JP2012201314A - Hinge structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hinge structure having a high degree of freedom in a bending angle of a coupling part between boards, having stable restoring force, and effective in reducing weight, a space and cost.SOLUTION: This structure of an integral hinge 30 is provided by coupling the first board 10 and the second board 20 by a thin part. A storage recessed part straddling the first board 10 and the second board 20 is formed on a surface of becoming the outside when bending in the orthogonal direction to the integral hinge 30, and a pull spring member 40 is arranged in the storage recessed part. One end part of the pull spring member 40 is fixed to the first board 10, and the other end part is fixed to the second board 20.

Description

  The present invention relates to a hinge structure of a connecting portion connecting a plurality of boards, and in particular, an integral hinge portion is formed by providing a thin portion connecting a plurality of boards, and between the boards connected via the integral hinge portion. Further, the present invention relates to a hinge structure in which an elastic force is applied in a direction in which the boards are restored to a flat shape.

A hinge structure in which a pair of boards or members are connected via an integral hinge portion so as to be rotatable with respect to each other at a thin portion is known in the field of resin molded products.
In this way, when a pair of boards or members are connected via an integral hinge portion, the other board can be folded around the hinge portion with respect to one board and return from the folded state to a flat shape. For example, the luggage board structure of an automobile disclosed in Patent Document 1 is publicly known.

However, in the hinge part structure disclosed in Patent Document 1, a spring member is disposed in a direction parallel to the integral hinge part, and the pair of boards are turned from a bent state to a planar shape by the torsional restoring force of the spring member. However, the following technical problems were encountered.
As described in the publication, when the auxiliary board is bent with respect to the luggage board, the entire coil portion of the coil spring is freely deformed obliquely (torsional deformation).
Therefore, first of all, in order to set the restoring force to be generated when the auxiliary board is bent even a little with respect to the luggage board, it is realistic that the restoring force becomes zero when the auxiliary board is in a horizontal state with respect to the luggage board. Since no restoring force is generated when the auxiliary board is bent extremely upward, it is necessary to apply a preliminary torsional force at a level that acts in a direction in which the auxiliary board is bent downward. It was difficult to maintain.
Secondly, as the bending angle of the auxiliary board with respect to the luggage board increases, the amount of torsional deformation of the entire coil portion increases, so that the angle of inclination of the entire coil portion also increases.
However, since the width of the storage space of the coil member is limited and the amount of twist is also limited, the end of the coil portion is fixed to the portion where both ends of the coil member disclosed in the publication are respectively fixed by resin plates. It was necessary to provide a slide mechanism so that the part moved to the center of the coil part to some extent.
The welding of the end of the coil member with the resin plate so as to be slidable increases the number of parts and the structure, which causes high costs.
In addition, there is a problem that an abnormal sound is generated due to the slide of the slide portion.

JP 2008-239086 A

  It is an object of the present invention to provide a hinge part structure that has a high degree of freedom in the bending angle of the connecting part between the boards, has a stable restoring force, and is effective for achieving weight reduction, space saving, and cost reduction. And

  The present invention relates to a structure of an integral hinge part in which a first board and a second board are connected by a thin-walled part, and the first board and the second board are arranged on a surface that is orthogonal to the integral hinge part and is outside when folded. An accommodation recess that spans two boards is formed, a tension spring member is arranged in the accommodation recess, one end of the tension spring member is fixed to the first board, and the other end is fixed to the second board It is characterized by that.

Here, the tension spring member refers to a spring member that generates a restoring force in the contraction direction when a tensile force is generated between both ends of the spring member, and a coil spring is generally exemplified as an example.
A feature of the present invention resides in that this tension spring member is used as a restoring force against bending of an integral hinge portion provided between a pair of boards.
The tension spring member is originally designed to generate an elastic restoring force in the contraction direction when elongation in the tension direction occurs between both ends of the coil part. If the spring member is arranged in a direction perpendicular to the integral hinge part and both ends are fixed to adjacent boards, the pulling spring member is bent by the bending of the board and at the same time a tensile force is generated in the spring part. Is focused on.

  Here, the first and second boards are laminated boards in which a core material is interposed between the front and back surface skin materials and the skin material, and an integral hinge portion is formed on one skin material side of the front and back surfaces, It is also possible to form the housing recess by pressing from the other skin material side.

In the present invention, an accommodation recess is formed on a surface of the integral hinge portion that is bent outward in a direction perpendicular to the integral hinge portion, and a tension spring member is disposed in the accommodation recess, and both ends of the tension spring member are arranged. Since the parts are fixed to the corresponding boards, the following effects are obtained.
First, if both ends of the tension spring member are fixed to each board so that the tension spring member is in a free state when both boards are flat, a pair of tension springs can be used regardless of the spring constant. The board is not bent in the opposite direction such that the tension spring member is on the inside.
Second, when the conventional torsional force is used, a sufficient bending angle cannot be obtained unless a fixing portion with a slide mechanism is provided at both ends of the spring member, whereas the hinge portion according to the present invention is used. Since the structure does not require such a slide mechanism, the fixing structure is simple and the cost can be reduced, and no abnormal noise is generated by the slide.
Further, when a resin laminated board is used as the board, the housing recess for the tension spring member can be easily formed by pressing or the like, which further contributes to lower costs.

