JP2591192Y2 - Packing machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing machine,
The present invention relates to a packing machine capable of automatically or semi-automatically performing a work of winding a tape-shaped band made of a thermoplastic resin such as polypropylene around an object to be packed and welding and bonding a polymerized portion of the tape-shaped band.

[0002]

2. Description of the Related Art In general, a tape-shaped band made of a thermoplastic resin is wrapped around an object to be packed, and the band is tightened. A packing machine has been already put into practical use, in which heat melting and pressure bonding is performed, and the work up to the cutting is automatically or semi-automatically performed. That is, as is well known, this type of packing machine rotates a camshaft and various cams fitted and fixed to the camshaft by a driving force from an electric motor, and presses, a heater plate, A mechanism such as a slide table is operated at a shifted timing to perform banding work such as gripping, pressing, melting, and cutting of a band (for example, Japanese Patent Publication No. 3-69774, Japanese Patent Application Laid-Open No. 64-586).
No. 13).

In addition, the applicant of the present invention has previously provided a motor for feeding and tightening (feed / back feed) of a band of a packing machine and a motor for driving a cam, as quickly as possible in accordance with the number of pulses. It has been proposed in Japanese Patent Application No. 5-179262 or the like to use a stepping motor capable of precisely controlling the rotation speed and the amount of movement.

[0004]

In the conventional packing machine as described above, maintenance operations such as operation confirmation of various operation mechanisms including a feed / back feed motor or a cam drive motor and pressure adjustment between various rollers are performed. In this case, it is necessary to manually rotate the output shafts of these motors. Therefore, the rollers fixed to the output side of the output shaft, various cams or operating plates must be operated manually, and various inspections and adjustments must be performed while observing the situation, which makes maintenance work very troublesome. There was a point.

On the other hand, since the stepping motor rotates by repeating the step rotation for each input pulse, some vibration is always generated. In particular, when the natural frequency of the rotating system coincides with the driving frequency, a resonance phenomenon occurs. Occurs, and when the vibration is further increased, there is a problem that stoppage, misstep, or reverse rotation due to step-out occurs. The present invention has been made in view of such a problem, and its object is to easily and quickly perform maintenance work such as operation confirmation and adjustment of various operation mechanisms and motors, and to perform vibration and noise. Can be prevented, and moreover,
An object of the present invention is to provide a packing machine that can be configured at low cost and easily.

[0006]

In order to achieve the above-mentioned object, a packing machine according to the present invention comprises a band supplying and tightening means for performing operations such as feeding and tightening of a band wound around the outer periphery of an object to be packed. A band supply end processing unit for performing operations such as gripping, pressing, melting, and cutting the band by operating a plurality of cams; a feed / back feed motor that is a driving source of the band supply / tightening unit; A cam drive motor for driving a cam, wherein at least one of the feed / back feed motor and the cam drive motor comprises a stepping motor, and operates on an output shaft of the stepping motor. The present invention is characterized in that a resonance preventing damper which also serves as a checking means or a resonance preventing damper or an operation checking means is provided.

[0007]

[Operation] In the packing machine according to the present invention configured as described above, it is possible to rotate the output shaft by manually operating the operation check means attached to the output shaft of the stepping motor, Accordingly, maintenance work such as operation confirmation and adjustment of not only the motor but also various operation mechanisms can be performed easily and quickly. In addition, since the torsional vibration can be absorbed by the inertia (inertial force) of the resonance preventing damper, the generation of vibration and noise can be prevented as much as possible.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic plan view of a packing machine according to the present invention in which a top plate is removed to show the entire inside of the packing machine, FIG. 2 is a schematic front view, and FIG. 3 is a schematic side view taken along the line III-III of FIG. is there.

In FIGS. 1 to 3, a packing machine 1 according to this embodiment is shown.
Is a column 3 equipped with casters 2, 2, ... at the lower end,
, A top plate 4 mounted and attached horizontally on the upper ends of the columns 3, 3, ..., a side plate 5 attached around four side surfaces, and a side plate 5 A substantially box-shaped packing machine main body 10 including an inspection port and the like (not shown) provided at an appropriate position so as to be freely opened is provided as a frame member. Further, a band guide arch (not shown) is formed on the upper part of the packing machine main body 10 and formed of a cylindrical body formed in a downward substantially U-shape to automatically arrange the band B around the article to be packed. Can be installed as needed. Moreover, the said support | pillar 3,3,
.., The top plate 4 is integrally formed of, for example, an extruded aluminum material.

