JP2919433B2 - Speed reducer for box lid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid deceleration shock absorber used for a box such as a trash can installed in a station or a plaza.

[0002]

2. Description of the Related Art By incorporating a rotary damper between a lid and a box body between a lid and a box body, while having a rotational resistance in one direction of zero or extremely small, a moderate deceleration effect when the lid is closed. It is already known to provide a shock-absorbing effect as disclosed in JP-A-6-74277.

However, in this conventional apparatus, a circular gear is directly fixed to a hinge shaft connecting the lid to the box body, and the circular gear is meshed with a damper gear of a rotary damper fixed to the box body. Must be formed in a flat box shape with a depth, and the internal volume on the lid side is not usually used as a storage space, so the effective storage capacity is not enough for the overall bulk of the lid and the box body. Less. Further, since almost half of the circular gear is exposed to the outside of the lid, the appearance is not good, and foreign matter may be caught in the circular gear and cause a failure.

Moreover, in this conventional apparatus, there is no means for finely adjusting the relative positions of the circular gear and the damper gear, so that there are errors in the molding dimensions of the lid and the box body, and the mounting positions of the rotary damper and the hinge shaft. If present, the teeth of the circular gear and the teeth of the damper gear may not be optimally meshed. In such a case, a loss occurs in the transmission of the rotational force via the circular gear and the damper gear, which has an adverse effect on the deceleration and the damping action.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an external appearance that is good, there is no foreign substance biting accident, and the loading and unloading of the stored material is facilitated.
An object of the present invention is to provide a deceleration shock absorber for a lid of a box , which can maximize the effective storage capacity and can always engage the gears in an optimum state.

[0006]

Means for Solving the Problems To be described using reference numerals in the accompanying drawings, in the lid deceleration shock absorber of the present invention,
A support arm plate 4 is fixed horizontally on the back side of the upper edge plate portion 3 of the opening 2 of the box body 1, and a damper attachment plate 5 is fixed on the upper surface side of the support arm plate 4, and is rotated on the damper attachment plate 5. A vertical plate portion 8 to which the fixed case 7 of the damper 6 is fixed is protruded,
A hinge mounting plate 10 is fixed to the rear side of the upper end of the lid 9 that opens and closes the opening 2 at a position obliquely below the damper mounting plate 5, and a hinge is mounted on the upper surface side of the upwardly inclined seat plate 11 of the hinge mounting plate 10. 12 and the upper wing plate 14 of the hinge 12 is fixed to the lower surface side of the support arm 4.
A sector gear 16 having teeth 17 formed on an arc centered on the horizontal shaft pin 15 is fixed to the upper surface side of the seat plate portion 11, and the teeth 17 of the sector gear 16 are attached to the horizontal rotor 19 of the rotary damper 6. From the obliquely lower side with the tooth row 24 of the damper gear 20 fixed to the end of the rotary damper gear 20 when the lid 9 is closed.
Gives rotational resistance.

To fix the rotary damper 6 to the damper mounting plate 5, three receiving holes 21 are provided on the outer circumference of the fixed case 7 of the rotary damper 6 on the same circumference, and the rotary plate 6 is fixed to the vertical plate 8 of the damper mounting plate 5. Three mounting holes 22 are provided on the same circumference corresponding to the receiving holes 21, and one of the three mounting holes 22 at the center is located at the point of engagement between the sector gear 16 and the damper gear 20 and the diameter. The two mounting holes 22, 22 are arranged symmetrically with respect to the mounting hole 22 in the central portion, and are formed as long holes in the circumferential direction. 21 is passed through the screw 23 for fastening and fixing.

If there is some deviation in the relative positions of the sector gear 16 and the damper gear 20 due to manufacturing errors of the box body 1, the support arm plate 4, the damper mounting plate 5, etc.
The relative position between the sector gear 16 and the damper gear 20 is finely adjusted by rotating the fixed case 7 of the rotary damper 6 right and left about the mounting hole 22A at the center of the vertical plate portion 8 of the damper mounting plate 5. When the teeth 17 of the sector gear 16 and the teeth 24 of the damper gear 20 are optimally engaged by this adjustment operation, the screws 23 are tightened, and the fixed case 7 is fixed to the vertical plate 8.

