JP2008061600A - Bulb vegetable processing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bulb vegetable processing machine having a root-extending part as a root arranging means which can surely hold and arrange roots of bulb vegetables and at the same time, peel off outer skin attaching to fruit parts more effectively. <P>SOLUTION: This bulb vegetable processing machine 1 has a transportation part 2 which transports bulb vegetables, a cutting part 3 which cuts the roots and leaves of the bulb vegetables, and a root-extending part 4 which nips and extends roots in front of the cutting part 3. The root-extending part 4 has a pair of rollers 26R and 26L, and a plurality of blades 41d, 41d... are set with one end as a free edge along the tangent line direction on the circumferential surface of the rollers 26R and 26L. The blades 41d, 41d... are made of an elastic member, and the length thereof is set almost the same or a little longer than the circumferential length of the rollers 26R and 26L. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a technique for a bulb vegetable preparation machine that cuts roots and leaves to a preset length with respect to harvested bulb vegetables such as onions. More specifically, the roots of the bulb vegetables are stretched before the cutting process, or the excess epidermis and the entangled root remnants attached to the main body (real part) are peeled off to adjust the state of the bulb vegetables. Related to the technology of the department.

Conventionally, in bulbous vegetables represented by onions, roots and leaves are trimmed to a predetermined length before being shipped as a product, and the bark attached to the main body (real part) is removed. There is known a bulb vegetable preparation machine that needs to be peeled off and neatly prepared, and this operation is automatically performed.
In order to keep the cutting state of the roots good, various mechanisms in the root extension part have been proposed in the bulb vegetable preparation machine.For example, the root is sandwiched between a pair of rollers, and the surface is brushed or the surface is brushed. There are some that use a pair of roll brushes to handle the roots and cut them with a rotary blade.

However, it has been difficult to keep the cutting state of the roots of bulbous vegetables good at the root cutting part provided with the root extension part composed of these structures.
In other words, in the structure of the root stretched part, the root is sandwiched between a pair of rollers and is torn up, so that the cutting position varies depending on the difference in the tensile strength of the root, and a pair of roll brushes and rotary blades are used. In the type that cuts after handling the root, the position of the rotary blade is structurally separated downward from the lower surface of the bulb vegetables, and therefore some cutting residue is generated.

In order to solve such a problem, “Patent Document 1” discloses a technique capable of accurately cutting the roots of bulbous vegetables at the root portion.
Japanese Patent No. 3378560

In the above-mentioned “Patent Document 1”, as a structure of the root extension part, a pair of rollers having a taper shape are arranged so that the cross-sectional area decreases along the conveying direction of the bulb vegetables and from the upstream side to the downstream side. The root cutting surface of the bulbous vegetables is excellent by arranging and providing a rotary blade for cutting the roots so that a part of the rotation area enters between the roller and the bulbous vegetables. Can be kept in.
That is, the roots of bulbous vegetables sandwiched between a pair of rollers are handled downward by the rotational drive of both rollers, and are cut and cut by a rotary blade close to the upper end of the rollers in this state. For this reason, the distance from the root to the cut portion is approximately the thickness of the rotary blade, and a good root cut surface can be maintained.

However, in order to securely grasp the root on the surface portion of the roller, a brush with a long bristle portion is provided, and the brush is sometimes entangled and deformed during the rotation of the roller. In some cases, the root-handling effect of bulbous vegetables was reduced. Further, the roots are entangled deeply into the brush portion, and the brush portion is stripped off as it is, so that it remains on the surface portion of the roller and causes deterioration in maintainability.
Furthermore, as described above, the roots are efficiently handled downward while being sandwiched between a pair of rollers, but after that, the function of holding the roots extended downward cannot be fully exhibited and reach the rotary blade. In some cases, the roots that have returned to the original state are also mixed, and the root cut portions may become uneven.

  In light of these problems, in the present invention, it is possible to reliably grasp and align the roots of bulbous vegetables, and at the same time, more effectively strip off the bark attached to the real part. It is an object to provide a bulb vegetable preparation machine equipped with a “root stretcher” as a possible root alignment means.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in Claim 1, the conveyance part which conveys bulb vegetables, the cutting part which cut | disconnects the root and leaf of this bulb vegetable, and the root extension part etc. which are stretched across a root in front of this cutting part, etc. A root vegetable preparation machine comprising a pair of rollers, a plurality of blades along the tangential direction on the outer peripheral surface of the roller, with one end as a free end, The blade is formed of an elastic member, and the length thereof is set to be substantially the same as the outer peripheral length of the roller or somewhat longer.

