JP2007268240A - Slide rail unit with holding function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a slide rail unit which can automatically draw an inner rail into an outer rail without applying large pressing force and hold such a state, when the inner rail is housed in the outer rail, and further, can be manufactured by a small number of parts at a low cost. <P>SOLUTION: The slide rail unit with holding function includes: a holding pin 30 raised movably in the longitudinal and transverse directions relative to a first rail 1; a resilient member 31 to energize the holding pin 30 toward the stroke end of a second rail 2; a pin guide member 32 which is provided at the first rail 1 to be locked to the holding pin 30 at a stand-by position away from the stroke end while resisting against energizing force of the resilient member 31 and guides the holding pin 30 separated from the stand-by position toward the stroke end with the energizing force; and a cam member which is provided at the second rail 2 to separate the holding pin 30 from the stand-by position of the guide member 32 so as to be locked, as the cam member is overlapped with the pin guide member 32. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention provides a slide rail that is provided between a pair of members that reciprocate relatively along a predetermined direction, such as a drawer in furniture and a paper tray in a copying machine, and supports the relative advancing and retreating movement of these members. The present invention relates to a unit, and more particularly to a slide rail unit that can urge a movable member toward the terminal end at the end of the stroke of such forward / backward movement and hold it in the terminal position.

  Conventionally, a slide rail unit including an outer rail and an inner rail is known as a guide member for supporting the advancing and retreating movement of a movable member such as a drawer in furniture or a system kitchen (Japanese Patent Laid-Open No. 11-201158). Specifically, an outer rail formed in a channel shape by bending and raising a pair of ball rolling portions along the longitudinal direction, and formed to be slightly smaller than the outer rail, again bending and raising the pair of ball rolling portions. An inner rail formed in a channel shape, a large number of balls that roll on the inner side of the ball rolling part of the outer rail and the outer side of the ball rolling part of the inner rail, and a predetermined ball between the outer rail and the inner rail. For example, the outer rail is fixed to the furniture body, and the inner rail is fixed to both side surfaces of the drawer.

  Since the inner rail is fitted to the inner side of the outer rail via a ball, the inner rail can be freely pulled out from the inside of the outer rail, and the ball is moved together with the retainer as the inner rail is pulled out. It is designed to move inside. As a result, the drawer can be freely pulled out from the furniture body or pulled into the furniture body.

In addition, this slide rail unit eliminates the half-open state of the closed bag drawer and eliminates the inconvenience of the drawer being opened freely due to an earthquake or the like. There has also been proposed a type in which an urging force for pulling the inner rail into the outer rail acts on the inner rail, and the inner rail is pulled into the outer rail by this urging force and held as it is (Japanese Patent Laid-Open No. 6-245830, in particular). (Kaihei 11-206489, JP-A-2004-344188).

  In the slide rail unit disclosed in Japanese Patent Application Laid-Open No. 6-245830, a roller provided on the inner rail rolls on the outer rail so that the inner rail can freely advance and retreat along the outer rail. When the inner rail is pulled into the outer rail, the roller is configured to get over the leaf spring provided on the outer rail side, and the roller is urged in the pulling direction of the inner rail by the leaf spring. . Further, the inner rail cannot be pulled out from the outer rail unless the roller gets over the leaf spring in the reverse direction, and a light locking force acts on the direction in which the inner rail is pulled out from the outer rail.

  Further, in the slide rail unit disclosed in Japanese Patent Application Laid-Open No. 11-206489, a regulating body made of a leaf spring is disposed in the outer rail so as to be rotatable and biased to a predetermined posture, An engagement shaft that engages with the restricting body is fixedly erected on the inner rail. When the inner rail is pushed into the outer rail, the engaging shaft presses the restricting body, and at first, the restricting body exerts a biasing force in a direction to push back the inner rail. However, when the inner rail is pushed against the biasing force, The restricting body rotates over the dead point, and this time, the restricting body exerts a biasing force in a direction to draw the inner rail into the outer rail. In addition, when the inner rail is pulled out from the outer rail, the regulating body must rotate over the dead center again. As a result, a light locking force acts on the direction in which the inner rail is pulled out from the outer rail.

