JP2018149773A - Connection structure of resin sheet having reinforcement rib - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection structure of connecting resin sheets to each other with high precision and securely, the resin sheets being having reinforcement ribs abutted to one side of end parts which becomes joint parts.SOLUTION: In the connection structure, resin sheets 21, 21 are connected integrally by: abutting to each other with opposed side end surfaces 21b, 21b; covering the abutment part in the protruding manner and over reinforcement ribs 21a, 21a with a joint part material 22 which has engaging protrusion 22b, 22b being abutted to both side end parts of a belt-like resin sheet part 22a; engaging side wall surfaces 22b1, 22b2 of the engaging protrusions 22b, 22b opposed each other to side wall surfaces 21a1, 21a2 directed in opposed directions of the reinforcement ribs 21a, 21a; and fusing upon heat. A resin sheet chip 23 is thermally fused to an interface between the other surfaces at the abutment end part.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a connection structure in which thermoplastic resin sheets provided with reinforcing ribs in a joint portion are integrally connected by heat fusion.

  As a connection structure between thermoplastic resin sheets (hereinafter referred to as “resin sheets”), for example, as described in Patent Document 1, the end surfaces of the resin sheets are butted together, and heat is applied between one side of the resin sheet at the butted portion. There is known a connection structure in which adhesive resin tapes are overlapped and connected by heat fusion.

  Moreover, in patent document 2, the joint body made from a thermoplastic resin which has a groove | channel with a U-shaped cross section opened toward the outer side which opposes both sides is used, and it is each in the groove | channel of the said both sides of this joint body. A connection structure is disclosed in which resin sheets are integrally connected via a joint body by inserting opposite end portions of the resin sheet and heat-sealing the inserted sheet end portion and the joint body.

JP 2001-252983 A JP-A-9-131798

  However, as described in Patent Document 1, in the connection structure in which the end surfaces facing each other of the resin sheets to be connected are butted and the resin tape is overlapped and heat-sealed, the resin tape is used. The resistance force against the tensile force acting in the width direction is weak, and there is a possibility that problems such as peeling or breakage from the connecting portion, and deterioration in durability may occur.

  Moreover, it is difficult to connect while holding the end surfaces of the resin sheets in a state where they are accurately butted, and there is a possibility that a situation where an accurate connection structure cannot be obtained may occur.

  On the other hand, according to the connection structure of the resin sheet described in Patent Document 2 above, since the joint body that can receive and hold the opposing end portions of the resin sheet to be connected to each other is used, Although the connection can be made with high accuracy, there is a problem in that sufficient connection strength cannot be obtained because the resistance force to the tensile force acting in the direction of separating from each other is weak as described above.

  Moreover, in the connection structure of the said resin sheet, even if it can employ | adopt for the connection of the resin sheet currently formed in the surface where both front and back are flat, resin sheets with which the reinforcement rib is provided in the joint part which should be connected In order to connect, a connecting structure in which a resin tape or the like is overlapped and heat-sealed only between flat flat surfaces without reinforcing ribs, and the reinforcing ribs cannot be integrally connected.

  Therefore, it is difficult to produce a wide range of resin sheets having excellent durability by connecting resin sheets having a certain width and a certain length having reinforcing ribs on one side obtained by resin molding so as to have sufficient connection strength. There is a problem such as.

  The present invention has been made in view of such problems, and the object of the present invention is to provide a connection structure in which resin sheets having reinforcing ribs at least at end portions serving as joint portions are accurately and firmly connected to each other. To provide.

  In order to achieve the above object, a resin sheet connection structure having a reinforcing rib according to the present invention is a resin sheet connection structure in which a reinforcing rib is provided on one side of a side end portion serving as a joint portion. The above-mentioned reinforcements that face opposite latching ridges projecting on both side ends of the joint member, where the opposing side end surfaces are abutted and the reinforcing members facing each other through the abutting part are covered with the joint member It is hooked to the outer wall surface facing the opposite direction of the ribs and integrally connected by heat fusion, and further, a resin sheet piece is overlapped between the other surfaces of the butt end portion, and by heat fusion The other one side is integrally connected.