  In Claim 2, the said blade | wing is provided in strip shape along the axial direction of the said roller.

  According to a third aspect of the present invention, the diameter of the pair of rollers is made as small as possible compared with the average diameter of the bulb vegetables.

  As effects of the present invention, the following effects can be obtained.

In claim 1, by providing a plurality of blades along the tangential direction on the outer peripheral portion of the roller, with one end as a free end, the blades extend in the tangential direction while the roller rotates once. It is possible to alternately repeat the state where the roller is wound around the peripheral surface.
That is, in a state where the blades are extended in the tangential direction, the main body of the bulb vegetable can be surely wrapped, and extra epidermis adhered to the surface of the main body, entangled root debris, and the like can be captured. Then, the blades are wound around the surface of the roller along with the rotation of the roller, so that excess epidermis, root debris, and the like can be reliably separated.
In addition, the blade is formed by an elastic member, and by setting the length thereof to be substantially the same as or slightly longer than the outer peripheral length of the roller, the tip of the blade wound around the roller is attached to the roller. The excess epidermis and root debris once captured can be reliably separated from the main body of the bulbous vegetables without being separated during the rotation of the roller.

  In Claim 2, by providing the said blade | wing in strip shape along the axial direction of the said roller, while a bulb vegetable grows a main part with several blade | wings, extending a root below, roller axial direction Therefore, it can be sent to the cutting section in a reliable state without accompanying extraneous skin or root debris to the main body.

  In claim 3, since the diameter of the pair of rollers is made as small as possible compared to the average diameter of the bulb vegetables, the point where the rollers sandwich the roots of the bulb vegetables, that is, where the pair of rollers are adjacent to each other , The distance from the bulbous vegetables to the bottom of the bulbs is shortened, and the roots can be surely grasped and extended downward.

Next, embodiments of the invention will be described.
FIG. 1 is a front view showing an overall configuration of a bulb vegetable preparation machine according to an embodiment of the present invention.
FIG. 2 is also a side view.
3 is a cross-sectional side view as seen from the arrow A shown in FIG.
4 is a cross-sectional plan view as seen from the arrow B shown in FIG.
FIG. 5 is a front view showing a root extending portion in the present invention.
FIG. 6 is also a plan view.
FIG. 7 is a front view showing the relationship between the roller and bulbous vegetables (onion).
FIG. 8 is a front view showing the operation of the roller.

[Bulb vegetable preparation machine 1 overall configuration]
First, the whole structure of the bulb vegetable preparation machine 1 in a present Example is demonstrated using FIG. 1 thru | or FIG. The direction represented by the arrow C in FIGS. 2 to 4 indicates the direction in which the bulb vegetables are transported, and the left and right directions are determined with the direction of the arrow C as the front for convenience.
In the present embodiment, onions are selected as bulb vegetables and will be described below. However, the present invention is not limited to this, and it may be a green onion, a potato or the like.

The bulb vegetable preparation machine 1 includes a main body portion 55 that prepares bulb vegetables, for example, onion 6, and a support frame portion 56 that is provided below the main body portion 55.
The main body 55 includes a transport unit 2 that transports the onion 6, a cutting unit 3 that cuts the roots and leaves of the onion 6, a root extending unit 4 that stretches across the root in the upstream part of the cutting unit 3, and the like. These components 2, 3, 4 and the like are covered with a substantially rectangular parallelepiped cover 57.

In the side view, the cover 57 is formed such that one side of the upper and lower sides (front side in the present embodiment) is horizontally formed, and the other side (rear side in the present embodiment) extends obliquely upward from a substantially central portion of the front and rear. It is formed in accordance with the shape of the transport unit 2 described later.
Further, the front and rear portions of the cover 57 are provided with a rectangular transport hole 57a at the substantially upper center portion, and a space between the front and rear transport holes 57a is formed as a transport passage. The material is introduced into the main body 55 from the transport hole 57a. A conveyance groove that allows the leaf portion of the onion to pass through is formed in the upper center of the conveyance hole 57a.