Further, in the slide rail unit disclosed in Japanese Patent Application Laid-Open No. 2004-344188, a guide case of a piece part biased by a spring with respect to the outer rail is attached, and the piece part that slides inside the case is attached. By engaging or disengaging a pin erected on the inner rail side, the inner rail is drawn into the outer rail, and the drawn inner rail is held in the outer rail. Since the piece on the inner rail side engages or disengages the pin on the inner rail, it is formed into a predetermined shape by synthetic resin and is given a spring property, and is elastically deformed in the case, so that the pin Can be engaged and disengaged.
Japanese Patent Laid-Open No. 11-201158 JP-A-6-245830 Japanese Patent Application Laid-Open No. 11-2064889 JP 2004-344188 A

  However, in the slide rail units disclosed in JP-A-6-245830 and JP-A-11-206489, when the inner rail is housed in the outer rail, the inner force is opposed to the urging force of the leaf spring. It is necessary to push the rail into the outer rail. For example, when the drawer is pushed into the furniture body, a large pressing force is required. Also, in the urging of the inner rail using a leaf spring, the distance that the urging force acts cannot be set long, and the urging force acts abruptly in a short distance, so when opening and closing the drawer There was also an inconvenience that the feeling of use would be poor.

  Furthermore, in the slide unit disclosed in Japanese Patent Application Laid-Open No. 2004-344188, a synthetic resin piece part, a case for guiding it, and the like are required, which takes time for assembly and increases production costs. There was inconvenience. Further, since the piece part allows the inner rail side pin to be engaged or disengaged by its elastic deformation, the selection of the material is limited, and this also has the disadvantage of increasing the production cost. .

  The present invention has been made in view of such problems, and the object thereof is to automatically retract the inner rail into the outer rail without applying a large pressing force when the inner rail is stored in the outer rail. An object of the present invention is to provide a slide rail unit with a holding function that can hold the retracted state and can be easily produced at a low cost with a small number of parts.

  That is, the slide rail unit of the present invention includes the first rail, the second rail that can be freely stroked along the longitudinal direction of the first rail, and the second rail in the vicinity of the stroke end of the second rail. It is comprised from the termination | terminus urging means which urges | biases this rail toward a stroke | terminus end. For example, when the second rail is pulled into the first rail, the end biasing means biases the second rail toward the stroke end in the vicinity of the end of the moving stroke, and assists in pulling in the second rail. Demonstrates a holding force that keeps it pulled to the end. As a result, in the drawer of furniture supported using this slide rail unit, the inconvenience of the drawer becoming half-open due to the recoil when closed or unintentionally opening due to an earthquake is avoided. Can be done.

  The terminal urging means includes a holding pin erected so as to be movable in the longitudinal direction and the width direction with respect to the first rail, and an elastic force that constantly urges the holding pin toward the stroke end of the second rail. And a holding pin that is provided on the first rail and is held at a standby position away from the stroke end against the biasing force of the elastic member, and the holding pin released from the standby position is attached to the first rail. A pin guide member that is guided toward the stroke end in accordance with the force, and a second guide rail that is provided on the second rail and causes the holding pin to be removed from the standby position of the pin guide member as it overlaps with the pin guide member. And a cam member for locking the holding pin.

  The holding pin is provided on the first rail and is locked at the standby position of the pin guide member in a state where the elastic member is extended, and the urging force of the elastic member is always acting. Therefore, when it leaves | separates from a standby position, it moves toward the stroke end of a 2nd rail with the urging | biasing force of the said elastic member. On the other hand, as the cam member provided on the second rail overlaps with the pin guide member on the first rail side, the cam member acts to detach the holding pin from the standby position, and locks the holding pin after detachment. It is like that.

  Therefore, when the second rail strokes with respect to the first rail and the cam member gradually overlaps with the pin guide member, the holding pin is released from the standby position of the pin guide member and the cam member. The second rail is pulled toward the end of the stroke by the urging force of the elastic member. As a result, the second rail can be automatically retracted relative to the first rail, and the retracted state can be maintained.

  At this time, the holding pin that has been set to the standby position is only changed in its setting position by the cam member. Therefore, when the holding pin is removed from the standby position, an elastic member is used for the second rail. It is not necessary to apply a pressing force against the urging force, and the second rail can be automatically retracted with respect to the first rail simply by moving the second rail lightly. Further, the cam member only needs to be formed on the second rail with a cam groove acting on the holding pin, and can be easily produced at a low cost with a small number of parts.

  Hereinafter, the slide rail unit of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 shows one embodiment of a slide rail unit to which the present invention is applied. The slide rail unit includes an outer rail 1, an inner rail 2 housed in the outer rail 1, a ball 3 as a rolling element that rolls between the outer rail 1 and the inner rail 2, and the outer rail 1 and the inner rail. 2 and a retainer 4 for arranging a large number of balls 3 at a predetermined interval.

  For example, as shown in FIG. 2, the slide rail unit is used as a slide mechanism for the drawer 51 with respect to the furniture body 50. The outer rail 1 is fixed to the furniture body 50 and the inner rail 2 is fixed to the drawer 51. The main body 50 can be smoothly inserted and removed.

