JP2011046288A - Wheel for festival cart - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a uniformity of a quality as a product and a productivity of a wheel for a festival cart that encounters a large load by an intense movement and a weight of the festival cart. <P>SOLUTION: A wheel 11 for the festival cart is manufactured by cutting a composite timber that is formed by composing and bonding a plurality of timbers with each fiber direction in parallel. A plurality of square timbers 21 are used as the timbers, and a butt end 23 of the timber is square-shaped and vertical and horizontal dimensions of the butt end 23 are the same. The composite timber is formed by arranging these square timbers 21 so that the butt ends 23 are to form a plurality of vertical and horizontal rows in a grid pattern. Since the composite timber is formed of the square timbers of the same dimensions, the composing and bonding can easily and accurately be performed. A circular circumferential face which is a contact face of the wheel 11 for the festival cart with the ground is formed parallel to the fiber direction of the square timbers 21. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention supports a wheel that supports the load of a ground vehicle (or also called “floor wheel” etc.) used at a shrine festival, such as a danjiri festival in Osaka, for example (“ More specifically, the present invention relates to a ground vehicle wheel that has good productivity and qualitative uniformity.

  The wheels for ground vehicles have long been manufactured by cutting solid wood into a cylindrical shape. However, it has become difficult to secure large diameter solid wood. On the other hand, laminated lumber technology such as LVL (single-plate laminate) has also advanced. In such a situation, a wheel as disclosed in Patent Document 1 has been proposed.

  The wheels of Patent Document 1 are assembled by assembling a single piece of wood and rectangular cross-section made of lumber into a combination form in the required vertical and horizontal width, applying adhesive, and pressing and pressing The whole wheel is formed by forming the laminated material into a wheel shape having a predetermined diameter and width.

  According to this configuration, the veneer that is glued together should be selected from the parts with high strength and parts without cracks, decay, and knots. Therefore, it is said that it is possible to obtain a laminated material that is a strong and homogeneous wheel material.

  However, the plurality of single plates to be used have the same thickness, but various width (long side of the lip) dimensions. Such veneers are selected and combined in consideration of cutting later, but press pressing is also required during bonding, so press pressing must also be considered. . For this reason, the assembly work takes time, and there is a difficulty in productivity.

  In addition, a single plate having a rectangular cross section is used. However, as described above, a portion having high strength or a portion free from cracks, rot, or nodes is selected, so that the combination form differs depending on the wheel. For this reason, there is a possibility that a difference in quality such as strength may occur between the front, rear, left and right wheels. In such a case, the balance will be lost when the ground vehicle is supported or when the vehicle is running.

  In addition, although there exists a laminated pillar material as disclosed in the following Patent Document 2, this is to make a single pillar material by adhering the thinned material in a cored state, which is a good part of wood. It is completely different from the laminated wood as engineering wood.

Japanese Patent No. 4231487 JP 56-75811 A

  Therefore, the main object of the present invention is to make the wheels as a product more uniform and increase the productivity.

  Means for this is a ground vehicle wheel manufactured by obtaining laminated wood in which the fibers are laminated and bonded with their fiber directions parallel to each other, and cutting the laminated wood, wherein the laminated wood has a mouthpiece shape. Is formed by arranging a plurality of timbers having a square shape with the same size of the vertical side of the mouthpiece so that the mouth ends are arranged in a grid pattern in multiple rows of warp. The circular outer peripheral surface is a ground vehicle wheel formed parallel to the fiber direction of the wood.

  As for the formation of the laminated timber, it is advisable to bond the timbers to which the adhesive has been applied in a conventional manner, and apply them while pressing them. It's as easy as arranging blocks.

  According to the present invention, the timber forming the laminated timber is arranged in a regular grid pattern with the same size in the form of a square at the mouth end, so that the arrangement work is easy and the form when compressed Inevitably become the same. For this reason, a series of operations of assembling and adhering is easy, and productivity can be improved.

  Moreover, since the arrangement | positioning of the timber for obtaining laminated | stacked timber can be performed regularly, the quality equalization for every wheel for ground vehicles manufactured can be achieved at a high level.

The perspective view of the wheel for ground vehicles. The perspective view of the assembled state of the square material which comprises laminated wood. The perspective view which shows the process of laminated wood. Explanatory drawing which shows the process from the laminated wood to the wheel for ground vehicles. The front view of the wheel for ground vehicles which concerns on another example. The front view of the wheel for ground vehicles which concerns on another example.

An embodiment for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing an example of a ground vehicle wheel 11 (hereinafter referred to as “wheel”). The wheel 11 is formed in a short cylindrical shape, and has a circular outer peripheral surface 12 that serves as a grounding surface that is grounded during use. The circular outer peripheral surface 12 is formed in parallel with the fiber direction of the wood. A shaft hole 14 into which an axle (not shown) is fitted is formed at the center of the side surface 13.

  Manufacture is performed by obtaining laminated wood 22 in which a plurality of square members 21 are laminated and bonded with their fiber directions parallel to each other (see FIG. 2), and then cutting the laminated wood 22. The square member 21 is formed to a length L necessary for manufacturing the wheel 11 having a predetermined width W.

  Here, the square member 21 is one whose ratio of width (long side, width) to thickness (short side, vertical) of the rectangular mouthpiece 23 is less than 4 with respect to thickness 1 (sawmill) Japanese agricultural and forestry standards, Article 3 (1), (2)).

