JP2680613B2 - Glass fiber reinforced resin molding grid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is configured by mechanically engaging a lattice formed by reinforced with glass fiber, in particular, a drawn rod rod for a glass fiber reinforced resin lattice. Regarding the lattice.

[Conventional technology]

In recent years, a lattice structure made of glass fiber reinforced resin has been used. This is because the encapsulating resin has high wear resistance and fire resistance, and is used in various ways such as in a mode where sparks are not allowed as in the field of liquid hydrocarbon production, or as a ship deck. This is because it can be applied.

As a first lattice using such glass fibers, a glass fiber reinforcing material which is required to be installed by orthogonally installing horizontal rods together with an appropriate amount of glass fiber threads in a cavity of a mold and performing compression molding, There is a grid.

Further, as the second lattice, there is a lattice in which a member such as a vertical bar member or a horizontal bar member is manufactured by a drawing process and the members are engaged with each other. In the pultrusion process, fibers as a reinforcing material are passed through a liquid resin tank and put into the head of the mold. The molten resin becomes a continuous solid in the mold.

As one of the lattices by pultrusion, Duradec (DU
There is a grid made of glass fiber reinforced resin sold by Aligned Fiber Composites of Misoneta Chatfield under the trademark RADEK), which is a support bar with a length of 15.24 to 609.6 cm made by pultrusion. After molding, these supporting rods are arranged in parallel at intervals of several cm to several tens of cm. Then, a plurality of holes are pre-drilled along the axial direction on the side surface of the supporting rod, and when assembling the lattice, the holes of each supporting rod are positioned on the same line, and a normal lateral connecting rod is placed in this hole. It is done by inserting. The connecting rod has a circular cross section, the diameter of which is the same as the diameter of the hole previously drilled or formed in the supporting rod. Then, the crossing portion of the connecting rod and the supporting rod is adhered and fixed using an appropriate adhesive.

[Problems to be solved by the invention]

However, the above-described first lattice has a problem that the size of the lattice portion is small due to the size of the compression molding die and the mechanical limitation for storing the reinforcing glass fiber in the cavity of the die.

Further, the second lattice is more advantageous in cost than the above-mentioned compression molding, but has a problem in engagement of the vertical rods, that is, the support rods. That is, high dimensional accuracy is required to ensure proper engagement between the connecting rod and the supporting rod, and the connecting rod and the hole must be aligned on the same line before inserting the connecting rod. There is a problem of high cost. Further, there is a problem that the strength of the support rod is considerably reduced due to the plurality of holes formed on the side surface along the axial direction of the support rod, and the durability of the whole lattice against twisting, bending and other loads is low. .

Therefore, it is an object of the present invention to provide a glass fiber reinforced resin lattice in which a support rod and a horizontal rod formed by pultrusion are orthogonally engaged with each other by a method of minimizing a decrease in strength.

[Means for solving the problem]

