WO2008038472A1

WO2008038472A1 - Slide rail unit

Info

Publication number: WO2008038472A1
Application number: PCT/JP2007/065944
Authority: WO
Inventors: Kaoru Hoshide; Soichi Sasaki
Original assignee: Thk Co., Ltd.
Priority date: 2006-09-28
Filing date: 2007-08-16
Publication date: 2008-04-03
Also published as: JPWO2008038472A1

Abstract

Provided is a slide rail unit including a stationary rail, an intermediate rail to be assembled with the stationary rail through a plurality of balls, and a moving rail to be assembled with the intermediate rail through a plurality of balls. In the longitudinal direction, the intermediate rail can slide relative to the stationary rail, and the moving rail can slide relative to the intermediate rail. The intermediate rail is equipped, at its upper and lower ends, with an upper supporting portion and a lower supporting portion extending in the direction intersecting with the vertical directions in a section normal to the longitudinal direction. The lower supporting portion is equipped with a lower ball guide portion which is sectionally formed into a generally isosceles triangle shape having a bottom side arranged above and which has rolling grooves formed in the individual side portions for the balls. The upper supporting portion is equipped with an upper ball guide portion which is sectionally formed into a generally isosceles triangle shape having a bottom side arranged below and which has rolling grooves formed in the individual side portions for the balls. With the lower supporting portion, there is assembled the stationary rail, which is formed into the generally C-shaped section having the rolling grooves for the balls. With the upper supporting portion, there is assembled the moving rail, which is formed into the generally C-shaped section having the rolling grooves for the balls and which has a flattened upper face. The moving rail is so arranged that it is stacked on the stationary rail.

Description

Specification

Slide Lenore unit

Technical field

[0001] The present invention includes a fixed rail, an intermediate rail, and a moving rail, and in the longitudinal direction, the intermediate rail is slidable with respect to the fixed rail, and the moving rail is slidable with respect to the intermediate rail. The present invention relates to a slide rail unit configured as described above.

This application (September 2006, patent application No. 2006-265118 filed on September 28, 2006) Priority is claimed, and the contents thereof are incorporated herein.

Background art

Conventionally, there are provided slide rail units provided on both sides of furniture and system kitchen drawers for smooth sliding movement. As the slide rail unit described above, for example, Patent Document 1 proposes one having the following configuration.

The fixed rail and the moving rail are substantially flat, and the rolling grooves of the ball are formed by bending the upper and lower ends of the fixed rail and the moving rail along the longitudinal direction. The intermediate rail has a substantially I-shaped cross section orthogonal to the longitudinal direction, and ball rolling grooves are formed by bending the upper and lower ends toward both side surfaces. Then, a fixed rail and a moving rail are respectively disposed so as to face the side surface of the intermediate rail, and a ball is disposed between the rolling groove and the rolling groove that are opposed to each other.

[0003] In the slide rail unit having this configuration, the fixed rail and the moving rail are shaped so that the upper and lower ends thereof are bent so as to hold the ball. When a bending moment or twisting moment is applied by a load that has a small second moment, deformation is likely to occur. In addition, even when the slide rail units installed on both sides of the drawer are misaligned, there is a risk of bending and twisting moments acting on these fixed and moving rails. . By deforming in this way, the moving rail and the intermediate rail However, there is a problem in that the rolling of the ball arranged between the intermediate rail and the fixed rail is hindered and the sliding movement cannot be performed smoothly.

[0004] On the other hand, Patent Document 2 proposes an arrangement in which a moving rail and a fixed rail are stacked in the vertical direction on the upper and lower ends of an intermediate rail having a substantially I-shaped cross section perpendicular to the longitudinal direction. Yes. In the slide rail unit of this configuration, the moving rail and the fixed rail are each configured to be wide, and the secondary moment of the section is increased, so that deformation due to bending moment or torsional moment can be suppressed.

