JPH0227205B2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention [Industrial Field of Application] The present invention is directed to, for example, cutting a cylindrical film into a predetermined length and sealing the cut portion to form a bag shape, and then manufacturing the packaging bag. In bagging and packaging machines for fruits and vegetables, which expand the mouth part, put the contents in there, tie the mouth part, and discharge the bag, a cylindrical film that has been formed into a cylindrical shape in advance is opened into a bag shape. This invention relates to a structure for adjusting the gripping width of a cylindrical bag when the cylindrical bag is transferred from an opening device to a seal cut device by gripping both ends of the cylindrical bag with clamp members.

[Problems to be solved by conventional technology and invention]

Conventionally, various devices of this type have been proposed in which both ends of a cylindrical bag are gripped by clamp members and transferred to a seal cut device. It is desirable to be able to adjust the

SUMMARY OF THE INVENTION An object of the present invention is to provide a structure for adjusting the gripping width of a cylindrical bag in a bag filling and packaging machine, which can grip and transport a cylindrical film at an optimal position even when the width of the cylindrical film is changed.

Structure of the Invention [Means for Solving the Problems] In order to achieve the above object, the present invention moves a cylindrical film F, which has been formed into a cylindrical shape in advance, toward an expander 1 that opens it into a bag shape. For the clamp member 3,
Both ends f1, f2 of a cylindrical bag f opened in a bag shape
The gripping section that grips and transfers the
At least one pair of gripping portions are provided corresponding to the edges f1 and f2, respectively, and the gripping portions are attached to the edges f1. A pair of fixed clamping plates 9 attached corresponding to f2, and a pair of shafts 10 supported on the fixed clamping plates 9 so as to be movable in the width direction of the cylindrical bag f, which is substantially orthogonal to the moving direction of the clamp member 3. The movable clamping plate 11 has a clamping part that clamps the opening edges f1 and f2 of the cylindrical bag f between the movable clamping plate 11 and the clamping surface 9a on the inside of the fixed clamping plate 9. A movable arm 13 is provided which is biased by a biasing member 16 on the outside of the fixed clamping plate 9 so as to always close this clamping part, and the opening end of the cylindrical bag f On the outside of the clamp member 3 that moves toward the expander 1 at a position close to the edges f1 and f2, cam members 19 and 20, which each movable arm 13 abuts, are connected to the cam members 19 and 20 and the moving clamp member. The movable arms 13 in contact with the cam members 19, 20 are guided to the exits 19b, 20b of the cam members 19, 20. The guide portions 31 and 32 are provided, and the cam member 1
The outlets 19b and 20b of the movable clamping plate 11 can be adjusted in the same direction as the moving direction of the movable clamping plate 11.

[Effect]

In the present invention configured as described above, as the clamp member 3 moves, the movable arm 13 of the movable clamping plate 11 comes into contact with the cam members 19 and 20, and the movable arm 13 is also affected by the biasing force of the biasing member 16. The movable arm 13 is rotated in the direction of opening the gripping portion against the
is guided by the guide parts 31 and 32 and the cam member 1
When the bags 9 and 20 are separated from the outlets 19b and 20b, the biasing force of the biasing member 16 grips both ends f1 and f2 of the cylindrical bag f. In this case, when the outlets 19b, 20b of the cam members 19, 20 are adjusted to move in the moving direction of the movable clamping plate 11, the movable arm 13 is moved by the guide parts 31, 32 to the outlets 19b, 20b.
0b, so the opening edge f1, f of the cylindrical bag f
The grip width of 2 is changed.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the cylindrical bag gripping width adjusting structure according to the present invention is applied to a bagging and packaging machine for fruits and vegetables will be described below with reference to the drawings.

First, to explain the overall outline of the bagging and packaging machine, the bagging and packaging machine includes a plurality of clamp members 3.
An endless main chain 4 is provided so as to span in the vertical direction and are attached at equal intervals. In order to synchronize the movement of the clamp member 3 along the transfer path of the main chain 4, a cylindrical bag gripping width adjusting structure according to the present invention is provided, and the enlarged cylindrical bag is A cylindrical bag pull-out device that pulls out the opening edges f1 and f2 of the cylindrical bag f, a cut length adjustment device for the pulled-out cylindrical bag f, and a bag opening that opens and closes the contents input port of the cylindrical bag f. An opening/closing device and a closing grip release device for sealing the opening of the packaging bag and removing it from the transfer path are provided.

