JP4809139B2 - Automatic locking device for slide rail - Google Patents

Description

The present invention relates to a slide rail locking device used for drawers and the like.

Conventionally, drawers using slide rails or maintenance members such as copiers have a light drawer operation, so drawers may unexpectedly pop out during transportation or tilting of the main body due to unevenness on the floor surface or vibration. .
In order to solve this, a latch device was provided between the drawer and the main body, but new members and processing such as a lever to release the latch are required not only on the drawer side but also on the main body side, which only increases the cost. The operation was troublesome.
For this reason, the lock mechanism, the release mechanism, and the push spring are all incorporated into the slide rail, and the lock can be released by gently pushing the front of the drawer, etc. It has been proposed that the drawer is automatically locked when the drawer is opened and the drawer is fully inserted. (For example, refer to Patent Document 1.)

In this case, two movable stoppers are provided corresponding to the outer rail and the inner rail, a fixed stopper is provided on the inner rail, and the push springs are individually attached to the outer rail. In addition to ensuring quality stability, the equipment is too large to be used for compact slide rails, and each component (two movable stoppers, fixed stoppers, and push springs) is used as a member. It has to be managed, and the management of the member becomes complicated. Moreover, the repair when a failure occurs requires the inspection, repair, and replacement of each member, and the entire slide rail is sometimes replaced.

JP 2005-131338 A

By reducing the number of members, the present invention facilitates member management, is easy to mount on the slide rail, and can be replaced as a single member even if a failure occurs. It is an object to provide a stopping device.

Therefore, in order to solve the above problems, the present invention is configured as the first means in that the moving side rail is brought into the locked state with respect to the fixed side rail by the operation of pushing in the storing direction, and the moving side is further moved from the locked state. An automatic locking member that releases the locked state of the moving rail by an operation of pushing the side rail, and a movement in which the locked state is released while maintaining the locked state of the moving rail in cooperation with the automatic locking member A latch member having a push spring that pushes the side rail to a predetermined position is provided at the rear end portion of the fixed side rail, and a locking pin that is detachable from the automatic locking member of the latch member is provided at the rear end portion of the moving side rail. The automatic locking member is movable up and down within a predetermined range in accordance with the movement of the locking pin by applying a biasing force from the vertical direction by the biasing means.

Next, the present invention is configured as a second means, which includes a latch member attached to the rear end portion of the fixed side rail and a locking pin formed on the moving side rail. With the rail stored and locked in the fixed side rail, a push spring that always applies urging force in the direction to push the moving side rail out of the fixed side rail, and automatic locking that moves up and down with the movement of the locking pin The automatic locking member has a guide projection and a stopper projection positioned at a predetermined interval on the storage side of the guide projection, and the guide projection is inclined upward from the drawer side to the storage side. Formed between a push-down guide surface, a push-up guide surface that slopes upward from the pull-out side end of the push-down guide surface toward the storage side at a gentler angle than the push-down guide surface, and a storage-side end portion of the push-down guide surface and the push-up guide surface Tugging The stopper recess protrudes in the direction of the drawer with a predetermined interval on the storage side of the locking recess, and the guide is inclined downward on the upper surface. A biasing force is applied to the self-locking member from above and below, and the tip of the pull-down guide surface on the pull-out side is below the passing line of the locking pin. The end of the push-up guide surface on the storage side is located above the locking pin passage line, the locking pin is locked by the locking recess, and the moving rail is In the locked state, the end of the guide stopper surface on the drawer side is located above the locking pin.

