JP2020099447A - Double slide rail with interlocking device - Google Patents

Abstract

To provide a double slide rail that stabilizes the drawing force by reducing positional displacement of a ball retainer.SOLUTION: A double slide rail has: first, second outer members; a first inner member slidably held in the first outer member at the ball; a second inner member slidably held in the second outer member at the ball; a first ball retainer for rotatably holding the ball of the first outer member side; and a second ball retainer for rotatably holding the ball of the second outer member side. The double slide rail integrally formed of the first, second inner members and stretched into 2-stages is equipped with a first interlocking device for making the slide of the first ball retainer follow the slide of the first outer member and a second interlocking device for making the slide of the second ball retainer follow the slide of the second outer member.SELECTED DRAWING: Figure 1

Description

The present invention includes a first outer member, a second outer member, a first inner member slidably held by a ball on the first outer member, and a ball slidably on a second outer member as well. A second inner member that is held, a first ball retainer that rotatably holds balls on the first outer member side, and a second ball retainer that rotatably holds balls on the second outer member side, The present invention relates to a double slide rail that extends a slide rail in two stages by connecting a first inner member and a second inner member to realize a stable sliding force in a double slide rail having a large slide amount.

Conventionally, in a double slide rail with a large amount of sliding as described above, a roller mounting member is projected outward from an inner member, a rubber roller is rotatably held on the roller mounting member, and is connected from either one of the outer members. A member in which the member is projected to the outside of the roller mounting member and the end surface of the rubber roller is brought into contact with the bent edge of the other outer member and the connecting member is implemented by the applicant of the present application (see Patent Document 1). ).
This double slide rail transmits the movement of the outer member to the inner rail via a roller, synchronizes the movements of the outer member and the inner member, and makes the pulling force of the double slide rail constant.

However, even if the movements of the outer member and the inner member are synchronized, the ball retainer of the slide rail has the same movement amount for each slide rail due to the sliding speed of the slide rail and the load on the slide rail. It doesn't. As described in Patent Document 2 and Patent Document 3, as a result of repeated sliding of the slide rail, the ball retainer is displaced from the initial setting position toward the extension side or the contraction side of the slide rail. Is well known to.
In this way, when there is a large positional deviation in the ball retainer, it is necessary to forcibly correct the position of the ball retainer to the initial setting position when the slide rail is extended or contracted. A method of providing a hitting piece and correcting the position of the ball retainer by an inner rail is adopted.

When correcting the position of this ball retainer, the ball retainer is corrected by dragging it between the outer rail and the inner rail, and the balls of the ball retainer that are in contact with the outer rail and the inner rail cannot roll. It becomes a state.
Therefore, at the time of the correction, since the ball retainer is slid so that the ball is dragged without rolling, a force larger than the normal pull-out force or push-in force of the slide rail is required, and the pull-out force or push-in force of the slide rail is slid. The power could not be stabilized.

In particular, when the slide rail is used in a vertical direction in which it extends and contracts in the vertical direction, the weight of the ball retainer is applied, and the ball retainer is displaced downward. Therefore, when the slide rail in the contracted state is extended (pulled up), the lowered ball retainer is lifted, and it is remarkable that a pull-out force that is larger than the normal pull-out force of the slide rail is required.
More specifically, the outer member to be pulled up theoretically moves twice as much as the moving distance of the ball retainer due to the rotation of the ball.
However, the outer member that is pulled up moves up and down by external force such as human power, so it is not affected by gravity, but the ball retainer is always loaded with gravity downward, so when the outer member rises, Half the moving distance of the outer member may not move, and when the moving member is descending, it may move more than half the moving distance of the moving member.
That is, a ball creep phenomenon (deviation between the movement of the ball and the outer member that is pulled up) is likely to occur, and the ball retainer is likely to be displaced downward from the outer member that is pulled up. In particular, the vertical slide guide device could not stabilize the pullout force. ..
As described above, there is no double slide rail in which the slide rail is extended in two stages and the slide amount is increased to control the movement of the ball retainer and realize a stable sliding force.

Japanese Utility Model Publication No. 62-008762 Japanese Patent No. 4695888 JP, 2004-131993, A

In view of the above problems, it is an object of the present invention to provide a double slide rail that stabilizes the pullout force by suppressing the positional displacement of the ball retainer.

In order to solve the above-mentioned problems, the present invention is configured as a first means in that a first outer member, a second outer member, and a first inner member slidably held by a ball on the first outer member. A second inner member slidably held on the second outer member by a ball, a first ball retainer rotatably holding a ball on the first outer member side, and a ball on the second outer member side. In the double slide rail which has a 2nd ball retainer rotatably hold|maintained and which extends a slide rail in two steps by integrally forming a 1st inner member and a 2nd inner member, with respect to a 1st outer member. A first interlocking device for making the sliding of the first ball retainer follow the sliding of the first inner member, and a second interlocking device for making the sliding of the second ball retainer follow the sliding of the second inner member with respect to the second outer member. It is equipped with a device.

In order to solve the above problems, the present invention is configured as a second means. In addition to the first means, the first outer member, the first inner member and the second inner member can be slid integrally. The inner member body thus formed and a third interlocking device for interlocking the sliding movement of the second outer member are provided.

In order to solve the above problems, the present invention is configured as a third means. In addition to the second means, one end of the third interlocking device is connected to the contracting side of the first outer rail and the other end is the first end. 2 A first interlocking string that is connected to the contraction side of the outer rail and that is hooked to a first guide portion provided on the extension side of the inner member body at the middle portion, and one end is connected to the extension side of the first outer rail, and the other The end is connected to the extension side of the second outer rail, and is composed of a second interlocking string which is hooked to a second guide portion provided on the contraction side of the inner member body at an intermediate portion.

