JPH0515020Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an opening/closing structure for the door of a case for storing food, tableware, cleaning supplies, and other various articles.

[Prior art]

The door opening/closing structure of a storage case with a door is often such that the upper end of the inner surface of the door that covers the opening of the case body is rotatably attached on both sides, and the door is opened and closed by rotating. Many improvements have been made to the bearings that form the moving parts.

For example, a recess with elastic force is provided in the bearing part, a pin that engages with the recess is provided in the door, and the recess and the pin are elastically engaged and maintained in the fully open and fully closed positions of the door. Something is being devised.

[Problem that the invention attempts to solve]

However, in the case of a type in which the recess and the pin are elastically engaged, the rotating pin provided on the door rotates while pushing up the elastic piece that formed the recess, and when it reaches the recess, the pin engages elastically. Because of this, there is a lack of braking force in the closing direction of the door, and an impact noise is generated when the door is closed. In addition, the elastic force on the opening side of the door is strong, and when the door opens and closes at the end, the movement becomes fast and recoils, causing contact with the opening of the case body and generating impact noise.

The present invention solves the above-mentioned problems, and when the door is rotated to open and close, the door opens and closes smoothly, the braking is smooth especially when closing, and the impact noise is reduced. The purpose is to achieve this without increasing the number of parts and to improve quality while maintaining low costs.

[Means for solving problems]

In the present invention, bearing members are fixed to the inner walls on both sides of the opening of the case body so as to face each other on the same axis, and these bearing members have a pair of bearing members formed on both sides of the upper end of the inner surface of the door covering the opening of the case body. In the storage case into which the shaft of the fin portion is rotatably inserted, the bearing member is provided with a hole into which the shaft is inserted, and a circumferential portion having a protrusion protruding from the center of the hole is provided. a concentric arc is formed on the circumferential portion with a gap therebetween, and a protruding edge portion forming a part of a concentric circular arc is vertically symmetrically formed, and a circular arc of the bearing member is formed on the fin portion with a center around the shaft axle. providing a circular arc-shaped part with a wave-shaped cam shape that slides between the peripheral part and the flange part, and forming recessed parts that engage with the protrusions on the circumferential part of the bearing member at the upper and lower parts of the circular arc-shaped part, Further, in the door opening/closing mechanism of the storage case, an abutting part is formed on the inner surface of the straight side face facing the circumferential part of the bearing member and between the circumferential part and the protruding edge part. be.

〔Example〕

An embodiment of the present invention will be described based on the drawings. In FIGS. 1 to 3, 1 indicates a case body, and a pair of inner walls 2 on both sides of the upper part of the opening of the case body 1 are provided. The bearing members B are opposed to each other on the same axis and fixed so as not to rotate.

Fins 4 are provided on both sides of the upper end of the inner surface of the door 3 that covers the opening of the case body 1, and the fins 4 are provided with a shaft 5 that is rotatably fitted into the bearing member B. A handle 6 is provided below the door 3.

In addition, in the illustrated example, the lower part of the case body 1 is
A storage area for a drawer container 7 for storing seasonings such as salt and sugar is shown.

The bearing member B is made of a hard material such as synthetic resin, has a shape slightly larger than a semicircle and is divided vertically into a circle, and is formed on the inner wall 2 of the case body 1, as shown in FIGS. 4 and 5. At the center of the inner surface of the bearing member B, there is a shaft provided on a pair of fins 4 formed on both sides of the upper end of the inner surface of the door 3. A bottomed or penetrated hole 9 into which the mandrel 5 is inserted is provided.

Further, the bearing member B is formed with a circumferential portion 11 having a protrusion 10 protruding from the center around the hole 9, and the circumferential portion 11 is vertically symmetrical with a gap in between A protruding edge 12 that forms part of an arc concentrically with
is formed.

This protruding edge portion 12 fixes the bearing member B so that it does not rotate unintentionally.

Further, as shown in FIG. 6, a part of a circular arc centered around the shaft 5, preferably a is an arc slightly larger than approximately 1/4 of the circumference,
A corrugated cam-shaped arcuate portion 14 is provided near both ends thereof, in which a recess 13 into which the projection 10 at the center of the bearing member B engages is formed.

Then, the shaft 5 of the fin portion 4 is fitted into the hole 9 at the center of the bearing member B, and inserted between the circumferential portion 11 and the protruding edge portion 12 as shown in FIG. The portion 14 extends along the inside of the protruding edge portion 12 from the circumferential portion 1.
1, and at the closed position of the door 3, the arc-shaped part 1
4 engages with the protrusion 10 of the circumferential part 11 (solid line position in FIG. 10 (position indicated by the chain line in FIG. 6b).

Furthermore, since the abutting portion 16 is formed on the inner surface of the straight side surface portion 15 facing the circumferential portion 11 of the bearing member B and between the circumferential portion 11 and the protruding edge portion 12, the door It is possible to reliably suppress the reaction at the opening/closing end point of No. 3.