Next, the third means of the present invention comprises a latch member attached to the rear end portion of the fixed side rail, and a locking pin formed on the moving side rail. With the rail stored and locked in the fixed side rail, a push spring that always applies urging force in the direction to push the moving side rail out of the fixed side rail, and automatic locking that moves up and down with the movement of the locking pin The automatic locking member has a guide projection and a stopper projection positioned at a predetermined interval on the storage side of the guide projection, and the guide projection is inclined upward from the drawer side to the storage side. Formed between a push-down guide surface, a push-up guide surface that slopes upward from the pull-out side end of the push-down guide surface toward the storage side at a gentler angle than the push-down guide surface, and a storage-side end portion of the push-down guide surface and the push-up guide surface Tugging The stopper projection is extended to the guide stopper surface and the lower surface with a predetermined interval on the storage side of the locking recess and the drawer side inclined downward. It consists of a central guide projection that protrudes in the drawer side direction with an extruded guide inclined surface that is inclined upward, and an upper stopper portion and a lower stopper portion that are connected to the upper and lower sides of the central guide projection. A biasing force is applied to the locking member from above and below, and with this biasing force suspended, the tip of the pull-down guide surface on the drawer side is positioned below the passing line of the locking pin, and the lifting member is pushed up. The storage-side end of the guide surface is located above the locking pin passage line, the upper stopper is located above the storage-side end of the push-down guide surface, and the lower stopper is the storage-side end of the push-up guide surface Located below the Is locked to the locking recess and the moving side rail is locked with respect to the fixed side rail, the guide stopper surface and the end of the pushing guide inclined surface on the drawer side are located above the locking pin, An automatic locking device for a slide rail, wherein the lower stopper portion is positioned on a passing line of the locking pin in a state where the urging force is suspended from the vertical direction of the automatic locking member.

According to the first aspect of the present invention, a latch member that incorporates an automatic locking member and a push spring as a single member is provided at the rear end portion of the fixed rail, and the automatic locking member is detachable. Since the pin is only provided on the moving rail, the number of members is small, so it is easy to manage the members, and the mounting of the members to the fixed and moving rails is not time-consuming. However, since it is only necessary to inspect and replace one member as a latch member, the repair is easy and can be easily performed on site.
In addition, the automatic locking member can be moved up and down within a predetermined range in accordance with the movement of the locking pin by applying a biasing force from the vertical direction by the biasing means. Since it is only necessary to secure a corresponding vertical movement space, the whole can be made compact.
Furthermore, since the locking pin is engaged and disengaged by the vertical movement of the automatic locking member, the moving distance in the sliding direction for engagement and disengagement can be reduced, and when the sliding operation of the moving rail is completed (the locking pin is locked) Time), and the ease of use and operability are improved.

According to invention of Claim 2, in addition to the said effect, the automatic latching member is provided with the urging | biasing force from the up-down direction, In this state where this urging | biasing force was suspended, the front-end | tip of the pull-down guide surface at the drawer side Is located on the lower side on the passing line of the locking pin, the end on the storage side of the push-up guide surface is located on the upper side on the passing line of the locking pin, the locking pin is locked in the locking recess, With the movement side rail locked to the fixed side rail, the drawer side end of the guide stopper surface is located above the locking pin. The automatic locking member can move up and down reliably, and the locking pin can be securely engaged and disengaged.

According to the invention described in claim 3, in addition to the above effect, the upper stopper portion is located above the storage side end portion of the push-down guide surface, so that even if the drawer or the like is stored suddenly, the locking pin is Since the stopper pin is reliably brought into contact with the upper stopper portion and stopped, the locking pin is reliably locked in the locking recess.
The stopper projection has a push guide inclined surface on the lower surface where the drawer side is inclined upward, and the lower stopper portion is located below the push guide inclined surface and below the storage side end of the push-up guide surface. Furthermore, since the urging force is suspended from the vertical direction of the automatic locking member and is located on the passing line of the locking pin, the moving side moving side is locked to the fixed side rail. When the moving side rail is pushed in again, the locking pin surely comes into contact with the drawer side of the lower stopper portion, so that the moving side rail does not move back more than necessary.