The present invention relates to a grid formed by molding a glass fiber reinforced resin, wherein a first rod member and a second rod member formed by molding the glass fiber reinforced resin are used.
The first rod is made of a supporting rod having a rectangular cross section, which is a base, and the supporting rod has opposite side faces and an upper end face. A bar member having a thickness T and a height H having a lower end surface, and each support bar member is formed with an inverted U-shaped recess having a vertical depth D in the axial direction of the upper end surface. Has a groove portion which is inclined downward and outward in the opposite direction. The inclined groove portion opens outward and upward in the vicinity of the upper end surface of the support rod to form an inclined cam surface, and the upper end of the inclined cam surface has a distance W ″. And the second bar is a self-engagement type horizontal bar reinforced with glass fiber and has a reverse U-shaped cross-section. A base portion and a pair of legs that open downwardly outward, the thickness of the legs being equal to the width of the branched groove portion of the inverted U-shaped recess of the support rod, The vertical height H ″ of the horizontal bar is greater than the vertical depth D of the inverted U-shaped recess of the support bar, and the horizontal bar opens with a flat upper end surface and an outward slant. And a rectangular side engaging recess is formed in the axial direction of each leg of the horizontal bar, and the width W'of the engaging recess is equal to the thickness T of the supporting bar and the height H thereof. ′ Is lower than the vertical height H ″ of the horizontal bar, and the engaging recess has vertical side surfaces that are parallel to and opposite to each other and contact both side surfaces of the support bar. The rectangular engaging recesses of both legs have horizontal end faces that are separated from each other so that the distance between opposite side surfaces of the horizontal bar is S, and this distance S is an inverted U-shape of the support bar. It is smaller than the distance W ″ between both upper ends of the opposite inclined cam surfaces of the upper ends of the opposite inclined grooves of the mold concave portion, and the engaging concave portion of the horizontal bar member When it is inserted into the inverted U-shaped recess, the upper side of the engaging recess of the leg of the horizontal bar is deformed inward by the engaging action of the cam surface of the upper end of the inclined groove, and this temporary horizontal bar The horizontal bar is inserted into the inverted U-shaped recess of the support bar due to the deformation of the leg part of the support bar, and the inclined leg part of the horizontal bar is completely aligned with the inclined surface of the groove part inclined downward and outward of the support bar. The horizontal bar and the support bar are engaged by being in contact with, and after the grid is assembled, the surface contact resistance and the repulsive force between the inclined leg of the horizontal bar and the groove of the support bar. The horizontal bar is prevented from detaching from the support bar by the above, and the vertical height of the engaging recess of the leg of the horizontal bar is the same as the overall height of the horizontal bar. Determined by the relationship with the depth of the inverted U-shaped recess of the supporting rod, the mechanical engagement between the horizontal rod and the supporting rod in the engaging recess is completed. The upper end surface and the upper end surface of the support rods of the cross bar member was configured as coplanar when the.

[Action]

The grid according to the present invention is a grid made of glass fiber reinforced resin, and the first rod and the second rod formed of the glass fiber reinforced resin are parallel to each other, and the other rods are parallel to each other. It is configured to engage so as to cross. The first bar is a support bar having a rectangular cross section, and a plurality of inverted U-shaped recesses are formed on the upper end surface of the first bar along the axial direction. The concave portion has two groove portions that are inclined downward and outward in the opposite direction, and the upper end portion of the groove portion is opened upward and outward in the vicinity of the upper end surface of the support rod to be inclined to form a cam surface. The second bar has an inverted U-shaped cross section and has a horizontal base and a set of legs that open downwards and outwards, the thickness of which is equal to the width of the bifurcated groove above. The part fits into the groove. A rectangular engaging recess is formed in the leg portion of the horizontal bar along the axial direction, and the engaging recess has a width equal to the thickness of the supporting bar upward from the lower free end of the leg. Is formed to have a height lower than the vertical height of the. The cross bar has its engaging recess pressed into a reverse U-shaped recess formed in the upper end surface of the support bar, and the cam surface deforms the inclined leg of the cross bar. Due to the temporary deformation of the legs, the legs of the engaging recesses are fitted into the inclined grooves of the inverted U-shaped recesses of the supporting rod to mechanically engage the first rod and the second rod. Is done.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a part of a lattice formed by orthogonally forming a plurality of lattice rods made of glass fiber reinforced resin by drawing. In FIG. 1, the lattice 10 is composed of a plurality of support rods 12 and horizontal rods 14 which are arranged in parallel, and the support rods 12 and the horizontal rods 14 respectively have upper end surfaces 18 and 22 which are horizontal planes. The upper end surfaces 18 and 22 form a flat support surface. The rods 12 and 14 are strongly engaged with each other by mechanical engagement due to deformation of the horizontal rod 14 at a plurality of intersecting positions of the horizontal rod 14 and the support rod 12 in the axial direction. The support bar 12 is larger than the horizontal bar 14 and its cross section has a thickness T and a height H.
Has a rectangular shape that is several times its thickness. The support bar 12 has opposite vertical side surfaces 16, a top surface 18 and a bottom surface 19. An inverted U-shaped recess 20 is formed in the upper end surface 18 of the support bar 12 in the axial direction, and the base portion of this recess 20 is composed of two groove portions 20a and 20b that are branched and inclined. The upper part is opened to form an opening 20c. The inverted U-shaped recess 20 of the support bar has two features. The first feature is
That is, the two groove portions 20a and 20b are formed below the upper end surface 18 so as to be separated from each other at an angle α with respect to the normal line of the upper end surface 18. The second feature is that the groove portion 20a,
At a portion where each end face of 20b is close to the upper end face 18, each end face is inclined to form a cam face 21 which is inclined so as to be separated outward, and the cam face 21 includes a support rod 12 and a horizontal rod 14. Is to deform the opposite side faces 24 of the horizontal bar member 14 inwardly when mechanically engaging at the intersection.

