JP4329086B2 - Slicer - Google Patents

Description

  The present invention relates to a slicer that varies the reciprocating speed of a storage box.

  The prior art will be described with reference to FIG. In a slicer that reciprocates the meat box 6 by the crank mechanism and varies the reciprocating speed of slicing the workpiece, the rotation speed of the motor for driving the meat box for rotating the crankshaft is low or high, The crankshaft was always rotated at the same speed during one rotation.

  Especially when the reciprocating speed is set to high speed (normal slicer is 65 times / minute), when the meat box 6 moves in the direction B from the opposite side of the round blade 2, that is, when slicing the meat chunk, Since the inertial force of the meat box 6 works in the B direction, a moment M1 acting as a swinging force acts on the foot C of the main body, and when the storage box 6 moves in the A direction, the inertial force of the meat box 6 becomes the A direction. Moment M2 acts on the foot D of the main body. When the dead center portion of the crank mechanism, that is, when the meat box 6 reaches the opposite end of the round blade 2 or when the meat box 6 reaches the end of the round blade 2, inertial force is applied to the movement direction side of the meat box 6. The applied moments M1 and M2 are maximized. In a normal slicer, there are a drive device for the round blade 2 and a drive device for the crank mechanism on the round blade 2 side. Therefore, since the center of gravity of the main body is shifted toward the foot D side on the processing blade 2 side, the swinging moment tends to have a relationship of M2> M1. Therefore, the shaking swing force when the meat box 6 moves to the round blade 2 side tends to become the largest. Further, as the reciprocating speed of the meat box 6 is increased, the inertial force at the end in the A direction and the end in the B direction of the movement direction of the meat box 6 is increased, and the moments M1 and M2 that are the shaking swing force of the main body are increased.

  Normally, a slicer that changes the reciprocating speed of this type of meat box 6 (a normal slicer is approximately 30 to 65 times / minute) is always shaken by the moments M1 and M2. Therefore, in order to prevent the shaking of the main body, the mass of the main body including the workpiece so that the moment M1 and the moment M2 are balanced when the reciprocating speed of the meat box 6 is maximum (reciprocating speed 65 times / min) The reciprocating speed of the meat box 6 to be balanced was determined from the forces F1 and F2 applied to the feet C and D and the distance L between the feet C and D.

  In order to increase the efficiency of the slicing work, if the maximum reciprocating speed of the meat box 6 balanced with the swinging moments M1 and M2 is set, the inertia force of the meat box 6 cannot be absorbed by the balance force of the machine body. The entire slicer was shaken like a seesaw, and the foot C and the foot D were alternately lifted, and eventually the main body moved. In order to prevent this, if the dead point part of the crank mechanism part is detected by the detecting means and the speed in the vicinity of each dead point is reduced, the inertial force of each dead point part is reduced and the moments M1 and M2 are reduced.

  This is an effective means for a slicer that does not vary the reciprocating speed of the meat box 6 in one reciprocation. However, in the slicing operation, there are a case where the sliced meat is operated while being manually arranged, and a case where only the slice is performed.

  When slicing the meat while aligning the sliced meat, it takes time to align the meat manually, so the time for one round-trip of the meat box 6 is delayed, that is, the slice interval is increased. In addition, when only slicing is performed, the slice interval is shortened as much as possible in order to improve the slicing efficiency, and the reciprocating speed is high. For this reason, there is a slicer in which the time for one round trip is variable so that one unit can perform both operations. In this type of slicer, when slicing while manually aligning, the reciprocating speed is the most efficient reciprocating speed that can be sliced while aligning (usually about 30 times / min), and the inertial force of each dead center There are few moments M1 and M2. In this state, if the speed in the vicinity of each dead center is reduced, the interval between one reciprocation becomes longer, resulting in a decrease in work efficiency.

  In addition, if the detecting means for detecting each dead point section fails during high-speed operation (speed exceeding 65 times / minute), the speed in the vicinity of each dead point is not decelerated and the slicing moment of the slicer increases. , It will be a situation that the body starts to move.