A band reel 6 in which a band coil can be loaded is installed inside the packing machine main body 10 with its central axis 6a facing sideways. In addition, a plate-like support plate 11 extending horizontally and horizontally is fixedly mounted in an upper portion of the inside of the packing machine main body 10 on the opposite side (the right side in FIGS. 1 and 2) to the side where the band reel 6 is installed. And the support plate 11
A frame 12 having a substantially U-shaped horizontal cross section is mounted and fixed on the upper surface of the frame. Between the left and right side plates 12a and 12b of the frame 12, a band supply end processing means K (which will be described later in detail) including various cams and arms for performing operations such as gripping, pressing, melting, and cutting the band B. Are arranged. Also, the left side plate 12a of the frame 12
The cam driving stepping motor M ₁ with the speed reducer 7 for driving the band supply end processing means K is provided on the outer surface of the motor.
Are lined up, and on the outer side of the right side plate 12b,
Forward and reverse rotatable feed backfeed stepping motor M _2, the feed-back feed roller 8, the rocker roller band supply and consists of 9, etc. tightening (feed back feed) means F are juxtaposed fixed.

Next, details of the packing machine 1 of the illustrated example will be described. 4 is an enlarged view of a main part of FIG. 2, and FIG. 5 is an enlarged view of a main part of FIG. First, the band supply end processing means K will be described. The cam driving stepping motor M ₁
Is reduced by the speed reducer 7 and transmitted to the camshaft 14 supported by the rolling bearing 13. The camshaft 14 is laid between both side plates 12a and 12b of the frame 12,
The right side plate 12b is axially supported by a rolling bearing 15.

As shown in FIG. 4, a heater cam 21, a front clamp cam 22, a press cam 23, a slide cam 24,
The rear clamp cam 25 and the middle slide cam 26 are fitted and inserted into the camshaft 14 and fixed by the key 16. Each of the cams 21 to 26 is
It is formed by laminating two plate members of the same shape punched and formed into a predetermined cam shape by a press. In the gap formed between the cams 21 to 26 adjacent to each other, a circular shape of the same shape made of plastic or the like, which is inserted through the camshaft 14 concentrically with the cams 21 to 26. Are interposed, and the spacers 17, 17,..
1 to 26 are fixed together by bolts 18, 18.

A front clamp 40 that moves up and down following the rotation of the front clamp cam 22 is disposed between the left and right side plates 12a and 12b. The front clamp 40 is formed integrally with a spring-fitting insertion portion 41 having a gate-shaped cross-section, and can be rotatably locked to a pivot shaft 42 at the base end. Notch ring part 43a
Is formed of an elongated plate-shaped arm 43 formed with a head, and a head 45 fixed to the upper part of the spring fitting portion 41 with a bolt or the like. This front clamp 40
The head part 45 is formed with a guide hole 44 for guiding a band when the band is supplied.

On the inner side surfaces of the left and right legs of the gate-shaped cross section of the spring insertion section 41, the spring insertion section 41 extends laterally (rightward in FIG. 5) in parallel with the arm section 43. Stiffened steel cam roller support member 51,
51 are attached. The cam roller support member 51,
A spring member 46 having a buffering action is fitted and inserted in an upper portion of 51, and a cam roller 52 that swings following the front clamp cam 22 is sandwiched in a lower portion of the spring member 46. Then, the base end portion 5 of the cam roller support member 51, which is pivotally fixed to the arm portion 43 of the front clamp 40.
1a, the cam roller 52 is attached to the front clamp cam 2;
A spring member 53 that urges the support plate 2 is pressed between the support member 11 and the spring member 53.

Similarly, the press 55 and the rear clamp 56 have substantially the same structure as the front clamp 40, and cam rollers 57, 58 which swing following the press cam 23 and the rear clamp cam 25, respectively. (The details of the configuration are omitted.) A cutter member 59 for cutting the band is integrally fixed to the upper end side of the press 55.