The horizontal bar 14 has a rectangular engaging recess 30 in the axial direction. The engaging recess 30 has a vertical height H'and a width W'in the axial direction of the bar. This width W'corresponds to the thickness T of the support bar 12, and the horizontal end face of the horizontal bar 14 at the engaging recess forming position.
The vertical height from 34 to the upper end surface 22 is equal to the depth D of the branched grooves 20a, 20b of the inverted U-shaped recess of the support bar 12.

Each cross bar 14 is preferably made of pultruded glass fiber reinforced resin and has an inverted U-shaped cross-sectional shape that matches the inverted U-shaped recess 20 formed in the support bar 12. Horizontal bar
The height H ″ of 14 is greater than the depth D of the inverted U-shaped recess 20.
The horizontal bar member 14 has two inclined leg portions 29 that are branched into two, and the leg portions 29 form an inclined side surface 24, and the side surface 24 forms an angle with the normal direction of the upper end surface 22. form β. The angle β is preferably β = 10 °. Axial groove of horizontal bar 14
A lower end surface 38 is formed by 26, and the horizontal bar 14 has an inverted U-shaped cross-sectional shape that is equal to the inverted U-shaped recess 20 of the support bar 12.

An inclined leg portion 29 is formed by this sectional shape, and the leg portion 29 is formed so as to extend from the horizontal base portion 28. The cross-sectional shape and dimensions of this horizontal bar material are inverted U-shaped recesses 20.
It is equivalent to the shape and size of. In addition, the legs of the horizontal bar
The lateral width W'of the rectangular engaging recess 30 formed in 29 is equal to the thickness T of the support bar, so that when the bars are mechanically engaged the rectangular shape as shown in FIG. The opposite surfaces 36, 36 of the concave engagement recess 30 are side surfaces 16, which are on the opposite side of the support bar 12.
Abut with 16. Further, the horizontal end surface 34 of the engaging recess 30 of the horizontal bar 14 contacts the bottom surface 40 of the inclined groove of the support bar 12.

The orthogonal mechanical engagement between the plurality of horizontal rods 14 and the plurality of support rods 12 causes the tilted grooves 20a, 20b of the inverted U-shaped recess of the support rods 12 laid as shown in the figure. This is performed by mechanical deformation of the opposite side surfaces 24, 24 of the horizontal bar member 14 when the end side 32 of the rectangular engaging recess 30 of the horizontal bar member 14 contacts the cam surface 21. When the horizontal bar 14 is pushed downward as shown in FIG.
The neighboring side surface 24 will bend inward. And
The distance S between the end sides 32, 32 of the horizontal bar 14 is determined by the leg 2 of the support bar 12.
It is smaller than the distance W ″ between the upper ends of the cam surface 21 of 0.
The position of the leg 29 shown by the dotted line in FIG. 2 is the inclined cam surface of the inverted U-shaped recess 20 formed in plural in the axial direction of the support rod.
21 shows the position of the leg portion 29 which is deformed due to the contact with the end side 32 of each engaging recess 30 of the horizontal bar 14. Therefore, as in the illustrated example, when the recess 30 for engaging the horizontal bar is inserted into the recess 20 of the support bar at the intersecting position of the horizontal bar and the support bar, the leg portion of the horizontal bar is partially removed. The side 24 of the horizontal bar is a supporting bar
It is inserted into the lateral bar material fitting portion consisting of 12 inverted U-shaped recesses. Further, the rectangular engaging recess 30 of the horizontal bar member 14 prevents the horizontal bar member 14 from being displaced along its axial direction, whereby the preset axial distance between the supporting bar members is kept constant. Be done. This is the opposite side surface of the engaging recess 30.
As a result, 36 comes into contact with the side surface of the lower region of the bottom portion 40 of the inclined groove portions 20a, 20b of the inverted U-shaped recess 20 of the support rod.

