  In the case of such an anti-swaying tool 100, the pair of arm portions 120 urges the pair of rollers 130 toward both inner side surfaces of the rail 11, so that the sliding door 20 is prevented from shaking, The sliding door 20 can be moved with a small force without generating a rubbing sound. In addition, since the pair of rollers 130 is simply screwed to the distal ends of the pair of arm portions 120 provided in the mounting portion 110, assembly is easy. For this reason, cost reduction can be achieved.

  Next, a swing door anti-swing device according to a second embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a view showing a sliding door anti-swing device according to the second embodiment of the present invention, in which (a) is a plan view, (b) is a side view, (c) is a bottom view, and FIG. Fig. 4 is a view showing a use state of the anti-swaying device, wherein (a) is a plan view showing a state of being attached to a predetermined rail, and (b) is showing a state of being attached to a rail having a width dimension different from that of the rail. FIG. 5 is a plan view and FIG. 5 is a view showing a design change example of the anti-swaying device, wherein (a) is a plan view and (b) is a side view.

  The anti-swaying tool 200 shown in FIG. 3 has the same configuration as the anti-swaying tool 100 except that the shape of the mounting portion 210 is different. Therefore, the difference will be described in detail, and the description of overlapping parts will be omitted.

  The mounting part 210 is a plate-like body made of the same resin as the mounting part 110, and has a circular screw hole 211 provided at the center thereof and a pair of arcuate shapes provided so as to face each other with the screw hole 211 interposed therebetween. And a long hole 212. The screw hole 211 and the pair of long holes 212 are provided side by side in the width direction. The screw hole 211 functions as a screw hole for attaching the attachment portion 210 to the upper end surface of the sliding door 20, and rotates the attachment portion 210 on the upper end surface of the sliding door 20 around the screw passed through the screw hole 211. It also functions as a shaft hole when making them. On the other hand, the long hole 212 functions as a screw hole for attaching the attachment portion 210 to the upper end surface of the sliding door 20 and is a screw passed through the long hole 212 when the attachment portion 210 is rotated on the upper end surface of the sliding door. Functions as a restricting portion that abuts against the end surface of the long hole 212 in the length direction and restricts the rotation range of the attachment portion 210.

  Further, the mounting surface of the mounting portion 210 with respect to the sliding door 20 has a rough surface 213 around the pair of long holes 212 as shown in FIG. The rough surface 213 serves as a slip stopper that prevents the attachment portion 210 from rotating due to the force acting through the pair of rollers 230 when the sliding door 20 moves.

  Hereinafter, the anti-swaying tool 200 will be described with respect to its usage and the operation of each part. First, the mounting portion 210 of the anti-swaying device 200 is brought into surface contact with the upper end surface of the sliding door 20, and in that state, screws are inserted into the screw holes 211 and the pair of long holes 212 of the mounting portion 210. Install.

  At this time, when the distance β between the inner surfaces of the rail 11 is slightly smaller than the distance α between the outer surfaces of the pair of rollers 230 contacting the inner surfaces of the rail 11 (see FIG. 3A). 4A, the attachment portion 210 is attached to the sliding door 20 so as to be substantially parallel to the length direction of the sliding door 20.

  On the other hand, when the distance β between both inner side surfaces of the rail 11 is larger than the distance α (see FIG. 3A) between the outer side surfaces of the pair of rollers 230 that are in contact with both inner side surfaces of the rail 11. In the state where the screws passed through the screw holes 211 and the long holes 212 are slightly loosened, as shown in FIG. 4B, the mounting portion 210 is placed on the upper end surface of the sliding door 20 with the screw passed through the screw holes 211 as an axis. The angle of attachment of the attachment portion 210 to the upper end surface of the sliding door 20 is changed. That is, the attachment part 210 is attached to the sliding door 20 so as to be inclined with respect to the length direction of the sliding door 20. Then, the screws are tightened to fix the attachment portion 210 to the upper end surface of the sliding door 20.

  Thereafter, the upper end of the sliding door 20 is inserted into the rail 11 of the Kamoi 10. Then, as shown in FIG. 4 (a) or FIG. 4 (b), the pair of rollers 230 abut against both inner side surfaces of the rail 11, and the pair of arm portions 220 bend inward. Accordingly, the pair of arm portions 220 urges the pair of rollers 230 toward both inner side surfaces of the rail 11.