In order to solve the above problems, the present invention is configured as a fourth means, in addition to the first means, the second means, or the third means, the first interlocking device has the first ball. The first endless belt is attached across the sliding direction via left and right belt guide members provided at both ends of the retainer in the sliding direction, and a part of the first endless belt on the first inner member side and the first endless belt. A predetermined part of the inner member is connected, and a part of the first endless belt on the side of the first outer member is connected to a predetermined part of the first outer member. The second interlocking device includes a second ball retainer. A second endless belt is attached across the sliding direction via left and right belt guide members provided at both ends in the sliding direction, and a part of the second endless belt on the second inner member side and the second inner member. Are connected to each other, and a part of the endless belt on the second outer member side is connected to a predetermined position of the second outer member.

According to the first aspect of the present invention, the first interlocking device causes the first ball retainer to follow the sliding movement of the first inner member with respect to the first outer member, so that the first ball retainer moves relative to the first outer rail. As a result, the second rail retainer is made to follow the sliding of the second inner member with respect to the second outer member by the second interlocking device as well as the positional deviation that greatly affects the pulling out and pushing force of the slide rail does not occur. As a result, there is no positional deviation of the slide rail with respect to the second outer rail, which greatly affects the pulling-out and pushing-in force of the slide rail. Therefore, the positional deviation of the ball retainer during the process of minimum contraction and maximum expansion of the double slide rail is prevented. No need to straighten, the sliding force is stable when the inner rail slides on the outer rail or when the outer rail slides on the inner rail, and is stable even with double slide rails that expand and contract in two stages. The sliding force can be realized.

According to the second aspect of the present invention, in addition to the effect of the first aspect, the sliding of the first outer member, the inner member body, and the second outer member is also interlocked, so double slide The first outer member, the first ball retainer, and the inner member body, as well as the inner member body, the second inner member, and the second outer member all follow and slide during the process from the minimum contraction to the maximum expansion of the rail. Therefore, a more stable sliding force can be realized even with a double slide rail that expands and contracts in two stages.

According to the third aspect of the present invention, in addition to the second aspect, the first outer member, the inner member body, and the second outer member slide together in a simple configuration. be able to.

According to the fourth aspect of the present invention, the first interlocking device is accommodated between the first outer member and the first inner member, and the second interlocking device is disposed between the second outer member and the second inner member. Since it fits, the entire double slide rail with interlocking device does not become large.

The perspective view of the most extended state of the present invention. The perspective view of the most contracted state of the present invention. The exploded perspective view of the extension state of the present invention. The surface side perspective view of a 2nd fitting member. The back side perspective view of the 2nd fitting member. The perspective view of a belt guide member. Explanatory drawing which shows the operation|work which hold|maintains a 2nd positioning member to a 2nd fitting member. Explanatory drawing which shows the operation|work which hold|maintains a 1st positioning member to a 1st fitting member. The perspective view of a fixed member. The perspective view of a guide member. The extension side side view of this invention. FIG. 6 is a hexahedral view of the double slide rail of the present invention in a contracted state. 6A and 6B are six views of the fixing member of the present invention. 6A and 6B are six views of the guide member of the present invention. The AA line sectional enlarged view of FIG. The principal part enlarged view of FIG.

A first outer member, a second outer member, a first inner member slidably held by a ball on the first outer member, and a second inner member slidably held by a ball on a second outer member. A first ball retainer that rotatably holds the balls on the first outer member side; and a second ball retainer that rotatably holds the balls on the second outer member side. 2 By forming the inner member integrally, slide on the double slide rail that extends the slide rail in two steps through the left and right belt guide members provided at both ends in the sliding direction of the first ball retainer. A first endless belt is attached across the direction, a part of the first inner member on the first inner member side is connected to a predetermined portion of the first inner member, and a part of the first endless belt on the first outer member side is connected. And a first interlocking device that causes the sliding of the first inner retainer to follow the sliding of the first inner retainer with respect to the first outer member configured by connecting predetermined locations of the first outer retainer and the sliding of the second outer retainer. The second endless belt is attached across the sliding direction via the left and right belt guide members provided at both ends in the direction, and a part of the second endless belt on the second inner member side and the predetermined portion of the second inner member. Sliding of the second inner member with respect to the second outer member, which is formed by connecting parts of the endless belt on the second outer member side and predetermined parts of the second outer member. And a second interlocking device that follows the first end of the first outer rail, and the other end of the second outer rail that is connected to the contraction side of the first outer rail. 1 The 1st interlocking string hung on the guide part, one end is connected to the extension side of the 1st outer rail, the other end is connected to the extension side of the 2nd outer rail, and the contraction side of the inner member body at the intermediate part. A second interlocking string to be hung on a second guide portion provided on the first outer member, an inner member body in which the first inner member and the second inner member are integrally slidable, and 2 A third interlocking device for interlocking the sliding movement of the outer member is provided.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
1, 2, and 3, reference numeral 1 indicates a first outer member, reference numeral 2 indicates a first inner member, reference numeral 3 indicates a first ball retainer, reference numeral 5 indicates a first interlocking device, Reference numeral 10 represents a second outer member, reference numeral 20 represents a second inner member, reference numeral 30 represents a second ball retainer, reference numeral 50 represents a second interlocking device, reference numeral 6 represents an inner member body, and reference numeral Reference numeral 7 indicates a third interlocking device.
For the sake of convenience, the sliding direction of the double slide rail will be described as the front-rear direction, the extension side direction as the front, and the contraction side direction as the rear, and the bending edges 13, 13 of the first outer member 1 described below will be referred to as the up-down direction. ..

Since the first outer member 1 and the second outer member 10 have the same shape, only the first outer member 1 will be described.
The first outer member 1 has a substrate 11 made of a strip-shaped metal plate, and ball sliding grooves 12, 12 in the inner surface longitudinal direction formed by curving both ends on the shorter side of the substrate 11 in an inward arc shape. The bent edges 13 and 13 are formed into a substantially C-shaped cross section. Further, stoppers 14 and 14 of the first inner member 2, which are formed by bending a part of the substrate 11 inward, are provided at the front and rear ends of the substrate 11. A second fitting locking hole 11A is formed in the center of the board 11 in the sliding direction, to which a part of the endless belt 51 of the first interlocking device 5 is connected via the second fitting member 511. The double slide rail 100 is provided with a mounting hole 11f for mounting on an article.
As shown in FIG. 2 in the most contracted state of the double slide rail 100, the mounting hole 101f at the extension end of the second outer rail 10 and the mounting hole 11f at the extension end of the first outer rail 1 are visually recognized in this state. The double slide rail 100 is ready to be attached to the article.