Further, as shown in FIG.
A heater member 61, a slide member 62, and a middle slide member 63 are swingably disposed near the upper end portion between a and 12b. The heater member 61 includes a plate-shaped heater plate 64 positioned at an upper end portion, and a heater arm 65 fixed to a lower surface of the heater plate 64 and extending downward.
The heater arm 65 includes the side plates 12a, 1
It is pivotally supported by a pivot shaft 30 laid between 2b. The heater arm 65 is connected to the cam roller 7.
1 and is swingably attached to the heater cam 21 in conjunction with the heater cam 21.

Similarly, the slide member 62 has a plate-shaped slide table 67 fixed to an upper end of a slide arm 66 supported by the pivot shaft 30. The slide arm 66 is swingably attached to the slide cam 24 via a cam roller 72. Further, the middle slide member 63 is disposed on the side opposite to the arrangement of the heater member 61 and the slide member 62 with respect to the pivot shaft 30. That is, the middle slide member 63 is configured such that a middle slide 74 to which the limit switch L is fixed is fixed to an upper end of a middle slide arm 73 supported by the pivot shaft 30. The middle slide arm 73 is swingably attached to the middle slide cam 26 via a cam roller 75. The heater member 6
1. At the lower ends of the respective arms 65, 66, 73 of the slide member 62 and the middle slide member 63, the respective cam rollers 71, 72, 75 are attached to the heater cam 21, the slide cam 24, and the middle slide cam 26. Spring members 76, 76, 76 for urging to be pressed are interposed between the support plate 11 and the spring members 76, 76, 76.

Next, the band supplying / tightening means F will be described. Figure 6 is a longitudinal sectional view of the stepping motor M ₂ feed-back feed. The illustrated stepping motor M ₂ includes a motor body 81 and a gear case 83 integrally fixed to the motor body 81 on the output side of the output shaft 82. The gear case 8
3 is provided in the front (see FIG. 6) via rolling bearings 84 and 85.
The feed / back feed roller shaft 86 protruding from the left side of FIG. In the vicinity of the end of the feed / back feed roller shaft 86 in the gear case 83, a feed / back feed roller rotating gear 88 meshed with a tooth portion 87 engraved at the tip of the output shaft 82 is provided. On the other hand, at the outer end of the feed / back feed roller shaft 86, the feed / back feed roller 8 is fixed. In the vicinity of the periphery of the gear case 83, an attachment shaft 89 for fixing a band guide cover 98 attached to the outside of the front end of the feed / back feed roller 8 projects forward and is fitted. I have. Further, the output shaft 82
A damper 90 for preventing resonance which extends in a direction opposite to the output side and is provided at the tip end thereof, for example, has a disk shape made of brass or the like and has a knurl on the surface and also serves as an operation confirmation means. Have been. The rocker roller 9 is mounted so as to always press against the feed / back feed roller 8 by pressing means (not shown) (see FIG. 4).

As can be seen from FIG. 4, the band B wound around the band reel 6 is fed through the twist roller 92 and the idle roller 93 to the feed belt.
After passing through the pressure contact portion between the back feed roller 8 and the rocker roller 9, the inside of the tubular band guide member 94, the guide hole 44 of the front clamp 40, the gap between the press 55 and the middle slide 74, the rear clamp 56 And sequentially passes through the gap between the slide table 67 and the slide table 67 and exits from the top plate 4 to the outside. Next, the tip of the band B looped around the object to be packed in a loop shape (if a band arch is installed, a loop is formed through the inside of the band arch) is attached to the slide table 67. Is introduced into the packing machine 1 again through the band introduction port 95 formed on the side of the slide table 67, passes through the gap between the slide table 67 and the middle slide 74, and comes into contact with the limit switch L to complete the setting. Is configured.

Next, the operation of the packing machine according to one embodiment of the present invention will be described. First, when the operating the start switch (not shown) control device operating the feed backfeed stepping motor M _2, feed the feed-back feed roller 8 is to start rotating and forwarding the band B (supplied )
And, the band B is as described above, are caused to orbit at a distance around the object to be packed, said being brought into contact with the limit switch L to stop the feed back feed stepping motor M _2, the band The setting of B is completed.