  In the case of such an anti-swaying device 200, the pair of arm portions 220 urge the pair of rollers 230 toward both inner side surfaces of the rail 11, while preventing the sliding door 20 from shaking, The sliding door 20 can be moved with a small force without generating a rubbing sound. Moreover, since the screw hole 211 and the long hole 212 are provided in the mounting part 210, the mounting angle of the mounting part 210 with respect to the upper end surface of the sliding door 20 can be easily changed. For this reason, even if the distance β between the inner surfaces of the rail 11 is larger than the distance α between the outer surfaces of the pair of rollers 230 that are in contact with the inner surfaces of the rail 11, it can be easily handled. It becomes possible. Furthermore, since the pair of rollers 230 is simply screwed to the tip ends of the pair of arm portions 220 provided in the attachment portion 210, it can be assembled more easily than the conventional example. For this reason, cost reduction can be achieved.

  In addition, about the attaching parts 110 and 210, although it is a resin-made plate-shaped body, it is not limited to this. That is, any shape that can be attached to the upper end of the sliding door 20 may be used. For example, a metal plate-like body may be used.

  Although the attachment portions 110 and 210 are attached with screws, they may be attached with an adhesive or the like. In this case, the screw holes 111 and 211 and the long hole 212 are not necessary. Further, the screw holes 111 and 211 and the long hole 212 can be provided at arbitrary positions, and only one of them can be provided. For example, as shown in FIG. 5, the screw hole 211 may be provided in the right portion of the attachment portion 210 in the drawing, and the long hole 212 may be provided in the right portion of the attachment portion 210 in the drawing. You may make it arrange | position in the position rotated 90 degrees centering | focusing on the center of the attaching part 210 like the hole 312. Whether or not the mounting surface of the mounting portion is the rough surface 213 is arbitrary.

  The pair of arm portions 120 and 220 may have any shape as long as the pair of rollers 130 and 230 can be urged toward both inner surfaces of the rail 11. In addition, as long as the pair of arms 120 and 220 can be brought into contact with both inner side surfaces of the rail 11, it is optional in which part of the mounting portions 110 and 210 the pair of arms 120 and 220 is provided. The pair of arm portions 120 and 220 is not preferable from the viewpoint of increasing the number of assembling steps and decreasing the strength, but may be separated from the mounting portions 110 and 210.

  The pair of rollers 130 and 230 may be any one that can be attached to the distal end portions of the pair of arm portions 120 and 220 and can move on both inner side surfaces of the rail 11.

  As for means for making the distance α slightly larger than the distance β, the width of the rail 11, the shape of the mounting portions 110 and 210, the shape of the pair of arm portions 120 and 220, and / or the size of the pair of rollers 130 and 230 are set. What is necessary is just to select suitably according to the intensity | strength etc. of each member, and it is not limited to the said Example.

  Next, a swing door anti-swing tool according to a third embodiment of the present invention will be described with reference to the drawings. FIGS. 6A and 6B are views showing a sliding door anti-swing device according to a third embodiment of the present invention, wherein FIG. 6A is a plan view, FIG. 6B is a side view, and FIG. FIGS. 7 and 7 are views showing the use state of the anti-swaying device, wherein (a) is a plan view showing a state where it is attached to a predetermined rail, and (b) is attached to a rail having a width dimension different from that of the rail. FIG. 8 is a view showing a design change example of the anti-swaying device, wherein (a) is a plan view, (b) is a side view, and (c) is a perspective view as seen from below. It is.

  The anti-swaying tool 300 shown in FIG. 6 has the same configuration as the anti-swaying tool 200 except that the shape of the attachment part 310, the shape of the pair of rollers 330, and the pair of arm parts 320 are different. Therefore, the difference will be described in detail, and the description of overlapping parts will be omitted.

  The attachment part 310 is a plate-like body made of the same resin as the attachment part 210, and has a circular screw hole 311 provided at the center thereof and a pair of arcuate shapes provided so as to face each other with the screw hole 311 interposed therebetween. And a long hole 312. The screw hole 311 and the pair of long holes 312 are provided side by side in the length direction. The screw hole 311 is the same as the screw hole 211, and the pair of long holes 312 is the same as the pair of long holes 212.

