JP4969125B2 - Automatic slide device for movable body - Google Patents

Description

  The present invention relates to an automatic slide device for a movable body such as a drawer.

2. Description of the Related Art Conventionally, there is a furniture provided with a drawer such as a furniture that can be automatically closed using a spring when the drawer is closed (see, for example, Patent Document 1). Furthermore, there has been a device provided with a damper (buffer device) to soften the closing operation process when closing (see, for example, Patent Document 2).
Japanese Patent Publication No. 5-23763 JP 2001-245738 A

  However, in the thing of the said patent document 1, when a drawer is closed, it can be automatically pulled in with a spring, but since there is no damper mechanism, a drawer moves to a closing position vigorously, for example, the noise by an impact arises. There is a problem. On the other hand, according to the thing of the said patent document 2, since the damper is provided, the said noise can be prevented, but since the damper is acting until the drawer reaches the closed position in the description of the specification. The braking force is always applied with a strong force. Therefore, since a spring that exerts a strong pulling force that is greater than the braking force of the damper is required, there has been a problem that the apparatus is soared that the spring is enlarged and the rigidity is unnecessarily increased.

  There is a paper feed tray such as a copying machine as a drawer structure. When the automatic pull-in structure is applied to the paper feed tray, the paper feed tray is required to be completely stored, so that the spring is strong enough to be surely positioned at a predetermined position when the paper feed tray is fully stored. It is necessary to pull in with force. Even in that case, the spring of Patent Document 2 requires a stronger spring force.

A solution that solves these problems and realizes a soft slide with a buffering action when the movable body is automatically slid by a bullet biasing force, and a sufficiently strong force that is not affected by the braking force that accompanies the buffering action In the present invention, in order to realize that the movable body is slidable and reciprocally movable toward one end of the slide range, at least one end of the slide range is slid. An automatic sliding device for a movable body for automatically sliding from the vicinity to the one end, and when the movable body is slid toward the one end, the movable body and the movable body from the predetermined position to the one end An engaging member that is displaced as the movable body slides so that the movable body is detached from the predetermined position when engaged and slid in the opposite direction; A bullet urging means for urging and urging the engagement member in a direction to slide the movable body to the one end, and a buffer to the vicinity of the one end when the movable body is slid by the bullet urging force. possess a cushioning device for causing action, the engagement member, and the arm member swingably supported to the main body side, predetermined so that the movable body and disengaged in response to the slide rotatably the rotary member and said supported on the arm member in a range and shall be perforated.

In particular, prior Symbol resilient biasing means, interposed the rotating body between said body and said rotating body so as to resiliently urging in the direction to rotate toward that holds the engagement state between the movable body It is preferable to have a spring that has been made.

  The rotating body is provided with a guide shaft that is parallel to the rotation axis thereof, and a first guide groove that guides the guide shaft within the predetermined rotation range of the rotating body is provided on the main body side. Good to be. In addition, a second guide groove that is continuous with the first guide groove so as to guide the rotor on the rotation locus of the arm member integrally with the arm member after rotating the rotating body within the predetermined rotation range. It should be provided. Further, at least two engaging convex portions are provided side by side in the sliding direction on one of the movable body and the rotating body, and a plurality of engaging pieces that can be engaged with the engaging convex portions are provided on the other side. Good to be. The shock absorber may be provided between the arm member and the rotating body.

  Further, the shock absorber comprises a rotary damper, a gear is provided on the rotary shaft of the rotary damper, and a sector gear that meshes with the gear is provided on one of the arm member and the rotary body. The body may be supported on the other of the arm member and the rotating body. The spring may be provided between the rotating body and the main body so that the arm member is elastically pressed against both ends of the swing range. The movable body may be a drawer that can be moved in and out of the main body. Furthermore, the drawer body may be a paper feed tray of a copying machine.

  As described above, according to the present invention, when the movable body is automatically slid to one end side of the slide range by the elastic biasing force, the buffering action is generated from the predetermined position to the vicinity of the one end. In addition, it is possible to prevent the impact and noise from being generated, and it is possible to prevent a load from being applied by the shock absorber from the vicinity of one end to the other end. In this state, the movable body can be slid to the final position that is one end of the slide range. Accordingly, since the movable body can be slid reliably to the final position without increasing the bullet urging force of the bullet urging means so much, for example, when a spring is used as the bullet urging means, a large one is used. Therefore, the apparatus can be made compact and inexpensive.