The second fitting locking hole 11A (see FIG. 7) is a rectangular through hole 11b that is horizontally long in the sliding direction, and faces the sliding hole inside the through hole 11b in the sliding direction. The second mounting portions 11d... Having the band protruding holes 11c and projecting toward the first inner member 2 side in the inner direction so as to oppose each other, and the second mounting portions 11d... The ends on the long side of the four sides which are located between and which form the through hole 11b of the substrate 11 are the second front and rear locking portions 11e, 11e.

Then, an interlocking base material 71, which is a constituent member of a third interlocking device 7 described later, is fixed to the opposite side surfaces of the refraction edges 13, 13 of the substrate 11 of the first outer member 1. Similarly, the interlocking base material 71 is also fixed to the substrate 101 of the second outer member 10.

The interlocking base material 71 is a plate-shaped rectangle formed to have substantially the same length as the sliding direction length of the first outer member 1 or the second outer member 2, and the interlocking base member 71 of the first outer member 1 and the second outer member 2 is formed. It is formed to have a size that protrudes from the one side of the refraction edges 13 and 103 (upper side in FIG. 15), and is bonded to the substrate 11 of the first outer member 1 and the base material 101 of the second outer member 10 by a flat portion. To be fixed as. Further, mounting portions 711, 711 are formed on the front and rear sliding end sides of the interlocking base material 71, respectively.

Since the mounting portion 711 is symmetrically formed at the front end portion and the rear end portion, only the front end portion side will be described.
The attachment portion 711 on the front end side is provided at the front end portion of the portion projecting from the first outer member 1 or the second outer member 2, and is a vertically long rectangle formed from the front end toward the rear. 711a, and the cut-and-raised pieces 711b and 711b formed by bulging from the upper and lower ends of the notch 711a toward the inner member body 6 and extending vertically from the bulged end so as to face each other. The raised pieces 711b and 711b include fixed grooves 711c in the gap formed at the tips thereof.
Then, fixing members 72, 72 described later are attached to the attaching portions 711, 711.

Since the first inner member 2 and the second inner member 20 have the same shape, only the first inner member 2 will be described.
The first inner member 2 is about two-fifths of the length of the first outer member 1, and is a substrate 21 made of a strip-shaped metal plate having a size that can be inserted into the first outer member 1, and a short side of the substrate 21. Is formed in a C-shaped cross section by refraction edges 23 and 23 having ball sliding grooves 22 and 22 in the outer surface longitudinal direction, which are formed by curving both end portions in an outward arc shape.
A first fitting locking hole 21A for holding a part of the endless belt 51 via a first fitting member 512, which will be described later, is formed in the center of the board 21 in the sliding direction.

The first fitting locking hole 21A (see FIG. 8) is formed in the same shape as facing the second fitting locking hole 11A. That is, it has a rectangular through hole 21b horizontally long in the sliding direction, a first band projecting hole 21c facing the sliding direction, and a first band projecting hole 21c at the center in the lateral direction. Of the four sides that have the first mounting portions 21d... that protrude to the side and are located between the first mounting portions 21d... that face each other in the sliding direction and that form the through holes 21b of the substrate 21. The ends on the long side are the first front and rear locking portions 21e, 21e.

The first fitting locking hole 21A and the second fitting member are the first fitting member 512 and the second fitting member 511 which are fitted into the first fitting locking hole 21A and the second fitting locking hole 11A. The fitting direction is opposed to the stop hole 11A, but they are formed in the same shape, so only the second fitting member 511 fitted into the second fitting locking hole 11A will be described.
The second fitting member 511 (see FIGS. 4, 5, and 7) is a left-right front-rear mounting protrusion that is mounted on the second mounting portion 11d... Of the second fitting locking hole 11A. 511a... Connects between the ends in the sliding direction at front and rear walls 511b, 511b formed by projecting outward at both ends in the sliding direction at the upper end, and at the lower ends of the front and rear walls 511b, 511b, Left and right support portions 511c and 511c of the band lower surface where the endless belt 51 contacts the upper surface, a holding hole 511d that holds the second positioning member 51b attached to a predetermined position of the endless belt 51, and predetermined positions on the outer surfaces of the front and rear walls 511b and 511b. Is integrally formed of a synthetic resin material from locking projections 511e and 511e which are formed in the front-rear direction and extend in the sliding direction and which are locked to the lower surfaces of the first front-rear locking portions 21e and 21e. It is configured.

Then, the first inner member 2 and the second inner member 20 are fixed to the inner member connecting member 60 to form the inner member body 6.
The inner member connecting member 60 includes a plate-shaped rectangular connecting body 601 formed to have a length substantially the same as the sliding direction length of the first outer member 1 or the second outer member 2, and one vertical end portion of the connecting body 601. However, the reinforcing piece 602 is formed by being bent toward the first inner member 2 side, and the rigidity of the inner member connecting member 60 is secured. The other end of the connecting body 601 facing the reinforcing piece 602 is formed to have a size that protrudes from the first outer member 1 and the second outer member 2 (upper side in FIG. 11 ). The projection is projected in the same direction as the projection side of the interlocking base material 71 described above.
Fixed rectangular notches 60a, 60a elongated in the front-rear direction are formed on the front-rear front and rear end sides of the protrusion, respectively.
Then, guide members 73, 73 described later are attached to the fixed notches 60a, 60a.