  The pair of rollers 330 includes a disk-shaped roller main body 331 and a columnar rotating shaft portion 332 protruding downward from the lower surface of the roller main body 331.

  The pair of arm portions 320 are bar springs integrally formed at both end portions in the width direction of the attachment portion 310. One arm portion 320 is unevenly distributed on one end side in the length direction of the attachment portion 310, and has a substantially square shape extending along one end portion in the width direction of the attachment portion 310. The other arm part 320 is unevenly distributed on the other end side in the length direction of the attachment part 310, and has a substantially square shape extending along the other end part in the width direction of the attachment part 310. The tip ends of the pair of arm portions 320 are wound around the rotation shaft portions of the pair of rollers 330.

  Hereinafter, the anti-swaying tool 300 will be described with respect to its usage and the operation of each part. First, the mounting portion 310 of the anti-swaying tool 300 is brought into surface contact with the upper end surface of the sliding door 20, and in that state, screws are inserted into the screw holes 311 and the pair of long holes 312 of the mounting portion 310. Install.

  At this time, when the distance β between the inner surfaces of the rail 11 is slightly smaller than the distance α between the outer surfaces of the pair of rollers 330 that contact the inner surfaces of the rail 11 (see FIG. 6A). As shown in FIG. 7 (a), the attachment portion 310 is attached to the sliding door 20 so as to be substantially parallel to the length direction of the sliding door 20.

  On the other hand, when the distance β between both inner surfaces of the rail 11 is larger than the distance α (see FIG. 6A) between the outer surfaces contacting the both inner surfaces of the rail 11 of the pair of rollers 330. In the state where the screws passed through the screw holes 311 and the long holes 312 are slightly loosened, as shown in FIG. 7B, the mounting portion 310 is placed on the upper end surface of the sliding door 20 with the screw passed through the screw holes 311 as an axis. The angle of attachment of the attachment portion 310 to the upper end surface of the sliding door 20 is changed. That is, the attachment part 310 is attached to the sliding door 20 so as to be inclined with respect to the length direction of the sliding door 20. Then, the screw is tightened, and the attachment portion 310 is attached to the upper end surface of the sliding door 20.

  Thereafter, the upper end of the sliding door 20 is inserted into the rail 11 of the Kamoi 10. Then, as shown in FIG. 7 (a) or FIG. 7 (b), the pair of rollers 330 comes into contact with both inner side surfaces of the rail 11, and the pair of arm portions 320 bend inward. Thereby, the pair of arm portions 320 urges the pair of rollers 330 toward both inner side surfaces of the rail 11.

  In the case of such an anti-swaying device 200, the pair of arm portions 320 urges the pair of rollers 330 toward both inner side surfaces of the rail 11, so that the sliding door 20 is prevented from shaking. The sliding door 20 can be moved with a small force without generating a rubbing sound. Moreover, since the screw hole 311 and the long hole 312 are provided in the mounting portion 310, the mounting angle of the mounting portion 310 with respect to the upper end surface of the sliding door 20 can be easily changed. For this reason, even if the distance β between both inner side surfaces of the rail 11 is larger than the distance α between the outer side surfaces in contact with both inner side surfaces of the rail 11 of the pair of rollers 330, it can be easily handled. It becomes possible. Furthermore, since only the tip ends of the pair of arm portions 320 provided on the attachment portion 310 are wound around the pair of rollers 330, it is possible to assemble more easily than in the conventional example. For this reason, cost reduction can be achieved.

  The attachment portion 310 is a resin plate, but is not limited to this. That is, any shape that can be attached to the upper end of the sliding door 20 may be used. For example, a metal plate-like body may be used.

  Although the attachment portion 310 is attached with a screw, it may be attached with an adhesive or the like. In this case, the screw hole 311 and the long hole 312 are unnecessary. Further, the screw hole 311 and the long hole 312 can be provided at arbitrary positions, and only one of them can be provided. For example, as shown in FIG. 8, only a pair of screw holes 311 may be provided, or the long hole 312 is rotated by 90 ° about the center of the mounting portion 210 as in the long hole 212 of the second embodiment. You may make it arrange | position in a position. Further, it is possible to provide a rough surface 213 on the mounting surface of the mounting portion as in the second embodiment.

