Light-weight tongues that are hardly twisted

Abstract

To provide light-weight and sturdy tongues whose tip gripping part is hardly twisted.SOLUTION: Tongues are characterized in that the rigidity is enhanced by joining a steel pipe of 0.8-1.5 mm in wall thickness to the principal part, and the tip of the tongues integrally molded with a thin plate of 1.5 mm or less is hardly twisted.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to tongs for handling foodstuffs and the like.

Background Art

[0002] Conventionally, tongs are formed by combining a corrosion-resistant material such as stainless steel or resin with a leaf spring or coil spring made of stainless steel or resin having spring properties for opening and closing the gripping portion at the tip of the tongs.

[0003] Tongs formed by combining a tong body and a spring are composed of a plurality of parts, so there is a risk of parts falling off. When used for food processing, there is a problem that parts that have fallen off are mixed into the food.

[0004] In order to avoid parts falling off, there is a method of integrally forming the tong body and the spring with stainless steel or the like. However, in this method, it is necessary to use a material with a thickness exceeding 1.5 mm in order to suppress the twisting of the tongs, and there is a problem that the mass of the tongs increases. In addition, in order to ensure appropriate spring strength and durability, it involves a complicated manufacturing method such as performing cold rolling partially.

[0005] In order to reduce the weight of the tongs, if the tongs are integrally molded with a thin plate of 1.5 mm or less, the rigidity of the main part is low, and there is a problem that the tongs cannot grip well even if the tip gripping portion of the tongs is twisted. There are measures to suppress the twisting of the tip gripping portion of the tongs by making it a split type or to reduce the influence of twisting by widening the width of the tip gripping portion of the tongs.

[0006] When picking up small items, it is necessary to make the tip gripping portion of the tongs thin. For this purpose, it is necessary to minimize the twisting of the tip gripping portion of the tongs. There are few tongs that are lightweight, break-resistant, and have a simple structure that can meet this requirement.

Prior Art Documents

Patent Documents

Patent Documents

Non-Patent Literature

Summary of the Invention

Problems to be Solved by the Invention

[0007] The problem to be solved by the present invention is to provide a tongs that is lightweight, robust, has a tip gripping part that is difficult to twist, and is easy to grip non-handleable objects.

[0008] For weight reduction, in the case of tongs integrally formed of a stainless steel thin plate with a thickness of 1.5 mm or less, the rigidity of the main part is low, and a problem occurs in that the tip gripping part of the tongs twists and cannot grip the object well.

[0009] The present invention is integrally formed of a metal plate of 1.5 mm or less, and aims to provide a tongs that is lightweight, robust, has a simple manufacturing method, increases the rigidity of the main part, suppresses the twisting of the tong tip gripping part, and is easy to grip even when the shape of the tip gripping part is made thin.

Means for Solving the Problems

[0010] The present invention is made to solve the above problems, and is characterized in that the twisting of the tip gripping part of the tongs integrally formed of a thin plate of 1.5 mm or less is increased in rigidity by joining a steel pipe with a wall thickness of 0.8 mm to 1.5 mm to the main part.

[0011] By joining a steel pipe to the main part, when gripping an object with the tongs, the distance between the main parts does not fluctuate, the movement of the fingers can be accurately transmitted to the tip gripping part of the tongs, and by increasing the rigidity of the main part, the twisting of the tip gripping part of the tongs is suppressed, and problems such as the gripped object falling or the gripping becoming unstable can be reduced.

[0012] The metal forming the tongs preferably has a proof stress of 200 N / mm 2 or more and a corrosion resistance index of Cr + 3.3 × Mo + 30 × Ni - Mn (all chemical symbols are mass percentage values) of 17% or more, and is formed of spring stainless steel or duplex stainless steel.

[0013] In addition, in order to enable magnetic separation in the event that the tong piece gets mixed into food, a tong formed of a magnetic duplex stainless steel or the like is preferable.

[0014] When the tong is held in the palm of the hand for use, the width of the gripping portion is 15 mm to 22 mm, and the sum of the outer diameter of the steel pipe joined to the main part and the width of the gripping portion is 35 mm to 55 mm. When the tong is used by being sandwiched between the thumb and the index finger like chopsticks, it is preferable that the width of the gripping portion is 6 mm to 12 mm and the outer diameter of the steel pipe joined to the main part is in the range of 20 mm to 35 mm.

[0015] The shape of the tip gripping portion of the tong can be appropriately selected according to the object to be gripped. Since the twist of the tip gripping portion of the tong is suppressed, the tip gripping portion can be made thinner to facilitate handling of small objects.

[0016] The manufacturing method of the tong according to the present invention is such that a metal plate having a yield strength of 200 N / mm 2 or more and a thickness of 1.5 mm or less is formed by press molding or the like and then a steel pipe is joined to the main part, and the tong can be manufactured by a simple manufacturing method.

