JP6185774B2 - Conveying device and packaging machine - Google Patents

Description

  The present invention relates to a transport device that transports an article and a packaging machine including the transport device.

  In a line for pillow-wrapping articles such as foods and daily necessities, articles are supplied one after another to a pillow packaging machine, and individually pillow-wrapped by a packaging material such as a film to produce a pillow package.

  Along with the sequential supply of articles to the pillow packaging machine, the packaging material is unwound from the raw film and continuously supplied to form a bag. Articles are sequentially provided to the packaging material in the process of making the packaging material into a cylindrical shape. Next, in the center seal device, both end edges (center seal portions) in the width direction of the packaging materials stacked on each other are heated while being sandwiched between a pair of bar sealers, whereby the center seal (vertical seal) ) Then, in the top seal device, for each pitch according to the length of the article, the top seal (lateral seal) and cut are performed in the width direction of the packaging material, and the pillow package is manufactured.

  The supply of the article to the pillow packaging machine is performed by a conveying device such as a belt conveyor that carries the article and continuously conveys the article. In the conveyance device described in Patent Document 1, maintenance such as component replacement and cleaning is facilitated by a structure in which the belt can be attached and detached.

Japanese Patent No. 5038846

  However, in the transport device described in Patent Document 1, it is necessary to remove the bracket with a tool when attaching and detaching the belt, which is troublesome.

  This invention is made | formed in view of the said subject, and it aims at providing the conveying apparatus which can attach or detach a belt easily, and a packaging machine provided with the same.

  (1) The present invention includes an endless belt serving as an article conveyance surface, a driving roller that contacts the inner peripheral surface of the endless belt and rotates the endless belt by power from a power source, and the endless belt A driven roller that is in contact with the inner peripheral surface of the belt and rotates as the endless belt travels; a tension roller that is provided so as to be able to contact with and retract from the endless belt, and that can apply and release tension to the endless belt; And the drive roller is movably bridged between the left and right frames in an axial direction, and the driven roller is detachably bridged between the frames.

  (2) The present invention also includes an internal gear fixed to the drive roller so as to be coaxial with the drive roller, a spline shaft that is rotated by power from the power source and has irregularities that mesh with the internal gear, It is provided with this. It is a conveyance apparatus as described in said (1) characterized by the above-mentioned.

  (3) The present invention also includes a top seal device that seals and cuts a film formed in a cylindrical shape while wrapping an object to be packaged between a pair of top sealers in the width direction, and the top seal device. And two transport devices that transport the packaged body as the article, and at least one of the two transport devices is the transport device according to (1) or (2) above It is a packaging machine characterized by being.

  According to the conveying device described in (1) and (2) of the present invention and the packaging machine described in (3), after the tension roller is retracted from the endless belt and the endless belt is loosened, The driven roller is removed from the frame, and the driving roller is moved in the axial direction to escape from the endless belt, whereby the endless belt can be passed between the frames and removed upward. For this reason, a belt can be easily attached or detached without using a tool.

It is the schematic of the pillow packaging machine which concerns on embodiment of this invention. It is an external appearance perspective view of a 1st conveying apparatus. It is the schematic explaining operation | movement of a 1st conveying apparatus, (A) shows the state which the conveyance surface contracted, (B) shows the state which the conveyance surface expanded. It is the schematic explaining operation | movement of a 1st conveying apparatus, (A) shows the state which fixed the tension roller in the fixed position, (B) shows the state which made the tension roller free from the fixed position, (C ) Shows a state in which the tension roller is retracted from the fixed position. It is the schematic explaining operation | movement of a 1st conveying apparatus, (A) shows the state which pressed the tension roller to the endless belt, (B) shows the state which retracted the tension roller from the endless belt. It is the schematic explaining operation | movement of a 1st conveying apparatus, (A) shows the state which fixed the drive roller to the fixed position, (B) shows the state which made the drive roller free from the fixed position, (C ) Shows a state in which the drive roller is retracted from the fixed position.

