JP5484813B2 - Automatic retractor - Google Patents

Description

  The present invention relates to an automatic pull-in device particularly used for a slide rail such as a drawer.

Conventionally, a number of such automatic retraction devices have been provided.
As shown in the prior art document as a typical example, in a three-member type slide rail automatic retracting device, a housing attached to the inner surface of the rearmost part of a stationary member (outer member) connected to a cabinet, a drawer, etc. It is comprised from the web slot which consists of the 1st part and 2nd part which are formed in the last part of the movement side member (inner member) connected with.
The housing has an elongated shape in the front and rear direction having opposing side walls, a front wall, a rear wall, and an upper wall, and a slot composed of a main vertical portion and a horizontal portion is formed in the upper wall.
Furthermore, a guide pin, a spring, and an actuator guide member are accommodated therein, and the spring and the actuator guide member rotate with respect to the rear wall together with the guide pin.
The actuator guide member is engaged with the second edge of the second portion of the web slot with the moving member stored in the stationary member.

When the moving member is pulled out, the second edge of the second portion of the web slot moves the actuator guide member forward while compressing the spring along the main longitudinal portion of the slot.
When the moving side member is pulled out to a predetermined position and the actuator guide member reaches the front end of the main longitudinal portion of the slot, the actuator guide member moves behind the guide pin along the second edge of the second portion of the web slot. It rotates together with the guide pin around the rear wall portion to which the end is attached, and moves to the lateral portion of the slot of the housing.
When the moving member is further pulled out, the actuator guide member comes out of the web slot and stays in the lateral portion of the slot with the energy of the compressed spring accumulated.

Next, when the pulled-out moving member is stored in the fixed member, the actuator guide member enters the first portion of the web slot, and when the moving member is further stored, the actuator guide member is The first edge of the two parts moves from the transverse part of the slot to the main longitudinal part.
The compressed energy of the spring is then released and the actuator guide member engages with the second edge of the second portion of the web slot to move the moving member back together and automatically retract.

That is, since the housing is attached to the inner surface of the rearmost part of the stationary member (outer member), the length of the intermediate member is limited to the length obtained by subtracting the length of the housing from the stationary member. There is a drawback that the stroke of the article to be pulled out (slide rail) becomes small.

Further, the actuator guide member rotates together with the guide pin about the rear wall of the housing as a rotation center, moves from the main vertical portion of the housing slot to the horizontal portion, and stays in a state where the compression energy of the spring is accumulated. Therefore, in order to reliably maintain the accumulation of the compression energy of the spring, it is necessary to increase the lateral movement distance of the actuator guide member and increase the engagement area between the actuator guide member and the lateral portion of the slot. .
However, the lateral movement of the actuator guide member is performed by the rotation of the guide pin with the rear wall of the housing as the rotation center. Therefore, if the dimension between the rear wall of the housing and the actuator guide member is not long, the actuator guide The movement dimension of the member cannot be made large, and the length of the housing and the vertical dimension are inevitably large. That is, when a reliable performance is required, there is a problem that the housing is inevitably increased in size, and as the size is increased, the length of the intermediate member is shortened and the stroke of the drawer is reduced.

On the other hand, if the dimension between the rear wall of the housing and the actuator guide member is short, the movement dimension of the actuator guide member is small, so that the engagement area between the actuator guide member and the lateral portion of the slot is small, and the compression energy of the spring is reduced. Since accumulation cannot be reliably maintained, there is a limit to reducing the length of the housing.
Therefore, the automatic pull-in position of the moving member cannot be appropriately selected according to the use location so as to be close to the final storage position of the moving member according to the use location.

