JPH11211108A - Tripod and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tripod which has a frame body with a shape that has a sufficient strength to a load and moreover, allows a lighter weight and a manufacturing method which enables curtailing of cost by facilitating the production of the frame body. SOLUTION: A frame body 3 of a tripod is provided to integrally support a plurality of catch members 2 on which a cooking device is placed. The frame body 3 is provided with a circular base part 5, a first side extension part 6 extended to one side from an upper end rim of the base part 5 and a first vertical extension part 7 extending upward from the tip of the first side extension part 6. The frame body 3 also is provided with a second side extension part 8 extended parallel with the first side extension part 6 from a lower end rim of the base part 5 and a second vertical extension part 9 extending downward from the tip of the second side extension part 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a virtue comprising a plurality of claw members on which cooking utensils are placed, and an annular frame for integrally supporting the claw members, and a method of manufacturing the same.

[0002]

2. Description of the Related Art Such a virtue is composed of a plurality of claw members on which cooking utensils such as pots are placed and positioned above a stove burner, and a plurality of claw members mounted on a stove top plate around the stove burner. And a frame body that integrally supports them. Normal,
A step is formed on the stove top plate along the peripheral edge thereof, and the frame is placed on the upper surface of the step as a placement portion. The frame body is formed by bending an iron bar-shaped frame material corresponding to the length along the placement portion of the stove top plate so as to correspond to the shape along the placement portion of the stove top plate, and ends edges thereof. They are welded to each other to form an annular shape.

Incidentally, a so-called system kitchen recently seen is provided with a plurality of stove burners, and a relatively large stove top is provided. Along with this, the shape (annular outer peripheral dimension) of the frame is made relatively large, and a gode that integrally supports the claw member at a position corresponding to a plurality of stove burners of a single frame is adopted. I have.

[0004] However, if the frame has a relatively large annular outer peripheral dimension, the load caused by placing the cooking utensil causes
The entire frame is likely to be twisted or distorted, which may make it difficult to stably mount the cooking utensil.

Therefore, conventionally, as shown in FIG. 7, the frame 50 has a substantially rectangular shape in a longitudinal sectional view, and its thickness x is formed relatively thick.
Even if the outer peripheral dimension of the 0 ring is relatively large, an attempt is made to obtain a sufficient strain strength. In addition, at the upper end of the frame body 50,
A claw member 51 for placing a cooking utensil (not shown) is provided integrally (although a single one is shown, but actually a plurality thereof).

However, since the thickness x is relatively large, the weight of the frame body 50 is relatively large. For example, not only is the burden on the operator in handling at the time of shipment, but also the cleaning of the stove is required. In such a case, there is an inconvenience that the user is burdened. Further, in the frame body 50 having the shape shown in FIG. 7, even if the thickness x is relatively thick, not only the strain strength cannot be drastically improved, but also a sufficient pressure resistance cannot be obtained. .

Next, a description will be given of a conventional method for manufacturing a virtue. A frame 50 having a sectional shape shown in FIG. 7 is manufactured as follows. That is, wire drawing is performed using a mild steel wire (SWRM) as a material, and through a surface treatment such as lime coating, the wire wound in a coil shape is drawn out to a predetermined diameter. Thereafter, a plurality of rolling processes are performed to form a substantially rectangular cross section shown in FIG. 7 described above, and further, the bar is cut into a predetermined length (the length along the mounting portion of the stove top plate) and cut into a rod-shaped frame. Form body material. Then, both ends of the frame material are bent to form an annular shape by abutting each other, and both ends of the abutted frame material are welded.

As described above, in order to obtain a sufficient thickness x as shown in FIG. 7, the frame 50 is formed by using the wire having a similar cross-sectional shape to the frame as a material and drawing the wire in a plurality of steps. It is formed in a substantially rectangular cross section by rolling.

[0009] However, not only a large-scale processing machine is required for each step for drawing and rolling for a plurality of steps, but also the mild steel wire (SWRM) as a material is expensive. However, there is a disadvantage that the cost is extremely high.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is to provide a virtue having a frame having a sufficient strength against a load and capable of reducing the weight. It is another object of the present invention to provide a method for producing a frame that can easily produce the frame and reduce costs.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a virtue comprising a plurality of claw members on which cooking utensils are placed and a frame body integrally supporting each claw member.
The frame body has a base formed in an annular shape, a first side extension extending from the upper edge of the base to one side, and a first side extension from the lower edge of the base. And a second laterally extending portion extending in the same direction in opposition to the above.