As shown in FIGS. 3 and 15, the inner member body 6 is located near the reinforcing piece 602 below the plane on which the reinforcing piece 602 of the connecting body 601 is bent, and at the rear end in the sliding direction of the double slide rail. The first inner member 2 is fixed to the first inner member 2 and the first inner member 2 of the connecting body 601 is opposite to the plane, and the second inner member 20 is on the front end side in the opposite direction to the first inner member 2. Is fixed.
In this way, the first inner member 2 and the second inner member 20 are fixed to the connecting body 601 while being separated on one side and the other side in the sliding direction, and as shown in FIGS. They are arranged symmetrically in an end view.

The first ball retainer 3 is a band-shaped metal plate and has a size that can be inserted between the first outer member 1 and the first inner member 2 and has a length of about two thirds of the first outer member 1. , The substrate 31 and the refraction edges 32 and 32, and a plurality of balls 3A... Are rotatably held at several positions in the longitudinal direction of the refraction edges 32 and 32, and are arranged at both ends of the substrate 31 in the sliding direction. The left and right belt guide members 513 and 513 facing each other in the sliding direction are detachably attached.

Since the left and right belt guide members 513 and 513 are simply arranged with the same shape members facing each other in the sliding direction, only the front side belt guide member 513 will be described.
The belt guide member 513 (see FIG. 6) has front and rear fitting grooves 513b and 513b fitted in the guide member mounting notch 34 formed at the front end portion of the substrate 31 of the first ball retainer 3 in the sliding direction of the front and rear end surfaces. The front and rear fitting grooves 513d and 513d, which are located in front of the connecting portion 513a by a predetermined dimension and fit in the guide member mounting notch 34, are formed in the sliding direction of the front and rear end surfaces. The guide walls 513c and 513c, a guide portion 513g that is formed in a substantially U-shape from the folded back support wall 513e that is continuously provided at the rear end portions of the front and rear guide walls 513c and 513c, and the endless belt 51 is folded back, and the connection portion 513a. An elastically deformable elastic imparting portion 513f that is substantially U-shaped and expands and contracts in the sliding direction is continuously formed between the guide portions 513g and is integrally formed of a synthetic resin material.

The endless belt 51 is formed into a ring shape with a wide string-like body, and is provided on the outer surfaces of the folding support walls 513e and 513e of the left and right belt guide members 513 and 513 provided at the sliding side end portions of the first ball retainer 3. The front and rear widths of the first ball retainer 3 are closely contacted with each other, the front and rear widths of the front and rear guide walls 513c, 513c are substantially the same, and the first ball retainer 3 is bridged in the sliding direction.
In this state, the endless belt 51 with respect to the first ball retainer 3 can be transported and rotated between the front and rear guide walls 513c and 513c with the front and rear guide walls 513c and 513c as rotation axes like a belt conveyor.
The first positioning member 51a and the second positioning member 51b are provided at predetermined positions on the first inner member 2 side and the first outer member 1 side.
In the present embodiment, the endless belt 51 has a wide cord shape, but a thin cord or a wire rope may be used.

Since the first positioning member 51a and the second positioning member 51b are formed in the same shape, only the second positioning member 51b will be described.
The second positioning member 51b has a size that substantially matches the front-rear and vertical dimensions of the holding hole 511d of the second fitting member 511, which is formed by folding a metal plate material into a flat U-shape with the endless belt 51 sandwiched therebetween and crimping. .. That is, the second positioning member 51b is fitted and held in the holding hole 511d of the second fitting member 511 from the side facing the first inner member 2.
Therefore, in the connecting base material 71, the second fitting member 511 on the first outer member 1 side, the second positioning member 51b, and the second fitting member 511 on the second outer member 10 side, the second positioning member 51b. The through holes 71b and 71b, which are the passages when attaching, are the through holes 71b and 71b, respectively, the second fitting locking hole 11A of the first outer member 1 and the second fitting locking hole 101A of the second outer member 10. It is provided so as to face from.

Similarly, the first positioning members 51a and 51a are fitted to the second fitting members 512 and 512 of the first inner member 2 and the second inner member 20, respectively. Side first fitting member 512, first positioning member 51a, and first fitting member 512 on the second inner member 20 side, through holes 60b and 60b, which are passageways when attaching the first positioning member 51a, The first fitting locking hole 21A of the first inner member 2 and the first fitting locking hole 201A of the second inner member 20 are provided so as to face the through holes 60b and 60b, respectively.

The first positioning member 51a or the second positioning member 51b may be used as a connecting member for connecting both ends of the band to form the endless belt 51.
Further, since the first fitting member 512 and the second fitting member 511 are formed in the same shape, and the first deciding member 51a and the second deciding member 51b are also formed in the same shape, they can be used in combination. Furthermore, the number of parts is reduced, and it can be manufactured at low cost.
Furthermore, since the left and right belt guide members 513, 513 are formed to face each other and have the same shape, they can be used in common, and the number of parts can be further reduced, and the manufacturing cost can be reduced.

Second fitting locking according to the length of the first outer member 1, the length and sliding range of the first inner member 2, and the corresponding length of the first ball retainer 3 (length of the endless belt 51) A hole 11A, a first fitting locking hole 21A, a second positioning member 51b, a first positioning member 51a at a predetermined position, a first outer member 1, a first ball retainer 3 around which an endless belt 51 is stretched, The first inner member 2 is assembled as follows.
In the embodiment, the first positioning member 51a and the second positioning member 51b provided on the endless belt 51 have a sliding direction of the first ball retainer 3 when the endless belt 51 is stretched over the first ball retainer 3. The second fitting locking hole 11A and the first fitting locking hole 21A, which are provided in the central portion of the substrate 31 so as to face the upper and lower surfaces of the substrate 31, are provided with the first outer member 1 and the first inner member. It is provided at the center of the member 2 in the sliding direction.