  The outer rail 1 is formed by precision forming a steel plate by roll forming, and is formed in a channel shape by bending a pair of ball rolling portions 12 and 12 along the longitudinal direction of the attachment portion 11. A ball rolling surface 13 having a curvature approximate to the spherical surface of the ball 3 is formed on the inner side surface of the ball rolling portion 12.

  On the other hand, the inner rail 2 is similarly formed from a steel plate and formed into a channel shape by bending the pair of ball rolling portions 22 and 22 along the longitudinal direction of the mounting portion 21. However, since the inner rail 2 is housed between the ball rolling portions 12 and 12 of the outer rail 1 and the balls 3 are arranged between the inner rail 2 and the outer rail 1, the inner rail 2 is formed to be slightly smaller than the outer rail 2 and A ball rolling surface 23 is formed on the outer surface of the rolling part 22.

  The mounting portions 11 and 21 of the rails 1 and 2 are respectively provided with screw holes 14 and 24 through which the mounting screws 5 penetrate. As shown in FIG. 50, the inner rails 2 are fixed to the drawers 51 using the mounting screws 5, respectively.

  The retainer 4 is formed by pressing a steel plate or by injecting a synthetic resin into a mold, and is inserted between the outer rail 1 and the inner rail 2 as shown in FIG. A large number of balls 3 rolling between the rails 1 and 2 are aligned at equal intervals to prevent contact between adjacent balls.

  In the slide rail unit configured as described above, since the outer rail 1 and the inner rail 2 are fitted via the ball 3 as described above, the rolling of the ball 3 causes the inner rail 1 to move inside the outer rail 1. The inner rail 2 housed in the outer rail 1 can be pulled out smoothly from the outer rail 1.

  This slide rail unit is configured to have the shortest overall length when the inner rail 2 is completely overlapped with the outer rail 1, that is, when the inner rail 2 is completely pulled into the outer rail 1, for example, as described above. The state in which the drawer 51 is completely stored in the furniture body 50 corresponds to this state. In such use, in order to securely store the drawer 51 in the furniture body 50 and to maintain the state, the slide rail unit has a mechanism 6 for assisting the inner rail 2 to be pulled into the outer rail 1. Is provided. When the inner rail 2 is pulled into the outer rail 1, the mechanism 6 acts slightly before the end position of the stroke of the inner rail 2, and the inner rail 2 is moved using the biasing force of a tension spring as an elastic member. It is configured to be pulled into the outer rail 1.

  This auxiliary mechanism, that is, the terminal end biasing means 6 in the present invention, is a holding pin 30 that is provided so as to be movable with respect to the outer rail 1 and an elastic force that constantly biases the holding pin 30 in the retracting direction of the inner rail 2. A member 31; a pin guide member 32 that is fixed to the outer rail 1 and moves the holding pin 30 along a predetermined path; and the holding pin that is provided on the inner rail 2 and moves according to the movement of the inner rail 2 The cam member 33 is configured to move 30 and is attached to the end portions of the outer rail and the inner rail as shown in FIG. When the inner rail 2 is pulled into the outer rail 1, the cam member 33 provided on the inner rail 2 side engages with the holding pin 30 on the outer rail 1 side, and the tensile force (biasing force) of the elastic member 31 is held. Since it acts on the inner rail 2 via the pin 30, the inner rail 2 can be completely pulled into the outer rail 1 by this urging force.

  4a, 4b, and 4c are views showing the relationship between the holding pin 30, the pin guide member 32, and the cam member 33. FIG. 4b is a view taken along the arrow B in FIG. 4a, and FIG. 4c is the arrow C in FIG. FIG. In these drawings, the pin guide member 32 is made of synthetic resin, and includes a front plate portion 32a, a pair of leg portions 32b and 32b protruding from both sides of the front plate portion 32a, and the leg portions 32b. The front plate portion 32 a and the back plate portion 32 c facing each other are provided, and the back plate portion is fixed to the outer rail 1. A space is formed between the front plate portion 32 a and the back plate portion 32 c, and this space serves as a movement space for the holding pins 30. The front plate portion 32 a is formed with a guide groove 60 that restricts the movement of the holding pin 30, and the holding pin 30 is inserted into the guide groove 60 and protrudes toward the cam member 33. On the other hand, the holding pin 30 has a disk-shaped base portion 30 a, and the base portion 30 a is sandwiched between the back plate portion 32 c and the front plate portion 32 a of the pin guide member 32. Therefore, the holding pin 30 can freely move with respect to the outer rail 1 with its tip protruding from the guide groove 60. When an external force acts on the tip, the holding pin 30 moves in the guide groove 60 according to its direction. Moving. The pin guide member 32 can be formed by bending a metal plate as shown in FIG. 5. In this case, the back plate 32c is omitted, and the leg portion 32b is directly attached to the outer rail as shown in FIG. 1 can be fixed.