Next, the gripping width adjustment structure of the cylindrical bag according to the present invention will be explained. As shown in FIGS. 1 and 2, the expander 1 is always held in an upright state,
The supporting leg plate 2 supported inside is inserted into the opening of the cylindrical film F that is fed out in a band shape in a closed state from the roll-shaped film body RF, and the opening of the cylindrical film F is shaped into an elongated rectangle. It is opened in a half-open shape to form a cylindrical bag f. Both end edges f1 and f2 of this cylindrical bag f are designed to slightly protrude outward from the upper end of the supporting leg plate 2.

In the clamp member 3 that moves toward the expander 1 in which the cylindrical film F is set and held in this manner, a fixed arm 5 is attached to the inside of the pair of left and right main chains 4, and both fixed arms As shown in FIG. 5, a rotating arm 6, which is rotatably attached to a shaft 7 at the upper end of the rotating arm 6, is always closed against the fixed arm 5 as shown in FIG. 2 by the bias of a spring 8. There is.

A fixed clamping plate 9 is provided between both the fixed arms 5 and between both the rotating arms 6 at both end edges f1 and f2 of the cylindrical bag f.
A pair of support shafts 10 are installed on each support shaft 10 and supported on the upper surface of both fixed clamping plates 9.
A movable clamping plate 11 formed in a bifurcated shape is supported so as to be rotatable and movable in the axial direction. Each movable clamping plate 11 extends downward from the inside of this support shaft 10.
The clamping arm 12 is adapted to come into contact with a clamping surface 9a serving as a clamping portion on the inside of the fixed clamping plate 9.
A cam roller 14 is supported by a slide shaft 15 on a movable arm 13 of each movable clamp plate 11 extending from the support shaft 10 to the outside of the fixed clamp plate 9.
When one movable arm 13 moves along the support shaft 10, the cam roller 14 also moves along the slide shaft 15 together with the movable arm 13. Both ends of this slide shaft 15 are biased in the direction of arrow A by a spring 16 as a biasing member, and a clamping arm 12 as a clamping portion of the movable clamping plate 11
and the clamping surface 9a of the fixed clamping plate 9 are always closed. The fixed clamping plate 9 and the movable clamping plate 11 constitute a gripping section.

Note that the shaft 7, which is the center of rotation of the rotary arm 6,
A guide roller 17 is attached to the outer end of the guide rod 18 when the clamp member 3 moves downward.
It is designed to roll on top.

A clamp member 3 that moves toward the expander 1 at a position close to the mouth edges f1 and f2 of the cylindrical bag f.
The upper ends of cam plates 19 and 20, which are substantially inverted isosceles triangular cam members arranged in pairs corresponding to each movable clamping plate 11, are rotatable relative to the fixed frame 21 on the outside. A fixing block 23 is fixed to the outer side of the lower end of the shaft 22.

On the outside of this fixed block 23 is the cylindrical bag f.
A pair of rotating shafts 24, 25 extending in the width direction along mouth edges f1, f2 are interlocked with each other by a chain 26, and a pair of male threads 27, 28 are formed in these rotating shafts 24, 25. Move to block 29
are screwed together. A fixed block 23 of the cam plates 19 and 20 is rotatably connected to the moving block 29 via a connecting pin 30. Note that both the male screws 27 and 28 have opposite screw threads. Then, one rotation shaft 2 on the drive side
When the operating handle 24a at the outer end of the rotating shaft 24 is rotated, both moving blocks 29 of the respective rotating shafts 24 and 25 move toward and away from each other along the male screws 27 and 28. Due to this approach and separation, the adjacent cam plates 19, 19 and 20, 20 are connected to the shaft 22.
Rotate within a certain angle range around .

The cam plates 19 and 2 are arranged opposite to each other.
The distance L between the inner surfaces of the expander 1 becomes narrower as it approaches the expander 1. Further, the distance M between the left and right side edges of each cam plate 19, 20 becomes narrower as it approaches the expander 1, and the guide portions 31,
32 are provided in a protruding manner, and the upper edges of the cam plates 19, 20 serve as inlets 19a, 20a, and the lower edges thereof serve as outlets 19b, 20b. When the clamp member 3 moves toward the expander 1, the cam rollers 14 of the movable arm 13 of each movable clamping plate 11 move toward the inlets 19a, 20a of the cam plates 19, 20 as shown by imaginary lines in FIG. The movable arm 13 is rotated in the direction of arrow A against the bias of the spring 16, and each movable clamping plate 11
The clamping arm 12 and the clamping surface 9a of the fixed clamping plate 9 are opened. Thereafter, when the cam roller 14 of the movable arm 13 passes through the outlets 19b, 20b of the cam plates 19, 20 and leaves the inner surface thereof, the movable arm 13 moves away from the spring 16.
The clamping arm 12 of the movable clamping plate 11 and the clamping surface 9a of the fixed clamping plate 9 close again as shown by the solid line in FIG. Both edges f1 and f2 of the bag f are gripped. Note that these cam plates 19 and 20 constitute operating means for the gripping portion.

