Roller assembly for sliding door

Abstract

The disclosed content relates to a roller assembly for a sliding door that enables rapid and easy multi-stage height adjustment of a sliding door by adjusting the distance between a guide rail and a sliding door without the addition of separate components. The disclosed content relates to a roller assembly for a sliding door that is coupled to the upper part of a sliding door and moves along a guide rail fixedly installed in the left-right direction above an entrance, thereby enabling left-right sliding movement of the sliding door, comprising: a door bracket having a plurality of height adjustment fastening holes formed vertically spaced apart in the lower part and a plurality of fine height adjustment holes formed vertically continuously in the upper part, which is fastened to the upper part of the sliding door in contact with the upper part of the sliding door; a fastening bolt that is fastened to the upper part of the sliding door by penetrating only some of the height adjustment fastening holes of the door bracket to allow multi-stage height adjustment of the sliding door; a roller shaft that is fixedly coupled by penetrating one of the fine height adjustment holes of the door bracket to allow fine adjustment of the height of the sliding door; and the An embodiment of a roller assembly for a sliding door is presented, characterized by including a roller that is rotatably coupled to a roller shaft and travels along a guide rail.

Description

Technology Field

[0001] The disclosed content relates to a roller assembly for a sliding door that is coupled to the upper part of the sliding door and moves along a guide rail, enabling left and right sliding movement of the sliding door. Background Technology

[0002] Unless otherwise indicated in this specification, the contents described in this identification item are not prior art for the claims of this application, and are not recognized as prior art simply because they are described in this identification item.

[0004] Generally, sliding doors that open and close by sliding left and right are mainly installed at building entrances and similar areas.

[0005] A roller assembly for a sliding door is attached to the upper part of such a sliding door, which enables left and right sliding movement of the sliding door by traveling along a guide rail fixedly installed in the left and right directions at the top of the entrance.

[0006] As an example of such a roller assembly for a sliding door, Korean Utility Model Registration Publication No. 20-0433635 (published on December 12, 2006) discloses a rotating roller for a sliding door comprising a roller that rotates along a guide rail of a frame, and a roller bracket in which the shaft of the roller is fixed at the top and the corner of the door is fitted and fixed at the bottom, wherein the roller bracket comprises: a plate-shaped vertical piece having a shaft insertion hole formed in the center of the upper side for inserting the shaft of the roller; and a door fixing piece comprising a horizontal plate with a central portion welded to the lower surface of the vertical piece, and a vertical plate formed by bending and extending both ends of the horizontal plate downwardly to form a plurality of bolt holes.

[0007] Meanwhile, when a sliding door is coupled to a guide rail so that it can move left and right with the interposition of a roller assembly for the sliding door, it is necessary to adjust the hanging height of the sliding door by adjusting the distance between the guide rail and the sliding door.

[0008] As an example of a roller assembly for a sliding door that enables the adjustment of the distance between a guide rail and a sliding door, Korean Patent Publication No. 10-1627838 (published June 7, 2016) describes a roller assembly for a sliding door that is coupled to the upper part of a sliding door and supports the sliding door to move along a guide rail, comprising: a roller body that moves along the guide rail; a rear nut disposed at the rear of the roller body; a front coupling shaft disposed at the front of the roller body, having a roller rotation shaft at one end coupled to the rear nut and supporting the rotation of the roller body, and a bracket insertion bolt exposed to the front at the other end; a door coupling bracket, the lower part of which is coupled to the door and the upper part into which the bracket insertion bolt is inserted and coupled; and a nut that is screw-coupled to the bracket insertion bolt exposed to the front through the door coupling bracket to fix the position of the front coupling shaft and the door coupling bracket, wherein the plate surface of the door coupling bracket A roller assembly for a sliding door is disclosed, characterized in that a height adjustment hole into which a bracket insertion bolt is inserted is formed through a certain area, an adjustment bolt insertion hole is formed on the upper surface of the door coupling bracket so as to be in communication with the height adjustment hole, an adjustment bolt coupling hole is formed vertically through the bracket insertion bolt corresponding to the adjustment bolt insertion hole, and a height adjustment bolt is included that is screw-coupled to the adjustment bolt coupling hole through the adjustment bolt insertion hole to adjust the vertical position of the front coupling shaft inside the height adjustment hole, and an adjustment washer is provided on the upper part of the bracket insertion bolt at a position corresponding to the adjustment bolt coupling hole.