Patent Document 1: JP 2004-113512 A

Patent Document 2: Japanese Patent Laid-Open No. 62-215120

Disclosure of the invention

Problems to be solved by the invention

[0005] However, in the slide rail unit described in Patent Document 2, the intermediate rail has a substantially I-shaped cross section, and is deformed by a bending moment or a torsional moment with a narrow width and a small secondary moment. It has an easy shape. When the intermediate rail is deformed, the rolling of the ball placed between the moving rail and the intermediate rail and between the intermediate rail and the fixed rail is hindered, and the sliding movement cannot be smoothly performed. was there.

[0006] In particular, when a slide rail unit is applied to a slide-type storage such as a refrigerator, the refrigerator body is a resin molded product and is arranged on both sides of the storage that easily deforms when fixing the fixed rail. In some cases, it is not possible to attach the slide rail units accurately. Due to this mounting error, the fixed rail, moving rail, and intermediate rail may be twisted and the sliding movement may not be smooth.

[0007] In addition, in the slide rail unit described in Patent Document 2, the intermediate rail is formed in a substantially I-shaped cross section, and a fixed rail and a moving rail are respectively provided on the upper and lower ends thereof, and three balls in the cross section. It is assembled through. Here, one ball is arranged on the upper and lower end surfaces of the intermediate rail, and it is necessary to form a rolling groove for this ball on the upper surface of the moving rail. For this reason, the upper surface of the moving rail has a shape protruding upward, and it is difficult to attach a member such as a drawer to the moving rail. Means for solving the problem

[0008] The present invention has been made in view of the above-described circumstances, and suppresses deformation such as torsion and deflection of the intermediate rail, the moving rail, and the fixed rail, so that even if there is an attachment error, the smoothness is achieved. It is an object of the present invention to provide a slide rail unit that can be slid and can be easily attached to a moving rail.

[0009] In order to solve this problem, a slide rail unit according to the present invention includes a fixed rail, an intermediate rail assembled to the fixed rail via a plurality of balls, and a plurality of balls on the intermediate rail. A slide rail configured to be slidable relative to the fixed rail in the longitudinal direction, and the movable rail is slidable relative to the intermediate rail in the longitudinal direction. The upper and lower ends of the intermediate rail are provided with an upper support portion and a lower support portion that extend in a direction intersecting with the upper and lower directions in a cross section perpendicular to the longitudinal direction. The lower support portion has a substantially isosceles triangle shape whose cross section is arranged with the base on the upper side, and a rolling groove for the ball is formed on each side ridge portion of the triangle. A ball guide portion is provided, and the upper support portion has an approximately isosceles triangular shape with a bottom disposed at the bottom, and a ball rolling groove is formed on each side ridge portion of the triangle. The lower support portion is assembled with the fixed rail having a substantially C-shaped cross section and formed with a rolling groove for the ball on the inner surface, and is attached to the upper support portion.

The cross section is substantially C-shaped, the ball rolling groove is formed on the inner surface, the moving rail having a flat upper surface is assembled, and the moving rail is stacked on the fixed rail. Arranged to be! /

[0010] In the slide rail unit having this configuration, the intermediate rail has an upper support portion and a lower support portion that extend in a direction intersecting with the vertical direction, so the intermediate rail also has a wide shape. As a result, the moment of inertia of the cross section increases, and it is possible to suppress the deformation S such as torsion and deflection. In addition, the movable rail and fixed rail are also roughly C-shaped in cross section, and are difficult to deform such as torsion and deflection with a large secondary moment.

[0011] Further, the upper support portion and the lower support portion to which the moving rail and the fixed rail are assembled have an upper bow having a cross-sectional isosceles triangle shape and provided with a rolling groove on each side ridge portion. Since the guide rail and the lower ball guide are formed, the movable rail and the fixed rail are supported by the intermediate rail via the three balls arranged in the rolling groove on the cross section orthogonal to the longitudinal direction. Yes. Here, if a torsional moment is applied to the moving rail and fixed rail due to mounting errors, loads, etc., the moving rail and fixed rail will rotate and tilt around these ball guides along the ball. The torsional deformation of the fixed rail, moving rail and intermediate rail can be prevented.

Furthermore, even if the moving rail and the fixed rail are rotated and tilted, they are assembled to the intermediate rail via the three balls in the cross section, so that the sliding movement can be performed smoothly.

