JPH09103989A - Cutter of single-direction stroke - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutter which allows a skilled cutting operation while always keeping the cut ends of material beautiful by operating the cutter in such a way that it always cuts material in a single-direction stroke whereby it crosses from above to below, and providing the cutter with a device which scrapes off chips clinging to the peripheral surface of a blade every time the cutting stroke of the cutter is made. SOLUTION: This cutter, which is provided with a ring 2 driven and rotated with its peripheral surface 4 held by a plurality of guide rollers 5, and in which a material B fed through the hollow part of the ring by a blade 3 extended across the hollow part is pushed and cut from above to below by the blade 3 that rotates along with the ring, has a moving element 12 which slides and drops along the blade 3 in order to clean chips on the peripheral surface of the blade 3 in a phase where cutting is not performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter of a type in which a blade is pressed against a relatively soft material to cut it.

[0002]

2. Description of the Related Art This type of cutter is generally widely used as a so-called push-cutting method in which a blade is pushed down from above to cut a material placed horizontally on a flat surface. The cutting tool that completes the cutting process needs a returning process to return to the initial position after each cutting, in which case the cutting tool returns to the original position through the material gap created by the cutting. Is normal. Therefore, in selecting the material of the blade, a material that can be made as thin as possible and has desired strength, such as a metal product or a hard resin product, is selected.

FIG. 6 and FIG. 7 show a procedure when a blade cuts a material by such a conventional push-cutting method. In the figure, A is a blade, B is a material to be cut,
C is an upstream conveyor constituting the conveyor line, D is a downstream conveyor, and E is a slit provided between the conveyors C and D as a passage for the blade A. FIG.
FIG. 6A shows a state immediately before the blade A is pushed down for cutting with respect to the stationary material B, and FIG. 6B shows the state where the blade A pushes down the material B to cut the material B. The state which passed through the slit E between C and D toward the downward direction is shown. In the figure, m is a chip of the material attached to the blade A when the blade A cuts the material B. The blade A in this state
By returning from the slit E to the original position by passing through the gap n created by cutting the material,
The cycle is completed.

In the case where the material to be cut is a material that easily adheres to the surface of the blade, such as a soft and sticky food, the operation method of the cutter is the reciprocating method as described above, that is, With the method of returning the blade to the old position after each cutting stroke, after the material was cut in the forward stroke, it occurred in the forward stroke when the cutter stuck the material chips to the surface during the return stroke. Since it will pass through the gap and return, and damage to the cut end of the material is unavoidable, in the case of such material, it is necessary to stop the reciprocating type as the operation method of the cutter and make it a unidirectional type. is there. As a preferred example of the unidirectional type, it has been conventionally practiced to use a thread-shaped wire as a blade of a cutter and minimize the surface area of the blade that comes into contact with the material during cutting. The structure of this cutter is to use a cylinder as a driving force source to move the cutter up and down, and to use it for both upward and downward movements for cutting. It is also called a double-acting reciprocating operation method. It should be. If this method is adopted, as the cutting mode, both the push-cut mode from above and the scooping mode from below are alternately performed, and although the operating directions at the time of cutting are different, the individual cutting methods are exactly In the case of a food product having a unidirectional structure and having adhesiveness, it can be said that the food product is improved in comparison with the conventional system in which the blade passes twice through the same cut surface.

[0005]