Further, since the groove portion 20 of the support rod 12 and the inclination angle α are equal to the inclination angle β of the leg portion 29 of the horizontal rod member 14 and the angle is 10 °, the end side 32 of the rectangular engaging recess 30 is formed. And the horizontal bar 14 engaged in the groove portions 20a, 20b by the engaging action of the cam surface 21 at the upper ends of the groove portions 20a, 20b of the inverted U-shaped recesses 20 of the supporting rod material.
The lifting of the legs 29 of the is prevented.

Such an embodiment replaces the previously known embodiment in which a round connecting rod is passed through a large number of collinear holes of support rods installed in parallel. Reverse U
The depth D of the V-shaped recess 20 and the end side of the rectangular engaging recess 30
Since the height H'of the horizontal bar 14 above 34 is equal, the upper end surface 22 of the horizontal bar and the upper end surface 18 of the support bar become the same surface at each intersection and form a flat surface. Further, an adhesive may be used to bond and fix the bar members in the cross engagement of the laid support bar member 12 and the horizontal bar member 14 in the recess. The lattice 10 can be assembled in a short time without the need for a special tool, and the bars 20 and 30 are mechanically and firmly engaged with each other at the intersecting portion due to the engagement relationship between the recesses 20 and 30 of the bars, thereby increasing the strength. It has an extremely high structure. The leg portion 29 of the horizontal bar member temporarily undergoes mechanical deformation when engaged, and upon completion of the engagement, becomes the original two inclined leg portions 29, and the repulsive force of the leg portion 29 causes the supporting rod member 29 to move. Unwanted detachment of the horizontal bar member 14 from the inverted U-shaped recess 20 is prevented.

The side 32 of the leg 29 of the horizontal bar is the inverted U-shaped recess 20 of the supporting bar.
The leg portion 29 must be deformed in order to be inserted into the inclined groove portions 20a, 20b of the glass rod, which is peculiar to the glass fiber reinforced resin horizontal bar material having an inverted U-shaped cross-sectional shape formed by drawing. Due to the elasticity characteristic, the leg portion 29 is deformed from the state of being inclined by 10 ° with respect to the normal line of the upper end face 22 to the state of being oriented in the normal line direction. Then, as shown in the left side of FIG. 1, once engaged, the horizontal bar member returns to its original shape, so that a so-called clasp fixing action occurs.

As a preferred example of the lattice formed by engaging the glass fiber reinforced lattice rod material by drawing molding, the vertical height of the horizontal rod member 14 is 12.7 mm, the width of the upper end surface is 13.081 mm, the engaging recess is the lateral width. Is 9.398 mm, height is 3.556 mm, and the width of the slanted legs is 3.17 mm
5 mm.

The support bar has a height of 38.1 mm and a thickness of 9.271 mm. The size of the recess of the support bar 12 is the same as the width of the cross section and the thickness of the leg of the inverted U-shaped horizontal bar. Further, the arc connecting the two inclined groove portions is an arc having a radius of 4.7625 mm. The depth of the recess from the upper end surface of the support rod is 8.636 mm, and the cam surfaces 21 formed at the upper ends of the inclined groove portions of the recess form a surface angle of 140 ° with each other. The angle α formed between the inclined groove portions 20a and 20b and the normal line to the upper end surface 18 is equal to the angle β formed by the leg of the horizontal bar 14 having an inverted U-shaped cross section with the normal line to the upper end surface 22 of the horizontal bar. .

The present invention is not limited to the above-described embodiments, and includes a lattice having the above-described structure by variously changing the size, shape, material, etc. within the scope of the technical idea of the present invention.

