JPH0611169Y2 - Sealing structure for the open end face of a synthetic resin ribbed hollow plate - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a sealing structure of an open end face of a hollow plate with ribs made of synthetic resin, and in particular, as a shelf plate, a top plate, etc. in furniture, kitchen and other housing equipment. The present invention provides a seal structure for an open end face of a hollow plate with ribs made of synthetic resin, which is suitable for use.

[Conventional technology]

Conventionally, plate-like members used for furniture, kitchen and other housing equipment,
For example, shelves, top plates, etc. have generally been made of wood or metal, but in recent years, synthetic resin plates have also been adopted because of their appearance, light weight, cleanliness, and ease of maintenance. In particular, a synthetic resin hollow plate is lightweight, and mechanical strength such as bending resistance is improved due to the presence of the internal ribs, which is advantageous in terms of cost and highly practical. The synthetic resin hollow plate is formed as a hollow plate having ribs extended in the length direction by, for example, a profile extrusion molding method, cut into a desired length according to the application, and the cut opening end face is sealed. And then put to practical use. The seal on the open end face is necessary to prevent foreign matter from entering the inner space of the hollow plate, to adjust the appearance, and to protect the end face.

By the way, as a sealing means for the opening end face, the sixth conventional method is used.
As shown in Fig. (A), a box-shaped cap 3 (in the figure, the box-shaped cap is partially broken) is externally attached to the open end surface of the hollow plate 1 and fixed with an adhesive or the like. As shown in (B), a mode in which a groove type cap 3'having a U-shaped vertical cross section is externally fixed is adopted.

[Problems to be solved by the device]

However, since all of these conventional sealing means are modes in which the cap is externally inserted to the open end face of the hollow plate, a step 4 corresponding to the thickness of the plate forming the cap is generated in the vicinity of the end face of the hollow plate, and There is a disadvantage that the step 4 must be taken into consideration when it is attached as a plate, a top plate, or the like, and it is not preferable in terms of appearance.

As a means for eliminating these disadvantages, a mode in which a plate-like body having the same size as the opening end face is joined and fixed to the opening end face with an adhesive or the like to seal the opening end face is considered. The open end face of is made up of only a relatively thin sheet flat plate and each end of the rib, and the locking area is extremely small for bonding, welding, or mechanical bonding, which is necessary for practical use. There is a problem that it is difficult to obtain strength.

The present invention provides a means for sealing the open end face of a hollow plate while ensuring practically sufficient mechanical strength without causing the above-mentioned conventional drawbacks such as the step near the end face.

[Means for Solving the Problems]

As a result of various studies for solving the above problems, the present inventor
It has been found that this can be achieved by adopting a structure in which the opening end face of the hollow plate is sealed by ultrasonic welding using a synthetic resin sealing plate on which a patterned piece under specific conditions is erected.

That is, the present invention relates to a hollow plate with ribs made of synthetic resin, which is configured by extending ribs connecting the flat plates between the flat plates which are arranged in parallel with each other with a constant interval. The opening end face of the hollow plate that crosses the extending direction is attached to the surface of the handle piece by inserting the handle piece into the space between the ribs of the hollow plate by the synthetic resin seal plate on which the handle piece is erected. With a rib made of synthetic resin, characterized in that the projection and the inner surface of the sheet-shaped flat plate of the hollow plate are ultrasonically welded to each other to fix the synthetic resin sealing plate, and the hollow plate opening end face is sealed. It is a sealing structure of the open end surface of the hollow plate.

Further, in the present invention, in addition to the handle piece, the opening end surface of the hollow plate is sealed by using a synthetic resin sealing plate in which a reinforcing tongue that is in contact with the inner surface of the sheet-like flat plate of the hollow plate and is not ultrasonically welded is erected. Also provided is a seal structure for the open end surface of the hollow plate with ribs made of synthetic resin according to the above-mentioned aspect.

[Action]

The seal structure of the present invention generally uses a synthetic resin seal plate in which a handle-like piece having a protrusion on its surface is erected.
With the ultrasonic welding machine from the outer surface of the sheet-shaped flat plate in a state in which the pattern-shaped piece is inserted into the space between the ribs of the hollow plate and the protrusion attached to the surface of the pattern-shaped piece is in contact with the inner surface of the sheet-shaped flat plate of the hollow plate. Obtained by applying ultrasonic energy. That is,
The ultrasonic energy emitted from the horn of the ultrasonic welder is first concentrated on the tip portion of the protrusion attached to the handle of the sealing plate, and at the same time, the inner surface of the sheet-shaped flat plate of the hollow plate that contacts the tip portion of the protrusion. Wave friction is generated between the projection and the sheet-shaped flat plate contact portion due to the frictional heat, and as a result, both are firmly welded. In general, the thickness of the handle is designed so that the upper surface of the handle is in contact with the inner surface of the upper sheet-like flat plate and the lower surface thereof is in contact with the inner surface of the lower sheet-like flat plate through the protrusions. It is welded around the contact part. The tip or the whole of the protrusion is melted by this welding, the upper and lower surfaces of the handle piece are welded to the inner surface of the sheet-like flat plate, and the force for separating the hollow plate and the seal plate becomes a stress acting in parallel to the weld surface. In addition, both are difficult to separate, and the mechanical strength sufficient for practical use can be secured to seal the open end face of the hollow plate.