When the material is cut by using the above-mentioned conventional single-direction cutting method, that is, a method in which the cutting direction is alternately different each time, the following method is used. There is such a defect. 1) Among the mutually different cutting modes, in the case of pushing down from the upper side to the lower side, most of the bottom surface of the material except the slit portion is received from below by the conveyor, so even if it is sticky. Even in the case of a certain food, due to the structure in which the conveyor line is composed of two sets of conveyors and the blade goes down into the narrow slit provided between them, the material sticks to the blade and follows downward. Can be prevented. However, as the other cutting mode, the blade rises from below through the slit,
In the case of cutting the material from the bottom in the scooping direction, there is no way to prevent the material sticking to the knife and trying to follow it upwards, and the stuck material will pull the thread as the knife rises. As a result of being stretched upwards, the finish of the cut ends is poor, resulting in poorly-formed products occurring once every two times. The occurrence of this state tends to occur remarkably particularly on the sizing side because the weight of the material already cut on the sizing side is lighter than the weight on the uncut side. When such a poorly finished material is put into a baking kiln as the next step and baked, the protruding portion of the material is easily burnt, which may lower the product value. 2) A filament wire is used as the blade to minimize the surface area of the blade that comes into contact with the material during cutting.
If the target material is a particularly sticky food,
There is a concern that the state of the cut end of the material loses its neatness because the chips attached to the blade gradually accumulate and the surface of the blade loses smoothness. In that case, it is necessary to stop the operation of the cutting machine and clean the surface of the cutting tool, but during that time, it is unavoidable to stop the operation of the production line, which lowers the production efficiency.

The present invention has been made in view of the disadvantages of the above-mentioned conventional apparatus, and the operation mode of the cutter of the cutter for cutting the material is always performed by the unidirectional stroke traversing from the upper side to the lower side. By unifying,
It is an object of the present invention to provide a unidirectional stroke cutter capable of performing an efficient cutting work by keeping the cut state beautifully through uniform work.

Another object of the present invention is to perform a cleaning operation of a cutter blade by utilizing a return stroke after the cutter blade has performed a unidirectional stroke to cut the material. To provide a unidirectional stroke cutter that can constantly keep the blade clean within the time required for one cutting cycle and that can continuously perform cutting work without lowering production efficiency. is there.

[0008]

As a means for solving the above-mentioned problems, a unidirectional stroke cutter according to the present invention has a peripheral surface rotatably held by a plurality of guide rotating bodies, A ring body, which is driven to rotate in a single direction under the restriction of the guide rotating body, via an external driving means provided in the vicinity of the circumferential surface, and both ends of the ring body, passing over the rotation center point of the ring body. A cutter composed of a wire-shaped blade extending across the hollow portion of the ring body at a position of approximately the diameter of the ring body by being locked on opposite side surfaces, respectively. A conveyor line that conveys the material to be cut is disposed at a relative position where the conveyor line travels through the hollow portion of the ring body at a position where the central point of the hollow portion of the ring body of the cutter is removed.
The conveyor line has two sets of upstream and downstream conveyors that are respectively folded back and circulated at the penetration position, and the two sets of conveyors are separated by a slit serving as a transverse passage for a cutting process of a blade. Material on a conveyor line passing across the slits by a unidirectional stroke when the blades of a rotating cutter are positioned in opposing relation and traverse through the slits from top to bottom. It has a configuration to disconnect.

In order to cut the material on the conveyor line with the cutter constructed as described above, a ring body is provided near the peripheral surface, which constitutes a cutter with a blade extending across the hollow portion. It is intermittently rotated in one direction around the conveyor line while being held by the guide rotating body by the drive means from. The conveyor line on which the material is loaded travels at a predetermined speed, calculates the cycle for achieving the cutting length required for the material, and matches the intermittent rotation cycle of the cutter with this. Good. When the driving means of the cutter is activated in accordance with this cycle, the ring body rotates together with the blade, and the blade pushes the material on the conveyor line downward from above, and the blade itself is provided between the two sets of conveyors. Move down in the slit. Since the next cutting process is performed by the part of the blade on the opposite side with the center of rotation of the cutter as the boundary, 180
There is a phase difference of °, and the conveyor line continues to run during that time and move as much as the cut length of the material.

During the unidirectional rotation of the cutter,
For cleaning the surface of the blade after the blade of the cutter has traveled from the upper side to the lower side for cutting the material and in the middle of the stroke until the blade performs the next material cutting in accordance with the rotation of the cutter. Means can be provided.