  One end of a tension spring 31 as an elastic member is fixed to the base portion 30 a of the holding pin 30, and the other end of the tension spring 31 is fixed to a stud 32 c provided on the pin guide member 32. Yes. The stud 32 c is located on the end side of the outer rail 1 with respect to the guide groove 60. Regardless of the position of the holding pin 30 set in the guide groove 60, the tension spring 31 is in an extended state, and the biasing force of the tension spring 31 is applied to the holding pin 30 in the direction of the end of the outer rail 1, that is, the inner rail. It always acts in the direction in which the rail 2 is retracted.

  On the other hand, the guide groove 60 has a locking recess 61 for locking the holding pin 30 against the urging force of the tension spring 31, and is continuous from the locking recess 61 and along the longitudinal direction of the outer rail 1. And a tension guide portion 62 formed. The locking recess 61 is a standby position where the holding pin 30 is set when the inner rail 2 is pulled out from the outer rail 1. When the holding pin 30 is set in the locking recess 61, the tension spring 31 is set. Is in its most stretched state. Therefore, when the holding pin 30 comes out of the locking recess 61 which is the standby position by the action of the cam member 33 described later, the holding pin 30 moves the pulling guide portion 62 at a stroke by the urging force of the pulling spring 31, and this is applied. It moves to the end of the pulling guide part 62.

  Further, the holding pin 30 that has been detached from the standby position (the locking recess 61) regardless of the movement of the cam member 33 on the inner rail 2 side is provided at the end of the pulling guide portion 62 adjacent to the stud 32c. A retracting recess 63 is formed for use in resetting to the standby position. The retracting recess 63 is formed so as to cross the pulling guide portion 62 at an angle. A detailed method of using the retracting recess 63 will be described later.

  Next, the cam member 33 provided on the inner rail 2 side will be described. The cam member 33 is formed by cutting a guide groove 64 in a metal plate, and is fixed to the inner surface of the inner rail 2 so as to face the pin guide member 32 on the outer rail 1 side. The guide groove 64 is configured as a so-called cam groove that changes the setting position of the holding pin 30 in accordance with the movement of the inner rail 2 with respect to the outer rail 1, and introduces the leading end of the holding pin 30 set at the standby position. 65, an action part 66 that moves the received holding pin 30 in the width direction of the outer rail 1 to leave the standby position, and a pin detainment part 67 that holds the holding pin 30 that has passed through the action part 66 It has. The pin retaining portion 67 faces the pull guide portion 62 of the pin guide member 32, and the holding pin 30 can move the pull guide portion 62 while being locked to the pin retaining portion 67. Yes.

  As shown in FIG. 4 c, the pin guide member 32 and the cam member 33 face each other between the outer rail 1 and the inner rail 2, and the tip of the holding pin 30 protruding from the pin guide member 32 is a guide for the cam member 33. It is inserted into the groove 64. However, since the cam member 33 has only to have a guide groove 64 into which the tip of the holding pin 30 is inserted, the cam member 33 in which the guide groove 64 is formed is not fixed to the inner rail 2, As shown in FIGS. 1 and 6, it is sufficiently possible to form the guide groove 64 directly on the mounting portion 21 of the inner rail 2 and use the formed portion as the cam member 33.

  FIGS. 7 a to 7 f show the operation of the holding pin 30 when the inner rail 2 is pulled into the outer rail 1 over time. As shown in FIG. 7a, when the inner rail 2 is pulled out from the outer rail 1 and the cam member 33 is completely separated from the guide groove 60 of the pin guide member 32, the holding pin 30 is in the standby position, that is, the guide It is set in the locking recess 61 of the groove 60. In this state, the pulling force of the elastic member 31 is acting on the holding pin 30, but the holding pin 30 enters and is locked in the locking recess 61 and maintains the state set at the standby position. . Here, when the inner rail 2 is drawn into the outer rail 1 and the cam member 33 overlaps the guide groove 60 as shown in FIG. 7b, the holding pin 30 enters the guide groove 64 from the introduction portion 65, and remains as it is. As the pull-in of 1 proceeds, it strikes against the action portion 66 as shown in FIG. 7c. Since the action portion 66 is provided obliquely with respect to the moving direction of the inner rail, when the inner rail is drawn in as it is, the holding pin 30 is moved in the moving direction of the inner rail (in the drawing, as shown in FIG. 7d). It is biased in the direction orthogonal to the direction of the arrow), and is released from the locking recess (standby position) 61 of the guide groove 60. Further, in the guide groove 64 of the cam member 33, the holding pin 30 passes through the action portion 66 and enters the pin retaining portion 67, and the retaining pin 30 is locked by the pin retaining portion 67.