Furthermore, the handle-like piece erected on the seal plate in the present invention also has a function of reinforcing the mechanical strength of the seal-like flat plate near the opening end face of the hollow plate in addition to the joint locking of the hollow plate and the seal plate. Have. That is, in the vicinity of the open end face of the hollow plate, the sheet-shaped flat plate between the ribs is flexible and easily damaged,
The handle-like piece that is erected on the seal plate and welded to the inner surface of the sheet-shaped flat plate functions to support and reinforce the sheet-shaped flat plate from the inner surface and prevent the bending and damage.

Further, in addition to the handle-shaped piece having a projection attached to the inner surface of the sheet-shaped flat plate of the hollow plate and ultrasonically welded, a reinforcing tongue that is in contact with the inner surface of the sheet-shaped flat plate and is not ultrasonically welded is erected. In a mode in which the opening end face of the hollow plate is sealed using the resin sealing plate, the reinforcing tongue has a function of exclusively reinforcing the mechanical strength of the sheet-shaped flat plate in the vicinity of the opening end face of the hollow plate.

〔Example〕

Hereinafter, typical preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a hollow plate obtained by carrying out the present invention and having a sealed open end surface. In the product of the present invention, there is no step near the end face of the hollow plate, which is conventionally seen, as shown in FIG.

In the present invention, as shown in the perspective view of the typical embodiment of the hollow plate 1 of the present invention, the two flat plates 1a are connected between two flat plates 1a which are arranged in parallel with each other at a constant interval. Rib 1
It is a hollow plate with ribs made of synthetic resin, which is formed by extending b, and is generally molded by a profile extrusion molding method or the like.

The most significant feature of the present invention is that, in such a hollow plate with ribs made of synthetic resin, a sealing plate made of synthetic resin in which an opening end face of the hollow plate which crosses the extending direction of the ribs at a right angle or diagonally is provided with a patterned piece. With this, the pattern piece is ultrasonically welded in a state where the projection attached to the surface of the pattern piece fitted in the space between the ribs of the hollow plate and the inner surface of the sheet-shaped flat plate of the hollow plate are ultrasonically welded to each other. That is, the opening end face of is sealed.

FIG. 3 shows a typical embodiment of the synthetic resin sealing plate 2 used in the present invention. FIG. 1A is a front view in which the surface on which the handle 2a is erected is front, and FIG. 1B is a bottom view. In both figures, the intermediate part is partially omitted.

In the figure, the handle-like piece 2a provided with the protrusion 2a-1
At the same time, a reinforcing tongue piece 2b is provided upright. The handle 2a and the reinforcing tongue 2b are fitted into the space between the ribs of the hollow plate and brought into contact with the inner surface of the sheet flat plate, and the handle is further welded. The sheet-like flat plate is erected at a suitable position in consideration of the inner surface distance and the rib distance.

Further, the number of the handle-shaped pieces 2a is appropriately determined according to a desired fixing strength when the seal plate is bonded and fixed to the open end surface of the hollow plate. The fixing strength is the protrusion 2a attached to the handle 2a.
Although it is also affected by the aspect of -1, it generally becomes larger as the number of handle pieces increases. On the other hand, however, providing an excessively large number of pattern pieces not only wastes energy in the ultrasonic welding process but also complicates the work, which is disadvantageous in terms of molding the seal plate and the amount of resin used. On the other hand, as described above, the handle piece also has a function of reinforcing the mechanical strength of the sheet-like flat plate near the opening end face of the hollow plate as a secondary function. Therefore, the number of handle pieces is appropriately determined in consideration of these factors.

As described above, the surface of the handle piece is provided with the projection 2a-1 on the surface that comes into contact with the sheet-like flat plate, and the projection and the inner surface of the sheet-like flat plate are ultrasonically welded in a contact state. .
During the ultrasonic welding, the ultrasonic energy is concentrated on the tip portion of the projection, and at the same time, wave friction is generated between the tip portion and the inner surface portion of the sheet-shaped flat plate that is in contact with the tip portion. The shape, size, attachment mode, etc. of the protrusions are not limited as long as the sheet-shaped flat plate abutting portion is efficiently melted and integrated and both are welded.

FIG. 3 shows a mode in which projections are provided on the surface of the handle piece as a plurality of filaments extending in the fitting direction in order to facilitate the fitting of the handle piece into the hollow plate. Not limited to the aspect, for example, the projections may be scattered in a dot shape. Also,
In general, the tip end portion of the projection that comes into contact with the inner surface of the sheet-shaped flat plate is preferably formed in a kind of wedge shape in terms of the efficiency of ultrasonic energy concentration.

