JP2002102294A - Reinforcing structure of bed board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive, lightweight, and durable bed board by reducing the number of part items and the used quantity of resin. SOLUTION: In the bed board 1 formed by blowing, a plurality of projecting beads 17 extending in the longitudinal direction of the board and a plurality of recessed beads 19 protruding on a lower face board part 13 side from a basic part of the projecting bead 17 and extending in the longitudinal direction of the board are provided in an upper face board part 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a reinforcing structure of a floor plate in a bed (care bed) for a sick or elderly person.

[0002]

2. Description of the Related Art Japanese Patent Laid-Open Publication No. 11-155912 (hereinafter referred to as "Conventional Example 1"), Japanese Patent Laid-Open Publication No. 9-299188 (hereinafter referred to as "Conventional Example 2"), and As disclosed in, for example, Japanese Patent No. 2546010 (hereinafter, referred to as “Conventional Example 3”), there is one that is made of resin to reduce the weight.

[0003] The bed floor plate of Conventional Example 1 is injection-molded, and the strength is secured by projecting a plurality of reinforcing ribs on the surface of the upper plate portion.

The bed floor plate of Conventional Example 2 is blow-molded, and a plurality of convex beads are protruded from the surface of the upper plate portion and a metal rod is inserted into the inside to secure the strength. A plurality of ventilation holes are formed through the surface of the face plate to allow moisture to escape.

[0005] The bed floor plate of Conventional Example 3 is also blow-molded, and a plurality of reinforcing ribs are protruded from the surface of the upper plate portion to ensure strength, and the upper plate portion between adjacent reinforcing ribs is also provided. A plurality of ventilation holes are formed through the bottom plate portion to allow moisture to escape.

[0006]

However, in the bed plate of the prior art example 1, although a certain degree of strength can be secured by the reinforcing ribs, in order to obtain more strength, the number of reinforcing ribs must be increased. In addition, the thickness of the bed plate must be increased, which increases the amount of resin used, increases material costs and increases weight.

[0007] The bed floor plate of Conventional Example 2 is reinforced by a convex bead and a metal rod, but the number of parts is increased due to the use of the metal rod, which increases the cost and increases the weight. Further, if there is a vent, the rigidity around the vent tends to decrease.

[0008] In the bed floor plate of Conventional Example 3, as in Conventional Example 1, although a certain degree of strength can be ensured by the reinforcing ribs, in order to obtain more strength, the number of reinforcing ribs must be increased, The bed board must be thicker, which increases the amount of resin used, increasing material costs and increasing weight. Further, similarly to Conventional Example 2,
If there is an air hole, the rigidity around the air hole tends to decrease.

SUMMARY OF THE INVENTION The present invention has been made in view of the foregoing, and an object of the present invention is to provide an inexpensive, lightweight, and durable bed floor board by reducing the number of parts and the amount of resin used. That is.

[0010]

In order to achieve the above-mentioned object, the present invention is characterized by devising the arrangement of beads and ribs, and the structure around the ventilation holes.

Specifically, the present invention has the following solutions.

That is, according to the first aspect of the present invention, a plurality of parallelly extending convex beads and a plurality of parallelly extending concave beads projecting rearward from the base of each convex bead are formed on the upper surface plate. It is characterized by being provided.

According to the above construction, in the first aspect of the present invention, the convex and concave beads projecting to the opposite sides on the upper and lower surfaces of the upper surface plate portion increase the surface rigidity and improve the durability.

[0014] This also eliminates the need to unnecessarily increase the thickness of the bed floor plate or to reinforce it with metal rods in order to increase the strength, thereby reducing the amount of resin used and the number of parts, resulting in light weight and low cost. Bedboard.

[0015] Further, the convex bead prevents the mattress from shifting in the convex bead arrangement direction.

According to a second aspect of the present invention, in the first aspect of the present invention, each concave bead is disposed between adjacent convex beads on the upper surface plate in parallel with the convex bead. .

With the above arrangement, in the second aspect of the invention, the rigidity in the direction orthogonal to the arrangement direction is doubled by the convex beads and the concave beads arranged in the same direction.