  In particular, by using a rotating body and an arm member to rotate the rotating body with respect to the arm member, a buffering action is generated. From the vicinity of one end to the other end by moving the arm member together and swinging the arm member By sliding, it is possible to prevent a buffering action between them, and the above action can be realized with a simple structure. Further, by providing a spring that elastically biases the rotating body in the direction of rotating the rotating body in the direction of maintaining the engaged state with the movable body, the engaged state between the rotating body and the movable body is released when sliding by the spring. There is no fear.

  Further, by providing a first guide groove for guiding the rotation of the rotating body and a second guide groove for guiding the rotation of the arm member after being integrated with the arm member, the rotating body and the arm member are provided. Rotational motion can be ensured. In addition, since the plurality of engagement convex portions and the plurality of engagement pieces are provided in the engagement between the movable body and the rotating body, the engagement state associated with the rotation of the rotating body is continuously performed. The diameter of the rotating body can be reduced, and the entire apparatus can be made compact. Further, since the shock absorber is provided between the rotating body and the arm member, the shock absorber can be accommodated within the rotation range of the rotating body and the arm member, and unnecessary enlargement of the entire apparatus can be prevented. . Since the shock absorber is a rotary damper, a shock absorbing action associated with the rotation of the rotating body can be suitably realized. Further, by providing a spring so as to press the arm member at both ends of the swing end of the arm member, the arm member is stably held at each position. In addition, the use of the movable body as a drawer has a great effect in the pull-in operation of the drawer.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a main part showing a paper feed tray portion of a copying machine to which the present invention is applied.

  A sheet feeding tray 1 as a movable body is slidably supported by a rectangular dish-like casing 2 fixed inside a copying machine main body as a main body, and reciprocates as indicated by arrows A and B in FIG. Provided to get. Therefore, the paper feed tray 1 can take the state shown in FIG. 1 where it is completely stored and the state where it is pulled out of the copying machine main body in the direction indicated by the arrow B. A striker 3 constituting an engaging member is integrally attached to one of the left and right side walls extending in the sliding direction of the paper feed tray 1.

  The casing 2 is provided with a positioning projection 2a for positioning the paper feed tray 1 in the fully stowed state shown in the figure when the paper feed tray 1 is slid in the stowing direction. An automatic pull-in unit 4 constituting an automatic slide device is integrally attached to a side wall of the casing 2 corresponding to the striker 3.

  Next, the automatic retracting unit 4 will be described below with reference to FIGS. The automatic pull-in unit 4 is a rectangular box shape fixed to the copying machine main body, and is configured by assembling each part into a case 5 having an open upper surface. The vertical relationship is based on the state of FIG. A lid 6 is attached to the upper surface of the case 5, and the side surface facing the striker 3 is open in a state where the case 5 and the lid 6 are integrated.

  A pivot shaft 5a is projected at a predetermined position on the bottom surface of the case 5, and an arm member 7 constituting an engaging member is pivotally supported on the pivot shaft 5a. The arm member 7 includes a damper accommodating portion 8 that is recessed in an arc-shaped oval shape, a branch portion 9 that extends laterally from an intermediate portion of the arm member 7, and a rotation axis of the arm member 7. A projecting boss-like rotation support shaft 10 is formed by integral molding at a predetermined radius from a pivot hole 7a supported by the pivot shaft 5a.

  The damper accommodating portion 8 accommodates a rotary damper 11 as a shock absorber. The rotary damper 11 includes, for example, a large-diameter gear 11a that forms a body filled with oil, and a small-diameter gear 11b that integrally includes a vane that is coaxially and relatively rotatably received by the large-diameter gear 11a. The vane rotating integrally with the small diameter gear 11b may be provided with an orifice structure. The depth of the damper accommodating portion 8 is substantially the same as the axial thickness of the large diameter gear 11a, and the small diameter gear 11b is exposed to the outside of the damper accommodating portion 8 in the accommodated state.

  In addition, a cylindrical protrusion 11c is provided on the lower surface of the large-diameter gear 11a so as to protrude coaxially downward, and an arc-shaped slot 8a for guiding the protrusion 11c is provided on the bottom wall of the damper accommodating portion 8. It has been. The center of curvature of the arc-shaped slot 8a is the rotation support shaft 10, and the rotary damper 11 is guided by the arc-shaped slot 8a and can move in the longitudinal direction of the damper accommodating portion 8 by a predetermined amount. A plurality of locking teeth 8b that mesh with the large-diameter gear 11b are provided at a position that is a part of the inner peripheral surface of the damper accommodating portion 8 and that is the lower end in FIG.

