Bracket of truck and truck including the same

Abstract

To provide a bracket of a truck which facilitates assembly, maintains adequate strength while being lightweight, and has a function of preventing corotation of a bolt and a nut, and a hand-pushing truck having the bracket.SOLUTION: There is provided a bracket for connecting a handle of a hand-pushing truck and a top plate part, wherein the bracket body is made of a resin, and includes two parts of a first member and a second member, and a rib is formed on inside surfaces of the first member and the second member.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a bracket that connects a handle and a top plate portion of a dolly, and a dolly equipped with the bracket. [Background technology]

[0002] In the past, brackets connecting the handle and top plate of trolleys were often made of metal. Although these brackets were durable, they had drawbacks such as being difficult to assemble and being heavy. Metal brackets are also difficult to mold and process, so it can be difficult to manufacture brackets with specific shapes and strengths. Furthermore, when attaching the brackets, special structures and secondary processing are required to prevent the bolts and nuts from rotating together. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2006-76428 Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, the bracket of the trolley is formed by bending a single metal plate which is formed into a predetermined shape by punching or the like (paragraph 0013). As described above, the bracket of the trolley is made of a single metal plate, which has the disadvantage of being heavy. Also, when attaching the bracket to the top plate, the bolt and nut often rotate together.

[0005] To provide a bracket for a trolley which is easy to assemble, has a suitable strength despite being lightweight, and has a function of preventing the bolt and nut from rotating together, and a hand truck having the bracket. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the present invention provides a bracket for connecting the handle and top plate of a push cart, the bracket body being made of resin and comprising two parts, a first member and a second member, with ribs formed on the inner surfaces of the first member and the second member. The present invention also provides a bracket characterized in that the first and second members have bolt mounting holes on the inside of each member, and when the bolt mounting holes of the first member are located at the rear of the tabletop, the bolt mounting holes of the second member are positioned at the front of the tabletop, and conversely, when the bolt mounting holes of the first member are located at the front of the tabletop, the bolt mounting holes of the second member are positioned at the rear of the tabletop, in an alternating front-to-back arrangement. Effect of the Invention

[0007] The present invention provides a bracket that is lightweight and easy to assemble. In particular, the unique component arrangement and rib formation improve strength and durability, and also realize the function of preventing the bolt and nut from rotating together. Furthermore, the adoption of such a bracket is expected to reduce the weight of the entire trolley, making it easier to handle and move, and improving the overall durability and lifespan. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] The present invention will be described in detail below with reference to the drawings. Fig. 1 is a diagram showing an overview of the handcart of the present invention. Reference numeral 1 denotes a top plate, 2 to 5 wheels, 6 a handle, and 7 a bracket that connects the handle and the top plate. The wheels 2 to 5 are attached to the four corners of the bottom of the top plate 1. The handle 6 is U-shaped, and both ends of the handle 6 are attached to two corners of the top plate 1. The handcart can be moved by loading luggage or the like onto the top plate 1 and manually pushing the handle 6.

[0009] FIG. 2 is a perspective view of the bracket 7 when the handle is connected. Reference numeral 1 denotes a top plate, 6 denotes a handle, and 13 denotes a lever shaft. When an operator steps on the lever shaft 13, the handle 6 can be tilted forward.

[0010] FIG. 3 is a perspective view of the bracket 7 before assembly, as viewed from the front of the table top. The bracket body is made of resin and includes two parts, a first member 12a and a second member 12b. It has an opening 19 through which the handle 6 passes.

[0011] FIG. 4 is a cross-sectional view of the bracket 7 when the handle 6 is connected. Reference numeral 1 denotes a tabletop, 6 denotes a handle, 12a denotes a first member of the bracket, 13 denotes a lever shaft, 14a denotes a torsion spring, and 15 denotes a support shaft. In Fig. 4, the right side is the operator's side (hereinafter referred to as the rear of the tabletop), and the left side is the front of the tabletop.

[0012] The bracket body is made of resin and is attached to the upper surface of both corners of the rear end of the tabletop 1. The ends of the bracket 7 and the handle 6 are axially attached by a support shaft 15. The handle 6 is rotatable, but because it interferes with the upper end 20 of the bracket opening 19, the handle 6 can only be tilted forward.

[0013] The lever shaft 13 passes through an elongated guide hole 8a provided in the first member 12a of the bracket 7. Note that since no guide hole is provided in the other, second member 12b, the lever shaft 13 does not pass through. The lever shaft 13 is supported by a pair of brackets 7 .

[0014] Torsion spring 14a is attached to locking portion 16a of first member 12a. Guide hole 8a is elongated in the vertical direction, so lever shaft 13 is pushed upward by the bias of torsion spring 14a. Therefore, handle 6 is sandwiched between lever shaft 13 and rivet 22, and is normally structured such that it cannot be tilted forward. When an operator steps on lever shaft 13 and holds it at the lower end of guide hole 8a, handle 6 can be tilted forward.

[0015] Next, the bracket according to the present invention will be described. FIG. 5 is an oblique view of the first member 12a of the bracket 7 from the inside when the handle is connected, FIG. 6 is an oblique view of only the first member 12a of the bracket 7 from the inside, and FIG. 7 is an oblique view of the first member 12a of the bracket 7 with a bolt fixed thereto, as viewed from the inside. The first member 12a has a rib formed on its inner surface. Reference numeral 16a denotes a locking portion for attaching the torsion spring 14a, 17a denotes a bolt mounting hole, and 18a denotes a fixing portion for the head of the bolt.

[0016] The bracket 7 of the carriage is made of resin. A specific material is preferably 100% polycarbonate, which is a plastic having impact resistance.