[0009] However, in the case of the conventional roller assembly for sliding doors described above, the configuration for adjusting the distance between the guide rail and the sliding door is complex, which not only makes height adjustment of the sliding door difficult but also causes manufacturing costs to increase excessively due to the increased number of components.

[0010] In addition, conventional roller assemblies for sliding doors had a problem in that the rollers could oscillate back and forth within a guide rail with a relatively large width, which could hinder the left-right movement of the sliding door. Prior art literature

[0011] 1. Publication of Patent Registration No. 10-1627838 (Published June 7, 2016) 2. Publication of Patent Registration No. 10-1627838 (Published June 7, 2016) The problem to be solved

[0012] The present invention provides a roller assembly for a sliding door that enables rapid and easy multi-stage height adjustment of the sliding door by adjusting the distance between the guide rail and the sliding door without the addition of separate components.

[0013] The present invention provides a roller assembly for a sliding door that enables stable and smooth left-right movement of the sliding door by supporting the roller so that it cannot oscillate back and forth within a guide rail having a relatively wide width.

[0014] Furthermore, it is evident that the technical challenges are not limited to those described above, and that other technical challenges may be derived from the following description. means of solving the problem

[0015] The disclosed invention presents, as an embodiment, a roller assembly for a sliding door that enables left-right sliding movement of the sliding door by traveling along a guide rail fixedly installed in the left-right direction on the upper part of the sliding door and coupled to the upper part of the sliding door, comprising: a door bracket having a plurality of height adjustment fastening holes formed through the lower part in a multi-stage spaced vertical direction and a plurality of fine height adjustment holes formed continuously through the upper part in a multi-stage vertical direction, which is fastened to the upper part of the sliding door in contact with the upper part of the sliding door; a fastening bolt that is fastened to the upper part of the sliding door by penetrating only some of the height adjustment fastening holes of the door bracket so as to allow the height of the sliding door to be adjusted in multiple stages; a roller shaft that is fixedly coupled by penetrating one of the fine height adjustment holes of the door bracket so as to allow the height of the sliding door to be finely adjusted; and a roller that is rotatably coupled to the roller shaft and travels along the guide rail.

[0016] According to a preferred feature of the disclosed content, the height adjustment fastening holes are formed in a total of 6 holes in 2 rows and 3 columns in the lower part of the door bracket, and the fastening bolt may be fastened to the upper part of the sliding door by passing through only 2 holes in the upper row and 2 holes in the middle row among the 6 height adjustment fastening holes, or may be fastened to the upper part of the sliding door by passing through only 2 holes in the middle row and 2 holes in the lower row among the 6 height adjustment fastening holes.

[0017] According to a preferred feature of the disclosed content, the fine height adjustment holes may be formed through the upper center of the sliding door in a plurality of vertically overlapping portions over a length corresponding to the vertical spacing of the height adjustment fastening holes.

[0018] According to a preferred feature of the disclosed content, the roller shaft can be fixedly coupled to the door bracket by means of a fastening nut that is fastened with a spring washer interposed between the front and rear of the door bracket after passing through one of the fine height adjustment holes of the door bracket.

[0019] According to a preferred feature of the disclosed content, a roller shaft support plate may be inserted into a fine height adjustment hole located directly below one of the fine height adjustment holes through which the roller shaft passes, prior to the fastening of the fastening nut.