  In order to balance the swinging moments M1 and M2 with the reciprocating speed of the meat box 6 increased, the forces F1 and F2 applied to each part of the main body are increased, that is, the weight of the main body is increased, or between the feet C and D It is necessary to lengthen the distance L, which leads to an increase in the size and weight of the slicer body.

  In order to prevent shaking while increasing the reciprocating speed of the meat box 6 with a small space and light slicer, the main body feet C and D can be completely fixed to the floor with anchor bolts, etc. If fixed to the floor, the main body cannot be moved, and there is a problem that it is impossible to perform a cleaning operation to remove debris of a workpiece under the main body.

  In addition, when putting a workpiece such as a lump into the meat box 6, the meat box 6 is usually stopped at the opposite end of the round blade 2 (near the dead center of the crank) in order to prevent contact with the round blade 2. The workpiece is accommodated from the opposite side of the round blade 2. However, if only the slicing operation is performed and the meat box 6 is stopped at the position opposite to the round blade 2 with the reciprocating speed of the meat box 6 being increased to the maximum, the inertial force increases and stops. The amount of positional deviation increases. Therefore, since the meat box 6 does not stop at the position of the opposite end of the round blade 2, the meat box 6 is artificially moved to the opposite end of the round blade 2 and then the meat chunk is stored. For this reason, the work efficiency of storing the workpiece has been deteriorated. In order to prevent this, if the braking force for stopping the meat box 6 when the reciprocating speed of the meat box 6 is maximized is increased, the meat box 6 is suddenly stopped. Since the impact force and the impact sound are generated, the mechanical life of the crank mechanism is shortened, and there is also a problem of noise.

  Also, when slicing while slicing sliced meat etc., that is, when it is desired to work at a speed of 30 rounds per minute, the work efficiency of the slice Was mimicking the decline.

  The object of the present invention is to eliminate the drawbacks of the prior art described above, to increase the moving speed of the storage box while keeping the space and weight of the slicer body low, and to improve the work efficiency when slicing at low speed. There is to plan. As another purpose, when the storage box is moved at high speed, when the storage box is stopped, it is quietly and accurately stopped at the opposite end of the processing blade, and the means for detecting each dead point of the crank has failed. Sometimes it is to reduce the shaking of the slicer body.

In order to achieve the above object, the present invention has a storage box for storing a workpiece, and the storage box is moved between a first dead center and a second dead center by a storage box drive motor via a crank mechanism. A slicer for slicing the workpiece with a machining blade that is rotated by a machining blade driving motor during the reciprocating movement of the storage box, wherein the rotational speed of the storage box driving motor is Rotation speed changing means for changing the reciprocating speed of the storage box, rotation speed setting means capable of arbitrarily setting the rotation speed of the storage box drive motor in the rotation speed transmission means, and the rotation speed setting Control means for controlling the storage box drive motor in a different control mode according to the rotation speed set by the means is provided, the control means when the rotation speed set by the rotation speed setting means is less than a predetermined value The storage The storage box drive motor is driven by a first control mode for reciprocating at a speed corresponding to the motor speed set in the speed setting means, and the speed set in the speed setting means is predetermined. When the value is exceeded, the storage box drive motor is driven by the second control mode for reducing the speed of the storage box during the reciprocating operation of the storage box, and the second control mode is used. When the storage box drive motor is driven, the storage box is decelerated on the return path where the storage box returns from the round blade side, or the storage box is in the vicinity of the first and second dead centers. One of the features is that the speed of movement is reduced .

  According to the present invention, since the reciprocating speed of the meat box reciprocatingly moved by the crank mechanism is controlled according to the set number of rotations, the shaking moment of the main body can be reduced. This eliminates the need to increase the distance between the legs of the main body or increase the weight of the main body, provide a space-saving and lightweight slicer even if the reciprocating speed of the meat box is increased, and enables high-speed slicing operations. Therefore, the efficiency of slicing can be improved.

  Also, by reducing the return speed at which the meat box returns from the round blade side only when the speed of the meat box is increased, the meat box is stopped at the meat box position where the meat block is placed, that is, at the opposite end of the round blade side. In this case, the inertial force is reduced, so that the variation in the stop position is reduced.

