JP2009280981A - Method for manufacturing for synthetic resin flooring material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method which enables the manufacture of a synthetic resin flooring material facilitating the maintenance of a device for attaching an antistatic linear material such as conductive fibers to a flooring material body, and having proper productivity and an antistatic function. <P>SOLUTION: A base plate portion of the synthetic resin flooring material body is provided with a plurality of protrusions for fusion of a linear material, which are protruded downward from an undersurface of the base plate portion; the conductive fibers are arranged astride the at least two protrusions for the fusion of the conductive fibers; the conductive fibers are pressed against the protrusions for the fusion of the linear material by bringing the flooring material body and the conductive fibers relatively closer to each other in the state of making the conductive fibers generate heat by the passage of an electric current through the conductive fibers; the protrusions for the fusion are partially melted by the heat of the conductive fibers, so that the linear material can be embedded in the protrusions for the fusion of the linear material; and after the completion of the embedment of the linear material, the passage of the electric current is stopped so that the molten portion of the protrusions for the fusion of the conductive fibers can be cooled for solidification. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for producing a synthetic resin floor material having an antistatic function.

As shown in FIG. 8, a synthetic resin having a substrate portion 120 and a plurality of leg portions 130 that extend from the lower surface of the substrate portion 120 and are arranged in a lattice form to form a gap between the substrate portion 120 and the laying surface. A synthetic resin floor material 100 including a floor material body 110 made of metal and conductive fibers 140 such as carbon fibers, which are arranged along the lower surface of the substrate portion 120 and are fused to the floor material body 110 in at least two places. It has been proposed (see Patent Document 1).
That is, since the synthetic resin flooring 100 is provided with the conductive fibers 140 along the lower surface of the substrate part 120 as described above, the soles of pedestrians walking on the synthetic resin flooring 100 are used. The static electricity charged to is discharged by the conductive fiber 140. Therefore, since a certain amount of static electricity is not accumulated in the pedestrian, the pedestrian does not feel uncomfortable due to the static electricity.

  Conventionally, as shown in FIG. 9A, the synthetic resin flooring 100 is made of conductive fibers along the lower surface of the substrate portion 120 between the rows of the leg portions 130 arranged in a lattice pattern. In a state where 140 is arranged, as shown in FIG. 9B, a part of the lower surface of the substrate part 120 is melted by pressing the heater 200 against the lower surface of the substrate part 120 at both ends of the conductive fiber 140, The both ends of the conductive fiber 140 are obtained by heat-sealing to the lower surface of the substrate part 120.

  However, in the case of the synthetic resin flooring 100, the heater 200 is pressed against the lower surface of the substrate portion 120 with the conductive fibers 140 interposed therebetween to melt a part of the lower surface of the substrate portion 120. Therefore, the melted resin adheres to the heater 200 and is prone to malfunction, and the portion of the heater 200 that is in contact with the lower surface of the conductive fiber 140 and the substrate portion 120 is likely to wear out. There is a problem.

Japanese Patent Laid-Open No. 9-242055

  In view of the above circumstances, the present invention provides a method capable of manufacturing a synthetic resin flooring material that is easy to maintain and manage a device for attaching conductive fibers to a flooring material body and has an antistatic function with high productivity. The purpose is to do.

In order to achieve the above object, a method for producing a synthetic resin floor material according to the present invention includes a plurality of legs that extend from a substrate portion and a lower surface of the substrate portion, and form a gap between the substrate portion and a laying surface. A synthetic resin floor material body having a portion, and an antistatic linear material made of a conductive material disposed along the lower surface of the substrate portion and fused to the floor material body at at least two locations; In a method for producing a synthetic resin floor material comprising:
While providing a plurality of linear material fusion projections projecting downward from the lower surface of the substrate portion to the substrate portion, the linear material is disposed so as to straddle between at least two linear material fusion projections, In a state in which the linear material is energized to heat the linear material, the floor material body and the linear material are relatively brought close to each other, and the linear material is pressed against the linear material fusion projection, thereby the linear material. The part of the linear material fusion projection is melted by the heat of the wire to bury the linear material in the linear material fusion projection, and after the completion of the embedding, the energization is stopped and the linear material fusion projection is melted. It is characterized by cooling and solidifying the part.

In the present invention, the synthetic resin forming the floor material body is not particularly limited, and examples thereof include polypropylene, polyethylene, polyvinyl chloride, and ABS resin.
The size and shape of the protrusion are not particularly limited as long as the linear material can be firmly fused.

Although it does not specifically limit as a conductive material, For example, metals, such as carbon, copper, iron, aluminum, and these composite materials are mentioned.
The shape of the linear material is not particularly limited, and examples thereof include a rod shape, a monofilament, a twisted yarn shape, etc., but a flexible material is preferable, and a carbon fiber yarn in a twisted yarn shape is preferable. Used for.