  As described above, since the pin retaining portion 67 of the cam member 33 faces the pulling guide portion 62 of the guide groove 60, the holding pin 30 is set to the pin retaining portion 67 of the cam member 33 as shown in FIG. Then, the holding pin 30 moves at once in the pull-in direction of the inner rail 2 due to the urging force of the elastic member 31. At this time, since the holding pin 30 is locked to the pin retaining portion 67 of the cam member 33, the tensile biasing force of the elastic member 31 acts on the cam member 33 and eventually the inner rail 2 via the holding pin 30. The inner rail 2 is automatically drawn into the outer rail 1. As a result, as shown in FIG. 7 f, the inner rail 2 is pulled to the end position of the stroke range and is held at that position by the urging force of the elastic member 31.

  As described above, in the slide rail unit of the present invention, when the inner rail 2 is pulled into the outer rail 1, when the inner rail 2 reaches the end of its stroke range, the inner rail 2 is held by the action of the cam member 33 on the inner rail 2 side. The pin 30 is detached from the standby position, and the urging force of the elastic member 31 acting on the holding pin 30 acts at a stroke, so that the inner rail 2 can be automatically drawn into the outer rail 1. Further, since the urging force of the elastic member 31 acts as a holding force in the retracted state, it is possible to prevent the inner rail 2 from jumping out of the outer rail 1 unintentionally. When the unit is used, it is possible to eliminate the half-open state of the drawer.

  On the other hand, when the inner rail 2 is pulled out from the outer rail 1, the holding pin 30 is set at the standby position in the completely reverse order of FIGS. 7a to 7f. That is, since the inner rail 2 is pulled out from the outer rail 1 in a state where the holding pin 30 is locked to the pin retaining portion 67 of the cam member 33, the holding pin 30 is pulled against the urging force of the elastic member 31. Is moved toward the locking recess 61. Since the guide groove 60 from the pulling guide portion 62 to the locking recess 61 is formed obliquely with respect to the pulling direction of the inner rail 2, when the inner rail 2 is further pulled out from the outer rail 1, the guide groove 60 is camped. It acts on the holding pin 30 as a groove, and the holding pin 30 is set in the locking recess 61 by being offset in a direction perpendicular to the moving direction of the inner rail 2. Further, at this time, the holding pin 30 comes out of the pin retaining portion 67 of the cam member 33, and reaches the introduction portion 65 through the action portion 66 (state of FIG. 7c). As a result, the holding pin 30 can be extracted from the cam member 33, the cam member 33 on the inner rail 2 side can be separated from the pin guide member 32 on the outer rail 1 side, and the inner rail 2 can be pulled out from the outer rail 1. Become. In addition, the holding pin 30 is set in the locking recess (standby position) 61 of the guide groove 60 in a state where the elastic member 31 is extended, and the next time the inner rail 2 is drawn into the outer rail 1, the FIG. It is possible to assist the pull-in of the inner rail 2 by the procedure shown in FIG.

  Thus, normally, in the state where the inner rail 2 is pulled out from the outer rail 1, the holding pin 30 is set in the locking recess 61 of the guide groove 60. However, the impact is applied to the outer rail 1, etc. Without this, the holding pin 30 may come out of the locking recess 61, and in this case, the holding pin falls to the end position of the pulling guide portion 62 as shown in FIG. 7a. If the holding pin 30 is set unintentionally at such a position, the holding pin 30 must be returned to the locking recess 61, and the holding pin 30 becomes an obstacle, and the inner rail 2 is moved to the outer rail 1. It will not be able to be completely drawn in. For this reason, this slide rail unit is provided with a mechanism for returning the holding pin 30 to the locking recess (standby position) 61.

  Specifically, a tapered scooping portion 68 is formed with respect to the introduction portion 65 of the cam member 33, and the holding pin 30 is temporarily accommodated between the scooping portion 68 and the pin placement portion 67. A temporary fixing recess 69 was formed. The temporary fixing recess 69 faces the pulling guide portion 62 of the pin guide member 32 in the same manner as the pin retaining portion 67. Further, as described above, the retracting recess 63 that continues from the end of the pulling guide portion 62 is formed in the guide groove 60 of the pin guide member 32. The retracting recess 63 corresponds to the introduction portion 65 of the cam member 33.