The hinge structure of a board according to the present invention can be widely applied to products in which a plurality of boards are connected (consecutively provided) with an integral hinge and require a restoring force against bending.
For example, when applied to a luggage room behind a retractable seat back that falls to the front side of a rear seat of an automobile, a luggage board used for a cargo room floor called a trunk room, a trunk board, etc., the main board on the cargo compartment side The sub-board that is foldable (rotatable) can be arranged so as to follow the reclining angle of the seat back.

The example of the hinge part structure which concerns on this invention is shown, (a) shows the top view of the side which attached the tension spring member, (b) shows the AA sectional view. The state which bent a pair of board is shown. The example of a component structure of a hinge part is shown, (a) shows planar view, (b) shows side view. The example which applied the hinge part structure which concerns on this invention to the luggage board (trunk board) is shown.

  Although the example of the hinge part structure which concerns on this invention is demonstrated based on drawing below, a design change can be suitably performed in accordance with the meaning of this invention.

As shown in FIGS. 1 and 3, the hinge part structure according to the present invention connects the first board 10 and the second board 20 by the integral hinge part 30 at the thin part on the skins 11 and 21 side. A receiving recess 31 is formed in the direction orthogonal to the integral hinge portion 30 on the back surface 12 and 22 side.
A tension spring member 40 is disposed in the housing recess, one end 41 of the tension spring member 40 is fixed to the first board 10 by a first fixing tool 51 such as a rivet or screw, and the other end 42 is fixed. It fixes to the 2nd board 20 using the 2nd fixing tool 52 similarly to a 1st fixing tool.
In addition, although a fixed example by a rivet is shown in the present embodiment, the present invention is not limited to this.
In addition, the accommodating recess 31 may be a recess having a length that includes the fixing portions at both ends of the tension spring member. However, in order to generate a stable restoring force, only the coil portion of the tension spring member 40 is disposed in the accommodation recess. The end portions 41 and 42 are preferably fixed to the surfaces of the skin materials 12 and 22.
The depth of the accommodating recess 31 does not have to be completely accommodated, and may be an accommodating recess shallower than the outer diameter of the coil portion.

In this embodiment, the first and second boards 10 and 20 are resin boards in which core materials 13 and 23 are laminated in a sandwich structure between the skin materials 11 and 21 on the front surface and the skin materials 12 and 22 on the back surface. It has become.
When such a resin laminated board is used, the housing recess 31 can be easily formed simply by pressing with a punch or the like heated from above as shown in FIG.
At both ends 41, 42 of the tension spring member 40, hook portions folded back in a ring shape are formed, and rivets 51, 52 are inserted into the ring shape hook portions and riveted with fixing holes 12b, 22b. Although it is an example, it may be screwed with a screw or the like, and there is no restriction on the fixing method.
Also, the structure of the integral hinge part 30 is not particularly limited as long as the integral hinge part 30 has a thin-walled part at the inner side of the pair of boards.
In the present embodiment, the skin materials 12 and 22 are welded to the skin materials 11 and 21 on the opposite side together with the core materials 13 and 23 to form the inclined portions 21a and 22a, thereby forming an integral hinge.

When the first board 10 and the second board 20 are connected in this way, as shown in FIG. 2, for example, when the first board 10 bends (rotates) with respect to the second board 20, the tension spring member 40. Is bent so as to extend, and a restoring force is generated in the direction of shrinking (straightening).
When the restoring force of the tension spring member 40 is utilized, the degree of freedom of the bending angle of the first board 10 with respect to the second board 20 is high, and a stable restoring force can be obtained.

FIG. 4 shows an example in which the hinge structure of a board according to the present invention is applied to a luggage board (trunk board) of an automobile.
The rear seat 1 has a reclining seat back 2, and a luggage compartment or the like is provided behind the seat back 2.
A main board (first board) 10 is arranged on the floor of the cargo compartment, and a sub board (second board) 20 is connected to the floor using the hinge structure according to the present invention.
In this case, as shown in FIG. 4A, the sub board 20 follows the reclining angle of the seat back 2 due to the expansion and contraction of the pulling spring member 40, and the cargo space is shown in FIG. 4B. Thus, when the seat back 2 is tilted forward, the sub-board 20 becomes substantially horizontal in a plane with respect to the main board 10, so that the board is thin and lightweight and has a low-cost luggage board.

DESCRIPTION OF SYMBOLS 10 1st board 20 2nd board 30 integral hinge part 31 accommodation recessed part 40 tension spring member 51 1st fixing tool 52 2nd fixing tool

Claims (2)

It is the structure of the integral hinge part which connected the 1st board and the 2nd board with the thin part,
Forming an accommodation recess that spans the first board and the second board in the direction orthogonal to the integral hinge part and on the outer surface when bent,
A hinge part structure in which a tension spring member is disposed in the housing recess, one end of the tension spring member is fixed to the first board, and the other end is fixed to the second board.   The first and second boards are laminated boards in which a core material is interposed between the front and back surface skin materials and the skin material, and an integral hinge portion is formed on one of the front and back surfaces on the other surface. The hinge part structure according to claim 1, wherein the housing recess is formed by pressing from a skin material side.

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