[0020] According to a preferred feature of the disclosed content, a guide groove having an isosceles trapezoidal cross section may be formed in the outer surface of the roller.

[0021] According to a preferred feature of the disclosed content, a guide projection that is inserted into the guide groove may be formed protrudingly on the inner lower part of the guide rail. Effects of the invention

[0022] According to a roller assembly for a sliding door according to one embodiment of the disclosed content, the height of the sliding door can be adjusted quickly and easily in multiple stages by adjusting the distance between the guide rail and the sliding door without the addition of separate components, through the selective coupling of a fastening bolt to a plurality of height adjustment fastening holes formed vertically spaced apart in the lower part of the door bracket and the selective coupling of a roller shaft to a plurality of fine height adjustment holes formed vertically in multiple stages in the upper part of the door bracket.

[0023] According to a roller assembly for a sliding door according to one embodiment of the disclosed content, a guide groove having an isosceles trapezoidal cross-section is formed indented on the outer surface of the roller, and a guide projection inserted into the guide groove is formed protrudingly on the inner lower part of the guide rail. As a result, the roller is supported so that it cannot oscillate back and forth within the guide rail having a relatively large width, thereby providing the advantage that the left and right movement of the sliding door can be performed stably and smoothly.

[0024] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description in the claims. Brief explanation of the drawing

[0025] FIG. 1 is a diagram showing the usage state of a roller assembly for a sliding door according to one embodiment of the disclosed content. FIG. 2 is a perspective view of a roller assembly for a sliding door according to one embodiment of the disclosed content. FIG. 3 is an exploded perspective view of a roller assembly for a sliding door according to one embodiment of the disclosed content. FIG. 4 is a multi-stage height adjustment operation diagram of a sliding door by a roller assembly for a sliding door according to one embodiment of the disclosed content. FIG. 5 is a side view of a roller assembly for a sliding door according to one embodiment of the disclosed content that slides along a guide rail. Specific details for implementing the invention

[0026] Hereinafter, the configuration and effects of a preferred embodiment will be examined with reference to the attached drawings. For reference, in the drawings below, each component is omitted or schematically depicted for convenience and clarity, and the size of each component does not reflect its actual size. Furthermore, throughout the specification, the same reference numerals refer to the same components, and reference numerals for the same configuration in individual drawings will be omitted.

[0028] A roller assembly (1) for a sliding door according to an embodiment of the disclosed content is coupled to the upper part of a sliding door (2) installed, for example, in an entrance of a building, as shown in FIG. 1, and moves along a guide rail (3) fixedly installed in the left and right directions on the upper wall of the entrance, for example, thereby enabling the sliding door (2) to slide left and right, so that the entrance can be opened and closed.

[0029] In other words, the roller assembly (1) for a sliding door according to the embodiment of the disclosed content is connected to the upper part of the sliding door (2) so as to be slidably moved left and right along the guide rail (3), and it is preferable that a plurality of, preferably two, are connected to the upper part of the sliding door (2) along the width direction at spaced intervals.

[0030] As shown in FIGS. 2 to 4, the roller assembly (1) for a sliding door comprises: a door bracket (10) which is fastened to the upper part of the sliding door (2) and has a plurality of height adjustment fastening holes (11) formed through it in a multi-stage spaced vertically and a plurality of fine height adjustment holes (12) formed through it in a multi-stage spaced vertically at the lower part; a fastening bolt (20) which is fastened to the upper part of the sliding door (2) by passing through only some of the height adjustment fastening holes (11) of the door bracket (10) to allow the height of the sliding door (2) to be adjusted in a multi-stage manner; a roller shaft (30) which is fixedly coupled by passing through one of the fine height adjustment holes (12) of the door bracket (10) to allow the height of the sliding door (2) to be finely adjusted; and a roller (40) which is rotatably coupled to the roller shaft (30) and travels along a guide rail (3).