  In the resin sheet connecting structure having the reinforcing ribs configured as described above, the invention according to claim 2 is the resin sheet in which the resin sheet is provided with reinforcing ribs having a length equal to the length of the resin sheet on one entire surface of the resin sheet. It protrudes in the width direction of this at regular intervals.

  According to a third aspect of the present invention, the reinforcing rib projecting from the resin sheet and the latching ridge projecting from the joint member are formed to have a quadrangular cross section, and the reinforcing rib and the latching projection are formed. The strips have the same thickness, and the thickness is the same as or a half of the interval between the opposing side wall surfaces of the adjacent reinforcing ribs or hooking projections.

  In the first to third aspects of the present invention, in the invention according to the fourth aspect, the joint member is hung on the both side end portions of the sheet portion having a constant width made of the same resin material as the resin sheet. It is characterized by a protruding protrusion.

  The invention according to claim 5 is characterized in that the reinforcing ribs are projected on the end portions of the resin sheets so that the side walls facing the reinforcing ribs are flush with the abutting end surfaces of the resin sheets. .

  In the invention according to claim 6, the joint member includes a pair of inner latching ridges that are latched by reinforcing ribs that are joined to each other in the resin sheet in which the side end surfaces are butted together. A pair of outer hooking protrusions hooked on the reinforcing ribs adjacent to the outer sides of the reinforcing ribs are provided so as to project.

  According to the invention which concerns on Claim 1, it is in the state made into the state latched by the latching protrusion which is projecting on the joint member between the reinforcement ribs which the resin sheets project on the abutting edge part. Since they are integrally connected by heat fusion, it is possible to exert a large resistance to the tensile force acting in the direction of separating the resin sheets and firmly prevent peeling from the connecting portion.

  Furthermore, since the surfaces opposite to the surfaces connected by the joint member in the resin sheet are integrally connected by heat fusion of the resin sheet pieces, between the side end surfaces where the resin sheets are abutted together with the joint member Can be connected more firmly, and a connection structure excellent in waterproofness can be provided.

  According to the invention according to claim 2, since the resin sheet projects reinforcing ribs having a length equal to the length of the resin sheet on the entire surface of the resin sheet at regular intervals in the width direction of the resin sheet. The reinforcing ribs can give the resin sheet excellent pressure resistance against water pressure and the like, and can easily stretch the resin sheet in a tension state.

  According to the third aspect of the present invention, the reinforcing rib projecting from the resin sheet and the latching ridge projecting from the joint member are formed in a quadrangular cross section, and the reinforcing rib and the hanging The stop ridge has the same thickness, and the thickness thereof is the same as or a half of the distance between the side wall surfaces facing each other in the adjacent reinforcing rib or the engaging ridge.

  Therefore, even if the reinforcing ribs protruding from the resin sheet to be connected are joined to each other in abutting manner or opposed to each other with a gap, the hooks protruding from both ends of the joint member are projected. The resin sheets can be firmly connected to each other in a hooked state or a fitted state in which the reinforcing ribs are securely and easily sandwiched by the stop protrusions.

  Further, according to the invention of claim 4, the joint member protrudes the latching protrusions of the same size and the same shape as the reinforcing ribs at both side end portions of the sheet portion having a constant width made of the same resin material as the resin sheet. Therefore, the joint member can be obtained by cutting the resin sheet provided with the reinforcing rib, and the resin sheets can be easily and accurately connected to each other by the joint member.

  Moreover, according to the invention which concerns on Claim 5, a reinforcement rib is protrudingly provided on the edge part of the resin sheet so that the side wall surface which a reinforcement rib opposes may become flush with the side end surface which the resin sheets faced each other. Therefore, the resin sheets can be connected with high accuracy by joining the reinforcing ribs in a butted manner, and a continuous wide resin sheet can be easily obtained.