FIG. 4 is a front view of the handle piece 2a corresponding to the circular broken line portion in FIG. As shown in the same figure (A), the handle piece may be a solid columnar shape, but as shown in the same figure (B), it is a hollow columnar shape in order to reduce the amount of resin used and reduce the weight. Good. Further, as shown in FIG. 3C, a so-called one-piece handle-like piece may be formed by connecting two plate-like pieces with a common rib arranged in the center and connected to each other.

Further, FIG. 5 is a drawing corresponding to the XY end view in FIG. 4 of the seal plate 2 on which the handle-like piece shown in FIG. 4 is erected, and FIGS. 5 (A) and 5 (B). , (C) respectively correspond to FIGS. 4 (A), (B), (C). In the embodiment shown in FIG. 5, the upper and lower ends of the tip end of the handle piece are sloped so that the handle piece 2a provided with the protrusion 2a-1 can be easily inserted into the space between the ribs of the hollow plate. It is cut into a shape and is preferably used.

Further, the reinforcing tongue piece 2b is generally made up of only the handle-like piece if the reinforcement of the mechanical strength of the sheet-like flat plate in the vicinity of the open end face of the hollow plate having the handle-like piece as a secondary function is not sufficient. It is provided auxiliary for the purpose of reinforcing the mechanical strength. That is, there is a considerable length in the interval between the adjacent pattern pieces that are erected on the seal plate, and the mechanical strength in the vicinity of the open end of the sheet-shaped flat plate between the adjacent pattern pieces is sufficient. If not, an appropriate number of reinforcing tongue pieces are provided between adjacent handle pieces to reinforce the mechanical strength. Therefore, for example, when the thickness of the sheet-shaped flat plate is large or when the interval between the handle-shaped pieces is short and it is not necessary to reinforce the mechanical strength of the sheet-shaped flat plate in the vicinity of the open end of the hollow plate, the reinforcing tongue piece is It is unnecessary.

Generally, the reinforcing tongue has a function of sufficiently reinforcing even if it is shorter than the handle, and as shown in FIG. 3, it is normally arranged in two rows vertically so as to contact the inner surfaces of the upper and lower sheet flat plates. It is arranged and installed upright on the seal plate. Further, regarding the configuration of the tip end portion of the reinforcing tongue and the upper and lower reinforcing tongues, the matters described with reference to FIG.

The size of the seal plate on which the handle and the reinforcing tongue are erected is such that the hollow plate of the present invention is completely sealed at the opening end face and a step is formed near the sealed opening end face. In order to prevent this, a member having substantially the same size as the open end face of the hollow plate is usually used.

Further, in the present invention, since ultrasonic waves are used as the joining and fixing means, the material of the hollow plate and the sealing plate needs to be synthetic resin, but the kind thereof is not particularly limited, and various thermoplastic synthetic resins can be used. Is appropriately adopted. Particularly preferred are hard synthetic resins having good ultrasonic energy transmission characteristics, such as hard polyvinyl chloride, polypropylene, high-density polyethylene, polystyrene, ABS are preferably used, and other polycarbonate, polyacrylonitrile, polyether, polyacetal, etc. The synthetic resin described above or a composite of these with various fillers is appropriately adopted.

[Effect of device]

As described above, the present invention has a structure in which the open end face of a synthetic resin ribbed hollow plate is sealed by ultrasonic welding using a sealing plate having a handle with specific conditions, and is sealed. An undesired step is not formed in the vicinity of the end face of the hollow plate, and the mechanical strength of the seal portion is practically sufficient, and a product excellent in appearance is obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a hollow plate having an open end face sealed according to the present invention, FIG. 2 is a perspective view of a hollow plate used in the present invention, and FIG. 3 is a sealing plate. , (A) is a front view, (B) is a bottom view, FIG. 4 is a front view of a handle piece corresponding to the circular broken line portion in FIG. 3, and FIG. 5 is shown in FIG. X in FIG. 4 of the seal plate on which the handle is erected
6 to FIG. 6 are perspective views of a conventional product. 1 is a hollow plate, 1a is a sheet flat plate, 1b is a rib, 2 is a seal plate, 2a is a handle, 2a-1 is a protrusion, 2b is a reinforcing tongue, 3, 3'is a cap and 4 is a step. is there.

Claims (2)

[Scope of utility model registration request] 1. A hollow plate with ribs made of a synthetic resin, wherein a rib for connecting both flat plates is extended between sheet-like flat plates arranged in parallel at a fixed interval. The opening end face of the hollow plate that traverses the installation direction was attached to the surface of the handle piece by inserting the handle piece into the space between the ribs of the hollow plate by the synthetic resin seal plate on which the handle piece was erected. A hollow with a rib made of synthetic resin, characterized in that the projection and the inner surface of the flat plate of the hollow plate are ultrasonically welded in contact with each other to fix the synthetic resin sealing plate, and the opening end face of the hollow plate is sealed. Sealing structure for the open end of the plate. 2. The synthetic resin seal plate is a seal plate in which, in addition to the handle piece, a reinforcing tongue piece that is in contact with the inner surface of the sheet-like flat plate of the hollow plate and is not ultrasonically welded is erected. Sealing structure for the open end face of a hollow plate with ribs made of synthetic resin.