JPH06321221A - Unpacking device of bag - Google Patents

Abstract

PURPOSE:To provide an unpacking device which can securely open a bag regardless of the feed accuracy without breaking the bag. CONSTITUTION:This unpacking device is constituted of a feeder 2 feeding packing bags to the unpacking position, a first holder 1A having a plurality of clipping components and locating at one side of opening of supplied bags, a second holder 2A having a plurality of clipping components and locating at the other side of the opening of bags oppositely to the first holder 1A so as to be freely movable back and forth, an adjustable mechanism to adjust the retreating position of respective clipping components of the second holder 2A, and a controller 9 regulating the motion of the second holder 2a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in a packaging device for packaging a top (a sliver is wound into a ball shape) in a spinning factory or the like, and an opening for opening a packaging bag. Regarding the device.

[0002]

2. Description of the Related Art As an apparatus for opening a packaging bag, the applicant has already proposed the apparatus according to Japanese Patent Application No. 4-079002. This device comprises two first chucks and two second chucks facing each other, and the first chuck and the second chuck open and close in parallel with a bag to be supplied. Two pairs of chuck claws are provided respectively.

Thus, according to this apparatus, after the bag is first supplied to the opening position, the second chuck is lowered to sandwich the bag at the opening position from above and below by the first chuck and the second chuck. . After that, either the first chuck or the second chuck is closed. As a result, the bag is clamped by the inner surface of the closed claw. That is, since the friction body is provided on the surface of the claw which comes into contact with the bag, the coefficient of friction between the friction body and the bag is larger than that between the bags, and by closing the claw, the bag follows the movement of the claw. Along with this movement, the bag bends between two pairs of claws and sticks out,
Finally, it is gripped by the inner surface of the nail.

Then, by closing the other claw, the bag is similarly clamped by the inner surface of the claw, and the second chuck is lifted to open the bag.

[0005]

There is usually no problem even if the opening is performed by the above method, but when the accuracy of winding the bag supplied by the roll is poor, or when a plurality of bags are stacked and supplied. If the set position of the bag is displaced, the first
The positional relationship between the first chuck and the second chuck deviates from the predetermined positional relationship, that is, the centers of the first chuck and the second chuck deviate from the center of the bag in the width direction, which causes a problem.

Specifically, the first chuck and the second chuck always hold the opening of the bag at the same position,
Since the chuck of is raised to the same height, slack can be made on one side of the opening of the bag, and the other side becomes tensioned,
If the mouse for guiding the product insertion is inserted in this state, the mouse comes into contact with the slack part on the side surface of the bag opening, causing damage to the bag, or if the tension on the other side is strong, the bag will be damaged during opening. Is a problem that occurs.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a device capable of surely opening a bag without damaging it regardless of the feeding accuracy of the bag.

[0008]

DISCLOSURE OF THE INVENTION The present invention for solving the above-mentioned problems includes a supply device for supplying a packaging bag to an opening position, and one of the opening parts of a supplied bag having a plurality of grips. A first gripping means provided on one side, and a second gripping means having a plurality of gripping parts and provided on the other side of the opening of the bag so as to oppose the first gripping means and to move back and forth. The gist of the invention is that it comprises an adjusting mechanism that adjusts the retracted position of each of the gripping portions of the second gripping means, and a control device that controls the operation of the supply device, the first gripping means, and the second gripping means. .

[0009]

According to the present invention, first, the control device supplies the packaging bag to the opening position by the supply device. Then, after each second gripping means is advanced to sandwich the bag at the open position by the second gripping means and the first gripping means, the bag is gripped by the gripping portion of each gripping means. After that, the bag is opened by retracting the second gripping means.

When the bag is supplied to the opening position with the centers of the first gripping means and the second gripping means deviated from the center of the bag in the width direction, each of the above-mentioned gripping means loads the bag. When the bag is retreated to a predetermined position after gripping, due to the displacement of the bag during supply, slack is generated on one side surface of the opening of the bag and tension is generated on the other side surface of the opening. ,
By adjusting the retracting position of the gripping portion of the second gripping means for gripping the strained side of the opened bag by the position adjusting mechanism, that is, by moving the gripping portion to the side of the first gripping means by an unbalanced amount, The part can be in a moderate tension.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front view showing an embodiment of the device of the present invention, which is a winding top packaging device used in the manufacturing process of wool fiber products.