  According to the invention which concerns on Claim 6, a pair of inner side latching protrusion which connected the reinforcement rib currently joined to the side edge part of the resin sheet which should be connected mutually in abutting state to the joint member, and the said reinforcement Since the pair of outer latching protrusions each connecting the reinforcing ribs are provided on the outer sides of the ribs, it is possible to provide a strong connection structure with extremely high tensile strength.

The perspective view which notched and showed a part which shows one Example of the connection structure of a resin sheet. The front view. FIG. The perspective view which notched and showed a part which shows another Example. The front view. FIG. Furthermore, the perspective view which notched some cross sections which show another Example. The front view. FIG.

  Next, specific embodiments of the present invention will be described with reference to the drawings. 1 to 3 show an embodiment. Reference numerals 1 and 1 denote a thermoplastic resin sheet having a constant thickness in which opposite side ends thereof are connected by a joint member 2, specifically, fiber-reinforced thermoplastic. It is a resin sheet (hereinafter simply referred to as resin sheet 1). The fiber contained in the fiber reinforced thermoplastic resin sheet is not particularly limited, and examples thereof include glass fiber and carbon fiber.

  This resin sheet 1, 1 has a cross section having a length equal to the length of the resin sheet 1 on one side of the joint part (side end part) with the opposing side end connected by the joint member 2 as a joint part. A rectangular straight reinforcing rib 1 a is provided so as to protrude over the entire length of the resin sheet 1. The reinforcing rib 1a is made of the same resin material as the resin sheet 1 and is formed integrally with the resin sheet 1.

  The reinforcing rib 1a has a constant thickness, and both side wall surfaces 1a1 and 1a2 stand up at right angles to the flat surface of the resin sheet 1. These reinforcing ribs 1a are provided at a portion spaced apart from the opposing side end faces 1b, 1b of the resin sheet 1, and therefore the opposing side end faces 1b, 1b of the resin sheet 1, 1 are in contact with each other. Are arranged in parallel with each other. The thickness of the reinforcing rib refers to the dimension of the base end of the reinforcing rib in the direction orthogonal to the length direction of the reinforcing rib (the left-right direction in FIG. 2).

  The joint member 2 is made of the same resin material as the resin sheet 1, that is, a fiber-reinforced thermoplastic resin, but may be formed of a thermoplastic resin that does not contain other fibers. The resin sheet 1 may also be formed from a thermoplastic resin that does not contain fibers other than the fiber-reinforced thermoplastic resin. The joint member 2 has the same length as the resin sheet 1, and the width is a rectangular shape formed wider than the width between the opposing reinforcing ribs 1a and 1a of the resin sheets 1 and 1 which face each other. The joint sheet portion 2a, and the engagement ribs 2b, 2b having a rectangular cross section in which the reinforcing ribs 1a, 1a are opposed to the opposing inner wall surfaces 2b1, 2b1 at both ends of the joint sheet portion 2a, It is composed of

  Specifically, the width dimension between the opposing inner wall surfaces 2b1 and 2b1 of the hooking protrusions 2b and 2b projecting from both end portions of the joint member 2 is a resin sheet in which the side end surfaces 1b and 1b are butted together. 1, 1 and 1 are formed so as to be equal to the width dimension between outer wall surfaces 1a2 and 1a2 facing opposite directions of opposing reinforcing ribs 1a and 1a. The protruding length of the latching ridge 2b protruding from the joint member 2 is the same as the protruding length of the reinforcing rib 1a protruding from the resin sheet 1 or shorter than the protruding length of the reinforcing rib 1a. ing.

