JP5586987B2 - Buffer / closing device for drawer - Google Patents

Description

  The present invention relates to a buffer / closure device for drawers, and more particularly to a buffer / close device for drawers used for drawers such as office desks and system kitchens.

  Conventionally, as a buffering and closing device for drawers used for drawers such as office desks and system kitchens, a rotary damper that brakes relative movement of locking members arranged on the drawer body side and the drawer storage part side is a main component. Have been proposed (see, for example, Patent Document 1).

  As the rotary damper used in this drawer buffer / closure device, an oil-type rotary damper filled with oil is widely used. For this reason, the seal member deteriorates over many years, and the internal oil leaks out. There was a problem that documents and valuable decorations in the drawer could be soiled.

  In order to cope with such a problem, a buffering / closing device for withdrawal using an air damper that uses air as a working fluid has been proposed (for example, see Patent Document 2).

  By the way, this drawer buffering / closing device is provided at the time of the closing operation of the first locking member disposed on the drawer housing portion side and the drawer locked to the first locking member via the locking member. And a damper / closing mechanism provided with a damper member for applying a buffering force and a biasing means for applying a biasing force in the closing direction, and a first locking member of the buffering / closing mechanism disposed on the drawer side. The first locking member is buffered and closed in a state where the first locking member and the second locking member are engaged with each other when the drawer is opened. The mechanism body is moved from the first position to the second position, the engagement is released, and the first locking member is stopped at the position. The second locking member is engaged with the first locking member stopped at the second position of the main body, Locking member is to move from the second position of the damping and closing mechanism body in the first position.

More specifically, as shown in FIG. 10, the buffer / closing device 60 for drawer has a decorative plate 71 on the front side, side plates 72 and 72 on both sides, a back plate 73 on the back side, and a bottom plate 74 on the bottom side. The drawer 70 is attached to a drawer storage portion 75 formed on a desk or furniture for storing the drawer 70, and the first locking member 62 and the first locking member 62 are connected to the drawer storage portion 75 side. A damper / closing mechanism 61 having a damper member 64 for applying a buffering force to the drawer 70 and a biasing means 65 for applying a biasing force in the closing direction when the drawer 70 engaged through the engaging member 66 is closed is disposed. The second locking member 63 that engages with the first locking member 62 of the buffering / closing mechanism 61 is disposed on the drawer 70 side.
As is well known, the guide roller (not shown) disposed in the drawer 70 is guided by a fixed rail 77 disposed in the drawer housing portion 75 and the guide roller disposed at the tip of the fixed rail 77, as is well known. (Not shown) is guided by the movable rail 76 disposed in the drawer 70 to be opened and closed.

The first locking member 62 travels in the main body 67 of the buffering / closing mechanism 61 along a guide groove 68 in which the inlet side (left side in the figure) opened to the main body 67 is bent stepwise obliquely downward. The first guide pin 62c and the second guide pin 62d are formed so as to protrude apart from each other, and the first contact piece 62a and the second contact piece 62a that engage with the second locking member 63 are formed on the upper part. The abutting piece 62b protrudes from the main body 67 of the buffering / closing mechanism 61.
The damper member 64 that applies a buffering force to the drawer 70 during the closing operation of the drawer 70 is engaged with the first locking member 62 so that the first locking member 62 can swing through the engaging member 66. Thus, sufficient resistance is given when the first locking member 62 moves to the back side (right side in the figure).
The biasing means 65 disposed in the main body 67 of the buffering / closing mechanism 61 is constituted by a tension spring having one end engaged in the main body 67 and the other end engaged with the first locking member 62. However, the first locking member 62 is always urged toward the back side (right side in the figure) of the main body 67.

Here, when the first locking member 62 is moved to the inlet side (the left side in the figure), the first guide pin 62c is positioned at the lower end 68b of the bent guide groove 68, and the first guide pin 62c The separated second guide pin 62d is positioned in the horizontal portion 68a of the guide groove 68, the first contact piece 62a is buried in the main body 67, and only the second contact piece 62b is the main body 67. (See the two-dot chain line).
In this state, although the first locking member 62 is urged to the back side by the urging means 65, the first guide pin 62c is engaged with the lower end portion 68b of the bent guide groove 68. In this state, the first locking member 62 is maintained in a stopped state. In this state, the second locking member 63 disposed on the drawer 70 is provided on the second contact piece 62b protruding from the main body 67. When the first locking member 62 is pressed toward the back side of the drawer storage portion 75, the engagement of the first guide pin 62c is released, and the first contact piece 62a protrudes from the main body 67, Even if the movement of the drawer 70 to the back side of the drawer housing portion 75 is stopped, the first abutting piece 62a is engaged with the second locking member 63 and the drawer 70 is pulled by the biasing force of the biasing means 65. Move to the closed position.
At this time, the movement of the drawer 70 is a slow movement by the damper member 64 that applies a buffering force to the drawer 70 during the closing operation.