The invention according to claim 3 is characterized in that a plurality of parallelly extending convex beads and a plurality of parallelly extending hollow ribs having a hollow portion therein are provided on the upper plate portion. I do.

According to the above construction, the surface bead rigidity is enhanced by the convex bead and the hollow rib, and the durability is improved. In particular, the surface rigidity is dramatically increased by the reinforcing rib having the hollow structure.

[0020] This also eliminates the need to unnecessarily increase the thickness of the bed floor plate or to reinforce it with metal rods in order to increase the strength, and reduces the amount of resin used and the number of parts, thereby reducing the weight and cost. Bedboard.

Further, the convex bead prevents the mattress from shifting in the convex bead arrangement direction.

According to a fourth aspect of the present invention, in the third aspect of the invention, each hollow rib is formed between the adjacent convex beads of the upper surface plate portion so as to protrude to the rear surface side of the upper surface plate portion and is formed with the convex bead. It is characterized by being arranged in parallel.

According to the above construction, in the invention according to the fourth aspect, the surface rigidity is further enhanced by the convex beads and the hollow ribs projecting to the opposite sides on the upper and lower surfaces of the upper surface plate portion and arranged in the same direction. And the durability is further improved.

According to a fifth aspect of the present invention, there is provided a reinforcing structure for a blow-molded bed floor plate, wherein an upper surface plate portion and a lower surface plate portion are brought close to each other and polymerized and melted at an intermediate portion in the thickness direction of the bed floor plate. It is characterized in that a plurality of front and back recessed portions each having a superposed surface portion formed by being attached thereto and a vent formed through a part of the superposed surface portion are provided.

With the above arrangement, in the invention according to the fifth aspect, the upper surface plate portion and the lower surface plate portion come close to each other and are polymerized and fused, so that the polymerized surface portion is formed at the middle portion in the thickness direction of the bed floor plate. On the upper and lower sides of the overlapped surface portion, two front and back concave portions having the overlapped surface portion as a common bottom portion are formed. Therefore, the upper and lower two concave portions are reinforced by the overlapping surface portion, and as a result, the supporting rigidity of the overlapping surface portion is increased.

Further, since the above-mentioned superposed surface portion is formed by the superposition and fusion of the upper surface plate portion and the lower surface plate portion approaching each other as described above, the development amount is smaller than when only one side is brought close. It is reduced by half to achieve a uniform thickness.

Therefore, the ventilation hole is formed on the overlapped surface having a high supporting rigidity and a uniform thickness, so that the rigidity around the ventilation hole is increased.

[0028] This also eliminates the need to unnecessarily increase the thickness of the bed floor plate or to reinforce it with metal rods in order to increase the strength, and reduces the amount of resin used and the number of parts, thereby reducing the weight and cost. Bedboard.

According to a sixth aspect of the present invention, there is provided a reinforcement structure for an injection-molded bed floor plate, wherein the upper surface plate portion has a ventilation hole formed therethrough by a hole peripheral wall protruding to the back side thereof, It is characterized in that a plurality of reinforcing ribs are provided on the rear surface side for integrally connecting the hole peripheral wall and the upper plate portion.

According to the above construction, the peripheral wall of the hole and the upper surface plate are integrally connected by the reinforcing rib, so that the rigidity around the ventilation hole is increased.

[0031] This also eliminates the need to unnecessarily increase the thickness of the bed floor plate or increase the strength of the bed with metal rods in order to increase the strength. Bedboard.

[0032]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIGS. 1 to 3 show a bed floor plate 1 to which a reinforcing structure according to Embodiment 1 of the present invention is applied. Here, the bed floor plate 1 is a flip-up bed (care bed). This is the case where the floorboard is a floorboard. This bed floor plate 1
It is an integral resin product integrally formed by blow molding, and is configured to be bent at four locations in the longitudinal direction of the floorboard.

The bed floor plate 1 has five floor plate portions 5A, 5B, 5C, 5C in order from the left side in FIG.
5D, 5E, and each floor panel 5A, 5B, 5
Five hollow portions 7A, 7B, 7 independent of C, 5D, 5E
C, 7D and 7E are formed.