  The joint member 2 configured as described above is placed between the opposing reinforcing ribs 1a and 1a of the resin sheet 1 and 1 which face each other on the side end faces 1b and 1b, and is opposed to the latching protrusions 2b and 2b on both sides thereof. The inner wall surfaces 2b1 and 2b1 to be engaged are hooked to the outer wall surfaces 1a2 and 1a2 facing the opposite directions of the reinforcing ribs 1a and 1a in a surface-bonded state, and are enclosed between the hooking protrusions 2b and 2b of the joint member 2. In this state, they are integrally connected by heat fusion.

  That is, the resin sheets 1 and 1 are connected by the joint member 2 by heat-sealing a portion where the reinforcing rib 1a and the latching protrusion 2b are in contact with each other. Further, a strip-shaped resin made of a thermoplastic resin sheet material is provided on one side opposite to the surface where the reinforcing rib 1a is projected from the side end of the resin sheet 1, 1 in which the side end surfaces 1b, 1b are butted together. The sheet pieces 3 are overlapped and the side ends of the resin sheets 1 and 1 are integrally connected by heat fusion.

  The resin sheet piece 3 is formed in a rectangular shape having the same width and the same length as the joint member 2, and therefore, the side end surfaces 1 b and 1 b of the resin sheets 1 and 1 abutted by the resin sheet piece 3 have a full length. It is covered without gaps. Further, the resin sheet pieces 3 and the joint member 2 integrally connect the side end portions of the resin sheets 1 and 1 from both sides of the opposite end portions of the resin sheets 1 and 1 by heat fusion. The width of the resin sheet piece 3 does not necessarily have to be the same as the width of the joint member 2.

  According to the resin sheet connecting structure configured as described above, the resin sheets 1 and 1 having the reinforcing ribs 1a at the side end portions are integrally connected in the width direction by the joint member 2 to form a wide resin sheet. When a tensile force acts on the resin sheets 1 and 1 connected by the joint member 2 in the direction of pulling them apart from each other, the reinforcing ribs 1a and 1a projecting from the abutted side ends become the reinforcing ribs 1a and 1a. It is crimped and received on the inner wall surfaces 2b1 and 2b1 of the latching ridges 2b and 2b of the joint member 2 to be joined, and exhibits a large resistance to the tensile force.

  Further, since the joint member 2 and the resin sheet piece 3 are connected between both surfaces of the abutting side end portions of the resin sheets 1 and 1, the side end surface 1b abutted against each other exhibits a stronger connection strength. , 1b is entirely covered with the resin sheet piece 3, so that water can be prevented from entering through the gap between the side end faces 1b, 1b, and a wide range of resin sheets excellent in waterproofness can be provided. be able to.

  4 to 6 show another embodiment of the resin sheet connection structure of the present invention. In the above embodiment, the reinforcing rib 1a is protruded only at the opposite side end portions of the connected resin sheets 1 and 1. FIG. However, in this embodiment, a reinforcing rib 11a having a length equal to the length of the resin sheet 11 is provided on the entire surface of one surface of the resin sheet 11 so as to protrude at regular intervals in the width direction of the resin sheet 11. is there.

  The resin sheet 11 is made of the same thermoplastic resin material as the resin sheet 1 of the above embodiment, and the numerous reinforcing ribs 11a projecting in parallel to the resin sheet 11 are also the same as in the above embodiment. It consists of the same resin material as the resin sheet 11. Further, the reinforcing rib 11a is also formed in a rectangular shape in cross section and is formed in a straight shape having a constant thickness over the entire length of the resin sheet 11, and both side wall surfaces 11a1 and 11a2 are formed on the flat surface of the resin sheet 11. It stands up at a right angle.

Two of the resin sheets 11 and 11 configured in this manner are arranged side by side with their side end faces 11b and 11b butting each other, and the reinforcing ribs 11a projecting from opposing side end portions (joint portions) , 11a
The gap is connected by a joint member 12 made of the same resin material as the resin sheet 11 in the same manner as the joint member 2 of the above embodiment.