By the way, in the conventional buffer / close device for drawers, the first locking member 62 swings in the vertical plane. Therefore, when the drawer 70 is closed, the drawer 70 and the drawer storage are closed. There is a problem that the second locking member 63 may not be engaged with the first locking member 62 when the drawer 70 is displaced in the width direction due to the clearance in the width direction with the portion 75.
In addition, when the first locking member 62 is independently operated due to a malfunction and is disengaged from the lower end portion 68b of the guide groove 68 and moved to the back side of the drawer storage portion 75, the drawer 70 is closed. Even if the second locking member 63 is moved to the closed position, the second locking member 63 abuts against the inlet side (left side in the figure) of the first contact piece 62a of the first locking member 62 and does not completely close. If the drawer 70 is forcibly closed, the first locking member 62 may be damaged. In order to return to the normal use state, the one end drawer 70 is removed from the drawer storage portion 75 and the first engagement member 62 is removed. It was necessary to move the stop member 62 to the second position.

JP 2005-204790 A JP 2009-32206 A

In view of the problems of the above-described conventional buffer / closure device for drawer, the present invention ensures that the locking members are engaged with each other even when the drawer is displaced in the width direction during the closing operation of the drawer. It is a first object of the present invention to provide a buffering / closing device for drawers that can cushion the impacts of the drawers and move the drawers to a completely closed position.
In addition, even if the locking member provided in the drawer storage part moves to the back side of the drawer storage part due to malfunction, the drawer can be returned to the normal use state without removing the drawer from the drawer storage part. A second object is to provide a shock absorbing and closing device for use.

In order to achieve the first object, a buffering / closing device for drawer according to the present invention includes a first locking member disposed on a side wall of a drawer housing portion and a locking member on the first locking member. A damper member for applying a buffering force to the drawer during the closing operation of the drawer engaged through the buffering and closing mechanism including an urging means for applying an urging force in the closing direction, and the buffering and closing mechanism disposed on the drawer side. A second locking member that engages with the first locking member of the closing mechanism, and the first locking member and the second locking member are engaged with each other when the drawer is opened. The first locking member is moved from the first position to the second position of the main body of the buffering / closing mechanism so that the engagement is released, and the first locking member stops at the position. The first lock is stopped at the second position of the main body of the buffer / closing mechanism when the drawer is closed The second locking member engages the timber, the drawer damping and closing apparatus that is the second engaging member moves from the second position of the body of the damping and closing mechanism in the first position, The second locking member is attached to the outer side surface of the back plate on the back side of the drawer, and the first locking member is disposed on the engaging member so as to be swingable in a horizontal plane. , located on the rear side of the drawer during opening movement of the drawer, a first contact piece and the second locking member is engaged, is located on the rear side of the drawer during the closing operation of the drawer, the second A second abutting piece with which the two locking members engage, and a body of the buffering / closing mechanism that swings at a position where the first locking member has been moved to the second position of the body of the buffering / closing mechanism. And a third abutting piece that abuts on and stops.

  In order to achieve the second object, the first position of the buffering / closing mechanism main body alone is caused by the malfunction of the first locking member on the first contact piece of the first locking member. When the drawer is closed, the second locking member gets over the first abutting piece, and is provided while the first abutting piece and the second abutting piece face each other. A first guide portion can be formed so as to be guided by the groove portion.

  In addition, when the drawer is closed, the second contact member faces the second contact piece of the first lock member, and the first contact piece and the second contact piece face each other. A second guide portion can be formed so as to be guided by a groove portion provided therebetween.

  Further, the first locking member is formed symmetrically in the vertical direction, and is detachably disposed on the engaging member, and the first locking member is reversed and attached, thereby providing a buffering / closing mechanism. The protruding direction of the first contact piece and the second contact piece of the first locking member with respect to the main body can be changed.

  According to the drawer buffer / closure device of the present invention, the first locking member is disposed on the main body portion, which is disposed on the engaging member so as to be swingable in a horizontal plane, when the drawer is opened. The first contact piece with which the locking member engages, the second contact piece with which the second locking member engages when the drawer is closed, and the first locking member is buffered and closed. By providing a third abutting piece that swings at a position moved to the second position of the mechanism main body and abuts against the buffer / closure mechanism main body and stops, the first locking member and the first The engagement range of the two locking members can be increased in the width direction of the drawer, and the locking members can be reliably engaged even when the drawer is displaced in the width direction when the drawer is closed. This will cushion the impact when closing and move the drawer to the fully closed position It can be.