  Hereinafter, with reference to drawings, the composition of pillow packing machine 1 concerning the embodiment of the present invention is explained. FIG. 1 is a schematic view of a pillow packaging machine 1. In addition, in this figure and each subsequent figure, one part structure is abbreviate | omitted suitably and drawing is simplified.

  A pillow packaging machine 1 shown in FIG. 1 is used in a line for sequentially packaging articles XA1 such as food and daily necessities. The pillow wrapping machine 1 includes an article supply device 2, a packaging material supply device 3, and a packaging machine body 4.

  Each part of the pillow wrapping machine 1 is comprehensively controlled by a control unit (not shown). The control unit includes a CPU, a RAM, a ROM, and the like, and executes various controls. The CPU is a so-called central processing unit, and various programs are executed to realize various functions. The RAM is used as a work area for the CPU. The ROM stores a basic OS and programs executed by the CPU.

  The article supply device 2 conveys the article XA1 at regular intervals and sequentially supplies the article XA1 to the downstream packaging machine body 4. This article supply apparatus 2 is configured by a finger conveyor. Specifically, the article supply apparatus 2 includes a conveyance surface (not shown) having a slit, a side guide (not shown) for guiding the article XA1 on the conveyance surface from the side, and a drive sprocket (not shown). A driven sprocket 5, an annular chain 6 that travels by being hooked on these sprockets, a plurality of fingers 7 that are attached to the chain 6 at equal intervals, and a servo motor that is a power source (not shown) ) And.

  The drive sprocket is rotated by the drive of the servo motor. The driven sprocket 5 rotates in conjunction with the driving sprocket as the chain 6 travels. The chain 6 travels so as to circulate by the rotation of the driving sprocket. The plurality of fingers 7 protrude upward from below the conveyance surface via the slits. The plurality of fingers 7 travel on the conveying surface by the travel of the chain 6. Accordingly, the plurality of fingers 7 push the article XA1 on the transport surface and send it out to the packaging machine body 4.

  The packaging material supply device 3 continuously supplies a packaging material YA1 such as a strip-shaped film. Specifically, the packaging material supply device 3 includes a pair of original fabric shafts 8 that hold the original fabric roll YB1, and guide rollers 9 that guide the packaging material YA1 fed out (stretched) from the original fabric roll YB1. And. The pair of original fabric shafts 8 is provided so as to be rotated by a drive motor (not shown), and holds the original fabric roll YB1. One of the pair of raw rolls YB1 is used, and the other is used as a spare. The guide roller 9 guides the packaging material YA1 stretched from the original roll YB1 into a strip shape and supplies it to the packaging machine body 4. As a method of paying out the packaging material YA1 from the original fabric roll YB1, instead of adopting the above-mentioned original fabric driving method, a feed roller is provided separately, and the feed roller is moved to draw out the packaging material YA1. A driving method may be adopted.

  The packaging machine body 4 packages the article XA1 supplied from the article supply device 2 with the packaging material YA1 supplied from the packaging material supply device 3. Specifically, the packaging machine body 4 includes a bag making device 10, a pinch roller 11, a center seal device 12, a first transport device 13, an upper presser device 14, and a top seal device (end seal device) 15. And a second transport device 16.

  The bag making device 10 forms the packaging material YA1 supplied from the packaging material supply device 3 into a cylindrical shape so that both end edges in the width direction overlap each other. Further, the bag making device 10 supplies the article XA1 supplied from the article supply device 2 to the packaging material YA1 that is bag-formed in a cylindrical shape. Thereby, the article XA1 is wrapped in the packaging material YA1 that is formed into a cylindrical shape.

  The pinch roller 11 sandwiches both end edges (hereinafter referred to as a center seal portion) of the packaging material YA1 that overlap each other, and applies a conveying force to the center seal portion.

  The center seal device 12 includes a pair of bar sealers 12a and a press roller 12b. The center seal device 12 heats with a pair of bar sealers 12a sandwiching the center seal portion. Then, the center seal device 12 performs center sealing by pressing the heated center seal portion with a press roller 12b.

