JP2012231885A - Opening/closing body cushioning apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening/closing body cushioning apparatus which can be easily assembled and adjusted, has a high reliability, exhibits a stable impact absorbing force, and can be fitted afterward by a single body.SOLUTION: The opening/closing body cushioning apparatus includes: a body part 20; an arm part 40 having a contact part 42 fitted to the body part 20 through a rotating shaft 23 and pressed by bringing it into contact with a housing body 2 or an opening/closing body 3 and rotating by this pressing force using the rotating shaft 23 as a center; and a damper 30 equipped with a shaft 32 fitted to either one of the body part 20 or the arm part 40 and straightly moving by a predetermined stroke L1. In the arm part 40, the impact of the rotation is cushioned by an energizing force of the damper 30, and a length L3 from the rotating shaft 23 of the arm part 40 to a contact part 42 is made longer than the predetermined stroke L1 of the shaft 32 of the damper 30 so that a cushioning stroke L2 in the drawing out direction when the arm part 40 is rotated and moved is made longer than the predetermined stroke L1 of the shaft of the damper 30.

Description

  The present invention relates to an opening / closing body shock absorber for absorbing an impact when closing the opening / closing body such as a drawer.

  2. Description of the Related Art Conventionally, an opening / closing body shock absorber for buffering / absorbing an impact at the time of closing such as a drawer is known. For example, when opening and closing body shock absorbers store broken objects such as teacups and dishes in drawers such as kitchens, there is less risk of damage to these stored items due to impacts at closing (especially when closing). It is used to

  Most of the opening / closing body shock absorbers are used as a part of the opening / closing body closing device. Specifically, the opening / closing body closing device includes a drawing / drawing device for forcibly drawing the drawer in the closing direction, and an opening / closing body shock absorber which is a subject of the present application.

  As the above-described withdrawal / drawing device, the member to be captured provided on the drawer side is captured by the capturing mechanism provided on the housing side, and the drawer is forcibly pulled in the closing direction via the member to be captured. . Further, as the opening / closing body shock absorber, a rotary damper is provided on the drawer side, and a pinion attached to the rotary shaft of the rotary damper engages with a rack attached to the housing side to buffer an impact at the time of closing. There are some (see, for example, Patent Document 1).

  Further, as an opening / closing body closing device using other opening / closing body shock absorbers, there is one in which a drawer / drawing device and an opening / closing body closing device are integrally configured. For example, a drawer / drawing device is provided with a member to be captured on the drawer side, and with a drawer rail for guiding the member to be captured on the housing side. On the drawer rail, the member to be captured is captured and the drawer is biased in the closing direction. A capture pull-in mechanism is provided. The opening / closing body shock absorber includes a linear motion damper that is integrally formed with the catching / retracting mechanism on the pull-out rail, and is arranged so that the longitudinal direction is oriented in the pull-out direction of the pull-out rail. The impact when the drawer is closed is absorbed through the member to be captured (see, for example, Patent Documents 2 and 3).

JP 2002-291553 A JP 2010-269176 A JP 2010-273780 A

However, in the opening / closing body shock absorber using the rotary damper described above, when used together with the pull-in / drawing device, it is necessary to adjust the timing at the time of capture and the timing at the time of engagement of the rack and pinion, and the assembly adjustment is difficult. .
Further, in the opening / closing body shock absorber using the above-mentioned linear motion damper, when a large shock-absorbing stroke (movement distance in the pull-out direction of the drawer) is to be secured, a damper with a large stroke of the shaft of the damper must be used. However, when the stroke of the shaft of the damper is increased, there is a risk that the linear motion cannot be performed smoothly due to the shaft distortion of the damper, and the reliability when operated several times becomes a problem. In addition, a difference occurs in the urging force of the spring inside the damper for returning the damper at both ends of the stroke start point and end point of the damper shaft, and it is difficult to exert a stable shock absorbing force. Furthermore, when the stroke of the damper is large, it is necessary to increase the urging force of the return spring inside the damper. However, if this urging force is increased, the pull-in force of the pull-in / pull-out mechanism is hindered, which is not preferable as an overall configuration.

