JP3227995U - Yokoneta for freight car carrier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a Yokoneta which stops the growth of cracks starting from a fastener even when a fastener such as a nail is driven into a Yokoneta for a cargo vehicle carrier. SOLUTION: The horizontal root thickness 1 extends in the width direction of the freight vehicle, supports the floor plate of the loading platform of the freight vehicle from below, and is made of an aggregate, and the aggregate is continuous in the length direction of the freight vehicle. The laminas 20A, 10 and 20B are provided, and the laminas 20A, 10 and 20B are made of bamboo, and the bamboo fiber direction of the intermediate lamina 10 among these laminas 20A, 10 and 20B is the vehicle height direction. The bamboo fiber direction of the laminars 20A and 20B sandwiching the intermediate laminar 10 is the vehicle width direction. [Selection diagram] Fig. 2

Description

The present invention relates to Yokoneta, which supports the floorboard of a cargo bed of a freight vehicle.

Yokoneta in a freight vehicle is a wooden square bar that is placed in the vehicle width direction under the floor plate for the loading platform. The horizontal joists are placed on the chassis between the vertical joists extending in the vehicle length direction and the floor board, and are fixed by driving fasteners such as nails. In the field of construction, bamboo joists that are easily available and inexpensive have been developed. For example, Patent Document 1 discloses a technique of using bamboo laminated lumber made of laminated bamboo as a joist.

Japanese Unexamined Patent Publication No. 10-131933

Even in freight vehicles, replacing wood with bamboo can contribute to cost reduction and weight reduction. However, since cracks tend to develop in the fiber direction of bamboo, when a fastener is driven into the loading platform floor plate and the horizontal root thickness in order to fix the loading platform floor plate to the horizontal root thickness, the horizontal root thickness is cracked and divided.

Therefore, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a bubo for a freight vehicle carrier in which cracks do not develop even when a fastener such as a nail is driven.

In order to solve the above problems, it extends in the width direction of the freight vehicle, supports the floor plate of the loading platform of the freight vehicle from below, and is a horizontal root made of an aggregate, and the aggregate is the vehicle. A plurality of three or more laminas laminated in the first direction orthogonal to the width direction are provided, and among the plurality of laminas, the three layers of lamina laminated continuously are made of bamboo, and among these three layers of lamina. The bamboo fiber direction of the intermediate lamina is the second direction orthogonal to both the vehicle width direction and the first direction, and the bamboo fiber direction of the lamina sandwiching the intermediate lamina is the vehicle width direction.

Preferably, the first direction is the vehicle length direction and the second direction is the vehicle height direction.

Preferably, the first direction is the vehicle height direction and the second direction is the vehicle length direction.

Preferably, the total number of the plurality of laminas is an odd number of 3 or more, all of the plurality of laminas are made of bamboo, and the central lamina is the first of the plurality of laminas, and the central lamina is the first to the first. The bamboo fiber direction of the odd-numbered lamina counting in the direction is the second direction, and the bamboo fiber direction of the even-numbered lamina counting in the first direction from the central lamina of the plurality of laminas is the vehicle width direction. is there.

Preferably, the odd-numbered lamina is formed by assembling a plurality of bamboo laths having a unified fiber direction in the second direction, and the even-numbered lamina has a plurality of bamboo laths having a unified fiber direction in the vehicle width direction. Bamboo lath is assembled.

Preferably, when n is a natural number, the total number of the plurality of laminas is 4n-1.

According to the embodiment of the present invention, even if the fastener is driven into the horizontal root, the growth of the crack starting from the fastener stops at the boundary surface of the lamina. Therefore, cracking of the horizontal root can be prevented.

It is a perspective view of the loading platform 100 of a freight vehicle. It is a perspective view of Bubo 1 having a three-layer structure. It is a front view of Bubo Bubo 1. It is a side view of Bubo Bubo 1. It is a top view of Bubo Bubo 1. It is a perspective view of Bubo 1A having a five-layer structure. It is a perspective view of the 7-layer structure bubo 1B. It is a perspective view of the three-layer structure bubo 1C. It is a perspective view of Bubo 1D having a five-layer structure. It is a perspective view of the 7-layer structure bubo 1E.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, although the embodiments described below are provided with various technically preferable limitations for carrying out the present invention, the scope of the present invention is not limited to the following embodiments and illustrated examples.