Alternatively, the cleaning means is provided so as to slidably surround the peripheral surface of the cutting tool, and the length of the cutting tool is lengthened by the action of gravity generated by a change in the inclination angle of the cutting tool during the stroke of the cutting tool. It may be a moving body that slides down the peripheral surface of the blade along the direction.

In the case of this construction, for the moving body which surrounds the blade and slides down along the blade while sliding on its peripheral surface,
The direction of the blade when the force of gravity is most strongly exerted is the vertical direction, so the longitudinal direction of the blade coincides with the vertical direction as the stopping point of the cutter for surely sliding down the moving body. I have chosen the point to do. Also, while the moving body that has descended and was at the lowest position moves to the highest position by the rotation of the cutter by 180 °, the moving body stays at the current relative position on the ring body due to centrifugal force, and
At the same time as the rotation is stopped after the rotation of 80 °, the moving body that has lost the centrifugal force slides down along the blade while sliding on the peripheral surface of the blade. By this sliding down, the movable body scrapes off the chips adhering to the periphery of the blade and automatically cleans the periphery of the blade.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a unidirectional stroke cutter according to the present invention will be described with reference to the drawings. 1 to 5 are views showing one embodiment, the cutter 1 comprises a ring body 2 and a blade 3. Ring body 2
Is rotatably held by a guide roller 5 as four guide rotating bodies at a portion of the cylindrical peripheral surface 4,
The motor 7 is rotationally driven in a single direction under the restriction of the guide roller 5 via a gear 6 provided in a portion adjacent to the. In this embodiment, as the driving means from the outside provided in the vicinity of the peripheral surface of the ring body 2, an example using a motor and a gear mechanism has been shown, but the invention is not limited to this. For example, a synchro belt or another belt may be used. Further, although the guide roller 5 has been described as an example of the guide rotating body, a pinion is used as another example of the guide rotating body.
By providing the gear 6 over the entire peripheral surface 4 of the ring body 2 and engaging the pinion with this gear, it is possible to achieve the same effect as that of the guide roller 5.

The blade 3 is made of, for example, a stainless steel wire, and its both ends are locked by the locking bodies 8 and 8 on both side surfaces facing each other beyond the center point P of rotation of the ring body 2, respectively. The ring body 2 is stretched across the hollow portion of the ring body 2 at a position of almost the same diameter.

The material B to be cut rides on the conveyor line constituted by the upstream side conveyor 9 and the downstream side conveyor 10 and is fed from the upstream side in the direction passing through the hollow portion of the ring body 2. The position of the penetration point on the ring body 2 through which the conveyor line penetrates is determined by the rotating blade 3 of the material B.
Since it is necessary in the arrangement for cutting, the center point of the hollow portion of the ring body is removed. In addition, the blade 3 is located at the center point P as a boundary from the top of the area section related to cutting,
Since it is considered that each of the parts 3a and 3b alternately participates in the cutting of the material B in accordance with the rotation of the cutter, it is considered that the cutting process is performed twice by one rotation of the cutter 1. Will be done. As shown in FIG. 2, the upstream side conveyor 9 and the downstream side conveyor 10 are disposed at a relative position where they are in contact with each other with a slit 11 serving as a transverse passage for the cutting process of the blade 3 being in contact with each other.

Reference numeral 12 denotes a moving body as means for cleaning the chips m adhering to the surface of the blade 3, which is provided in a state of slidably surrounding the peripheral surface of the blade 3. The moving body 12 has edges 13 at both ends, so that when the moving body 12 moves on the blade 3, the chips m attached to the periphery of the blade 3 are scraped off and the chips attached to the periphery of the edge 13 without dropping. Carry m to the location of the blade locking body 8. 14
Is an air nozzle (also referred to as an air nozzle), which is provided near the position of the edge 13 when the blade 3 is aligned with the vertical line,
This is for blowing off the chips m attached around the edge 13. The proximity switch 15 is for regulating the position when the cutter 1 rotates and the blade 3 coincides with the vertical line, and cooperates with the proximity body 16 provided on the side surface of the ring body 2 to cut the cutter 1. This is for stopping the cutter 1 at a position corresponding to the vertical line. 17 is a frame,
This is for rotatably holding four sets of guide rollers 5 for rotatably supporting the cutter 1.