  Further, when the first locking member is moved to the first position of the buffer / closing mechanism main body alone due to a malfunction by the first abutting piece of the first locking member, the drawer is closed. The first locking member moves over the first contact piece and is guided to a groove provided while the first contact piece and the second contact piece face each other. By forming the guide portion, the first locking member is manually moved to the second position even when the first locking member is moved to the first position of the buffering / closing mechanism main body alone due to malfunction. It is possible to restore the normal use state by simply moving the drawer to the closed position without moving it to the normal position, so that even ordinary users can easily recover from malfunctions without any trouble. Can do.

  Further, when the drawer is closed, the second locking member faces the second contact piece of the first locking member while the first contact piece and the second contact piece face each other. By forming the second guide portion that is guided by the groove portion provided in the second portion, even when the amount of movement when the drawer is displaced in the width direction is large during the opening / closing operation of the drawer, the second guide portion is provided. The locking member is surely guided to the groove portion by the second guide portion, and the first locking member and the second locking member can be reliably engaged.

  Further, the first locking member is formed symmetrically in the vertical direction, and is detachably disposed on the engaging member, and the first locking member is reversed and attached, thereby providing a buffer / closing mechanism main body. By making it possible to change the protruding direction of the first contact piece and the second contact piece of the first locking member with respect to the drawer, the drawer buffer / A closure device can be applied.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of a buffer / close device for drawer according to the present invention, in which (a) is a bottom view of a partially cut section showing a closed state of a drawer, and (b) is an XX sectional view of (a). . The main parts of the buffer / closing device for drawer are shown, (a) is a perspective view of the first locking member, (b) is a perspective view of the second locking member, and (c) is a buffering / closing mechanism. It is a perspective view which shows the method to attach the 1st latching member, engaging member, damper member (air damper), and urging | biasing means which comprise to a buffering / closing mechanism main body. An example of the air damper used for the buffering / closing mechanism of the buffering / closing device for the drawer is shown, (a) is a front view of a partial cross section, (b) is a YY cross sectional view of (a). The piston of the air damper is shown, (a) is a partially cutaway front view, and (b) is a front view showing an example of a divided structure. The sealing member attached to the piston is shown, (a) is a front view, (b) is a side view on the piston rod side, (c) is a ZZ cross-sectional view of (a), and (d) is W of (b). It is -W sectional drawing. It is a partially cutaway front view which shows the state which attached the seal member to the same piston. It is a front view of a partially cut cross section for explaining the operation of the air damper. (A) is a state where the piston is moved to the cylinder closed end side (a state when the piston is contracted), and (b) is a state where the piston is moved. The state of moving to the cylinder open end side (the state when the cylinder is extended) is shown. The drawer buffer and closing device of the present invention is shown to be attached to the drawer and the drawer storage portion, (a) is a plan view of a partial cross section, (b) is a cross-sectional view taken along a line T-T of (a). It is. It is a bottom view of a partly cut cross section for explaining the operation of the buffer / close device for drawer, and (a) is a state in which the drawer is closed (the first locking member is the first of the buffer / close mechanism main body). (B) is a state where the drawer is moved to the open side, (c) is a state where the drawer is moved to the open side, and the first locking member and the second locking member are The state where the engagement is released (the state where the first locking member is located at the second position of the buffering / closing mechanism main body) is shown. It is the schematic which shows the conventional buffering / closing apparatus for drawer | drawings, (a) is a partial top view, (b) is VV sectional drawing of (a), (c) is the buffering / closing apparatus for drawers It is a front sectional view of a buffering and closing mechanism used for the.

  Embodiments of the buffer / closing device for drawer according to the present invention will be described below with reference to the drawings.

1 to 9 show an embodiment of the buffer / closing device for drawer according to the present invention.
The drawer buffering / closing device 1 includes a first locking member 20 disposed on the drawer housing portion 75 side, and a drawer 70 engaged with the first locking member 20 via an engagement member 26. A damper / closing mechanism 2 having a damper member 4 for applying a buffering force to the drawer during the closing operation and an urging means 25 for applying an urging force in the closing direction, and a first buffer / closing mechanism disposed on the drawer side. The second locking member 3 that engages with the locking member 20, and when the drawer 70 is opened, the first locking member 20 and the second locking member 3 are engaged, The first locking member 20 moves from the first position 27A to the second position 27B of the main body 27 of the buffering / closing mechanism 2, and the engagement is released. At this position, the first locking member 20 is released. Is stopped, and when the drawer 70 is closed, the body 27 of the buffer / closing mechanism 2 The second locking member 3 is engaged with the first locking member 20 stopped at the second position 27B, and the second locking member 3 is the second position of the main body 27 of the buffering / closing mechanism 2. 27B is moved to the first position 27A.
When the drawer 70 is opened, the first locking member 20 is engaged with the main body portion 21 that is disposed on the engaging member 26 so as to be swingable in a horizontal plane. 1, the second abutting piece 23 with which the second locking member 3 engages when the drawer 70 is closed, and the first locking member 20 with respect to the body of the buffering / closing mechanism 2. And a third abutting piece 24 that swings at the position moved to the second position 27B and abuts against the main body 27 of the buffering / closing mechanism 2 and stops.