<< First Embodiment >>
FIG. 1 is a perspective view of a cargo bed 100 of a freight vehicle. The loading platform 100 is mounted on the chassis 110 extending in the vehicle length direction. The loading platform 100 includes a guard frame 101, a pair of vertical joists 102, a plurality of horizontal joists 1, a floor frame 104, and a floor plate 120. The guard frame 101 is erected on the chassis 110 and is provided along the rear surface of the cab of the vehicle. The vertical joists 102 extend in the vehicle length direction and are mounted on the chassis 110. The horizontal joists 1 extend in the vehicle width direction so as to be orthogonal to the vertical joists 102, and are attached on the vertical joists 102 by fasteners such as nails at predetermined intervals in the vehicle length direction. A rectangular floor board 120 is laid on these horizontal roots 1. A floor frame 104 is provided on the outer edge of the floor plate 120, and the outer edge of the floor plate 120 is protected by the floor frame 104. The vehicle length direction refers to the front-rear direction of the freight vehicle, and the vehicle width direction refers to the left-right direction of the freight vehicle.

Hereinafter, the Bubo Bubo 1 will be described in detail with reference to FIGS. 2 to 5. Here, FIG. 2 is a perspective view of the horizontal root thickness 1, FIG. 3 is a front view of the horizontal root thickness 1, FIG. 4 is a side view of the horizontal root thickness 1, and FIG. 5 is a top view of the horizontal root thickness 1. ..

Yokoneta 1 is made of bamboo laminated wood having a square bar shape and a three-layer structure, and the bamboo laminated wood has laminas 20A, 10 and 20B laminated continuously from the front to the back of the freight vehicle. That is, the lamina 10 of the intermediate layer is sandwiched between the lamina 20A of the front layer and the lamina 20B of the rearmost layer, and these laminas 20A, 10, 20B are crimped and hardened by an adhesive. ..

Lamina 20B is made by assembling and hardening a large number of strip-shaped bamboo laths 21B with an adhesive. Specifically, the layer 22B is formed by connecting a plurality of solid bamboo laths 21B in series in the vehicle width direction, and the lamina 20B is formed by stacking the layers 22B in the vehicle height direction. The bamboo fiber direction of these bamboo laths 21B is unified in the vehicle width direction, and the bamboo fiber direction of the lamina 20B is the vehicle width direction. The layer 22B may be made of an integral solid bamboo lath 21B.

Like the Lamina 20B, the Lamina 20A is made by assembling and hardening a large number of strip-shaped bamboo laths 21A with an adhesive. Specifically, the layer 22A is formed by arranging a plurality of solid bamboo laths 21A in series in the vehicle width direction, and the lamina 20A is formed by stacking the layers 22A in the vehicle height direction. The fiber direction of these bamboo laths 21A is unified in the vehicle width direction, and the bamboo fiber direction of the lamina 20A is the vehicle width direction. The layer 22A may be made of an integral solid bamboo lath 21A.

The lamina 10 is made by assembling and hardening a large number of strip-shaped bamboo laths 11 with an adhesive. Specifically, one solid bamboo lath 11 constitutes the layer 12, or a plurality of solid bamboo laths 11 (two in FIG. 2) are arranged in series in the vehicle height direction to form the layer 12. Is configured, and these layers 12 are laminated in the vehicle width direction to form the lamina 10. The bamboo fiber direction of these bamboo laths 11 is unified in the vehicle height direction, and the bamboo fiber direction of the lamina 10 is the vehicle height direction.

The types of bamboo of bamboo lath 11,21A, 21B include, for example, Moso bamboo, tiger spotted bamboo, light bamboo, matake, turtle bamboo, cloth bag bamboo, black bamboo, 篶 bamboo, drawing bamboo, sesame bamboo, crest bamboo, soot bamboo, Horai bamboo, Kusunoki bamboo and the like can be mentioned. Bamboo laths 11,21A and 21B are obtained by cutting bamboo into strips.

