JPH0319601Y2 - - Google Patents

Description

[Detailed description of the invention] (Technical field) The present invention relates to continuous bending joints, and in particular, the invention relates to continuous bending joints, particularly for connecting synthetic resin or metal plates, synthetic resin cardboard plates, plywood, hardboards, etc. This invention relates to a joint that can be bent and connected over its entire length.

(Prior Art) Conventionally, various structural parts, interior parts, and other parts have been constructed by bendably connecting synthetic resin plates and the like. Typical examples include garage and window doors and blinds, screens and bath covers, accordion doors, blinds for street-facing windows and cases, and shutter ivy. In these cases, the plates as the constituent members are connected in a bendable manner by hinges, or
Alternatively, it is common that the plate itself is provided with a thin, flexible portion along the portion to be bent, thereby making the plate material bendable.

However, when connecting boards with hinges, the hinge only partially connects the ends of the boards at certain points, which creates gaps between the boards, which prevents rainwater from leaking. In addition to causing problems such as dust, dirt, etc. passing through parts such as the above-mentioned doors constructed by connecting these plate materials, there are inconveniences such as the hinges being exposed to the outside and spoiling the beauty of the parts. occurs.

On the other hand, in the latter case, that is, when a thin wall part is formed in the plate material itself and the thin wall part makes the plate material bendable, when the thin wall part is repeatedly bent, the thin wall part In such a case, even if other plate parts and thin wall parts are not damaged in any way,
The entire part made up of these plates becomes unusable.

Therefore, in order to deal with the above-mentioned problem, the applicant of this application first filed Utility Application No. 58-160021 (U.S.
No. 1), we revealed a new continuous bending joint. It is a longitudinal synthetic resin bending joint obtained by integral molding, with attachment parts formed at both ends in the width direction, and these attachment parts are made of connecting members with excellent bending resistance. Due to the connected structure, there are no gaps between the parts to be connected, and it has an aesthetic appearance and sufficient durability, and even if some of the parts are damaged, it will not be damaged. It is only possible to replace parts.

(Problem to be Solved) However, in the above-mentioned bending joint, when the bending angle is to be restricted, one of the mounting parts must have a shape that protrudes from the surface opposite to the member clamping part. However, if a relatively large load is applied to the member to which it is attached, there is a risk that the stopper may be destroyed, and the structure may be damaged. However, since the stopper portion cannot be provided at an arbitrary position and at an arbitrary angle, there is a problem that it is impossible to arbitrarily set the bending angle.

In addition, when it is necessary to set a large bending angle in such a bending joint, for example, when it is used for a hinge part of a box lid, etc., due to its structure, the distance between both mounting members, in other words, In this case, it becomes inevitable to increase the width of the connecting member. Therefore, in such a bending joint, since the width of the connecting member made of a flexible material such as canvas is increased, the connecting member itself may be twisted or expanded. There were also inherent problems that made the usability worse.

(Solution Means) The present invention was made to solve the above-mentioned problems, and its gist is to create a longitudinal synthetic resin bending joint obtained by integral molding. Both ends in the width direction are used as attachment parts that are attached to the ends of a predetermined plate material, and these attachment parts are connected at least by a sheet-like connecting member with excellent bending resistance that extends in the longitudinal direction. In the continuous bending joint, a predetermined block is integrally provided on at least one side of the sheet-like connecting member at the center in the width direction of the portion located between the attachment portions, and the block is The reason is that the bending angle is regulated.

(Function) That is, according to the present invention, the attachment portions formed at both ends in the width direction are connected by a connecting member having excellent bending resistance, which was previously proposed by the applicant. In the continuous bending joint, a block shaped to regulate the bending angle is integrally provided on the connecting member.

In other words, by providing a block as a bending angle regulating member between the attachment parts of the plate materials, the shape of the block can be changed without applying any processing to the attachment part or the connection member of the bending joint. A bending joint having an arbitrary bending angle can be obtained by simply using this method. When regulating the bending angle of the joint with such a block, the mounting parts are brought into contact from both sides with the abutment surfaces of the blocks that face the mounting parts located on both sides of the block. Therefore, the stress generated in the block is only compressive stress, and no shear stress is generated, so that the block will not be destroyed. Furthermore,
In the bending joint according to the present invention, by fixing a rigid block to the widthwise center of the flexible connecting member, two bent parts are provided on both sides of the block. It is possible to configure one bending part with a narrow width, suppressing twisting and expansion/contraction occurring in the connecting member, and extremely effectively preventing deterioration in the usability of such a bending joint. ,
The bending angle is divided into two by the two bending parts,
Since the stress burden applied to each bent portion is reduced, damage to the bent portions can be effectively prevented, and the durability of the bent joint can be effectively improved.

Furthermore, by providing the blocks on both sides of the connecting member, it is extremely easy to control the bending angle on both sides, and further, by making the cross-sectional shape of the block rectangular with a predetermined width. Even when the members attached to such a bending joint are bent until they become parallel to each other, they are still bent with the block sandwiched between them at the bending part.
A gap of a predetermined width is formed between the two members, and therefore, it is possible to effectively avoid the occurrence of objects getting caught when folded or the two members coming together.