  Furthermore, since the opening / closing body shock absorbers described in Patent Documents 2 and 3 described above are integrally configured as an opening / closing body closing device, for example, the opening / closing body is attached to a drawer in which only a drawer / drawing device is attached in advance. The shock absorber cannot be installed later. Moreover, since it is necessary to remove the present drawer drawing-in apparatus and to replace the whole in order to attach darely, it is unpreferable.

  The present invention has been made in view of the above-described circumstances, and provides an opening / closing body shock absorber that is easy to assemble and adjust, exhibits a highly reliable and stable shock absorption capability, and can be retrofitted as a single unit. Is for.

  In order to solve the above-described problems, the present invention provides an opening / closing body shock absorber for absorbing an impact at the time of closing of an opening / closing body that is pulled out from a housing and used, and includes a main body portion and a rotation shaft on the main body portion. And an arm portion that rotates around the rotation shaft by this pressing force. The arm portion has a contact portion that is attached to and pressed against the housing or the opening / closing body when the opening / closing body is closed. And a damper provided with a shaft that is attached to either the main body part or the arm part and moves linearly with a predetermined stroke, and the arm part is subjected to a rotational impact by the biasing force of the damper. It is designed to be buffered, so that the buffer stroke in the pull-out direction when the arm portion rotates and moves is longer than the stroke of the shaft of the damper from the rotating shaft of the arm portion. Previous Up to a length of abutment, characterized by being longer than the stroke of the shaft of the damper.

  Further, the arm part or the main body part includes a cam surface that urges the damper in a stroke direction by a rotation operation of the arm part, and the damper includes a cylindrical cylinder part having a diameter larger than that of the shaft. And the cam surface may be brought into contact with the cylindrical bottom surface of the cylinder portion.

  Furthermore, the damper may be housed in the main body so that the pull-out direction of the opening / closing body and the longitudinal direction of the damper are substantially perpendicular to each other.

  In addition, the damper may be disposed on one side of the main body portion and the rotation shaft may be disposed on the other side of the main body portion when viewed from the axial direction of the rotation shaft.

  Furthermore, the arm portion can be configured to be positioned below the damper of the main body portion.

  According to the opening / closing body shock absorber according to the present invention, the main body part is attached to the main body part via the rotation shaft, and is pressed against the housing or the opening / closing body when the opening / closing body is closed. An arm portion that rotates around the rotation axis by this pressing force, and a shaft that is attached to either the main body portion or the arm portion and moves linearly with a predetermined stroke. The arm portion is configured so that the impact of rotation is buffered by the biasing force of the damper, and the buffer stroke in the pull-out direction when the arm portion rotates and moves Is longer than the stroke of the shaft of the damper, so that the length from the pivot shaft of the arm portion to the contact portion is longer than the stroke of the shaft of the damper. Can stroke over the shaft to use a shorter. Thereby, even if the linear motion of the damper shaft is performed a plurality of times, a more stable linear motion can be obtained. Therefore, the reliability of the operation of the opening / closing body shock absorber can be improved. Further, by shortening the stroke of the shaft, the urging force of the spring for returning the damper is made uniform at both ends of the stroke starting point and end point, and a more stable shock absorbing force can be exhibited.