At each of the bent portions 3, three hollow reinforcing ribs 9 extending in the width direction of the floor plate project from the back side of the bed floor plate 1, and are formed on both sides of each hollow reinforcing rib 9 in the width direction of the floor plate. The floor hinges 5A, 5B, 5
C, 5D and 5E are bent.

The bed plate 1 (floor plates 5A, 5B, 5)
C, 5D, 5E), the upper plate 11 on which the mattress is placed, the lower plate 13 on the side supported by the bed frame, and the upper plate 11 and the lower plate 13 in the circumferential direction. And a side plate 15 that is integrally connected.

As a feature of the first embodiment, as shown in FIG. 1 as a representative example of the floor plate portion 5E,
In FIG. 1, a plurality of convex beads 17 extending in the longitudinal direction of the floor plate are projected in parallel, and two or three concave beads extending in the longitudinal direction of the floor plate are provided between adjacent convex beads 17 of the upper surface plate portion 11. 19 is parallel to the convex bead 17 and the convex bead 1
7 are arranged so as to protrude from the base portion 7 toward the lower surface plate portion 13 which is the back surface side.

The bed floorboard 1 configured as described above can raise the floorboard 5A at the left end of FIG. 3 from the laid-down state of the virtual line to the upright state of the solid line in response to a user's request. A foot-raising operation or the like is performed to raise the right end floor plate portion 5E and the floor plate portion 5D adjacent to the left end from the laid-down state of the solid line to the upright state of the virtual line.

As described above, in the bed floor plate 1 of the first embodiment, the convex bead 17 and the concave bead 19 project from the upper and lower surfaces of the upper surface plate 11 toward opposite sides, respectively. Can be reinforced from both upper and lower sides to increase the surface rigidity and improve the durability. Therefore, it is not necessary to increase the thickness of the bed floor plate 1 more than necessary in order to increase the strength, and it is not necessary to reinforce the bed floor plate with a metal bar. 1 can be provided.

Further, since the concave beads 19 are arranged between the convex beads 17 extending in the longitudinal direction of the floor plate adjacent to the upper surface plate portion 11 in parallel with the convex beads 17, the convex beads 17 and the concave beads 17 arranged in the same direction are arranged. With the bead 19, the rigidity in the floorboard longitudinal direction can be doubled.

The mat bead 17 can prevent the mattress from shifting in the width direction of the floorboard, which is the arrangement direction thereof.

The number of the convex beads 17, the number of the concave beads 19, the number of the bent portions 3, and the number of the hollow reinforcing ribs 9 are not limited to the above-described first embodiment, but can be appropriately increased or decreased. . Further, the orientation of the convex bead 17 and the concave bead 19 may be set in the width direction of the floorboard, or they may cross each other.

(Embodiment 2) FIGS. 4 to 6 show a bed floor plate 1 to which a reinforcing structure according to Embodiment 2 of the present invention is applied. In this embodiment, the bed floor plate 1 is an upright bed (care bed). This is the case where the floorboard is a floorboard. This bed floor plate 1
Unlike the first embodiment, it is made of resin molded by injection molding. In this example, the divided floorboards 4A, 4C, and 4E are connected in order from the left in FIG. 6, and each of the divided floorboards 4A, 4C, and 4E is connected to two adjacent connecting portions. , So that they can be bent freely.

In FIG. 6, the left and right end divided floorboards 4A and 4E are shown.
A bent portion 3 is formed on the inner side of the slab, and a bellows-like hinge 21 extending in the width direction of the floor plate is formed integrally with the bent portion 3.
B, 4D, and the outer portions are floor plate portions 4F, 4G. In FIG. 6, floor plate portions 4B and 4D constituting part of the left and right end divided floor plates 4A and 4E and a central divided floor plate 4C are rotatably connected by hinges 23. Thus, the bed floor plate 1 according to the second embodiment, which can be bent at four positions in the longitudinal direction of the floor plate, is configured.