[0012] In addition, since the upper ball guide portion has a substantially isosceles triangular shape with the bottom arranged downward, the two balls are arranged upward in the cross section. This makes it possible to form the upper surface flat by forming the ball rolling grooves on both ends of the upper surface of the moving rail. Therefore, a member such as a drawer can be easily attached to the upper surface of the moving rail.

[0013] Here, the intermediate rail may be formed such that a cross section perpendicular to the longitudinal direction is substantially C-shaped.

In this case, since the intermediate rail has a C-shape opening in one direction, it can be formed by roll forming or the like, and this slide rail unit can be immediately manufactured at low cost.

[0014] Further, the intermediate rail may be formed so that a cross section orthogonal to the longitudinal direction has a substantially S-shape.

In this case, the moving rail and the fixed rail are assembled to the intermediate rail from opposite sides, and the ball rolling groove is not exposed on the side surface when the rail is pulled out. It becomes possible.

[0015] Further, in the cross section orthogonal to the longitudinal direction, an attachment portion for attaching a member may be formed on the moving rail between the two balls arranged on the upper surface side of the moving rail.

In this case, by using the mounting part, the storage member such as the drawer can be Can be easily attached to a surface.

[0016] Further, the radius of curvature of the rolling groove is set to be larger than the radius of the ball so that the ball and the rolling groove are in point contact, and the ball has a cross section perpendicular to the longitudinal direction. In each of the above three balls, and the three linear forces connecting the three contact points where the three balls and the three rolling grooves contact each other, the upper ball guide portion or the lower portion The ball guides may be arranged so that they intersect at the approximate center of the triangle.

In this case, the moving rail and the fixed rail force are more easily rotated around the center of the triangle formed by the upper ball guide portion or the lower ball guide portion, and the torsional moment is applied to the moving rail and the fixed rail due to an attachment error or a load. Even if it acts, the deformation of the fixed rail, the moving rail and the intermediate rail can be prevented, and the sliding movement of these rails can be performed smoothly.

The invention's effect

[0017] According to the present invention, deformation such as twisting and deflection of the intermediate rail, the fixed rail, and the moving rail can be suppressed, and the slide rail can be smoothly moved even if there is an attachment error. It is possible to provide a slide rail unit in which a member such as a drawer can be easily attached.

Brief Description of Drawings

[0018] FIG. 1 is a perspective view of a slide rail unit according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the slide rail unit shown in FIG.

FIG. 3 is a cross-sectional view showing an example in which the slide unit shown in FIG. 1 is applied to a slide-type storage for a refrigerator.

FIG. 4 is a cross-sectional view of a slide rail unit that is Modification 1 of the present embodiment.

FIG. 5 is a cross-sectional view of a slide rail unit that is Modification 2 of the present embodiment.

FIG. 6 is a cross-sectional view of a slide rail unit that is a third modification of the present embodiment.

FIG. 7 is a cross-sectional view of a slide rail unit that is a fourth modification of the present embodiment.

FIG. 8 is a cross-sectional view of a slide rail unit that is Modification 5 of the present embodiment.

FIG. 9 is a cross-sectional view of a slide rail unit that is Modification 6 of the present embodiment. Explanation of symbols

[0019] 10 slide rail units, 11 balls, 20 fixed rails,

21 Rolling groove, 30 Intermediate rail, 32A Upper support, 32B Lower support, 33A Upper ball guide, 33B Lower ball guide, 34 Rolling groove, 40 Moving rail, 41 Rolling groove, 42 Upper surface, 43 Mounting Hole (mounting part)

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, a slide rail unit according to an embodiment of the present invention will be described with reference to the accompanying drawings.