It is an external appearance perspective view which shows the drawer | drawing-out part which attached the opening-and-closing body buffer device based on this invention. It is a figure which shows attachment of an opening-and-closing body shock absorbing device, Comprising: It is the schematic diagram which showed the state which drawer | drawer opened. It is the schematic which showed the state which pulled out from the state of FIG. It is a front view which shows the opening-and-closing body shock absorber before operation | movement (state of FIG. 2) alone. It is a front view which shows the opening-and-closing body shock absorber after operating from the state of FIG. 4 (state of FIG. 3) alone. FIG. 6 is a left side view of FIG. 5. It is a disassembled perspective view of an opening-closing body buffer. It is the schematic which showed the buffer stroke of the opening-and-closing body buffer device, and the stroke of the shaft of a damper. FIG. 10 is a perspective view showing an external appearance of a modified example in which the arm portion of the opening / closing body shock absorber is mounted on the upper side. It is a modification and is an external appearance perspective view which shows the state which attached the opening-and-closing body shock absorber to the bottom part. It is a modification and is an external appearance perspective view which shows the state which attached the opening-and-closing body shock absorber to the back side surface. It is a modification and is an external appearance perspective view which shows the state which attached the opening-and-closing body shock absorber to the back surface of drawer | drawing-out. FIG. 10 is a schematic diagram showing a modified example of the present embodiment and showing a structure in which a damper is disposed on an arm portion before operation. FIG. 14 is a schematic diagram after the operation of FIG. 13.

  Hereinafter, an opening / closing body shock absorber 10 according to an embodiment of the present invention will be described in detail with reference to the drawings. In addition, the case where the opening / closing body shock absorber 10 in this Embodiment is applied to the drawer | drawer used pulling out horizontally is demonstrated.

  FIG. 1 is an external perspective view showing a drawer portion to which the opening / closing body shock absorber 10 is attached. FIG. 2 is a schematic diagram showing attachment of the opening / closing body shock absorber 10, and is a schematic diagram showing a state in which the drawer is opened. FIG. 3 is a schematic diagram showing a state in which the drawer is closed from the state of FIG. is there.

  As shown in FIGS. 1 to 3, the drawer 3 used in a kitchen or the like is housed in a housing 2 that can draw out the drawer 3 in the horizontal direction. More specifically, a drawer rail 4 extending in the horizontal direction (drawing direction) is attached to the side portion of the housing 2, and opens and closes by moving the drawer 3 along the drawer rail 4. It has become.

  The casing 2 is provided with a drawer / drawing device (not shown) that forcibly biases the drawer 3 in the closing direction when the drawer 3 is closed. In addition, as shown in FIGS. 1 to 3, an opening / closing body cushioning device 10 for absorbing an impact when the drawer 3 is closed is provided separately (separately) from the drawer / drawing apparatus. It has been.

As shown in FIGS. 1 to 3, the opening / closing body shock absorber 10 is disposed in a space S between the back surface 3 a of the drawer 3 and the rear surface portion 2 b of the housing 2. More specifically, the opening / closing body shock absorber 10 is in a position where the main body portion 20 (see FIGS. 4 to 7) of the opening / closing body shock absorber 10 and the back surface 3a of the drawer 3 do not interfere with each other when the drawer 3 is closed. And it is attached to both of the inner part 2a of the housing | casing 2, respectively. As shown in FIGS. 2 and 3, the opening / closing body shock absorber 10 is attached to a mounting hole 25 (see FIGS. 4 to 7) provided in a main body 20 (details will be described later) of the opening / closing body shock absorber 10. The mounting screw 5 is inserted into the inner portion 2a and screwed to the inner portion 2a. In this way, by attaching the opening / closing body shock absorbers 10 to the left and right sides of the inner portion 2a, the impact in the pull-out direction received by the pull-out 3 can be received evenly on the left and right.
In addition, when it is not necessary to receive evenly on the left and right, the opening / closing body shock absorber 10 may be provided only on one side of the inner side surface 2a.

  4 is a front view showing the opening / closing body shock absorber 10 before operation (state of FIG. 2) as a single unit, and FIG. 5 shows the opening / closing body shock absorber 10 after operation from the state of FIG. 4 (state of FIG. 3). FIG. 6 is a left side view of FIG. 5. FIG. 7 is an exploded perspective view of the opening / closing body shock absorber 10 as viewed from the upper right side.

  As shown in FIGS. 4 to 6, the opening / closing body shock absorber 10 includes a main body portion 20, a damper 30 accommodated in the main body portion 20, and an arm portion rotatably attached to the main body portion 20. 40.