  In addition, the mechanical impact force and impact sound at the time of stoppage are reduced, the mechanical life is extended and the noise is reduced, and the meat box has been moved artificially to the opposite end of the round blade side Since no work is required, the efficiency of slicing can be improved.

  Also, if the detection means breaks down during operation and the output is no longer output, the meat box will reciprocate at a speed at which the main body does not shake, so it is necessary to fix the main body to the floor etc. Therefore, since the main body can be easily moved, cleaning work around the main body is facilitated and workability is improved.

  As an embodiment of the present invention, a meat slicer that uses a meat chunk as a workpiece will be described with reference to FIGS. 1 is a front view of a meat slicer, FIG. 2 is a partially enlarged view of a crankshaft, FIGS. 3 and 5 are top views of FIG. 1, FIGS. 4 and 6 are partial right side views of FIG. 8 and 8 are right side views of FIG.

  In the figure, a round blade base 3 that supports a round blade 2 as a processing blade is provided upright on a machine base 1. The round blade 2 is rotationally driven by a round blade motor 5 serving as a machining blade motor via a belt 4. The meat box 6 serving as a storage box is provided so as to reciprocate toward the cutting edge of the round blade 2 using a rail 7 fixed to the upper part of the machine base 1 as a guide. The meat box 6 stores a meat chunk 13 as a workpiece, and the meat box 6 feeds the meat chunk 13 minutely toward the round blade 2 each time the meat box 6 reciprocates once in the meat box 6. 14 is provided. The meat box 6 is reciprocated by a meat box motor 11 serving as a storage box drive motor via a crank mechanism 8, a speed reducer 9 and a belt 10 provided in the machine base 1. The meat box motor 11 is connected to an inverter 12 serving as a speed change means, and the rotation of the meat box motor 11 is changed by changing the output frequency of the inverter 12. The inverter 12 is provided with a volume 21 serving as a rotation speed setting means that can set an arbitrary speed. Further, a comparison circuit 22 serving as a comparison means for outputting a signal when the rotation speed V1 set in advance in the inverter 12 and the speed V1 set by the signal of the volume 21 are exceeded and exceeds the rotation speed V2 set in advance. Is provided. As shown in FIG. 2, a rotary encoder that outputs a pulse signal proportional to the rotation of the crankshaft 15 serving as a detecting means for detecting a position near each dead point of the crankshaft 15 at the lower end of the crankshaft 15 of the crank mechanism 8. 16 is provided. By counting the pulse signals of the rotary encoder 16, the rotation angle of the crankshaft 15, that is, the positions near the dead points F and G of the crank mechanism 8 can be detected. Further, an operation switch 17 for outputting drive operation signals of the round blade motor 5 and the meat box motor 11 and a stop switch 19 for stopping the round blade motor 5 and the meat box motor 11 are provided on the front surface of the machine base 1.

  The signals of the operation switch 17 and the stop switch 19, the signal of the rotary encoder 16, and the signal output from the comparison circuit 22 in the inverter 12 are input to the sequencer 18 serving as control means. The sequencer 18 outputs to the inverter 12 a command signal of the speed V1 instructed by the drive and stop of the meat box motor 11 and the rotation speed setting means or a preset speed V2 to the inverter 12, and the round blade motor 5 It outputs excitation and demagnetization signals for the coil 20a of the electromagnetic switch 20 that drives and stops. Note that the speed V1 of the meat box motor 11 is set to an arbitrary speed by the volume 21, and the speed V2 is a limit speed at which the positional deviation is small when the meat box 6 stops and the slicer body does not start to shake. Set to V2. In the present embodiment, the speed V1 arbitrarily set by the rotation speed setting means is set to 30 to 80 times / minute in terms of the number of reciprocations of the meat box 6, and the preset speed V2 is set to 65 times / minute. In addition, the sequencer 18 preliminarily includes the number of pulses at the front position E of the dead point F on the round blade 2 side, which is the rotation angle of the crankshaft 15 in the vicinity of each dead point of the crank mechanism 8, and the dead side on the opposite side of the round blade 2. The number of pulses at the passing position H of the point G is input.