(Example) Hereinafter, in order to clarify the present invention more specifically, one example thereof will be described in detail based on the drawings.

FIG. 1 shows an example of a continuous bending joint according to the present invention, which connects plates 12, 12 in a bendable manner. The joint 14 shown therein is a longitudinal one formed by extrusion molding, and has a pair of elongated U-shaped cross-section attachment portions that extend continuously along the connecting end of each plate material 12, 12. 16,16
, a canvas 20 as a connecting member that connects the attachment parts 16, 16 continuously in the longitudinal direction, and a canvas 20 that is located approximately at the center in the width direction on the surface of the canvas 20 and is continuous in the longitudinal direction. A block 24 as a longitudinal bending angle regulating member extending in
26. This joint 14
is a pair of mounting parts 16, 16 and block 2
4, 26, the canvas 20 is continuously fed in the extrusion direction so that both sides of the canvas 20 in the width direction are embedded in the attachment parts 16, 16, and the blocks 24, 26
are integrally molded by being fixed so that they are located on opposite sides of each other.

The pair of attachment parts 16, 16 are made of a rigid resin material such as polyvinyl chloride, polypropylene, AS resin, polycarbonate, etc., and the pair of opposing clamping parts 28,
30 and a connecting part 32 that connects these clamping parts 28 and 30, the cross section forms a U-shape, and the end of the plate material 12 is fitted and fixed inside thereof.

Note that one of the clamping parts 30 of the mounting part 16
has a longer length in the joint width direction than the other holding part 28. That is, the tip in the width direction is made to protrude beyond the other holding part 28, and the inner side of the protruding end serves as a guide surface 34 so that the plate material 12 can be easily fitted into the attachment part 16. It's summery.

Further, when the plate material 12 is not inserted, the other clamping part 28 is inclined so that as it moves away from the connecting part 32, it approaches the opposing clamping part 30, and the widthwise tip of the other clamping part 28 The gap between the inner side and the facing portion of one of the clamping parts 30 is made narrower than the thickness of the plate material 12, so that the plate material 12 fitted into the mounting part 16 is held by the pair of clamping parts 28 and 30. It is designed so that it can be held elastically.

And between the pair of attachment parts 16, 16,
A canvas 20 of a predetermined width made of woven fibers such as vinylon (registered trademark) is provided.
The pair of attachment parts 16, 16 are connected by. Like the attachment parts 16, the canvas 20 has a longitudinal shape that extends continuously along the connecting end of the plate material 12, and both sides of the canvas 20 in the width direction are inserted into the holding parts 30 of each attachment part 16. It is embedded, fixed, and held.

Further, on the surface of the canvas 20, a pair of attachment parts 1 are provided.
Blocks 24 and 26 made of the same material as the mounting portion 16 are fixedly located in the center between the mounting portions 6 and 1 on opposite sides. A block 24 having a trapezoidal cross-section whose width becomes narrower as it moves away from the canvas 20 is fixed to the surface of the canvas 20 on the side of the clamping part 30, while a block 24 having a trapezoidal cross section is fixed to the surface on the opposite side. A block 26 having a rectangular cross-section whose width is slightly smaller than the fixing width of the block 24 is fixed. And canvas 2
0, the exposed portions on both sides of the block 24, in other words between the block 24 and the mounting member 16, are bendable.

As shown in FIG. 2, when the continuous bending joint 14 is bent toward the block 24, the contact surface 36 of the block 24 facing the mounting portions 16, 16, 36 are brought into contact with the outer surface of the connecting portion 32 of the attachment portion 16, thereby regulating the bending angle thereof. That is, continuous bending joint 1
4 is bent to a position where the plates 12, 12 form approximately 90 degrees, so that the respective contact surfaces 36, 36 are brought into contact with the outer surface of the connecting portion 32,
The cross-sectional shape of the block 24 has been determined.

Further, FIG. 3 shows a state in which the continuous bending joint 14 is bent toward the block 26. That is, when the block 26 has a rectangular cross section and is bent to a position where the plates 12, 12 are parallel to each other, the abutment surface 38 of the block 26 facing the mounting portions 16, 16 , 38 are brought into contact with the outer surface of the holding portion 28, thereby regulating the bending angle thereof. That is, in this state, the mounting parts 16, 16 are positioned parallel to each other with a distance corresponding to the width of the block 26, and therefore, the mounting parts 16, 16 are fitted into the mounting parts 16, 16. When the plate materials 12, 12 are bent until they become parallel to each other,
A corresponding gap will also be formed between both plate materials.