  As the square member 21, a plurality of square members 21 having a rectangular shape and a same size (vertical a width b size) are used. In addition, the square member 21 is a portion free from cracks, rot, and nodes. In other words, a plurality of square members 21 are arranged so that the mouth ends 23 are arranged in a grid pattern in a plurality of rows in the vertical direction to form the laminated timber 22 having a rectangular parallelepiped shape. The laminated wood 22 is formed by applying an adhesive (not shown) to the square members 21 and bonding the square members 21 while pressing them. Note that the size of the square a and width b of the square member 21 is set to a divisor of the desired size of the vertical A and width B of the laminated wood 22. Thereby, the laminated timber 22 of a fixed magnitude | size is obtained only by arranging and overlapping like a building block.

  In the pressure bonding, the square bars 21 to be used have the same dimensions, and the laminated wood 22 becomes a rectangular parallelepiped having a predetermined size. Therefore, sufficient pressure can be easily applied, and the laminated wood 22 has high strength.

  Then, the corners of the laminated timber 22 are dropped, and the surface where the butt 23 gathers is made octagonal to obtain an octagonal laminated timber 24 as shown in FIG. The circular outer peripheral surface 12 is obtained by cutting into a circular shape with a cutting machine, and the flat side surface 13 is obtained by processing the surface on which the mouth ends 23 are gathered into a flat surface, and the shaft hole 14 is further formed. The wheel 11 shown in FIG. 1 is used (see FIG. 4).

  Such a wheel 11 is a high-strength wheel 11 because it is formed by gluing and bonding the square members 21 made of a good quality wood.

  In addition, since the circular outer peripheral surface 12 serving as the ground contact surface of the wheel 11 is parallel to the fiber direction of the square member 21, the wood end 23 of the square member 21 appears on the side surface 13 of the wheel 11 and does not appear on the circular outer peripheral surface 12. In addition, cracking and the like hardly occur due to running or the like, and durability is also obtained.

  In addition, the dimensions of the square bars 21 to be used are all the same, and the square bars 21 are regularly arranged in a grid pattern, so that the assembly bonding work is easy and the workability is good. Moreover, since the form when bonding is necessarily the same, the pressurization can be performed correctly and reliably with a sufficient pressure. For this reason, the difference in accuracy of the product due to the difference in bonding technology is unlikely to occur, uniform processing can be performed, and peeling of the bonding surface and generation of gaps can be eliminated. From this point, the wheel 11 having high strength and durability can be obtained.

  Furthermore, since all the dimensions of the square member 21 are the same, the shape between the square members 21, that is, the form of the bonded portion is the same regardless of who is working, so that uniform quality can be realized also in this respect.

  Since the vertical length a and width b of the mouthpiece 23 of the square member 21 is a divisor of the desired vertical length A and width B of the laminated wood 22, the obtained laminated wood 22 has the same size. Therefore, it is easy to perform all subsequent processing in the same way, and workability is good.

  In addition, since the square member 21 is used, it is not necessary to select a material that does not have knots or decay over the entire width direction as in the case of using a plate member, and materials can be procured more easily than the case of using a plate member.

  In addition, the length a width b of the wood mouth 23 of the square member 21 is not limited to the one shown in FIGS. 1 to 4. For example, as shown in FIG. It may be a thing. Smaller dimensions are advantageous in terms of complete drying of the wood and obtaining only good quality parts.

  As the wood for obtaining such a wheel 11, a square member 21 made of a laminated material 25 can be used as shown in FIGS. 6 (a) and 6 (b). The square member 21 made of the laminated material 25 is obtained by gluing and bonding the ground plates 25a in the thickness direction t in parallel to the fiber direction. In this case, the laminated timber 22 is configured by arranging the laminated timbers 22 so that the thickness direction t of the laminated timber 25 is alternated between the laminated timbers 25 adjacent to each other in the longitudinal direction of the laminated timber 22. Is done.

  As the laminated material 25, as shown in FIG. 6B, for example, an existing laminated pillar material of 105 mm square can be used.

  Thus, in the wheel 11 in which the laminated wood 22 is composed of the laminated wood 25, the effect that the strength variation is small and the strength, which is the advantage of using the so-called laminated wood, can be sufficiently increased as compared with the case where the square wood 21 is used. Can enjoy.

In correspondence between the configuration of the present invention and the configuration of the one aspect,
The wood of the present invention corresponds to the square member 21 or the laminated member 25,
The present invention is not limited to the configuration of the one form, and other forms can be adopted.
For example, the timber may have a square end shape.

DESCRIPTION OF SYMBOLS 11 ... Wheel for earth vehicles 12 ... Circular outer peripheral surface 21 ... Square material 22 ... Glued wood 23 ... Kuchi 25 ... Glued wood 25a ... Grinding board t ... Thickness direction

Claims (3)

A wheel for ground vehicles manufactured by obtaining laminated timber obtained by laminating and bonding timbers with their fiber directions parallel to each other, and cutting the laminated timber,
The laminated timber is formed by arranging a plurality of timbers having a square shape at the end and the same length of the end of the end, so that the ends of the end are arranged in a grid pattern in a plurality of rows.
A ground wheel having a circular outer peripheral surface which is a ground contact surface of the ground vehicle wheel formed in parallel to the fiber direction of the wood. The ground vehicle wheel according to claim 1, comprising a square member in which a vertical size of a butt of the wood is a divisor of a desired vertical size of the laminated wood. The wood is composed of a laminated material obtained by gluing and bonding the saw plates in the thickness direction with their fiber directions parallel to each other,
The said laminated wood is the said laminated lumber, The said laminated lumber was arranged and comprised so that the said thickness direction of what adjoins mutually in the vertical direction in the said laminated lumber could be staggered, or was comprised. 2. Ground vehicle wheel according to 2.

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