JP3325659B2 - Door shock absorber - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shock absorber for absorbing an impact when a door for opening or closing an opening of office equipment such as cabinets or furniture, a window of a building, a rear opening of a car, or the like is closed. The present invention relates to a shock absorber suitable for a door pivotally operated between a position extending substantially horizontally to open an opening and a position extending substantially vertically downward to close the opening.

[0002]

2. Description of the Related Art Conventionally, a cabinet for storing office documents and the like is provided with a door for opening and closing an opening formed on the front surface of a main body of the cabinet, and an upper edge of the door is rotatably connected to an upper edge of the opening. A configuration is known in which the door is pivotally operated between a position extending substantially horizontally to open the opening and a position extending substantially vertically downward to close the opening, and the opening is opened and closed. I have.

[0003] In such a cabinet, when the door is closed, a rotational moment acts on the door, so that the door collides with the periphery of the opening, so that a large impact is applied to the door and the cabinet body and a large impact is applied. A sound is generated.

[0004] In order to solve such inconveniences, it has been considered to absorb a shock when the door is closed by a shock absorber such as a rotary damper.

[0005]

However, simply attaching a rotary damper or the like between the cabinet body and the door has the following problems. That is, as described above,
In a configuration in which the door rotates between a position that extends substantially horizontally and a position that extends substantially vertically downward, the rotational moment acting on the door is maximum when the door is opened, gradually decreases as the door is closed, and gradually closes. At time, it is 0.

For this reason, in the final stroke of the closing operation of the door, the door receives a reaction force such as a frictional resistance of a rotary damper or the like, and the door does not close to the end. Was a very incomplete shock absorber, which could absorb the water but could not completely close the door.

The present invention has been made in consideration of the above-described conventional problems, and has a structure in which an absorber is used to absorb an impact when the door is closed. The object of the present invention is to provide a complete shock absorber by adopting the mechanism described above so that the door closes smoothly to the end.

[0008]

SUMMARY OF THE INVENTION Therefore, the present invention provides a method of manufacturing a semiconductor device, comprising: an upper edge which is rotatably connected to an upper edge of an opening; A shock absorbing device that is rotatably moved between a position extending substantially vertically below and that absorbs an impact when the door that opens and closes the opening is closed, and is attached to the opening forming side, and the door inner surface. And an opening formed so as to rotate about an axis that is eccentric upwardly with respect to the center, the absorber being provided at a position in contact with the operating rod tip surface of the absorber. An eccentric cam supported on the side,
A connecting arm having one end rotatably connected to the inner surface of the door and the other end connected to the outer peripheral surface of the eccentric cam.

[0009]

In the above construction, when the door is opened at a position where the door extends substantially horizontally, the eccentric cam has an outer peripheral surface.
Abut on the tip of the working rod of the absorber to
Supported in a non-rotating state.

In this state, when the door is closed, the eccentric cam rotates about the eccentric shaft via the connecting arm in accordance with the rotation of the door, and the eccentric cam lifts by the rotation. Pushes the working rod of the absorber. As a result, the door receives the reaction force from the absorber via the eccentric cam and the connecting arm , and the door receiving the rotational moment closes gently without suddenly closing. Until the rotation angle of the door, that is, the cam angle reaches a predetermined angle, the cam lift gradually increases, and during this time, the state in which the door closes gently is continued. As the door approaches the opening and closes to the closing end, the rotational moment applied to the door decreases, and when the cam angle exceeds a predetermined angle, the cam lift gradually decreases this time. As a result, the force of pressing the working rod of the absorber by the eccentric cam is reduced, and the eccentric cam and the connecting arm are reduced .
The reaction force from <br/> to decrease from the absorber to receive the door via the arm, the door is rapidly closed to end the rotational moment and the inertia. That is, in the end closed the door, because that there is no buffering action of the absorber, the door will be closed until the end.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows an embodiment in which the shock absorber of the present invention is applied to a cabinet door. In this figure, an opening 2 is formed on the front surface of a cabinet body 1, and a rectangular plate-like door 3 for opening and closing the opening 2 is provided. An upper edge of the door 3 is rotatably connected to an upper edge of the opening 2 via a hinge 4. In this case, the door 3 is rotated between a horizontally extending position A for opening the opening 2 and a vertically extending position B for closing the opening 2 so as to open and close the opening 2. Has become.

In the cabinet having such a structure, a shock absorber for absorbing an impact when the door 3 is closed is provided as follows. That is, an absorber 5 is fixedly attached to a side portion inside the cabinet body 1. This absorber 5 is interlocked with a piston rod 5b as an operating rod connected to the piston by receiving a large liquid resistance of a viscous liquid by a sliding operation of a piston (not shown) provided inside the main body 5a. This is a configuration in which the shock of a moving object is absorbed.

The absorber 5 is disposed on the inner surface of the door 3 with its central axis horizontal so that the distal ends of the piston rods 5b face each other, and its main body 5a is provided on a side portion inside the cabinet main body 1. 6 is fixedly attached. In addition,
A contact member 7 with which an eccentric cam to be described later contacts is attached to the tip of the piston rod 5b.

A front end surface of the piston rod 5b of the absorber 5 is provided on a side inside the cabinet body 1.
That is, the eccentric cam 8 is provided at a position where it abuts on the distal end face of the abutting member 7 and is supported to rotate about an axis b that is eccentric by a predetermined distance L upward with respect to the center a. .