Needless to say, this example is one embodiment of the device of the present invention, and the present invention can be used as a bag opening device in all fields for storing and packaging products in a bag-shaped product. For example, it may be used for a bag opening of a packaging machine for fruits and the like.

This top packaging device (1) according to the embodiment
Is a cylindrical roll sheet (1
1) is used as a packaging material, which is cut to an appropriate length and the cut portion is sealed to form a bag. As shown in FIG. 1, the present apparatus includes a base (69), a sheet feeding device (2), an opening device (3), and a pushing device (5).
A sealing device (7), a discharging device (55), and a control device (9) for controlling the operation of these devices. Hereinafter, each part will be described in detail.

The base (69) has a structure as shown in FIG. 1 and has an appropriate mounting surface (68) as described above. The sheet feeding device (2), the opening device (3), the sheet cutting device (4), the pushing device (5), the sealing device (7), the discharging device (55), and the control device (9) are respectively described above. It is provided on the base (69).

As shown in FIGS. 1, 2 and 12, the opening device (3) has a machine frame (1) fixedly mounted on a base (69).
5) and the air cylinder (6) arranged in this machine frame (15)
0), a frame (17) provided at the tip of the piston rod (18) of the air cylinder (60), a guide portion (61) for guiding the frame (17), and a bottom surface of the frame (17). Bag opening height adjustment mechanism (90)
And second chucks (2A), (2A) provided at both ends of the lower surface of the bag opening height adjusting mechanism (90), and the base (6).
9) The first chucks (1A) and (1A) provided on the upper surface.

The guide portion (61) is provided with two guide bars (62), (62) arranged in parallel with each other with the air cylinder (60) interposed therebetween, and a bearing (6) for supporting the guide bars.
3) and (63), and guide bars (62) and (6)
The frame (17) is joined to the tip of 2), and the bearings (63) and (63) are fixed to the machine frame (15). Then, the frame (17), the bag opening height adjusting mechanism (90), and the second chuck (2) by the air cylinder (60).
A) and (2A) are moved in the direction of arrow AA '.

The bag opening height adjusting mechanism (90) is provided on the lower surface of the frame (17) and a balance frame (92) facing the frame (17).
A bearing portion (91) for rotatably supporting the balance frame (92) in the direction of the arrow I-I ', and this bearing portion (91).
And a pair of fixed cylinders (85) and (85) provided on the lower surface of the frame (17) sandwiching the
The second chucks (2A) and (2A) are provided on both ends of the lower surface of the balance frame (92), respectively.

The first chucks (1A), (1A) and the second chucks (2A), (2A) are provided so as to face each other, and are arranged in parallel as shown in FIG. Each has a pair of claws (71), (71). Nails (71)
Is an L-shaped member, and its opposing surface (7
2), (72) and the inwardly facing surfaces (73), (73) are provided with friction bodies (74). In addition to the elastic body such as rubber, a material having a large friction coefficient is suitable for the friction body (74).
In addition, the first chucks (1A), (1A), the facing surfaces (72), (72) of the first chucks (1A) are positioned below the mounting surface (68), and 1A) is provided.

As shown in FIGS. 1 and 8, the sheet feeding device (2) is disposed on the side of the base (69),
A holding arm (4) for holding the roll-shaped sheet (11)
5), a feed roller portion (8) for feeding the sheet (11), a clamper (70) for gripping the leading end portion of the sheet (11), and a rear side of the placing surface (68) in the sheet feeding direction. A sheet cutting device (4) which is provided at an end portion and holds the sheet (11) and cuts the sheet (11), and a moving mechanism (47) for moving the clamper (70) in the direction of arrow BB ′. Consists of. The feed roller unit (8) includes a pair of two rollers (8A) and (8B) arranged vertically, one of the pair of rollers being a driving roller (8B) and the other being a driven roller (8).
A), and a clutch mechanism (not shown) and a driving first sprocket (8D) are provided on the shaft of the driving roller (8B).