According to the present invention, the frame is provided with the first laterally extending portion and the second laterally extending portion and the frame is formed to have a substantially U-shaped cross section. Even if the thickness of the frame is thinner than that of the frame having a substantially rectangular cross section, sufficient strain strength and pressure resistance can be obtained. This makes it possible to reduce the weight of the frame while maintaining sufficient strength against a load.

[0013] In the virtues of the present invention, the frame may be
A first vertical extension integrally extending upward along a leading edge of the first lateral extension; and a lower portion integrally extending along a leading edge of the second lateral extension. And a second vertically extending portion extending in the direction.

In the present invention, the first and second laterally extending portions of the frame are provided with the vertical extending portions, respectively, so that the strain strength and the pressure resistance are reduced. It can be further improved. Thereby, the thickness can be further reduced while maintaining sufficient strain strength and pressure resistance. Thereby, the weight of the frame can be further reduced.

[0015] A first aspect of the method of manufacturing a virtue of the present invention is a virtue comprising a plurality of claw members on which cooking utensils are placed, and an annular frame body integrally supporting the claw members. The method of manufacturing, from a coil formed by winding a long strip-shaped steel sheet, pressing the steel sheet from above and below by a die while pulling out the steel sheet, the both side edges of the steel sheet in the same direction along the longitudinal direction By performing a drawing process to bend the steel plate, a first laterally extending portion extending from the upper end edge of the base portion to one side with the substantially central portion of the steel plate as a base portion, and a first side extension portion extending from the lower end edge of the base portion A drawing step of forming a second side extension extending in the same direction opposite to the side extension, and the steel sheet drawn through the drawing step corresponds to the entire length of the frame body. A cutting step of cutting into a predetermined length to form a rod-shaped frame material,
A bending step of bending the frame material in a direction in which both ends of the frame material come into contact with each other, and a first joining step of joining both ends of the frame material in contact with each other by the bending step to form an annular frame; A second joining step of joining the claw member to a predetermined position of the frame body.

According to a first aspect of the method of the present invention, the drawing step is performed while pulling out the steel sheet from the coil, and a rod-shaped frame material having a predetermined length is formed by the cutting step. In the present invention, a steel plate is used as a material. As a result, the wire drawing can be omitted as in the conventional method using a wire, and the first side extension portion and the second side extension can be easily formed on the steel sheet by the drawing process. Since the extended portion can be formed, a large-scale processing machine for wire drawing and a plurality of rolling processes is not required without performing a plurality of rolling processes as in the related art, and costs can be reduced.

Further, according to the first aspect, since the drawing process and the cutting process can be continuously performed while pulling out and feeding the long steel plate, the frame material is formed through the drawing process on the steel plate. This makes it possible to perform a series of operations, such as performing a task, extremely efficiently.

Further, a second aspect of the method for producing a virtue of the present invention is that the steel sheet is drawn out of a coil formed by winding a long strip-shaped steel sheet and cut into a predetermined length corresponding to the entire length of the frame. And a drawing process of pressing a steel plate of a predetermined length cut in the cutting process from above and below by a die to bend both side edges of the steel plate in the same direction along the longitudinal direction. A first laterally extending portion extending from the upper end edge of the base portion to one side with a substantially central portion of the base portion as a base portion, and a same direction facing the first laterally extending portion from the lower end edge of the base portion. A drawing process for forming a frame material having a second laterally extending portion extending in a direction in which the frame material is bent in a direction in which both ends of the frame material come into contact with each other; The two ends of the frame material in contact with each other are joined to form an annular frame. A bonding step of, characterized in that it comprises a second bonding step of bonding said pawl member in a predetermined position of the frame body.

According to a second aspect of the method of the present invention, the steel sheet drawn from the coil is cut to a predetermined length in the cutting step, and the cut steel sheet is subjected to the drawing step. That is, in the second aspect, the working procedures of the drawing step and the cutting step in the first aspect are reversed. Thus, the drawing process on the steel plate in the drawing process is performed individually on a plurality of steel plates cut to a predetermined length. By doing so, for example, the die can be provided in an existing general-purpose press working machine to perform the drawing process, and the cost can be further reduced without providing a new dedicated working machine facility.