[0017] By using resin instead of the conventional metal bracket, assembly is easier and the overall weight is reduced. Furthermore, whereas metal brackets consist of one part, the bracket of the present invention has a two-part structure. This two-part structure is designed to make it easier to process the inside of the bracket, and the ease of processing of resin in particular is a major advantage.

[0018] In order to reduce the weight of the bracket, it is preferable that the bracket body is designed to be thin, but a rib structure is used inside to ensure strength. The bracket is characterized in that the ribs can be formed more easily by being separated into two parts than in the case of a one-piece molding.

[0019] The bracket body is made of resin and comprises two parts, a first member and a second member, and is characterized in that ribs are formed on the inner surfaces of the first member and the second member.

[0020] Fig. 8 is a perspective view from inside showing how the bolt 9 is fixed to the second member 12b of the bracket 7. The second member 12b has a bolt mounting hole 17b. The first member 12a and the second member 12b have symmetrical shapes, but what is particularly noteworthy is the position of the bolt mounting hole. The position of the bolt mounting hole of the first member 12a is located behind the top plate (Fig. 7), whereas the position of the bolt mounting hole of the second member 12b is located in front of the top plate (Fig. 8).

[0021] The reason for this arrangement is that by providing the mounting holes in different positions at the front and back, the connection between the top plate and the bracket receives uniform force, resulting in improved overall balance. In addition, the alternating front-to-back mounting hole arrangement also has the effect of dispersing the stress and torque that the bracket receives, which disperses the force and stress that would otherwise be concentrated in one place, reducing the risk of damage to the bracket or tabletop. Therefore, by arranging the mounting holes alternately front to back, it is possible to make the connection between the bracket and the tabletop more stable and strong.

[0022] In other words, the first and second members have bolt mounting holes on the bottom surface of each member, and when the bolt mounting holes of the first member are located at the rear of the top plate, the bolt mounting holes of the second member are positioned in front of the top plate, and conversely, when the bolt mounting holes of the first member are located in front of the top plate, the bolt mounting holes of the second member are positioned behind the top plate, thereby forming a bracket characterized by an alternating front-to-back arrangement.

[0023] In FIG. 6, the first member 12a has a fixing portion 18a above the bolt attachment hole 17a. The shape of the fixing portion 18a corresponds to the shape of the hexagonal bolt head 10. In other words, the fixing portion 18a has a semi-open hexagonal shape, which is designed to ensure that the hexagonal bolt head 10 remains in position and prevents unexpected movement. This shape makes it possible to prevent the bolt and nut from rotating together when attaching and detaching the bolt from the trolley.

[0024] When the bolt is an octagonal bolt, the fixing portion 18a is preferably in the shape of a semi-open octagon.

[0025] In other words, the fixing part above the bolt mounting hole corresponds to the shape of the bolt head, and the bolt mounting hole has a function of preventing the bolt and nut from rotating simultaneously when mounting to and removing from the trolley. The shape of the fixing part is preferably an open hexagonal or octagonal shape to match the shape of the nut.

[0026] In this way, bracket 7 makes maximum use of the properties of polycarbonate resin, and has the excellent effects of being lightweight and easy to process compared to conventional metal brackets. [Brief description of the drawings]

[0027] [Figure 1] 1 is a schematic view of a hand truck according to the present invention; [Diagram 2] FIG. 2 is a perspective view of a bracket when the handle of the present invention is connected. [Diagram 3] FIG. 2 is a perspective view of the bracket before assembly as seen from the front of the tabletop of the present invention. [Figure 4] FIG. 2 is a cross-sectional view of the bracket when the handle of the present invention is connected. [Diagram 5] FIG. 2 is a perspective view of a first member of the bracket when the handle of the present invention is connected. [Figure 6] FIG. 2 is a perspective view of only the first member of the bracket of the present invention as viewed from the inside. [Figure 7] 1 is a perspective view showing a bolt being fixed to a first member of a bracket of the present invention, as viewed from the inside. FIG. [Figure 8] 11 is a perspective view showing a state in which a bolt is fixed to a second member of the bracket of the present invention, as viewed from the inside. FIG. [Explanation of symbols]

[0028] 1. Top plate 2~5 wheels 6 Handle 7 Bracket 8a Guide hole 9 Volts 10 Bolt Head 12a First member 12b Second member 13 Lever shaft 14a Torsion spring 15 Spindle 16a Locking part 17a 17b Bolt mounting holes 18a Fixed part 19 Bracket opening 20 Upper end 21 Lower end 22 Rivet

Claims

1. A bracket that connects the handle and top plate of a hand truck. The bracket body is made of resin and includes two parts, a first member and a second member. A bracket characterized in that ribs are formed on inner surfaces of the first member and the second member.

2. The bracket according to claim 1, The first member and the second member each have a bolt attachment hole on a bottom surface of the member, This bracket is characterized by having an alternating front-to-back arrangement, in which when the bolt mounting holes of the first member are located at the rear of the tabletop, the bolt mounting holes of the second member are located at the front of the tabletop, and conversely, when the bolt mounting holes of the first member are located at the front of the tabletop, the bolt mounting holes of the second member are located at the rear of the tabletop.

3. The bracket according to claim 1 or 2, The fixing portion at the top of the bolt mounting hole has a shape corresponding to the shape of the head of the bolt, A bracket characterized by having a function of preventing a bolt and a nut from rotating simultaneously when attaching to or detaching from a trolley.

4. 4. The bracket according to claim 3, wherein the fixing portion has a semi-open hexagonal or octagonal shape that matches the shape of the head of the bolt.

5. A hand truck comprising the bracket according to any one of claims 1 to 4.

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