Further, the lateral movement of the actuator guide member is performed by the rotation of the guide pin with the rear wall of the housing as the center of rotation, so that for the reasons described above, the housing becomes large and is exposed and attached to the outside. It was not preferable in terms of appearance, and had to be attached to the inner surface of the rearmost part of the fixed side member (outer member).
If the web slot corresponding to the actuator guide member of the housing is formed as a separate member and attached to the moving member, it cannot be processed within the thickness of the slide rail and protrudes to the drawer side connected to the moving member. The outer dimensions of the drawers that fit inside the cabinet had to be reduced.
Therefore, in order to maintain the outer dimension of the drawer at a predetermined size, a web slot for moving the actuator guide member has to be formed directly at the rear end of the moving member, and therefore, a general slide rail, The slide rail having the automatic pull-in function has a different shape of the moving member, and the automatic pull-in function cannot be added to a general slide rail as necessary.

Special table 2003-53660 gazette

  The present invention can be configured compactly with a simple structure, and can easily add an automatic pull-in function to a general slide rail that has already been manufactured, if necessary, without affecting the stroke of drawers and the like. In addition, an object of the present invention is to provide an automatic retracting device that can obtain an automatic retracting function regardless of a slide rail by being attached to a fixed body and a movable body.

Therefore, in order to solve the above problems, the present invention is configured as the first means. In the automatic retracting apparatus that automatically retracts the moving body drawn from the fixed body from the predetermined position to the fixed body, the automatic retracting apparatus is A retracting guide member attached to the fixed body and an engaging member attached to the moving body. The retracting guide member is connected to a retracting guide groove formed in the moving direction of the moving body and a front end portion of the retracting guide groove. A case body having a locking groove provided, a guide rod disposed in the case body in the moving direction of the moving body along the pull-in guide groove, and a front and rear end portions held by the case body, and an outer fit to the guide rod The locking body is movable in the moving direction of the moving body, and has a locking body having a locking projection facing the pull-in guide groove, and a spring body that is externally attached to the guide rod and located on the pulling side of the locking body. When the engagement member moves from the retracted state, the engagement member engages with the engagement protrusion, compresses the spring body along the retraction guide groove, moves the engagement body forward, and engages from the front end of the retraction guide groove. A locking member engaging surface that moves the locking protrusion into the stop groove, and the locking protrusion is locked by the repulsive force of the spring body when the moving body is retracted, and pulls the moving body together with the engaging member; It has a predetermined distance from the front side of the engaging surface, and has an escape guide surface that retracts the locking projection from the locking groove and moves it to the guide groove when the moving body is stored. The locking body is orthogonal to the guide rod. It is provided so as to be freely rotatable in the direction of movement.

Next, in order to solve the above-mentioned problem, the present invention is configured as the second means, in addition to the structure as the first means, and at the rear end portion of the retracting guide groove, there is a return elastic leg. The return elastic leg is elastically deformable and has a notch for deformation, which is in contact with the locking protrusion located at the rear end of the pull-in guide groove and locked against the elasticity of the return elastic leg. A guide relief surface for rotating the body and bringing the locking projection into contact with the locking body engaging surface is provided continuously behind the locking body engaging surface of the engaging member. Item 2. The automatic retracting device according to Item 1.

Next, in order to solve the above-mentioned problem, the present invention is configured as the third means, in addition to the configuration as the first means or the configuration as the second means, in addition to the retracting guide member. Is detachably coupled to the upper surface of the upper bent edge of the fixed member of the slide rail, and the engaging member is detachably provided on the moving member via a coupling fitting at a position corresponding to the pull-in guide member. It is what.

From what has been configured as a first means of the present invention, pull the guide rod of the guide member is held before the rear end portion to the case body, the engaging member is freely guided rotate relative to the guide rod in a straight direction orthogonal Because it is provided on the rod, regardless of the length of the guide rod (size of the case body), the locking projection always ensures a certain range of movement, and the locking projection is locked in the locking groove. Since the state is stably maintained, the case body can be made compact by reducing the size as much as possible, and the locking protrusion and the locking groove can be locked even if the moving body is shortened in the moving direction. Therefore, the automatic pull-in position of the moving body can be appropriately selected according to the place of use.
Since the case body can be made compact, it not only has a very small effect on the stroke of the drawer, etc., but it is also inconspicuous even if it is attached to the outside of the rail etc., so it is attached directly to the fixed body and moving body regardless of the rail It is also possible to add a pull-in function later.

