JPS5837791Y2 - slip sheet - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a slip sheet in which a cloth-like material is provided on a corrugated sheet of synthetic resin.

The wooden, metal, and synthetic resin pallets traditionally used for transportation have drawbacks such as being expensive, difficult to collect, and occupying a large amount of space. Attention has been paid.

As the slip sheet, a hard paper board, a plastic sheet, a fiberboard, and even a special sheet, such as an iron plate, are used.

Slipsheets are lined with lines to meet the needs of cargo handling operations, and can be folded at the lines.
All of the above-mentioned slip sheets except the iron plate have a drawback that the tensile strength is weak at the ruled line portion, and the slip sheet is easily cut from the ruled line portion during operation.

If slip sheets such as rigid paperboards, plastic sheets, and fiberboards are made thicker to increase their tensile strength, they lose their original advantages such as low cost and light weight.

Therefore, in order to reinforce the ruled lines or increase the tensile strength of the slip sheet as a whole, methods such as pasting gummed tape on the ruled lines or inserting metal plates or wire mesh between cardboard sheets have been used.

However, the tensile strength of slip sheets to which gummed tape is attached is still not sufficient, and slip sheets with metal plates or wire meshes have the drawbacks that the metal rusts and the manufacturing process is complicated.

In addition, although iron plate slip sheets have sufficient tensile strength, they have the major drawbacks of being heavy and susceptible to rust.

The inventors of the present invention conducted extensive research to eliminate these drawbacks of conventional slipsheets, and as a result, they discovered that the purpose could be achieved by making the slipsheets have a special laminated structure. Completed the idea.

That is, the gist of the present invention is a slip sheet in which a cloth-like material 3 is provided on at least one side of a corrugated sheet 1 made of synthetic resin with a synthetic resin layer 2 interposed therebetween, and the slip sheet has at least one ruled line. 5 is provided, and the cloth-like material 3 is provided with the ruled line portion 5.
The slip sheet is characterized in that it is provided astride the.

An example of the slip sheet of the present invention will be described in more detail below with reference to the drawings, but the present invention is not limited to the following description unless it exceeds the gist thereof.

Figure 1 is a perspective view of an example of the slip sheet of the present invention;
The figure is an enlarged longitudinal cross-sectional view of the slip sheet shown in FIG. 1, and FIGS. 3 and 4 are enlarged longitudinal cross-sectional views showing other examples of the slip sheet of the present invention.

In the figure, 1 is a corrugated plate, 2 and 2' are synthetic resin layers, 3 is a cloth-like material, 4 is a gripping piece, 5 is a ruled line part, and 6 is a loading surface.

The synthetic resins constituting the corrugated sheet 1 of the slip sheet of the present invention include olefin resins such as polyethylene, polypropylene, ethylene-propylene copolymer, polybutene-1, ethylene-vinyl acetate copolymer, polyvinyl chloride,
Polyvinyl chloride resin, vinyl chloride resin such as vinyl chloride-vinyl acetate copolymer, styrene resin such as polystyrene, acrylonitrile-styrene copolymer, acrylonitrile-butadiene-styrene terpolymer, nylon 6, nylon 6-6, nylon 6-10, nylon 1
1. Common thermoplastic synthetic resins such as amide resins such as nylon 12 can be used alone or in a suitable mixture.

In particular, in the present invention, olefin resins, especially polyethylene, are preferably used.

Of course, these thermoplastic synthetic resins contain additives such as antioxidants, ultraviolet absorbers, heat stabilizers, antistatic agents, flame retardants, crosslinking agents, blowing agents, dyes, pigments, organic fillers, and inorganic fillers. may be added and mixed as appropriate.

The corrugated sheet 1 is made of the above-mentioned thermoplastic synthetic resin, and its manufacturing method is not particularly limited, but for example, the thermoplastic synthetic resin may be extruded into a sheet shape, and while the sheet is still in a molten state, irregularities are formed. A method is used in which the material is sandwiched between a pair of corrugated rolls (corrugated rolls) and formed into a corrugated shape.

In this corrugated sheet 1, the thickness of the synthetic resin sheet itself constituting the corrugated sheet 1 is 0.05 to 0.5 mm, and the wave pitch is 3.
0~50 pieces/30cm, wave height (corrugated sheet thickness) is 3~
A diameter of about 6 mm is preferably used.

A cloth-like material 3 is attached to at least one side of the corrugated sheet 1 via a synthetic resin layer 2. This cloth-like material 3 is made by, for example, cutting a synthetic resin film in the longitudinal direction and stretching it under heating. slit yarn obtained by stretching a synthetic resin film and then tearing it into thin pieces in the stretching direction, fiber obtained by spinning thermoplastic synthetic resin, monofilament, multifilament, etc. It is something that was given.

These slit yarns, split yarns, fibers, monofilaments, multifilaments, etc. (hereinafter referred to as slit yarns, etc.) all have a weight of 100 to 10,000.
Denier (d) is preferably 200 to 2000 d,
This slit yarn, etc. has a vertical thread count of 3 to 16/2.
．． 54cm, preferably 7 to 13 pieces/2.54cm, number of horizontal strokes 4 to 16 pieces/2.54cm, preferably 7 to 1
Weaving of the reed yarn, which is preferably about 3 yarns/2.54 cm, is carried out using a commonly used knitting and weaving machine, and the fabric 3 is made into plain weave, twill weave, etc.

