JPH0531192U - Reinforced plastic composite board for heat generation used on the treads of stairs - Google Patents

Abstract

(57) [Summary] [Purpose] Regarding the reinforced plastic composite plate for heat generation that prevents snow and freezing on the stairs of pedestrian bridges and stations in the snowy area in winter and facilitates the passage of the stairs, It is an object of the present invention to solve the problems that the temperature rise is small and there is a risk of freezing in snowy cold, and that the number of man-hours for processing the non-slip portion is large and the cost is high. [Structure] A heating wire is laid inside a laminate in which reinforced plastic layers are laminated on both front and back surfaces of a resin mortar layer, and a large number of anti-slip projections are provided on the surface of the reinforced plastic layer on the surface side for use on the treads of stairs It is a reinforced plastic composite plate for heat generation. An anti-slip part made of a reinforced plastic of the same material as the reinforced plastic layer on the front surface side is integrally formed at a corner of the stair riser side of the laminate.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a reinforced plastic composite plate for heat generation for preventing snow and freezing of stairs such as pedestrian bridges and stations in the snowy area in winter, and facilitating the passage of the stairs, especially the corners on the kicking side of the stairs. The present invention relates to the structure of the anti-slip portion arranged in the.

[0002]

[Prior Art]

 As a conventional exothermic reinforced plastic composite plate used for the tread surface of this kind of stairs, for example, there are those shown in FIGS. 3 to 5. This is a snow melting electric heating plate 2 which is used after the stairs 1 for snow melting of existing stairs such as subway entrances and exits. This snow melting electric heating plate 2 has heating wires 3 laid on the upper surface at regular intervals. A laminated body 7 composed of a resin mortar layer 4 and reinforced plastic layers 5 and 6 containing glass base cloth formed on both front and back surfaces of the resin mortar layer 4, and attached to corners of the laminated body 7 on the rise side. The anti-slip part 8 is provided. A large number of anti-slip projections 9 for preventing slippage are formed on the entire surface of the reinforced plastic 5 on the front surface side. It is cut out for attachment, and a metal base 12 made of an aluminum alloy for attaching the hollow cushion 11 of the non-slip portion 8 is fixed to the smoothed portion 10 after the cutting by an adhesive 13 and a rivet 14. . The hollow cushion 11 is attached and fixed to the metal base 12, so that the non-slip portion 8 is fixed to the corner of the stack 7 on the kicking side. In the figure, 15 is a power supply cable, 16 is a connecting portion between the heating wire 3 and the power supply cable 15, 17 is a mounting hole for retrofitting to the stairs 1, and 18 is a hole for riveting. .

[0003]

[Problems to be solved by the device]

 However, in the conventional reinforced plastic composite plate for heat generation that is used for the tread of the stairs, a lot of processing work is required to provide the anti-slip portion 8 at the corner of the laminated body 7 on the stair riser side, which is costly. At the same time, there is a problem that the temperature rise of the anti-slip part 8 is small and the anti-slip part 8 may freeze during extremely cold weather. That is, in order to fix the metal base 12 of the anti-slip portion 8 to the laminated body 7 with the adhesive 13, the projection 9 on the surface of the reinforced plastic layer 5 that comes into contact with the metal base 12 is cut off. Since the rivet 14 is used together with the adhesive 13 because the adhesive strength is weak only with the adhesive 13, the hole 18 for the rivet 14 is formed in the smooth portion 10 after the projection 9 is cut off. In addition, many operations such as application of the adhesive 13 to the smooth portion 10 and fastening of the rivet 14 were required. Further, in the drilling process for riveting, the number and positions of the holes 18 cannot be determined in advance when the laminated body 7 is formed, and the number and positions of the holes 18 after the laminated body is formed. Since the drilling work has been carried out after deciding, it is necessary to carry out wiring inside so that the heating wire 3 is not wired in the portion where the hole 18 may be drilled. As a result, since the heating wire 3 is far away from the end of the laminated body 7 on the rise side, the temperature rise of the anti-slip part 8 during use becomes small, and the anti-slip part 8 is formed in the extreme cold when there is snow. There was also the issue of freezing.

The present invention has been made in view of the above conventional problems, and is made of the same material as the reinforced plastic layers provided on the front and back surfaces of the laminated body at the corners of the laminated body on the stair riser side. It is an object of the present invention to solve the above problems by forming a non-slip part made of plastic integrally.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the reinforced plastic composite plate for heat generation used in the tread surface of the stairs in the present invention is such that the heating wire is laid inside the laminated body in which the reinforced plastic layers are laminated on both front and back surfaces of the resin mortar layer. In a reinforced plastic composite plate for heat generation that is provided on the surface of the reinforced plastic layer on the surface side and is used for the tread surface of stairs, at the corner of the riser side of the laminate, the reinforced plastic layer on the surface side The feature is that the non-slip part made of the same material as the reinforced plastic is integrally formed.

