KR102061591B1 - Shovel plow intergrated with handle for metal pipe and its manufacturing method - Google Patents

Abstract

The present invention is to construct a shovel using a metal tubular body, the handle is configured to be integrally bent to configure the upper end, to provide a simple shovel, as well as excellent durability and durability.
As a means for solving the above problems, the present invention bends the handle by integrally by bending the upper end portion of the metal pipe body with a bending machine, the primary body of the metal pipe body of the shovel in one direction, and primary The bent portion of the bent main body is again bent secondly to the other direction so that the bent handle is integrally bent at the top of the shovel.

Description

Handle integrated shovel and metal manufacturing method using metal tube {SHOVEL PLOW INTERGRATED WITH HANDLE FOR METAL PIPE AND ITS MANUFACTURING METHOD}

The present invention relates to a handle-integrated shovel using a metal tube, and in particular, to provide a shovel, which is not only easy to manufacture but also excellent in durability and robustness.

In general, the shovel is used in a variety of applications, the blade, the shovel and the handle is prefabricated.

Blades will vary depending on the application, but they are used for cutting and bending metal sheets or injection molding with synthetic resin.

In addition, in the case of the shovel to be provided in the invention is provided products of various materials and configurations.

Looking at the prior art related to the shovels manufactured by material, and as shown in Patent Publication No. 10-2004-0012624 "Thurs shovels reinforced with wood" (Patent Document 1) to construct a shovel, As in 10-1037390, "assembled shovel" (patent document 2), injection molding with synthetic resin to form a shovel, and a utility model registration No. 20-0454792 "improved shovel" (patent document 3) It is manufactured and used in various materials and configurations, such as the processing of pipes to form shovels.

In the case of wood is required logging because there is a limit to the supply and demand of the material, there is a disadvantage that is not only heavy but also weakness.

In addition, when injection molding with synthetic resin, the supply and demand of the material can be expected, but the robustness is weak.

Therefore, in order to make up for the weak solidity, a means of injecting and molding metal pipes integrally inside the injection molding of the shovel with synthetic resin is proposed. It is a reality.

In addition, when constructing a shovel with a metal tube, durability and robustness may be generally satisfied. However, there is some inconvenience in that a separate handle is required by injection molding, and in the case of a handle that is injection molded of synthetic resin, it is frequently used. There were also disadvantages such as causing damage.

Patent Publication No. 10-2004-0012624 "School reinforced with a neck" Patent No. 10-1037390 "Assembled Shovel" Utility Model Registration No. 20-0454792 "Improvement Shovels"

The present invention is to construct a shovel using a metal tubular body, the handle is configured to be integrally bent to configure the upper end, to provide a simple shovel, as well as excellent durability and durability.

As a means for solving the above problems, the present invention bends the handle of the shovel bag made of a metal pipe by bending the upper end of the metal pipe body integrally, the primary bending of the main body of the metal pipe shovel in one direction, and primary The bent portion of the bent main body is again bent secondly to the other direction so that the bent handle is integrally bent at the top of the shovel.

If the thickness of the metal tube used as a shovel in the process is thick, it is possible to manufacture a handle-integrated shovel without difficulty through the first and second bending, but to reduce the weight of the shovel, In this case, a separate auxiliary tube is inserted into the inner surface of the secondary bent portion so that smooth bending can be made.

The present invention is configured to bend the handle by integrally by bending the upper end of the shovel of the metal tube with a bending machine, the body of the shovel of the metal tube first bending in one direction, and the bent portion of the primary bent back to the other direction By the second bending to be configured to be folded integrally bent handle to the top of the shovel, not only the production is easy, but also has the effect of providing a shovel with excellent durability and durability.

1: perspective view of the present invention shovel
2 is a partial cross-sectional view of the shovel of the present invention
3 is a partial cross-sectional view of the shovel of the present invention, a state in which the secondary tube is inserted into the secondary bent portion
4 is a block diagram of a metal tube for making a shovel of the present invention
5 is a state diagram of the first bent metal tube of FIG.
6: Secondary state bending of the metal tube of FIG. 5
7 is a state in which the auxiliary pipe is inserted into the inner surface of the metal pipe in the state of FIG.
8: First state bending of the metal tube of FIG. 7
9: Secondary bending state of the metal tube of FIG. 8
Figure 10: block diagram of the shovel manufacturing process of the present invention

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a shovel 10 to be provided in the present invention, which is composed of a main body 20 made of a metal tube and a handle 30 formed by bending an upper end of the main body 20.

If the material of the main body 20 is a metal material such as stainless pipe or steel pipe, there is no problem in use.