When installing the floor plate 120 on the horizontal root thickness 1, a driving type fastener such as a nail, a stud, or a stud is driven into the floor plate 120 and the horizontal root thickness 1 from the upper surface of the floor plate 120 to make the floor plate 120 into the horizontal root thickness 1. Fix it. In general, the place where the fastener is driven is centered in the width direction of the horizontal root thickness 1, and therefore the fastener is driven into the bamboo lath 11 of the lamina 10 of the horizontal root thickness 1. When the fastener reaches the bamboo lath 11 of the lamina 10, cracks grow from the fastener in the direction orthogonal to the fiber direction, that is, in the vehicle length direction and the vehicle width direction, and the cracks grow in the adjacent layer 12. It stops at the interface with the bamboo lath 11 or the laminas 20A and 20B. Therefore, even if the driving tool is driven into the horizontal root thickness 1, the horizontal root thickness 1 is not broken and divided.
Further, since the bamboo fiber directions of the laminas 20A and 20B are in the vehicle width direction, the shear strength and bending strength of the horizontal root thickness 1 when a vertical load is applied to the horizontal root thickness 1 are high.

Comparing the specific gravities of wood and bamboo, which are conventional materials used for the loading platform of a freight vehicle, the specific gravity of wood is 0.75 and that of bamboo is 0.68. Therefore, the Yokoneta 1 is lightweight, and the Yokoneta 1 can contribute to the weight reduction of the freight vehicle. Bamboo has a lower specific gravity than wood, has high strength in the fiber direction, and is more supple, so that the horizontal root thickness 1 has high strength. Bamboo grows faster than trees, and bamboo is cheaper than wood, so Yokoneta 1 is low-priced and suitable for mass production. Since the wood is replaced with bamboo by the use of Yokoneta 1, the consumption of wood and deforestation are suppressed, and Yokoneta 1 contributes to the reduction of the environmental load on the earth. This Yokoneta 1 is kind to the global environment because bamboo grows quickly even without fertilizer.

<< Second Embodiment >>
FIG. 6 is a perspective view of Bubo 1A of the second embodiment.
This Yokoneta 1A is also made of square bar-shaped bamboo laminated wood, and the bamboo laminated wood has laminas 30A, 20A, 10, 20B, and 30B laminated in order from the front to the back of the freight vehicle. The central lamina 10 is the first, and the first and third laminas 10, 30A, and 30B counted in the front-rear direction from the central lamina 10 are provided in the same manner as the lamina 10 of the horizontal root thickness 1 of the first embodiment. , The bamboo fiber direction of these laminas 10, 30A and 30B is the vehicle height direction. The second laminas 20A and 20B counted in the front-rear direction from the central lamina 10 are provided in the same manner as the laminas 20A and 20B of the horizontal root thickness 1 of the first embodiment, and the bamboo fiber direction of these laminas 20A and 20B is a car. It is in the width direction.

<< Third Embodiment >>
FIG. 7 is a perspective view of Bubo 1B of the third embodiment.
This Yokoneta 1B is also made of square bar-shaped bamboo laminated wood, and the bamboo laminated wood is made of laminated lamina 40A, 30A, 20A, 10, 20B, 30B, 40B in order from the front to the back of the freight car. Have. The central lamina 10 is the first, and the first and third laminas 10, 30A, and 30B counted in the front-rear direction from the central lamina 10 are provided in the same manner as the lamina 10 of the horizontal root thickness 1 of the first embodiment. , The bamboo fiber direction of these laminas 10, 30A and 30B is the vehicle height direction. The second and fourth laminas 20A, 20B, 40A, and 40B counted in the front-rear direction from the central lamina 10 are provided in the same manner as the lamina 20A, 20B of the horizontal root thickness 1 of the first embodiment, and these laminas 20A, The bamboo fiber directions of 20B, 40A, and 40B are the vehicle width directions.

<< Modification example >>
The mode for carrying out the present invention has been described above. The above embodiment is for facilitating the understanding of the present invention, and is not for limiting and interpreting the present invention. Further, the embodiment of the present invention can be changed or improved without deviating from the gist of the present invention, and the present invention also includes an equivalent thereof. The changes from the above embodiments will be described below. Each of the changes described below may be applied in combination.