It consists of a latch member attached to the rear end of the fixed rail and a locking pin formed on the moving rail. The latch member is always in a state where the moving rail is housed and locked in the fixed rail. A pressing spring that applies a biasing force in the direction of pushing the moving side rail from the fixed side rail, and an automatic locking member that moves up and down with the movement of the locking pin, the automatic locking member includes a guide protrusion, The guide protrusion has a stopper protrusion positioned at a predetermined interval on the storage side of the guide protrusion, and the guide protrusion includes a push-down guide surface inclined upward from the drawer side to the storage side, and a push-down guide from the drawer-side end of the push-down guide surface. It consists of a push-up guide surface that slopes upward toward the storage side at a gentle angle from the surface, and a substantially concave heart shape that is formed on the drawer side formed between the push-down guide surface and the storage-side end of the push-up guide surface. The The stopper protrusion has a guide stopper surface that has a predetermined interval on the storage side of the locking recess and has an upper surface on which the drawer side is inclined downward, and a push guide inclined surface on which the drawer side is inclined upward on the lower surface. A central guide protrusion protruding in the upper part, and an upper stopper part and a lower stopper part connected to the upper and lower parts of the central guide protrusion. With this urging force suspended, the leading end of the push-down guide surface is positioned on the lower side of the locking pin passage line, and the storage side end of the push-up guide surface is the upper side of the locking pin passage line. The upper stopper is located above the storage-side end of the push-down guide surface, the lower stopper is located below the storage-side end of the push-up guide surface, and the locking pin is locked in the locking recess Moved to the fixed rail. With the side rail locked, the end of the pull-out side of the guide stopper surface and the push-out guide inclined surface is located above the locking pin, and the urging force is suspended from the vertical direction of the automatic locking member. The lower stopper portion is located on the passing line of the locking pin.

The first embodiment will be described below with reference to the drawings.
1 and 2, reference numeral 100 denotes a slide rail. The slide rail 100 is slid through a fixed rail 1 and balls 44... Held on the fixed rail 1 rotatably by a ball retainer 4. The movable rail 3 is slidably held via the intermediate rail 2 and the balls 54... Which are rotatably held by the ball retainer 5 on the intermediate rail 2. A latch member 60 is attached to the inner surface of the rear end portion, and a locking pin 9 is attached to the rear end portion of the moving rail corresponding to the latch member 60.
Hereinafter, the lower left direction in FIG. 1 will be described as the drawer side and the upper right direction as the storage side.

That is, the fixed-side rail 1 is formed in a channel shape from the base plate 10 and the upper and lower bent edges 11, 11, and a plurality of balls 44 · located between the inner surfaces of the upper and lower bent edges 11, 11 and the outer surface of the intermediate rail 2. The intermediate rail 2 is slidably held via The plurality of balls 44 are rotatably held by a substantially C-shaped ball retainer 4 that is approximately half the length of the fixed-side rail 1.
A stopper (not shown) for storing the intermediate rail 2 is formed at the rear end portion of the substrate 10 of the fixed rail 1, and the ball retainer 4 is moved in the drawing direction at the front end portion of the substrate 10. A retainer pre-retainer stopper (not shown) for limiting the range is formed.

The intermediate rail 2 is substantially the same length as the fixed side rail 1 and is formed in a substantially channel shape in the same direction as the fixed side rail 1 from the base plate 20 and the upper and lower bent edges 21 and 21, and the outer surface of the upper and lower bent edges 21 and 21. The ball 44... Has an outer side ball sliding groove on which the balls 44... Roll in the sliding direction, and the balls 54. Has a ball sliding groove for rolling.
The rear end of the board 20 abuts against the rear end of the ball retainer 4 whose front end abuts against a retainer front stopper (not shown) of the stationary rail 1 when the intermediate rail 2 is pulled out to the maximum. Thus, a retainer post-retainer (not shown) that restricts the maximum pull-out amount of the intermediate rail 2 is formed. A ball retainer front end stopper (not shown) with which the portion abuts is formed.

The moving side rail 3 is formed to be approximately the same length as the fixed side rail 1 and is slidable through balls 54... Held by the ball retainer 5. It is formed in a substantially C-shaped cross section from the upper and lower bent edges 31, 31 having the sliding surfaces of the balls 54...

Then, the storage side end of the substrate 30 accommodates the ball retainer 5 in which the drawer side end abuts against a ball retainer front end stopper (not shown) of the intermediate rail 2 when the movable rail 3 is pulled out to the maximum. A ball retainer rear end stopper (not shown) is formed in contact with the side end portion and restricts the maximum pull-out amount of the moving side rail 3.

