Cutting knife of chestnut cutting machine

Abstract

To solve the problem that in a machine for half-cutting a chestnut as it is covered with an outer skin, a plurality of cutting knifes, which are formed of a flat plate with a thickness of approximately 2 millimeters and are formed into disc shapes, have the outer peripheral part sharpened into a taper shape and are called a circular blade, are provided side by side at predetermined intervals, the outer skin of the chestnut surface is extremely hard, when the circular blade is cut into the outer skin, the circular blade is occasionally deformed in a traverse direction, is brought into contact with a chestnut receiving member provided on both sides of the circular blade while holding a fine gap between both sides of the circular blade, and occasionally damages the chestnut receiving member and the circular blade is occasionally damaged.SOLUTION: The thickness of a central part of a circular cutting blade is set to be thicker than a conventional blade, an outer peripheral part having the same thickness as that of the conventional blade is provided outside the central part, and a cutting knife which is less likely to be deformed is formed by sharpening the outer edge.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a chestnut cutter blade used to cut chestnuts in half. [Background technology]

[0002] A conventional machine for continuously halving chestnuts is disclosed in Patent No. 5129765 (see Patent Document 1). This chestnut slicer is a disk-shaped machine that continuously rotates in a vertical plane. It has a number of chestnut-receiving turntables arranged at regular intervals on its outer periphery, each with a number of recessed pockets for storing chestnuts before halving. A circular blade that fits into the pockets rotates at high speed. The chestnut-receiving turntables have narrow grooves that lead to the pockets, and a thin circular blade is placed in the groove. These chestnut-receiving turntables are typically made of lightweight, soft aluminum. As the chestnut-receiving turntable with chestnuts stored in its pockets rotates continuously, the chestnuts are cut in half by the sharp cutting edge of a blade called a round blade that rotates in a groove on the outer surface of the chestnut-receiving turntable. The chestnuts cut in half by the blade fall freely from the pockets as the chestnut-receiving turntable rotates downward, and are transported to the next process by a conveyor installed below the chestnut-receiving turntable. The circular blade 21 used in this machine is generally called a round blade, and as shown in Figures 5 and 6, it consists of a circular flat plate with a thickness B of about 2 mm, and has a sharp cutting edge 22 that is tapered on the outside of the center indicated by the diameter F. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5129765 Summary of the Invention [Problem to be solved by the invention]

[0004] In the chestnut slicer described above, when the cutting edge of the blade cuts into the hard outer skin of a chestnut, the curved shape of the chestnut causes a lateral force to act on the cutting edge, deforming it and causing chipping, or it comes into contact with the inner surface of a narrow groove in the chestnut-receiving turntable, damaging the cutting edge or scratching the inner surface of the groove.When the cutting edge hits the inner surface of the groove in the chestnut-receiving turntable, which is made of a metal softer than the blade, it is scraped by the cutting edge, causing tiny metal pieces to peel off and fall off.These metal pieces adhere to the half-cut chestnuts and are transported to the next process, potentially causing the problem of foreign matter contamination.

[0005] This invention has been made to solve the drawbacks of the conventional art, and its purpose is to provide a blade that can suppress deformation of a thin circular blade to prevent damage to the cutting edge, prevent damage to the inner surface of the groove of the chestnut holder turntable, and prevent the problem of foreign matter being mixed in due to tiny metal pieces peeling off when the inner surface of the groove is scraped. [Means for solving the problem]

[0006] In order to achieve the above object, the cutter of the chestnut slicer according to the present invention has the following configuration: The central part of the circular cutter is thicker and the outer part is thinner than the central part, forming a sharp tapered cutting edge on the outer periphery. The invention described in claim 1 is This blade is made by forming the outer periphery of a circular thin flat plate into a tapered shape and providing a sharp cutting edge on the outer edge, and the thickness of the central part near the axis is made thicker than the thickness of the outer periphery.