  The main body 20 is molded from a resin material, and is formed in a substantially rectangular parallelepiped shape as shown in FIGS. A damper accommodating portion 21 is provided on the left side (one side) of the main body portion 20 in FIG. The damper accommodating portion 21 has an opening 21a on the lower surface of the main body portion 20, and is formed as a columnar vertical hole 21b so as to extend upward from the opening 21a. The upper part of the vertical hole 21b does not penetrate to the upper side of the main body part 20, and is closed by the ceiling part 21c. As shown in FIGS. 4 to 6, a damper 30, which will be described in detail later, is inserted and accommodated in the damper accommodating portion 21 from the lower opening 21 a.

  The diameter of the vertical hole 21b is slightly larger than the diameter of a cylinder part 31 of the damper 30 described later, and the outer peripheral surface of the cylinder part 31 and the inner peripheral surface of the vertical hole 21b are not fixed by friction. . More specifically, the inner peripheral surface of the vertical hole 21b serves as a guide surface for moving the cylinder portion 31 along the vertical hole 21b. With the damper 30 inserted and accommodated in the vertical hole 21b, the damper 30 It can move freely under its own weight. When the cam surface 43 of the arm part 40 described later receives the dead weight of the damper 30, the return operation of the arm part 40 (operation to return to the state of FIG. 4) is assisted.

  On the other hand, a shaft hole 22 penetrating from the front surface side to the back surface side in FIG. 4 is provided on the lower right side (the other side) of the main body portion 20. As shown in FIG. 7, a rotation shaft 23 is attached to the shaft hole 22.

  Further, as shown in FIGS. 4 and 5, a counterbore portion 24 formed inside the main body portion 20 as a rectangular space is provided at a portion where the shaft hole 22 is formed. This counterbore part 24 is formed in such a manner that it communicates with the vertical hole 21b described above in the left-right direction of FIG. Further, the lower opening 21 a of the vertical hole 21 b described above extends to the lower side of the counterbore portion 24. As shown in FIGS. 4 and 5, the upper portion of the arm portion 40 is inserted into the counterbore portion 24 through the opening 21 a, and the arm portion 40 and the main body portion 20 are pivotally supported by the rotation shaft 23. Is done.

  As shown in FIG. 7, the rotating shaft 23 is a pin having one end formed in a flange shape, and the flange portion 23 a is locked to the edge portion of the shaft hole 22. Further, the other end side of the rotating shaft 23 is fixed by caulking the end portion after being inserted into the shaft hole 22 so that the rotating shaft 23 is not detached.

  Further, the main body 20 is provided with two mounting holes 25 for mounting the main body 20. The mounting hole 25 is provided so as to penetrate from the front surface side to the back surface side in FIG. A fastening member such as a mounting screw 5 (see FIGS. 2 and 3) is inserted into the mounting hole 25, and the main body 20 is fixed to the inner portion 2 a of the housing 2 by fastening the mounting screw 5. (See FIGS. 1 to 3).

  In addition, in order to reduce the weight of the opening / closing body shock absorber 10, the main body 20 is provided with an appropriate meat steal 26 and a reinforcing rib 27.

  As shown in FIGS. 4 to 7, the damper 30 includes a cylindrical cylinder portion 31 and a shaft 32 protruding or retracting from the cylinder portion 31. The cylinder portion 31 is filled with hydraulic oil and a return spring, and the shaft 32 protrudes or retreats by the urging force of the spring, and the operation of the shaft 32 is buffered by the pressure of the hydraulic oil. . As shown in FIG. 4, the cylinder portion 31 is thicker than the diameter of the shaft 32, and the area of the bottom surface 31 a of the cylinder portion 31 is wider than the cross-sectional area of the shaft 32.

  As shown in FIGS. 4 to 7, the damper 30 is assembled in such a manner that it is inserted from the lower opening 21 a of the main body 20 with the tip 32 a of the shaft 32 facing upward. That is, the tip 32a of the shaft 32 is attached so as to contact the ceiling 21c. Further, the bottom surface 31 a of the cylinder portion 31 comes into contact with the cam surface 43 of the arm portion 40 in a state where an arm portion 40 described later is assembled to the main body portion 20. That is, the cam surface 43 of the arm portion 40 receives the weight of the damper 30.