Referring to the configuration of the handle 30 is configured in more detail the top of the main body 20, by forming the primary bent portion (A) bent in the outward direction on the top of the main body 20, the upward inclined body 21 And a second bent portion (B) in an inward direction, that is, the opposite direction of the first bent portion (A), on the top of the upwardly inclined body (21) to form a horizontal body (22), The main body 21 and the horizontal main body 22 are configured to be connected through the curved main body 23.

At this time, the first bend angle (A-1) of the first bent portion (A) is bent at an acute angle, the upward inclination body 21 is configured to be inclined upward in a gentle form, but the degree of the first bend angle (A-1) Ideally, the bend should be within 20 to 45 °.

If the primary bending angle of the primary bent portion (A) is 20 degrees or less in the above, in order to secure the required length of the horizontal body 20, the length of the upward inclined body 21 is not preferable, the primary If the bending angle is 45 degrees or more, the secondary bending angle B-1 of the secondary bending portion B becomes too large, and the fatigue degree of the bending portion becomes high, which is not preferable because the occurrence of defects increases.

In the invention, when the thickness of the metal tube constituting the main body 20 is thin, the secondary bent portion B, that is, the hollow portion 31 of the main body 20 in which the curved body 23 is located is made of metal. The separate auxiliary body 40 is inserted, the auxiliary body 40 when the handle is bent in the secondary bent portion (B) so that the oblique angle of the main body 20, that is, the upward inclined body 21 in the secondary bending step (B) Even when the curved body 23 is formed by bending as described above, smooth bending can be made without difficulty.

In addition, the upper end portion of the main body 20, the handle 30 is configured to be bent through the primary bending portion (A) and the secondary bending portion (B), based on the central portion (C) of the main body 20, the curved body ( The outer end D of the 23 and the outer end E of the horizontal body 22 are positioned equidistantly.

Because when using the production shovel 10, one hand holding the body 20, the other hand in the process of holding the horizontal body 22 of the handle 30, holding the horizontal body 22, the force The force is applied evenly without any tendency to pull in one direction so that a comfortable shoveling work can be performed.

The inner end portion E of the horizontal body 22 may be protected from a sharp cut surface during use by forming an inwardly bent portion 32 by cutting the body 20 made of metal pipe or by separately processing the cut portion after cutting. To be.

An embodiment of the manufacturing process of the handle-integrated shovel using a metal tube will be described.

In the embodiment of the invention was applied to the material of the main body 20 constituting the shovel 10 with a stainless pipe, for bending and reinforcement on the inner surface of the curved body 23 constituting the handle 30 as shown in FIG. It will be described in the form without any auxiliary means, and the auxiliary pipe 40 for bending and reinforcement as shown in FIG.

Example 1 is a case in which there is no auxiliary means for smooth bending and reinforcement on the inner surface of the handle 30, as shown in Figure 2, the metal tube used as the body 20, that is, the thickness (T) of the stainless steel pipe is thick This applies when the bending of 30 can be made smoothly.

In Example 1, the diameter of the main body 20 was 34 phi , and the thickness T was 1.5 mm.

Creative preparation stage (S1)

Material preparation step (S1) is a step of preparing a main body 20 for the production of the shovel 10 by cutting a metal tube of a desired diameter to a set length, by cutting a long metal tube formed of a long and then cut the surface As shown in 4, the inward bent portion 32 curved toward the hollow portion 31 of the main body 20 is configured.

1st bending step (S2)

The primary bending step (S2) by bending the upper end portion of the main body 20 prepared in the material preparation step (S1) in one direction as shown in Figure 5 using a bending machine to form the primary bending portion (A), (20) The upper inclined body 21 is formed at the upper end.

The primary bending angle A-1 in the primary bending step S2 is bent within an acute angle range.

Ideally, the primary bending angle A-1 is ideally bent within a range of 20 to 45 °, and in Example 1, the primary bending angle A-1 is set to 32 °.

Second bending step (S3)

In the second bending step S3, as shown in FIG. 6, a portion of the upwardly tilting body 21 formed in the first bending step S2 using a bending machine is used in another direction, that is, the bending opposite direction of the first bending part A. FIG. Bent to form a secondary bent portion (B), and a portion of the upwardly inclined body (21) is bent through the secondary bent portion (B), and divided into a curved body (23) and a horizontal body (22). By forming, the production of the shovel 10 in which the handle 30 is integrally bent at the upper end of the main body 20 is completed.

In the second bending process, as shown in FIG. 6, the horizontal body 22 is bent in a horizontal state with respect to the body 20 in a state in which the main body 20 is placed vertically, thereby bending at an obtuse angle or more, and the second bending. The angle B-1 depends on the degree of bending of the primary bending angle A-1.