Next, the mode of operation of the unidirectional stroke cutter according to the present invention will be described.

When the composition of the working time of the cutter is shown as a formula, it is displayed as follows.

T = t ₁ + t ₂ [1] However, T ... moving time for one pitch of material on the conveyor line t ₁ ... time required for the cutter to make one rotation t ₂ ... Here, t ₁ includes the time for cutting the material, and 0.3 seconds is obtained as an example of a practical numerical value regarding t ₁ .

Further, t ₂ includes the cleaning time for the chips on the surface of the blade, and 1.5 seconds is obtained as an example of a practical numerical value regarding t ₂ .

Therefore, if these values are adopted as they are, T = (0.3 + 1.5) seconds = 1.8 seconds [2], and one material is cut in 1.8 seconds. Become.

If the length L of one cut material is determined, the traveling speed v required for the conveyor line is v = L ÷ 1.8 m / s [3] Can be set.

The mode of operation of the single-direction stroke cutter of the above embodiment will be described below. The cutter 1 rotates and the blade 3
Reaches a position that coincides with the vertical direction, the proximity switch 15 senses the proximity body 16 and stops the rotation of the cutter 1 at that position, and the moving body 12 located at the upper end of the blade 3 loses centrifugal force. It descends while sliding along the blade 3. At this time, the edges 13 of the moving body 12 scrape off the chips around the cutting tool, and the chips that do not spill are attached to the cutting tool 3 in the same shape.
The moving body 12 falls to the end portion on the other side of. The air nozzle 14 is provided at this position, and by blowing away the chips m with the edges 13 by this air, it is possible to automatically remove and clean the chips m adhering to the peripheral surface of the blade 3. Next, after a lapse of time t ₂ during which the cutter 1 is stationary in the vertical position, the cutter 1 starts rotation by a timer function for releasing the stop of the proximity switch 15, and at a point of a rotation angle of 80 ° to 90 °. The cutting for the material B is performed. This cutting is performed as a unidirectional stroke cutting operation at the portion 3a of the blade 3. After cutting, the blade 3 continues to rotate, and the portion 3a passes downward through the slit 11 provided in the conveyor line, and the rotation angle is 180.
At the point where the angle reaches 0 °, the proximity body 16 and another proximity body 16 provided at a position in polar symmetry respond to the proximity switch 15 to stop the rotation of the cutter 1, and up to this point the centrifugal force acts on the blade 3 part. The moving body 12, which is stationary at the end on the 3b side, loses centrifugal force and slides down along the blade 3. The subsequent operation is similar to that in the phase before the rotation angle of 180 °, and the above operation is repeated every 180 ° rotation.

If the cutter 1 stops rotating for some reason, or if the rotating speed of the cutter 1 is too slow to generate a centrifugal force enough to make the moving body 12 stand still on one end of the blade 3, As shown in FIG. 3, before the angle θ between the blade 3 and the vertical direction becomes zero,
There is a case where the moving body 12 starts to slide down in the direction of gravity action. In such a case, the phase of the angle θ at which the sliding body starts to slide down takes into consideration the existence of a frictional force generated between the two when sliding down,
It can also be clearly seen from the figure that it will occur in the range of phases in which the blade 3 has already passed the slit 11 of the conveyor line. If there is a risk of downhill in front of this, install the conveyor line at a slightly higher height.

Regarding the mode of action for cleaning the blade for cutting the material, the automatic cleaning means utilizing the free fall stroke of the moving body has been described as an example. As the cleaning means, various methods other than the above can be applied. For example, a method in which the cutter 1 is stopped at a specific position and a rotating brush or the like is pressed against the surface of the blade to remove chips attached to the blade is also applicable, and the point is that one cycle of material cutting by the cutter is required. Any work that can keep the blade clean within the time limit is acceptable.