Next, according to the second means of the present invention, in addition to the above effect, a return elastic leg and a deformation notch are formed at the rear end of the pull-in guide groove, Since the guide relief surface is connected to the rear of the engaging body engaging surface, the movable member is pulled out (with the engaging member positioned in front of the retracting guide member) Even if the locking state of the locking protrusion is unexpectedly shifted and the locking body is located at the rear end of the guide groove, if the engaging member moves backward together with the moving body, the guide relief surface becomes the locking protrusion. The locking body rotates around the guide rod while the return elastic leg is elastically deformed into the notch for deformation against the elasticity of the return elastic leg, and eventually the guide projection is guided. Get over the top of the relief surface and return to its original position by the elasticity of the return elastic leg. It will be in the state located in the front side of the latching body engagement surface.
Therefore, even if the engagement member is located in the front and the engagement state of the engagement groove and the engagement projection is unexpectedly shifted and the engagement body moves rearward, the movable body (moving side rail) The normal pull-in function can be restored by a natural operation of moving the engagement body backward.

Next, according to the configuration of the third means of the present invention, in addition to the effect of the configuration as the first means, or the effect of the configuration as the second means,
The retracting guide member is detachably connected to the upper surface of the upper bent edge of the fixed member of the slide rail, and the engaging member is detachably attached to the moving member via the connecting bracket at a position corresponding to the retracting guide member. Since it is provided, a slide rail having a pull-in function can be easily obtained by attaching to a general slide rail.
Since the pull-in guide member is attached to the upper surface of the upper bent edge of the fixed member, the pull-in guide member is located between the main body such as the cabinet and the moving body such as the drawer and does not affect the external dimensions of the drawer or the like.

FIG. 1 is a perspective view of a slide rail with the present invention in a reduced state. FIG. 2 is a perspective view of an extended state of a slide rail provided with the present invention. FIG. 3 is a rear view of the slide rail provided with the present invention. FIG. 4 is a basic sectional view of the slide rail. FIG. 5 is a perspective view of the retracting guide member viewed from the front side. FIG. 6 is an exploded perspective view of the main part of the retracting guide member viewed from the rear side. FIG. 7 is a perspective view of the engaging member and the coupling fitting viewed from the front side. FIG. 8 is an explanatory view showing a state in which the moving member is drawn. FIG. 9 is an explanatory view showing a state in which the locking projection has moved to the front end portion of the retracting guide groove. FIG. 10 is an explanatory view showing a state in which the locking body has rotated and the locking projection has moved into the locking groove. FIG. 11 is an explanatory diagram showing the positional relationship between the locking body and the engaging member in a state where the moving side member is pulled out. FIG. 12 is an explanatory view showing a state where the moving side member is housed and the escape guide surface of the engaging member is in contact with the locking projection. FIG. 13 is an explanatory view showing a state where the moving side member is further accommodated, the locking body is rotated, and the locking projection is positioned at the front end of the retracting guide groove. FIG. 14 is an explanatory view showing a state in which the locking protrusion is positioned at the rear end of the pulling guide groove in a state where the moving side member is pulled out. FIG. 15 is an explanatory view showing a state in which the moving member is housed and the guide relief surface is in contact with the locking projection with the locking projection positioned at the rear end of the retracting guide groove. FIG. 16 is an explanatory view showing a state where the moving side member is further accommodated, the locking body is rotated, and the locking projection gets over the guide escape surface.