From the side where the stopper 14 of one side of the first outer member 1 is not formed, the first endless belt 51 is laid across in a state where the first positioning member 51a and the second positioning member 51b are positioned at the central portion in the sliding direction. The ball retainer 3 is inserted and positioned at the end where the stopper 14 is not formed.
Then, the first inner member 2 of the inner member body 6 is similarly inserted into the first outer member 1 from the side where the stopper 14 is not formed, and the first fitting (facing from the through hole 60b of the inner member body 6) is fitted. The first inner member 2 is slid to a position where the first positioning member 51a faces the locking hole 21A. In the embodiment, the first inner member 2 is held by the balls 3A... And slides along with the first ball retainer 3, and the central portions of the first outer member 1 and the first ball retainer 3 in the sliding direction are respectively. Will be located in.

Next, the first positioning member 51a is pulled out from the first fitting locking hole 21A together with the endless belt 51 (the state shown in FIG. 8), and the first fitting member 512 is moved to the first positioning member 51a and the first inner member 2. And the first positioning member 51a is fitted and held in the holding hole 512d (511d), and the first fitting member 512 is placed in the first fitting locking hole 21A, and the front, rear, left, and right mounting projections are provided. When pushed down until 512a (511a)... Abuts on the first mounting portion 21d... Of the first fitting locking hole 21A, the locking projections 512e (511e), 512e (511e) move to the first position. The first fitting member 512 is fitted and locked in the first fitting locking hole 21A with the first positioning member 51a held in the holding hole 511d. Then, the endless belt 51 and the first inner member 2 are connected.

Next, the endless belt 51 and the first outer member 1 are connected, but in this state, in the case of the embodiment, the second positioning member 51b faces the second fitting locking hole 11A of the first outer member 1. Since the dimensional relationship of automatically positioning is set, as shown in FIG. 7, in a state where the second fitting member 511 is held by the second positioning member 51b in the same manner as the first fitting member 512 described above. , The second fitting locking hole 11A is fitted and locked, and the stopper 14 is finally raised to prevent the first inner member 2 and the first ball retainer 3 from coming off the first outer rail 1.

As described above, the first outer member 1 and the first inner member 2 are connected to each other by facing the endless belt 51 stretched over the first ball retainer 3 with the rotating shaft interposed therebetween. When sliding with respect to the member 2, the endless belt 51 is pulled by the first outer member 1 in the sliding direction at the second positioning member 51b.
When the endless belt 51 is pulled in the sliding direction, the endless belt 51 moves and rotates like a belt conveyor between the front and rear guide walls 513c and 513c of the first ball retainer 3. When the endless belt 51 is transported and rotated, the endless belt 51 is also connected to the first inner member 2, so that the endless belt 51 also slides the first ball retainer 3 in the same direction as the first outer member 1.
At this time, the endless belt 51 is conveyed and rotationally moved between the front and rear guide walls 513c, 513c of the first ball retainer 3 like a belt conveyor, and at the position where the endless belt 51 faces the first outer member 1 with the rotating shaft interposed therebetween. Since the first ball retainer 3 is connected to the first inner member 2, the sliding amount of the first ball retainer 3 is half the sliding amount of the first outer member 1.
Similarly, when the first inner member 2 is slid, the first ball retainer 3 also slides the first inner member 2 by half the sliding amount.

In this way, the first outer member 1 and the first inner member 2 are connected so as to face each other with the rotation axis sandwiched between the endless belts 51 laid over the first ball retainer 3 so as to be transported and rotated, and the first outer member 1 or The first interlocking device 5 is configured to slide the first ball retainer 3 according to the sliding movement of the first inner member 2.
By the first interlocking device 5, the first ball retainer 3 slides following the sliding of the first outer member 1 or the first inner member 2. There is no displacement of the slide rail due to the change of sliding force to the extension side or the contraction side.

Then, the second outer member 10, the second inner member 20, and the second ball retainer 30 are also assembled in the same manner, and the endless belt 51 is hung on the second ball retainer 30 between the front and rear guide walls 513c, 513c so as to be capable of being conveyed and rotated. The second outer member 10 and the second inner member 20 are connected to each other while being opposed to the endless belt 51 with the rotating shaft interposed therebetween, and the second ball retainer is fitted in accordance with the sliding of the second outer member 10 or the second inner member 20. The configuration in which 30 is slid becomes the second interlocking device 50.
The second interlocking device 50 causes the second ball retainer 30 to follow and slide in accordance with the sliding of the second outer member 10 or the second inner member 20, so that the second ball retainer 30 is set to the initial setting position. It is similar to the first interlocking device 5 that there is no positional deviation that accompanies a change in the sliding force of the slide rail toward the extension side or the contraction side.

In this state, the first outer member 1 and the second outer member 10 of the double slide rail 100 can slide in opposite directions from the most contracted state of the double slide rail 100 of FIG.

For example, when the first outer member 1 is fixed and the second outer member 10 is pulled out (sliding), the inner member body 6 (second inner member 20) causes the second outer member 10 to move by the second interlocking device 50. The second ball retainer 30 is pulled out while sliding.
When the sliding is continued as it is, the stopper 104 at the opposite side (contraction side) to the sliding side of the second outer member 10 comes into contact with the opposite side (contraction side) to the sliding side of the second inner member 20. The movement of the second outer member 10 with respect to the inner member body 6 is stopped.
When the sliding continues further, the second outer member 10 pushes the second inner member 20 toward the drawer side, so that the inner member body 6 (the first inner member 2) moves from the first outer member 1 to the first interlocking member. The device 5 slides the first ball retainer 3 and pulls it out.
Next, the sliding side end of the first inner member 2 contacts the sliding side (drawing side) stopper 14 of the first outer member 1, and the double slide rail 100 is in the maximum extension state.