It is advisable to adopt a structure in which an aggregate such as sand is fixed to the surface of the non-slip portion.

[0007]

[Action]

 By forming a non-slip part that uses a reinforced plastic of the same material as the material of the reinforced plastic layer on the surface side at the corner on the riser side of the stack, the heating wires inside the stack are evenly distributed throughout the stack. Therefore, the temperature rise of the anti-slip part can be ensured, and the processing work for forming the anti-slip part can be omitted.

Since the aggregate such as sand is fixed to the surface of the non-slip portion, it is possible to increase the frictional force between the non-slip portion and the shoe sole and improve the anti-slip effect.

[0009]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing an essential part of an embodiment of the present invention, and FIG. 2 is a plan view showing the same as a whole. First, the structure will be described. In the figure, reference numeral 20 is a resin mortar layer, and this resin mortar layer 20 contains, for example, unsaturated polyester resin as a main material, sand and foam aggregate (for example, pearlite: heating of volcanic glass). It is formed by applying high pressure to a paste-like material obtained by mixing and kneading an aggregate such as foam, vermiculite: a rapid thermal expansion material of micaceous material) and curing. The mixing ratio of the unsaturated polyester resin and the aggregate varies depending on the particle size of the aggregate, but the unsaturated polyester resin 1 and the sand 6 can be mixed in a weight ratio, for example.

Reinforced plastic layers 21 and 22 are laminated and integrally formed on both front and back surfaces of the resin mortar layer 20, and the resin mortar layer 20, the reinforced plastic layer 21 on the front surface side and the reinforced plastic layer 22 on the back surface side. And form a laminated body 23. The reinforced plastic layers 21 and 22 on the front and back sides are, for example, reinforced by immersing a glass base cloth formed by crossing glass fibers (having a diameter of 9 to 20 microns) in the length and width in a solution of unsaturated polyester resin. It is formed by Further, the glass short fibers obtained by cutting the above glass fibers into short pieces may be kneaded with a solution of an unsaturated polyester resin, and this may be formed into a sheet shape. At this time, a large number of non-slip projections 24 for preventing slip are regularly provided on the surface of the reinforced plastic layer 21 on the surface side to prevent people from slipping.

On the surface of the surface-side reinforced plastic layer 21 of the resin mortar layer 20, heating wires 25 are laid over the entire laminate 23 at appropriate intervals. As the heating wire 25, for example, an insulated wire formed by extruding and covering ethylene and propylene rubber insulator on a heating wire obtained by spirally winding a copper-nickel resistance wire on a glass twisted yarn can be applied. However, since the resin mortar layer 20 forming the laminate 23 and the reinforced plastic layers 21 and 22 on both front and back surfaces are electrical insulators, the insulation of the heating wire 25 is not always required. Absent. As the heating wire used for the heating wire 25, for example, a heating wire of 1.70 Ω / m can be applied, and as a temporary guideline, a heating value of 200 to 400 Watt / m ² when connected to a 200 V power source. Should be set so that As shown in FIG. 2, the heating element 25 is regularly circulated in the laminated body 23, and then connected to the power supply wire 27 via the crimp terminals 26 connected to the respective ends. In this embodiment, the heating element 25 is laid at the boundary between the resin mortar layer 20 and the surface-side reinforced plastic layer 21 so that the heating efficiency of the heating element 25 can be more effectively achieved. The body 25 may be laid inside the reinforced plastic layer 21.

A non-slip portion 28 mainly made of an unsaturated polyester resin, which is the same material as the material of the surface-side reinforced plastic layer 21, is integrally formed at a corner of the laminated body 23 on the stair riser side. The non-slip portion 28 is formed of an unsaturated polyester resin applied from the end face portion of the laminate 23 to the upper end portion of the surface-side reinforced plastic layer 21, and the sand and foam aggregate fixed to the upper surface of the unsaturated polyester resin. It is formed by spraying the aggregate from the upper surface, pressing it so that a part of the aggregate enters the unsaturated polyester resin, and curing the resin while the surface is uneven. ing . Since the unsaturated polyester resin is colorless and transparent, the anti-slip portion 28 can be set to a desired color by adding an arbitrary colorant to the resin and coloring the resin. Also, the slip resistance can be changed by changing the amount of unsaturated polyester resin and the amount of sand. In addition, 29 shown in FIG. 2 is an attachment hole for attaching the composite plate according to the present embodiment to the tread surface of the stairs.

Next, an example of manufacturing the composite plate according to this example will be described. The unsaturated polyester resin for forming the reinforced plastic layer 22 on the back side and the glass base cloth are put in the recess of the heated lower die for pressing (130 to 150 ° C.), and the material of the resin mortar layer 20 is placed on the unsaturated polyester resin and the glass base cloth. A glass base cloth and an unsaturated polyester resin for forming the reinforced plastic layer 21 on the surface side are placed on the top. In this case, the layer thickness of the resin mortar layer 20 is set so as to withstand the load during use. After that, the whole body is heated and pressed by the upper mold to cure the resin by reaction, whereby an integrally laminated body 23 simultaneously molded can be obtained.