1 and 2 show a slide rail unit 10 according to an embodiment of the present invention. The slide rail unit 10 includes a fixed rail 20, an intermediate rail 30 that is assembled to the fixed rail 20 via a plurality of balls 11, and a movable rail 40 that is assembled to the intermediate rail 30 via a plurality of balls 11. Have! /

As shown in FIG. 2, the intermediate rail 30 has a substantially C-shaped cross section perpendicular to the longitudinal direction, and a main body 31 extending in the vertical direction and one side from the upper end of the main body 31 ( An upper support portion 32A protruding toward the right side in FIG. 2 and a lower support portion 32B protruding from the lower end of the main body portion 31 toward one side are provided. That is, the intermediate rail 30 is provided with an upper support portion 32A and a lower support portion 32B extending in a direction intersecting the vertical direction.

[0022] The upper support portion 32A is formed with an upper ball guide portion 33A having a substantially isosceles triangle shape whose cross section is arranged with the bottom side downward. Each side ridge portion of the triangle formed by the upper ball guide portion 33A is recessed toward the inside of the triangle, and serves as a rolling groove 34 on which the ball 11 rolls. As a result, in the cross section, the upper ball guide portion 33A has two balls 11 disposed above and one ball 11 disposed below. In the present embodiment, the upper ball guide portion 33A has a substantially regular triangular cross section, and the three balls 11 are 120 in the circumferential direction around the center of the triangle formed by the upper ball guide portion 33A. ° Arranged at intervals.

[0023] Further, the lower support portion 32B is formed with a lower ball guide portion 33B having a substantially isosceles triangular shape whose cross section is arranged with the base on the upper side. This lower ball guide part 33 Each side ridge portion of the triangle formed by B is recessed toward the inside of the triangle, and serves as a rolling groove 34 on which the ball 11 rolls. Thus, in the cross section, the lower ball guide portion 33B has two balls 11 disposed below and one ball 11 disposed above. In the present embodiment, the lower ball guide portion 33B has a substantially equilateral triangular cross section, and the three balls 11 are arranged in the circumferential direction around the center of the triangle formed by the lower ball guide portion 33B. They are arranged at 120 ° intervals.

[0024] In the present embodiment, the force is opposed to the rolling groove 34 provided on the lower side of the upper ball guide portion 33A and the rolling groove 34 provided on the upper side of the lower ball guide portion 33B. The balls 11 and 11 accommodated in the rolling grooves 34 are arranged so that the positions in the width direction coincide with each other. The intermediate rail 30 has a symmetrical shape with respect to a reference plane that is divided in the vertical direction.

Furthermore, the radius of curvature of the rolling groove 34 is set to be larger than the radius of the ball 11, and the ball 11 and the rolling groove 34 are configured to make point contact. In the cross section, the three centers of the three balls 11 and the three straight lines (three straight lines) connecting the three Bonoles 11 and the three rolling grooves 34 force S and the three contact points respectively contacting each other. Is a straight line connecting the center of any one of the three balls 11 and the contact point of this one ball 1 and one rolling groove 34 that contacts this one ball 1) The upper ball guide portion 33A or the lower ball guide portion 33B are arranged so as to intersect at the center of the triangle.

[0026] The fixed rail 20 has a substantially C-shaped cross section orthogonal to the longitudinal direction, and wraps around the lower ball guide portion 33B so that the opening faces the other side (left side in FIG. 2). It is assembled.

[0027] Three rolling grooves 21 extending in the longitudinal direction are provided on the inner surface of the fixed rail 20, and these rolling grooves 21 are assembled to the intermediate rail 30 in the lower ball guide portion. The three rolling grooves 34 of 33B are arranged so as to face each other. Here, the rolling groove 21 is formed by bending the fixed rail 20 along the longitudinal direction, and the radius of curvature of the rolling groove 21 is set to be larger than the radius of the ball 11, so It is configured to make point contact with the running groove 21. The ball 11 rolls between the rolling groove 34 of the lower ball guide portion 33B and the rolling groove 21 of the fixed rail 20, and slides the intermediate rail 30 in the longitudinal direction relative to the fixed rail 20.

[0028] In addition, the other side wall portion of the fixed rail 20 is provided with a mounting portion 22 that extends toward the other side and extends further upward, for example, to be mounted on the side wall of the refrigerator main body 55 described later. It has been. The mounting portion 22 is provided with a through hole 23 for passing a fixing bolt 57 described later!