As described above, the method for producing a synthetic resin floor material according to the present invention includes a substrate portion and a plurality of legs that extend from the lower surface of the substrate portion and form a gap between the substrate portion and the laying surface. A synthetic resin floor material main body, and a synthetic antistatic linear material made of a conductive material disposed along the lower surface of the substrate portion and fused to the floor material main body in at least two places. In the method for producing a resin floor material, the substrate portion is provided with a plurality of linear material fusion projections protruding downward from the lower surface of the substrate portion, and the linear material is provided with at least two linear material fusion projections. In a state where the linear material is energized to heat the linear material, the floor material body and the linear material are relatively brought close to each other, and the linear material is fused. The linear material is melted by melting the part of the linear material fusion projection with the heat of the linear material. Because it was buried in the projecting part, the energization was stopped after the completion of the embedding, and the melted part of the linear material fusion projecting part was cooled and solidified, so the heater became unnecessary, and the problem due to adhesion of the molten resin to the heater And the problem of wear of the heater part is solved.
That is, it is easy to maintain and manage the fusion apparatus for the conductive fiber to the floor material body, and the productivity is improved.

Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof.
1 and 2 show one embodiment of a synthetic resin floor material according to the present invention, and FIGS. 3 to 5 show conductive fibers used in the method for producing a synthetic resin floor material according to the present invention. A fusing device is schematically shown.

As shown in FIGS. 1 and 2, this synthetic resin flooring A is composed of a flooring body 1 obtained by injection molding a thermoplastic resin such as polypropylene, polyethylene, polyvinyl chloride, ABS resin, wood, A surface decorative material 10 formed of an inorganic material, a synthetic resin, or the like, and two conductive fibers F as an antistatic linear material are provided.
The flooring main body 1 includes a substrate portion 11 having a substantially square shape and a number of leg portions 12 erected so as to extend downward from the lower surface of the substrate portion 11.

The substrate part 11 is provided with a plurality of female fitting parts 13a at equal pitches along two adjacent sides, and a plurality of female fitting parts 13a that can be fitted into the female fitting parts 13a along the remaining two sides. Are provided at the same number and pitch as the female fitting portions 13a.
The many leg portions 12 are provided on the lower surface 11a of the substrate portion 11 so as to be arranged in a lattice pattern at an equal pitch. In addition, on the lower surface 11a of the substrate portion 11, a total of four linear materials are melted, one in the vicinity of the end portion of the substrate portion 11 between the rows of the second and third leg portions 12 from both sides. A protrusion 14 is provided as a wearing protrusion.

And the surface decoration material 10 is being fixed to the board | substrate part 11 in the state which covered the upper surface of the board | substrate part 11 with the adhesive agent, the bis | screw, etc.
The conductive fibers F are fused to the protrusions 14 as described below using the conductive fiber fusion apparatus 2 shown in FIGS.

  That is, as shown in FIGS. 3 to 5, the conductive fiber fusion device 2 includes a positioning device 4 for the floor material body 1 that is conveyed by the belt conveyor 3 with the lower surface 11 a side of the substrate portion 11 facing upward, The conductive fiber F drawing device 5 and the conductive fiber F arranging device 6 are included.

  As shown in FIG. 4, the positioning device 4 includes a pair of stoppers 41, 41 that are rotatably provided corresponding to the front and rear ends of the flooring body 1 that is conveyed in the direction of arrow S via the belt conveyor 3. Thus, when the air cylinder (not shown) is expanded and contracted, the floor is rotated and brought into contact with the front end and the rear end of the flooring main body 1 (the state shown in FIG. 4), and the flooring by the belt conveyor 3 by retreating upward. A retraction position (not shown) that allows the conveyance of the main body 1 can be selected.

  The drawer device 5 includes a chuck device 51 disposed near one end in the width direction of the floor material body 1 positioned via the positioning device 4, and the width direction of the floor material body 1 corresponding to the chuck device 51. The movable chuck device 52 is arranged so as to face the other end of the floor and can reciprocate in the upper direction of the floor body 1 in the width direction.

  The chuck device 51 selectively drives two chucks 51a provided at the same interval as the length between the protrusions 14 in the conveying direction of the belt conveyor 3, and the chucks 51a to the gripping position and the release position. A part of the conductive fibers F wound around the two bobbins B and fed out through the guides G by driving of the actuator 51b, or the gripping can be released. It has become.