The moving mechanism (47) is a drive motor (4
1) and a second provided on the left end of the mounting surface (68) in the figure.
The sprocket (42), the second sprocket (42), the first sprocket (8D), and the chain (43) hung on the drive motor (41). The clamper (70) is provided on the chain (43).

The sheet cutting device (4) is shown in FIG.
As shown in FIG. 5, the lower gripping piece (46) provided on the above-mentioned placing surface (68) on the left side of the feed roller portion (8), the air cylinder (54) provided above the lower gripping piece (46), and the air cylinder (54) fixed thereto. Plate (80), an air cylinder (54) that supports the plate (80) so as to be vertically movable, a support frame (48) that supports the air cylinder (54), and a lower surface of the plate (80). The upper gripping piece (49) provided facing the lower gripping piece (46) and the heat sealers (53), (53) provided by the heating wire on the left side of the upper gripping piece (49).

The pushing device (5) is shown in FIGS.
As shown in FIG. 2, a mouse (2) which is provided on the base (69) so as to face the opening device (3) and moves in the direction of the arrow CC ′ is shown.
2) and a push-out portion (62) provided behind the mouse (22).
2) is a tapered rectangular tube. The push-out part (62) is a rodless type air cylinder (58) provided on the base (69), and a moving table (27) fixed to a movable flange part (not shown) of the air cylinder (58). )When,
The telescope type air cylinder (28) is provided on the moving table (27), and the pushing flange (63) is provided at the tip of the piston rod (29) of the air cylinder (28). .

As shown in FIGS. 1, 5 and 8, the sealing device (7) comprises a bag closing part (64) and a sealing part (65), and the bag closing part (64) is a hook (). 26), (2
6) and cylinders (25) and (25) for moving the same in the direction of arrow D-D '. Then, the hooks (26), (26) engage with the left and right side edge portions of the seat (11) at the vertical center position of the opened seat (11) and pull these both side edges outward. Due to
The mouth of the seat (11) is adapted to be closed up and down.
Further, as shown in FIG. 6, the seal portion (65) includes a pair of upper and lower heat plates (5
A heat sealer in which an arm having 1) and (51) is rotatably attached. The opening of the seat (11) closed by the left and right hooking tools (26) and (26) of the bag closing part (64) is clamped from above and below and heated to seal the opening of the seat (11). It is supposed to do.

The discharge device (55) is provided with a slide shaft (5) provided on the machine frame (15) as shown in FIGS.
6), a discharge plate (57) which is engaged with the slide shaft (56) via a bearing (66), and the bearing (66) and the discharge plate (57) are moved in the direction of arrow D-D '. It is composed of a cylinder (not shown) that allows the discharge plate (57) to be indicated by the arrow D.
The top after packaging is discharged to the outside of the base (69) by moving it in the −D ′ direction.

The above-mentioned devices are operated by being controlled by the control device (9), and the top is automatically wrapped in a sheet. The operation will be described below.

When the top packaging device (1) is used, the cylindrical roll sheet (11) is set on the sheet feeding device (2) while the winding device (not shown) is activated to wind the sliver. Take and manufacture balls. The tip of the sheet (11) is attached to the lower gripping piece (4) of the cutter (52).
6) and the upper gripping piece (49).

First, the drive motor (41) shown in FIG. 8 is driven to move the pair of clampers (70) in the direction of arrow B to the side of the lower gripping piece (46) and the upper gripping piece (49). . Then, the tip of the roll-shaped sheet (11) is gripped by the clamper (70). Then, drive roller (8
After connecting a clutch mechanism (not shown) provided on the shaft of B), the air cylinder (54) of the cutter part (52) is driven to move the plate (80) and the like upward and the drive motor (41). Is rotated in the direction of arrow E. As a result, the drive roller (8B) and the driven roller (8A) feed out the sheet (11) in the arrow B'direction, while the clamper (70) moves the tip of the sheet (11) in the arrow B'direction to the opening position. To move. Then, the drive motor (41) is stopped.