  The damper 30 is selected so that the shaft 32 protrudes or retracts with a stroke L1 (see FIG. 8) as short as possible. This is to prevent the linear motion of the shaft 32 from becoming difficult due to repeated linear motion of the shaft 32 by shortening the stroke L1 of the shaft 32.

  In addition, the damper 30 has a longitudinal direction of the damper 30 (vertical direction in the present embodiment) and a drawing direction of the drawer 3 (horizontal direction in the present embodiment) in a state where the damper 30 is assembled to the main body portion 20. It is assembled so as to be substantially orthogonal. Thereby, even if the length in the drawer direction of the space S between the back surface 3a of the drawer 3 and the rear surface portion 2b of the housing 2 is short, the opening / closing body shock absorber 10 is stored in the space S alone. Will be able to.

  The arm part 40 is integrally molded with a resin material. As shown in FIGS. 4 to 7, the arm portion 40 includes an arm 41 that extends in the vertical direction, a contact portion 42 that protrudes from the lower front end portion of the arm 41 toward the right side of FIG. 4, and an arm The cam surface 43 protrudes upward from the upper end portion of 41 and a positioning portion 44 that protrudes rightward from the upper end portion of the arm 41.

  As shown in FIGS. 4 to 7, the arm 41 extends up and down, and a rotation hole 41 a is formed in the upper portion thereof. This rotation hole 41a is assembled | attached corresponding to the shaft hole 22 of the main-body part 20 mentioned above. The arm portion 40 rotates about the rotation shaft 23 with respect to the main body portion 20 by inserting the rotation shaft 23 into the shaft hole 22 and the rotation hole 41a.

  As shown in FIG. 4, the abutting portion 42 is formed in a half arc shape, and the arc-shaped abutting surface 42 a faces rightward when assembled as the opening / closing body shock absorber 10. ing. When the drawer 3 is closed, the abutting surface 42a of the abutting portion 42 abuts on the back surface 3a of the drawer 3 so that the arm portion 40 rotates while sliding.

The length of the arm 41 described above is formed longer than the stroke of the shaft 32 of the damper 30 described above. More specifically, the length from the rotation shaft 23, which is the rotation center, to the contact portion 42 is longer than the stroke of the shaft 32. Thus, by ensuring the length of the arm 41 to be long, the moving distance (buffer stroke L2) in the horizontal direction of the abutting portion 42 of the arm portion 40 rather than the stroke L1 (see FIG. 8) of the shaft 32 of the damper 30. ) Can be secured for a long time. Thereby, the time which the contact part 42 and the drawer | drawer 3 contact | abut can be lengthened.
Specifically, the buffer stroke L2 is about three times as long as the stroke L1 of the shaft 32, and from the rotation shaft 23 of the arm portion 40 to the contact portion 42 so as to obtain this buffer stroke L2. The length L3 is determined. The buffer stroke L2 can be freely set (for example, 5 times) in accordance with the structure of the drawer 3.

  As shown in FIG. 4, the cam surface 43 is formed in a half arc shape, and the arc-shaped cam surface 43 faces upward. The cam surface 43 acts to push up the cylinder portion bottom surface 31a of the damper 30 when the drawer 3 is closed (when the arm portion 40 rotates to the left in FIG. 4). At this time, the cam surface 43 comes in contact with the bottom surface 31a of the cylinder and pushes the damper 30 upward while sliding.

  As shown in FIG. 4, the positioning portion 44 is formed in a triangular shape, and the apex portion 44a of the triangle is formed to face the right side. The apex 44a of the triangle is chamfered in an R shape. The positioning portion 44 is a vertex portion when the arm portion 40 in FIG. 4 rotates to the left about the rotation shaft 23 and the contact portion 42 moves to the left side of the right side surface 20a of the main body portion 20. 44a is in contact with the inner surface of the counterbore part 24 so that the arm part 40 does not rotate further to the left.