The above-mentioned bed plate 1 (divided floor plates 4A, 4C,
4E) includes an upper surface plate portion 11 on which the mattress is placed, and a side surface plate portion 15 extending downward from the periphery of the upper surface plate portion 11. A hollow portion 15a is formed in the side plate portion 15.

As a feature of the second embodiment, as shown in FIG. 4, a floor plate portion 4G of a divided floor plate 4E is exemplified.
A plurality of convex beads 17 extending in the longitudinal direction of the floor plate are provided in the upper surface plate portion 11 in parallel, and a hollow portion 25a extending in the longitudinal direction of the floor plate is provided between adjacent convex beads 17 of the upper surface plate portion 11. The hollow rib 25 provided inside is arranged so as to protrude to the back side of the upper plate portion 11 and in parallel with the convex bead 17. The hollow portion 25a of the hollow rib 25 is formed together with the hollow portion 15a of the side plate portion 15 by injecting an inert gas such as nitrogen gas during injection molding of the bed floor plate 1. Injection molding is a molding method called hollow injection molding (gas injection).

The bed plate 1 constructed as described above is provided on the floor plate portion 4 of the divided floor plate 4A at the left end in FIG.
F is raised from the laid-down state of the virtual line to the upright state of the solid line, and the floor plate portion 4G of the divided floor plate 4E at the right end of FIG. A foot-raising operation or the like for raising the user to a standing state is performed.

As described above, in the bed plate 1 of the second embodiment, the convex bead 17 and the hollow rib 25
Are formed, the surface rigidity can be increased by reinforcing them, and the durability can be improved. In particular, since the hollow rib 25 has a hollow structure, the surface rigidity can be dramatically increased.

In addition, since the convex bead 17 and the hollow rib 25 protrude from the upper and lower surfaces of the upper surface plate 11 toward opposite sides, the upper surface plate 11 is reinforced from both upper and lower sides to further increase the surface rigidity. And the durability can be further improved. Therefore, it is not necessary to increase the thickness of the bed floor plate 1 more than necessary in order to increase the strength, and it is not necessary to reinforce the bed floor plate with a metal bar. 1 can be provided.

Furthermore, since the hollow ribs 25 are arranged between the adjacent convex beads 17 of the upper surface plate portion 11 and in parallel with the convex beads 17 extending in the longitudinal direction of the floor plate, the hollow ribs 25 and the convex beads 17 arranged in the same direction are hollow. The ribs 25 can double the rigidity in the longitudinal direction of the floorboard.

The convex bead 17 can prevent the mattress from being displaced in the width direction of the floorboard, which is the arrangement direction.

The number of the convex beads 17, the number of the hollow ribs 25, and the number of the bent portions 3 are not limited to the above-described second embodiment, but can be appropriately increased or decreased. Furthermore, the orientation of the convex bead 17 and the hollow rib 25 may be set in the width direction of the floorboard, or they may cross each other.

(Embodiment 3) FIGS. 7 to 9 show a bed floor plate 1 to which a reinforcing structure according to Embodiment 3 of the present invention is applied. Here, the bed floor plate 1 is a falling-down bed (care bed). This is the case where the floorboard is a floorboard. This bed floor plate 1
Similar to the first embodiment, it is made of resin molded by blow molding. Further, in this example, the divided floorboards 6A, 6B, 6C, 6D, and 6E are divided by hinges 23 in order from the left in FIG. Reference numerals 6D and 6E denote four adjacent connecting portions, which are configured to be freely bendable with each other, and the bed floor plate 1 according to the third embodiment. These split floor boards 6A, 6
B, 6C, 6D, 6E also have five hollow portions 7A, 7B, 7
C, 7D and 7E are formed.

The above-mentioned bed plate 1 (divided floor plates 6A, 6B,
6C, 6D, 6E), the upper plate 11 on which the mattress is placed, the lower plate 13 on the side supported by the bed frame, and the upper plate 11 and the lower plate 13 in the circumferential direction. And a side plate 15 that is integrally connected.