Next, an unsaturated polyester resin is applied with a predetermined width to a predetermined position of a corner on the stair riser side of the laminated body 23, sand is sprinkled on the resin, and this is pressed to partially remove the sand. The non-slip part 28 can be formed by pushing the resin into the resin and curing the resin while the surface is uneven.

Next, the operation of this embodiment will be described. The reinforced plastic composite plate for heat generation according to this embodiment is used after being attached to the tread surface of the stairs similarly to the conventional composite plate shown in FIG. In this case, the anti-slip part 28 is formed by mainly using an unsaturated polyester resin of the same material as the material of the surface-side reinforced plastic layer 21, and the unsaturated polyester resin of both is combined to form the anti-slip part 28. It is configured integrally with the laminated body 23.

With the above structure, in the reinforced plastic composite plate for heat generation according to this embodiment, the anti-slip portion 28 has a large binding force with respect to the laminated body 23, and a sufficient binding force without using rivets as in the conventional case. Therefore, when forming the anti-slip portion 28, it is not necessary to form a hole for rivet, and it is not necessary to cut off the anti-slip projection 24 on the upper surface of the surface-side reinforced plastic layer 21. Therefore, it is not necessary to perform not only the drilling work for the rivet holes and the cutting work of the projections 24, but also the adhesive coating work and the riveting stop work, so that the number of work steps and the number of parts used can be reduced. You can Further, as is clear from the comparison between FIG. 2 and FIG. 4, since the heating element 25 can be disposed near the end of the laminated body 23 on the stair riser side, the entire composite plate including the anti-slip portion 28. The temperature can be raised substantially uniformly, and therefore the freezing of the anti-slip portion 28 can be prevented even in extremely cold snow. In addition, since the surface of the anti-slip portion 28 is made of a sand layer to increase the frictional resistance, the frictional force with the shoe sole can be largely secured, and the anti-slip effect can be further improved.

[0017]

[Effect of the device]

 As described above, since the present invention is configured as described above, it has the following effects.

According to the reinforced plastic composite plate for heat generation used for the tread surface of the stairs of claim 1, the corners on the stair riser side of the laminated body are made of the same reinforced plastic as the material of the surface side reinforced plastic layer, and the non-slip part is formed. Since it is integrally formed, it is possible to form a non-slip portion having a sufficient coupling force without using a rivet as in the past, and it is not necessary to drill a rivet hole. Since it is not necessary to cut off the anti-slip projections on the upper surface of the surface-side reinforced plastic layer, there is no need to perform drilling work for rivet holes and cutting out projections, as well as adhesive application work and riveting work. The man-hours can be simplified and the parts used can be reduced, and an inexpensive reinforced plastic composite plate for heat generation can be provided. Furthermore, since the heating element can be arranged near the end of the laminated body on the step-up side, it is possible to raise the temperature of the entire composite plate including the anti-slip part almost uniformly, and this makes it possible to increase the temperature in the extremely cold snowy season. It is possible to reliably prevent freezing of the non-slip part.

According to the reinforced plastic composite plate for heat generation used for the tread surface of the stairs of claim 2, since the structure such that the aggregate such as sand is fixed to the surface of the anti-slip portion, the frictional force between the shoe sole and the sole is reduced. It is possible to secure a large value, and thus the anti-slip effect can be further improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing an essential part of an embodiment of the present invention.

FIG. 2 is a plan view showing the whole of the embodiment shown in FIG.

FIG. 3 is a perspective view showing a state of being attached to a tread of stairs.

FIG. 4 is a plan view showing a conventional reinforced plastic composite plate for heat generation.

5 is a cross-sectional view showing a main part of FIG.

[Explanation of symbols]

 20 Resin Mortar Layer 21, 22 Reinforced Plastic Layer 23 Laminated Body 24 Anti-Slip Protrusion 25 Heating Element 28 Anti-Slip Part

Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H05B 3/20 344 7913-3K

Claims (2)

[Scope of utility model registration request] 1. A heating wire is laid inside a laminate in which a reinforced plastic layer is laminated on both front and back surfaces of a resin mortar layer, and a large number of non-slip projections are provided on the surface of the reinforced plastic layer on the surface side to form a tread surface of stairs. In the reinforced plastic composite plate for heat generation used for, a non-slip part made of a reinforced plastic of the same material as that of the reinforced plastic layer on the surface side is integrally formed at the corner on the stair riser side of the laminate. A reinforced plastic composite plate for heat generation used on the tread of stairs. 2. The reinforced plastic composite plate for heat generation used on the tread of stairs according to claim 1, wherein aggregate such as sand is fixed to the surface of the non-slip portion.