(1) In the above description, examples of horizontal root thicknesses 1, 1A and 1B having a three-layer, five-layer or seven-layer structure have been given, but the total number of horizontal root thickness raminas to which the present invention is applied may be further increased. .. Even if the total number of laminas exceeds 7, the total number of laminas stacked in the vehicle length direction is an odd number of 3 or more, the bamboo fiber direction of the central lamina is the vehicle height direction, and the central lamina is the first. The odd-numbered Lamina bamboo fiber direction counting from the center Lamina in the vehicle length direction is the vehicle height direction, and the even-numbered Lamina bamboo fiber direction counting from the center Lamina in the vehicle length direction is the vehicle width direction. is there. Assuming that n is a natural number and the total number of laminas is 4n-1, the bamboo fiber direction of the laminas at the ends is the vehicle width direction, so that the resistance of the horizontal root thickness to shearing and bending is high. With such a configuration, even if the fastener is driven into the central lamina, the bubo is not broken and divided. That is, since there is a high probability that the fastener is driven into the central lamina, it is possible to suppress the occurrence of long cracks or cracks in the horizontal roots due to the driving of the fastener.

(2) The total number of laminas stacked in the vehicle length direction may be an even number of 4 or more, but in this case, the lamina with the bamboo fiber direction in the vehicle height direction and the bamboo fiber direction in the vehicle width direction. The lamina and the lamina are alternately laminated in the direction of the vehicle length.

(3) Any of the laminas stacked in the vehicle length direction may be made of wood, for example, instead of bamboo. Even in this case, the three layers of lamina that are continuously laminated out of all the laminas are made of bamboo, and the bamboo fiber direction of the middle lamina among these three layers of lamina is the vehicle height direction, sandwiching the middle lamina. Lamina's bamboo fiber direction is the vehicle width direction.

(4) In the first to third embodiments and the modified examples (1) to (3), the lamina of Yokoneta were laminated in the vehicle length direction. On the other hand, by rotating the horizontal root thickness in the first to third embodiments and the modified examples (1) to (3) by 90 degrees around the axis in the vehicle width direction, the lamina stacking direction is in the vehicle height direction. May be. For example:

FIG. 8 is a perspective view of Yokoneta 1C in which three layers of lamina are laminated in the vehicle height direction.
The horizontal root thickness 1C is obtained by rotating the horizontal root thickness 1 of the first embodiment by 90 degrees around an axis in the vehicle width direction. Therefore, in this Yokoneta 1C, the laminas 20A, 10, and 20B are continuously laminated from the top to the bottom of the freight vehicle. The raminas 20A, 10 and 20B of the horizontal root thickness 1C are provided in the same manner as the laminars 20A, 10 and 20B of the horizontal root thickness 1 respectively. The bamboo fiber direction of the bamboo lath 11 of the lamina 10 of Yokoneta 1C is unified in the vehicle length direction, and the bamboo fiber direction of the lamina 10 is the vehicle length direction. The bamboo fiber directions of the bamboo laths 21A and 21B of the Yokoneta 1C Lamina 20A and 20B are unified in the vehicle width direction, and the bamboo fiber directions of these Lamina 20A and 20B are the vehicle width direction.

FIG. 9 is a perspective view of Bubo 1D in which five layers of lamina are laminated in the vehicle height direction.
The horizontal root thickness 1D is obtained by rotating the horizontal root thickness 1A of the second embodiment by 90 degrees around an axis in the vehicle width direction. Therefore, in this Yokoneta 1D, the laminas 30A, 20A, 10, 20B, and 30B are stacked in order from the top to the bottom of the freight vehicle. The raminas 30A, 20A, 10, 20B, and 30B of the horizontal root thickness 1D are provided in the same manner as the laminas 30A, 20A, 10, 20B, and 30B of the horizontal root thickness 1A, respectively. The bamboo fiber directions of the bamboo laths of the lamina 10, 30A, 30B of Yokoneta 1D are unified in the vehicle length direction, and the bamboo fiber directions of these lamina 10, 30A, 30B are the vehicle length direction. The bamboo fiber directions of the bamboo laths of the horizontal roots 1D Lamina 20A and 20B are unified in the vehicle width direction, and the bamboo fiber directions of these Lamina 20A and 20B are the vehicle width direction.