  The first transport device 13 transports the center-sealed cylindrical packaging material YA1 along with the article XA1 wrapped in the packaging material YA1 onto the transport surface 30a toward the top seal device 15. The first transport device 13 expands and contracts the transport surface 30 a in the transport direction in accordance with the box motion of the top seal device 15. In addition, the 1st conveying apparatus 13 is the principal part of this invention, and it mentions later in detail.

  The upper pressing device 14 is disposed above the first transport device 13 and presses the article XA1 transported to the first transport device 13 together with the packaging material YA1 from above. Thereby, the article XA1 is conveyed while maintaining the horizontal state.

  The top seal device 15 performs top seals in the width direction of the packaging material YA1 for each pitch according to the length of the article XA1 by a known box motion that revolves the pair of upper and lower top sealers 15a and 15b along a predetermined locus. End seal, side seal) and cut. Thereby, pillow package ZA1 is manufactured. For details of the top seal device 15, refer to, for example, Japanese Patent Application Laid-Open No. 09-286413.

  The second transport device 16 transports the pillow package ZA1 from the top seal device 15 on the transport surface 16a. The second transport device 16 expands and contracts the transport surface 16 a in the transport direction in accordance with the box motion of the top seal device 15.

  Next, the structure of the 1st conveying apparatus 13 is demonstrated using FIGS. FIG. 2 is an external perspective view of the first transport device 13. FIG. 3 is a schematic diagram for explaining the operation of the first transport device 13. FIG. 3A shows a state where the transport surface 30a is contracted. FIG. 3B shows a state where the conveyance surface 30a is extended. FIG. 4 is a schematic diagram for explaining the operation of the first transport device 13. FIG. 4A shows a state in which the tension roller 31 is fixed at a fixed position. FIG. 4B shows a state in which the tension roller 31 is free from a fixed position. FIG. 4C shows a state in which the tension roller 31 is retracted from the fixed position. FIG. 5 is a schematic diagram for explaining the operation of the first transport device 13. FIG. 5A shows a state in which the tension roller 31 is pressed against the endless belt 30. FIG. 5B shows a state in which the tension roller 31 is retracted from the endless belt 30. FIG. 6 is a schematic diagram for explaining the operation of the first transport device 13. FIG. 6A shows a state in which the driving roller 23 is fixed at a fixed position. FIG. 6B shows a state in which the drive roller 23 is free from a fixed position. FIG. 6C shows a state in which the drive roller 23 is retracted from the fixed position.

  The first conveying device 13 shown in FIGS. 2 to 6 is a belt conveyor that conveys the article XA1 on the conveying surface 30a. The first transport device 13 employs a mechanism for easily attaching and detaching the endless belt 30. Specifically, the first transport device 13 includes a base (frame) 20, a pair of side plates (frames) 19, a pair of upstream frames (frames) 21, and a pair of downstream frames (frames) 22. , Driving roller 23, a plurality of driven rollers 24, 25, 26, 27, 28, 29, an annular endless belt 30, a tension roller 31, a servo motor (not shown) as a power source, and a power transmission mechanism 32, a tension roller contact / retraction mechanism 33, a drive roller moving mechanism 34, and the like.

  The base 20 constitutes the basis of the first transport device 13. Each part of the first transport device 13 is attached to the base 20. For example, a pair of side plates 19 are fixedly fixed to the base 20, and a pair of upstream frames 21 are fixedly fixed via the pair of side plates 19. A pair of downstream frames 22 is movably provided on the base 20. Further, the base 20 is provided with a driving roller 23 movably in the axial direction via a driving roller moving mechanism 34. Further, the base 20 is provided with a plurality of driven rollers 24 to 29 via frames 19, 21 and 22.

  The pair of upstream frames 21 are fixedly fixed to the base 20 via the pair of side plates 19 so as to be spaced apart from each other along the conveyance direction of the article XA1. The driven rollers 24 and 29 are attached to the pair of upstream frames 21 so as to be bridged. Further, the driven rollers 27 and 28 are attached to the pair of side plates 19 so as to be bridged. Further, each of the pair of upstream frames 21 has a flat portion 21a that supports the endless belt 30 from below. The pair of flat portions 21a are provided with a space therebetween. The presence of the pair of flat portions 21a prevents the endless belt 30 from hanging down due to the weight of the article XA1. Moreover, since a pair of flat part 21a is provided mutually spaced apart, the endless belt 30 can be removed by passing between each other. When the endless belt 30 is removed, the direction in which the endless belt 30 passes between the pair of flat portions 21a may be upper or lower.