  8a to 8f show a series of movements of the holding pin 30 when the holding pin 30 that has been unintentionally detached from the standby position is returned to the standby position. As shown in FIG. 8a, when the holding pin 30 is detached from the standby position with the inner rail 2 pulled out from the outer rail 1 and exists in the pulling guide portion 62, the inner rail 2 is once pulled into the outer rail 1, By pulling out the inner rail 2 from the outer rail 1 again, it is possible to reset the holding pin 30 to the standby position. As shown in FIGS. 8 a and 8 b, when the inner rail 2 is pulled into the outer rail 1 and the cam member 33 overlaps the guide groove 60 on the outer rail 1 side, the holding pin 30 is lifted up by the scooping portion 68 of the cam member 33. As a result, it is biased in a direction perpendicular to the pull-in direction of the inner rail 2, and enters the retracting recess 63 of the guide groove 60 as it is (see FIG. 8c). Since the retracting recess 63 is formed obliquely with respect to the retracting direction of the inner rail 2, the pulling force of the elastic member 31 is maintained even when the holding pin 30 is biased by the scooping portion 68 of the cam member 33. By this, it is going to return to the pulling guide part 62 of the guide groove 60. Therefore, when the inner rail 2 is further retracted and the holding pin 30 passes through the scooping portion 68 as shown in FIG. 8c, the holding pin 30 enters the temporary fixing recess 69 provided in the cam member 33. The cam member 33 is locked at this position (see FIG. 8d).

  Since the temporary fixing recess 69 faces the pulling guide portion 62 of the guide groove 60, when the inner rail 2 is further pulled out in a state where the holding pin 30 is locked to the temporary fixing recess 69 of the cam member 33. The holding pin 30 moves the pulling guide portion 62 toward the locking recess 61 against the urging force of the elastic member 31 (see FIG. 8e). Since the guide groove 60 from the pulling guide portion 62 to the locking recess 61 is formed obliquely with respect to the pulling direction of the inner rail 2, when the inner rail 2 is further pulled out from the outer rail 1, the guide groove 60 is camped. It acts on the holding pin 30 as a groove, and the holding pin 30 is set in the locking recess 61 by being offset in a direction perpendicular to the moving direction of the inner rail 2. At this time, the holding pin 30 comes out of the temporary fixing recess 69 of the cam member 33 and is set to the introduction portion 65 (state shown in FIG. 8f). As a result, the holding pin 30 can be reset to the locking recess 61 of the pin guide member 32, and the holding pin 30 can be extracted from the cam member 33 and the inner rail can be extracted from the outer rail.

  That is, in this slide rail unit, the holding pin 30 unintentionally leaves the standby position with the inner rail 2 pulled out from the outer rail 1, and the end position of the pulling guide groove 62 by the urging force of the elastic member 31. If the inner rail 2 is once pulled into the outer rail 1 and pulled out from the outer rail 1 again, the holding pin 30 can be returned to the standby position. It is excellent in nature.

  On the other hand, FIG. 9 shows another example of the cam member 33.

  As shown in FIG. 2, when the slide rail unit is used for the slide mechanism of the drawer 51 with respect to the furniture body 50, the end of the stroke range when the inner rail 2 is pulled into the outer rail 1 is pulled out with respect to the furniture body 50. If it is completely coincident with the end when the 51 is retracted, the urging force of the elastic member 31 does not act on the inner rail 2 reliably at the end, and the high sealing property between the drawer 51 and the furniture body 50 is high. May not be able to keep. That is, in order to securely pull the drawer into the furniture body, it is necessary that the inner rail has not yet reached the end position at the end position of the drawer.

  However, in the guide groove 64 of the cam member 33 shown in FIG. 4a, the temporary fixing recess 69 is cut out corresponding to the end of the stroke range of the inner rail 2, so that the inner rail 2 reaches the end of the stroke range. If the pull-in of the drawer 51 with respect to the furniture body 50 is locked before the holding pin 30 is unintentionally pulled out of the locking recess 61 and falls to the end position of the pulling guide portion 62, 8, it becomes difficult to move the holding pin 30 to the temporary fixing recess 69.

  Therefore, in the cam member 33a shown in FIG. 9, the width W of the temporary fixing recess 69a is larger than that of the temporary fixing recess 69 shown in FIG. 4a, and slightly before the inner rail 2 reaches the end of the stroke range. The holding pin 30 can be set in the temporary fixing recess 69.