On the other hand, when changing the gripping width of the mouth end edges f1 and f2, the operation handle 24a of the drive-side rotation shaft 24 is rotated, and the adjacent cam plates 19, 19 and 20 are rotated as described above. 20 are moved toward each other and away from each other. The distance between them is determined by a pointer 33 fixed to the moving block 29 and a fixed scale plate 34.
For example, as shown in FIG. 4, when the distance between them is widened, the cam roller 14 of the movable arm 13 comes into contact with the guide portions 31 and 32 of the cam plates 19 and 20, and the movable clamp plate 11 This guide portion 31, while being moved in a direction away from each other along
32 along the outlet 19b of the guide plates 19, 20,
You will be guided towards 20b. Therefore, the interval between the two movable clamping plates 11 is also widened, and the opening edge f1 of the cylindrical bag f,
The f2 grip width is changed. The same applies to the case where the width of the grip is narrowed. That is, by rotating the operating handle 24a, the gripping width of the mouth edges f1 and f2 of the cylindrical bag f can be freely changed within a certain range.

In addition, to briefly explain the transfer of the cylindrical bag f to the seal cutting device after the clamp member 3 grips the opening edges f1 and f2 of the cylindrical bag f set and held in the expander 1, the clamp member 3 grips the mouth edges f1 and f2 of the cylindrical bag f, and at the same time the clamp member 3 and the expander 1 are integrally connected as shown by the imaginary line in FIG. 2, and are hung from the vertical direction to the horizontal direction. As the clamp member 3 moves from the upright state to the horizontal state along the main chain 4, the expander 1 also moves from the upright state to the horizontal state together with the clamp member 3. Further, as the clamp member 3 moves, the mouth edges f1 and f2 of the cylindrical bag f are pulled out from the expander 1, and the clamp member 3 and the expander 1 are separated, and the pulled out cylindrical bag F is placed in a predetermined position. The cylindrical bag f is cut to length and sealed at the cut portion, so that the cylindrical bag f becomes a single packaging bag. Also, at approximately the same time as this seal cut, the cylindrical bag f is set and held in the expander 1 in the same manner as in the case described above, and the expander 1 is returned to the upright state again. Then, the next clamp member 3 is moved toward the expander 1,
Continuous operation is performed.

In addition, when the contents are put into a single packaging bag after seal-cutting the cylindrical bag f, as shown in Fig. 5,
The rotating arm 6 of the clamp member 3 is forcibly opened with respect to the fixed arm 5 against the bias of the spring 8, and the packaging bag is opened. Since the gripping widths of f1 and f2 can be changed, the opening width of the packaging bag can be adjusted simply by adjusting the rotation angle of the rotation arm 6 and changing the opening width, as shown in Fig. 6 a and b. You can also change the shape freely.

The present invention is not limited to the embodiment described above, and the following configuration is also possible.

(a) In the embodiment described above, the male screws 27, 28
Simply slide the moving block 29 and fix it with a set screw.

(b) In the embodiment described above, the cam plates 19, 20
The rotation center shaft 22 of the cam plates 19 and 20 is eliminated, and the upper ends of the cam plates 19 and 20 can slide using the fixed frame 21 as a guide rail. In that case, the fixed block 23 and the moving block 29 are made integral. Even in the case of this configuration, the male screws 27 and 28 of the rotating shafts 24 and 25 may be omitted, and the rotating shafts 24 and 25 may be simply slid and fixed with set screws.

(C) In the embodiment described above, the opening edge f1 of the cylindrical bag f,
Although one pair of movable clamping plates 11 are arranged corresponding to f2, three or more of each are arranged.