  The pair of downstream frames 22 are movably attached to the base 20 at intervals from each other along the conveyance direction of the article XA1 so as to be continuous downstream of the pair of upstream frames 21. That is, the pair of downstream frames 22 are provided so as to be movable in the transport direction so that the transport surface 30a formed by the endless belt 30 is expanded and contracted in the transport direction. The driven rollers 25 and 26 are attached to the pair of downstream frames 22 so as to be bridged. Further, each of the pair of downstream frames 22 has a flat portion 22a that supports the endless belt 30 from below. The pair of flat portions 22 a have the same functions and effects as the pair of flat portions 21 a of the pair of upstream frames 21.

  The drive roller 23 is bridged so as to be movable in the axial direction with respect to the base 20 by a drive roller moving mechanism 34. The drive roller 23 is hooked inside the endless belt 30. Then, the driving roller 23 is rotated regularly or intermittently by the power of the servo motor transmitted by the power transmission mechanism 32. As a result, the drive roller 23 causes the endless belt 30 to travel.

  The driven rollers 24 to 29 are provided in order along the flow of the endless belt 30. The driven roller 24 is detachably mounted on the pair of upstream frames 21. The driven roller 25 is detachably mounted on the pair of downstream frames 22. The driven roller 27 is detachably mounted on the pair of side plates 19. These driven rollers 24, 25 and 27 are hooked inside the endless belt 30. The driven roller 26 is stretched over the pair of downstream frames 22. The driven roller 28 is stretched over the pair of side plates 19. The driven roller 29 is stretched over the pair of upstream frames 21. These driven rollers 26, 28, and 29 are hooked on the outside of the endless belt 30. The driven rollers 24 to 29 rotate in a steady or intermittent manner in conjunction with the driving roller 23 as the endless belt 30 travels. Further, the driven rollers 25 and 26 move integrally with the pair of downstream frames 22 in the conveyance direction, and expand and contract the conveyance surface 30a formed by the endless belt 30 in the conveyance direction. Further, the shaft of the driven roller 28 is slidably inserted into a long hole 19 a formed in the pair of side plates 19. The pair of side plates 19 are respectively formed with bolt holes (not shown) connected to the long holes 19a, and the bolts 35 are inserted into the bolt holes, respectively. The tip of the bolt 35 reaches the inside of the long hole 19a and pushes the shaft of the driven roller 28. With such a configuration, the driven roller 28 performs tension adjustment and meandering adjustment of the endless belt 30.

  The endless belt 30 is hooked in the order of the driven roller 24, the driven roller 25, the driven roller 26, the driven roller 27, the driven roller 28, the driving roller 23, and the driven roller 29, and functions by applying tension to the tension roller 31. To do. The endless belt 30 travels constantly or intermittently so as to circulate by the rotation of the drive roller 23. And the endless belt 30 comprises the conveyance surface 30a along the conveyance direction of the articles | goods XA1. As a result, the endless belt 30 transports the article XA1 placed on the transport surface 30a along the transport direction. The transport surface 30a expands and contracts in the transport direction when the driven rollers 25 and 26 move in the transport direction.

  The tension roller 31 is located between the driving roller 23 and the driven roller 29. The tension roller 31 is provided on the outside of the endless belt 30 by a tension roller contact / retraction mechanism 33 so as to be contacted / retracted. The tension roller 31 is pressed against the endless belt 30 to apply tension to the endless belt 30.