A plate 50 whose left and right ends are inclined obliquely downward when viewed from the front is provided at the rear portion (downstream side) of the main body portion 55, and is fixed to the inner surface of the side portion of the cover 57 at both ends. .
Further, a discharge hole 54 is provided in the side surface portion of the cover 57 in the vicinity where the plate 50 is fixed, and the onion 6 from which the roots and leaves are cut is carried out of the discharge hole 54 to the outside. .

  The support frame portion 56 has two pipe-like leg members 56a and 56a bent in a substantially reverse “U-shape” when viewed from the front, and are fixed to the lower portions of the front and rear ends of the main body portion 55, and the leg member 56a. -It is comprised by connecting between 56a with a connecting material etc. Wheels 58, 58, 58, 58 for movement are provided at the lower ends of the leg members 56 a, 56 a, and the front (upstream) leg member 56 a has an inverted “U” in front view. A handle 59 bent to “L” in side view is provided. With such a configuration, the bulb vegetable preparation machine 1 can be arbitrarily moved.

[Conveyor 2]
The transport unit 2 includes an endless transport belt 7 made of an elastic member, a power transmission mechanism 12 that transmits power to the transport belt 7, and the like. The conveyor belts 7 and 7 are arranged adjacent to each other on both the left and right sides, and the onion 6 is held and conveyed by sandwiching leaves between the conveyor belts 7 and 7.

The conveyor belt 7 is provided substantially at the center of the left and right center of the bulb vegetable preparation machine 1 and is once extended in the horizontal direction toward the downstream side, that is, the arrow C side shown in FIG. Is extended obliquely upward through an idler 11 at the front and rear central portions.
That is, the drive shaft 9 is provided upright on the upper part (left side in the figure) of the bulb vegetable preparation machine 1 and the upper part (right side in the figure) on the downstream side is compared with the drive shaft 9. The driven shaft 10 is erected in an oblique direction (slope) at a somewhat higher position. Via the drive shaft 9, the driven shaft 10, and the idler 11 disposed at such positions, the conveyor belt 7 is suspended in a “he” shape in a side view.

A transport pulley 9a for winding the transport belt 7 is provided at the upper part of the drive shaft 9, and a drive pulley 9b for transmitting drive is provided at the lower part.
Here, a power transmission mechanism 12 is provided at a substantially vertical center of the downstream portion of the bulb vegetable preparation machine 1, and the power transmission mechanism 12 rotatably supports the transmission shaft 12b in the vertical direction. A pulley 12a is fixed to the upper portion of 12b, and a driving belt 8 is wound between the pulley 12a and the driving pulley 9b.

  In the present embodiment, a V-belt is assumed as the driving belt 8, but the present invention is not limited to this. For example, a timing belt or a driving chain may be used, and a plurality of gears may be used. The transmission mechanism may be configured.

  Further, a sprocket 12c is fixed to the lower portion of the transmission shaft 12b, and a chain is wound between the sprocket 12c and a sprocket fixed on the second shaft 24 of the speed reduction mechanism 22 to be described later. Further, transmission is possible, and linked to the drive motor 13 via a transmission shaft or the like.

With such a structure, the conveyor belts 7 and 7 are rotated in opposite directions to each other via the independent power transmission mechanisms 12 and 12 to convey the onion 6 as described above.
During this transport, the onion 6 is stretched downward by the root stretcher 4 (to be described later) while the leaves are sandwiched by the transport belts 7 and 7, and after the root is cut, Since the belts 7 and 7 are conveyed while being suspended obliquely upward, the leaves are stretched by the weight of the onion 6, and as a result, the leaves are cut at an accurate position.

  After that, as described above, the main body (real part) of the onion 6 from which the leaves have been cut falls to the upper surface of the plate 50, rolls down due to the inclination angle of the plate 50, and is provided on the side surface of the cover 57. It is discharged to the outside through the discharge hole 54.

[Cutting part 3]
The cutting unit 3 includes a root cutting unit 16 that cuts the root of the onion 6 and a leaf cutting unit 17 that cuts leaves. That is, in the cutting part 3, a root cutting part 16 and a leaf cutting part 17 are arranged in order from the vicinity of the exit of the root extension part 4 to be described later toward the downstream part, and the onion 6 is conveyed by the conveying belt 7, The roots and leaves are automatically cut.