[0026]

As is apparent from the above description,
According to the unidirectional-stroke cutter according to the present invention, 1) the push-cut method is applied in which the blade is always pushed downward from above to cut the material continuously fed on the conveyor line. As a result, you can achieve an efficient cutting work by keeping the cut state beautifully through uniform work. A single direction from top to bottom, especially for food materials that are relatively soft and sticky, and for which it is difficult to obtain a neat finish result due to the material sticking to the blade during cutting. By cutting, it is possible to realize highly efficient work.

2) One cycle of cutting the material of the cutter is carried out by automatically performing the cleaning operation of the blade of the cutter each time by utilizing the returning stroke after the cutting stroke of the cutter in one direction. The blade can always be kept clean within the required time, and cutting work can be realized continuously without lowering production efficiency.

Especially when the material is a sticky food,
In the conventional device, chips attached to the blade are gradually accumulated and the surface of the blade loses smoothness, and as a result, the cut state of the material tends to be unclean. In that case, it was necessary to stop the operation of the cutting machine and clean the surface of the blade, but during that time, the production line was inevitably stopped, and the production efficiency was inevitably reduced. According to the cutter of the present invention, these problems of the conventional device can be solved, continuous cutting work can be performed, and work efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of a unidirectional stroke cutter according to the present invention.

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

FIG. 3 is an explanatory view showing an operation mode of the cutter of FIG. 1.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is an enlarged sectional view of a main part of FIG.

FIG. 6 (a) and FIG. 6 (b) are explanatory views of a material cutting procedure in a descending direction by a conventional cutter.

FIG. 7 is an explanatory diagram of a material cutting procedure in a rising direction by a conventional cutter.

[Explanation of symbols]

 1 Cutter 2 Ring Body 3 Blade 4 Circular Surface 5 Guide Roller 6 Gear 7 Motor 8 Locking Body 9 Upstream Conveyor 10 Downstream Conveyor 11 Slit 12 Moving Body 13 Edge 14 Air Nozzle 15 Proximity Switch 16 Proximity Body B Material P Center Point

Claims (3)

[Claims] 1. A circumferential direction is rotatably held by a plurality of guide rotating bodies, and is unidirectionally regulated by the guide rotating bodies via an external driving means provided near the circumferential surface. The ring body to be driven to rotate is traversed through the hollow portion of the ring body at a position of approximately the diameter of the ring body by locking both ends on both side surfaces facing each other beyond the center of rotation of the ring body. A cutter composed of a wire-shaped blade stretched over the cutter, the cutter being configured such that the conveyor line for conveying the material to be cut is located at a position where the center point of the hollow portion of the ring body of the cutter is removed. The conveyor line is disposed at a relative position where it travels through the hollow portion, and the conveyor line is provided with two sets of conveyors of an upstream side and a downstream side that are respectively folded and circulated at the penetration position. A single direction when a cutter blade of a rotating cutter is placed in a relative position facing each other across a slit, which is a transverse passage for the cutting stroke of the object, and traverses downward from above through the slit. A unidirectional stroke cutter that cuts material on a conveyor line that passes over the slits by a stroke. 2. The cutter performs the next material cutting according to the rotation of the cutter after the cutter's blade travels from the upper side to the lower side for cutting the material in the middle of the unidirectional rotation of the cutter. The unidirectional stroke cutter according to claim 1, further comprising means for cleaning the surface of the cutting tool during the stroke up to. 3. The cleaning means is provided so as to slidably surround the peripheral surface of the cutting tool, and the cutting tool is acted upon by the action of gravity caused by a change in the inclination angle of the cutting tool during the course of the cutting tool. The cutter with a single direction stroke according to claim 2, wherein the cutter is a moving body that slides down along the longitudinal direction while sliding on the peripheral surface of the blade.