〔The invention's effect〕

According to the present invention, the recess for engaging the horizontal bar is inserted into the inverted U-shaped recess of the supporting bar, and the leg portion of the horizontal bar is temporarily deformed by the action of the cam surface of the upper end of the inclined groove. After that, the slanted leg portions of the horizontal bar member and the slanted groove portions of the support rod member are completely in contact with each other in the inverted U-shaped recess, so that the horizontal bar member and the support rod member are engaged with each other. It is extremely easy to assemble, and the assembled grid is a careless support for the horizontal bar due to the surface contact resistance between the inclined leg of the horizontal bar and the inclined groove of the support bar and the repulsive force of the leg. Detachment from the material is effectively prevented.

[Brief description of the drawings]

FIG. 1 is a partially exploded perspective view showing an embodiment of a lattice according to the present invention, and FIG. 2 is an enlarged exploded view of the lattice of FIG. 10 …… Lattice, 12 …… Supporting bar, 14 …… Horizontal bar, 16 …… Side, 18 …… Top surface, 19 …… Bottom surface, 20 …… Concave, 20a, 20
b …… groove portion, 21 …… cam surface, 22 …… upper end surface, 24 …… side surface, 26 …… groove portion, 29 …… leg portion, 30 …… engagement concave portion, 32…
… Edge, 34 …… Horizontal edge, 36 …… Side.

Claims (2)

(57) [Claims] 1. A lattice formed by molding a glass fiber reinforced resin, wherein a first rod and a second rod formed by molding the glass fiber reinforced resin are extended and arranged so as to alternate with each other. The first bar is a base support bar having a rectangular cross section, and the support bar has a thickness T and a height H having opposite side surfaces, an upper end surface and a lower end surface, Each support rod is formed with an inverted U-shaped concave portion having a vertical depth D in the axial direction of the upper end surface, and the inverted U-shaped concave portion has a groove portion inclined downward in the opposite direction. The groove portion opens upward and outwardly near the upper end surface of the support bar to form an inclined cam surface, and the upper end of the inclined cam surface has a distance W ″, and the second bar is reinforced with glass fiber. It consists of a self-engagement type horizontal bar that is formed by molding, which has an inverted U-shaped cross section and has a horizontal base and a lower part. It is composed of a pair of legs open to the side, the thickness of the legs is equal to the width of the branched groove of the inverted U-shaped recess of the supporting rod, and the vertical height H ″ of the horizontal rod is Is greater than the vertical depth D of the inverted U-shaped recess of the support rod, and the horizontal rod has a flat upper end surface and a side surface that is inclined and opened outward. A rectangular engaging recess is formed in the axial direction of each leg, the width W'of the engaging recess is equal to the thickness T of the supporting rod, and the height H'is the vertical height of the horizontal rod. Lower than the height H ″, the engaging recesses have vertical side surfaces that are in parallel contact with both side surfaces of the supporting rod, and the rectangular engaging recesses of both legs of the horizontal rod are Has horizontal end faces separated from each other so that the distance between the opposite side faces of the horizontal bar is S,
This distance S is smaller than the distance W ″ between both upper ends of the opposite inclined cam surfaces of the upper ends of the opposite inclined grooves of the inverted U-shaped concave portion of the support rod, and supports the engaging concave portion of the horizontal rod. When it is inserted into the inverted U-shaped recess of the bar, the upper surface of the engaging recess of the leg of the horizontal bar is deformed inward by the engaging action of the cam surface at the upper end of the inclined groove, and this temporary lateral The horizontal bar is inserted into the inverted U-shaped recess of the support bar due to the deformation of the leg of the bar, and the inclined leg of the horizontal bar has the inclined surface of the groove inclined downward to the outside of the support bar. When the lattice is completely assembled, the horizontal bar and the support bar are engaged with each other, and after the grid is assembled, the surface contact resistance between the inclined leg of the horizontal bar and the groove of the support bar and A glass fiber reinforced resin molding grid characterized in that the repulsive force prevents the horizontal bar from detaching from the supporting bar. 2. The vertical height of the engaging recess of the leg of the horizontal bar is determined by the relationship between the overall height of the horizontal bar and the depth of the inverted U-shaped recess of the supporting bar, and 2. The glass according to claim 1, wherein the upper end surface of the horizontal bar and the upper end surface of the support bar are flush with each other when the mechanical engagement between the horizontal bar and the support bar in the combination recess is completed. Fiber-reinforced resin molding grid.