[0031] Here, the door bracket (10) serves to allow the roller (40), which will be described later, to be connected to the upper part of the sliding door (2) in a spaced manner upward, with the lower part fastened in contact with the upper part of the sliding door (2) and the roller (40) rotatably connected to the upper part.

[0032] This door bracket (10) can be formed as a rectangular metal plate that extends vertically with a width smaller than the diameter of the roller (40), and it is particularly preferable that the top be cut into a semicircle.

[0033] A plurality of height adjustment fastening holes (11) are formed through the lower part of the door bracket (10) which is fastened to the upper part of the sliding door (2) in a multi-stage spaced manner in the vertical direction.

[0034] The height adjustment fastening holes (11) allow the height of the sliding door (2) to be adjusted at relatively large intervals by adjusting the distance between the guide rail (3) and the sliding door (2) as the fastening bolt (20), which will be described later, is selectively penetrated and fastened. It is preferable that the holes be formed with multiple rows and multiple columns.

[0035] For example, a total of six height adjustment fastening holes (11) can be formed through the lower part of the door bracket (10) in a 2-row, 3-column configuration. In this case, as shown in FIG. 4, the fastening bolt (20) described later passes through only two upper row and two middle row of the six height adjustment fastening holes (11) and is fastened to the upper part of the sliding door (2), thereby shortening the distance between the guide rail (3) and the sliding door (2) and allowing the height of the sliding door (2) to be adjusted to be higher.

[0036] In addition, the fastening bolt (20) described later passes through only two of the central row and two of the lower row of the six height-adjusting fastening holes (11) and is fastened to the upper part of the sliding door (2), thereby increasing the distance between the guide rail (3) and the sliding door (2) and allowing the height of the sliding door (2) to be lowered by the vertical distance of the height-adjusting fastening holes (11).

[0037] For example, if a total of 8 height adjustment fastening holes (11) are formed through the lower part of the door bracket (10) in a 2-row, 4-column configuration, the height of the sliding door (2) is not adjusted to be higher or lower in 2 steps due to the difference in the upper and lower spacing of the height adjustment fastening holes (11) as in the case of the aforementioned 2-row, 3-column configuration, but can be adjusted to be height in 3 steps according to the upper and lower spacing of the height adjustment fastening holes (11).

[0038] In addition, a plurality of fine height adjustment holes (12) are formed through the upper part of the door bracket (10) in a multi-stage continuous manner in the vertical direction.

[0039] The fine height adjustment holes (12) allow the height of the sliding door (2) to be adjusted at relatively fine intervals by adjusting the distance between the guide rail (3) and the sliding door (2) as the roller shaft (30), which will be described later, is selectively penetrated and connected. It is preferable that multiple holes be formed to be connected in the vertical direction or partially overlapped.

[0040] It is preferable that these fine height adjustment holes (12) be formed through a plurality of holes extending vertically and partially overlapping over a length corresponding to the vertical spacing of the height adjustment fastening holes (11), particularly at the upper center of the sliding door (2).

[0041] In this case, the height adjustment of the sliding door (2) through the adjustment of the distance between the guide rail (3) and the sliding door by the selective coupling of the roller shaft (30) to the fine height adjustment hole (12) can be performed in multiple stages at fine intervals by dividing the vertical spacing of the height adjustment fastening hole (11) by a number that is 1 smaller than the total number of fine height adjustment holes (12).

[0042] Accordingly, the height adjustment of the sliding door (2) by the roller assembly (1) for the sliding door according to the embodiment of the disclosed content can be finely adjusted by multiplying the number of adjustment stages by the height adjustment fastening hole (11) and the number of adjustment stages by the fine height adjustment hole (12).

[0043] A fastening bolt (20) passes through some of the height adjustment fastening holes (11) of the aforementioned door bracket (10) and is fastened to the upper part of the sliding door (2).