[0029] Similar to the fixed rail 20, the movable rail 40 has a substantially C-shaped cross section perpendicular to the longitudinal direction, and the upper ball is oriented so that the opening faces the other side (left side in FIG. 2). It is assembled to wrap around the guide part 33A.

The inner surface of the moving rail 40 is provided with three rolling grooves 41 extending in the longitudinal direction, and these rolling grooves 41 are assembled to the intermediate rail 30 in the upper ball guide portion 33A 3. The two rolling grooves 34 are arranged so as to face each other. Here, the rolling groove 41 is formed by bending the moving rail 40 along the longitudinal direction, and the radius of curvature of the rolling groove 41 is set to be larger than the radius of the ball 11, and the rolling groove 41 and the ball 11 are rolled. It is configured to make point contact with the running groove 4 1.

The ball 11 rolls between the rolling groove 34 of the upper ball guide portion 33A and the rolling groove 41 of the moving rail 40, and slides the moving rail 40 in the longitudinal direction relative to the intermediate rail 30.

[0030] The upper surface 42 of the moving rail 40 is formed in a planar shape extending so as to be orthogonal to the vertical direction, and both ends of the upper surface 42 are bent toward the upper side of the upper ball guide portion 33A. Two rolling grooves 41 41 are formed respectively opposite to the two rolling grooves 34 34 formed. An attachment hole 43 for attaching a storage member such as a storage 50 described later is formed on the upper surface 42 of the moving rail 40.

Further, a protruding portion 44 that protrudes toward one side of the fixed rail 20 is formed on the side wall surface on one side of the moving rail 40.

[0031] The intermediate rail 30, the moving rail 40, and the fixed rail 20 can be formed by roll forming a metal plate. Also, bending and drawing using a press machine It can also be formed by punching or extrusion.

[0032] Further, in the gap between the lower ball guide portion 33B of the intermediate rail 30 and the fixed rail 20, and the gap between the upper ball guide portion 33A of the intermediate rail 30 and the moving rail 40, the balls 11 A retainer (not shown) is arranged for alignment at a predetermined position in the longitudinal direction. The retainer is provided with a ball holding hole (not shown) having a diameter slightly larger than the diameter of the ball 11, and the ball 11 rolls while being accommodated in the ball holding hole. It is configured as follows. In this embodiment, the retainer is made of a synthetic resin.

[0033] The slide rail unit 10 having such a configuration is used by being attached to a slide-type storage 50 of a refrigerator, for example. FIG. 3 shows a cross-sectional view orthogonal to the sliding direction of the storage case 50 to which the slide rail unit 10 according to the present embodiment is applied.

[0034] The slide rail units 10A and 10B according to the present embodiment are arranged on both side surfaces of the storage case 50, respectively.

A fixing bolt 57 is passed through a through hole 23 formed in the mounting portion 22 of the fixed rail 20, and this fixing bolt 57 is screwed into a bolt hole 56 provided on the side wall of the refrigerator main body 55. The fixed rail 20 is fixed to the side wall of the refrigerator body 5. In the present embodiment, as shown in FIG. 3, when the fixed rail 20 is attached, there is a vertical displacement h between the one slide rail unit 10A and the other slide rail unit 10B.

The storage case 50 is provided with mounting groove portions 51 that are open downward on both side surfaces and have a width that is one step larger than the width of the moving rail 40. The mounting groove 51 is disposed so as to cover it, the bottom surface 52 of the mounting groove 51 is brought into contact with the top surface 42 of the moving rail 40, and the mounting bolt 53 is fastened and fixed to the mounting hole 43.

[0036] When the slide-type storage 50 is pulled out of the refrigerator main body 55, the slide rail units 10A and 10B, the moving rail 40 and the storage 50, are integrally slid relative to the intermediate rail 30. At the same time, the intermediate rail 30 slides with respect to the fixed rail 20 fixed to the refrigerator main body 55, and the storage 50 is configured to be greatly opened.