As shown in FIGS. 1 to 2, the shock-absorbing / closing mechanism 2 is divided into a rectangular main body 27 having a split structure and having a hollow inside, and a damper member 4 that imparts a buffering force to the drawer 70 when the drawer 70 is closed. An urging means 25 for applying an urging force in the closing direction and an engaging member 26 are provided.
The damper member 4 is not particularly limited as long as it applies a buffering force to the drawer 70 when the drawer 70 is closed, but in the present embodiment, the air damper 5 is used.

The biasing means 25 is not particularly limited as long as it applies a biasing force in the closing direction, but in this embodiment, an elastic member such as a spring is used to contract the air damper 5. Are attached so as to apply a biasing force.
The biasing means 25 made of a spring may be inserted into the piston rod of the air damper 5 and disposed in the cylinder of the air damper 5, but in this embodiment, the first locking member 20 and the air damper 5 are connected. One end is attached to the engaging member 26 to be attached, and the other end is attached to the main body 27.

The structure of the engaging member 26 is not particularly limited as long as it engages the tip of the piston rod of the air damper 5 and the first locking member 20, but in this embodiment, the main body 27 includes a sliding portion 26b having a length substantially the same as the cylinder length of the air damper 5 moving in parallel with the moving direction of the piston of the air damper 5, and a first locking member 20 formed at one end of the sliding portion 26b. The pivot 26a is pivotally attached, and the mounting portion 26c is attached to the piston rod tip of the air damper 5 and one end of the urging means 25 formed at the other end of the sliding portion 26b. The first locking member 20 is attached to the pivot 26a. The end of the piston rod of the air damper 5 and one end of the urging means 25 are fixed to the other end.
In this case, as shown in FIG. 2 (c), a groove portion M is formed over the entire length of the sliding portion 26 b, fitted into the convex portion N of the main body 27, and sandwiched by the main body 27, so that it moves up and down. The first locking member 20 can be moved without shaking.
Further, unlike the conventional buffering / closing mechanism in which the first locking member is swung around the tip of the piston rod of the air damper 5 as the rocking center, the first locking member 20 rocks the pivot 26a of the engaging member 26. Since it oscillates as the center of movement, the piston rod does not bend in the vertical direction when oscillating, unlike the conventional buffering / closing mechanism.

  The main body 27 forms an opening 27C from which the pivot 26a of the engaging member 26 projects, and the position where the pivot 26a projects in the state in which the air damper 5 of the opening 27C contracts is defined as a first position 27A. The position 27B is formed in an arc shape in plan view (see FIG. 1A) so that the third contact piece 24 of the first locking member 20 engages while swinging.

As shown in FIG. 2A, the first locking member 20 has a first abutting piece 22 and a second abutting piece 23 on one side of a substantially triangular main body 21 in plan view. A groove portion 21b provided while the both abutting pieces 22 and 23 face each other is formed.
The second abutment piece 23 is formed with a second guide portion 23a that allows the second locking member 3 to be guided by the groove portion 21b when the drawer 70 is closed. When the member 20 is disposed in the drawer storage portion 75 as a component of the buffer / closure mechanism 2, the second contact piece 23 extends from the side wall side of the drawer storage portion 75 toward the inside of the drawer storage portion 75. The shape is as follows.
The main body 21 has a first locking when the pivot 26 a disposed on the engaging member 26 opens the hole 21 a to be fitted and the buffering / closing mechanism 2 is disposed on the drawer housing 75. The member 20 can swing in a horizontal plane.

Further, the first abutting piece 22 has a closing operation of the drawer 70 when the first locking member 20 is moved alone to the first position 27A of the main body 27 of the buffering / closing mechanism 2 by malfunction. Sometimes, the second locking member 3 gets over the first contact piece 22 and is guided by the groove portion 21b provided while the first contact piece 22 and the second contact piece 23 face each other. The first guide portion 22a to be formed is formed.
The first guide portion 22a is formed on the side surface of the first contact piece 22 on the drawer 70 side when the first locking member 20 is positioned at the first position 27A of the main body 27. As shown in FIG. 1 (a), the second locking member 3 gets over the first abutting piece 22 when it is closed, as shown in FIG. An inclined surface that gradually tilts toward the back side of the drawer storage portion 75 is formed inside the portion 75.
Thereby, even when the first locking member 20 is moved to the first position 27A of the main body 27 of the buffering / closing mechanism 2 alone by malfunction, the first locking member 20 is manually moved to the second position. It is possible to return to the normal use state by simply moving the drawer 70 to the closed position without moving to 27B, so that even a general user can easily recover from a malfunction without requiring any trouble. can do.