  The present invention is detachably coupled to the upper surface of the upper bent edge of the fixed member of the slide rail, and is detachably coupled to the moving member via a coupling fitting at a position corresponding to the retracting guide member. The pull-in guide member includes a pull-in guide groove formed in the moving direction of the moving member, a case body having a locking groove continuously provided at the front end of the pull-in guide groove, and a pull-in guide groove A guide rod disposed on the case body in the moving direction of the moving member along the guide line, and an engagement fitting fitted on the guide rod, movable in the moving direction of the moving member, and facing the pulling guide groove It consists of a stationary body and a spring body which is extrapolated to the guide rod and located on the pulling side of the locking body, and the engaging member is locked to the locking projection during the initial movement of the moving side member and is drawn in While the spring body is compressed along the groove, the locking body is moved forward to move the locking projection from the front end of the pull-in guide groove to the locking groove, and at the same time, the repulsive force of the spring body is engaged when the moving member is retracted. The locking projection engages the locking member engaging surface that pulls the moving member together with the engaging member, and has a predetermined distance from the front side of the locking member engaging surface. It has an escape guide surface that moves from the locking groove to the retracting guide groove, and the locking body is provided so as to be rotatable in a direction perpendicular to the guide rod. An elastic leg and a notch for deformation that can elastically deform the return elastic leg are provided in series, and abut against a locking projection located at the rear end of the pull-in guide groove to resist the elasticity of the return elastic leg. The guide relief surface that rotates the locking body to bring the locking projection into contact with the locking body engaging surface is the engaging portion. Are those provided continuously in the rear of the locking member engaging surface.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.
In FIG. 1, reference numeral 50 denotes an automatic retracting device that is detachably attached to the slide rail 100 of the three member. The automatic retracting device 50 includes a retracting guide member 5 that is detachably attached to the stationary member 1, and The engaging member 6 is detachably attached to the moving member 3 via a coupling metal 7 corresponding to the retracting guide member 5.

In the embodiment, the slide rail 100 includes a fixed member 1, an intermediate member 2 that is slidably held by the fixed member 1, and balls 44 that are rotatably held by the ball retainer 4 on the intermediate member 2. It is comprised from the movement side member 3 hold | maintained slidably via. (Conventionally known configuration)
That is, the fixed member 1 is formed into a channel shape from the base plate 10 and the upper and lower bent edges 11, 11, and rotates to a synthetic resin retainer 12, which is approximately half the length of the fixed member 1. The intermediate member 2 is slidably held via a plurality of balls 13 which are held freely and are positioned between the inner surfaces of the upper and lower bent edges 11 and 11 and the outer surface of the intermediate member 2.
A stopper 15 for storing the intermediate member 2 is formed at the rear end portion of the substrate 10 of the stationary member 1, and a retainer front that restricts the range of movement of the retainer 12 in the pull-out direction is formed at the front end portion of the substrate 10. A stopper (not shown) is formed.
In addition, a rear end portion locking hole (not shown) of the pull-in guide member 5 is provided at the rear end portion of the upper bent edge 11 of the fixed side member 1 and a rear portion of the rear end portion locking hole is in front of a predetermined dimension. A fitting locking protrusion 111 to be opened is formed.

  The intermediate member 2 is substantially the same length as the fixed member 1 and is formed in a substantially channel shape in the same direction as the fixed member 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 outer surface ball sliding groove on which the balls 13... Roll in the sliding direction is provided, and the inner surface ball sliding groove is formed in the inner surface of the upper and lower bent edges 21 and 21 in the sliding direction. Have. An intermediate member rear end stopper 23 is formed at the rear end of the substrate 20 so as to come into contact with the stopper 15 when the intermediate member 2 is stored. A retainer post-retainer (not shown) that restricts the maximum pull-out amount of the intermediate member 2 by abutting the rear end of the retainer 12 whose front end is in contact with the retainer front stopper of the stationary member 1 when the member 2 is fully pulled out. .) Is formed, and a ball retainer front end stopper (not shown) with which the front end portion of the ball retainer 4 abuts is formed at a predetermined position of the front end portion of the substrate 20 when the movable member 3 reaches the maximum extension state. ing.