[0044] The fastening bolt (20) serves not only to securely fasten the aforementioned door bracket (10) to the upper part of the sliding door (2), but also to allow the height of the sliding door (2) to be adjusted in multiple stages at intervals corresponding to the upper and lower intervals of the height adjustment fastening hole (11). It can be formed as a conventional bolt, and a fastening nut may be coupled with a spring washer.

[0045] For fastening the fastening bolt (20), a fastening hole corresponding to a part of the height adjustment fastening hole (11) of the door bracket (10) may be formed through the upper part of the sliding door (2) at a fixed position.

[0046] A roller shaft (30) is passed through and fixedly connected to one of the fine height adjustment holes (12) of the aforementioned door bracket (10).

[0047] The roller shaft (30) serves as a fixed shaft to which the roller (40), which will be described later, is rotatably coupled, and also serves to allow the height of the sliding door (2) to be finely adjusted by the spacing of the fine height adjustment hole (12), and has a shape similar to a bolt.

[0048] At this time, the roller shaft (30) can be fixedly coupled to the door bracket (10) by a fastening nut (32) that is fastened with the interposition of a spring washer (31) at the front and rear of the door bracket (10) after passing through one of the fine height adjustment holes (12) of the door bracket (10).

[0049] In addition, especially when multiple fine height adjustment holes (12) are formed through which they partially overlap in the vertical direction, a roller shaft support plate (13) may be inserted into a fine height adjustment hole (12) located directly below one of the fine height adjustment holes (12) through which the roller shaft (30) passes, prior to the fastening of the fastening nut (32). In this case, the roller shaft support plate (13) is supported from both sides by the fastening nut (32) and supports the lower part of the roller shaft (30), thereby preventing damage to the fine height adjustment hole (12) caused by the roller shaft (30).

[0050] A roller (40) is rotatably coupled to the aforementioned roller shaft (30).

[0051] The roller (40) plays a role in enabling left and right sliding movement of the sliding door (2) while moving along the guide rail (3), and can be formed in the shape of a metal wheel, with a bearing (42) attached to the center.

[0052] The roller (40) may have a guide groove (41) formed on its outer surface with an isosceles trapezoidal cross section so as to reduce the contact area with the guide rail (3) and minimize friction. Depending on the embodiment, the guide groove (41) may be filled with a synthetic resin material, such as hard polyurethane, through a method such as insert injection, for example. In this case, the roller (40) may be configured to prevent noise caused by friction between metals as it comes into rolling contact with the guide rail (3) through the synthetic resin material filled in the guide groove (41).

[0053] In addition, when a guide groove (41) is formed indented on the outer surface of the roller (40), as shown in FIG. 5, a guide projection (4) that is inserted into the guide groove (41) may be formed protrudingly on the inner lower part of the guide rail (3). In this case, the roller (40) is supported so that it cannot oscillate back and forth within the guide rail (3), which has a relatively large width, by the combination of the guide groove (41) and the guide projection (4), and the left and right movement of the sliding door (2) can be performed stably and smoothly.

[0054] In the case of a roller assembly (1) for a sliding door according to one embodiment of the disclosed content as described above, a plurality of height adjustment fastening holes (11) to which a fastening bolt (20) is coupled are formed through the lower part of a door bracket (10) that is fastened to the upper part of the sliding door (2) in contact with the lower part of the sliding door (2) at an angle in the vertical direction, and a plurality of fine height adjustment holes (12) to which a roller shaft (30) is coupled are formed through the upper part of the door bracket (10) in a multi-stage continuous manner in the vertical direction. Accordingly, without the addition of separate components, the height adjustment of the sliding door (2) by adjusting the distance between the guide rail (3) and the sliding door (2) is achieved through the selective coupling of the fastening bolt (20) to the plurality of height adjustment fastening holes (11) formed through the lower part of the door bracket (10) at an angle in the vertical direction and the plurality of fine height adjustment holes (12) formed through the upper part of the door bracket (10) in a multi-stage continuous manner in the vertical direction. Through the selective coupling of the roller shaft (30), it can be quickly and easily adjusted in multiple stages.