Further, as shown in FIG. 2A, the first locking member 20 is formed symmetrically in the vertical direction, and is detachably disposed on the engaging member 26, so that the first locking member 20 is attached. By reversing and attaching, the protruding directions of the first contact piece 22 and the second contact piece 23 of the first locking member 20 with respect to the main body 27 of the buffering / closing mechanism 2 can be changed.
Thus, even in the buffering / closing mechanism 2 configured to swing the first locking member 20 in a horizontal plane, the buffering / closing device 1 for drawer common to both the left and right of the drawer 70 and the drawer storage portion 75 is used. Can be applied.

The second locking member 3 is provided while the first contact piece 22 and the second contact piece 23 of the first locking member 20 face each other when the drawer 70 is in the closed position. It consists of an engagement bar 3A located in the groove 21b and a flange 3B to which the engagement bar 3A is attached.
Then, the second locking member 3 is attached to the outer side of the back plate 73 on the back side of the drawer 70 by contacting the flange 3B at a position corresponding to the buffering / closing mechanism 2 by a fixing means such as a screw. ing.

  As shown in FIG. 3, the air damper 5 used for the buffering / closing mechanism 2 has a cylinder 15 with one end closed and the other end opened, and a seal member 10 slidably in contact with the inner peripheral surface 16a of the cylinder 15. The cylinder 18 includes a piston 18 and a piston rod 19 extending from the piston 18, and the seal member 10 is arranged so that a gap is formed between the piston rod 19 side and the inner peripheral surface 16 a of the cylinder 15. A cylindrical portion 11 having a smaller diameter than the inner diameter, a diameter-expanding portion 12 formed so as to be gradually enlarged in diameter and connected to the inner peripheral surface 16a of the cylinder 15, and an inner peripheral side of the cylindrical portion 11 It is made up of a cylindrical member having flexibility, which is formed by the annular protrusion 13 that is loosely fitted to the small-diameter step portion 30 formed on the piston 18.

The cylinder 15 is not particularly limited as long as it has a cylindrical shape with one end closed and the other end opened. In the present embodiment, the cylindrical member 16 with both ends opened, The lid member 17 is configured to close one end of the cylindrical member 16.
Further, if the open end side is also configured to have a space through which the piston rod 19 passes and air flows, the lid member can be fitted.

The piston 18 moves in the cylinder 15 as the piston rod 19 moves in the axial direction of the cylinder 15, and has a smaller diameter than the inner diameter of the cylinder 15.
And the piston 18 forms the small diameter step part 30 for attaching the seal member 10 which slidably contacts the inner peripheral surface 16a of the cylinder 15 on the peripheral surface.

In addition, the piston 18 has a small stepped portion 30 sandwiched between a closed side (left side in the figure) of the cylinder 15 as a front step portion 31 and an open side of the cylinder 15 (the piston rod 19 side on the right side in the drawing example) as a rear step portion 32. .
The front step portion 31, the small-diameter step portion 30, and the rear step portion 32 can be integrated, but in this embodiment, the seal member 10 can be easily attached as shown in FIG. 4B. The front step portion 31 and the small diameter step portion 30 are formed separately from the rear step portion 32 side so that the attachment hole 33 is opened on the end surface on the small diameter step portion 30 side, and the attachment hole 33 is formed on the end surface of the rear step portion 32. The projecting pins 34 are formed so as to be integrated with each other.
The tolerance between the inner diameter of the mounting hole 33 and the outer diameter of the projecting pin 34 is in the range of an intermediate fit or an interference fit so that the piston rod 19 does not easily come off due to the axial movement of the cylinder 15. Yes.
Further, a male screw can be formed on the protruding pin 34, a female screw can be formed on the mounting hole 33, and the protruding pin 34 can be screwed into the mounting hole 33.
Accordingly, the integrally formed front step portion 31 and small diameter step portion 30 are inserted into the space 10A on the inner peripheral side of the seal member 10, and the mounting hole 33 is positioned on the end surface of the seal member 10 on the annular protrusion 13 side. The sealing member 10 can be attached to the piston 18 by a simple procedure of fitting the protruding pin 34 of the rear stage portion 32 into the attachment hole 33.

The piston rod 19 provided so as to extend from the rear stage portion 32 of the piston 18 can be attached to the rear stage portion 32 by fixing means such as screwing or adhesion, but in this embodiment, it has an integral structure.
Further, the piston rod 19 has a length in which one end protrudes from the open end of the cylinder 15 to the outside even when the piston 18 is located at the innermost side of the cylinder 15 on the cylinder closing side. The connecting portion 19b connected to the attachment portion 26c of the engaging member 26 is formed.
The shape of the piston rod 19 can be a cylindrical shape slightly smaller than the inner diameter of the cylinder 15 or a prismatic shape so that the piston rod 19 can be inserted into the cylinder 15, but in this embodiment, as shown in FIG. As shown, a plurality of ribs 19 a extending in the axial direction in sliding contact with the inner peripheral surface 16 a of the cylinder 15 are formed on the outer peripheral surface of the piston rod 19.
As a result, the linear motion of the piston 18 is improved, the sliding contact state of the seal member 10 with the inner peripheral surface 16a of the cylinder 15 can be made uniform, and the operation of the seal member 10 described later can be stabilized. ing.