[0037] According to the slide rail unit 10 of the present embodiment, the intermediate rail 30 is arranged in the vertical direction. It has an upper support part 32A and a lower support part 32B extending in the direction intersecting with each other, and has a substantially C-shaped cross section. Etc. can be suppressed. Similarly, the moving rail 40 and the fixed rail 20 have a substantially C-shaped cross section, and are difficult to deform such as torsion and deflection with a large second moment of section.

[0038] Further, the fixed rail 20 and the moving rail 40 have rolling grooves 21 and 41 formed on the inner surface and rolling grooves 34 of the upper ball guide portion 33A and the lower ball guide portion 33B in the cross section orthogonal to the longitudinal direction. Are supported by the intermediate rail 30 via three balls 11 arranged between them and the center of each of these three balls 11 and the contact point of each of the rolling grooves 34. The straight lines are arranged so as to intersect at the center of the triangle formed by the upper ball guide portion 33A and the lower ball guide portion 33B.

Therefore, for example, as shown in FIG. 3, even when a twisting moment is applied to the intermediate rail 30 due to the displacement h at the time of mounting, the triangular shape of the lower ball guide portion 33B along the fixed rail 20, the intermediate rail 30, and the force ball 11 As a result, the fixed rail 20 and the intermediate rail 30 can be prevented from being deformed. Similarly, even when a load acts on the storage 50 and a torsional moment acts on the moving rail 40, the moving rail 40 rotates along the ball 11 around the center of the triangle of the upper ball guide portion 33A, The deformation of the moving rail 40 and the intermediate rail 30 can be prevented.

[0039] Further, even if the fixed rail 20 and the moving rail 40 are rotated and inclined, the ball 11 is interposed between the intermediate rail 30 and the sliding movement can be performed smoothly. In this embodiment, the radius of curvature of the rolling grooves 21, 41 and the rolling grooves 34 is set to be larger than the radius of the ball 11, and the balls 11, the rolling grooves 21, 41, and the rolling grooves 34 are dotted. Since they are configured to come into contact with each other, even when the fixed rail 20 and the moving rail 40 are inclined, the sliding movement that does not hinder the rolling of the bow 11 can be performed smoothly.

[0040] Further, the upper surface 42 of the moving rail 40 is formed flat, and a mounting hole 43 is formed between the two balls 11 and 11 positioned above the upper support portion 32A in the cross section orthogonal to the longitudinal direction. The storage 50 can be easily attached to the upper surface 42 of the moving rail 40. wear. In the present embodiment, since the mounting groove portions 51 are formed on both side surfaces of the storage case 50, the storage case 50 is formed by bringing the bottom surface 52 of the mounting groove portion 51 into close contact with the upper surface 42 of the moving rail 40. Supported by moving rail 40.

[0041] Further, since the intermediate rail 30 has a substantially C-shaped cross section and the upper ball guide portion 33A and the lower ball guide portion 33B are bent into a substantially equilateral triangular shape, the metal plate is The intermediate rail 30 can be formed by bending, and can be manufactured at low cost by roll forming or the like.

The moving rail 40 and the fixed rail 20 also have a substantially C-shaped cross section, and the rolling grooves 21 and 41 of the ball 11 are formed by bending, so that it can be manufactured at low cost by roll forming, etc. .

Furthermore, in the present embodiment, since the protruding portion 44 that protrudes to one side of the fixed rail 20 is formed on one side surface of the moving rail 40, the container 50 attached to the moving rail 40 and The contact with the fixed rail 20 can be prevented, and the container 50 can be smoothly slid.

Next, a modification of the present embodiment will be described.

Modification 1 shown in FIG. 4 is formed by bending the upper ball guide portion 33A and the lower ball guide portion 33B of the intermediate rail 30 toward the inside of the C-shape formed by the cross section of the intermediate rail 30.

In Modification 2 shown in FIG. 5, a rib 61 is formed on the main body 31 of the intermediate rail 30 to improve the rigidity.

[0044] In Modification 3 shown in Fig. 6, the intermediate rail 30 is formed in an S-shaped cross section. In this case, the moving rail 40 and the fixed rail 20 are assembled with respect to the intermediate rail 30 from opposite sides. When these rails are pulled out, the ball 11 is viewed from the other side (left side in FIG. 6). Can be configured not to be exposed. In the third modification, the upper ball guide portion 33A is formed so as to be shifted to one side of the lower ball guide portion 33B, and the moving rail 40 is located on one side of the fixed rail 20. It is configured.