The ball retainer 4 is a strip-shaped metal plate that is approximately half the length of the fixed rail 1 and has a U-shaped substrate 40 of a size that can be inserted between the fixed rail 1 and the intermediate rails 10 and 20. It protrudes in an L shape from both ends of the letter-shaped substrate 40, and is formed in a substantially U-shaped cross section from the upper and lower protruding edges 41, 41 located between the upper and lower bent edges 11, 11, 21, 21 of the fixed side rail 1 and the intermediate rail 2. The plurality of balls 44 are rotatably held in the sliding direction of the upper and lower protruding edges 41, 41.
The ball retainer 5 is a strip-shaped metal plate that is about half the length of the intermediate rail 2, and has a U-shaped substrate 50 sized to be inserted between the intermediate rail 2 and the substrates 20, 30 of the moving-side rail 3. It protrudes in an L shape from both ends of the substrate 50, and is formed in a substantially U-shaped cross section from upper and lower protruding edges 51, 51 positioned between the upper and lower bent edges 21, 21, 31, 31 of the intermediate member 2 and the moving rail 3. A plurality of balls 54... Are rotatably held in the sliding direction of the upper and lower protruding edges 51, 51.

The slide rail 100 is configured as described above, and sliding in the drawer side direction of the intermediate rail 2 with respect to the fixed rail 1 and sliding in the drawer side direction of the moving rail 3 with respect to the intermediate rail 2 are as follows. .
When the intermediate rail 2 slides to the drawer side with respect to the fixed side rail 1, the ball retainer 4 also moves to the drawer side with a movement amount that is half of the movement amount of the intermediate rail 2, and eventually the drawer side end of the ball retainer 4 is moved. The portion comes into contact with a stopper (not shown) before the retainer of the fixed rail 1 and stops, and at the same time, a stopper (not shown) after the retainer of the intermediate rail 2 hits the stopper before retainer (not shown). The ball retainer 4 comes into contact with the storage side end and stops.

On the other hand, when the moving rail 3 slides to the drawer side with respect to the intermediate rail 2, the ball retainer 5 also moves to the drawer side with a movement amount that is half the movement amount of the moving rail 3, and eventually the front end of the ball retainer 5 is moved. The ball retainer front end stopper of the intermediate rail 2 comes into contact with the stopper and stops, and the ball retainer rear end stopper of the moving rail 3 comes into contact with the storage side end of the stopped ball retainer 5 so that the moving rail 3 stops.

On the other hand, sliding in the storage side direction of the intermediate rail 2 with respect to the fixed side rail 1 and sliding in the storage side direction of the moving side rail 3 with respect to the intermediate member 2 are as follows. When the intermediate rail 2 slides to the storage side with respect to the fixed rail 1, the ball retainer 4 also moves to the storage side with a movement amount that is half the movement amount of the intermediate rail 2, and eventually the stopper after the retainer of the intermediate rail 2 ( (Not shown) abuts against a stopper (not shown) when the stationary rail 1 is stored, and the sliding of the intermediate rail 2 stops.

On the other hand, when the moving rail 3 slides toward the storage side with respect to the intermediate rail 2, the ball retainer 5 also moves to the storage side with a movement amount that is half of the movement amount of the moving rail 3. The retainer rear end stopper comes into contact with the stopper when the stationary rail 1 is stored, and the moving rail 3 stops. Then, the moving side rail 3 is slightly pushed back by the latch member 60, the locking pin 9 is locked to the latch member 60, and the storage state of the moving side rail 3 is maintained.