Even in the process in which the double slide rail 100 is in the maximum extension state to the maximum contraction state, the second ball retainer 30 follows the sliding movement of the second outer member 10 by the second interlocking device 50, and the first inner member 2 moves. The first ball retainer 3 slides following the sliding of the first interlocking device 5.
Therefore, even if the double slide rail 100 is used so as to extend and contract in the vertical direction, the first ball retainer 3 seems to be suspended by the second outer member 10 via the endless belt 51, and the second ball retainer 3 is suspended. The retainer 30 seems to be suspended by the first inner member 2 via the endless belt 51, and does not lower due to its own weight.
In this way, the double slide rail 100 is made to follow the movement of the ball retainer by the first interlocking device 5 and the second interlocking device 50, so that it is not necessary to correct the position of the ball retainer, and thus stable sliding is possible. Becomes

In the above embodiment, the ball retainer and the outer member are interlocked with each other to achieve stable sliding of the ball retainer, but since there is no interlocking action between the second outer member 10 and the first inner member 2, The second outer member 10 and the first inner member 2 may have different sliding timings depending on the conditions of load and sliding speed.
Therefore, by providing the third interlocking device 7, the second outer member 10 and the first inner member 2 can be interlocked with each other to slide the double slide rail 100 in the process from the maximum extended state to the most contracted state. It is possible to make the sliding timing of each member the same every time.

Therefore, the third interlocking device 7 will be described.
The third interlocking device 7 is provided in the inner member body 6 and interlocking base materials 71 and 71 fixed to the first outer member 1 and the second outer member 10 on the side opposite to the inner member side of the substrates 11 and 101. A guide member 73, a first interlocking string 74 connecting the first outer member 1 and the second outer member 10, a second interlocking string 75, and a fixing member 72 for connecting the respective interlocking strings to the interlocking base materials 71, 71.・・ Composed of

Since the guide members 73, 73 are arranged so that the same-shaped members face each other in the sliding direction, only the extension-side guide member 73 will be described.
The guide member 73 (see FIG. 10) includes a connecting and fixing portion 73a in which fitting grooves 73b and 73b are formed in the fixed notch 60a of the inner member connecting member 60 of the inner member body 6 in the sliding direction of the front and rear end surfaces. A guide body 73c, which is located in front of the connecting and fixing portion 73a by a predetermined dimension and also has front-side front and rear fitting grooves 73d and 73d which are also fitted in the fixed cutout 60a, is formed in the sliding direction of the front and rear end surfaces, and from the front end surface of the guide body 73c. The guide grooves 73e, 73e are formed in a concave shape in the rear direction and are arranged in parallel in the vertical direction, and the bottom surfaces of the recesses of the guide grooves 73e, 73e, that is, the front end surface side, are formed and are continuous to the rear end surface of the guide body 73c. Synthetic resin material includes sliding surfaces 73f and 73f that form concave grooves, and a substantially U-shaped elastically deformable elastic imparting portion 73g that is continuously provided between the connecting and fixing portion 73a and the guide body 73c and that expands and contracts in the sliding direction. More integrally formed and configured.

The fixing members 72... are only arranged with the same shape members facing each other in the sliding direction on each of the interlocking base materials 71, 71, so only the extension-side fixing member 72 will be described. The left-right direction in FIG. 11 will be described as the left-right direction in this description.
The fixing member 72 (see FIG. 9) includes a rectangular base 72a that is long in the front-rear direction, first locking pieces 72b and 72b that extend to the left from the upper and lower ends of the base 72a, and the front-rear center of the base 72a. The insertion portion 72c penetrating in the left-right direction, the hooking portion 72d formed on the rear side of the insertion portion 72c of the base body 72a, the fixed base portion 72e formed on the front side of the insertion portion 72c of the base body 72a, and the fixed base portion 72e. An engaging leg 72f protruding leftward from the left side surface and a second locking piece 72g extending in the up-down direction at the left protruding end of the engaging leg 72f are integrally formed of a synthetic resin material. ..

Since the first interlocking cord 74 and the second interlocking cord 75 are wide belts having the same shape member, only the first interlocking cord 74 will be described.
The one end of the first interlocking string 74 is passed from the rear side of the fixing member 72 through the insertion part 72c and then folded back, and is overlapped with the first interlocking string 74 which does not pass through the insertion part 72c at the bent end. Heat is applied at the combined parts to weld the belt.
By doing so, the ring-shaped portion 74a is formed at the end of the first interlocking string 74, the hooking portion 72d of the fixing member 72 is inserted into the ring-shaped part 74a, and the fixing member 72 is attached to the end of the first interlocking string 74. It is attached. The fixing member 72 is similarly attached to the other end.
In the present embodiment, the first interlocking cord 74 and the second interlocking cord 75 are made of the same material as the endless belt 51 and have a wide cord shape, but like the endless belt 51, a thin cord or Wire rope may be used. In this case, the ring-shaped portion 74a is formed not by welding but by a method such as adhesion or fixing with a metal fitting, that is, a fixing method suitable for the material used.

The third interlocking device 7 having each member thus configured is assembled as follows.
First, the inner member connecting member 60 is slid forward and backward so that the base member of the inner member connecting member 60 above and below the fixed notch 60a is inserted into the fixed cutout 60a on one side of the guide member 73. Fit in. Further, the base material of the inner member connecting member 60 above and below the fixed notch 60a is slid and fitted in the guide groove 73e of the guide member 73 in the front-rear direction. Then, the guide member 73 is similarly fitted into the fixed notch 60a on the other side.

Next, the engaging leg 72f of the fixing member 72 attached to the one end side of the second interlocking string 75 is attached to the front side of the interlocking base material 71 on the second outer rail 10 side on the second outer rail 10 side. The fixing groove 711c is fitted rearward from the front end side.
Then, the other end side of the second interlocking cord 75 is pulled backward, and a predetermined position between both end portions of the second interlocking cord 75 is located on the lower side of the rear guide member 73 attached to the inner member connecting member 60. Hook into the guide groove 73e.
Next, the second interlocking cord 75 is folded back toward the first inner member 2 side along the sliding surface 73f, the other end side of the second interlocking cord 75 is pulled forward, and the fixing member 72 attached to the other end of the second interlocking cord 75 is pulled forward. The engaging leg 72f is fitted in the first outer rail 1 side surface of the first outer rail 1 side interlocking base 71 from the front end side of the front side fixing groove 711c toward the rear side, and the second interlocking cord 75 is Set.