The moving side member 3 is formed to be approximately the same length as the fixed side member 1 and is slidable through balls 44... Held by the ball retainer 4. It is formed in a substantially C-shaped cross section from the upper and lower bent edges 31 and 31 having a ball sliding groove in the longitudinal direction of the outer surface and the substrate 30 formed by bending both ends in an outward arc shape.
Then, at the rear end portion of the substrate 30, the intermediate member 2 slides in the pulling direction, stops in contact with the rear end portion of the ball retainer 4 in the maximum extended state, and retracts with respect to the intermediate member 2. The movable member rear end stopper 33 is formed so as to come into contact with the intermediate member rear end stopper 23 of the intermediate member 2 and stop when the intermediate member 2 reaches the minimum shortened state.

The ball retainer 4 is a belt-shaped metal plate, which is about half the length of the intermediate member 2 and is large enough to be inserted between the intermediate member 2 and the substrates 20 and 30 of the moving member 3. The U-shaped substrate 40 having a substantially U-shaped cross section from the substrate body 400, the L-shaped protruding from both ends of the U-shaped substrate 40, and the upper and lower bent edges 21, 21 of the intermediate member 2 and the moving member 3; The upper and lower projecting edges 41 and 41 located between 31 and 31 are formed in a substantially U-shaped cross section, and a plurality of balls 44 are rotatably held in the sliding direction of the upper and lower projecting edges 41 and 41.
Then, in the maximum extension state of the moving side member 3, the front end portion comes into contact with the ball retainer front end stopper and stops.

The retracting guide member 5 of the automatic retracting device 50 includes a substantially semi-cylindrical case body 51 that is elongated in the sliding direction of the slide rail 100 and a steel wire disposed in the sliding direction of the slide rail 100 inside the case body 51. A guide rod 52 comprising: a guide rod 52; a spring 53 externally attached to the guide rod 52; and a rear end of the spring 53, fitted on the guide rod 52, and along the guide rod 52 in the sliding direction of the slide rail 100. The locking member 54 is configured to be movable and rotatable about the guide rod 52 as a central axis.

The case body 51 has a coupling notch 511 for coupling formed at the front end portion, and a coupling elastic locking projection 512 protruding rearward from below at the rear end portion, and an elongated rectangular coupling base frame 513. A semi-cylindrical peripheral wall 515 is provided continuously above the connecting substrate 513 and has a semicircular elongated hollow inside that opens downward in the sliding direction of the slide rail.
In the surface portion of the peripheral wall 515, a pull-in guide groove 516 that faces the lower cavity is provided in the pull-out direction of the movable member 3 from the rear end portion to the center slightly forward portion.

Further, an arcuate locking guide surface 517 is formed at the front end portion of the retracting guide groove 516, and a locking groove 518 is formed continuously from the end of the locking guide surface 517 in the circumferential direction of the peripheral wall 515. Yes.
On the other hand, on the same side as the locking groove 518, a return elastic leg 519 and a deformation notch 500 on which the return elastic leg 519 can be elastically deformed are connected to the rear end portion of the pull-in guide groove 516. .
The cavity in the front portion of the peripheral wall 515 in which the pull-in guide groove 516 is formed becomes a storage space at the time of compression of the spring 53 that is compressed when the locking body 54 is locked in the locking groove 518.

The guide rod 52 is made of a steel wire, and the front and rear end portions are attached and held from the lower side to the inner surface side of the front and rear end surfaces of the peripheral wall 515, and are disposed in a cavity facing the drawing-in guide groove 516.
The spring 53 is formed by a coil spring having a length extending over the entire width in the front-rear direction of the member disposing space, and is attached at the same time as the guide rod 52.