  As shown in FIG. 5, the seal member 10 is configured by a rubber-made cylindrical member made up of a cylindrical portion 11, an enlarged diameter portion 12, and an annular protrusion 13.

On the outer peripheral surface of the cylindrical portion 11 of the seal member 10, as shown in FIG. 5C, a plurality of axially extending grooves, in the present embodiment, four grooves 11a are formed at equal intervals. Yes.
Thereby, when the deformation performance of the cylindrical part 11 is improved and the air damper 5 is contracted, the inner peripheral surface 11 b is pressed by the pressure of the air in the inner peripheral side space 10 </ b> A of the seal member 10, and the outer periphery of the cylindrical part 11. The surface expands toward the inner peripheral surface 16a, and the outer peripheral surface of the cylindrical portion 11 is in sliding contact with the inner peripheral surface 16a of the cylinder 15, so that a greater resistance force can be given to the movement of the piston 18. In addition, when the load in the direction of contracting the air damper 5 is released, the piston 18 is prevented from being pushed back in the reverse direction by the air pressure in the space 10A on the inner peripheral side of the seal member 10. ing.

The enlarged diameter portion 12 forms a slidable contact portion 12a at the tip, and the slidable contact portion 12a is formed so as to have substantially the same diameter as the inner diameter of the cylinder 15, and as the piston 18 moves, the cylinder 15 It moves so as to be in sliding contact with the inner peripheral surface 16a and restricts the flow of air in the cylinder 15.
Further, when the air damper 5 is contracted, the enlarged diameter portion 12 is configured to press the sliding contact portion 12 a against the inner peripheral surface 16 a of the cylinder 15 by the air pressure in the space 10 A on the inner peripheral side of the seal member 10. When the peripheral surface 12b and the air damper 5 are extended, the space 10A on the inner peripheral side of the seal member 10 becomes negative pressure, so that the enlarged diameter portion 12 is bent and the air on the open end side of the cylinder 15 is sealed. 10 is provided with an outer peripheral surface 12c that smoothly circulates on the outer peripheral side.

The annular protrusion 13 loosely fitted to the small diameter step 30 formed on the piston 18 formed on the inner peripheral side of the cylindrical portion 11 has an inner diameter D1 of the annular protrusion 13 as an outer peripheral surface 30a of the small diameter step 30 of the piston 18. Is formed to have a smaller diameter than the outer diameter D2 of the small-diameter step portion 30 of the piston 18, and the axial length L1 of the annular protrusion 13 is set to the axial direction of the small-diameter step portion 30. The length L2 of the piston 18 is shorter than the outer circumferential surface 30a of the small-diameter step portion 30 of the piston 18 and the inner peripheral surface 13c of the annular protrusion 13, and the small-diameter step portion 30 side of the front step portion 31 of the piston 18 Between the standing surface 31a and the inner standing surface 13b of the annular protrusion 13 and between the standing surface 32a on the small diameter step portion 30 side of the rear step portion 32 of the piston 18 and the outer standing surface 13a of the annular protrusion 13. Small gaps S1, S2 and S3 are formed between them. It is.
Among these gaps, the gap S2 and the gap S3 are in a state where the standing surfaces of the annular protrusion 13 of the piston 18 and the seal member 10 are in contact with each other when the piston 18 moves in the cylinder 15. It is not completely sealed, and air flow from the high pressure side to the low pressure side is allowed.
In the present embodiment, the outer diameter D4 of the portion of the outer standing surface 13a of the annular protrusion 13 is formed to be smaller than the outer diameter D3 of the cylindrical portion 11, so that the air from the high pressure side to the low pressure side is formed. The amount of circulation is adjusted (increased), and thereby the magnitude of the buffering force is adjusted.
In addition, by forming a groove (not shown) through which air flows in either one or both of the standing surfaces of the piston 18 and the annular protrusion 13 of the seal member 10, the amount of air flowing from the high pressure side to the low pressure side can be reduced. It can be adjusted (increased), whereby the magnitude of the buffering force when closing the drawer 70 can be adjusted.