To attach the door 3 to the case body 1, the pair of fins 4 formed on both sides of the upper end of the inner surface of the door 3 are elastically deformed inward to narrow the distance between the shafts 5 on both sides, and the shaft center Insert the rod 5 into the hole 9 of the bearing member B fixed to the inner wall 2 of the case body 1, and
4 is positioned between the circumferential portion 11 and the protruding edge portion 12, the deformation of the fin portion 4 is released and the fin portion 4 is returned to its original shape.

Therefore, when the door 3 is closed, the arcuate portion 14 provided on the fin portion 4 formed at the upper end of the inner surface of the door 3 is in the position shown by the solid line in FIG. is the protrusion 1 of the circumferential portion 11 of the bearing member B.
0, and the closed state of the door 3 is maintained.

When opening the door 3, when the door 3 is rotated upward using the handle 6, the arcuate portion 14 slides while contacting the protrusion 10, and the arcuate portion 14 slides in contact with the protrusion 10, and the arcuate portion 14 slides downward at the position shown by the chain line in FIG. 6b. The recess 13 is engaged, the door 3 is fully opened, and the open state is maintained.

Further, when closing the door 3, by rotating the door 3 with the handle 6 in the opposite direction to the above-mentioned opening, the door 3 will be fully opened and the above-mentioned closed state will be maintained.

When opening and closing such a door 3, since the shape of the arcuate portion 14 is a wave-shaped cam, the arcuate portion 1
4 slides along the inside of the protrusion 12 of the bearing member B, always in contact with the protrusion 10, and as the rotation angle of the door 3 changes, the contact point of the arcuate part 14 with the protrusion 10 gradually changes, The engagement and disengagement between the protrusion 10 and the recess 13 is carried out easily, with very little impact noise, and because the abutting portion 16 is formed,
Because we were able to suppress the recoil at the end of opening and closing the door,
This provides a comfortable feeling when putting in and taking out stored items.

The door opening/closing mechanism of the present invention as described above allows the bearing member B to be adjusted by appropriately setting the cam shape of the arcuate portion 14 of the door, even for doors with different opening degrees or doors installed on an inclined part. Can be shared.

In addition to the above examples, double door type,
Of course, the present invention can also be applied to cases with doors such as double-opening doors, single-opening doors, bookshelf doors, and tool boxes.

[Effect of idea]

As described above, according to the present invention, the opening/closing operation of the door is always performed stably and smoothly due to the specially shaped arc-shaped part that slides while receiving elasticity due to the relationship with the circumferential part. , impact noise is extremely reduced, unnecessary recoil can be suppressed at the end of opening and closing of the door, and there is no increase in the number of parts compared to conventional products, so it is possible to improve quality at low cost. .

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is an overall front view, Fig. 2 is a partially cutaway side view of the whole, and Fig. 3
The figure is an explanatory diagram of the installation of the case body and the door, Figure 4a is a plan view of the bearing member, Figure 4b is a back view of the bearing member, Figure 4c is a sectional view taken along the - 5
The figures are an enlarged plan view of the bearing member, Fig. 6a is a front view of the vicinity of the upper end of the door, Fig. 6b is a side view of Fig. 6a, and Fig. 6c is a partially enlarged view of Fig. 6b. be. 1...Case body, 2...Inner wall, 3...Door, 4
...Fin part, 5...Axle shaft, 6...Handle, 7...
Drawer container, 8... fixed part, 9... hole, 10...
...Protrusion, 11...Circumferential portion, 12...Protrusion, 13
... recessed part, 14 ... arcuate part, 15 ... side part,
16...Abutting portion, B...Bearing member.

Claims (1)

[Scope of utility model registration request] Bearing members are fixed to the inner walls on both sides of the opening of the case body so as to face each other on the same axis, and these bearing members are attached to the axes of a pair of fins formed on both sides of the upper end of the inner surface of the door covering the opening of the case body. In the storage case into which the mandrel is rotatably inserted, the bearing member is provided with a hole into which the mandrel is inserted, and further a circumferential part having a protrusion protruding from the center is formed around the hole, A protruding edge forming a part of a concentric arc is vertically symmetrically formed at the circumferential portion with a gap therebetween, and the protruding edge portion is formed in the fin portion with a circumferential portion of the bearing member and the protruding edge is centered on the shaft axle. A circular arc-shaped portion having a wave-shaped cam shape that slides between the edges is provided, and a recessed portion that engages with a protrusion on the circumferential portion of the bearing member is formed at the upper and lower portions of the circular arc-shaped portion, and further, the bearing member A door opening/closing mechanism for a storage case, characterized in that an abutting part is formed on the inner surface of a straight side face facing the circumferential part and between the circumferential part and the protruding edge.