Then, the fixed cylinder (8
5), the piston rods of (85) are extended, the balance frame (92) is fixed in a horizontal state, and then the air cylinder (60) of the opening device (3) is extended, whereby the seat (see FIG. 9) is expanded. The opening of (11) is made into the first chuck (1A), (1A) and the second chuck (2A),
Elastic body (74) having the viscosity on the side surface of each nail of (2A)
After the sheet is sandwiched by, the sheet clamper (70) of the sheet feeding device (2) releases the grip of the sheet (11). Then, after disconnecting the clutch mechanism (not shown), the drive motor (41) is rotated in the direction of arrow E ′ to return the clamper (70) to the original position, and then the drive motor (41 41) Stop the rotation.

Then, the air cylinder (54) of the sheet cutting device (4) shown in FIG. 8 is driven to drive the plate (8).
0) and the like are lowered to cut the roll-shaped sheet (11) by the cutter (52), and at the same time, the hot plate (53),
The rear end of the roll sheet (11) is clamped and heated by (53) to be welded to form the sheet (11) into a bag shape.

Then, as shown in FIG. 10, the second chuck (2A) is closed. At this time, the second chuck (2
A) and the friction coefficient between the elastic body (74) provided on the claws of the first chuck (1A) and the sheet (11) are larger than those between the upper portion and the lower portion of the sheet (11). Since it is large, the upper portion of the sheet (11) moves as the claw (71) of the second chuck (2A) moves, and the claw (7) moves.
A curved shape is squeezed between 1) and (71), and finally the nail (7
1) and (71) are sandwiched on the inward side (73) and (73) side. Then, in the same manner, the first chuck (1A) is closed and the claws (71), (71), the inward side (73), (7).
The lower part of the seat (11) is clamped by the 3) side (Fig. 1).
1).

The fixed cylinders (85), (8
5) is contracted, the fixing of the balance frame (92) is released, and the balance frame (92) is made rotatable in the direction of the arrow I-I ', then the air cylinder (60) is contracted, and the second chuck (2A) is lifted to open the sheet (11).

At this time, when the sheet (11) is supplied with a deviation from a predetermined position, it is supplied as shown in FIG. 12, and as shown in the drawing, the first chuck (1A) and the second chuck (1A)
Of the moment acting on the balance frame (92) when the length of the left side (1L) of the opening (1L) of the seat (11) gripped by the chuck (2A) is short and the length of the right side (1R) is long. After that, this rotates and the left side (1L) and the right side (1R) are in the same tension state. Therefore, the sheet (1
1) The conventional problem that the mouse (22) comes into contact with the slack of the opening and the sheet (11) is damaged or the sheet (11) is damaged by the tension exceeding the limit does not occur.

Then, the left and right hooking tools (26), (26) of the bag closing device (25) are moved from the left and right ends of the packaging device (1) toward the center side, whereby both side parts of the opening of the sheet (11). After making it grip, is slightly retracted. As a result, the opening of the seat (11) is slightly expanded in the left-right direction as shown in FIG.

Then, as shown in FIG. 4, the mouse (2
2) is moved in the direction of arrow C to open the sheet (1
Fit this into 1). At the same time, the top (30) wound by the winding device (32) shown in FIG. 3 is conveyed to the back surface of the mouse (22). Then, the air cylinder (58) of the pushing device (5) is driven to move the moving table (2
7) is moved in the arrow C direction and the air cylinder (28) is driven to move the pushing flange (63) in the arrow C direction to move the top (30) to the mouse (2).
Push through sheet (11) into sheet (11).

Then, the air cylinders (28) and (58) are driven to move the movable table (27) and the pushing flange (63) in the direction of the arrow C ', and then the mouse (22) is retracted. Let Then, the second chucks (2A), (2A) and the first chuck (1A),
(1A) is released, and the hooking tool (26),
(26) is further retracted toward the outside. This allows
The opening of the seat (11) is pulled left and right,
As shown in FIG. 5, the upper edge and the lower edge of the opening are linearly overlapped and closed.