As a feature of the third embodiment, FIG.
As illustrated in FIGS. 7A and 7B, the divided floor boards 6A, 6B, 6C, 6D, and 6E are provided with the upper board section 11 and the lower board section 13 approaching each other. 1, a rectangular or elliptical overlapping surface portion 27 formed by fusion-bonding at an intermediate portion in the plate thickness direction is disposed at a plurality of locations, and the overlapping surface portion 27 is located between the upper surface plate portion 11 and the lower surface plate portion 13. To be longer in the longitudinal direction of the floorboard,
The plate thickness is slightly larger than the plate thickness of the upper plate portion 11 and the lower plate portion 13.

On the upper and lower sides of the overlapping surface portion 27, rectangular or elliptical front and back concave portions 28 are formed back-to-back, and the upper and lower two front and rear concave portions 28 are formed by the upper surface plate portion 11 and the lower surface plate portion 13 mutually. They are formed by approaching each other, and the bottom portions are shared with each other, and this bottom portion is used as the overlapped surface portion 27.

Then, instead of penetrating a part of the overlapping surface portion 27, that is, the entire overlapping surface portion 27,
Except for a part thereof, two vent holes 29 for dissipating moisture are formed through at intervals. The vent hole 29 is formed through a drill or the like after molding.

The bed floor panel 1 constructed as described above can be used to raise the divided floor panel 6A at the left end of FIG. 9 from the laid-down state of the virtual line to the upright state of the solid line in response to the user's request. A foot lifting operation or the like is performed to raise the rightmost divided floor panel 6E and the left divided floor panel 6D from the solid line falling state to the virtual line standing state.

As described above, in the bed floor plate 1 of the third embodiment, the upper surface plate portion 11 and the lower surface plate portion 13 are brought close to each other and polymerized and fused at the middle portion of the bed floor plate 1 in the thickness direction. Since the upper and lower two concave portions 28 are formed, and the overlapping surface portion 27 is formed by the bottom surface of the concave portion 28, the upper and lower two front and rear concave portions 28 are reinforced by the overlapping surface portion 27. As a result, the overlapping surface portion 27 is formed. Support rigidity can be improved.

Further, as described above, since the upper surface plate portion 11 and the lower surface plate portion 13 are brought close to each other and polymerized and fused to form the overlapped surface portion 27, compared with the case where only one side is approached. The amount of development can be greatly reduced to form the overlapped surface portion 27 having a uniform thickness, and the ventilation hole 29 is formed in the overlapped surface portion 27 having a high support rigidity and a uniform thickness. The surrounding rigidity can be increased.

[0061] This also eliminates the need to unnecessarily increase the thickness of the bed floor plate 1 or to reinforce it with metal rods in order to increase the strength, thereby reducing the amount of resin used and the number of parts. It is possible to provide a lightweight and inexpensive bed floor plate 1.

The number of the overlapping surface portions 27, the number of the vent holes 29, and the number of the bent portions 3 are not limited to those in the third embodiment described above, but can be appropriately increased or decreased.

(Embodiment 4) FIGS. 10 to 12 show a bed floor plate 1 to which a reinforcing structure according to Embodiment 4 of the present invention is applied. Here, the bed floor plate 1 is an up-down bed (care bed). This is the case where the floorboard is a floorboard. This bed floor board 1
Is made of resin molded by injection molding as in the second embodiment. In this example, as in Embodiment 3, five divided floor boards 6A, 6A are sequentially arranged from the left in FIG.
B, 6C, 6D, and 6E are connected to each other by hinges 23, and each of the divided floor boards 6A, 6B, 6C, 6
D and 6E are configured to be freely bendable at four adjacent connecting portions, and the bed floor plate 1 of the fourth embodiment is configured.

The above-mentioned bed plate 1 (divided floor plates 6A, 6B,
6C, 6D, and 6E) include an upper surface plate portion 11 on which a mattress is placed, and a side surface plate portion 15 extending downward from a peripheral edge of the upper surface plate portion 11.