As shown in FIGS. 4 and 5, the moving chuck device 52 is slidably supported by the guide rail 52a disposed above the belt conveyor 3 in a direction orthogonal to the conveying direction, and supported by the guide rail 52a. Bracket 52b, two chucks 52c installed on the bracket 52b at positions opposed to the chucks 51a of the chuck device 51, and the chucks 52c selectively in the gripping position and the release position, respectively. An actuator 52d to be driven and a rodless cylinder (not shown) for reciprocating the bracket 52b along the guide rail 52a.
The moving chuck device 52 is driven by a rodless cylinder so that each chuck 52c moves between a forward position close to the chuck 51a of the chuck device 51 and a retracted position where the chuck body 51 retracts near the other end of the flooring body 1. It is designed to reciprocate.

  The disposing device 6 includes a first elevating cylinder 62 provided on the fixed frame 61, a second elevating cylinder 63 connected to the piston rod of the first elevating cylinder 62, and the elevating / lowering via the second elevating cylinder 63. Four chucks 65 each having two conductive fibers F spaced apart from each other on a free bracket 64, and an actuator for selectively driving each chuck 65 to a gripping position and a release position 66, a cutting device 67 provided on the bracket 64 in the vicinity of one end of the floor material body 1 in the width direction, one each for one conductive fiber F, and cold air jet as a cooling device Nozzle 68.

Each pair of chucks 65 is attached so as to face the two conductive fibers F drawn out above the flooring body 1 by the moving chuck device 52 in the drawer device 5.
Each chuck 65 is an electrode whose chuck surface is made of a conductive material such as copper, and this electrode is connected to a power supply device (not shown) via an electric wire 65a.

  The power feeding device can supply a direct current to the conductive fiber F so that the electrode of the chuck 65 holding one end of the conductive fiber F has a positive potential and the electrode of the chuck 65 holding the other end has a negative potential. ing.

  The cold air injection nozzle 68 is fixed to the bracket 64, and is moved up and down as the chuck 65 is moved up and down by being driven by the second elevating cylinder 63. Can be sprayed on.

Next, the attachment operation | movement to the flooring main body 1 of the conductive fiber F by the conductive fiber melt | fusion apparatus 2 comprised in this way is demonstrated.
In the initial state, the conductive fiber F drawn out from the bobbin B is gripped through the guide G, with a portion remaining in the chuck 51a of the chuck device 51, in the vicinity of the tip. Here, the floor material body 1 molded by a molding apparatus (not shown) is supplied to the belt conveyor 3 with the lower surface 11a side of the substrate portion 11 facing up, and is conveyed to the conductive fiber fusion apparatus 2 and chucked by the drawer apparatus 5 When the position facing the device 51 is reached, the front stopper 41 rotates to the restricting position and comes into contact with the front end of the floor main body 1, and the rear stopper 41 rotates to the restricting position, and the floor main body 1, the floor material body 1 is positioned at the conductive fiber fusion position.

Next, by driving the rodless cylinder, the bracket 52b slides along the guide rail 52a to its advance position, and each chuck 52c of the moving chuck device 52 moves to the gripping position.
The chuck 52c moved to the gripping position grips the vicinity of the tip of the conductive fiber F gripped by the chuck 51a of the chuck device 51.

Thereafter, after the gripping by the chuck 51a of the chuck device 51 is released, the rodless cylinder is driven, the bracket 52b is slid along the guide rail 52a to its retracted position, and the upper side of the belt conveyor 3 via the chuck 52c. The two conductive fibers F are drawn out respectively.
When the conductive fibers F are pulled out, the chuck 51a of the chuck device 51 grips the feeding side of the conductive fibers F again.

After that, first, the second elevating cylinder 63 is extended and each chuck 65 of the disposing device 6 in the release position lowers each of the two conductive fibers F to the holding position.
As shown in FIG. 6, each of the chucks 65 lowered to the clamping position grips the conductive fibers F, and at the same time, the cutting device 67 lowered to the position holding the feeding side of the conductive fibers F, as shown in FIG. A portion of the conductive fiber F is cut off in the vicinity of the chuck 51a of the apparatus 51.

When the cutting of the conductive fiber F is completed, after the chuck 52c of the moving chuck device 52 releases the gripping of the conductive fiber F, the power feeding device performs direct current between the chuck surfaces of the chuck 65 that sandwiches both ends of the conductive fiber F. An electric current is applied to cause the conductive fibers F to generate heat above the melting temperature of the thermoplastic resin constituting the floor material body 1.
After the heat generation of the conductive fiber F is completed, as shown by an arrow in FIG. 7 (a), the first elevating cylinder 62 is extended so that the conductive fiber F is between the leg portions 12 upright in the flooring body 1 respectively. The bracket 64 is further lowered until it passes through and presses against the surface of the protrusion 14.
Due to the pressure contact, the conductive fiber F melts the contact portion of the protrusion 14 by the heat of the conductive fiber F, and a part of the conductive fiber F enters the protrusion 14 as shown in FIG.