Since the primary bending angle A-1 is 32 degrees, the secondary bending angle B-1 becomes 122 degrees.

In the process of bending the handle 30 through the first bending step (S2) and the second bending step (S3), the overall bending ratio is based on the central portion (C) of the body 20, the outer side of the curved body (23) The end D and the outer end E of the horizontal body 22 are located at an equidistant distance, that is, at substantially the same distance.

Embodiment 2 is a case of inserting the auxiliary pipe 40 for smooth bending and reinforcement on the inner surface of the curved body 23 constituting the handle 30, as shown in Figure 3, that is, a metal pipe used as the main body 20, that is When the thickness (T) of the stainless steel pipe is thin, smooth bending of the handle 30 is difficult.

In other words, when the thickness T of the metal tube used as the main body 20 is less than 1 mm, the forming of the primary bent portion A is easily bent, but the secondary bent portion is bent at an obtuse angle of 90 ° or more. In (B), bending work is almost impossible.

In other words, when the main body 20 has a diameter of 34 φ and is bent at an obtuse angle using a material having a thickness T of 1 mm or less, the inside of the main body 20 of the thinly formed secondary bent portion B is crushed, This is because popping occurs on the outside.

In order to prevent this phenomenon, the secondary pipe body 40 is inserted into the curved body 23 that is bent in the second bending step (S3) to smooth the bending.

In addition, even if the thickness (T) of the main body 20 is normally bent, because the firmness of the handle 30 is bent configuration is weak, it also serves to reinforce it.

In particular, if the thickness of the main body 20, as in Example 2, it is possible to bend smoothly without a separate auxiliary tube 40, but as the thickness is thick, the weight is heavy, there is a problem that the cost increases.

Therefore, in Example 2, while the thickness of the main body 20, the auxiliary pipe 40 is fitted to the inner surface of the curved body 23 bent at the secondary bending portion (B) that is weak in bending and robustness, light, firm shovel It is to provide a bag (10).

The manufacturing process of the shovel 10 through Example 2 is the same as that of Example 1 except that the auxiliary pipe 40 is fitted to the inner surface of the main body 20 where the curved body 23 is located.

Creative preparation stage (S1)

Material preparation step (S1) is a step of preparing a main body 20 for the production of the shovel 10 by cutting a metal tube of a desired diameter to a set length, cut the metal tube formed of a long and then hollow portion 31 Insert a separate auxiliary pipe (40) to the handle 30 is inserted into the portion where the curved body 23 is located when bending, and in the above state by processing the cut surface as shown in Figure 7 inward bending portion ( 32) is formed.

1st bending step (S2)

The primary bending step (S2) by bending the upper end portion of the main body 20 prepared in the material preparation step (S1) in one direction as shown in Figure 8 using a bending machine to form the primary bending portion (A), (20) The upper inclined body 21 is formed at the upper end.

The primary bending angle A-1 in the primary bending step S2 is bent within an acute angle range.

Ideally, the primary bending angle (A-1) is ideally bent within a range of 20 to 45 °, and in Example 2, the primary bending angle (A-1) is also set to 32 °.

Second bending step (S3)

Secondary bending step (S3) is the other side, that is, the bending direction of the primary bent portion (A) using the bending machine as shown in Fig. 9 the portion of the upward tilting body 21 formed in the first bending step (S2) Bent to form a secondary bent portion B, and a portion of the upwardly inclined body 21 is bent through the secondary bent portion B, and is divided into a curved body 23 and a horizontal body 22. By forming the handle 30 is bent to form, the production of the shovel 10 is completed.

In the second embodiment, unlike the first embodiment, since the auxiliary pipe body 40 of the metal material fitted into the hollow portion 31 of the main body 20 is also bent together in the second bending step S3, the thickness of the main body 20 ( Even if T) is 1 mm or less, bending is possible at an obtuse angle.

In other words, when the secondary bent portion B is bent using the bending machine with the upwardly inclined main body 21 firstly bent in the second bending step S2, the metal material is inserted into the inner surface together with the main body 20. Auxiliary tube 40 is also bent together.

Therefore, the auxiliary tubular body 40 having a thickness of 2 mm and the main body 20 having a thickness of 1 mm are integrally bonded and bent at the same time. Thus, even in the case of the thin body 20, the auxiliary tubular body is not crushed or damaged. It is smoothly bent along 40, and the bending of the curved body 23 connecting the upward tilting body 21 and the horizontal body 22 is completed.

