JP4187063B2 - Can sealer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a can sealer, and in particular, to a technique for fitting a can body and a lid material and efficiently sticking an adhesive tape across a fitting portion of both members.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a can sealer is known in which a lid member is fitted to a can body, and an adhesive tape is applied and sealed across a fitting portion of both members. Specifically, a can integrated with a can body fitted to a can body is placed on a turntable, and the lid portion is rotatably held by a chuck. While rotating the turntable in this state, the adhesive tape is pasted across the fitting portion between the can body and the lid member via the pasting roll.
[0003]
As shown in FIG. 13, the drive system for rotating the turntable performs on / off switching of the motor M that is the drive means, the inverter 70 that adjusts the rotation speed of the motor M, and the driving force transmission of the motor M. The clutch 71, a speed reducer 72 that reduces the rotational drive of the motor M, and a brake 74 that stops the rotation of the turntable 73 are configured. The rotation axis of the turntable 73 is interlocked with a cam mechanism equipped with a limit switch so as to sequentially apply and cut the adhesive tape of the tape application portion and stop the turntable 73 according to the rotation. Yes.
[0004]
In other words, as shown in FIG. 14, the drive system operates by rotating the motor at a rotation speed set in advance according to the type of can (for example, the size of the can) so that the feeding speed of the adhesive tape is constant. Then, after setting the can to be sealed on the turntable, the clutch is turned on and the turntable is rotated. At the same time as the clutch is turned on, the adhesive tape is applied in conjunction with the cam mechanism.
[0005]
In addition, since the braking distance until applying the brake and stopping the turntable is different between the high speed and the low speed of the motor, the inverter is controlled so as to decelerate gradually according to the rotational speed of the motor. . In other words, the turntable is stopped at a predetermined position by decelerating the clutch to a predetermined speed and releasing the clutch from a state where the rotation is stable.
[0006]
[Problems to be solved by the invention]
However, the conventional can sealer has the following problems.
That is, the turntable does not stop at a predetermined position and overruns due to deterioration of the cam mechanism and brake consumption. When the turntable overruns, the cam mechanism linked to the turntable's rotating shaft turns on the next limit switch.
[0007]
That is, the sticking roll enters the operation of sticking the adhesive tape to the next can and approaches the can where the adhesive tape has been attached. Accordingly, there are inconveniences that it becomes difficult to take out the can and that it becomes difficult to set the next can.
[0008]
Furthermore, there is a problem that it is necessary to reset the sticking roll so as to return to the standby position.
[0009]
Further, when the motor rotates at a high speed as in the type of can, for example, the small-diameter can shown in FIG. 14, the rotational speed of the motor must be gradually reduced in order to stop the turntable at a predetermined position. It is not possible to enter the operation of stopping the turntable directly from the rotation. In other words, in order to apply the brake, as shown in part H of FIG. 14, there is a part where the motor is rotated in a stable state by decelerating to a predetermined number of revolutions, and it takes more time than necessary to apply the adhesive tape. Therefore, inconveniences such as poor work efficiency occur.
[0010]
The present invention has been made in view of such circumstances, and has as its main object to provide a can sealer that fits a lid to a can body and efficiently affixes an adhesive tape to the fitting portion. To do.
[0011]
[Means for Solving the Problems]
In order to achieve such an object, the present invention has the following configuration.
That is, the invention according to claim 1 is a turntable on which a can in which a can body and a lid member are fitted, a driving means for generating a driving force for rotating the turntable, and the driving means. A driving unit for transmitting the driving force from the tape to the turntable, a tape applying means for applying an adhesive tape across the fitting portion of the can body and the lid, and a cutting means for cutting the attached adhesive tape; A can sealer with
The drive unit includes a main driving gear and a driven gear for passively transmitting a driving force from a driving means to the turntable,
The main driving gear has a missing tooth portion for interrupting transmission of rotational driving to the driven gear, and a pair of drive transmissions for transmitting rotational driving to the driven gear side instead of the main driving gear in the missing tooth portion. A member is provided, and a restricting member for restricting the rotational drive of the driven gear is provided between the pair of drive transmission members on the rotation shaft of the main gear,
The driven gear is provided with a regulated member on its rotating shaft,
The regulated member has an engaging portion with which the drive transmission member is engaged,
And when transmission of the driving force from the driving means is stopped, the regulating member on the main gear side and the regulated member on the driven gear side are engaged to stop driving of the driving unit. is there.
[0012]
(Operation / Effect) According to the first aspect of the present invention, when the driven gear comes to the tooth-missing portion of the main driving gear during driving of the driving unit, transmission of the rotational drive from the main driving gear to the driven gear is interrupted. At this time, instead of the two gears, the rotational drive from the drive transmission member is transmitted to the driven gear side via the engaging portion provided on the regulated member. Next, the regulating member at the missing tooth portion of the main driving gear is engaged with the regulated member on the driven gear side. Therefore, the rotation operation of the regulated member is regulated by the regulating member, and the drive of the drive unit can be stopped. Further, since the drive unit stops at a predetermined position, the turntable interlocked with the drive unit also stops at a predetermined position.
[0013]
According to a second aspect of the present invention, in the can sealer according to the first aspect, the drive means stops the rotational drive of the drive unit at a position where the restricting member and the restricted member are engaged. It is characterized by comprising control means for controlling the stop timing.