[0007] In the above invention, the blade is formed so that its central portion is thicker than its outer periphery, so that even if a lateral force acts on the cutting edge when cutting the chestnut in half, the cutting edge is less likely to deform, and damage to the cutting edge or the inner surface of the groove due to contact with the inner surface of the groove is prevented. [Effects of the Invention]

[0008] According to this invention, damage to the blade due to deformation is suppressed, thereby extending the life of the blade and preventing damage to the inner surface of the groove of the chestnut receiving turntable. A longer blade life means less blade replacement effort, leading to reduced running costs. Furthermore, if the metal comes into contact with the inner surface of the groove of the chestnut-receiving turntable that holds the chestnuts and scratches the inner surface, tiny metal fragments that are generated may remain attached to the half-cut chestnuts and be transported to the next process, causing problems such as foreign matter contamination; however, this invention solves this problem. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a front view of an embodiment of the present invention. [Figure 2] 1 is an enlarged side view of a portion of an embodiment of the present invention; [Figure 3] 1 is a plan view of a machine in which the blade of the present invention is used; [Figure 4] 1 is a side view of a machine in which the blade of the present invention is used. [Figure 5] 1 is a front view of a conventional blade. [Figure 6] FIG. 1 is a partially enlarged side view of a conventional blade. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, the form of the cutting tool of the chestnut cutter according to the present invention will be described with reference to the drawings. [Example]

[0011] 1 and 2 show an embodiment of the present invention, FIGS. 3 and 4 show the main parts of a chestnut cutter, and FIGS. 5 and 6 show a conventional cutter.

[0012] The circular blade 1 has a shaft hole 3 formed at the center of the central portion 2 for inserting a rotating shaft. The thickness of the blade is A millimeters up to a predetermined range outside the shaft hole 3 (the range indicated by diameter D), and the thickness of the blade outside that range (the range indicated by dimension E) is B millimeters. The relationship between A and B is A>B, and the central portion 2 (the range indicated by the diameter D) is formed to be thicker than the outer peripheral portion 4 (the range indicated by the dimension E). In Figure 1, (D+E+E) is F1, which is formed to be approximately the same size as F of a conventional cutting tool. The outside of the outer periphery (range indicated by dimension E) of plate thickness B millimeters is ground into a tapered shape on both sides, forming a sharp cutting edge 5 on the outer periphery. As shown in Figure 3, multiple blades 1 are attached to a single shaft 7 at predetermined intervals with spacers 6 in between, and the cutting edges 5 are arranged to fit into grooves 10 in a chestnut-receiving turntable 9, which has multiple equally spaced pockets 8 on its outer periphery for storing chestnuts W. The chestnut-receiving turntables 9 are attached to shafts 11 in numbers corresponding to the number of blades 1. Shaft 7 is rotatably supported by bearings 14 and shaft 11 by bearings 15, and a spur gear 12 is fixed to the end of shaft 7, and a sprocket 13 is fixed to the end of shaft 11, and these are linked to a drive source. The shaft 7 to which the blade 1 is attached is set to rotate at a higher speed than the shaft 11 to which the chestnut receiving turntable 9 is attached. In Figure 4, when chestnuts W are intermittently supplied from above to pocket 8 of chestnut receiving turntable 9, chestnut receiving turntable 9 rotates in the direction of arrow X (clockwise), while blade 1 rotates in the direction of arrow Y (counterclockwise), so that as chestnuts W contained in pocket 8 rotate as chestnut receiving turntable 9 rotates, they are cut in half by blade 1 which rotates at high speed. The half-cut chestnuts W move downward as the chestnut receiving turntable 9 rotates and fall freely from the pocket 8. The dropped chestnuts W are transported to the next process by a conveyor (not shown) arranged below the chestnut receiving turntable 9.

[0013] In the blade 1 configured as described above, only the tapered portion is formed thin as in the conventional case, so there is no problem in cutting into the chestnuts W, while the central portion 2 of the blade 1 is formed thicker than the outer peripheral portion 4, so even if a large force acts laterally on the cutting edge 5 when cutting the chestnuts W in half, it is less likely to deform, preventing the conventional drawback of contact with the inner surface of the groove 10. This eliminates the risk of the cutting edge being damaged or the inner surface of the groove 10 being scratched, causing tiny metal fragments to fall off and adhere to the cut chestnuts W, which are then transported to the next process, resulting in the problem of foreign matter contamination. [Explanation of symbols]

[0014] 1. Blade 2. Center of blade 4. Cutting edge 5. Cutting edge 8 pockets 9. Chestnut holder turntable 10...Groove A: Plate thickness at center B: Thickness of outer periphery

Claims

[Claim 1] A disk-shaped blade made of a thin flat plate, the outer periphery of which is tapered to form a sharp cutting edge on the outer periphery, This is a chestnut cutting tool characterized in that the thickness of the inner peripheral portion is formed thicker than the thickness of the outer peripheral portion.

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