The locking body 54 is externally fitted to the guide rod 52, is rotatable in a direction orthogonal to the guide rod 52 with the guide rod 52 as a rotation center, and is slidable in the sliding direction of the movable member 3. It is cylindrical and has a fitting sliding part 541 having a diameter larger than the outer dimension of the spring 53 and a part of the outer periphery of the fitting sliding part 54 sized to protrude outward from the pulling guide groove 516 by a predetermined dimension. The locking projection 542 is provided.

Each member of the pull-in guide member 5 is formed as described above, and the spring 53 is extrapolated to the guide rod 52, and further, the locking member 54 is externally fitted to the guide rod 52 at one end side of the spring 53. In this state, the front and rear ends of the guide rod 52 are placed below the cavity so that the locking body 54 is located on the rear end side of the pulling guide groove 516 and the locking protrusion 542 protrudes upward from the pulling guide groove 516. The guide member 5 is assembled by attaching to the inner surfaces of the front and rear end portions of the peripheral wall 515.

The pull-in guide member 5 is configured as described above, the coupling fitting notch 511 of the case body 51 is fitted and locked to the fitting locking protrusion 111 of the stationary member 1, and the rear end is bent upward. When pressed against the edge 11, the connecting elastic locking projection 512 is elastically deformed and locked in a rear end locking hole (not shown), and is detachably connected to the fixed member 1.

The engaging member 6 that is detachably attached to the moving member 3 via the coupling metal 7 corresponding to the pull-in guide member 5 is formed in a gate shape whose lower part is opened from the left and right side walls 61 and 61 and the upper wall 62. A laterally approximately L-shaped locking projection guide path 60 penetrating in the vertical direction from the rear end portion of the upper wall 62 to the front and slightly central portion is formed.

That is, when the movable member 3 is pulled out, it is locked to the locking projection 542 from the rear side, and the locking body 54 (the locking projection 542) is moved forward while compressing the spring 53, and the repulsive force of the spring 53 is used. The locking protrusion 542 is locked and the locking member engaging surface 63 that pulls the moving member 3 together with the engaging member 6 is connected to the rear of the locking member engaging surface 63. At this time, after contacting the locking projection 542 positioned at the rear end of the pull-in guide groove 516 and rotating the locking body 54 against the elasticity of the return elastic leg 519, the locking projection 542 is engaged. A locking body locking projection 66 having a guide escape surface 65 to be brought into contact with the locking body engaging surface 63 is formed facing the locking projection guide path 60.

A predetermined interval (interval through which the locking projection 542 can pass) is provided on the front side of the locking body engaging surface 63, and when the movable member 3 is stored, the locking projection 542 is pulled from the locking groove 518 to guide the groove. An arcuate escape guide surface 64 to be moved to 516 is formed facing the locking projection guide path 60.

On the other hand, at the front and rear end portions of the continuous portion of the side wall 61 and the upper wall 62 on the escape guide surface 64 side, an inverted L-shaped connecting fitting protrusion that protrudes toward the other side wall 61 with a predetermined distance from the upper wall 62 is provided. Pieces 611 and 611 are formed, and a rear end coupling fitting protrusion 612 is formed at the rear end of the other side wall 61 and protrudes forward in the same shape as the connection fitting protrusion 611. Corresponding to the end connecting fitting protrusions 612, connecting elastic locking protrusions 613 projecting rearward are provided.

The connecting metal member 7 has a substantially reverse cross-section from the engaging member connecting protrusion 71 for connecting the engaging member 6 to the lower surface side and the moving member connecting protrusion 72 connected to the rear end of the moving member 3. It is formed in an L shape.
In the connected state of the engaging member 6, the connecting fitting protrusions 611 and 611 are fitted, and the fitting recesses 711 and 711 that are prevented from moving in the front-rear and vertical directions are engaged. It is formed at the front and rear end portions on the end face side of the member connecting protrusion 71, and the rear end connecting fitting protrusion 612 and the connecting elastic locking protrusion 613 protrude outward from the moving member connecting protrusion 72. A connecting step 73 for preventing is formed at the upper end of the moving side connecting protrusion 72, and connecting holes 721 and 721 for the moving side member 3 are formed at the lower end of the moving side connecting protrusion 72. .