In the second bending process, as shown in FIG. 9, the horizontal body 22 is bent in a horizontal state with respect to the body 20 in a state in which the main body 20 is placed vertically, and thus the horizontal body 22 is bent at an obtuse angle or more. The angle B-1 depends on the degree of bending of the primary bending angle A-1.

Since the primary bending angle A-1 is 32 degrees, the secondary bending angle B-1 becomes 122 degrees.

In the process of bending the handle 30 through the first bending step S2 and the second bending step S3, the overall bending ratio is curved based on the center C of the main body 20 as in the first embodiment. The outer end D of the main body 23 and the outer end E of the horizontal body 22 are positioned at an equidistant distance.

In Examples 1 and 2, the order of the first bending step S2 and the second bending step S3 may be changed depending on working conditions.

The shovel 10 of the present invention manufactured as described above is manufactured using the main body 20 composed of a metal tube, but through the first bent portion A and the second bent portion B at the upper end of the main body 20. The handle 30 having the upward tilting body 21, the curved body 23, and the horizontal body 22 is integrally bent, thereby making the shovel 10 not only easy to manufacture, but also excellent in durability and robust. I can make it.

In particular, when the metal tubular body constituting the main body 20 is thin and the bending of the secondary bent portion B is difficult, the metal material is formed in the hollow portion 31 of the main body 20 of the portion where the curved main body 23 is formed. By inserting the auxiliary pipe body 40 in advance, by allowing the curved body 23 to be bent through the secondary bent portion (B), even if the thickness of the main body 20 is a smooth bending operation is made.

Particularly, in the case of the shovel 10 manufactured in Example 2, the auxiliary tube 40 supports the weak rigidity of the handle 30 due to the thinning of the body 20 by reducing the thickness of the main body 20 by lightening the overall weight. Since it is possible to use a light, sturdy shovel (10).

The blade coupled to the bottom of the shovel 10 may be assembled in various ways depending on the shape and structure of the blade.

(10)-shovel (20)-body
(21)-Upward Slant Body (22)-Horizontal Body
(23)-Bent Body (30)-Handle
(31)-Hollow (32)-Inward Bending
(40)-Auxiliary tube (A)-1nd bend
(B) -Secondary bend (C)-Center
(D)-Outer End (E)-Outer End

Claims (5)

By bending the upper end of the main body 20 made of a metal tube, the handle 30 is integrally formed, and the bending form of the handle 30 is inclined upward in one direction through the primary bent portion A that is bent at an acute angle. The inclined body 21 is bent, the primary bend angle A-1 of the primary bent portion A is an acute angle, and the upwardly inclined body 21 is primary through the secondary bent portion B. By bending in the opposite direction of the bending portion A, the curved body 23 and the horizontal body 22 are bent, and the secondary bending angle B-1 of the secondary bending portion B is bent at an obtuse angle. In constructing the handle-integrated shovel using the metal tubular body, the auxiliary tubular body 40 is inserted into the hollow part 31 of the curved main body 23 constituting the secondary bent part B, and the curved main body 23 is formed. By integrally bending together with the body, the handle body integrally using the metal tube, characterized in that the main body 20 is formed without bending or breakage phenomenon Mold shovel. delete delete delete In manufacturing the shovel with the handle 30 integrally bent to the upper end of the main body 20 made of a metal tube, by cutting the metal tube to a predetermined length to prepare a main body 20 for the production of the shovel 10, The auxiliary tubular body 40 is inserted into the hollow part 31 of the main body 20 so that the auxiliary tubular body 40 is positioned at the hollow part 31 of the portion of the curved body 23 that is bent at the secondary bent part B. The material preparation step (S1) for preparing the main body 20 and the upper end portion of the main body 20 obtained in the material preparation step (S1) to be bent in one direction to form a primary bent portion (A), the primary bending angle (A-1) is to be bent in an acute angle range, the first bend step (S2) and the primary inclined body 21 is formed in the upper end of the main body 20 through the first bent portion (A), and 1 The upward inclined body 21 obtained in the second bending step S2 is bent in a direction opposite to the bending of the primary bent portion A, and together with the auxiliary tubular body 40 fitted to the hollow portion 31 of the main body 20. Comprising a curved secondary bending portion (B), the secondary bending angle (B-1) is bent within the obtuse angle range, a portion of the upward tilting body 21 through the secondary bending portion (B) is bent While being divided into a curved main body 23 and a horizontal main body 22 in which the auxiliary pipe 40 is inserted into the hollow part 31, the handle 30 is integrally bent at the upper end of the main body 20. Method of manufacturing a handle-type shovel using a metal tube, characterized in that the manufacturing through the second bending step (S3) to be produced (10).

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