  A flat rotating body 12 constituting an engaging member is rotatably supported on the rotation support shaft 10 of the arm member 7. An inner tooth sector gear 13 formed in an arc shape and three levers 14 a, 14 b, and 14 c as engaging pieces extending outward in the radial direction are supported on the rotating support shaft 10 on the rotating body 12. The pivot support holes 12a are integrally formed at predetermined radiuses. The center of curvature of the sector gear 13 is the pivot hole 12a. Further, on the upper surface of the rotating body 12, a shaft-shaped spring locking projection 15 having an enlarged head and a boss-shaped guide shaft 16 are integrally formed at respective predetermined radii from the pivot hole 12a. Is formed.

  The lid body 6 is formed with a guide groove 17 formed of a curved slot for guiding the guide shaft 16 and a support hole 6a for supporting the upper end portion of the pivot shaft 5a when the lid body 6 is attached. ing. The guide groove 17 includes a first guide groove 17a formed with a predetermined radius of curvature and an angle range centered on the pivot support hole 12a, a predetermined guide centered on the support hole 6a and continuous with the first guide groove 17a. And a second guide groove 17b formed with a radius of curvature and an angular range of.

  One end of a first coil spring 18 is connected to the branch portion 9 of the arm member 7 through a locking hole provided at a predetermined position. One end of the second coil spring 19 is connected to the spring locking projection 15 of the rotating body 12. The other ends of the coil springs 18 and 19 are connected to predetermined positions of the case 5 as shown in FIG.

  Further, as shown in FIG. 3, the striker 3 integrally has two pins 3 a and 3 b as engaging convex portions arranged at a predetermined interval in the sliding direction of the paper feed tray 1 (arrow A in the figure). Have. The number of pins 3a and 3b is not limited to two, and may be three or more according to the number and shape of levers 14a to 14c in the illustrated example of the rotating body 12.

  An automatic slide procedure of the paper feed tray 1 by the automatic pull-in unit 4 and the striker 3 configured as described above will be described below. The case where the paper feed tray 1 is pulled out from the fully accommodated state in the casing 2 as shown in FIG. 1 will be described with reference to FIGS.

  FIG. 3 is a main part plan view showing the positional relationship between the automatic pull-in unit 4 and the striker 3 in the fully accommodated state of the paper feed tray 1 as described above. In this state, the arm member 7 and the rotating body 12 are elastically biased toward the side indicated by the arrow A by the coil springs 18 and 19, respectively. The arm member 7 is restricted from rotating further by the branch portion 9 coming into contact with the stopper 5b projecting from the bottom surface of the case 5, and the rotating body 12 has the paper feed tray 1 mounted on the positioning convex portion 2a. Further contact with the pin 3a and the lever 14a engaging with the pin 3a are restricted from further rotation. In this way, the sheet feeding tray 1 is positioned in the fully stored state.

  When the sheet feeding tray 1 is pulled out in the pulling direction indicated by the arrow B against the elastic biasing force of the coil springs 18 and 19 from the state of FIG. 3, the rotating body 12 is moved by the engagement between the pin 3a and the lever 14a. It rotates in the direction shown by arrow C in the figure. In the movement of the rotating body 12 at this time, the guide shaft 16 is guided by the second guide groove 17b of the guide groove 17, so that the circular motion about the pivot shaft 5a is obtained. Therefore, since the arm member 7 also moves integrally with the rotating body 12 due to the connection state of the rotation support shaft 10 and the arm member 7 and the engagement state of the sector gear 13 and the small diameter gear 11b, the state shown in FIG. Become. FIG. 4 shows a state in which the guide shaft 16 is located at a branch point between the first guide groove 17a and the second guide groove 17b.

  When the paper feed tray 1 is further pulled out from the state of FIG. 4, the lever 14a is further pushed out by the pin 3a and rotates to the side indicated by the arrow C. Then, since the guide shaft 16 is guided by the first guide groove 17a from the state of FIG. 4, the rotating body 12 starts to rotate in the direction indicated by the arrow D in FIG. During the transition from the state of FIG. 4 to FIG. 5, the engagement of the one pin 3a with the lever 14a is released, but the other pin 3b starts to engage with the lever 14b. The rotating body 12 can be rotated in the direction of arrow D.