That is, the connecting fitting 7 is connected between the connecting fitting protrusions 611 and 611 and the rear end connecting fitting protrusions 612 and the upper wall 62 from an oblique direction on the connecting locking protrusion 613 side of the engaging member 6. The fitting recesses 711 and 711, the fitting protrusions 611 and 611, and the rear end face of the connecting step 73 and the rear end connecting fitting protrusion 612 are inserted so that the engaging member connecting protrusion 71 is inserted. Is in the state just before mating,
After elastically deforming the connecting elastic locking protrusion 613 on the front end surface of the connecting step 73, the fitting recesses 711, 711, etc. and the fitting fitting protrusions 611, 611, etc. are completely fitted. The engaging member 6 is connected to the connecting fitting 7. The connection fitting 7 to which the engagement member 6 is connected is connected to the rear end portion of the moving member 3 with a connection screw or the like.

In the embodiment, the automatic retracting device 50 of the present invention is attached to the slide rail 100 of the three member. However, the engaging member 6 is detachably provided on a moving body such as a drawer by screwing or the like. Corresponding to the member 6, the pull-in guide member 5 may be detachably attached to a fixed body such as a cabinet body directly by screwing or the like.
The present invention is configured as described above, and the moving member 3 (moving body) is pulled out from the state in which the moving member 3 (moving body) is drawn into the fixed member 1 (fixed body) (the state shown in FIG. 8). Then, since the locking projection 542 of the locking body 54 is positioned on the front side of the locking body engaging surface 63 of the engaging member 6, the locking projection 54 moves forward in the retracting guide groove 516.

In other words, the fitting sliding portion 541 of the locking body 54 slides forward along the guide rod 52 while compressing the spring, and when the locking projection 542 eventually comes into contact with the locking guide surface 517, Since the stop projection 542 moves along the locking guide surface 517 (the state shown in FIG. 9), the locking body 54 rotates in the direction of the locking groove 518 with the guide rod 52 as the rotation center, and eventually When the locking projection 542 reaches the locking groove 518 from the locking body locking projection 66 (the state shown in FIG. 10), the locking body locking projection 66 passes forward, and at the same time, the locking body 54 The spring 53 is pushed back slightly by the repulsive force of the compressed spring 53, and the locking projection 542 is securely locked in the locking groove 518 (the state shown in FIG. 11), and the spring 53 is maintained in the compressed state, and the moving member 3 (the engaging member 6 and the moving body) is pulled forward to a predetermined position.

Next, when the moving side member 3 (the engaging member 6 and the moving body) is housed in the fixed side member 1 (the fixed body), the locking projection guide path 60 of the engaging member 6 is moved to the locking body 54. When the locking projection 542 moves so as to be positioned from the rear end to the front end, and when the escape guide surface 64 comes into contact with the locking projection 542 (the state shown in FIG. 12), the locking projection 542 is moved to the escape guide surface 64. Therefore, when the locking member 54 is rotated in the direction of the pull-in guide groove 516 around the guide rod 52 as a rotation center, the lock protrusion 542 reaches the pull-in guide groove 516 from the lock groove 518 ( The state shown in FIG. 13), due to the repulsive force of the compressed spring 53, the locking projection 542 is securely locked to the locking body engaging surface 63 of the locking body locking projection 66, and the engaging member 6 ( The moving side member 3 (moving body) is pushed backward. (The state shown in FIG. 8) That is, the moving member 3 is automatically drawn into the stationary member 1 and stored.