A latch member 60 (shown in FIGS. 3 to 6) holds the push spring 7, the automatic locking member 8, and the push spring 7 and the automatic locking member 8, and is attached to the storage side end of the fixed rail 1. The holding member 6 is used.
The holding member 6 includes a mounting substrate 61 positioned on the inner surface of the substrate 10 of the fixed rail 1 and an upper fitting column that is connected to the upper and lower ends of the mounting substrate 61 and fits to the inner surface of the upper bent edge 11. 62, a lower fitting column 63, an engagement protrusion 64 that protrudes toward the substrate 10 side of the fixed rail 1 at the storage side end of the mounting substrate 61, and engages with the engagement hole 101 of the fixed rail 1, and the mounting substrate An insertion hole 65 of a predetermined size that is formed on the drawer side of 61 and allows the automatic locking member 8 to move up and down, and an upper support that protrudes in the vertical direction from the storage side of the insertion hole 65 and the upper and lower ends of the drawer side Projection column 651, lower support projection column 652, and on the substrate 61 side of the fixed-side rail 1, the drawer side guide support recess 611 and the storage side of the automatic locking member 8 connected to the drawer side and the storage side of the insertion hole 65 Guide support recess 612 and a push spring mounting portion located below the upper fitting column 62 6 and an upward arcuate bent edge insertion groove 67, which is connected to the pulling side of the push spring mounting portion 66 and through which the upper and lower bent edges 31 of the moving rail 3 are inserted, is formed by integral molding of a synthetic resin material. It is configured.
Reference numeral 661 denotes a push spring mounting opening for mounting the push spring 7 in the push spring mounting portion 66.

The push spring 7 has a fitting cap 71 made of a synthetic resin material attached to the drawer side end, and the drawer side end surface of the fitting cap 71 abuts on the drawer side end surface of the push spring mounting portion 66 and has a predetermined elasticity. The holding side end surface of the upper bent edge 31 of the movable rail 3 that has been held in the push spring mounting portion 66 and has passed through the bent edge insertion groove 67 is the drawer side end surface of the fitting cap 71. In this state, the moving side rail 3 is always urged by the pressing spring in the direction of the drawing side while the moving side rail 3 is locked.

The automatic locking member 8 includes a support substrate 81 formed in a predetermined thickness and positioned in the insertion hole 65, an inner surface of the substrate 10 of the fixed rail 1, a drawer-side guide support recess 611, and a storage-side guide support recess 612. Is supported in a vertically movable manner, protrudes to the drawer side and the storage side of the support substrate 81, and has a predetermined length in the vertical direction, a drawer side end wing piece 82, a storage side wing piece 83, and a moving side of the support substrate 81 A substantially horizontal heart-shaped guide projection 84 projecting toward the substrate 30 side of the rail 3, a guide projection, and a stopper projection 85 positioned at a predetermined interval on the storage side of the guide projection 84 are integrally formed.
The upper surface and the lower surface of the support substrate 81 are pushed up to apply an upward biasing force to the automatic locking member 8 corresponding to the positions of the upper support protrusion 651 and the lower support protrusion 652 of the insertion hole 65. Spring fitting holes 861 and 871 into which the spring 86 and the push-down spring 87 are fitted are formed.
That is, the automatic locking member 8 cannot move from the height position where the urging forces of the push-up spring 86 and the push-down spring 87 are suspended in the storage side direction and the pull-out side direction, and can move up and down in the insertion hole 65. Is retained.

The guide protrusion 84 is a push-down guide surface 841 inclined upward from the drawer side to the storage side, and a push-up guide inclined upward from the drawer side end of the push-down guide surface 841 toward the storage side at a gentler angle than the push-down guide surface 841. It is formed in a substantially horizontal heart shape from a surface 842 and a locking recess 843 that is recessed on the drawer side formed between the storage-side end portions of the push-down guide surface 841 and the push-up guide surface 842.

The stopper protrusion 85 has a predetermined interval 90 (interval through which the locking pin 9 can pass smoothly, approximately 1.25 times the diameter of the locking pin. And a guide stopper surface 851 whose upper surface is inclined downward and a push guide inclined surface 852 whose upper surface is inclined upward and a lower surface is provided with a central guide protrusion 853 projecting in the direction of the drawer. An upper stopper portion 854 and a lower stopper portion 855 are provided continuously above and below the protrusion 853. The upper stopper portion 854 is located above the storage side end of the push-down guide surface 841, and the lower stopper portion 855 is The push-up guide surface 842 is positioned below the storage side end.