[0045] In Modification 4 shown in Fig. 7, the intermediate rail 30 is formed in an S-shaped cross section and the upper ball The width direction positions of the guide portion 33A and the lower ball guide portion 33B are matched! However, the other side (FIG. 7! /, Left side) force One side (right side in FIG. 7) end of the assembled moving rail 40 protrudes toward the one side of the fixed rail 20 toward the one side. 62 is provided. This prevents contact between the housing member attached to the moving rail 40 and the fixed rail 20.

[0046] Modification 5 shown in Fig. 8 is formed by reversing the bending directions of the upper ball guide portion 33A and the lower ball guide portion 33B of the intermediate rail 30 shown in Fig. 6.

In Modification 6 shown in FIG. 9, the intermediate rail 30 is formed in an S-shaped cross section, and the bending angle is made gentle to facilitate forming by roll forming or the like.

As described above, the force S described for the slide rail unit according to the embodiment of the present invention, the present invention is not limited to this, and can be appropriately changed without departing from the technical idea of the present invention.

For example, the force described as the slide rail unit applied to the slide-type storage of the refrigerator may be applied to furniture drawers and paper trays of copying machines. However, when fixing the fixed rail to the refrigerator main body of a resin molded product such as a refrigerator, it is particularly effective to apply the slide rail unit of the present invention because an attachment error is likely to occur due to deformation of the refrigerator main body. It is.

[0048] In addition, although it has been described that a mounting bolt is used as a method of attaching a storage (accommodating member) to the moving rail, other mounting methods may be applied without being limited thereto.

Furthermore, the shape of the intermediate rail may be set as appropriate in accordance with the required performance with a high degree of design freedom, as shown in the embodiments and modifications.

Claims

The scope of the claims

[1] A fixed rail, an intermediate rail that is assembled to the fixed rail via a plurality of balls, and a moving rail that is assembled to the intermediate rail via a plurality of balls. Is a slide rail unit configured to be slidable with respect to the fixed rail, and the movable rail is slidable with respect to the intermediate rail,

The upper and lower ends of the intermediate rail are provided with an upper support portion and a lower support portion that extend in a direction intersecting with the vertical direction in a cross section perpendicular to the longitudinal direction. The cross-section is a substantially isosceles triangle shape with the base positioned upward, and a lower ball guide portion in which a rolling groove of the ball is formed on each side ridge portion of the triangle is provided,

The upper support portion is provided with an upper ball guide portion in which the cross-section is a substantially isosceles triangle shape with the bottom arranged downward, and a ball rolling groove is formed on each side ridge portion of the triangle,

The lower support part is assembled with the fixed rail in which the cross section is substantially C-shaped and the ball rolling groove is formed on the inner surface,

The upper support portion is assembled with the moving rail having a flat upper surface and a rolling groove for the ball formed on the inner surface of the upper support portion. The slide rail unit is arranged so that the moving rails are stacked! /.

[2] The slide rail unit according to claim 1, wherein the intermediate rail has a substantially C-shaped cross section orthogonal to the longitudinal direction.

[3] The slide rail unit according to claim 1, wherein the intermediate rail has a substantially S-shaped cross section orthogonal to the longitudinal direction.

[4] In the cross section orthogonal to the longitudinal direction, an attachment portion for attaching a member is formed on the moving rail between the two balls arranged on the upper surface side of the moving rail.

The slide rail unit according to claim 1, wherein the slide rail unit is V.

[5] The radius of curvature of the rolling groove is set larger than the radius of the ball, The rolling groove is configured to make point contact,

In the cross-section perpendicular to the longitudinal direction, the ball is connected to the center of each of the three balls and the three contact points where the three balls and the three rolling grooves contact each other. 2. The slide rail unit according to claim 1, wherein the straight rails are arranged so as to intersect at an approximate center of a triangle formed by the upper ball guide portion or the lower ball guide portion.