[Root cutting part 16]
The root cutting part 16 is formed by a rotary blade 18, a fixed blade 19, etc., and is provided above the rear part of rollers 26 </ b> R and 26 </ b> L provided in the root extension part 4 described later.
That is, in FIG. 4, the rotary blade 18 is provided horizontally in the side view in the side of the onion 6 in the conveying direction on the right side (the lower side in FIG. 4) of the roller 26R, and in the onion 6 conveying direction. A fixed blade 19 that partially overlaps the lower portion of the rotary blade 18 is provided obliquely downward in a side view above the downstream end of the roller 26L on the left side (upper side in FIG. 4).

  Here, the upstream side of the right side surface portion of the fixed blade 19 is gently inclined toward the outside (upper side in FIG. 4) in plan view, and the rotary blade 18 is gradually contoured with respect to the fixed blade 19. Since the lines are arranged so as to approach each other, in the plan view, the gap formed by the double-edged blades 18 and 19 is narrowed in the downstream direction, and the root of the onion 6 being conveyed can be easily inserted into the gap of the double-edged blade. It is possible to guide.

A sprocket 21 is fixed to the lower portion of the drive shaft 20 of the rotary blade 18, and is linked to the drive motor 13 through a speed reduction mechanism 22.
Here, the speed reduction mechanism 22 includes a first shaft 23 disposed in parallel to the output shaft above the drive motor 13, a second shaft 24 provided upright behind the first shaft 23, a sprocket fixed on each shaft, The driving force generated by the drive motor 13 is transmitted to the rotary blade 18, the conveying device, and the like via the speed reduction mechanism 22.

  That is, a sprocket 25 is fixed on the upstream end portion of the first shaft 23, and an output sprocket 14 is fixed on the output shaft protruding forward from the drive motor 13, and the rollers 26R and 26L Sprockets 44 and 44 are fixed on the front ends, respectively, and the drive chain 15 is wound around these sprockets so that they can be driven. Further, a bevel gear 28 is provided at the downstream end portion of the first shaft 23, and power is transmitted by meshing with a bevel gear 29 provided at a substantially vertical center portion of the second shaft 24. .

  An upper sprocket 30 and a lower sprocket 31 are provided at the upper and lower ends of the second shaft 24, and the power is transmitted to the lower sprocket 31 and the sprocket 21 via the drive chain 33, and the drive motor 13 A driving force is transmitted to the rotary blade 18.

  As will be described later, the upper sprocket 30 is connected to the rotary blade 34 of the leaf cutting portion 17 via a drive chain 32 and the like, and the rotary blades 18 and 34 are rotated in synchronization.

[Leaf cutting part 17]
The leaf cutting part 17 is provided with a rotary blade 34, and a sprocket 36 is provided above the rotary blade 34 so as to share a shaft 35. The rotary blade 34 is provided in a straight line in a downstream direction with respect to the rotary blade 18 of the root cutting portion 16 in a plan view, and the conveyance belt 7 changes its progress diagonally upward in a side view. It is installed horizontally at a slightly elevated height.

  The sprocket 36 is connected to the upper sprocket 30 provided on the second shaft 24 by a drive chain 32 through a plurality of idlers 37 and 38 in the middle, and the driving force generated by the drive motor 13 as described above is It is transmitted to the rotary blade 34 via the speed reduction mechanism 22.

[Root extension 4]
Next, the root stretcher 4 in the present embodiment will be described with reference to FIGS. 4, 6, and 7, the left-right direction is determined with the direction of arrow C, that is, the conveying direction of onion 6 as the forward direction, and in FIG. 5, the right side (each drawing) The upper left side is for the sake of convenience, and R (right side) and L (left side) are attached to the member code.

  The root stretcher 4 is disposed along the conveying direction of the onion 6 and is arranged in parallel in the front and rear horizontal direction, and the left and right rollers 26R and 26L, and the blade member 41R attached to the rollers 26R and 26L. -It consists of 41L etc.