Advantages of the Invention

[0017] According to the tong of the present invention, it is possible to realize a durable tong that is lightweight, has little twist in the tip gripping portion and is easy to handle, and has little deformation of the gripping portion and little reduction in springiness due to long-term use.

[0018] Taking advantage of the feature of little twist in the tip gripping portion, the shape of the tip gripping portion is made thinner to enable handling of small objects, and it can be used like chopsticks.

[0019] In addition, with a simple integrated structure made of a high-strength metal and a strong joint such as welding for the steel pipe in the main part, it is possible to suppress the mixing of foreign substances into the handling object due to the loss or dropping of parts.

Brief Description of the Drawings

[0020]

Figure 1

[0021]

Figure 2

Mode for Carrying Out the Invention

[0022] FIG. 1 is a plan view and a front view of a long, thin tong with a narrow tip according to an embodiment of the present invention. By holding the grip portion 4 of the tong body 1 by hand and opening and closing the outer grip interval 9 with the fingers, the tip gripping portion 5 is opened and closed to grip non-handleable objects.

[0023]

[0024] As shown in FIGS. 1 and 2, the tongs of this embodiment are composed of a main body 1 integrally formed of a thin plate of 1.5 mm or less and a steel pipe 3 joined 6 to the main part 2.

[0025] In the type where the grip portion 4 is held by the palm as in the embodiment of FIG. 1, the width 8 of the grip portion is set to 15 mm to 22 mm, and the sum of the outer diameter 10 of the steel pipe joined to the main part 2 and the width 8 of the grip portion is set to 35 mm to 55 mm, so that the force of the fingers can be transmitted to the tip gripping portion 5 of the tongs without difficulty. Combined with the weight reduction of the tong body 1, the fatigue of the tong user can be reduced even during long-term use.

[0026]

[0027] ​​As in the embodiment of FIG. 2, in the type that uses the tongs by pinching the grip portion 4 with fingers like chopsticks, the width 8 of the grip portion is set to 6 mm to 12 mm, and the outer diameter 10 of the steel pipe joined to the main portion 2 is set to 20 mm to 35 mm, so that the force of the fingers can be transmitted to the tong tip gripping portion 5 without difficulty. Coupled with the weight reduction of the tong body 1, the fatigue of the tong user can be reduced even during long-term use.

[0028] Also, taking advantage of the feature that the tip gripping portion 5 of the tong is difficult to twist, even in the chopstick-shaped tong with a tong length 7 of about 295 mm as in the embodiment of FIG. 2, fine items can be easily handled.

[0029] When corrosion resistance is required, such as when handling foods containing salt, the tong body and the steel pipe are preferably formed of stainless steel with a pitting corrosion resistance index = Cr + 3.3×Mo + 30×Ni - Mn (all chemical symbols are mass percentage values) of 17% or more.

[0030] The tong body 1 and the steel pipe 3 may be made of a magnetic metal so that magnetic separation can be performed when the tongs are mixed in non-handled objects such as foods, or they can be stored on a wall surface or the like using a magnet.

Embodiment

[0031] In the embodiment shown in FIG. 1, when handling a food item weighing about 200 gf with a long tong with a tong length 7 of 395 mm, it was confirmed that the tong is easy to use because the tip does not twist and it is difficult to grip the food material, and the gripped food material does not fall.

Industrial Applicability

[0032] The tong according to the present invention can be applied to uses such as handling fine items with a long tong for deep-fried foods.

Explanation of Reference Numerals

[0033] 1 Body 2 Main Portion 3 Steel Pipe 4 Grip Portion 5 Tip gripping part 6 Joining 7 Tong length 8 Width of the gripping part 9 Distance between the outer sides of the gripping part 10 Outer diameter of the steel pipe

Claims

Claim 1 The endurance is 200 N / mm ２ A lightweight and twist-resistant tong that is integrally formed from a metal plate with a thickness of 1.5 mm or less and has a steel pipe joined to a key part to suppress twisting of the tong tip gripping part. Claim 2 The tongs according to claim 1, which are made of stainless steel with a pitting corrosion resistance index of Cr + 3.3×Mo + 30×Ni - Mn (the values of the component symbols are all mass percentage values of the contained components) of 17% or more and have excellent corrosion resistance. Claim 3 The tongs according to claim 1 or 2, wherein the width of the gripping portion for performing the opening and closing operation of the tong gripping portion is 15 mm to 22 mm, and the sum of the outer diameter of the steel pipe joined to the main part and the width of the gripping portion is 35 mm to 55 mm, or the width of the gripping portion is 6 mm to 12 mm and the outer diameter of the steel pipe joined to the main part is in the range of 20 mm to 35 mm.

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