Then, the sealing device lifting cylinder (1
2) is driven to lower the sealing device (7) and, as shown in FIG. 6, the hot plates (51) and (51) are closed, so that the opening of the closed sheet (11) is clamped from above and below. Heat and seal this part. Then, the heating plates (51) and (51) are opened, the sealing device elevating cylinder (12) is driven to raise the sealing device (7), and the hooks (26) and (26) are gripped. After the release, the delivery device (55) is operated to deliver the wrapped top to the side, and the packaging operation is completed.

In this example, the bag opening height adjusting mechanism (9
0) is composed of the balance frame (92), the bearing portion (91), and the fixed cylinder (85), but the invention is not limited to this, and the following structure may be adopted. That is, as shown in FIG. 14, a slide shaft (87) having a locking portion (89) at one end is passed through both ends of the frame (17), and a second end is provided at the other end of the slide shaft (87). Chuck (2A)
And the spring (8) between the frame (17) and the locking portion (89) of the slide shaft (87).
8) may be provided and configured.

According to this bag opening height adjusting mechanism (90), as shown in FIG. 14, the first chuck (1A) and the second chuck (1A)
Even if the left side (1L) and the right side (1R) of the opening of the sheet (11) to be gripped by the chuck (2A) are different in length, the spring on the short side (the left side (1L) in the figure) side (88) does not contract and excessive tension does not act on the side. This prevents damage to the sheet (11). Further, since the second chucks (2A) and (2A) always move only in the vertical direction, after opening the sheet (11),
The side surfaces of the left and right openings can always be kept vertical, which contributes to stabilizing the insertion of the mouse for guiding product insertion.

In this top packaging device (1), the rear end of a cylindrical sheet supplied by a roll is heat-welded and cut, and then the front end of the sheet is opened, and the sheet is wound by a winding device (32). The top supply device (35) conveys the top to the position of the pushing device (5), pushes it into the bag, seals the opening of the bag, and sends it out. The labor of the person is almost unnecessary.

[0040]

As described in detail above, according to the present invention, since it is configured as described above, the packaging material can be securely grasped and opened without damaging the packaging material. The operating rate of the device can be improved.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a side view showing an embodiment of the present invention.

FIG. 3 is a front view showing a top supply device.

FIG. 4 is an explanatory view showing a mode of inserting a top into a sheet.

FIG. 5 is an explanatory diagram for explaining closing of a seat.

FIG. 6 is an explanatory diagram for explaining closing of a seal bag of a sheet.

FIG. 7 is a perspective view showing a roll sheet.

FIG. 8 is an explanatory diagram showing a sheet feeding device.

FIG. 9 is an explanatory diagram for explaining a sheet opening operation of the chuck.

FIG. 10 is an explanatory diagram for explaining a sheet opening operation of the chuck.

FIG. 11 is an explanatory diagram for explaining a sheet opening operation of the chuck.

FIG. 12 is an explanatory diagram showing an open state of a sheet.

FIG. 13 is an explanatory diagram showing a state in which the mouse is inserted into the opening of the sheet.

FIG. 14 is an explanatory diagram for explaining another embodiment.

[Explanation of symbols]

 1 Top packaging device 1A 1st chuck 2A 2nd chuck 2 Sheet feeding device 3 Sheet opening device 4 Sheet cutting device 5 Pushing device 7 Sealing device 9 Control device 11 Roll sheet 30 Top 69 Base 85 Fixed cylinder 88 Spring 90 Bag Aperture height adjustment mechanism

Claims (1)

[Claims] 1. A supply device for supplying a packaging bag to an opening position, a first gripping means having a plurality of grips and provided on one side of an opening of the supplied bag, and a plurality of grips. A second gripping means having a second gripping means which is provided on the other side of the opening of the bag so as to oppose the first gripping means and is capable of advancing and retreating, and the retracted position of each gripping part of the second gripping means is adjusted. And a control device for controlling the operation of the supply device, the first gripping means, and the second gripping means.