  10a to 10f show a series of movements of the holding pin 30 when the holding pin 30 is returned to the standby position by using the cam member 33a, and the holding pins in FIGS. 8a to 8f described above are shown. It is almost the same as movement. That is, as shown in FIGS. 10 a to 10 c, when the inner rail 2 is pulled into the outer rail 1 and the cam member 33 a overlaps the guide groove 60 on the outer rail 1 side, the holding pin 30 moves up the cam member 33 a. The portion 68 is biased in a direction perpendicular to the pull-in direction of the inner rail 2 and enters the retracting recess 63 of the guide groove 60 as it is. Since the retracting recess 63 is formed obliquely with respect to the retracting direction of the inner rail 2, the pulling force of the elastic member 31 is maintained even when the holding pin 30 is biased by the scooping portion 68 of the cam member 33 a. By this, it is going to return to the pulling guide part 62 of the guide groove 60. Therefore, when the inner rail 2 is further retracted and the holding pin 30 passes through the scooping portion 68 as shown in FIG. 10c, the holding pin 30 enters the temporary fixing recess 69a provided in the cam member 33. The cam member 33 is locked at this position (see FIG. 8d).

  At this time, in FIG. 10d, the inner rail 2 does not reach the end of its stroke range, but since the formation width W of the temporary fixing recess 69a is expanded, the holding pin 30 is set to the temporary fixing recess 69a at this position. It is possible to do. The subsequent movement of the holding pin 30 is exactly the same as in FIGS. 8e to 8f, and the same reference numerals are given in the drawings, and the description thereof is omitted.

  FIG. 11 shows another embodiment of the slide rail unit of the present invention.

  In the embodiment shown in FIG. 1, the holding pin 30, the pin guide member 32, and the cam member 33 constituting the terminal biasing means 6 are provided directly to the outer rail 1 and the inner rail 2 of the slide rail unit. In the example shown in FIG. 11, the holding pin 30 and the pin guide member 32 are provided on the furniture body 50, and the cam member 33 is provided on the drawer 51, and is separated from the outer rail 1 or the inner rail 2. That is, when the drawer 51 is pulled into the furniture body 50 by the action of the slide rail unit, the cam member 33 provided in the drawer 51 engages with the holding pin 30 provided in the furniture body 50 and acts on the holding pin 30. The tensile force of the elastic member 31 acts on the drawer. Thus, when the holding pin 30 and the cam member 33 are provided separately from the outer rail 1 and the inner rail 2, the pulling force of the elastic member 31 is applied to the drawer 51 according to the mounting position of the cam member 33 with respect to the drawer 51, for example. Can be freely changed, and by changing the mounting position of the cam member, it can be flexibly applied to various applications.

  Moreover, FIG. 12 is a figure which shows the example which applied the slide rail unit of this invention to the sliding door.

  In this example, the outer rail 1 of the slide rail unit is fixed along the upper end side of the opening 70 of the building, while the sliding door 71 that closes the opening 70 is suspended from the inner rail 2. The outer rail 1 is provided with a pin guide member 32 corresponding to the end of the stroke range of the inner rail 2, and the inner rail 2 has a cam member 33 that engages with a holding pin 30 guided by the pin guide member 32. Is provided. That is, according to the example shown in FIG. 12, when the sliding door 71 is moved to the vicinity of the end of the stroke range of the slide rail unit, the sliding door 71 is automatically urged toward the end position, and at the end position. This is convenient when it is held and it is desired to lock the sliding door 71 in the open position or the closed position.

  In the slide rail unit shown in FIG. 1, the holding pin 30 is configured to operate when the inner rail 2 is pulled into the outer rail 1, but the mounting position and mounting direction of the pin guide member 32 and the cam member 33 are determined. By changing, it is also possible to configure the holding pin 30 to act when the inner rail 2 is pulled out from the outer rail 1.

  In the example shown in this embodiment, the pin guide member 32 is fixed to the outer rail 1 and the cam member 33 is fixed to the inner rail 2. However, the cam member 33 is fixed to the outer rail 1 and the pin guide member 32 is fixed to the inner rail 2. It is also possible to change the design so that is fixed.

  Furthermore, the present invention is applied between a pair of rails assembled so as to be movable with respect to each other. For example, when the slide rail unit is composed of three outer rails, a center rail, and an inner rail. The present invention can be applied to the outer rail and the center rail that are movable with respect to each other, and between the center rail and the inner rail.

  Furthermore, in the above-described embodiment, a large number of balls are interposed between the outer rail and the inner rail. However, the present invention is not limited to this as long as the inner rail can be movably supported with respect to the outer rail. For example, a wheel that travels on the outer rail may be rotatably attached to the inner rail, or a sliding surface that slides on the outer rail and the inner rail may be provided.