  In the above configuration, the operation of the slicer will be described. When the arbitrarily set speed V1 is 80 and the speed V1 is 80 times / minute in terms of the number of reciprocations of the meat box 6, the operation is as follows. When the meat block 13 is stored in the meat box 6 on the opposite side of the round blade 2 and the operation switch 17 is operated, the signal of the operation switch 17 is received by the sequencer 18, and the coil 20a of the electromagnetic switch 20 is excited. The round blade motor 5 is driven and a command signal and a drive signal at the speed V1 set by the volume 21 are output to the inverter 12, and the inverter 12 drives the meat box motor 11 at the rotation speed V1. At this time, since the speed V1 instructed by the volume 21 exceeds 65 times / minute of the preset rotation speed V2, a signal is output from the comparison circuit 21 in the inverter 12 to the sequencer 18. The meat box 6 moves forward through the belt 10, the speed reducer 9, and the crank mechanism 8 in the direction A of the round blade 2 side at a high speed with the rail 7 as a guide. At this time, the crankshaft 15 of the crank mechanism 8 also rotates synchronously, and the rotary encoder 16 outputs a pulse signal proportional to the rotation angle of the crankshaft 15. The sequencer 18 counts this pulse signal, counts the number of pulses until it reaches the position E before the dead center F of the crank mechanism 8 set in advance, and the signal is output from the comparison circuit 22. A command signal of speed V2 is output to the inverter 12.

  The inverter 12 decelerates the meat box motor 11 and drives it at a speed V2 (V1> V2). Therefore, the meat box 6 moves from the position E before the dead center F of the crank mechanism 8 at a speed V2 at which the main body does not start to shake. Thereby, the main body does not swing due to the inertial force of the meat box 6 near the dead center F on the round blade 2 side of the crank mechanism 8. The meat box 6 is moved in the backward direction in the arrow B direction opposite to the round blade 2 in the state of 65 times / minute.

  Next, when the sequencer 18 counts the number of pulses at the passing position H of the dead point G on the side opposite to the round blade 2, the sequencer 18 instructs the inverter 12 to rotate the rotation speed V1 indicated by the volume 21 at 80 times / minute. A signal is output and the meat box motor 11 is driven at a speed V1, that is, 80 times / minute. Therefore, after the meat box 6 passes through the dead center F on the opposite side to the round blade 2 at 60 times / minute, it moves forward at a speed V1, that is, 80 times / minute. As a result, the inertia force of the meat box 6 near the dead center G on the opposite side of the round blade 2 of the crank mechanism 8 is reduced, and the slicing operation is performed at a slicing speed exceeding 65 times / minute without shaking the main body.

  When the signal of the rotary encoder 16 is not output due to some failure during the repetition of this operation, the sequencer 18 has a small positional deviation when stopping at the speed V2 set in advance in the inverter 12, In addition, the slicer body is fixed to a limit speed at which the main body does not shake and the forward and backward speeds are set to V2. As a result, even if a signal from the rotary encoder 16 is not output, the speed V2 at which the main body starts to shake, that is, 65 times / minute is not exceeded.

  Next, when the speed V1 instructed by the volume 21 is 65 times / minute or less, for example, 30 times / minute, the rotation speed V2 set in advance is 65 times / minute or less, so the comparison circuit 21 No signal is output from.

  For this reason, even if the rotary encoder 16 reaches the position E before the dead center F of the crank mechanism 8 set in advance and counts the number of pulses, the sequencer 18 does not output the speed command signal of the speed V2 to the inverter 12. The meat box 6 reciprocates at a speed of 30 times / min.

  As a result, there is little variation in the stop position of the meat box, and the speed is less than the limit speed V2 at which the main body swings, so that the inertia force of the meat box 6 is small and the main body does not swing. Further, since the meat box 6 does not decelerate at each dead center, one round trip time (30 times / minute) suitable for work, that is, the slice interval does not become long.