  Reinforcing ribs 11a and 11a projecting on the opposed end portions of the connected resin sheets 11 and 11 are formed so that the opposed side wall surfaces 11a1 and 11a2 face the opposite side end surfaces 11b and 11b of the resin sheets 11 and 11, respectively. It protrudes upward so as to be in a single shape, and is joined in contact with each other. The reinforcing ribs 11a, 11a adjacent to the reinforcing ribs 11a, 11a are connected by the joint member 12.

  The joint member 12 has the same length as that of the resin sheet 11, and the width thereof is for a band-shaped joint formed wider than the width between the reinforcing ribs 11a and 11a adjacent to the reinforcing ribs 11a and 11a joined to each other. The seat portion 12a is composed of latching protrusions 12b and 12b having a quadrangular cross section projecting from both end portions of the joint seat portion 12a. The latching ridges 12b and 12b are heated and melted in such a state that the opposing inner wall surfaces 12b1 and 12b1 are hooked on the outer wall surfaces 11a1 and 11a2 facing the opposite directions of the outer reinforcing ribs 11a and 11a, respectively. I wear it.

  That is, the resin sheets 11 and 11 are connected by the joint member 12 by heat-sealing the portion where the reinforcing rib 11a and the latching protrusion 12b are in contact with each other. Further, a strip-shaped resin sheet piece 13 made of a thermoplastic resin sheet material is provided on one side of the resin sheet 11, 11 in which the side end surfaces 11b, 11b are abutted with each other on the side opposite to the surface where the reinforcing rib 11a is projected. The side end portions of the resin sheets 11 and 11 are integrally connected by superposition and heat fusion.

According to the connection structure of the resin sheet configured as described above, in the same manner as in the above embodiment, when a tensile force is applied to the resin sheets 11 and 11 connected by the joint member 12 in the direction of separating from each other, the resin sheet 11, 11 of the reinforcing ribs 11a and 11a and the latching protrusions 12b and 12b of the joint member 12
Can exert a large resistance to the tensile force.

  Furthermore, since the abutted side end surfaces 11b and 11b are entirely covered with the resin sheet piece 13, it is possible to prevent water from entering through the gap between the side end surfaces 11b and 11b.

  In addition, the reinforcing ribs 11a and 11a projecting on the opposite end portions of the resin sheets 11 and 11 join the opposing side wall surfaces in contact with each other. It is possible to connect easily and accurately without doing so. The joint member 12 may be narrowed and connected so that only the joined reinforcing ribs 11a and 11a are sandwiched by the opposing latching ridges 12b and 12b.

  FIGS. 7 to 9 show still another embodiment of the resin sheet connection structure of the present invention. The resin sheets 11 and 11 formed by projecting a large number of the reinforcing ribs 11a are connected by a joint member 12. FIG. In the above embodiment, the thickness of the reinforcing rib 11a and the latching ridge 12b protruding from the joint member 12, and the interval between the reinforcing ribs 11a and 11a and the latching ridge 12b and 12b are specified. It is what.

  That is, the thickness of the reinforcing rib 21a formed integrally with the resin sheet 21 on one side of the resin sheet 21 made of the same thermoplastic resin as the resin sheets 1 and 11 in the above embodiment is set so that the adjacent reinforcing ribs 21a face each other. It is formed to have a thickness that is half the width interval between the side wall surfaces 21a1 and 21a2. In other words, the width interval between the opposing side wall surfaces 21a1 and 21a2 of the adjacent reinforcing ribs 21a and 21a is formed to be twice the thickness of the reinforcing rib 21a.

  A plurality of the reinforcing ribs 21a projecting in parallel from the resin sheet 21 have a length equal to the length of the resin sheet 21 and a rectangular body having a rectangular cross section, as in the above embodiment. The both side wall surfaces 21a1 and 21a2 stand up at right angles to the flat surface of the resin sheet 11.