[0014]
(Operation / Effect) According to the invention described in claim 2, since the drive of the drive means is stopped so that the drive unit stops in a state where the restricting member and the restricted member are engaged, the drive unit is driven. The turntable to which force is transmitted can always be stopped at a predetermined position.
[0015]
Further, the invention according to claim 3 is the can sealer according to claim 1 or 2,
Counting means for counting the rotation as an equally divided pulse signal in the course of one rotation of the main gear,
A memory that stores in advance the number of timing pulses that serve as a reference for the drive unit to stop when the regulating member and the regulated member are engaged when the adhesive tape is applied at a rotational speed corresponding to the type of can; With
The control means compares the number of pulse signals counted by the counting means with the number of predetermined timing pulses stored in the memory, and the number of pulse signals counted by the counting means and the number of predetermined timing pulses. The drive means is stopped when and coincide with each other.
[0016]
(Operation / Effect) According to the invention described in claim 3, the pressure-sensitive adhesive tape has a number of rotations corresponding to the number of pulse signals counted by the counting means and the type (for example, size) of the can previously stored in the memory. When the control member is attached, the control unit compares the number of timing pulses serving as a reference for stopping the drive unit by engaging the regulating member and the regulated member.
[0017]
That is, when the number of pulse signals equal to the number of predetermined timing pulses stored in the memory in the process of comparison is counted from the counting means, the control means stops the driving means. The drive unit is stopped in a state where the member is engaged, and the turntable to which the driving force is transmitted from the drive unit can always be stopped at a predetermined position.
[0018]
According to a fourth aspect of the present invention, in the can sealer according to any one of the first to third aspects, the restricting member has a projecting portion with an arc-shaped tip, and the restricted member is The tip has an arc-shaped recess.
[0019]
(Operation / Effect) According to the invention described in claim 4, the regulating member is formed such that the tip has an arc-shaped convex portion, and the regulated member has the tip having an arc-shaped concave portion. As a result, the edge portion of the regulated member is caught by the edge portion of the regulating member whose rotation has stopped, and the rotational drive due to the inertia of the driven gear is regulated. Therefore, the can sealer according to any one of claims 1 to 3 can be suitably realized.
[0020]
The invention as set forth in claim 5 is the can sealer according to claim 4,
The regulating member has one convex portion, the regulated member has two concave portions at both ends in the diameter axis direction of the rotating shaft, and the rotation ratio between the main driving gear and the driven gear is the main driving The driven gear is 1.5 rotations per one rotation of the gears.
[0021]
(Operation and Effect) According to the invention described in claim 5, when the main driving gear is rotated once, the driven gear is stopped at a position where the driven gear is rotated 1.5 times. Therefore, since the turntable linked to the drive unit also rotates 1.5 times, the adhesive tape can be applied to the can within a range of less than 1.5 rotations by adjusting the timing of applying the adhesive tape of the tape applying means. Can do.
[0022]
The present invention also discloses the following solution.
[0023]
(1) A can sealer for adhering an adhesive tape across a fitting portion of a can body and a lid while rotating a can fitted with the can body and a lid on a turntable,
The turntable includes one or more sets of regulating members that are arranged to face each other at regular intervals in the radial direction from the rotating shaft so as to regulate the position of the can.
In addition, when the one restricting member is moved in the rotation axis direction, the other restricting member is also driven by the same distance in the rotation axis direction, and the one restricting member is moved in the radial direction from the rotation axis direction. A can sealer characterized in that the other regulating member also follows the radial direction by the same distance.
[0024]
(2) In the can sealer according to (1),
The set of first regulating members;
A second regulating member that moves to the left and right in the radial direction on an axis orthogonal to the virtual axis on which the first regulating member moves;
And the said 2nd control member was comprised so that it might stop at the position of the equilateral distance of a radial direction, The can sealer characterized by the above-mentioned.
[0025]
In the case of a conventional can sealer, depending on the type of can, a turntable in which the center of the rotation axis of the turntable and the center of the can coincide with each other is prepared and used separately.
[0026]
That is, every time the type of can on which the adhesive tape is applied is changed, the turntable must be removed and replaced, resulting in inconvenience that work efficiency is poor. In addition, there is a disadvantage that a replacement jig is required for each turntable.
[0027]
According to the can sealer described in (1), when one of the sets of regulating members arranged opposite to each other at equal intervals from the rotating shaft of the turntable is moved in the radial direction or the rotating shaft direction, the other is also moved in the radial direction or by the same distance. Follows the rotation axis direction. Therefore, if the can is placed on the turntable and sandwiched between the regulating members, the can can be centered on the turntable.
[0028]
Further, according to the can sealer described in (2), the can is centered from one direction by sandwiching the can with the first regulating member, and the centering position of the can from the other direction is determined by the second regulating member. By placing, the centering can be performed under the same conditions as the state where the can is sandwiched from four directions.
[0029]
In addition, since there is one second restricting member, the can can be slid into the turntable from the other direction where the restricting member is not located, and the can can be slid while being pushed against the second restricting member. .