  In the present embodiment, the sequencer 18 is used as the control means, but the same effect can be obtained even if the same control is performed in the control means such as a microcomputer circuit or a logic circuit. Further, although the rotary encoder 16 is provided on the crankshaft 15 as means for detecting the position near the dead center of the crank mechanism 8, it may be provided on the rotating shaft of the meat box motor 11, the rotating shaft of the speed reducer, or the like. Although the rotary encoder 16 that outputs a pulse signal is used for position detection, a plurality of limit switches or the like may be used because it is sufficient to detect the vicinity of each dead point. The positions near the dead centers of the crank mechanism 8 may be detected on the reciprocating path of the meat box 6.

  Further, the comparison circuit for comparing the preset speed and the speed set by the rotation speed setting means is provided in the inverter 12, but it may be provided in the control means. Similarly, the signal of the rotation speed setting means is input to the inverter 12, but it may be input to the control means.

FIG. 1 is a front view of the meat slicer. It is the elements on larger scale of a crankshaft. It is a schematic top view of FIG. It is a schematic partial right view of FIG. It is a schematic top view of FIG. It is a schematic partial right view of FIG. It is a block circuit diagram. FIG. 2 is a schematic right side view of FIG. 1.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 ... Round blade, 6 ... Meat box, 8 ... Crank mechanism, 5 ... Round blade drive motor, 11 ... Meat box motor, 16 ... Rotary encoder, 21 ... Volume, 22 ... Comparison circuit.

Claims (3)

A storage box for storing a workpiece; the storage box is reciprocated between a first dead center and a second dead center via a crank mechanism by a storage box drive motor; A slicer for slicing the workpiece with a machining blade rotated by a machining blade drive motor in the process of:
Rotational speed transmission means for changing the rotational speed of the storage box drive motor and changing the reciprocating speed of the storage box;
A rotational speed setting means capable of arbitrarily setting the rotational speed of the storage box drive motor in the rotational speed shifting means;
Provided is a control means for controlling the storage box drive motor in a different control mode according to the rotational speed set by the rotational speed setting means,
When the rotational speed set by the rotational speed setting means is less than a predetermined value, the control means reciprocates the storage box at a speed corresponding to the motor rotational speed set in the rotational speed setting means. The storage box drive motor is driven by the control form of
When the rotation speed set in the rotation speed setting means exceeds a predetermined value, the storage box drive motor is driven by a second control mode for reducing the speed of the storage box during the reciprocating operation of the storage box. To do ,
A slicer characterized in that when the storage box drive motor is driven by the second control mode, the speed of the storage box is reduced in a return path in which the storage box returns from the round blade side. A storage box for storing a workpiece; the storage box is reciprocated between a first dead center and a second dead center via a crank mechanism by a storage box drive motor; A slicer for slicing the workpiece with a machining blade rotated by a machining blade drive motor in the process of:
Rotational speed transmission means for changing the rotational speed of the storage box drive motor and changing the reciprocating speed of the storage box;
A rotational speed setting means capable of arbitrarily setting the rotational speed of the storage box drive motor in the rotational speed shifting means;
Provided is a control means for controlling the storage box drive motor in a different control mode according to the rotational speed set by the rotational speed setting means,
When the rotational speed set by the rotational speed setting means is less than a predetermined value, the control means reciprocates the storage box at a speed corresponding to the motor rotational speed set in the rotational speed setting means. The storage box drive motor is driven by the control form of
When the rotation speed set in the rotation speed setting means exceeds a predetermined value, the storage box drive motor is driven by a second control mode for reducing the speed of the storage box during the reciprocating operation of the storage box. To do,
A slicer characterized in that when the storage box drive motor is driven by the second control mode, the speed at which the storage box moves in the vicinity of the first and second dead centers is reduced. 3. When the storage box drive motor is driven by the second control mode according to claim 1 or 2 , the storage box is opposite to the round blade from the position (E) before the dead center on the round blade side. The slicer characterized by decelerating the speed which moves to the position (H) which passes the dead point of the side.

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