  The power transmission mechanism 32 transmits the power of the servo motor to the driving roller 23 to rotate the driving roller 23. Specifically, the power transmission mechanism 32 includes a spline shaft 40, an internal gear 41, and the like. The spline shaft 40 has irregularities that mesh with the internal gear 41, and is provided at a position where the internal gear 41 is fitted. The spline shaft 40 is rotated by the power from the servo motor to rotate the internal gear 41. The internal gear 41 is fixed inside the drive roller 23 so as to be coaxial with the drive roller 23. The internal gear 41 is inserted into and removed from the spline shaft 40 by being moved integrally with the drive roller 23 in the axial direction of the drive roller 23 by the drive roller moving mechanism 34. The internal gear 41 is rotated with the spline shaft 40 while being inserted into the spline shaft 40, thereby rotating the drive roller 23.

  The tension roller abutment / retraction mechanism 33 applies tension to the endless belt 30 by pressing the tension roller 31 against the endless belt 30, while retracting the tension roller 31 from the outside of the endless belt 30. Loosen the tension of 30. Specifically, the tension roller contact / retraction mechanism 33 includes a pair of support plates 50, a pair of rotating shafts 51, a pair of pins 52, and the like. The pair of support plates 50 are rotatably attached to the pair of upstream frames 21 one by one by a pair of rotating shafts 51. The pair of support plates 50 are attached so as to be rotatable about an axis parallel to the tension roller 31 so that the tension roller 31 is bridged. As a result, the pair of support plates 50 support the tension roller 31 so as to be capable of rotating and revolving (revolving). A pair of pins 52 are attached to the pair of support plates 50 one by one. Instead of the tension roller contact / retraction mechanism 33, an openable type described in Japanese Patent No. 5038846 (particularly, paragraph [0037]) may be provided.

  The pair of pins 52 are operation members for fixing the pair of support plates 50 so as not to be pivotable (see FIG. 4A) while releasing the fixation (see FIG. 4B). The pair of pins 52 is urged by a coil spring (not shown), and the support plate 50 is fixed by fitting the tip into a recess (not shown) formed in the upstream frame 21. By fixing the pair of support plates 50, the tension roller 31 is disposed at a position where the tension roller 31 is pressed to the outside of the endless belt 30 (see FIG. 4A). On the other hand, the pair of pins 52 are pulled against the urging force of the coil spring (see FIG. 4 (A) → FIG. 4 (B)), so that the pair of support plates 50 are released (FIG. 4 ( B)), the pair of support plates 50 can be rotated (see FIG. 4C). That is, the tension roller 31 can be turned (retracted from the outside of the endless belt 30).

  The drive roller moving mechanism 34 moves the drive roller 23 in the axial direction, thereby inserting the internal gear 41 fixed to the inside of the drive roller 23 into the spline shaft 40, while moving the drive roller 23 of the endless belt 30. Retract from the inside. Specifically, the drive roller moving mechanism 34 includes a rail 60, a slider 61, a frame 62, a pin 63, and the like. The rail 60 is fixed to the base 20 so as to be parallel to the drive roller 23. The rail 60 forms a path for the slider 61 to travel. The slider 61 is attached to the rail 60 so as to be able to travel. A frame 62 of the driving roller 23 is fixed to the slider 61. The frame 62 is fixed to the slider 61 and travels in the axial direction of the drive roller 23 together with the slider 61. The frame 62 includes a pair of side plates 62a in which bearings (reference numerals omitted) are embedded, and a connecting member 62b that connects the pair of side plates. The outer periphery of the outer ring of the bearing is engaged with the inner periphery of the holes formed in the pair of side plates 62a. And the outer periphery of the internal gear 41 is engaged with the inner periphery of the inner ring | wheel of one bearing. The outer periphery of the driving roller 23 (or a ring configured integrally with the driving roller 23) is engaged with the inner periphery of the inner ring of the other bearing. As a result, the inner ring of the bearing rotates integrally with the inner gear 41 and the driving roller 23 fixed to the inner gear 41. Thus, the drive roller 23 is rotatably attached to the frame 62. A pin 63 is attached to the slider 61.