[0030]
(3) A can in which an adhesive tape is pasted over a fitting portion between the can body and the lid material via a tape affixing means while the can fitted with the can body and the lid material is placed on a turntable and rotated. Sheila,
The tape affixing means is a roll that abuts the can and affixes the adhesive tape;
A flat guide that feeds the adhesive tape while pinching with the roll;
A can sealer characterized by comprising
[0031]
(4) In the can sealer according to (3),
A can sealer in which the guide is processed with a fluororesin.
[0032]
In the case of the conventional apparatus, as shown in FIG. 15, when the adhesive tape is fed out, a pin 80 formed in a “U” shape is inserted into the support shaft 83 at the tip of the arm 82 arranged at a position facing the roll 81. Then, the arm 82 is spring-biased toward the roll 81, and is fed out while pressing the adhesive tape T between the tips of the two pins 80 and the roll 81.
[0033]
However, since the interval between the two pins is fixed, the adhesive tape cannot be fed out in a stable state when the width or position of the adhesive tape is changed. That is, when the width of the adhesive tape is narrower than the pin interval or wider than the pin width, there is a problem that both ends in the width direction of the adhesive tape are fluttered.
[0034]
Moreover, since it is pin shape, there also exists a problem that it is easy to be broken by the pressing force which acts at the time of paying out an adhesive tape.
[0035]
According to the invention described in (3), since the guide shape is a flat plate shape, the tip can be held in a state of being in contact with substantially the entire length in the width direction of the adhesive tape, and the adhesive tape can be fluttered. The adhesive tape can be fed out in a stable state.
[0036]
Moreover, according to invention of (4), an adhesive tape can pass smoothly between a roll and a guide by using the guide which carried out fluorine resin processing.
[0037]
(5) A turntable on which a can fitted with a can body and a lid member is placed, a driving means for generating a driving force for rotating the turntable, and a driving force from the driving means is applied to the turntable. A drive unit for transmitting to the tape, a tape applying means for attaching an adhesive tape along the periphery of the fitting portion of the can body and the lid member, and a cutting means for cutting the attached tape to a predetermined length. A can sealer,
Memory that pre-stores information for determining the timing of a series of physical operations from the sticking of the adhesive tape to the can to the end for each type of can,
Control means for controlling a series of physical operations in accordance with the timing stored in the memory;
A can sealer characterized by comprising
[0038]
(6) In the can sealer according to (5),
The can sealer according to claim 1, wherein the timing of the physical operation is a timing of applying, cutting and stopping the driving means of the adhesive tape.
[0039]
The conventional can sealer is a combination of a cam mechanism that drives in conjunction with the rotation of the rotary shaft of the turntable and a limit switch, and the timing of a series of operations for attaching the adhesive tape to the can, such as attaching and cutting the adhesive tape. Had decided.
[0040]
Therefore, since the configuration of the cam mechanism is complicated, the timing of attaching the adhesive tape cannot be easily changed when the type of the can is changed.
[0041]
According to the invention described in (5) above, the timing of a series of physical operations from the sticking of the adhesive tape to the can to the end, for example, sticking of the adhesive tape, cutting, and stopping of the driving means is determined. The information to be stored is stored in advance in the memory according to the type of can. Therefore, by controlling the timing of a series of physical operations while referring to the information stored in the memory, the adhesive tape can be easily attached to the can even if the type of the can is changed.
[0042]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a side view showing a schematic configuration of a can sealer according to the present embodiment, and FIG. 2 is a plan view showing a schematic configuration of the can sealer.
[0043]
As shown in FIG. 1, the can sealer 1 according to the present embodiment is an operation plate that adjusts the height by moving up and down an operation plate 3 provided with a sticking portion 2 provided with a tape reel or the like around which an adhesive tape is wound. The height adjusting unit 4, the mounting unit 6 for mounting the turntable 5 on which the can K is placed, the presser unit 7 for pressing and holding the can K placed on the turntable 5 from above, and input of various operation settings In addition, an operation unit 8 provided with a start button for starting the application of the adhesive tape and a work table 9 are provided on the base 10. Hereinafter, the structure of each part is demonstrated concretely.
[0044]
As shown in FIG. 3, the affixing unit 2 affixes the adhesive tape T fed from the tape reel 11 and sent from the guide roll R group across the portion where the can body and the lid material are fitted. It comprises a first sticking mechanism 12, a cutting mechanism 13 for cutting the adhesive tape T, and a second sticking mechanism 14 for sticking the terminal portion of the cut adhesive tape T to the can.
[0045]
The first sticking mechanism 12 includes an arm 15 that is pivotally supported by the operation plate 3 so as to be swingable. A guide roll R that is rotatably supported is provided in front of the rear portion, the shaft portion, and the front end portion of the arm 15, and the first sticking roll that is rotatably supported at the tip end of the arm 15 is provided. The adhesive tape T is fed out toward 16.
[0046]
Further, the guide roll R on the distal end side of the arm 15 is fed out while sandwiching the adhesive tape T with the first sticking roll 16 to prevent the adhesive tape T from being reversed. Further, a tape guide 17 is provided in the vicinity of the first sticking roll 16 so that the adhesive tape T is fed out in a stable state without fluttering.
[0047]
The tape guide 17 has a flat plate shape processed with a fluorine-based resin, and as shown in FIGS. 4 and 5, is attached to a rotating shaft 18 on which a guide roll R on the front end side is pivotally supported. It is provided at the tip of the arm 19. The arm 19 is spring-biased so that the tip of the tape guide 17 contacts the adhesive tape T. The tape guide 17 is detachable.