  One end portion (front side) of the roller 26 is inserted into a bearing portion 43 fixed to the support member 42 and is rotatably supported, and a sprocket 44 is fixed to the tip portion thereof. As shown in FIG. 1, the drive chain 15 is wound around the output sprocket 14 of the drive motor 13 and the sprocket 25 of the speed reduction mechanism 22 so as to be driven.

  Here, in each of the rollers 26R and 26L provided adjacent to each other, the sprockets 44 and 44 that are fixed to the tip end portions are "taped", that is, the drive chain 15 is wound so that the rotation directions are opposite to each other. When the driving force of the driving motor 13 is transmitted, the rollers 26R and 26L are rotated so as to enter the adjacent sides. Further, since the sprockets 25 of the speed reduction mechanism 22 are connected together, the rotary blades 18 and 34 of the cutting unit 3 also rotate when the rollers 26R and 26L rotate.

  Thus, the roller 26 has a cantilevered support structure that is rotatably supported by the support member 42, and a plurality of blade members 41, 41 are arranged on one end of the outer peripheral surface along the tangential direction. It is provided as a free end.

  Here, the blade member 41 has a two-stage structure in which a sheet part 41a cut into a substantially rectangular shape and a foaming member 41b having the same shape as the sheet part 41a are overlapped, and one end part. Are fixed to the outer peripheral surface of the roller 26 in the tangential direction and the other end is a free end, and a plurality of strip-shaped blades 41d, 41d,. -Is formed.

  The blade member 41 is not limited to the two-stage structure of the sheet portion 41a and the foamable member 41b as shown in the present embodiment. For example, only the foamable member 41b is obtained by fluffing the surface portion. Alternatively, it may be configured by only the sheet portion 41a having a thickness and an elastic function.

  The sheet portion 41a is formed of a brushed fabric with a fluffed surface. As will be described later, when the root of the onion 6 is handled, the root is securely grasped and easily entangled. Can be removed.

  In this embodiment, two blade members 41 and 41 are provided for one roller 26, but the number and mounting position thereof are not limited and are arranged at equal angles on the outer periphery. It is desirable to do. Therefore, in the present embodiment, each is fixed in the diameter direction when viewed from the front.

  Further, each blade member 41, 41 is provided so that the sheet portion 41a faces the outside, and is fixed to the roller 26 so as to open outward in the direction opposite to the rotation direction of the roller 26. Has been. That is, in FIG. 5, since the rotation direction is counterclockwise in the roller 26L, the blade members 41 and 41 are fixed so as to be opened outward in the clockwise direction, and the rotation direction is clockwise in the roller 26R. Therefore, the blade members 41 and 41 are fixed so as to be opened outward in the counterclockwise direction.

A screw hole 45 is provided at the tip of the free end of the roller 26, and the tip roller 46 is screwed through the screw hole 45. However, the fixing method is not limited.
The tip roller 46 is composed of a cylindrical member having a slightly larger diameter than the roller 26, and is assembled coaxially with the roller 26.
Further, above the distal end portion of the distal end roller 46, the end portions of the fixed blade 19 and the rotary blade 18 provided in the root cutting portion 16 are disposed.

  The two rollers 26R and 26L are arranged on the same plane so that the side surfaces of the tip rollers 26 and 26 are adjacent to each other, and a slight gap is provided between the two rollers 26R and 26L. . The blades 41 and 41 provided on the respective rollers 26 are compressed while overlapping each other in the gaps, and the rollers 26R and 26L are rotated by the blade members 41 of the other roller 26 as a barrier. Operation is not hindered.

  Further, since the length of the blade member 41 is set to be substantially the same or somewhat longer than the outer peripheral length of the roller 26, the blades 41d, 41d,... The tip end portion overlaps with the attachment end portion, and the blade members 41 and 41 provided on both rollers 26R and 26L are always in pressure contact with the gap while overlapping each other.

  With such a configuration, the root stretcher 4 is disposed in the upstream part of the root cutting part 16, and the roots of the onion 6 conveyed from the upstream side (upper side in FIG. 6) Extraneous skins that are sandwiched between the gaps of the materials 41R and 41L, are aligned by being transported downstream (lower side in FIG. 6) while being handled in the downward direction, and are attached to the surface of the main body of the onion 6 at the same time The tangled root debris etc. are pulled apart.