When the lid 9 is pushed to the right in FIG. 1 for dust insertion, the lid 9 rotates counterclockwise around the horizontal shaft pin 15 of the hinge 12 and is opened. Since the sector gear 16 rotates counterclockwise around the horizontal shaft pin 15 in association with the opening rotation, the damper gear 20 meshing with the fan gear 16 is rotated clockwise. During this open rotation, the rotation resistance of the rotation damper 6 is zero or extremely small. When the trash throws away from the lid 9, the lid 9 closes and rotates clockwise about the horizontal pin 15 due to its own weight. At the time of this closing rotation, since the rotation resistance is given by the rotary damper 6, the lid 9 is closed and rotated in a decelerated state, and the hands or fingertips of the duster are caught between the lid 9 and the box body 1. Never do. Also, at the end of the closing operation, the lid 9 violently collides with the box body 1,
No noise is generated or the surface coating of the lid 9 and the box body 1 is not damaged.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The rotary damper 6 used in the illustrated embodiment utilizes the viscous resistance of a fluid, and a rotor 19 is coaxially inserted into a rotary case 7 and provided on an inner peripheral surface of a fixed case 7. While the fixed vane 25 is fixed, the movable vane 26 is fixed to the rotor 19 to divide the space between the inner peripheral surface of the rotating case 7 and the outer peripheral surface of the rotor 19 into two chambers and to connect the two chambers. The orifices 27a and 27b are provided on the fixed vane 25, the valve body 28 for opening and closing only one orifice 27a is provided on the fixed vane 25, and both chambers are filled with a viscous fluid 29.

In the rotary damper 6, when the rotor 19 rotates clockwise as shown in FIG. 4 accompanying the closing rotation of the lid 9, the movable vane 26 is moved to the one chamber 30a.
It rotates while compressing the viscous fluid 29 therein. Since the valve body 28 is pressed against the fixed vane 25 by the compressed viscous fluid 29, one orifice 27a is closed. However, the other orifice 27b is the valve body 2
The compressed viscous fluid 29 flows into the other chamber 30b through the orifice 27b because it is provided at a position not blocked by the nozzle 8. Therefore, the rotation of the movable vane 26, that is, the rotation of the rotor 19, is gently performed by the action of the viscous resistance of the fluid and the square resistance of the velocity , so that the lid 9 is decelerated and buffered.

When the rotor 19 rotates counterclockwise as shown in FIG. 4 accompanying the opening rotation of the lid 9,
The movable vane 26 rotates while compressing the viscous fluid 29 in the other chamber 30b. The valve body 28 is pushed away from the fixed vane 25 by the compressed viscous fluid 29,
The orifice 27a is opened. Therefore, the movement of the viscous fluid 29 from the chamber 30b to the chamber 30a is made through both the two orifices 27a and 27b. Therefore, the rotation of the movable vane 26, that is, the rotation of the rotor 19, is rapidly performed because the action of the resistance of the fluid is greatly reduced. The operation principle and structure of the rotary damper 6 are not limited to those described above, and a known rotary damper can be appropriately used.

The horizontal body portion of the damper mounting plate 5 is provided with three through holes 31, and the fastening of the damper mounting plate 5 to the support arm plate 4 is fixed by screws 32 and nuts 38 passing through the through holes 31. Done. The horizontal arm plate 4 is formed separately from the box body 1, and a vertically bent portion 4 a is fixed to the edge plate portion 3 by screws 33 and nuts 36. The vertical plate portion 8 of the damper mounting plate 5 is composed of a C-shaped plate portion 8a bent to the upper surface side and a thin plate portion 8b bent to the lower surface side. The receiving hole 21 on the fixed case 7 side of the rotary damper 6 is formed as a screw hole. Note that the support arm plate 4 can be formed integrally with the box body 1.

The hinge mounting plate 10 is provided with two through holes 34 on the left and right sides with the seat plate 11 interposed therebetween.
5 and nut 37. The sector gear 16 is fixed to the hinge mounting plate 10 via a gear mounting plate 18. The sector gear 16 is fixed to the gear mounting plate 18 by screwing a screw 45 into a screw hole 44 at the base end from the through hole 43 at the end of the gear mounting plate 18. The gear mounting plate 18 has three through holes 41, and the lower mounting plate 13 of the hinge 12 has three through holes 40. Gear mounting plate 1
Reference numeral 8 denotes a through hole 41,
The nut 35 and the screw 35 passing through the through hole 40 and the through hole 39 are fastened and fixed to the seat plate portion 11. The upper blade 14 of the hinge 12 has three through holes 47. The screw 32 is also inserted into the through hole 47, and the upper blade 14 is fixedly fastened to the support arm plate 4 together with the damper mounting plate 5.

[0015]

According to the first aspect of the present invention, the support arm plate 4 is horizontally fixed to the back side of the upper edge plate 3 of the opening 2 of the box body 1. A vertical plate portion 8 to which the fixed case 7 of the rotary damper 6 is fixed protrudes from a damper mounting plate 5 fixed to the upper surface of the cover 9, and a hinge mounting plate 10 is provided obliquely on the rear side of the upper end of the lid 9. The lower wing plate 13 of the hinge 12 is fixed on the upper surface side of the seat plate portion 11 of the hinge mounting plate 10, and the upper wing plate 14 of the hinge 12 is fixed on the lower surface side of the support arm 4, and the fan shape is fixed. The gear 16 is fixed to the upper surface side of the seat plate portion 11, and the sector gear 16 is engaged with the damper gear 20 at the end of the horizontal rotor 19 of the rotary damper 6 from a diagonally lower side. Are both housed inside the box body 1. Since it is not exposed to the outside at all, the appearance is good, and there is no possibility that a foreign matter is caught in the gear and causes a failure.