It is a perspective view which shows 1st Embodiment of the slide rail unit of this invention. It is a top view which shows a mode that the slide rail unit shown in FIG. 1 was applied to the slide mechanism of a drawer. It is front sectional drawing of the slide rail unit shown in FIG. It is a top view which shows the relationship between a holding pin, a pin guide member, and a cam member. It is a B arrow line view of FIG. 4a. It is C arrow line view of FIG. 4b. It is a disassembled perspective view which shows the relationship between a holding pin, a pin guide member, and an elastic member. It is front sectional drawing which shows the state in which the holding pin was inserted in the guide groove formed in the inner rail. It is explanatory drawing which shows order for the movement of the holding pin at the time of drawing in an inner rail to an outer rail. It is explanatory drawing which shows order for the movement of this holding pin at the time of returning a holding pin to a standby position. It is a top view which shows the other example of a cam member. It is explanatory drawing which shows order for the movement of this holding pin at the time of returning a holding pin to a standby position using the cam member shown in FIG. It is a perspective view which shows 2nd Embodiment of the slide rail unit of this invention. It is a perspective view which shows the example which applied the slide rail unit of this invention to the sliding door.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Outer rail, 2 ... Inner rail, 3 ... Ball, 30 ... Holding pin, 31 ... Elastic member, 32 ... Pin guide member, 33 ... Cam member, 60 ... Guide groove, 64 ... Guide groove

Claims (8)

A first rail, a second rail that is freely strokeable along the longitudinal direction of the first rail, and a biasing of the second rail toward the stroke end in the vicinity of the stroke end of the second rail And terminal urging means to
The end biasing means is a holding pin that is erected so as to be movable in the longitudinal direction and the width direction with respect to the first rail, and an elasticity that constantly biases the holding pin toward the stroke end of the second rail. And a holding pin that is provided on the first rail and is held at a standby position away from the stroke end against the biasing force of the elastic member, and the holding pin released from the standby position is attached to the first rail. A pin guide member that is guided toward the stroke end in accordance with the force, and a second guide rail that is provided on the second rail and causes the holding pin to be removed from the standby position of the pin guide member as it overlaps with the pin guide member. A slide rail unit with a holding function, comprising a cam member for locking the holding pin. The pin guide member includes a guide groove in which a tip of the holding pin is loosely fitted, and is fixed to the first rail. The guide groove has a locking recess corresponding to the standby position, and from the locking recess. The slide rail unit with a holding function according to claim 1, further comprising a pulling guide portion for guiding the detached holding pin in the longitudinal direction of the first rail. 3. The slide rail unit with a holding function according to claim 2, wherein the holding pin is sandwiched between the pin guide member and the first rail and is movably held. The cam member includes a guide groove for receiving the tip of the holding pin and is fixed to the second rail. The guide groove moves the holding pin set at the standby position as the second rail moves. It comprises an introduction part for receiving, an action part for moving the received holding pin in the width direction of the first rail to leave the standby position, and a pin detaining part for locking the holding pin that has passed through this action part. The slide rail unit with a holding function according to claim 1, wherein the slide rail unit has a holding function. The retracting recess for allowing the cam member to enter while the holding pin is set at the position is formed at one end of the pin guiding member on the opposite side to the locking recess of the guiding groove. Item 3. A slide rail unit according to item 2. The slide rail unit according to claim 4, wherein a pin recovery portion for returning the holding pin to the standby position is formed between the guide groove introduction portion and the action portion of the cam member. A terminal urging means for urging the movable member toward the terminal direction at the end of its forward and backward movement, wherein the movable member is used together with a slide mechanism capable of moving back and forth along a predetermined direction;
The terminal urging means includes a holding pin erected so as to be movable in the longitudinal direction and the width direction with respect to the fixed member, and an elastic member that constantly urges the holding pin toward the stroke end of the movable member; The holding pin is provided in the fixing member, and the holding pin is locked at the standby position away from the stroke end against the biasing force of the elastic member, and the holding pin detached from the standby position is accompanied by the biasing force. A pin guide member that guides toward the end of the stroke, and a pin guide member that is provided on the movable member, and that disengages the holding pin from the standby position of the pin guide member as it overlaps the pin guide member, and locks the holding pin after release And an end biasing mechanism for the slide mechanism. The cam member includes a guide groove that receives a tip of the holding pin and is fixed to the movable member, and the guide groove includes an introduction portion that receives the holding pin set at the standby position as the movable member moves. And an action part for moving the received holding pin in the width direction of the fixing member to disengage from the standby position and a pin detaining part for locking the holding pin that has passed through the action part. The end biasing mechanism of the slide mechanism according to claim 7.

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