When the conductive fiber F enters the predetermined position of the protrusion 14, the supply of direct current is stopped, and cold air is injected from the cold air injection nozzle 68 toward the protrusion 14 to solidify the molten resin, and the protrusion 14 becomes conductive. Fix the fiber F.
When the solidification is completed, the chuck 65 releases the holding of the conductive fiber F, and the disposing device 6 moves backward.

Thereafter, the front and rear stoppers 41 are rotated to the non-restricted position, the restriction to the flooring main body 1 is released, and the flooring main body 1 is conveyed to the subsequent process by the belt conveyor 3.
The surface decorative material 10 may be fixed to the floor material body 1 either after the conductive fibers F are fused or before the fusion.

  When the synthetic resin floor material thus obtained walks on the synthetic resin floor material, the static electricity charged on the sole of the pedestrian becomes conductive fibers F attached to the lower surface 11a of the substrate portion 11. The pedestrian does not accumulate more than a certain amount of static electricity. And since the conductive fiber F is firmly fused to the flooring main body 1, it does not float due to wind and rain, and the discharge effect of charged static electricity can be maintained for a long time. In addition, as described above, the conductive fiber F is heated by being energized to the conductive fiber F itself so as to be fused to the flooring body 1, so that it is fused using a conventional heater. Therefore, there is no problem that the molten resin adheres to the heater and causes problems or wear of the heater, and the maintenance of the apparatus is easy and the flooring can be manufactured with high productivity.

The present invention is not limited to the above embodiment. For example, in the above embodiment,
The two conductive fibers are fused to the floor material body, but the number can be increased or decreased depending on the size of the floor material or the density of the conductive fibers.
In the above embodiment, one conductive fiber is fused in a state of being stretched over two protrusions. However, a protrusion is provided at an intermediate position, and the protrusion at the intermediate position is electrically conductive. A part of the conductive fiber may be fused.

In the above embodiment, cold air is sprayed from the nozzle to cool and solidify the melted portion of the protrusion, but it may be cooled and solidified by pressing the cooling plate.
In the above embodiment, the surface decorative material is fixed to the floor material main body so as to cover the upper surface of the substrate portion, but the surface decorative material may not be provided. That is, you may use a flooring main body as a flooring as it is.

It is a perspective view showing one embodiment of a synthetic resin flooring according to the present invention. It is a bottom view of the synthetic resin flooring of FIG. It is a front view of one example of the conductive fiber fusion apparatus used for the manufacturing method of the synthetic resin flooring according to the present invention. It is a principal part side view of the electroconductive fiber melt | fusion apparatus of FIG. It is a principal part top view of the conductive fiber fusion apparatus of FIG. It is a figure which illustrates typically a motion of the conductive fiber fusion device of Drawing 3, and shows a state immediately after cutting a conductive fiber with a cutting device. FIGS. 3A and 3B schematically illustrate the movement of the conductive fiber fusion apparatus in FIG. 2, in which FIG. 2A shows a state immediately before fusion and FIG. 2B shows a state immediately after fusion. Yes. It is a principal part perspective view of the conventional synthetic resin flooring. It is a figure which illustrates typically the manufacturing process of the synthetic resin flooring of FIG. 8, The figure (a) shows the state just before the fusion | melting of an electroconductive fiber, The figure (b) shows the state just after the fusion. It shows the state.

Explanation of symbols

A Synthetic resin floor material 1 Floor material body 11 Substrate part 11a Lower surface 12 of substrate part 11 Leg part 14 Protrusion (projection for fusion of linear material)
F Conductive fiber (Antistatic linear material made of conductive material)

Claims (1)

A synthetic resin floor material body having a substrate portion and a plurality of legs extending from the lower surface of the substrate portion and forming a gap between the substrate portion and the laying surface, and disposed along the lower surface of the substrate portion In a method for producing a synthetic resin floor material comprising an antistatic linear material composed of a conductive material fused to the floor material body in at least two places,
While providing a plurality of linear material fusion projections projecting downward from the lower surface of the substrate portion to the substrate portion, the linear material is disposed so as to straddle between at least two linear material fusion projections, In a state in which the linear material is energized to heat the linear material, the floor material body and the linear material are relatively brought close to each other, and the linear material is pressed against the linear material fusion projection, thereby the linear material. The part of the linear material fusion projection is melted by the heat of the wire to bury the linear material in the linear material fusion projection, and after the completion of the embedding, the energization is stopped and the linear material fusion projection is melted. A method for producing a synthetic resin floor material, characterized in that a portion is cooled and solidified.

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