Thus, such exemplary continuous fold joint 14
The structure is such that the inserted plates are bent approximately 270 degrees to each other, but in reality, there are two bent parts (the exposed part of the canvas 20) formed on both sides of the block 24. Since each part) is bent approximately 135 degrees at a time, the stress burden on each bent part is advantageously reduced, which increases the durability of the bent part and, by extension, the life of the continuous bending joint. has been effectively enhanced. In addition, the bending part is the block 24.
Since they are distributed on both sides, it is possible to narrow the width of the exposed portion of each canvas 20, and therefore, it is possible to effectively suppress twisting and expansion/contraction in the canvas 20, thereby improving the feeling of use. It is said that the structure can be improved.

The continuous bending joint 14 described above can be effectively used, for example, as a hinge portion of a lid of a box. That is, one mounting portion 16
With the block 24 located inside, the upper edge of the wall material constituting the box body is fitted, and the edge of the plate serving as the lid of the box is fitted into the other mounting portion 16.

In a box configured in this way, when the lid is closed, the bending angle is restricted to approximately 90 degrees by the block 24, which eases the interference between the lid and the box body. That will happen. Furthermore, when the lid is open, a gap is formed between the lid body and the box wall plate by the block 26, so that the handle etc. attached to the lid body are prevented from being hit against the wall plate. Therefore, the damage can be effectively prevented, and even when attempting to close the lid, it can be easily done by inserting a finger into the gap.

Although the embodiments of the present invention have been described in detail above, the present invention can be implemented in various other ways.

For example, in the above embodiment, blocks 24, 2
6 had a longitudinal shape extending continuously on the surface of the canvas 20, but as shown in FIG. 4, a plurality of blocks 40, It may be 42. In addition,
In the figure, the other members are completely the same as those in the embodiment described above, so the same reference numerals are given to the corresponding members, and detailed explanation thereof will be omitted.

Further, the cross-sectional shape of the block is not limited to the one shown in the example, and various shapes that can be regulated to any bending angle can be appropriately selected. 20
By providing it only on one side, it is also possible to restrict the bending angle on only one side. Further, the blocks 24 and 26 only need to be fixed on the surface of the canvas 20, and first the mounting member 1
6, 16 and the canvas 20 may be integrally formed and then fixed with an adhesive or the like.

Regarding the materials of the attachment part, the connecting member, and the block, in addition to those shown in the above embodiments, for example, as the connecting member, other woven or knitted fabrics, or mesh members such as wire mesh or plastic mesh, or materials with excellent bending strength may be used. It is possible to use resin sheet materials, etc.
Similarly, the material of the attachment part and the connecting member is by no means limited to synthetic resin.

Furthermore, in the structure for attaching the plate material 12 to the attachment part 16, grooves extending in the longitudinal direction are provided on the inner surface of the attachment part, and convex portions are provided at positions corresponding to the grooves on the surface of the plate material to be fitted. In particular, when the plate material is to be held more firmly, or when the plate material is to be glued and fixed to the mounting part, a groove is formed on the inner surface of the mounting part to guide the adhesive. Well-known techniques such as the above may be appropriately adopted, and furthermore, the shape is not limited to the U-shaped cross section as in the above embodiment.

In addition, in the above embodiment, the case where the illustrated joint is used for the hinge part of the lid of a box is shown, but the joint according to the present invention can be used not only for such a box but also for various other cases. It can be used in
Although not listed in detail, the present invention can be implemented with various changes and modifications without departing from its spirit, and the present invention does not include any such embodiments. Needless to say, it includes.

(Effects of the invention) As detailed above, the continuous bending joint according to the invention connects a pair of attachment parts attached to the ends of a plate using a sheet-like connection member with excellent bending resistance. In the conventional continuous bending joint, a block having a predetermined shape is integrally provided on at least one side of the widthwise central portion of the connecting member. According to the present invention, the plate can be cut to the desired length depending on the length of the plate material, and it has excellent durability and sealing function at the joint, as well as being aesthetically pleasing. It is easy to arbitrarily set or change the bending angle without impairing its various advantages, and there is no risk of the angle regulating member being destroyed. In addition, since such a continuous bending joint has two bent portions on both sides of the block, the width of each bent portion is narrowed, making it difficult for the connecting member to twist or expand and contract, making it extremely difficult to use. Furthermore, since the bending angle is shared between the two bent portions, the stress burden on each bent portion is reduced, and durability can be advantageously improved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a main part showing a continuous bending joint which is an embodiment of the present invention, and FIGS. 2 and 3 are cross-sections of main parts for explaining the bending state of the joint shown in FIG. It is a diagram. FIG. 4 is a perspective view of the main parts of a joint according to another embodiment of the present invention. 12... Plate material, 14... Continuous bending joint, 16
... Attachment part, 20 ... Canvas (connecting member), 24,
26, 40, 42... block, 36, 38...
Contact surface.

Claims (1)

[Scope of utility model registration request] It is a longitudinal synthetic resin bending joint obtained by integral molding, and both ends in the width direction are attached to the ends of a predetermined plate material. In a continuous bending joint that is connected by a sheet-like connecting member that extends in the longitudinal direction and has excellent bending resistance, at least one of the sheet-like connecting members has a A continuous bending joint characterized in that a predetermined block is integrally provided on a side surface, and the bending angle is regulated by the block.