Two of the resin sheets 21 and 21 configured in this manner are arranged side by side in a state where the side end faces 21b and 21b are in contact with each other, and the reinforcing rib 21a protrudes from the opposite side end (joint portion). , 21a
They are connected by a joint member 22 made of the same resin material as the resin sheet 11. The outermost reinforcing ribs 21a, 21a projecting on the opposed end portions of the connected resin sheets 21, 21 are arranged so that the opposite side wall surfaces 21a1, 21a2 are opposed to the opposite sides of the resin sheets 21, 21. The end surfaces 21b and 21b protrude upward so as to be flush with each other, and are joined to each other in a contact state.

  The joint member 22 has the same length as the resin sheet 21 and has a width wider than the width between the reinforcing ribs 21a and 21a adjacent to the reinforcing ribs 21a and 21a joined to each other. The structure is such that four latching ridges 22b are projected in parallel on one side of the seat portion 22a.

The hooking protrusion 22b protruding from the joint member 22 is formed to have the same thickness as the reinforcing rib 21a protruding from the resin sheet 21, and the thickness thereof is adjacent to the hooking protrusion 22b. , 22b
Are formed to a thickness that is ½ of the width interval between the opposing side wall surfaces 22b1 and 22b2. In other words, the width interval between the opposing side wall surfaces 22b1 and 22b2 of the adjacent latching ridges 22b and 22b is formed to be twice the thickness of the latching ridge 22b. The thickness of the latching ridge refers to the dimension of the base end of the latching ridge in the direction perpendicular to the length direction of the latching ridge (the left-right direction of the paper surface in FIG. 2).

  Therefore, the sheet portion 22a of the joint member 22 has the same thickness and the same length as the resin sheet 21, and the latching protrusions 22b and 22b are formed in the same size and shape as the reinforcing rib 21a. In addition, the interval between the adjacent latching protrusions 22b and 22b and the interval between the adjacent reinforcing ribs 21a and 21a are the same. Therefore, the joint member 22 can be obtained by cutting the resin sheet 21 provided with the multiple reinforcing ribs 21a at regular intervals.

The joint member 22 includes reinforcing ribs 21a in which the side wall surfaces of the resin sheets 21 and 21 in which the pair of inner retaining protrusions 22b and 22b adjacent to each other at the center portion in the width direction of the sheet portion 22a are joined to each other are joined. 21a and the opposing side wall surfaces 22b1 and 22b2 are covered with these reinforcing ribs 21a.
, 21a are respectively hooked on the side wall surfaces 21a1 and 21a2 facing in opposite directions.

  Similarly, a pair of outer latching protrusions 22b, 22b projecting from both side end portions of the seat portion are placed between the reinforcing ribs 21a, 21a adjacent to the joined reinforcing ribs 21a, respectively, and opposite sides thereof. The wall surfaces 21a1 and 21a2 are respectively hooked on the side wall surfaces 21a1 and 21a2 facing the opposite directions of the reinforcing ribs 21a and 21a.

  Accordingly, the joint ribs 22a and 21a, which are connected to each other, are sandwiched between the pair of adjacent inner latching ridges 22b and 22b of the joint member 22 and project from the opposite ends of the resin sheets 21 and 21, respectively. Reinforcing ribs 21a and 21a adjacent to the joined reinforcing ribs 21a and 21a are sandwiched by the pair of outer latching protrusions 22b and 22b, respectively.

  In this state, the portion where the reinforcing rib 21a and the latching protrusion 22b are in contact with each other is integrated by heat fusion, and the resin sheets 21 and 21 are connected by the joint member 22. Further, a strip-shaped resin sheet piece 23 made of a thermoplastic resin sheet material is overlapped between the side end portions of the resin sheets 21 and 21 so as to face each other on the surface opposite to the surface on which the reinforcing rib 21a is projected. Thus, the side end portions of the resin sheets 21 and 21 are integrally connected by heat fusion.