On the other hand, when the moving member 3 (engaging member 6) is pulled out, the locking state of the locking groove 518 and the locking projection 542 is released due to an unexpected accident, and the locking body 54 is repelled by the repulsive force of the spring 53. Only,
When the movable member 3 (engagement member 6) is housed in the state of being positioned on the end side of the pull-in guide groove 516 (the state shown in FIG. 14), the guide relief is released to the engagement protrusion 542 of the engagement body 54. The surface abuts and the guide relief surface rotates the locking body 54 around the guide rod 52 while elastically deforming the return elastic leg 519 toward the notch 500 for deformation against the elasticity of the return elastic leg 519. When the movable member 3 is accommodated and the locking member locking projection 66 passes through the locking projection 542 (the state shown in FIG. 16), the return side is returned. The locking body is rotated in the reverse direction by the elastic force of the elastic leg, the locking projection 542 is positioned on the front side of the locking body engaging surface 63 (the state shown in FIG. 8), and the moving member 3 (moving body) Alternatively, the engaging member 6) is automatically drawn in a normal state.

  As described above in detail, the present invention is not only used by being attached to a slide rail, but also is a drawer such as a fixed body such as a cabinet body (a stationary member in the case of a slide rail) and a cabinet body. Since it can be used by being attached directly to a moving body such as a drawer or a moving member (a moving side member, for example, a slide rail), it can be used in a wide range.

DESCRIPTION OF SYMBOLS 1 Fixed side member 100 Slide rail 3 Moving side member 5 Pull-in guide member 51 Case body 500 Deformation notch 515 Peripheral wall 516 Pull-in guide groove 517 Locking guide surface 518 Locking groove 519 Return elastic leg 52 Guide rod 53 Spring 54 Locking body 541 Fitting sliding portion 542 Locking protrusion 6 Engaging member 60 Locking protrusion guide path 63 Locking body engaging surface 64 Escape guide surface 65 Guide relief surface 66 Locking body locking protrusion

Claims (3)

In the automatic retracting apparatus that automatically retracts the moving body pulled out from the fixed body to the fixed body from a predetermined position, the automatic retracting apparatus includes a retracting guide member attached to the fixed body and an engaging member attached to the moving body. The retraction guide member includes a retraction guide groove formed in the moving direction of the moving body, a case body having a locking groove continuously provided at the front end of the retraction guide groove, and the movement of the moving body along the retraction guide groove. The guide rod is disposed in the direction and the front and rear end portions are held on the case body, and the locking body is externally fitted to the guide rod, and is movable in the moving direction of the moving body, and has a locking projection facing the pull-in guide groove. And a spring body that is externally attached to the guide rod and positioned on the pulling side of the locking body, and when the moving body moves from the retracted state, the engaging member is locked to the locking projection and is pulled into the pulling guide groove. While the spring body is compressed, the locking body is moved forward to move the locking protrusion from the front end of the pull-in guide groove to the locking groove, and when the moving body is retracted, the locking protrusion is caused by the repulsive force of the spring body. The locking body engaging surface that locks and pulls the moving body together with the engaging member, and has a predetermined distance from the front side of the locking body engaging surface. An automatic retracting device having an escape guide surface to be moved to the retracting guide groove, wherein the locking body is rotatably provided in a direction orthogonal to the guide rod. A return elastic leg and a deformation notch for elastically deforming the return elastic leg are connected to the rear end of the pull-in guide groove so as to contact the locking protrusion located at the rear end of the pull-in guide groove. The guide relief surface that contacts and rotates the locking body against the elasticity of the return elastic leg to bring the locking projection into contact with the locking body engaging surface is engaged with the locking body of the engaging member. The automatic retracting device according to claim 1, wherein the automatic retracting device is provided continuously behind the surface. The retracting guide member is detachably connected to the upper surface of the upper bent edge of the fixed member of the slide rail, and the engaging member is detachably attached to the moving member via the connecting bracket at a position corresponding to the retracting guide member. The automatic retracting device according to claim 1, wherein the automatic retracting device is provided.