Further, in the drawing step in the first and second aspects of the production method of the present invention, the drawing is performed by pressing the steel sheet from above and below with the dies, so that the first steel sheet is subjected to the first drawing. A first vertical extension forming a lateral extension and the second lateral extension and simultaneously extending upwardly along a leading edge of the first lateral extension; And a second vertical extension integrally extending downward along a leading edge of the second lateral extension.

In the drawing step, the first laterally extending portion and the second laterally extending portion are formed on the steel sheet by the die, and at the same time, the first vertically extending portion and the second laterally extending portion are formed. Can be formed. Thereby, each extension part is formed by the drawing process of one behavior by the die, and the frame body can be formed in a shape with higher strength without increasing the number of steps.

Preferably, the steel sheet is a hot-rolled steel sheet. A hot-rolled steel plate (SPHC) is more easily available and cheaper than a wire rod (SWRM) used as a material of a conventional frame, and is easily drawn in the drawing step. In the present invention, a frame material having sufficient strength can be formed by forming the laterally extending portions and the vertically extending portions on the steel sheet,
The cost can be further reduced by adopting a lightweight hot-rolled steel plate that is relatively easy to process.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing one embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1, FIG. FIG.
Is an explanatory view of a step following FIG. 3, FIG. 5 is an explanatory view of a partial step showing another embodiment of the manufacturing method of the present invention, and FIG. 6 is a longitudinal section showing another embodiment of the present invention. FIG.

In the embodiment shown in FIG. 1 of the present invention, a cooking tool such as a pot can be placed on two stove burners A (shown by phantom lines in FIG. 1) A of the system kitchen.

As shown in FIG. 1, the goto 1 comprises a plurality of claw members 2 and a frame 3 for connecting and supporting the claw members 2.

The frame 3 is formed in a substantially rectangular ring shape in a plan view corresponding to the shape of a stove mounting portion provided on a stove top of a system kitchen (not shown), and substantially at the center between two stove burners A. An auxiliary frame member 4 for supporting the claw member 2 is provided in series with the position.

The frame 3 is formed in an annular shape by a steel plate having a predetermined length, and has a flat base 5 as shown in a sectional view in FIG. A first laterally extending portion 6 extending inward in an annular shape and a first laterally extending portion extending upward from an inner peripheral edge of the first laterally extending portion 6 are provided at an upper end edge of the base portion 5. Vertical extension 7 of
Are integrally formed. In addition, the lower end of the base 5 has a second side extending portion 8 extending inward in an annular shape, and extends downward from the inner peripheral edge of the second side extending portion 8. The second vertical extension 9 is formed integrally.

As shown in FIG. 2, each claw member 2 has its base end 10 connected and fixed to the upper end of the frame 3 (and the auxiliary frame member 4) by welding. As shown in FIG. The ends are provided at predetermined intervals so as to extend in the direction in which the respective ends converge toward the inside of the annular frame 3.

With the above configuration, Goto 1 of the present embodiment is as follows.
As shown in FIG. 2, the frame body 3 is connected to each of the side extension portions 6, 8.
And the vertical extension portions 7 and 9 to provide the frame 3
Even if the thickness dimension y of is smaller than the thickness dimension x of the conventional gorgeous frame 3 (see FIG. 7), a sufficient strain strength can be obtained.

[0030] Here, FIG.
Table 1 shows the displacement (strain amount) with respect to the load obtained by a comparison test with the conventional pentagon provided with the frame 3 having the shape shown in FIG. In the comparative test, referring to FIG. 1, both sides of the frame 3 are placed on the measurement block B (shown by phantom lines), and a substantially central position C ( A load is applied to the auxiliary frame member 4) indicated by a virtual line, and an arrow D
The amount of distortion (mm) at the position indicated by was measured. Note that the thickness dimension y of the frame 3 of the present embodiment adopted in this test is 2.
9 mm, the height z is 12 mm, the thickness x of the conventional frame 3 is 4 mm, and the height w is 11 mm.