As a feature of the fourth embodiment, FIG.
(A) and (b), as exemplified by the divided floor plate 6A, a plurality of portions of the divided floor plates 6A, 6B, 6C, 6D, and 6E are provided with a hole peripheral wall 31 protruding to the back side for air dissipation. A rectangular or elliptical ventilation hole 33 is formed to penetrate, and the ventilation hole 33 is positioned to be longer in the longitudinal direction of the floorboard. Adjacent air holes 33 are connected by reinforcing ribs 35. The reinforcing rib 35 integrally connects the hole peripheral wall 31 and the upper surface plate 11 on the back surface side of the upper surface plate 11.

The bed floor panel 1 configured as described above can be used to raise the divided floor panel 6A at the left end of FIG. 12 from the laid-down state of the imaginary line to the upright state of the solid line in response to a user's request. A foot lifting operation or the like is performed to raise the rightmost divided floor panel 6E and the floor panel section 6D adjacent to the left side from the laid-down state of the solid line to the upright state of the virtual line.

As described above, in the bed plate 1 of the fourth embodiment, the ventilation hole 33 is formed through the upper surface plate portion 11 by the hole peripheral wall 31 projecting to the rear surface side.
On the back side, the hole peripheral wall 31 and the upper surface plate 11
5, the rigidity around the ventilation hole 33 can be increased by the sense of unity of the hole peripheral wall 31, the upper surface plate portion 11, and the reinforcing rib 35.

In addition, it is not necessary to increase the thickness of the bed plate 1 unnecessarily to increase the strength or to reinforce it with a metal bar, thereby reducing the amount of resin used and the number of parts. It is possible to provide a lightweight and inexpensive bed floor plate 1.

The number of the vent holes 33 and the number of the bent portions 3 are not limited to those in the above-described fourth embodiment, but can be appropriately increased or decreased.

Further, in the first and second embodiments, the front and back recessed portions 28 having the ventilation holes 29 of the third embodiment and the ventilation holes 33 of the fourth embodiment are not provided. Although the convex bead 17, the concave bead 19 and the hollow rib 25 of the first and second embodiments are not provided, it is also possible to combine both.

Further, the present invention can be applied not only to the bed plate 1 for an upright bed, but also to a bed having no bent portion 3.

[0072]

As described above, according to the first aspect of the present invention, since the convex bead and the concave bead project from the upper surface plate in opposite directions, the upper surface plate is reinforced from both sides. As a result, the surface rigidity can be increased and the durability can be improved. Also, there is no need to increase the thickness of the bed floorboard more than necessary to increase the strength or to reinforce it with metal rods, and it is possible to provide a lightweight and inexpensive floorboard by reducing the amount of resin used and the number of parts. it can.

According to the second aspect of the present invention, since the concave beads are arranged in parallel with the convex beads between the adjacent convex beads on the upper surface plate portion, rigidity in a direction orthogonal to the arrangement direction can be secured.

According to the third aspect of the present invention, since the convex bead and the hollow rib are provided on the upper surface plate portion, the surface rigidity can be increased by both, and the durability can be improved. In particular, the surface rigidity can be dramatically increased by the hollow rib structure.
Also, there is no need to increase the thickness of the bed floorboard more than necessary to increase the strength or to reinforce it with metal rods, and it is possible to provide a lightweight and inexpensive floorboard by reducing the amount of resin used and the number of parts. it can.

According to the fourth aspect of the present invention, the hollow ribs are arranged between the adjacent convex beads of the upper surface plate so as to protrude to the rear side of the upper surface plate and in parallel with the convex beads. The convex bead and the hollow rib projecting to the opposite sides on both surfaces can further increase the surface rigidity and further improve the durability.

According to the fifth aspect of the present invention, the upper surface plate portion and the lower surface plate portion are brought closer to each other and polymerized and fused at an intermediate portion in the plate thickness direction of the bed floor plate, so that the common bottom portion of the front and back concave portions is formed. Since the overlapping surface portion is formed and the ventilation hole is formed to penetrate a part of the overlapping surface portion, the rigidity around the ventilation hole can be increased by the overlapping surface portion having high support rigidity and uniform thickness. Also, there is no need to increase the thickness of the bed floorboard more than necessary to increase the strength or to reinforce it with metal rods, and it is possible to provide a lightweight and inexpensive floorboard by reducing the amount of resin used and the number of parts. it can.