That is, in FIG. 7, as shown in FIG. 7A, the blade member 41 securely wraps the main body portion of the thrown onion 6, and the blade member 41 is moved downward by the rotation of the roller 26, while the main body portion is moved downward. The excess epidermis and root debris attached to the skin are pulled away.
And as shown to (b), the blade | wing material 41 which slipped through the main-body part of the onion 6 grasps a root, and is extended below.

In the present embodiment, the blades 41d, 41d,... Positioned in the gaps between the rollers 26R and 26L are provided to face each other, but the present invention is not limited to this.
That is, in the plan view, the same number of blades 41d, 41d,... Provided on each of the rollers 26R, 26L are provided at the same interval and within the same range. Accordingly, the blades 41d and 41d facing each other overlap each other in the gap and are sandwiched between the rollers 26R and 26L.

  However, the arrangement of the blades 41d is not limited to this. For example, the blade 41d has a large thickness, and the number of blades 41d provided on both rollers 26R and 26L is one or more. They may be shifted from each other and reduced in size, and arranged in a “staggered” manner.

  Further, the method of attaching the blade 41d to the roller 26 is not limited to being provided in a direction perpendicular to the main axis of the roller 26 as in the present embodiment. The blade 41d may be provided so as to gently draw a spiral shape toward the downstream side.

  After passing through both the blade members 41R and 41L, the roots of the onion 6 are securely held in an aligned state by being sandwiched between the gap portions of the both end rollers 46R and 46L, and conveyed to the root cutting unit 16. To go.

Here, in this invention, it is set as the structure which can grasp | ascertain a root reliably and can handle below by providing the diameter size of each roller 26 and 26 as small as possible compared with the average diameter of the onion 6 main-body part.
That is, as shown in FIG. 8 (A), the diameter of the rollers 51 and 51 provided in the conventional root stretcher 4 is larger than the average diameter of the main body of bulbous vegetables to be prepared such as onion 6 and the like. It has been configured with the same or larger value. Therefore, when both rollers 51 and 51 are arranged adjacent to each other on the same plane, the adjacent portion 52 is greatly separated from the lower surface of the onion 6 to be conveyed, and the dimension of “H1” shown in the drawing is increased. Moreover, the space | interval in the upper surface part of both the rollers 51 * 51, ie, the dimension of "W1" shown in a figure also becomes large. As a result, it was trapped in the space indicated by “W1” and the transport state of the onion 6 was difficult to stabilize, and a root shorter than the depth indicated by “H1” could not be grasped.

  Therefore, as described above, in the present invention, the diameter of each roller 26, 26 is set to be as small as possible compared to the average diameter of the main body of the onion 6, so Distance, that is, the dimension of “H2” shown in the figure and the distance between the upper surfaces of both rollers 26 and 26, that is, the dimension of “W2” shown in the figure is as small as possible. It can be stabilized without getting stuck in the space, and it can be securely grasped even with a short root.

The front view which showed the whole structure of the bulb vegetable preparation machine which concerns on one Example of this invention. Similarly side view. The cross-sectional side view seen from the arrow A similarly shown in FIG. The cross-sectional top view seen from the arrow B similarly shown in FIG. The front view which showed the root extension part in this invention. FIG. The front view which showed the relationship between a roller and bulbous vegetables (onion). The front view which showed operation | movement of the roller.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Scale type vegetable preparation machine 2 Conveyance part 3 Cutting | disconnection part 4 Root stretch part 26R Roller 26L Roller 41a Sheet | seat part 41b Foamable member 41d Wing | blade 42 Support member

Claims (3)

  A bulb vegetable preparation machine comprising: a conveyance unit that conveys bulb vegetables, a cutting unit that cuts roots and leaves of the bulb vegetable, and a root extending unit that stretches across the root in front of the cutting unit The root stretcher includes a pair of rollers, and a plurality of blades are provided along the tangential direction on the surface of the outer peripheral portion of the rollers, and the blades are formed of an elastic member. And the length is set substantially the same as the outer periphery length of the said roller, or a long vegetable preparation machine characterized by the above-mentioned.   The bulb vegetable preparation machine according to claim 1, wherein the blades are provided in a strip shape along the axial direction of the roller.   The bulb vegetable preparation machine according to claim 1 or 2, wherein a diameter of the pair of rollers is made as small as possible as compared with an average diameter of the bulb vegetable.

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