[0031]

[Table 1]

As shown in Table 1, when a load of, for example, 10 kg is applied, the amount of distortion of the conventional frame 3 is 2.02 mm, whereas the amount of distortion of the frame 3 of the present embodiment is 1 mm. .
It is 81 mm, and it is clear that the strain strength is improved by about 10% as compared with the related art. As a result, when obtaining the same strain strength as that of the related art, the thickness dimension y of the frame 3 can be further reduced, and thus the weight 1 can be dramatically reduced. In the comparative test, the second moment of area was obtained as an index of the compressive load resistance for each of the cross-sectional shape of the conventional frame 3 and the cross-sectional shape of the frame 3 of the present embodiment. The value of 3 is 35
In contrast to 5.5, the value of the frame 3 of the present embodiment is 39.
8.5, which clearly indicates that the pressure resistance of the present embodiment has been improved as compared with the related art.

Next, a description will be given of a method of manufacturing Gotoku 1 employing the frame 3. In the present embodiment, a hot-rolled steel plate (SPHC) 1 wound in a coil shape shown in FIG.
1 as a material. The hot-rolled steel sheet 11 is easily available and inexpensive as compared with a wire (SWRM) used as a material of a conventional frame, and is a sheet material, so that forming such as drawing is easy.

As shown in FIG. 3, in the present embodiment,
The steel plate 11 is pulled out from the coil 12 and is conveyed along the conveyance path E. The rod-shaped frame body having a predetermined length is drawn by the roll forming device 13 for drawing and the cutting device 14 provided along the conveyance path E. The material 15 is formed. That is, the coil 1
First, the first and second roller levelers 16 and 17 remove the bending of the upper and lower surfaces and both side edges of the steel sheet 11 drawn from the second steel plate 11, and correct the flatness. Next, the steel sheet 11 is subjected to a drawing step by the roll forming apparatus 13 having the drawing roll 18. In the drawing process, the pair of side extending portions 6 and 8 and the pair of vertical extending portions 7 and 9 are formed with the substantially central portion of the steel plate 11 as the base 5 (see FIG. 2). .

On the downstream side of the roll forming device 13, the steel plate 11 is cut by the cutting device 14 into a predetermined length corresponding to the entire length of the frame 3 through a twist correcting process by the straightening device 19. A cutting step is performed. Thereby, as shown in FIG. 4A, a rod-shaped frame material 15 having a predetermined length is formed.

Subsequently, as shown in FIG. 4B, both ends of the frame material 15 are bent at right angles, and then, as shown in FIG. A bending step of bending in a contact direction is performed.

Next, as shown in FIG. 4D, a first joining step of welding and joining both ends of the frame body material 15 which is in contact with each other is performed. The weld 2 formed at this time is
As shown in FIG. 4E, 0 is flattened by pressing from above and below to form an annular frame 3 (see FIG. 1).

Although not shown, the auxiliary frame member 4 and the plurality of claw members 2 are integrally provided at predetermined positions of the frame body 3 by welding with reference to FIGS. Is done.

As described above, in the present embodiment, the drawing process and the cutting process can be performed continuously while the long steel plate 11 is pulled out from the coil 12 and sent.
The operation of forming the frame material 15 can be performed extremely efficiently continuously.

Next, another embodiment of the method of manufacturing the virtues 1 employing the frame 3 will be described. As shown in FIG. 5, in the other embodiment, the coil 12 is
(The above-described hot-rolled steel sheet) is drawn out, and a cutting step of forming a steel sheet 11 having a predetermined length corresponding to the entire length of the frame 3 is performed by a cutting device 21 provided on the downstream side.

Next, the steel plate 11 having a predetermined length cut by the cutting device 21 is pressed from above and below by a die (not shown) of a press device 22 provided on the downstream side to perform a drawing forming step. In the draw forming step, as described above, a pair of side extending portions 6 and 8 and a pair of vertical extending portions 7 and 9 are formed on the steel sheet 11, thereby forming the frame material 15. . The following steps are as shown in FIG. According to the other embodiment,
Unlike the embodiment described above, the drawing process on the steel plate 11 in the drawing process is performed individually for each of the plurality of steel plates 11 cut to a predetermined length. A general-purpose press machine can be adopted, and the production cost can be reduced without providing a new dedicated machine tool.