[0048]
Further, as shown in FIG. 3, the arm 15 has a cylinder S coupled to a protruding portion 20 protruding from the shaft portion. That is, the arm 15 is swung so that the first sticking roll 16 at the tip moves between the standby position and the action position for sticking the adhesive tape T to the can by the expansion and contraction operation of the cylinder S.
[0049]
The cutting mechanism 13 includes an arm 21 that is pivotally supported by the operating plate 3, and a cutter blade 22 is attached to the tip of the arm 21. A cylinder S is connected to the rear part of the arm 21, and the cutter blade 22 at the tip of the arm 21 is moved between the standby position and the action position for cutting the adhesive tape T by the expansion and contraction operation of the cylinder S. 21 is swung.
[0050]
The second sticking mechanism 14 includes an arm 23 that is pivotally supported by the operating plate 3, and is a second pivotally supported so as to press and stick the adhesive tape T to the tip thereof. A sticking roll 24 is provided. Further, the arm 23 is also connected to the cylinder S on the rear side thereof, and the second sticking roll 24 at the tip of the arm 23 by the expansion and contraction operation of the cylinder S has a standby position and an action position for sticking the adhesive tape T to the can. The arm 23 is swung so as to move over the distance.
[0051]
The above-described arms 15, 21, 23 are arranged so as not to interfere with each other's operation. The operation of the cylinder S that swings each arm is controlled by a control unit 25 described later.
[0052]
Returning to FIG. 1, the working plate height adjustment unit 4 is for changing the position (height) at which the adhesive tape T is stuck to the can K. That is, the operating plate 3 is moved up and down along the guide rail by a drive mechanism (not shown) by rotating the handle 26 provided on the upper portion of the operating plate height adjusting unit 4 forward and backward. By moving the working plate 3 up and down, the height of the sticking roll of the sticking unit 2 provided on the working plate is changed.
[0053]
As shown in FIG. 6, the attachment unit 6 is connected to a drive unit 27. As shown in FIG. 6, the drive unit 27 includes a main drive unit 29 that transmits rotational drive from a motor M that is rotated by an inverter 28, and a driven unit 30 that transmits power from the main drive unit 29. ing.
[0054]
The main drive unit 29 includes a gear 31 that passively drives the rotation from the motor M through the chain C, and a regulating member 33 that is integrally formed with the main drive gear 32 provided on the rotation shaft to which the gear 31 is attached. It is configured. The main driving gear 32 and the regulating member 33 are arranged on the guide plate 34. Further, a pair of drive transmission members 34 a are provided on the guide plate 34.
[0055]
The main driving gear 32 meshes with the driven gear on the driven unit side and transmits rotational driving, but a part of the main driving gear 32 is missing. That is, the part which interrupts transmission of the rotational drive from the main drive gear 32 to a driven gear is ensured.
[0056]
As shown in FIG. 7, the restricting member 33 has a protruding portion 35 with an arc-shaped protruding tip, and this protruding portion 35 engages with an arc-shaped recessed portion 37 of a driven member-side restricted member 36 described later. It is like that. The convex portion 35 has a smaller diameter than the radius of the main driving gear 32, and is positioned so as to overlap the missing tooth portion of the main driving gear 32.
[0057]
As shown in FIG. 7, one drive transmission member 34 a is provided at each of the missing teeth of the main driving gear 32 with the regulating member 33 interposed therebetween. That is, the drive transmission member 34a engages with an engagement portion 36a provided on the regulated member 36, which will be described later, along with its rotation, and transmits rotational drive to the driven portion 30 side instead of the main drive gear 32.
[0058]
Further, when the transmission of the rotational drive to the driven portion 30 side is finished and the drive transmission member 34a is switched to the transmission of the rotational drive from the main driving gear 32 to the driven gear, the position of the drive transmission member 34a is set so that the two gears can be engaged with each other accurately. It is also used for matching.
[0059]
In addition, a rotary encoder 39 is provided on the rotary shaft 38 of the main drive unit 29, and pulse signals obtained by equally dividing one rotation of the rotary shaft 38 are sequentially counted. In the case of the present embodiment, a pulse signal obtained by dividing one rotation of the rotation shaft 38 or 1.5 rotation of the rotation shaft on the driven unit side by 1000 is sequentially counted and sent to the control unit 25. The rotary encoder 39 corresponds to the counting means of the present invention.
[0060]
Further, although not shown in the figure, the main moving portion 29 includes a sensor that detects an initial state (position) in which the regulating member 33 and the regulated member 36 are engaged. The sensor is not particularly limited as long as it can detect the initial position. For example, a non-contact optical sensor is used.
[0061]
The driven unit 30 includes a driven gear 40 that is driven by the rotational drive of the main drive gear 32, and a regulated member 36 that is connected to a rotation shaft 41 of the driven gear 40.
[0062]
The gear ratio of the driven gear 40 is set so as to rotate 1.5 times while the main driving gear 32 rotates once.
[0063]
As shown in FIG. 7, the regulated member 36 is formed by a projecting portion 44 having a concave portion 37 having an arcuate tip on the left and right in the radial direction, and the regulating member 33 is engaged with the concave portion 37 of the projecting portion 44. It is supposed to be.