  The arm portion 40 is provided with an appropriate meat steal 45 and a reinforcing rib 46 in order to reduce the weight of the opening / closing body shock absorber 10.

Next, the operation of the opening / closing body shock absorber 10 according to the embodiment of the present invention will be described with reference to FIGS. 2, 3, and 8.
In the state where the drawer 3 is opened (the state shown in FIG. 2), the arm portion 40 of the opening / closing body shock absorber 10 is rotated to the full right side. That is, the arm portion 40 is rotated about the rotation shaft 23 to the right (counterclockwise) by the damper 30 positioned on the left side (one side) of the rotation shaft 23 positioned on the right side (the other side). It is because it is energized to do.
Further, since the weight of the damper 30 is received by the cam surface 43, the weight of the damper 30 also presses the arm portion 40 so as to rotate to the right.

  When the drawer 3 is closed from the state of FIG. 2, the back surface 3 a of the drawer 3 and the contact surface 42 of the arm part 40 come into contact with each other, and the arm part 40 is rotated leftward (clockwise) about the rotation shaft 23. Force acts. At this time, the cam surface 43 of the arm portion 40 pushes the bottom surface 31a of the cylinder portion 31 of the damper 30 upward. Thereby, the rotation of the arm part 40 is buffered by the hydraulic pressure of the damper 30. As a result, the impact in the closing direction of the drawer 3 is buffered by buffering the rotation of the arm portion 40.

FIG. 8 shows the buffer stroke L2 of the opening / closing body shock absorber 10 and the stroke L1 of the shaft of the damper.
As shown in FIG. 8, in the opening / closing body shock absorber 10 in this embodiment, the buffer stroke L <b> 2 in the pull-out direction (horizontal direction) of the drawer 3 is secured longer than the stroke L <b> 1 of the shaft 32. This is realized by increasing the rotation length of the arm portion 40 by increasing the length L3 from the rotation shaft 23 to the contact portion 42. Thus, by ensuring the buffer stroke L2 long, the linear motion operation of the shaft 32 of the damper 30 can be further stabilized.

According to the opening / closing body shock absorber according to the embodiment of the present invention, the main body 20 and the main body 20 are attached to the main body 20 via the rotation shaft 23, and are pressed against the housing 2 when the drawer 3 is closed. A damper having an abutting portion 42, and an arm portion 40 that rotates about the rotation shaft 23 by this pressing force, and a shaft 31 that is attached to the main body portion 20 and linearly moves with a predetermined stroke L1. 30, and the arm portion 40 is configured such that the impact of the rotation is buffered by the biasing force of the damper 30, and the buffer stroke L <b> 2 in the pull-out direction when the arm portion 40 rotates and moves is set. The stroke is longer than the stroke L1 of the shaft 31 of the damper 30. More specifically, since the length from the rotation shaft 23 of the arm portion 40 to the contact portion 42 is longer than the stroke of the shaft 32 of the damper 30, the stroke of the shaft 32 of the damper 30 is small. In addition, it is possible to increase the buffer stroke L2 (distance in the pull-out direction of the arm portion 40) of the contact portion 42 of the arm portion 40. Therefore, even when it is desired to secure a large buffer stroke L2, the damper 30 with a short stroke can be used, and the linear motion of the shaft 32 of the damper 30 can be performed more stably and reliably. As a result, the reliability of the operation of the opening / closing body shock absorber 10 can be improved.
Further, the urging force of the spring for returning the damper 30 is made uniform at both ends of the stroke L1 of the shaft 31 of the damper 30 so that a more stable shock absorbing force can be exhibited.

Further, since the housing 2 or the drawer 3 and the opening / closing body shock absorber 10 are in contact with each other only at the contact portion 42, adjustment work of the operation timing with the drawer / drawing-in apparatus is unnecessary. Therefore, the time for assembly adjustment can be further shortened.
Furthermore, since the opening / closing body shock absorber 10 is configured as a separate body from the pull-in / drawing mechanism, the opening / closing body shock absorber 10 can be attached by a retrofit as a single unit.