Next, the cam driving stepping motor M ₁ is activated to rotate the front clamp cam 22, and the arm 43 is centered on the pivot shaft 42 by the operation of the cam roller 52 which is a follower thereof. Then, the front clamp 40 is swung upward, and the front end of the band B is clamped by the upper end surface of the front clamp 40 and the lower surface of the slide table 67. At the same time, the stop cam driving stepping motor M ₁ is the feed back feed stepping motor M ₂ is started and starts to rotate in the opposite tightening (backfeed) direction of the supply (feed) direction, Primary tightening is performed by high-speed, low-torque drive. Then, the band B comes into contact with the outer peripheral surface of the article to be packed, and a predetermined value of tension is applied to the band B.
, The feed / back feed stepping motor M ₂ is operated by a tension sensor (not shown) or the like.
The operation mode is automatically switched, and the low-speed / high-torque drive rotation is performed to perform secondary tightening. The operation of the cam driving stepping motor M ₁ is being made to retain the stop position through the primary and secondary tightening period.
Further, it is possible during the primary and secondary tightening, by the action of the resonance prevention damper 90 provided in the feed backfeed stepping motor M _2, is suppressed as much as possible the occurrence of vibration and noise .

[0022] Subsequently, the load tension of the band B by the secondary tightening reaches a set upper limit value of the tension sensor, the stepping motor M ₁ is restarted for the cam drive. Thereby, the rear clamp cam 25 operates, and the rear clamp 56 rises. The rear portion of the overlapping portion of the band B is clamped by the upper surface of the rear clamp 56 and the lower surface of the slide table 67.

Next, the heater arm 65 and the middle slide arm 73 for supporting and fixing the heater plate 64 and the middle slide 74 which are attached to face each other in the width direction of the band B are connected to the heater cam 21 and the middle slide arm 73. Via the cam rollers 71 and 75 which are operated following the rotational movement of the middle slide cam 26,
With the pivot shaft 30 as the center of rotation, rotation is performed so as to advance and retreat in conjunction with each other. That is, the direction in which the middle slide 74 retreats from the overlapping portion of the band B (rightward in FIG. 5).
The heater plate 64 is simultaneously slid in the same direction (rightward in FIG. 5) (guided by the middle slide 74). In this way, the heater plate 64 is attached to the middle slide 7.
4 (see FIG. 4), the band B is inserted into the gap between the overlapping portions of the bands B which are arranged vertically apart from each other at a distance from each other. By the simultaneous squeezing pressure with the press 55 raised by the operation, the melt-press bonding of the opposing surface of the overlapping portion of the band B is performed. Here, the press 55 is first lightly pressed against the overlapping portion of the band B, and then is lowered once. At the same time, the heater plate 64 is pulled out of the band overlap portion (to the left as viewed in FIG. 5), and subsequently,
The press 55 rises again, and the cutter member 59 cuts the band B on the front clamp 40 side. Then, the press 55 is pressed strongly against the overlapping portion of the band B. In this state, the overlapping portion of the band is cooled for a predetermined time (for example, 1 to 1.7 seconds), and the press 55 is lowered. Incidentally, in the press 55 during the pressing operation of the first time was increased, as well as cooling period, the cam driving stepping motor M ₁ is held in the stop position.

Lastly, during the entire process, the slide table 67, which is held at a position substantially in the same horizontal plane as the upper surface of the top plate 4, includes the cam roller 72, which is a follower of the slide cam 24, and the cam roller 72, Slide arm 66
Through the rotation of the pivot shaft 30 in the retreating direction (left direction in FIG. 5) around the pivot shaft 30. On the other hand, while the packing machine is stopped, when performing maintenance work such as checking the operation of the various operating mechanisms including the motor and adjusting the pressure between the various rollers, the resonance preventing damper 90, which is also the operation checking means, is appropriately operated. By rotating, an operation mechanism such as the feed / back feed roller 8 can be operated via the output shaft 82. For example, the feed / back feed roller 8 and the rocker roller 9 can be operated.
The contact pressure between them can be adjusted. Also in the cam driving stepping motor M ₁ when preferably provided similarly resonance prevention damper 90, it is more preferable.