[0064]
Further, the base end side of the protruding portion 44 is constricted, and an engaging portion 36a with which the drive transmission member 34a is engaged is formed in this portion.
[0065]
In addition, when the convex part 35 of the regulating member 33 and the concave part 37 of the regulated member 36 are engaged, a gap is provided so that the opposing surfaces of both parts do not come into contact with each other. In this embodiment, for example, it is set to about 10 μm.
[0066]
Further, the regulated member 36 also rotates 1.5 times while the main driving gear 32 makes one rotation like the driven gear 40.
[0067]
That is, when the drive unit 27 rotates the main drive gear 32 once from the initial state (position) shown in FIG. 7, the engagement of the restriction member 33 is first disengaged from the restricted member 36 and the drive transmission member 34 a is engaged. The driven gear 40 starts to rotate by engaging with 36a.
[0068]
Immediately before the transmission of the rotational drive from the drive transmission member 34a to the driven gear 40 side is completed, the main drive gear 32 meshes with the driven gear 40, and the rotational drive is transmitted to the driven unit side.
[0069]
Next, when the driven gear 40 approaches the missing tooth portion of the main driving gear 32, transmission of direct rotational drive from the main driving gear 32 to the driven gear 40 is interrupted. Instead of the rotational drive by this gear, the drive transmission member 34a engages with the engaging portion 36a of the regulated member 36 that has rotated once, and the rotational drive is continued and transmitted to the driven portion side.
[0070]
When the engagement of the drive transmission member 34a is disengaged from the engaging portion, the regulating member 33 is engaged with the regulated member 36 on the side opposite to the initial position where 1.5 rotation has occurred, and at that time, one rotation of the main gear 32 is performed. And the rotational drive of the motor M is also stopped. At this time, the edge portion of the concave portion 37 of the regulated member 36 is caught by the edge portion of the convex portion 35 of the regulating member 33, thereby restricting the regulated member 36 from inertia or rotational driving. Therefore, the regulated member 36 always stops at a predetermined position.
[0071]
Although the driven portion side makes 1.5 rotations relative to the driven portion side, the driven portion side always stops at the initial position, so the driven portion side always stops at a position reversed 180 degrees.
[0072]
The control unit 25 controls the timing of application and cutting of the adhesive tape T in the application unit 2, and the rotation speed of the motor M for applying the adhesive tape T at a speed according to the type of can, and the motor M This is for controlling the stop timing of the rotation via the inverter 28. The rotational speed and stop timing of the motor M are stored in the memory 45 provided in the control unit 25 in advance by experiments. A specific example will be described below with reference to the flowchart of FIG.
[0073]
<Step S1> Initial setting
According to the type (for example, size) of the can that can be set on the turntable 5, the inverter 28 is changed in increments of 1 Hz, for example, from 25 to 75 Hz, and the operation unit 8 can perform the adhesive tape T application experiment four times for each frequency. Input settings from.
[0074]
<Step S2> Start of actual measurement
A predetermined encoder is set and the motor M is driven to rotate, and the rotary encoder 39 determines the number of pulse signals obtained by dividing 1000 rotations of the rotation shaft 38 of the main drive unit 29 or 1.5 rotations of the rotation shaft 41 on the driven unit side. In addition to counting, the sensor detects when the regulating member 33 makes one rotation and reaches the initial position.
[0075]
<Step S3> Calculation of motor stop time
The number of pulse signals when the initial position is detected by the sensor is obtained. Further, the number of stop pulse signals when the restricting member 33 is overrun and stopped is obtained. Obtain the difference between the number of stop pulses and the number of pulse signals for which the initial position has been counted, and subtract this difference from the number of pulse signals for which the initial position has been detected to regulate the number of pulse signals after the motor stops. The number of pulse signals that stop when the member 33 overruns and does not exceed the initial position.
[0076]
<Step S4> Has the number of experiments for each frequency been reached?
It is determined whether a predetermined number of experiments has been performed for each frequency. If the predetermined number of experiments has been reached, the process proceeds to the next step S5. If the predetermined number of experiments has not been reached, the operations from step S2 are repeated.
[0077]
<Step S5> Average processing of measurement results
In step S3, the number of pulse signals, which is a stop condition for each motor M, obtained by four experiments performed for each frequency is averaged for each frequency.
[0078]
<Step S6> Have all the motor stop conditions been found?
If the motor stop condition (number of pulse signals) is obtained for each frequency, it is stored in the memory 45 of the control unit 25, and the experiment for setting a series of conditions ends. If acquisition of motor stop conditions for all frequencies has not been completed, the operations from step S1 are repeatedly executed.
[0079]
By controlling the stop timing of the rotation drive of the motor M based on the motor stop condition set as described above, the motor M is stopped by a single operation from the set predetermined number of revolutions as shown in FIG. Can be made. Therefore, since the adhesive tape can be applied to the can while maintaining the top speed of a predetermined rotational speed corresponding to the type (for example, size) of the can, the adhesive tape can be applied efficiently in the shortest time. .