The automatic locking member 8 is in a state where the urging forces of the push-up spring 86 and the push-down spring 87 are suspended (the state shown in FIG. 8), and the leading end of the push-down guide surface 841 is the center of the lock pin 9. The end portion on the storage side of the push-up guide surface 842 is positioned on the upper side of the passage line at the center of the locking pin 9. Then, in the state where the locking pin 9 is locked to the locking recess 843 and the moving side rail 3 is locked with respect to the fixed side rail 1, end portions on the drawer side of the guide stopper surface 851 and the pushing guide inclined surface 852. The (center guide protrusion 853) is located above the locking pin 9 and the lower stopper portion 855 passes through the central portion of the locking pin 9 with the urging force suspended from the vertical direction of the automatic locking member 8. It is located on the line.

Since the latch member 60 is configured as described above, when the movable rail 3 in the pulled out state moves in the storage side direction (when the locking pin 9 moves from the state shown in FIG. 8 to the storage side), The locking pin 9 contacts the push-down guide surface 841 and moves to the storage side while contracting the push spring 7 against the elasticity of the push spring 7.
That is, against the elastic force (upward biasing force) of the push-up spring 86, the automatic locking member 8 moves in the storage direction while pressing down, and eventually the locking pin 9 is moved to the storage side end of the push-down guide surface 841. Reach the department. (State shown in FIG. 9)

When the moving rail 3 is further moved to the storage side from the above state, the locking pin 9 is positioned at the upper end of the passage 90, and at the same time, the automatic locking member 8 is lifted by the urging force of the push-up spring 86, and the guide stopper The surface 851 comes into contact with the locking pin 9 and the ascending of the automatic locking member 8 stops once. (The state shown in FIG. 10)
In this state, when the sliding force in the storage side direction with respect to the moving side rail 3 is released, the moving side rail 3 is pushed back in the pull-out side direction by the elastic force of the push spring 7, but the locking pin 9 is guided to the guide stopper surface 851. When it deviates from the drawer side end, the automatic locking member 8 rises again by the urging force of the push-up spring 86, the bottom of the locking recess 843 contacts the locking pin 9, and the automatic locking member 8 stops rising. At the same time, the automatic locking member 8 is biased by the push-up spring 86 and the moving rail 3 (locking pin 9) is biased by the push spring 7 in the pull-out direction. The state in which the rail 3 (locking pin 9) is locked (locked) to the automatic locking member 8 of the latch member 60 is maintained. (The state shown in FIG. 11)

From this state, when the moving side rail 3 is pushed to the storage side, the locking pin 9 deviates from the locking recess 843 to the storage side, and at the same time, the automatic locking member 8 is raised by the urging force of the push-up spring 86, The storage-side end of the surface 842 is located on the upper side of the passing line at the center of the locking pin 9. (State shown in FIG. 12)
When the sliding force to the storage side of the moving rail 3 is released in this state, the moving rail 3 moves to the drawing side by the urging force of the push spring 7, and at the same time, the locking pin 9 urges the urging force of the depressing spring 87. The automatic locking member 8 is pushed up along the push-up guide surface 842 and reaches the end portion on the drawer side of the push-up guide surface 842 (state shown in FIG. 13). Thereafter, the moving rail 3 is further moved to the drawer side by the urging force of the push spring 7. (State shown in FIG. 8)

The perspective view of the slide rail which comprised this invention 1 is a cross-sectional view taken along line AA in FIG. The perspective view of the state which removed the latch member from the fixed side rail Exploded perspective view of latch member Perspective view of automatic locking member The main part expanded sectional view of the BB line of FIG. CC main part expanded sectional view of FIG. Explanatory drawing of the state where the locking pin is located on the drawer side of the automatic locking member Explanatory drawing of the state where the locking pin pushed down the automatic locking member most Explanatory drawing of the state where the locking pin is in contact with the guide stopper surface Explanatory drawing of the state where the locking pin is locked to the latch member Explanatory drawing which shows the state which the latching pin deviated from the latching state Explanatory drawing of the state where the locking pin pushed up the automatic locking member most

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fixed side rail 11, 11 Folding edge 100 Slide rail 2 Intermediate rail 3 Moving side rail 6 Holding member 60 Latch member 7 Pushing spring 8 Automatic locking member 84 Guide protrusion 841 Push-down guide surface 842 Push-up guide surface 843 Lock Recess 85 Stopper protrusion 851 Guide stopper surface 852 Extrusion guide inclined surface 853 Center guide protrusion 854 Upper stopper portion 855 Lower stopper portion 9 Locking pin