As described above, in the packing machine according to the present invention, the generation of vibration and noise is prevented as much as possible by attaching the resonance preventing damper 90 also serving as the operation checking means to the output shaft of the stepping motor. Maintenance work such as operation confirmation and adjustment of not only the motor but also various operation mechanisms can be easily and quickly performed by manual operation.

As described above, one embodiment of the present invention has been described in detail. However, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the present invention described in the claims for utility model registration. Design changes can be made. For example, in the illustrated example, a disk-shaped resonance-prevention damper having a knurl formed on the surface is used. However, if a surface shape for preventing hand slippage or a process for that is applied. Of course, it does not matter what the shape is. Further, the resonance preventing damper may be formed in a ring shape with a material having a high specific gravity, and an appropriate elastic material may be interposed between the damper and the motor output shaft to further enhance the effect. Needless to say, the operation checking means and the resonance preventing damper may be formed separately, and each may be coaxially mounted on the output shaft of the motor.

[0027]

As will be understood from the above description, according to the present invention, maintenance work such as operation confirmation and adjustment of various operating mechanisms and motors can be performed easily and quickly, and generation of vibration and noise can be reduced. Can be prevented, and
Inexpensive and simple configuration.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a packing machine according to an embodiment of the present invention, in which a top plate is removed to show the entire inside of the packing machine.

FIG. 2 is a schematic front view of the packing machine shown in FIG.

FIG. 3 is a schematic side view taken along the line III-III of FIG. 2;

FIG. 4 is an enlarged view of a main part of FIG. 2;

FIG. 5 is an enlarged view of a main part of FIG. 3;

FIG. 6 shows a feeder provided to the packing machine of one embodiment of the present invention.
FIG. _{5 is} a longitudinal sectional view of a stepping motor M2 for back feed.

[Explanation of symbols]

B band F band supply / tightening means K band supply end processing means M ₁ cam drive motor (stepping motor) M ₂ feed / back feed motor (stepping motor) 82 output shaft 90 operation confirmation means (resonance prevention damper)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-64-58613 (JP, A) JP-A-1-124516 (JP, A) JP-A-3-56504 (JP, U) 69774 (JP, B2) (58) Field surveyed (Int. Cl. ⁶ , DB name) B65B 13/00-13 / 34,27 / 00-27/1 2

Claims (3)

(57) [Scope of request for utility model registration] 1. A band supply and tightening means F for performing operations such as feeding and tightening of a band B wound around an outer periphery of an article to be packed, and gripping and pressing of the band B by operating a plurality of cams 21 to 26. Supply end processing means K for performing operations such as melting, cutting and the like, and said band supply / tightening means F
Feed / back feed motor M ₂ which is the driving source of
And a cam drive motor M ₁ for driving the cams 21 to 26, wherein the feed / back feed motor M ₂ and the cam drive motor M ₁ are provided.
A packing machine characterized in that at least one of the steps ( ₁ ) comprises a stepping motor, and an operation confirmation means (90) is provided on an output shaft (82) of the stepping motor. 2. A band supply and tightening means F for performing operations such as sending out and tightening a band B wound around the outer periphery of an article to be packed, and holding and pressing the band B by operating a plurality of cams 21 to 26. Supply end processing means K for performing operations such as melting, cutting and the like, and said band supply / tightening means F
Feed / back feed motor M ₂ which is the driving source of
And a cam drive motor M ₁ for driving the cams 21 to 26, wherein the feed / back feed motor M ₂ and the cam drive motor M ₁ are provided.
A packing machine characterized in that at least _one of them comprises a stepping motor, and a resonance preventing damper 90 is provided on an output shaft 82 of the stepping motor. 3. A band supply and tightening means F for performing operations such as feeding and tightening of a band B wound around the outer periphery of an article to be packed, and gripping and pressing of the band B by operating a plurality of cams 21 to 26. Supply end processing means K for performing operations such as melting, cutting and the like, and said band supply / tightening means F
Feed / back feed motor M ₂ which is the driving source of
And a cam drive motor M ₁ for driving the cams 21 to 26, wherein the feed / back feed motor M ₂ and the cam drive motor M ₁ are provided.
At least one of ₁ a stepping motor, the packaging machine, characterized in that a output shaft 82 resonance prevention damper 90 that also serves as a operation confirmation means of the stepping motor.