  Further, since the damper 30 is disposed so that the drawing direction of the drawer 3 and the longitudinal direction of the damper 30 are substantially perpendicular to each other, the gap between the back surface 3a of the drawer 3 and the rear surface portion 2b of the housing 2 in the closed state. Even when the length of the space S in the depth direction is short, the opening / closing body shock absorber 10 can be installed. Therefore, it becomes easy to install the opening / closing body shock-absorbing device 10 separately from the drawer / draw-in device as a single unit.

  Furthermore, the arm portion 40 includes a cam surface 43 that urges the damper 30 in the stroke L1 direction by the rotation of the arm portion 40. The damper 30 includes a cylindrical cylinder portion 31 having a diameter larger than that of the shaft 32. In addition, since the cam surface 43 is brought into contact with the cylindrical bottom surface 31a of the cylinder portion 31, it is stably in contact with the bottom surface 31a of the cylinder portion 31 having a large area. Therefore, when the arm portion 40 is rotated a plurality of times, the possibility that the sliding operation between the cam surface 43 and the bottom surface 31a cannot be performed smoothly can be reduced. The reliability can be further improved.

  In addition, the damper 20 is disposed on one side of the main body 20 and the rotating shaft 23 is disposed on the other side of the main body 20 when viewed from the axial direction of the rotation shaft 23. A large distance from the center of the shaft 23 to the operating point of the damper 30 can be secured. Therefore, the restoring force (the force for moving from the state of FIG. 3 to the state of FIG. 2) to the initial state (state of FIG. 2) of the arm part 40 can be applied more greatly by the urging force of the damper 30. .

  Furthermore, since the arm portion 40 is configured to be positioned below the damper 30 of the main body portion 20, not only the urging force of the spring inside the damper 30 but also the weight of the damper 30 on the cam surface 43. It can be made to act on the arm part 40 via. As a result, it is possible to assist the return of the arm unit 40 to the initial state (the state shown in FIG. 2).

Although the opening / closing body shock absorber according to the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications and changes can be made based on the technical idea of the present invention. It is.
FIGS. 9-12 shows the variation which attaches the opening-and-closing body buffer device which concerns on embodiment of this invention to a drawer part.
In the present embodiment, the arm portion 40 of the opening / closing body shock absorber 10 is disposed on the lower side of the main body portion 20; however, as shown in FIG. 9, it can be attached so as to face upward. In this case, the urging force to the arm portion 40 is only the urging force of the spring inside the damper 30, and the restoring force due to the weight of the damper 30 does not act.

Moreover, in this Embodiment, although the opening / closing body buffer 10 is attached to the inner side part 2a of the housing | casing 2, it is not limited to this.
For example, as shown in FIG. 10, the opening / closing body cushioning device 10 may be attached to the bottom surface portion 2 c of the housing 2 in a horizontal manner.
Furthermore, as shown in FIG. 11, you may make it attach to the rear surface part 2b of the housing | casing 2. As shown in FIG. In this case, a flange portion 52 for attaching the opening / closing body shock absorber 51 may be provided on the rear surface of the main body portion 50, and the flange portion 52 may be attached via the attachment screw 5.
Furthermore, as shown in FIG. 12, the opening / closing body shock absorber 51 may be attached to the back surface 3 a of the drawer 3.
Even in the case of attachment as shown in FIGS. 9 to 12, the same effect as this embodiment can be obtained.

  On the other hand, in the present embodiment, the damper 30 is accommodated in the main body portion 20, but may be accommodated on the arm portion 40 side. The opening / closing body shock absorber 100 shown in FIG. 13 is a schematic diagram before operation showing a state in which the damper 30 is housed on the arm unit 400 side instead of the main body unit 200 side, and FIG. 14 is an overview after the operation of FIG. FIG. In addition, the same thing as embodiment is shown with the same code | symbol.