According to the sixth aspect of the present invention, a ventilation hole is formed through the upper surface plate portion by a hole peripheral wall protruding to the rear surface side, and the hole peripheral wall and the upper surface plate portion are reinforced on the rear surface side of the upper surface plate portion. Since the ribs are integrally connected, the rigidity around the ventilation holes can be increased by the sense of unity of the hole peripheral wall, the top plate, and the reinforcing ribs. Also, there is no need to increase the thickness of the bed floor plate more than necessary to increase the strength or to reinforce it with metal rods,
A lightweight and inexpensive floorboard can be provided by reducing the amount of resin used and the number of parts.

[Brief description of the drawings]

FIG. 1 is a diagram showing a part of a cross section taken along line AA of FIG. 2;

FIG. 2 is a perspective view of a bed plate to which the reinforcing structure according to Embodiment 1 of the present invention is applied.

FIG. 3 is a sectional view taken along line BB of FIG. 2;

FIG. 4 is a diagram showing a part of a cross section taken along line CC of FIG. 5;

FIG. 5 is a perspective view of a bed floor plate to which a reinforcing structure according to Embodiment 2 of the present invention is applied.

FIG. 6 is a sectional view taken along line DD of FIG. 5;

FIG. 7A is a sectional view taken along line EE of FIG.
FIG. 9B is an enlarged view of a portion F in FIG.

FIG. 8 is a perspective view of a bed plate to which a reinforcing structure according to Embodiment 3 of the present invention is applied.

FIG. 9 is a sectional view taken along line GG of FIG. 8;

10A is a sectional view taken along line HH in FIG.
FIG. 12B is an enlarged view of a portion I in FIG. 11.

FIG. 11 is a perspective view of a bed plate to which a reinforcing structure according to Embodiment 4 of the present invention is applied.

FIG. 12 is a sectional view taken along line JJ of FIG. 11;

[Explanation of symbols]

 1 Bed floor plate 11 Upper surface plate 13 Lower surface plate 17 Convex bead 19 Concave bead 25 Hollow rib 25a Hollow part 27 Overlapping surface part 28 Depressed part 29,33 Vent hole 31 Peripheral wall 35 Reinforcing rib

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Kunihiko Takeshige, Inventor Nishikawa Kasei Co., Ltd., 2-25-31 Kabe Minami, Hiroshima City 2-25-25 Minami Nishikawa Chemical Co., Ltd. F-term (reference) 4C040 AA30 CC10

Claims (6)

[Claims] 1. A top plate portion having a plurality of parallelly extending convex beads and a plurality of parallelly extending concave beads projecting from the base of each convex bead to the rear surface side. Reinforced structure of bed floor. 2. The bed floor board reinforcing structure according to claim 1, wherein each of the concave beads is arranged between the adjacent convex beads of the upper surface plate portion in parallel with the convex beads. Construction. 3. A bed floor board reinforcing structure, wherein a plurality of parallelly extending convex beads and a plurality of parallelly extending hollow ribs having a hollow portion therein are provided on an upper surface plate portion. 4. The reinforcing structure for a bed floor plate according to claim 3, wherein each hollow rib is arranged between the adjacent convex beads of the upper surface plate portion so as to protrude toward the rear surface of the upper surface plate portion and in parallel with the convex beads. A bed floor slab reinforcement structure. 5. A reinforcing structure for a blow-molded bed floor plate, which is formed by bringing an upper surface plate portion and a lower surface plate portion close to each other and polymerizing and fusion-bonding them at an intermediate portion in the thickness direction of the bed floor plate. A reinforcing structure for a bed floor plate, comprising a plurality of concave portions on the front and back sides each having a superposed surface portion and a vent formed through a part of the superposed surface portion. 6. A reinforcing structure for an injection-molded bed floor plate, wherein the upper surface plate portion has a ventilation hole formed therethrough by a hole peripheral wall protruding to the rear surface side thereof; A reinforcing structure for a bed floor plate, comprising a plurality of reinforcing ribs for integrally connecting the upper plate unit and the upper plate unit.