  The arm portion 320 is a bar spring, but any member may be used as long as it is a spring material such as a leaf spring or an elastic body such as rubber. Moreover, as long as a pair of roller 330 can contact | abut both the inner surfaces of the rail 11, the arm part 320 is arbitrary in which part of the attachment part 310 is provided. For example, as shown in FIG. 8, the arm portion 320 may be integrally provided at the end portion in the width direction of the attachment portion 310. In this case, the width dimension of the anti-swaying tool 300 can be reduced.

  As for means for slightly increasing the distance α from the distance β, the width of the rail 11, the shape of the mounting portion 310, the shape of the pair of arm portions 320, and / or the size of the pair of rollers 330 are set to the strength of each member. It may be appropriately selected and configured accordingly, and is not limited to the above embodiment.

  In the above-described embodiment, the anti-swaying device is described as being attached to the upper end surface of the sliding door 20 and inserted into the rail 11 provided on the lower surface of the Kamoi 10, but the lower end surface of the sliding door 20. It is also possible to use it by inserting it into the rail 11 provided on the upper surface of the Kamoi 10.

It is a figure which shows the swing prevention tool of the sliding door which concerns on the 1st Embodiment of this invention, Comprising: (a) is a top view, (b) is a side view. It is a figure which shows the use condition of the same anti-swaying tool, (a) is a perspective view, (b) is a top view of the state which permeate | transmitted the duck. It is a figure which shows the swing prevention tool of the sliding door which concerns on the 2nd Embodiment of this invention, Comprising: (a) is a top view, (b) is a side view, (c) is a bottom view. It is a figure which shows the use condition of the same anti-sway tool, (a) is a top view which shows the state attached to the predetermined rail, (b) is a plane which shows the state attached to the rail whose width dimension differs from the said rail FIG. It is a figure which shows the example of a design change of the same shaking prevention tool, (a) is a top view, (b) is a side view. It is a figure which shows the swing prevention tool of the sliding door which concerns on the 3rd Embodiment of this invention, Comprising: (a) is a top view, (b) is a side view, (c) is the perspective view seen from the downward | lower direction. . It is a figure which shows the use condition of the same anti-sway tool, (a) is a top view which shows the state attached to the predetermined rail, (b) is a plane which shows the state attached to the rail whose width dimension differs from the said rail FIG. It is a figure which shows the example of a design change of the shaking prevention tool, (a) is a top view, (b) is a side view, (c) is the perspective view seen from the downward | lower direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Kamoi 11 Rail 20 Sliding door 100, 200, 300 Anti-sway tool 110, 210, 310 Mounting part 120, 220, 320 Arm part 130, 230, 330 Roller 211, 311 Screw hole 212, 312 Long hole 213 Rough surface

Claims (7)

  In the sliding door anti-swing device attached to the upper end or lower end of the sliding door that is movably fitted to the rail provided in the headquarters, the mounting portion attached to the upper or lower end surface of the sliding door, and the mounting portion A pair of provided arm portions, and a pair of rollers attached to the distal ends of the pair of arm portions and capable of coming into contact with both inner side surfaces of the rail in the width direction. A sliding door anti-swing device characterized in that the portion urges the pair of rollers toward both inner surfaces of the rail.   2. The sliding door anti-swing device according to claim 1, wherein the mounting portion and the pair of arm portions are integrally formed resin plate-like bodies and abut against both inner side surfaces of the pair of rollers. The sliding door swing prevention device according to claim 1, wherein a distance between outer side surfaces is slightly larger than a distance between both inner side surfaces of the rail.   3. The sliding door anti-swing device according to claim 1, wherein the pair of rollers are screwed to distal ends of the pair of arms.   2. The sliding door swing prevention device according to claim 1, wherein the attachment portion is a resin plate-like body, and the pair of arm portions are elastic bodies formed integrally with the attachment portion. Anti-swaying device for sliding doors.   5. The sliding door anti-swing device according to claim 4, wherein the pair of arm portions are bar springs, and tip portions thereof are wound around shaft portions of the pair of rollers. .   5. The sliding door anti-swing device according to claim 2, wherein the mounting portion is provided with a circular screw hole and a semicircular arc-shaped long hole. . The sliding door swing prevention device according to claim 6, wherein at least a part of the mounting surface of the mounting portion is a rough surface.

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