The guide member 73 is provided with a second recess in the facing surface on the bulging side of the cut-and-raised piece 711b of the mounting portion 711 when the limb 72f is inserted into the fixing groove 711c of the mounting portion 711 of the interlocking base member 71. The locking pieces 72g are engaged with each other, and the projecting end surfaces of the first locking pieces 72b, 72b are formed so as to come into contact with the interlocking base material 71, and the locking pieces 72g and the first locking pieces 72b, 72b are arranged between them. The cut-and-raised pieces 711b are sandwiched so that the guide member 73 does not easily come off.

At this time, the second interlocking cord 75 is fitted while being pulled forward, but the guide body 73c of the guide member 73 is connected to the connecting and fixing portion 73a by the elasticity imparting portion 73g. When 75 is pulled forward, the guide body 73c slides forward while crushing the elasticity imparting portion 73g. The fixing member 72 is fitted into the interlocking base material 71 on the second outer rail 10 side by using this slide movement amount, and when fitted, the guide body 73c slides back to the original position by the elastic force of the elasticity imparting portion 73g. ..
In this way, the second interlocking cord 75 is appropriately stretched by the elasticity imparting portion 73g to maintain a predetermined tension state so that the second interlocking cord 75 does not come off from the guide groove 73e. Since the elasticity imparting portion 73g is integrally formed of a synthetic resin material, the number of parts is small, and it is possible to reduce the cost of parts and the number of assembling steps.

Next, the first interlocking string 74 is attached, but the first interlocking string 74 is also similar to the second interlocking string 75 in the front-back symmetry but the same procedure.
First, the engaging leg 72f of the fixing member 72 attached to one end side of the first interlocking string 74 is attached to the rear side of the interlocking base material 71 on the first outer rail 1 side on the first outer rail 1 side. The fixing groove 711c is fitted from the rear end side toward the front.
Then, the other end side of the first interlocking cord 74 is pulled forward, and a predetermined position between both ends of the first interlocking cord 74 is located on the upper side of the rear guide member 73 attached to the inner member connecting member 60. Hook into the guide groove 73e.
Next, the first interlocking cord 74 is folded back toward the second inner member 20 side along the sliding surface 73f, the other end side of the first interlocking cord 74 is pulled rearward, and the fixing member 72 attached to the other end. The engaging leg 72f is fitted to the front side from the rear end side of the front side fixing groove 711c on the surface of the interlocking base material 71 on the second outer rail 10 side on the second outer rail 10 side, and the first interlocking string 74 is Set.

It is necessary to change the height in the up-down direction so that the first interlocking string 74 and the second interlocking string 75 do not cross each other and interfere with each other's movement. Therefore, the guide grooves 73e of the guide member 73 are arranged vertically in parallel, and the first interlocking cord 74 and the second interlocking cord 75 are hooked in the guide grooves 73e having different heights in the height direction.
In this way, by arranging the guide grooves 73e in the guide member 73 in the vertical direction, the guide member 73 can be used as the front and rear sides, so that the number of types of parts can be reduced.

Further, the insertion portion 72c and the hanging portion 72d of the fixing member 72 are also set to have a size in the height direction larger than the height width of the belt of the first interlocking cord 74 (second interlocking cord 75). Since the movement in the height direction at the end of the (second interlocking cord 75) is allowed, when the distance between the guide member 73 and the fixing member 72 is reduced by the sliding of the double slide rail, the first interlocking cord is moved. The end portion of 74 (the second interlocking cord 75) moves up and down by the hooking portion 72d and follows the height of the guide groove 73e of the fixing member 72 on which the interlocking cord is hooked. Therefore, it is possible to prevent the first interlocking string 74 and the second interlocking string 75 from intersecting each other.

As described above, the third interlocking device 7 is assembled.
The double slide rail 100 equipped with the third interlocking device 7 has interlocking the inner member body 6 with the expansion and contraction of the double slide rail in addition to the interlocking of the ball retainer by the above-mentioned first interlocking device and the second interlocking device. Is possible.

For example, when the first outer member 1 is the fixed side and the second outer member 10 is the moving side, when the second outer member 10 is extended, the second outer member 10 side of the second interlocking string 75 is pulled to the extended side. ..
Since the first outer member 1 side of the second interlocking cord 75 does not move, the second interlocking cord 75 moves in the extension direction while pushing the guide member 73 on the rear side of the inner member body 6 forward. As a matter of course, since the rear guide member 73 is pushed forward (extension direction), the inner member body 6 also moves forward (extension direction). At this time, the sliding amount of the inner member body 6 is half the sliding amount of the second outer member 10 as in the ball retainer to which the interlocking device is mounted.

Simultaneously with the above process, when the inner member body 6 moves forward (in the extending direction) by the action of the second interlocking cord 75, the first outer member 1 side of the first interlocking cord 74 does not move. A force is pulled by the first interlocking cord 74 toward the rear side of the first outer member 1 on the guide member 73 on the front side of the inner member body 6 in the middle portion of 74.
Due to this action, the inner member body 6 does not overshoot the movement of the second outer member 10.

In this way, the force of pushing the inner member body 6 forward by the action of the second interlocking cord 75 and the force of pulling the inner member body 6 rearward by the first interlocking cord 74 simultaneously act, so that the first interlocking cord Since tension can always be applied to 74 and the second interlocking cord 75, the first interlocking cord 74 and the second interlocking cord 75 will not come off from the guide member 73.

Then, when the second outer member 10 continues to extend, the second outer member 10 extends with respect to the inner member body 6 (second inner member 20), and the inner member body 6 is fixed to the first outer member 1 on the fixed side. On the other hand, the second outer member 10 is expanded by half of the expansion amount.
As a matter of course, due to the interaction between the first interlocking string 74 and the second interlocking string 75, the second side on the moving side with respect to the inner member body 6 (the second inner member 20) not only when the double slide rail 100 extends but also when the double slide rail 100 contracts. The inner member body 6 moves to the contraction side by half of the amount of movement of the outer member 10 on the contraction side.