  The arm portion 400 is provided with a damper accommodating portion 421 that extends in the longitudinal direction and accommodates the damper 30. As shown in FIG. 13 and FIG. 14, the tip end portion 32 a of the shaft is directed downward (the contact portion 42 side) and the bottom surface 31 a of the cylinder portion 31 is on the upper side (the main body portion 200 side). ). On the other hand, the main body portion 200 is formed with a cam surface 243 for contacting the bottom surface portion 31 a and pressing the damper 30. The other main components such as the positioning unit 44 are the same as those of the present embodiment, and thus detailed description thereof is omitted.

  Also with this structure, the buffer stroke L2 can be secured longer than the stroke L1 of the shaft 31 of the damper 30, and the damper 30 and the cam surface 243 can be brought into contact with each other over a wide area. The same effect can be obtained. Further, since the damper 30 can be disposed along the longitudinal direction of the arm portion 40, the drawer 3 and the damper 30 are not oriented in the same direction as in the conventional configuration, and the drawer 3 Even when the distance between the back surface 3a and the rear surface portion 2b of the housing 2 is short, the opening / closing body shock absorber 100 can be disposed in this space. As a result, it is possible to provide the opening / closing body shock absorber 100 that can be easily assembled and can be retrofitted alone.

  On the other hand, in the present embodiment, the case where the present invention is applied to a drawer that is pulled out horizontally and used is described, but the present invention is not limited to the horizontal direction. That is, it is applicable even if the drawer 3 is pulled out upward. In this case, since the drawer 3 moves in the closing direction by its own weight, it is not necessary to provide a drawer / drawing device.

2 Housing 2a Inner portion 2b Rear surface portion 2c Bottom surface portion 3 Drawer 3a Drawer back surface 4 Drawer rail 5 Mounting screw 10, 100 Opening and closing body shock absorber 20, 200 Main body portion 21, 421 Damper accommodating portion 21a Opening 21b Vertical hole 21c Ceiling portion 22 Shaft hole 23 Rotating shaft 23a Flange part 24 Counterbore part 25 Mounting hole 26 Meat stealing 27 Reinforcing rib 30 Damper 31 Cylinder part 31a Bottom face 32 Shaft 32a Tip part 40, 400 Arm part 41 Arm 41a Rotating hole 42 Abutting part 42a Contact surface 43, 243 Cam surface 44 Positioning portion 44a Apex portion 45 Meat stealing 46 Reinforcement rib 50 Main body portion 51 Opening and closing body shock absorber 52 Flange portion S space L1 Damper shaft stroke L2 Buffer stroke L3 From rotating shaft to contact portion Length of

Claims (5)

An opening / closing body shock absorber for absorbing an impact when closing the opening / closing body to be used by being pulled out from a housing,
The main body,
It has a contact portion attached to the main body portion via a rotation shaft and pressed against the casing or the opening / closing body when the opening / closing body is closed. An arm that pivots about
A damper that is attached to either the main body or the arm and includes a shaft that linearly moves with a predetermined stroke;
With
The arm portion is configured such that the impact of the rotation is buffered by the biasing force of the damper, and the buffer stroke in the pull-out direction when the arm portion rotates and moves is the stroke of the shaft of the damper. The opening / closing body shock absorber is characterized in that the length of the arm part from the pivot shaft to the contact part is longer than the stroke of the shaft of the damper. The arm portion or the main body portion includes a cam surface that urges the damper in a stroke direction by a rotation operation of the arm portion,
The damper includes a cylindrical cylinder portion having a larger diameter than the shaft,
The opening / closing body shock absorber according to claim 1, wherein the cam surface is brought into contact with a cylindrical bottom surface of the cylinder portion.   3. The opening / closing body shock absorber according to claim 1, wherein the damper is housed in the main body so that a drawing direction of the opening / closing body and a longitudinal direction of the damper are substantially perpendicular to each other.   The main body is characterized in that the damper is disposed on one side of the main body and the rotational shaft is disposed on the other side when viewed from the axial direction of the rotation shaft. Item 4. The opening / closing body shock absorber according to item 3.   The opening / closing body shock absorber according to any one of claims 1 to 4, wherein the arm portion is configured to be positioned below the damper of the main body portion.

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