As shown in FIG. 8, the drawer buffering / closing device 1 is arranged on one side plate 72 side of the drawer 70 and on the side wall of the drawer storage portion 75 corresponding to the side plate 72 side.
As described above, the first locking member 20 is formed symmetrically in the vertical direction, so that the same member can be used to cushion and close the drawer for both the left and right sides of the drawer 70 and the drawer storage portion 75. The device 1 can be applied.
The buffering / closing mechanism 2 is disposed below the fixed rail 77 of the drawer housing portion 75. When the drawer 70 is opened, the first locking member 20 is positioned at the second position 27B of the main body 27. And only the second abutting piece protrudes and waits in a state where it can engage with the engaging bar 3A of the second locking member 3.
Here, as shown in FIG. 8B, at least the fixed rail 77 on the side where the buffering / closing mechanism 2 is disposed forms a restricting portion 77a in which the upper end portion having a U-shaped cross section is folded downward. By restricting the deviation in the width direction of the guide roller R disposed in the drawer 70, the engagement between the first locking member 20 and the second locking member 3 is made more reliable. Yes.

  Next, the operation of the buffer / closing device 1 for drawer will be described with reference to FIG.

In the state in which the drawer 70 is closed, as shown in FIG. 9A, the engagement bar 3 </ b> A of the second locking member 3 is connected to the first contact piece 22 of the first locking member 20. And the second abutting piece 23 are positioned in the groove 21b provided between them.
Then, with the opening operation of the drawer 70, the engagement bar 3A comes into contact with the first contact piece 22, and the second locking member 3 and the first locking member 20 are engaged. Then, as shown in FIG. 9B, it moves to the left side of the figure.

  At this time, the air damper 5 is extended, and as shown in FIG. 7A, the piston 18 moves to the open end side (right side in the figure) of the cylinder 15 and is connected to the space 15A on the closed end side of the cylinder 15 and this. When the space 10A on the inner peripheral side of the seal member 10 becomes negative pressure, the enlarged diameter portion 12 is bent, and the air in the space 15B on the open end side of the cylinder 15 passes through the outer peripheral side of the seal member 10 (one The air in the portion serves as an air circulation path on the inner peripheral side of the seal member 10. Specifically, the minute gaps S 1, S 2 and S 3 (where the gap S 2 is an annular shape of the piston 18 and the seal member 10. The standing surfaces 31a and 13b of the protrusion 13 are in contact with each other but are not completely sealed, and air flow from the high pressure side to the low pressure side is permitted. The space 15 on the closed end side of the cylinder 15 on the low pressure side Smoothly distributed in, can be moved easily piston 18 with a small resistance force, in the opening operation of the drawer 70, it is possible to open the drawer 70 without feeling resistance.

When the opening operation of the drawer 70 is further continued, as shown in FIG. 9C, the first locking member 20 reaches the second position 27B of the main body 27 and the first bar of the engagement bar 3A is reached. The pressing force of the contact piece 22 causes the pivot 26a to swing counterclockwise with the pivot 26a as the center of swing, and the third contact piece 24 engages with the second position 27B of the arcuate body 27. To do.
In this state, the urging force of the urging means 25 is applied to the first locking member 20 via the engaging member 26 on the right side of the figure, but the first locking member 20 It will be in the state stopped at the 2nd position 27B.
Then, the drawer 70 from which the engagement between the first locking member 20 and the second locking member 3 is released moves to the fully opened position without receiving any resistance of the buffering / closing mechanism 2.

  Next, in the closing operation of the drawer 70, the engagement bar 3A comes into contact with the second contact piece 23 of the first locking member 20 in the state stopped at the second position 27B of the main body 27, and further to the back side. By moving to the (right side in the figure), the first locking member 20 swings clockwise in the figure, and the locked state at the second position 27B of the third contact piece 24 is released. Is done.

When the drawer closing operation is further continued, the air damper 5 is contracted, and the piston 18 moves to the closed end side (left side in the figure) of the cylinder 15 as shown in FIG. The inner circumferential surface 12b of the enlarged diameter portion 12 is pressed by the air in the space 15A on the side, and the sliding contact portion 12a of the enlarged diameter portion 12 is further strongly pressed against the inner circumferential surface 20a of the cylinder 15, so that the cylinder of the piston 18 This gives resistance to the movement of the drawer 15 toward the closed end. As a result, the closing operation of the drawer 70 is buffered even if it tries to close the drawer 70 vigorously, and a loud sound is generated by striking the back side of the drawer housing 75. Or pinching fingers.
Further, the inner peripheral surface 11 b is pressed by the pressure of the air in the space 10 A on the inner peripheral side of the seal member 10, the outer peripheral surface of the cylindrical portion 11 expands toward the inner peripheral surface 20 a side, and the inner peripheral surface of the cylinder 15. When the outer peripheral surface of the cylindrical portion 11 is in sliding contact with 20a, a greater resistance force is given to the movement of the piston 18, and when the load in the direction of contracting the air damper 5 is released, the seal member 10 Since the piston 18 is prevented from being pushed back in the reverse direction by the pressure of the air in the inner circumferential space 10A, the drawer 70 will not open even if the closing operation of the drawer 70 is stopped.
And even if the closing operation of the drawer 70 is stopped halfway due to the urging force of the urging means 25, the drawer 70 slowly moves to the closed position (position shown in FIG. 9A).