In this embodiment, the frame 3
As shown in FIG. 2, the strain strength and the pressure resistance were improved by forming a pair of laterally extending portions 6 and 8 and a pair of vertically extending portions 7 and 9. As with the other frame 23 shown in FIG. 6, even if only a pair of laterally extending portions 6 and 8 are provided at the upper and lower edges of the base 5, sufficient strain strength and pressure resistance can be obtained. it can. Needless to say, the frame body 23 can be easily and inexpensively manufactured by the above-described manufacturing method.

[Brief description of the drawings]

FIG. 1 is a plan view showing one embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is an explanatory view of some steps showing one embodiment of the manufacturing method of the present invention.

FIG. 4 is an explanatory view of a step following FIG. 3;

FIG. 5 is an explanatory view of some steps showing another embodiment of the manufacturing method of the present invention.

FIG. 6 is a longitudinal sectional view showing a main part of another embodiment of Gotoku of the present invention.

FIG. 7 is a longitudinal sectional view showing a main part of a conventional gotoku.

[Explanation of symbols]

1: Gotoku, 2: Claw member, 3, 23: Frame, 5: Base, 6
... first lateral extension, 7 ... first vertical extension, 8 ... second
9 ... Second vertical extension, 11 ... Steel plate, 1
2 ... coil, 18 ... drawing roll (die), 15 ...
Frame material.

Claims (6)

[Claims] 1. A method comprising: a plurality of claw members on which cooking utensils are placed; and a frame body for integrally supporting each claw member, wherein the frame body has an annular base and an upper end of the base. A first lateral extension extending to one side from the edge, and a second lateral extension extending in the same direction from the lower end edge of the base in opposition to the first lateral extension. Goku is characterized by being formed in a substantially U-shaped cross-section by the parts. 2. A frame according to claim 1, wherein said frame has a first vertical extension integrally extending along a leading edge of said first lateral extension and said second lateral extension. 2. A virtue according to claim 1, further comprising a second vertical extension portion integrally extending downward along a leading edge of the portion. 3. A method of manufacturing a virtue comprising a plurality of claw members on which cooking utensils are placed, and an annular frame body integrally supporting each claw member, wherein a long strip-shaped steel plate is wound. From the coil formed by turning, the steel sheet is drawn out while pressing the steel sheet from above and below by a die, and both side edges of the steel sheet are bent in the same direction along the longitudinal direction. A first laterally extending portion extending from the upper edge of the base to one side and a first laterally extending portion extending in the same direction from the lower edge of the base as a base Drawing step of forming a second laterally extending portion to be formed; and cutting the steel sheet drawn through the drawing step into a predetermined length corresponding to the entire length of the frame body to form a rod-shaped frame material. A cutting step of forming; and a bending step of bending the frame material in a direction in which both ends of the frame material come into contact with each other. A first joining step of joining both ends of the frame material abutted to each other by the bending step to form an annular frame; and a second joining step of joining the claw member to a predetermined position of the frame. And a method for producing Gotoku. 4. A method for manufacturing a sword comprising a plurality of claw members on which cooking utensils are placed, and an annular frame body integrally supporting the claw members, wherein a long strip-shaped steel plate is wound. A cutting step of extracting the steel sheet from the coil formed by turning and cutting the steel sheet into a predetermined length corresponding to the entire length of the frame, and pressing the steel sheet of the predetermined length cut in the cutting step from above and below by a die. By performing drawing work in which both side edges of the steel sheet are bent in the same direction along the longitudinal direction, a first lateral extension extending from the upper edge of the base to one side with the substantially central portion of the steel sheet as the base. A drawing process for forming a frame material including a projection and a second side extension extending in the same direction from the lower edge of the base in opposition to the first side extension, A bending step of bending the frame material in a direction in which both ends thereof come into contact with each other; Accordingly, the method includes a first joining step of joining both ends of the frame material that has come into contact with each other to form an annular frame, and a second joining step of joining the claw member at a predetermined position of the frame. A method for producing Gotoku, characterized by the fact that: 5. In the drawing step, drawing is performed by pressing the steel sheet from above and below with the die, so that the first laterally extending portion and the second laterally extending part are formed on the steel sheet. A first vertical extension integrally extending upward along a leading edge of the first side extension; and a second vertical extension forming the second side extension. The method according to claim 3, further comprising forming a second vertically extending portion integrally extending downward along the leading edge. 6. The method according to claim 3, wherein the steel sheet is a hot-rolled steel sheet.