[0080]
Next, returning to FIG. 6, the turntable 5 is for holding and rotating the can K and is connected to the attachment portion 6 of the driven portion 30 in the drive unit 27. As shown in FIG. 10, the turntable 5 has a disk shape and is a large block 46 (46 a, 46 a, 46) having a pair of substantially rectangular shapes that are opposed to each other in the radial direction (Y-axis direction in FIG. 10) and can slide. 46b) and one small block 47 which is orthogonal to the large block 46 and which can slide in the radial direction (X-axis direction in FIG. 10) is provided on the surface. The large-diameter block 46 and the small block 47 correspond to a regulating member that performs alignment (centering) of the can K.
[0081]
The large block 46 is for adjusting the position in the Y-axis direction when centering the can K, and sandwiches the can from the vertical direction of the Y-axis. Each of the large blocks 46a and 46b has three guide pins 48 projecting from the upper part toward the lower part, and these guide pins 48 are on the surface of the turntable 5, that is, on the X axis. It is inserted into three guide holes 49 which are long holes provided at equal intervals in parallel with the radial direction.
[0082]
Further, pulleys 50 that are rotatably supported are provided on both ends of the rear surface of the turntable 5 in the Y-axis direction, and a belt 51 is stretched around the pulleys 50. Further, the belt 51 is held by a holding member 52 provided on a guide pin 48 provided at the center of the large block 46.
[0083]
The position where the large blocks 46a and 46b are gripped by the belt 51 is such that the large block 46a is gripped by one of the two belts 51 parallel to each other with the pulley 50 in between, and the large block 46b is rotated by the other belt 51. It is held at a position equidistant from the shaft 41.
[0084]
In other words, when one of the large blocks 46 is slid and moved, the gripped belt 51 is rotated via the pulley 50, and the other large block 46 is also driven in conjunction with the operation. Specifically, when one large block 46a is moved in the center direction from the end side, the other large block 46b is also moved in the center direction from the end side. Further, when one large block 46a is moved in the radial direction from the center side, the other is similarly driven in the radial direction from the center side.
[0085]
As shown in FIG. 12, the small block 47 has one guide 53 protruding at the lower portion thereof, and this guide 53 is formed on the surface of the turntable 5, that is, on the X axis. It is inserted into a guide hole 54 that is a long hole and attached to a rack 55. That is, the small block 47 can be slid and moved on both ends of the turntable 5 on the X-ray by the rack 55 and the pinion 56 shown in FIG.
[0086]
Further, as shown in FIG. 11, the rack 55 and the pinion 56 are covered with a rack cover 57. When the small block 47 is moved, a gap is generated between the rack 55 and the pinion 56 so that gears do not fly. Holding. Further, as shown in FIG. 10, the small block 47 is provided with a stopper 63 so as to stop at a position where it can be centered according to the size of the can to be set.
[0087]
Further, it is preferable that the small block 47 has an arcuate contact surface according to the roundness of the can to be set.
[0088]
Returning to FIG. 1, the presser part 7 holds the can K from above, and the height of the holding part 58 can be changed according to the type (height) of the can K. The holding portion 58 is rotatably supported at the lower portion of the tip of the L-shaped arm 59 attached to the guide rail of the presser portion 7. That is, the handle 60 provided on the upper part of the presser unit 7 is rotated forward / reversely so that the L-shaped arm 59 is moved up and down along the guide rail by a drive mechanism (not shown), and the holding unit 58 is also moved along with this movement. Move up and down. Further, when the can K is set and the turntable 5 is rotated, the holding unit 58 is rotated following the rotation.
[0089]
Next, a series of operations for attaching and sealing an adhesive tape across the can body and the lid using the above can sealer will be described.
[0090]
The can to be sealed is placed on the turntable 5, and the operation plate 3 is moved up and down to adjust the position (height) to which the adhesive tape T is applied and to perform centering. Specifically, the small block 47 is slid and moved in the X-axis direction while sliding the can in the direction of arrow B in FIG. 10, and the large block 46 in the Y-axis direction is slid to move the can. Clamp the centering.
[0091]
When centering is completed, a screw or pin-like stopper 63 is inserted into the guide hole and fixed so that the small block 46 moves in the radial direction and the centering position of the can does not shift. Further, the handle 60 of the presser unit 7 is operated to adjust the position of the holding unit 58 that holds the can from above.
[0092]
When the setting of the cans is completed, the number of rotations of the motor M and the sticking timing of the adhesive tape T according to the type of can sealed from the operation unit 8 (operation timings of the first sticking mechanism 12, the cutting mechanism 13 and the second sticking mechanism 14) ) Is selected and set, and the start button is pressed. It should be noted that selection / setting of the number of rotations of the motor M in the present embodiment may be performed once for a can of the same shape to be sealed. In other words, once selection / setting is performed for the first time, it is not necessary to select / set again every time the can is sealed.
[0093]
The rotation of the motor M is transmitted to the main drive unit 29 of the drive unit 27. Specifically, when the rotating shaft 38 rotates, the regulating member 33 that is in an engaged state is disengaged from the regulated member 36, the main driving gear 32 and the driven gear 40 are engaged with each other, and the driving force is transmitted to the driven unit side. 5 rotates.
[0094]
The number of pulse signals sequentially counted from the rotary encoder 39 in accordance with the rotation drive is sent to the control unit 25, and the number of timing pulses set in advance for operating each mechanism in the pasting unit 2 Comparison processing is performed. As a result of the comparison processing, when the number of predetermined pulse signals is counted, the first pasting mechanism 12 is operated, and the arm 15 is swung from the standby position to the operating position. At this time, the first sticking roll 16 at the end of the arm abuts on the can, and the tape guide 17 feeds out the sticking tape T while sticking the sticking tape T to the fitting portion between the can body and the lid. .