Further, since the rotary damper 6 and the sector gear 16 are drawn into the space obliquely above the lid 9 as described above, the opening of the lid 2 is greatly jumped without being obstructed by the rotary damper 6 or the like. It is possible to carry out the operation of putting up and taking out dust and the like into the box body 1 easily.
The lid 9 does not need to be formed in a flat box shape having a depth, but may be a simple flat plate. Therefore, when the overall bulk volume of the lid 9 and the box body 1 is constant, the box body has the bulk volume. By allocating most, a large effective storage capacity can be secured.

In the deceleration damping device according to the second aspect of the invention, three receiving holes 21 are provided on the outer periphery of the fixed case 7 of the rotary damper 6 on the same circumference, and the three receiving holes 21 are formed on the vertical plate 8 of the damper mounting plate 5. Three mounting holes 22 are provided on the same circumference in correspondence with the receiving holes 21,
One of the three mounting holes 22 is arranged such that one central portion 22A is diametrically opposed to the meshing point between the sector gear 16 and the damper gear 20, and the remaining two mounting holes 22 are formed in the mounting holes 22A. And the rotary damper 6 is fixed to the damper mounting plate 5 by screws 23 passing through the three mounting holes 22 and the receiving holes 21 so as to be firmly fixed. By rotating the fixed case 7 of the rotary damper 6 right and left around the mounting hole 22A, the relative position between the sector gear 16 and the damper gear 20 can be finely adjusted.
And the tooth row 24 of the damper gear 20 can be meshed in an optimal state. Therefore, the sector gear 16 and the damper gear 2
The transmission of the rotational force via 0 is performed smoothly and precisely without loss.

[Brief description of the drawings]

FIG. 1 shows a box using a deceleration shock absorber for a lid according to the present invention.
Scan an essential part longitudinal cross sectional view of the lid is in the closed position.

FIG. 2 is an exploded perspective view of a hinge, a hinge mounting plate, a gear mounting plate, and a back gear used in the speed reduction buffer device.

FIG. 3 is a perspective view of a damper mounting plate used in the deceleration buffer.

FIG. 4 is a cross-sectional view of a main part of a rotary damper used in the deceleration damping device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Box body 2 Box body opening 3 Upper edge plate of opening 4 Support arm plate 5 Damper mounting plate 6 Rotary damper 7 Fixed case of rotary damper 8 Vertical plate of damper mounting plate 9 Lid 10 Hinge mounting plate 11 Hinge Seat plate portion of mounting plate 12 Hinge 13 Lower wing plate of hinge 14 Upper wing plate of hinge 15 Horizontal axis pin of hinge 16 Sector gear 17 Teeth row of sector gear 18 Gear mounting plate 19 Horizontal rotor of rotary damper 20 Damper gear 21 Fixed case Receiving hole in outer peripheral part 22 Mounting hole of damper mounting plate 23 Fixing screw 24 Teeth row of damper gear

Claims (2)

(57) [Claims] 1. A support arm plate 4 is fixed horizontally on the back side of an upper edge plate portion 3 of an opening 2 of a box body 1, and a damper mounting plate 5 is fixed on an upper surface side of the support arm plate 4. A vertical plate portion 8 to which the fixed case 7 of the rotary damper 6 is fixed protrudes from the mounting plate 5, and a hinge mounting plate 10 is provided obliquely below the damper mounting plate 5 on the rear side of the upper end of the lid 9 that opens and closes the opening 2. The lower wing plate 13 of the hinge 12 is fixed to the upper surface side of the upwardly inclined seat plate portion 11 of the hinge mounting plate 10, and the upper wing plate 14 of the hinge 12 is fixed to the lower surface side of the support arm 4. Then, a sector gear 16 having teeth 17 formed on an arc centered on the horizontal axis pin 15 of the hinge 12 is fixed to the upper surface side of the seat plate 11, and the teeth 17 of the sector gear 16 are rotated by the rotary damper 6. Of the damper gear 20 fixed to the end of the horizontal rotor 19 obliquely downward. Engagement from box you provide a rotational resistance by the rotary damper 6 during closure of the lid 9
Speed reduction shock absorber for the lid 2. Three receiving holes 21 are provided on the outer periphery of the fixed case 7 of the rotary damper 6 on the same circumference, and three receiving holes 21 are formed on the vertical plate 8 of the damper mounting plate 5 in correspondence with the receiving holes 21. Are provided on the same circumference, and one of the three
Are arranged so as to be diametrically opposed to the meshing point between the sector gear 16 and the damper gear 20, and the remaining two mounting holes 22,
22 are arranged symmetrically with respect to the mounting hole 22 in the central portion, and are formed as elongated holes in the circumferential direction.
2. The deceleration shock absorber for a lid according to claim 1, wherein the rotary damper 6 is fastened and fixed to the damper mounting plate 5 by screws 2 passing through the holes 2 and the receiving holes 21.