FIG. 10 is a perspective view of Yokoneta 1E in which seven layers of lamina are laminated in the vehicle height direction.
The horizontal root thickness 1E is obtained by rotating the horizontal root thickness 1B of the third embodiment by 90 degrees around an axis in the vehicle width direction. Therefore, the laminas 40A, 30A, 20A, 10, 20B, 30B, and 40B of the Yokoneta 1E are stacked in order from the top to the bottom of the freight vehicle. The raminas 40A, 30A, 20A, 10, 20B, 30B, and 40B of the horizontal root thickness 1E are provided in the same manner as the laminas 40A, 30A, 20A, 10, 20B, 30B, and 40B of the horizontal root thickness 1A, respectively. The bamboo fiber directions of the lamina 10, 30A, 30B of Yokoneta 1E are unified in the vehicle length direction, and the bamboo fiber directions of the lamina 10, 30A, 30B are the vehicle length direction. The bamboo fiber directions of the bamboo laths of the Yokoneta 1E Lamina 20A, 20B, 40A, 40B are unified in the vehicle width direction, and the bamboo fiber directions of these Lamina 20A, 20B, 40A, 40B are the vehicle width directions. There is.

When the floor plate 120 is installed on the horizontal root thickness 1C, the fastener is driven into the floor plate 120 and the horizontal root thickness 1C from the upper surface of the floor plate 120 to fix the floor plate 120 to the horizontal root thickness 1C. The fastener will be driven into the uppermost lamina 20A of the Yokoneta 1C. Then, cracks grow from the fastener in the direction of the bamboo fibers of the bamboo lath 21A, that is, in the vehicle width direction, but the cracks grow on the connection surface with the bamboo lath 21A connected in series or the boundary surface with the lamina 10. The Lamina 20A is not split in two and separated because it stops at. When the fastener reaches the lamina 10, the lamina 10 itself may split in two in the vehicle width direction with the fastener as a boundary, but since the lamina 10 is sandwiched between the laminas 20A and 20B, The fragments of Lamina 10 do not separate. Even if the fastener reaches the lamina 20B, the lamina 20B is not split into two and separated like the lamina 20A. Therefore, even if the driving fastener is driven into the horizontal root thickness 1C, the horizontal root thickness 1C is not cracked and divided. The horizontal roots 1D and 1E are not broken and divided by the driving of the fastener.

(5) The stacking direction of the lamina of Yokoneta may be orthogonal to the vehicle width direction.

1,1A, 1B, 1C, 1D, 1E ... Bubo 10 ... Central lamina 20A, 20B, 40A, 40B ... Even-numbered lamina counting from the center 10, 30A, 30B ... Odd-numbered lamina counting from the center

Claims (6)

A bubo made of laminated wood that extends in the width direction of the freight vehicle and supports the floor plate of the cargo bed of the freight vehicle from below.
The laminated wood includes three or more laminars laminated in a first direction orthogonal to the vehicle width direction.
Of the plurality of laminas, the three layers of lamina laminated continuously are made of bamboo, and the bamboo fiber direction of the intermediate lamina among the three layers of lamina is orthogonal to both the vehicle width direction and the first direction. Yokoneta for a freight vehicle carrier, which is the second direction in which the bamboo fiber direction of the lamina sandwiching the intermediate lamina is the vehicle width direction. The first direction is the length direction,
The second direction is the vehicle height direction.
The thick Yokone for the freight vehicle carrier according to claim 1. The first direction is the vehicle height direction.
The second direction is the length direction,
The thick Yokone for the freight vehicle carrier according to claim 1. The total number of the plurality of laminas is an odd number of 3 or more.
All of the above multiple laminas are made of bamboo
Of the plurality of laminas, the central lamina is the first, and the bamboo fiber direction of the odd-numbered lamina counted from the central lamina in the first direction is the second direction.
The horizontal root thick for a freight vehicle carrier according to any one of claims 1 to 3, wherein the bamboo fiber direction of the even-numbered lamina counted in the first direction from the central lamina among the plurality of laminas is the vehicle width direction. .. The odd-numbered lamina is made up of a plurality of bamboo laths whose fiber directions are unified in the second direction.
The even-numbered lamina is the horizontal root thick for a freight vehicle carrier according to claim 4, wherein a plurality of bamboo laths whose fiber directions are unified in the vehicle width direction are assembled. The bubo for a freight vehicle carrier according to claim 4 or 5, wherein when n is a natural number, the total number of the plurality of laminas is 4n-1.

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