[0095]
When the first sticking mechanism 12 operates, the arm 23 of the second sticking mechanism 14 swings from the standby position to the operating position substantially simultaneously. That is, the second sticking roll 24 sticks the adhesive tape T to the can so as to follow the first sticking roll 16.
[0096]
When the application of the adhesive tape T in the first application mechanism 12 is completed, the first application mechanism 12 returns from the operating position to the standby position.
[0097]
Next, when the number of each predetermined pulse signal is counted before the rotation of the adhesive tape T is finished and the rotation is stopped, the cutting mechanism 13 is operated according to the number of the signals, and the arm 21 is moved to the standby position. The adhesive tape T is cut by the cutter blade 22 at the tip of the arm.
[0098]
When the adhesive tape T is cut, the arm 21 of the cutting mechanism 13 returns to the standby position. At this time, the second sticking roll 24 of the second sticking mechanism 14 sticks the end of the adhesive tape T cut by the cutter blade 22 to the can.
[0099]
When the application of the end of the adhesive tape T is completed, the arm 23 of the second application mechanism 14 returns from the operating position to the standby position.
[0100]
In addition, the number of pulse signals counted by the rotary encoder 39 in the process of applying the adhesive tape T and the preset number of motor stop timing pulses were sequentially compared, and the number of motor stop timing pulses was counted. At that time, the motor M is stopped. Immediately before the motor is stopped, the rotational drive to the driven gear 40 is interrupted at the toothless portion of the main drive gear 32, and instead, the rotary drive from the drive transmission member 34a is transmitted to the driven unit side and the driven unit side continues. Rotate.
[0101]
In the course of this rotation, the restricting member 33 is engaged with the restricted member 36, and when the members are engaged with each other, the motor M is stopped and the drive unit 27 is completely stopped. As a result, the turntable 5 is rotated. Stop.
[0102]
In addition, since the driven gear 40 rotates 1.5 times while the main driving gear 32 rotates, the adhesive tape T is attached to the pasting end portion of the adhesive tape T in an overlapping manner. The overlapping portion or the pasting length of the adhesive tape T can be arbitrarily set by changing the number of timing pulses for pasting the adhesive tape T. For example, the adhesive tape T may be partially affixed to 1/2, 1/3,... Of the circumference without being affixed around the can one or more times, or may be affixed approximately 1.5 times.
[0103]
Further, since the turntable 5 also rotates 1.5 times, the small block 47 is located on the side of the can insertion direction B shown in FIG. In this state, the processed can is taken out and a new can to be sealed is inserted from the direction of arrow B in FIG. At this time, the small block 47 slides along the guide hole 54, stops at the stopper 63 on the other end side, and is centered. When the centering of the can is completed, the above-described series of operations is repeated, and the adhesive tape T is attached to the fitting portion between the can body and the lid member and sealed.
[0104]
As described above, the main driving portion 29 including the main driving gear 32, the regulating member 33, and the drive transmission member 34 a, the regulated member 36 that engages with the regulating member 33, and the driven gear 40 that meshes with the main driving gear 32. The turntable 5 is rotated and stopped through a drive unit 27 composed of a driven unit 30 formed as described above, and a pasting mechanism interlocked with a cam mechanism combined with a clutch, a mechanical brake mechanism, and a limit switch as in the past. The adhesive tape T can be attached more efficiently than by attaching the adhesive tape to the can by the mechanism.
[0105]
Specifically, immediately before the rotation shaft 38 of the main driving portion 29 makes one rotation, the transmission of the rotation drive from the main driving gear 32 to the driven gear 40 is interrupted at the missing tooth portion of the main driving gear 32, and instead, a drive transmission member 36 a engages with the engaging portion 36 of the regulated member 36, and the rotational drive is transmitted to the driven portion 30.
[0106]
Next, when the drive transmission member 34a is disengaged, the convex portion 35 of the regulating member 33 is engaged with the concave portion 37 of the regulated member 36, and at this point, the rotational drive of the motor M is stopped. Therefore, the inertia or rotational driving of the regulated member 36 is regulated by the regulating member 33, and the regulated member 36 can be always stopped at a predetermined position, and as a result, the turntable 5 can also be stopped at a predetermined position. it can.
[0107]
Since the turntable 5 stops at a position that is 1.5 rotations from the initial position, that is, 180 degrees off, the small block 47 is positioned before the can is inserted, but the can is pushed to the small block 47 in this state. If it is slid into contact, the small block 47 slides along the guide hole 54 and stops at the stopper 63 on the other side so that the can can be centered. As a result, the can is always inserted and set from a predetermined direction. be able to.
[0108]
Further, the stop timing of the rotational drive of the motor M is set such that the restricting member 33 and the restricted member 36 are engaged with each other according to the type of can set in the memory 45 of the control unit 25 and the restricting member 33 is in the initial position. The comparison is made by comparing the number of timing pulses (reference value) at the time of stopping with the number of pulse signals counted by the rotary encoder 39 (actually measured value). Therefore, since the motor M is brought into a stop operation by a single operation from a predetermined top speed corresponding to the can, it is not necessary to control the overrun of the turntable 5 by gradually decreasing the speed as in the prior art. As a result, the adhesive tape T can be efficiently attached to the can in a short time.