As the synthetic resin constituting the cloth-like material 3, the same synthetic resin as the synthetic resin constituting the corrugated sheet 1 is used.

A method for providing the cloth-like material 3 on the corrugated sheet 1 with the synthetic resin layer 2 interposed is to provide the synthetic resin layer 2 on the corrugated sheet 1 in advance as a heat-sealable film layer or as an adhesive layer. A cloth-like material 3 is crimped onto the synthetic resin layer 2 under appropriate heating, or when the corrugated sheet 1 is manufactured, the synthetic resin that will become the synthetic resin layer 2 is extruded into a sheet shape, and this is still molten. While in this state, the corrugated sheet 1 is fed, and at that time, the cloth-like material 3 manufactured in advance is simultaneously fed and pressed with a roller to integrate the corrugated sheet 1, the synthetic resin layer 2, and the cloth-like material 3. For example, a method of

As the synthetic resin constituting the synthetic resin layer 2, the corrugated plate 1
When using the synthetic resin film in the form of a heat-sealable synthetic resin film, the same kind of synthetic resin as the corrugated sheet 1 is preferably used.

Further, when an adhesive layer is used as the synthetic resin layer 2, it is necessary to use an appropriate adhesive in consideration of the properties of both the corrugated sheet 1 and the cloth-like material 3.

When the cloth-like material 3 is attached to a corrugated plate by the method described above, it is preferable that a film is further laminated on the surface of the cloth-like material 3 in order to prevent thermal deterioration of the cloth-like material 3.

It is practical to manufacture the corrugated sheet 1, the synthetic resin layer 2 and the laminate film all from polyethylene.

Alternatively, the cloth-like material 3 may be joined to the synthetic resin layer 2 using an adhesive.

Various configurations of the slip sheet of the present invention can be considered. For example, a cloth-like material 3 is provided on a corrugated sheet 1 via a synthetic resin layer 2, and a synthetic resin layer 2' is pasted on the opposite surface. (Figure 2), cloth-like v/J3 is synthetic resin layer 2
and 2' on the front and back sides of the corrugated sheet 1 (FIG. 3), or a cloth-like material 3 is provided on one side of the corrugated sheet 1 with a synthetic resin layer 2 in between, and the corrugated sheet 1 directly constitutes the back (or front) of the slip sheet (fourth
However, the slip sheet of the present invention is not limited to these, and various other embodiments may be applied.

Since the central part of the loading surface 6 of the slip sheet does not significantly affect the tensile strength, the cloth-like material 3 may not be provided on the entire surface of the corrugated sheet 1, but may be provided only on a part of the corrugated sheet 1.

However, when the cloth-like material 3 is pasted to a part, it is preferable that the cloth-like material 3 is pasted at least astride the ruled line part and 10 cm on both sides thereof.

If the cloth-like material 3 is provided only on a part of the corrugated sheet 1, slip sheets of various widths can be manufactured by keeping the width of the cloth-like e13 constant and varying the width of the corrugated sheet 1. It has the advantage of being able to

Among the slip sheets of the present invention, those having the cloth-like material 3 on only one side may have either side facing up, but preferably the side to which the cloth-like material 3 is attached is the top side. use.

It is desirable to provide a ruled line part 5 on at least one end of the slip sheet to form at least one gripping piece 4, and if the gripping piece 4 maintains a certain angle with the loading surface 6, it can be used easily. It is very convenient.

If the gripping pieces 4 are formed at both ends of the slip sheet as shown in FIG. Since the cushioning properties of the corrugated sheet 1 are further increased, it also has the effect of softening the impact when loading and unloading cargo.

Also, because the air is sealed, the insulation is even better, and water and dust do not enter, making it suitable for transporting frozen foods.

Further, according to the configuration of the present invention, the rigidity of the corrugated plate 1 makes it easy to insert the fork of a push-pull forklift under the gripping piece 4, and the pallet gripping tool can easily grip the gripping piece 4, allowing the work to be carried out smoothly.

Further, since the cloth-like material 3 is provided, cutting at the ruled line portion 5 is less likely to occur.

Furthermore, since no metal materials are used, there is no need for rust, and the product is highly water resistant.

Furthermore, by appropriately changing the properties of the cloth-like material 3, the tensile strength of the slip sheet 1 to the entire slip sheet can be increased or decreased, thereby producing various effects such as obtaining a slip sheet suitable for various uses.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an example of the slip sea I of the present invention, Fig. 2 is an enlarged longitudinal section of the slip sea I shown in Fig. 1, and Figs. It is an enlarged view of a longitudinal section showing another example of the slip sheet of the invention. In the figure, 1 is a corrugated plate, 2 and 2' are synthetic resin layers, 3 is a plain-woven cloth, 4 is a gripping piece, 5 is a ruled line part, and 6 is a loading surface.

Claims (2)

[Scope of utility model registration request] (1) Synthetic resin layer 2 on at least one side of the synthetic resin corrugated plate 1
A slip sheet in which a cloth-like material 3 is provided through a slip sheet, the slip sheet is provided with at least one ruled line section 5, and the cloth-like material 3 is provided astride the ruled line section 5. A slip sheet characterized by: (2) The slip sheet according to claim 1, wherein the cloth-like material 3 is knitted and woven from slit yarns of synthetic resin.