  At this time, the air in the space 15 </ b> A on the closed end side of the cylinder 15 on the high pressure side becomes an air flow path on the inner peripheral side of the seal member 10, specifically, the outer peripheral surface 30 a of the small diameter step portion 30 of the piston 18. And the inner peripheral surface 13 c of the annular projection 13, between the standing surface 31 a on the small diameter step portion 30 side of the front step portion 31 of the piston 18 and the inner standing surface 13 b of the annular projection 13, and the rear stage of the piston 18. Minute gaps S1, S2 and S3 formed between the standing surface 32a on the small diameter step portion 30 side of the portion 32 and the outer standing surface 13a of the annular protrusion 13 (here, the gap S3 is defined by the piston 18 and The standing surfaces 32a and 13a of the annular protrusion 13 of the seal member 10 are in a contact state S3 ′, but are not completely sealed, and air flow from the high pressure side to the low pressure side is allowed. Through the open end side space 15 of the low pressure side cylinder 15. Gradually distributed in the, at this time, can give a sufficient resistance to the piston 18, it is possible to obtain a damping force at the closing of the drawer 70.

  As described above, the buffer / closure device for drawer according to the present invention has been described based on the embodiments thereof, but the present invention is not limited to the configurations described in the above embodiments, and may appropriately be included within the scope of the invention. The configuration can be changed.

  The drawer cushioning / closing device of the present invention securely engages the locking members even if the drawer is displaced in the width direction during the closing operation of the drawer, so that the impact at the time of closing is buffered and the drawer is It can be moved to the fully closed position, and even if the locking member arranged in the drawer storage part moves to the back side of the drawer storage part due to malfunction, it is normal without removing the drawer from the drawer storage part. Therefore, it can be suitably used as a buffer device for drawing out.

DESCRIPTION OF SYMBOLS 1 Buffering / closing device for drawer | drawing-out 2 Buffering / closing mechanism 20 1st latching member 22 Contact piece 22a Guide part 23 Contact piece 23a Guide part 24 Contact piece 25 Energizing means 26 Engaging member 3 2nd engagement Stop member 4 Damper member 5 Air damper 70 Drawer 75 Drawer storage

Claims (4)

A first locking member disposed on a side wall of the drawer storage portion , and a damper member for applying a buffering force to the drawer during the closing operation of the drawer locked to the first locking member via the locking member and the closing A buffering / closing mechanism having a biasing means for applying a biasing force in a direction, and a second locking member disposed on the drawer side and engaged with the first locking member of the buffering / closing mechanism. When the drawer is opened, the first locking member is engaged with the first locking member from the first position of the body of the buffering / closing mechanism with the first locking member and the second locking member engaged. The position is moved to position 2 so that the engagement is released, and the first locking member stops at the position, and stops at the second position of the body of the buffering / closing mechanism when the drawer is closed. The second locking member is engaged with the first locking member, and the second locking member is the main body of the buffering / closing mechanism. In drawer buffer-closing device which is adapted to move from the second position to the first position, the second locking member is attached to the outer surface of the back side of the back plate of the drawer, the first A locking member is positioned on the back side of the drawer during the opening operation of the drawer , and the second locking member engages with the main body portion that is swingably disposed on the engaging member in a horizontal plane. 1 abutting piece, a second abutting piece that is located on the back side of the drawer when the drawer is closed, and the second locking member engages, and buffers and closes the first locking member And a third abutting piece that oscillates at a position moved to the second position of the main body of the mechanism and abuts on the main body of the buffer / closing mechanism to stop. apparatus.   When the first abutting piece of the first locking member is moved to the first position of the main body of the buffering / closing mechanism by a malfunction alone, the drawer is closed. The first locking member moves over the first contact piece and is guided to a groove provided while the first contact piece and the second contact piece face each other. The drawer buffer / closure device according to claim 1, wherein the guide portion is formed.   The second abutting piece is provided on the second abutting piece of the first abutting member while the first abutting piece and the second abutting piece face each other when the drawer is closed. 3. The drawer buffer / closure device according to claim 1, wherein a second guide portion is formed so as to be guided in the groove portion.   The first locking member is formed symmetrically in the vertical direction, and is detachably disposed on the engaging member, and the first locking member is reversed and attached to the main body of the buffering / closing mechanism. 4. A drawer buffering / closing device according to claim 1, wherein the protruding direction of the first contact piece and the second contact piece of the first locking member can be changed. .

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