The eccentric cam 8 is formed in a disk shape having a predetermined thickness, and the rotation center axis b is rotatably supported on a mounting member 9 which is mounted hanging down on an upper portion inside the cabinet body. Is done.

A connecting arm 11 is provided, one end of which is rotatably connected to a side of the inner surface of the door 3 via a bracket 10 and the other end of which is connected to the outer peripheral surface of the eccentric cam 8.

Here, the relationship among the absorber 5, the eccentric cam 8 and the connecting arm 11 is specifically set as follows. That is, the contact member 7 of the absorber 5 is set to abut on an intersection d between the horizontal line c passing through the center a of the eccentric cam 8 in the natural state and the outer peripheral surface of the eccentric cam 8. The connecting arm 11 extends along a line e connecting the connecting portion on the inner surface of the door 3 and the center a of the eccentric cam 8, and its length is such that the eccentric cam 8 is in a natural state when the door 3 is open. It is set so as to be supported in a non-rotating state.

The eccentric cam 8 is designed to have a lift characteristic shown by a cam lift diagram as shown in FIG. This cam lift diagram shows the rotation angle (cam angle) of the eccentric cam 8 and the cam lift (the outer peripheral surface of the eccentric cam 8 and the contact member 7).
FIG. 9 is a graph showing a relationship between the cam lift gradually increases until the cam angle reaches 80 degrees, and thereafter the cam lift gradually decreases. Is set to

Next, the operation of the shock absorber having such a configuration will be described. When the opening 3 is opened by setting the door 3 to a position A extending substantially horizontally as shown by a solid line in FIG.
Makes the outer peripheral surface thereof come into contact with the contact member 7 of the absorber 5
And is supported in a natural state (non-rotational state) .
That is, the cam angle is 0 and the cam lift is 0 (the eccentric cam 8 original position).

In this state, when the door 3 is closed, the eccentric cam 8 is connected to the eccentric shaft b via the connecting arm 11 in accordance with the rotation of the door 3.
And the eccentric cam 8 is lifted by the rotation. Thus, the piston rod 5 b of the absorber 5 is pressed by the eccentric cam 8 via the contact member 7. In this case, the door 3 receives the reaction force from the absorber 5 via the eccentric cam 8 and the connecting arm 11, and the door 3 receiving the rotational moment closes gently without closing suddenly. Door 3
The cam lift gradually increases until the rotation angle, i.e., the cam angle reaches 80 degrees. During this time, the state in which the door 3 is slowly closed is continued. When the door 3 approaches the opening 1 and approaches the end of closing, the rotational moment applied to the door 3 decreases, and when the cam angle exceeds 80 degrees, the cam lift gradually decreases. As a result, the force of the eccentric cam 8 pressing the piston rod 5b of the absorber 5 via the contact member 7 is reduced, and the reaction force from the absorber 5 received by the door 3 via the eccentric cam 8 and the connecting arm 11 is also reduced . However, the door 3 is quickly closed by the rotational moment and the inertia. That is, the end closing of the door 3, because the buffering action is not of the absorber 5, the door 3 will be closed until the end.

The door 3, the connecting arm 11, and the eccentric cam 8 indicated by the two-dot chain line in FIG. 1 show these positions when the door 3 is closed.

According to this configuration, as described above, the door 3
During the closing start stroke with a large rotational moment, the door 3 is subjected to the buffering action of the absorber 5 so that the door 3 is closed gently. Since the door 3 is closed to the end without receiving the shock, it is possible to provide a complete shock absorber that can completely close the door 3 while reliably buffering the impact when the door 3 is closed. .

In the above embodiment, an example in which the shock absorber of the present invention is applied to the cabinet door 3 has been described. However, the present invention is not limited to this, and other office equipment and furniture openings, building windows, The present invention can be similarly applied to a door that opens and closes a rear opening and the like of an automobile.

As described above, the present invention has been described with reference to the specific embodiments. However, the present invention is not limited to these embodiments, and is attached to the present invention by a person skilled in the art. It should be noted that various changes and modifications can be made without departing from the scope of the claims.

[0025]

As described above, according to the door shock absorbing device of the present invention, the shock absorbing when the door is closed is absorbed by using the absorber, and the absorber is closed with the closing operation of the door. By adopting a unique mechanism using an eccentric cam for the operating part, the door is smoothly closed to the end, which is a great advantage in providing a complete shock absorber.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment of a door shock absorber according to the present invention.

FIG. 2 is a cam lift diagram showing a relationship between an eccentric cam rotation angle and a cam lift in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cabinet main body 2 Opening 3 Door 5 Absorber 5b Operating rod 8 Eccentric cam 11 Connecting arm

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 61-203998 (JP, U) JP-B 52-5906 (JP, B1) (58) Fields investigated (Int. Cl. ⁷ , DB name) E05F 5/02 E05F 3/04

Claims (1)

(57) [Claims] An upper end edge is rotatably connected to an upper edge portion of an opening, and a position between a position extending substantially horizontally for opening the opening and a position extending substantially vertically downward for closing the opening is provided. What is claimed is: 1. A shock absorber that is rotatably operated to absorb an impact when a door that opens and closes an opening is closed, wherein the absorber is attached to the opening forming side, and an end of an operating rod faces an inner surface of the door. An eccentric cam disposed at a position in contact with a tip end surface of an operating rod of the absorber, and supported on the opening forming side so as to rotate about an axis eccentric upward with respect to a center; And a connecting arm having the other end rotatably connected to the inner surface of the door and the other end connected to the outer peripheral surface of the eccentric cam.