[0109]
The present invention is not limited to the embodiment described above, and can be modified as follows.
[0110]
(1) In the above embodiment, centering of the can placed on the turntable 5 is centered by one large block 46 and one small block 47, but there are a plurality of cans depending on the shape of the can. Centering may be performed using a set of blocks.
[0111]
(2) In the above-described embodiment, the operation plate 3 is configured to move up and down, but may be configured to be movable and adjustable in the front-rear or left-right direction.
[0112]
【The invention's effect】
As is apparent from the above description, according to the present invention, when the driving means is stopped and the driven gear is positioned at the missing tooth portion of the main driving gear, transmission of the driving force from the main driving gear to the driven gear is interrupted. Along with the interruption of the transmission of the driving force, the driving transmission member engages with the regulated member, and the driven gear side is continuously rotated. In the process of this rotational drive, the regulating member engages with the regulated member, and the inertia or rotational driving of the regulated member is regulated by the regulating member and stops reliably. Accordingly, the turntable to which the rotational drive of the regulated member and the driven gear is also stopped, so that the turntable can always be stopped at a predetermined position.
[Brief description of the drawings]
FIG. 1 is a schematic side view showing a can sealer according to an embodiment.
FIG. 2 is a schematic plan view showing a can sealer according to an embodiment.
FIG. 3 is a plan view showing a schematic configuration of a sticking part.
FIG. 4 is a plan view showing a main configuration of a first sticking mechanism.
FIG. 5 is a perspective view showing a main configuration of a first sticking mechanism.
FIG. 6 is a side view showing a schematic configuration of a drive unit.
FIG. 7 is a plan view showing a schematic configuration of a drive unit.
FIG. 8 is a flowchart showing a memory setting procedure of the control unit.
FIG. 9 is a diagram showing the motor rotation speed and stop timing when an adhesive tape is applied.
FIG. 10 is a plan view showing a schematic configuration of a turntable.
11 is a cross-sectional view taken along the line AA in FIG.
12 is a cross-sectional view showing a main configuration of the small block portion of FIG.
FIG. 13 is a side view showing a schematic configuration of a drive system of a conventional device.
FIG. 14 is a diagram showing the motor rotation speed and stop timing when an adhesive tape is applied to a conventional can sealer.
FIG. 15 is a perspective view showing a main part configuration of a pasting part of a conventional can sealer.
[Explanation of symbols]
2 ... Paste
4 ... Actuator height adjuster
5… Turntable
7 ... Presser part
8 ... Operation part
25 ... Control unit
27… Drive unit
32 ... Main gear
33 ... Restriction member
34a ... Drive transmission member
36 ... Restricted member
36a ... engaging portion
40… Driven gear

Claims (5)

A turntable for placing a can fitted with a can body and a lid, driving means for generating a driving force for rotating the turntable, and driving force from the driving means are transmitted to the turntable. A can sealer comprising a drive unit, a tape applying means for attaching an adhesive tape across the fitting portion of the can body and the lid, and a cutting means for cutting the attached adhesive tape,
The drive unit includes a main driving gear and a driven gear for passively transmitting a driving force from a driving means to the turntable,
The main driving gear has a missing tooth portion for interrupting transmission of rotational driving to the driven gear, and a pair of drive transmissions for transmitting rotational driving to the driven gear side instead of the main driving gear in the missing tooth portion. A member is provided, and a restricting member for restricting the rotational drive of the driven gear is provided between the pair of drive transmission members on the rotation shaft of the main gear,
The driven gear is provided with a regulated member on its rotating shaft,
The regulated member has an engaging portion with which the drive transmission member is engaged,
The can sealer is characterized in that when the transmission of the driving force from the driving means is stopped, the regulating member on the main gear side and the regulated member on the driven gear side are engaged to stop the driving of the driving unit. . The can sealer according to claim 1,
A can sealer comprising control means for controlling a stop timing of the drive means so as to stop the rotational drive of the drive unit at a position where the restricting member and the restricted member are engaged. The can sealer according to claim 1 or 2,
Counting means for counting the rotation as an equally divided pulse signal in the course of one rotation of the main gear,
A memory that stores in advance the number of timing pulses that serve as a reference for the drive unit to stop when the regulating member and the regulated member are engaged when the adhesive tape is applied at a rotational speed corresponding to the type of can; With
The control means compares the number of pulse signals counted by the counting means with the number of predetermined timing pulses stored in the memory, and the number of pulse signals counted by the counting means and the number of predetermined timing pulses. The can sealer is characterized in that the driving means is stopped when the two coincide with each other. The can sealer according to any one of claims 1 to 3,
The restricting member has a protruding part with a tip protruding in an arc shape,
The regulated member has a concave portion having an arcuate tip. The can sealer according to claim 4,
The restriction member has one convex portion,
The regulated member has two concave portions at both ends in the diameter axis direction of the rotating shaft,
The can sealer is characterized in that the rotation ratio between the main driving gear and the driven gear is 1.5 rotations of the driven gear with respect to one rotation of the main driving gear.

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