  Further, due to the meshing state of the sect gear 13 and the small-diameter gear 11 b, the rotary damper 11 can also move in the housing portion 8 as the rotating body 12 rotates. At this time, the meshing between the large-diameter gear 11a and the locking teeth 8b is released, and the other part of the peripheral wall surface of the main part is formed on a smooth surface, so that the rotary damper 11 can freely rotate as a whole, There is no action, and there is no resistance against the pulling force of the paper feed tray 1.

  Further, when the paper feed tray 1 is pulled out, the pin 3b is also detached from the lever 14b (FIG. 6). For example, the paper feed tray 1 is pulled out to a position where the pull-out amount is necessary for paper refilling, etc. I do. During the state shown in FIGS. 5 to 6, the axis of the coil spring 19 exceeds the axis of the rotation support shaft 10 and becomes the state shown in FIG. 6. In the state of FIG. 6, the coil springs 18 and 19 are positioned on both sides of the rotation support shaft 10, and the elastic urging directions of both are opposite to the rotation support shaft 10. In this state, by setting the spring characteristics of the coil spring 19 with respect to the rotating body 12 so that the moment in the direction of the arrow D by the coil spring 19 is larger than the moment in the opposite direction by the coil spring 18. The state of FIG. 6 is maintained.

  5 to 6, since the rotating body 12 can rotate around the rotation support shaft 10, the small-diameter gear 11 b is rotated by the sector gear 13. However, as described above, the large-diameter gear 11 a functions as the housing portion 8. Therefore, the rotary damper 11 only rotates as a whole.

  Next, a case where the paper feed tray 1 is accommodated in the casing 2 will be described. Note that this accommodating operation is basically the operation from FIG. 6 to FIG. 7 through to FIG. 4 and FIG. 3, and unless otherwise specified, the detailed description of the part that is in the opposite direction and performs the same operation is as follows. Omitted.

  By returning the paper feed tray 1 toward the casing 2, the state shown in FIG. 6 is obtained, and the pin 3b engages with the lever 14c. Further, when the sheet feeding tray 1 is pushed in the direction indicated by the arrow A in the figure, the rotating body 12 is rotated in the engaged state. The pushing force at this time may be an elastic urging force of the coil spring 19 and may be against a larger amount than the coil spring 18 and does not feel a large resistance.

  As described above, when the axial line of the coil spring 19 moves to the same side as the coil spring 18 beyond the rotation support shaft 10 as described above, the elastic urging forces of both the coil springs 18 and 19 cooperate. This acts in a direction to rotate the rotating body 12 in the direction indicated by the arrow E. When this happens, the rotating body 12 is automatically rotated by the elastic urging force of the two coil springs 18 and 19, thereby moving the pin 3 b so that the paper feed tray 1 is completely used as one end of its sliding range. It can be automatically slid toward the storage position. The bullet energizing direction is a direction that ensures the engagement of the rotating body 12, that is, the levers 14a and 14b with the pins 3a and 3b, and the engaged state is stabilized.

  At this time, as soon as the axis of the coil spring 19 exceeds the rotation support shaft 10, the rotation damper 11 reaches the locking teeth 8b as shown in FIG. 7, and thereafter, the rotation of the large-diameter gear 11a is stopped. When the sector gear 13 is displaced along with the rotation of the body 12, the small diameter gear 11b is rotated to cause a buffering action on the rotary damper 11. Accordingly, in the period from FIG. 7 to FIG. 4, the paper feed tray 1 can be pulled in by a soft operation with an appropriate buffering action against the elastic urging force of the two coil springs 18 and 19 (FIG. 8). Damping stroke range).

  Then, from the state of FIG. 4 as the vicinity of the complete storage position, the guide shaft 16 moves to the first guide groove 17a, so that the rotating body 12 moves around the pivot shaft 5a in the direction indicated by the arrow F in the figure. As a result, the relative rotation between the rotating body 12 and the arm member 7 is prevented, so that both move together. Accordingly, since the rotary damper 11 does not produce a buffering action from FIG. 4 to FIG. 3, the load due to the buffering action is eliminated, and the paper feed tray 1 can be pulled in by a strong elastic biasing force by the two coil springs 18 and 19. Yes (high load pull-in stroke range in FIG. 8). As a result, the paper feed tray 1 can be pulled into the complete storage position with a strong force, and the paper feed tray 1 can be reliably stored in the complete storage position.