Effects of the Invention As detailed above, the present invention provides an expander 1 for opening a cylindrical film F formed into a cylindrical shape in advance into a bag shape.
With respect to the clamp member 3 moving toward
a pair of fixed clamping plates 9, which are provided in at least one pair corresponding to 2, and have the same gripping portions attached corresponding to the ends f1 and f2, and movement of the clamp member 3 with respect to the fixed clamping plates 9; A cylindrical bag f approximately perpendicular to the direction
The movable clamping plates 11 each have a pair of movable clamping plates 11 supported on a shaft 10 so as to be movable in the width direction of the cylindrical bag f. A clamping arm 12 forming a clamping part that clamps the mouth edges f1 and f2, and a biasing member 16 on the outside of the fixed clamping plate 9 to keep this clamping part closed at all times.
movable arms 13 which are biased by cam member 19 that 13 abuts,
20 are provided in pairs such that the distance between the cam members 19, 20 and the moving clamp member 3 becomes narrower as the distance approaches the expander 1, and the cam members 1
9 and 20, the movable arm 13 in contact with the same cam member 1
Guide portions 31 and 32 are provided to guide the cam members 19 and 20 to the exits 19b and 20b of the cam members 19 and 20, respectively.
Since the exits 19b and 20b of 0 can be adjusted to move in the same direction as the moving direction of the movable clamping plate 11, if the outlet of the cam member is moved in the same direction as the moving direction of the movable clamping plate, the movable clamping plate can be adjusted. It can be moved indirectly without directly moving along the support shaft. Therefore, even if the position of the movable clamping plate changes during continuous operation, simply by determining the exit position of the cam member, the movable clamping plate is always guided to a constant position by the guide part, and the cylindrical bag is kept at a constant position. Can be held at all times.

[Brief explanation of drawings]

FIG. 1 is a schematic front view showing a grip width adjusting structure according to an embodiment of the present invention, FIG. 2 is a schematic side sectional view, and FIG. 3 is an explanatory view showing the opening and closing operation of the gripping portion of the clamp member. Fig. 4 is an explanatory diagram showing the movement adjustment operation of the movable holding plate of the clamp member, Fig. 5 is an explanatory diagram showing the opening/closing operation of the clamp member when putting the stored items into the packaging bag, and Figs. 6 a and b. FIG. 3 is an explanatory diagram showing the relationship between changing the gripping width and the opening shape of the packaging bag. Expander...1, Support leg plate...2, Clamp member...
...3, Fixed arm...5, Rotating arm...6, Fixed clamping plate...9, Clamping surface as a clamping part...9
a, Support shaft...10, Movable clamping plate...11, Clamping arm as a clamping part...12, Movable arm...13, Cam roller...14, Spring as a biasing member...
...16, Cam plate as a cam member ...19,2
0, Exit...19b, 20b, Rotation axis...24,
25, Operation handle...24a, Male thread...2
7, 28, Guide portion...31, 32, Tubular film...F, Tubular bag...f, Mouth edge...f1, f
2.

Claims (1)

[Scope of Claims] 1. A cylindrical bag f opened into a bag shape is opened against a clamp member 3 moving toward an expander 1 which opens a cylindrical film F formed into a cylindrical shape in advance into a bag shape. At least one pair of gripping parts for gripping and transferring both mouth edges f1, f2 are provided corresponding to each mouth edge f1, f2, and the gripping parts are attached corresponding to said both mouth edges f1, f2. A pair of fixed clamping plates 9 and the fixed clamping plate 9
The movable clamping plates 11 each have a pair of movable clamping plates 11 supported by a shaft 10 so as to be movable in the width direction of the cylindrical bag f, which is substantially perpendicular to the moving direction of the clamp member 3. The opening edges f1, f of the cylindrical bag f are connected to the inner clamping surface 9a of the plate 9.
A clamping arm 12 forming a clamping part for clamping 2, and the fixed clamping plate 9 so as to keep this clamping part closed at all times.
The movable arm 1 is biased by a biasing member 16 on the outside of the
3, and a cam member 19 with which each movable arm 13 abuts is provided on the outside of the clamp member 3 that moves toward the expander 1 at a position close to the mouth edges f1 and f2 of the cylindrical bag f. , 20 are provided in pairs such that the distance between the cam members 19, 20 and the moving clamp member 3 becomes narrower as the distance approaches the expander 1, and the movable arm in contact with the cam members 19, 20 is provided. 13 to the exits 19b, 20b of the cam members 19, 20, and guide the exits 19b, 20b of the cam members 19, 20 in the same direction as the moving direction of the movable clamping plate 11. A structure for adjusting the gripping width of a cylindrical bag in a bag filling and packaging machine, which is characterized by being adjustable in movement.