[0055] In addition, when a guide groove (41) having an isosceles trapezoidal cross-section is formed indented on the outer surface of the roller (40) and a guide projection (4) inserted into the guide groove (41) is formed protrudingly on the inner lower part of the guide rail (3), the roller (40) is supported so that it cannot oscillate back and forth within the guide rail (3) which has a relatively large width, and the left and right movement of the sliding door (2) can be performed stably and smoothly.

[0057] Although preferred embodiments of the present invention have been described above with reference to the attached drawings, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all technical concepts of the present invention. Therefore, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application. Accordingly, the embodiments described above should be understood as illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims set forth below rather than by the detailed description, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts should be interpreted as being included within the scope of the present invention. Explanation of the symbols

[0058] 1 : Roller assembly for sliding doors 2 : Sliding door 3 : Guide rail 4 : Guide projection 10 : Door bracket 11: Height adjustment fastening hole 12 : Fine height adjustment hole 13: Roller shaft support plate 20: Fastening bolt 30 : Roller shaft 31 : Fastening nut 32 : Spring washer 40 : Roller 41 : Guide Home 42 : Bearing

Claims

Claim 1 A roller assembly for a sliding door that is coupled to the upper part of the sliding door and moves along a guide rail fixedly installed in the left-right direction at the upper part of the doorway, thereby enabling the left-right sliding movement of the sliding door, comprising: a door bracket having a plurality of height adjustment fastening holes formed through the lower part in a multi-stage spaced vertical direction and a plurality of fine height adjustment holes formed continuously through the upper part in a multi-stage vertical direction, which is fastened in contact with the upper part of the sliding door; a fastening bolt that is fastened to the upper part of the sliding door by penetrating only some of the height adjustment fastening holes of the door bracket, thereby allowing the height of the sliding door to be adjusted in multiple stages; a roller shaft that is fixedly coupled by penetrating one of the fine height adjustment holes of the door bracket, thereby allowing the height of the sliding door to be finely adjusted; and a roller that is rotatably coupled to the roller shaft and moves along the guide rail. Claim 2 A roller assembly for a sliding door according to claim 1, wherein the height adjustment fastening holes are formed through the lower part of the door bracket in a 2-row, 3-column arrangement, with a total of 6 holes, and the fastening bolt is fastened to the upper part of the sliding door by passing through only 2 holes in the upper row and 2 holes in the middle row among the 6 height adjustment fastening holes, or is fastened to the upper part of the sliding door by passing through only 2 holes in the middle row and 2 holes in the lower row among the 6 height adjustment fastening holes. Claim 3 A roller assembly for a sliding door according to claim 1, characterized in that the fine height adjustment holes are formed through the upper center of the sliding door in a plurality of ways, partially overlapping in the vertical direction over a length corresponding to the vertical spacing of the height adjustment fastening holes. Claim 4 A roller assembly for a sliding door according to claim 1, characterized in that the roller shaft passes through one of the fine height adjustment holes of the door bracket and is fixedly coupled to the door bracket by a fastening nut that is fastened at the front and rear of the door bracket with the interposition of a spring washer. Claim 5 A roller assembly for a sliding door according to claim 4, characterized in that a roller shaft support plate is inserted into a fine height adjustment hole located directly below one of the fine height adjustment holes through which the roller shaft passes, prior to the fastening of the fastening nut. Claim 6 A roller assembly for a sliding door, characterized in that, in any one of claims 1 to 5, a guide groove having an isosceles trapezoidal cross-section is formed in the outer surface of the roller. Claim 7 A roller assembly for a sliding door according to claim 6, characterized in that a guide projection inserted into the guide groove is formed protrudingly on the inner lower portion of the guide rail.

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