  The pin 63 is an operation member for fixing the slider 61 so as not to run (see FIG. 6A), while releasing the fixing (see FIG. 6B). The pin 63 is urged by a coil spring (not shown), and the tip of the pin 63 is fitted into a recess (reference numeral omitted) arranged on the base 20 to fix the slider 61. By fixing the pin 63, the driving roller 23 is disposed at a fixed position (see FIG. 6A). On the other hand, the pin 63 is pulled against the urging force of the coil spring (see FIG. 6 (A) → FIG. 6 (B)), so that the fixing of the slider 61 is released (see FIG. 6 (B)). The slider 61 can be moved (see FIG. 6C). That is, the drive roller 23 can be moved in the axial direction (retracted from a fixed position).

  As described above, according to the first conveying device 13, the tension roller 31 is retracted from the outside of the endless belt 30 to loosen the tension of the endless belt 30, and then the driven rollers 24, 25, 27 are moved to the frames 21, 22. In addition, the endless belt 30 can be removed between the frames 21 and 22 by moving the driving roller 23 in the axial direction and retracting it from the endless belt 30. For this reason, the endless belt 30 can be easily attached and detached without using a tool.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit and technical idea thereof.

  That is, in the above embodiment, the position, size, length, shape, material, orientation, and the like of each component can be changed as appropriate.

  Or although the said embodiment demonstrated the case where the conveyance apparatus of this invention was applied to the 1st conveyance apparatus 13 arrange | positioned in front of the top seal apparatus 15 as an example, the conveyance apparatus of this invention is a top seal. It may be arranged after the device 15 and can be applied to the second transport device 16. That is, the transfer device of the present invention can be applied to both the first transfer device 13 and the second transfer device 16.

  Or in the said embodiment, although the case of the 1st conveying apparatus 13 of the pillow packaging machine 1 was demonstrated to the example, the conveying apparatus of this invention is not limited to this, For example, the conveying apparatus of the goods XA1 before packaging, or packaging It is possible to apply to a transport device for transporting the subsequent package ZA1 to the downstream process.

  Alternatively, in the above-described embodiment, the case of the box motion type top seal device 15 has been described as an example. However, the top seal device of the present invention is not limited to this, and is a rotary type that circularly moves the upper and lower top sealers 15a and 15b. Or a top seal device that reciprocally moves the upper and lower top sealers 15a, 15b.

  Or in the said embodiment, although the case where tension | tensile_strength was given to the said endless belt 30 by the tension roller 31 which contacts the outer peripheral surface of the endless belt 30, the tension roller of this invention is not limited to this, Instead of the tension roller 31 or together with the tension roller 31, the driven roller 27 that contacts the inner peripheral surface of the endless belt 30 may be configured as a tension roller. In this case, the mechanism for bringing the driven roller 27 into contact with and retracting from the inner peripheral surface of the endless belt 30 may be the same as that of the tension roller 31.

1 Pillow packaging machine 13 First transport device (transport device)
15 Top seal device 19 Side plate (frame)
20 base (frame)
21 Upstream frame (frame)
22 Downstream frame (frame)
23 Driving roller 24, 25, 27 Drive roller 30 Endless belt 30a Conveying surface 31 Tension roller 40 Spline shaft 41 Internal gear XA1 Article YA1 Packaging material (film)

Claims (3)

An endless belt serving as a conveying surface of the article;
A driving roller that contacts the inner peripheral surface of the endless belt and causes the endless belt to travel by rotating with power from a power source;
A driven roller that contacts the inner peripheral surface of the endless belt and rotates as the endless belt travels;
A tension roller provided so as to be capable of contacting and retracting the endless belt, and capable of applying and releasing tension to the endless belt,
The drive roller is movably spanned between the left and right frames, and the driven roller is detachably spanned between the frames.
Conveying device. An internal gear fixed to the drive roller so as to be coaxial with the drive roller;
A spline shaft that is rotated by power from the power source and has irregularities that mesh with the internal gear,
The transport apparatus according to claim 1. A top seal device that seals and cuts in the width direction by sandwiching a film formed in a cylindrical shape while wrapping a packaged body between a pair of top sealers,
Two transport devices that are arranged before and after the top seal device and transport the packaged body as the article,
At least one of the two transport devices is the transport device according to claim 1 or 2,
Packaging machine.

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