  In the above embodiment, the width interval between the side wall surfaces 22b1 and 22b2 facing the adjacent reinforcing ribs 21a and 21a provided on the resin sheet 21 is twice the thickness of the reinforcing rib 21a. Although formed, the dimension of the width interval between the opposing side wall surfaces 21a1 and 21a2 of the adjacent reinforcing ribs 21a and 21a may be made equal to the thickness of the latching protrusion 22b.

  In this case, also in the latching ridge 22b protruding from the joint member 22, the thickness of the latching ridge 22b is the same as that of the reinforcing rib 21a, and the adjacent latching ridges 22b and 22b The width between the opposing side wall surfaces 22b1, 22b2, 22b is made equal to the thickness of the latching protrusion 22b.

According to the connection structure of the resin sheet configured as described above, in the same manner as in the above embodiment, when a tensile force is applied to the resin sheets 21 and 21 connected by the joint member 22 in the direction of separating from each other, the resin sheet 21, 21. Ribs 22b, 22b of the coupling member 22 latched on the 21 reinforcing ribs 21a, 21a
Can exert a large resistance to the tensile force.

  Furthermore, since the abutted side end surfaces 21b and 21b1 are entirely covered with the resin sheet piece 23, it is possible to prevent water from entering through the gap between the side end surfaces 11b and 11b.

  Further, all the latching ridges 22b, 22b projecting from the joint member 22 are securely and firmly latched to the reinforcing ribs 21a projecting on the opposite side ends of the resin sheets 21, 21. A connection structure for the resin sheet can be obtained, and a connection structure having a large tensile resistance and excellent durability can be provided.

1, 11, 21 Resin sheet
1a, 11a, 21a Reinforcing rib
1b, 11b, 21b side end face 2, 12, 22 Joint member
2a 12a, 22a Seat part
2b, 12b, 22b Hanging protrusion 3, 13, 23 Resin sheet

Claims (6)

  It is a resin sheet connection structure in which a reinforcing rib is protruded on one side at a side end part to be a joint part, and opposite side end surfaces of the resin sheets are abutted against each other and the reinforcing ribs opposed via the abutting part The joint member is covered, and the latching ridges projecting from both end portions of the joint member are hooked to the opposite outer wall surfaces of the reinforcing ribs facing each other and integrated by heat fusion. Further, a resin sheet having a reinforcing rib, wherein a resin sheet piece is superposed between the other one surface at the butt end portion, and the other one surface is integrally connected by heat fusion Sheet connection structure.   The reinforcement according to claim 1, wherein a reinforcing rib having a length equal to the length of the resin sheet is provided on the entire surface of one side of the resin sheet at regular intervals in the width direction of the resin sheet. Connection structure of resin sheet having ribs.   The reinforcing rib projecting on the resin sheet and the latching ridge projecting on the joint member are formed in a square cross section, and these reinforcing ribs and the latching ridge have the same thickness, 3. The reinforcing rib according to claim 1, wherein the thickness of the reinforcing rib is equal to or a half of a distance between adjacent side walls of the reinforcing rib or the hooking protrusion. 4. A resin sheet connection structure comprising:   The joint member is provided with protruding protrusions having the same size and the same shape as the reinforcing ribs at both end portions of a fixed width sheet portion made of the same resin material as the resin sheet. The connection structure of the resin sheet which has a reinforcement rib of Claim 2 or Claim 3.   The reinforcing ribs are projected on the end portions of the resin sheets so that the side wall surfaces of the reinforcing ribs are flush with each other at the abutting end surfaces of the resin sheets. The connection structure of the resin sheet which has a reinforcement rib of Claim 3.   The joint member includes a pair of inner hooking protrusions that are hooked to the reinforcing ribs that are bonded to each other in the resin sheet in which the side end surfaces are butted to each other, and reinforcing ribs that are adjacent to the outer sides of the reinforcing ribs, respectively. 6. The resin sheet connection structure having a reinforcing rib according to claim 3, wherein a pair of outer hanging protrusions are provided so as to protrude.

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