  In the illustrated example, the striker 3 is provided on the paper feed tray 1 side, and the drawing unit 4 is provided on the casing 2 side that is the copying machine main body side. However, the reverse configuration is also possible. In the illustrated example, the operation is applied to the operation of a general paper feed tray of the copying machine. The paper feed tray 1 is manually pushed to some extent and then the automatic pull-in operation is performed. For example, the automatic pull-in operation may be performed with the entire stroke.

  The automatic slide device for a movable body according to the present invention can automatically slide the movable body with a soft feeling with a buffering action and can slide with a strong force when reaching the final position. The present invention is not limited to the paper tray, and can be applied to all drawer structures including an open / close lid.

1 is a perspective view of a main part showing a paper feed tray portion of a copying machine to which the present invention is applied. It is a disassembled perspective view of an automatic pull-in unit. It is a principal part top view which shows the automatic drawing-in unit and striker corresponding to the perfect storage state of a paper feed tray. FIG. 4 is a diagram corresponding to FIG. 3 showing a state in which the paper feed tray has started to be pulled out. FIG. 4 is a diagram corresponding to FIG. 3 illustrating a state in which the paper feed tray is further pulled out. It is a figure corresponding to FIG. 3 which shows the state which the striker removed. FIG. 6 is a view corresponding to FIG. 5 when a paper feed tray is pulled in. It is a figure which shows the change of the drawing load of a paper feed tray.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Paper feed tray 2 Casing 3 Striker 3a * 3b Pin 4 Automatic drawing unit 7 Arm member 8 Damper accommodating part 11 Rotation damper 12 Rotating body 14a * 14b * 14c Lever 17 Guide groove, 17a First guide groove, 17b 2nd Guide groove 18/19 Coil spring

Claims (8)

An automatic slide device for a movable body that automatically slides at least from the vicinity of the one end to the one end when a movable body that is slidable and reciprocally movable on the main body is slid toward one end of the slide range. Because
When the movable body is slid toward the one end, it engages with the movable body from the predetermined position to the one end and when it is slid in the opposite direction, the movable body is detached from the predetermined position. An engagement member that displaces as the movable body slides, a bullet urging means that urges the engagement member in a direction to slide the movable body to the one end, and the movable body. possess a cushioning device for causing a buffering effect to the vicinity of the one end when sliding by the biasing resilient force,
The engaging member is supported by the arm member so as to be swingable on the main body side and rotatably by a predetermined range so as to be disengaged from the movable body according to the slide. automatic sliding device of the movable body, characterized in that have a rotating body.   A spring interposed between the rotating body and the main body so that the bullet urging means urges and urges the rotating body in a direction to rotate the rotating body in a direction to maintain the engaged state with the movable body; The automatic slide device for a movable body according to claim 1, comprising:   A guide shaft that is parallel to the rotation axis of the rotating body projects from the rotating body, and a first guide groove that guides the guide shaft in the predetermined rotation range of the rotating body is provided on the main body side. The automatic slide device for a movable body according to claim 2.   A second guide groove that is continuous with the first guide groove is provided so as to guide the rotor on the rotation locus of the arm member integrally with the arm member after rotating the rotating body within the predetermined rotation range. The automatic slide device for a movable body according to claim 3, wherein the automatic slide device is a movable body.   At least two engaging projections are provided side by side in the sliding direction on one of the movable body and the rotating body, and a plurality of engagement pieces that can engage with the engaging projection are provided on the other. The automatic slide device for a movable body according to claim 1, wherein:   6. The automatic slide device for a movable body according to claim 1, wherein the shock absorber is provided between the arm member and the rotating body. The shock absorber comprises a rotary damper;
A gear is provided on the rotating shaft of the rotary damper, and a sector gear that meshes with the gear is provided on one of the arm member and the rotating body,
The movable body automatic slide device according to any one of claims 1 to 6, wherein a body of the rotary damper is supported by the other of the arm member and the rotary body.   The said spring is provided between the said rotary body and the said main body so that it may become the direction in which the said arm member is each elastically pressed to the both ends of the said rocking | fluctuation range, The thru | or 2 characterized by the above-mentioned. The automatic slide device for a movable body according to claim 7.

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