Claims (3)

An automatic locking member that releases the locked state of the moving side rail by an operation of pushing the moving side rail further from the locked state by making the moving side rail locked to the fixed side rail by an operation of pushing in the storage direction; A latch member having a push spring for pushing the movable rail released from the locked state to a predetermined position is linked to the automatic locking member at the rear end of the fixed rail while maintaining the locked state of the movable rail. The latch pin is provided with a latch pin which can be freely engaged with and disengaged from the latch member at the rear end portion of the moving rail, and the automatic latch member is given a biasing force by a biasing means from the vertical direction. Thus, the slide rail automatic locking device can be moved up and down within a predetermined range as the locking pin moves. It consists of a latch member attached to the rear end of the fixed rail and a locking pin formed on the moving rail. The latch member is always in a state where the moving rail is housed and locked in the fixed rail. A pressing spring that applies a biasing force in the direction of pushing the moving side rail from the fixed side rail, and an automatic locking member that moves up and down with the movement of the locking pin, the automatic locking member includes a guide protrusion, The guide protrusion has a stopper protrusion positioned at a predetermined interval on the storage side of the guide protrusion, and the guide protrusion includes a push-down guide surface inclined upward from the drawer side to the storage side, and a push-down guide from the drawer-side end of the push-down guide surface. It consists of a push-up guide surface that slopes upward toward the storage side at a gentle angle from the surface, and a substantially concave heart shape that is formed on the drawer side formed between the push-down guide surface and the storage-side end of the push-up guide surface. The The stopper protrusion has a guide stopper surface that protrudes in the drawer side direction with a predetermined interval on the storage side of the locking recess, and has a guide stopper surface that is inclined downward on the upper surface, and is attached to the automatic locking member from above and below. In this state where the urging force is suspended, the leading end of the push-down guide surface is located below the passing line of the locking pin, and the end of the push-up guide surface on the storage side is Located on the upper side of the passing line of the locking pin, the locking pin is locked in the locking recess, and the moving side rail is locked with respect to the fixed side rail. An automatic locking device for a slide rail, which is located above a locking pin. It consists of a latch member attached to the rear end of the fixed rail and a locking pin formed on the moving rail. The latch member is always in a state where the moving rail is housed and locked in the fixed rail. A pressing spring that applies a biasing force in the direction of pushing the moving side rail from the fixed side rail, and an automatic locking member that moves up and down with the movement of the locking pin, the automatic locking member includes a guide protrusion, The guide protrusion has a stopper protrusion positioned at a predetermined interval on the storage side of the guide protrusion, and the guide protrusion includes a push-down guide surface inclined upward from the drawer side to the storage side, and a push-down guide from the drawer-side end of the push-down guide surface. It consists of a push-up guide surface that slopes upward toward the storage side at a gentle angle from the surface, and a substantially concave heart shape that is formed on the drawer side formed between the push-down guide surface and the storage-side end of the push-up guide surface. The The stopper protrusion has a guide stopper surface that has a predetermined interval on the storage side of the locking recess and has an upper surface on which the drawer side is inclined downward, and a push guide inclined surface on which the drawer side is inclined upward on the lower surface. A central guide protrusion protruding in the upper part, and an upper stopper part and a lower stopper part connected to the upper and lower parts of the central guide protrusion. With this urging force suspended, the leading end of the push-down guide surface is positioned on the lower side of the locking pin passage line, and the storage side end of the push-up guide surface is the upper side of the locking pin passage line. The upper stopper is located above the storage-side end of the push-down guide surface, the lower stopper is located below the storage-side end of the push-up guide surface, and the locking pin is locked in the locking recess Moved to the fixed rail. With the side rail locked, the end of the pull-out side of the guide stopper surface and the push-out guide inclined surface is located above the locking pin, and the urging force is suspended from the vertical direction of the automatic locking member. An automatic locking device for a slide rail, wherein the lower stopper portion is located on a passing line of the locking pin.