As described above, the third interlocking device 7 interlocks with the movement of the outer member so that the inner member follows and moves, so that the double slide rail 100 moves the outer members of the first interlocking device and the second interlocking device. A stable sliding force can be realized by combining with the action of moving the ball retainer in a linked manner.
Especially when the double slide rail 100 is used in the vertical direction, the inner member and the ball retainer do not lower by their own weight.
Therefore, the double slide rail 100 by the first interlocking device 5, the second interlocking device 50, and the third interlocking device 7 causes the inner member and the ball retainer to follow the movement of the outer member, so that stable sliding is achieved. Is possible.

In some cases, the third interlocking device 7 can be made up of only one interlocking string.
For example, when the double slide rail is extended upward, the ball retainer always applies a downward force due to its own weight, but only the ball retainer is not lowered by the first interlocking device and the second interlocking device.
However, when the third interlocking device 7 is not provided, the inner member body 6 always lowers due to its own weight. Therefore, when the moving outer member (second outer member 10) is extended, the inner member body 6 is pulled up and extended, and when the moving outer member (second outer member 10) is contracted, the inner member is pulled. Since the body 6 is lowered by its own weight, the inner member member is completely contracted first, and then the moving outer member (second outer member 10) is contracted with respect to the inner member member.
Therefore, it is not possible to stabilize the sliding force in the entire extension and contraction process of the double slide rail.

Therefore, only the second interlocking cord 75 is set, that is, one end of the second interlocking cord is fixed to the extension end of the moving outer member (second outer member 10) and the rear side of the inner member connecting member 60 ( The double slide rail in a state where the middle part of the second interlocking cord is hooked on the (lower side) guide member 73 and the other end of the second interlocking cord is fixed to the extension end of the fixed outer member (first outer member 1). When 100 is extended upward, the inner member body 6 is extended upward by one half of the extension amount of the moving outer member by the action of the second interlocking string 75.
At this time, a downward force is applied to the second interlocking cord 75 via the guide member 73 due to the own weight of the inner member body 6, so that the second interlocking cord 75 is always tensioned, and the same action as the first interlocking cord 74 is exerted. Will work.
Therefore, when the double slide rail is extended upward (when the weight of the inner member body 6 can be used), the interlocking string on one side that lifts the inner member body 6 toward the extension side can be used.
As described above, the third interlocking device 7 can be configured by the interlocking string on only one side depending on the application.

In the details of the present invention described above, the first outer member 1 is the fixed side and the second outer member 10 is the moving side, but the second outer member 10 is the fixed side and the first outer member 1 is the moving side. Can also
Further, the inner member body 6 can be used as a fixed side so that the first outer member 1 and the second outer member 10 face each other and extend apart.
In this case, by equipping the third interlocking device 7, when the outer member on the one side is extended, the outer member on the other side can be extended by the same movement amount in conjunction with each other.

1 1st outer member 100 Double slide rail 11A 2nd fitting locking hole 10 2nd outer member 101A 2nd fitting locking hole 2 1st inner member 21A 1st fitting locking hole 21b Through hole 20 2nd inner Member 201A First fitting locking hole 3 First ball retainer 34 Notch for mounting guide member 30 Second ball retainer 5 First interlocking device 50 Second interlocking device 51 Endless belt 51a First positioning member 51b Second positioning member 511 Second fitting member 512 First fitting member 513 Belt guide member 6 Inner member body 60 Inner member connecting member 60a Fixed notch 601 Connecting body 7 Third interlocking device 71 Interlocking base material 711 Mounting portion 72 Fixing member 72c Inserting portion 72d Hanging part 73 Guide member 73e Guide groove 73f Sliding surface 73g Elasticity imparting part 74 First interlocking string 75 Second interlocking string

Claims (4)

A first outer member, a second outer member, a first inner member slidably held by a ball on the first outer member, and a second inner member slidably held by a ball on a second outer member. A first ball retainer that rotatably holds the balls on the first outer member side; and a second ball retainer that rotatably holds the balls on the second outer member side. (2) In a double slide rail that extends the slide rail in two steps by integrally forming the inner member, the first ball retainer follows the sliding movement of the first inner member relative to the first outer member. A double slide rail comprising: an interlocking device and a second interlocking device that causes the second ball retainer to follow the sliding of the second inner member with respect to the second outer member. The first outer member, an inner member body in which the first inner member and the second inner member are integrally slidably formed, and a third interlocking device that interlocks the sliding of the second outer member. Double slide rail described in. In the third interlocking device, one end is connected to the contracting side of the first outer rail, the other end is connected to the contracting side of the second outer rail, and the first guide part is provided at the intermediate part on the extending side of the inner member body. A first interlocking cord to be hung on the first outer rail, one end of which is connected to the extension side of the first outer rail, and the other end of which is connected to the extension side of the second outer rail, and is provided at the intermediate portion on the contraction side of the inner member body. The double slide rail according to claim 2, wherein the double slide rail is configured by a second interlocking string that is hung on the second guide portion. In the first interlocking device, the first endless belt is attached across the sliding direction via the left and right belt guide members provided at both ends of the first ball retainer in the sliding direction, and the first endless belt has the first endless belt. A part of the first inner member is connected to a predetermined portion of the inner member side, and a part of the first outer member side of the first outer member is connected to a predetermined position of the first outer member. In the interlocking device, the second endless belt is attached across the sliding direction via the left and right belt guide members provided at both ends of the second ball retainer in the sliding direction, and the second inner member of the second endless belt is attached. A part of the second inner member is connected to a predetermined part of the second inner member, and a part of the second outer member of the endless belt is connected to a predetermined part of the second outer member. The double slide rail described in Item 3.

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