JPH06135418A - Sheet feeder for wrapping machine - Google Patents

Abstract

PURPOSE:To supply a wrapping sheet without supporting it in a sheet supplied direction. CONSTITUTION:At the same time that a tip A1 of a wrapping sheet is supplied in a sheet supplied direction from a sheet support means 2 located upstream along the sheet supplied direction, a slide face 4 is moved in the sheet supplied direction to be pulled out, whereby the wrapping sheet is bridged over to a sheet support means 3 located downward without slack downward while it is supported on the slide face 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a substantially rectangular parallelepiped shape such as a large number of stacked papers or books, a strip-shaped cloth or fabric folded in a zigzag shape in the longitudinal direction, or a large number of accumulated boxes. A sheet feeding device of a packaging machine that wraps items with packaging sheets, specifically, the packaging sheet supply path is arranged orthogonally to the elevator hoistway, and the unwound packaging sheets are directed to the elevator hoistway one by one. As the elevator is moved up and down, the contents are abutted against the packaging sheet and wound around the body, then transferred horizontally and the protruding end of the packaging sheet protruding from the side of the opening of the contents is placed along the side. Regarding things to fold.

[0002]

2. Description of the Related Art Conventionally, as a sheet feeding device of this type of packaging machine, as disclosed in, for example, Japanese Utility Model Publication No. 59-7203, the sheet feeding device is opposed to both sides of the packaging sheet in a direction orthogonal to the sheet feeding direction. The feed belt and the upper and lower clamping pieces are laid parallel to the sheet feeding direction, and the packaging sheet is horizontally fed with the operation of these feeding belts, and both sides of the packaging sheet are clamped between the upper and lower clamping pieces. At the same time, the elevator is stopped on the hoistway, and then the elevator rises and bumps the upper surface of the contents against the sandwiched packaging sheet, so that the packaging sheet is folded in the direction parallel to the sheet feeding direction to form an inverted U shape. A method in which the rolled contents are horizontally transported in a direction orthogonal to the sheet feeding direction, and the protruding end of the packaging sheet is sequentially folded along the side surface of the contents. A.

[0003]

However, in such a sheet feeding device of the conventional packaging machine, since the upper and lower clamping pieces extending in the sheet feeding direction are wrapped around the both sides of the packaging sheet, The folds of the body wrap become parallel to the sheet feeding direction, and then the contents must be transported in a direction orthogonal to the folds of the body wrapping in order to fold the ears, and the sheet feeding direction and the fold folding direction are orthogonal to each other. As a result, there is a problem that the entire device becomes large in the direction orthogonal to the selvage folding direction.

Further, since the feed belt and the upper and lower sandwiching pieces are respectively provided laterally in the sheet feeding direction so as to face both sides of the packaging sheet, a drive portion for the feed belt is also required in addition to these, and only that much. There is a problem that the structure becomes complicated and the cost becomes high.

In view of such conventional circumstances, it is an object of the present invention to feed a packaging sheet in the sheet feeding direction without supporting it.

[0006]

In order to solve the above-mentioned problems, the technical means of the present invention is to provide sheet support means upstream and downstream of a packaging sheet supply path in the sheet supply direction, and an elevator hoistway. The slide surface is provided in a direction orthogonal to the sheet feeding direction with the sheet sandwiched therebetween, and a sliding surface is provided on both of these sheet supporting means along the lower surface of the packaging sheet feeding path so that the sliding surface can be freely taken in and out in the sheet feeding direction. It is characterized in that the sheet is moved in the sheet feeding direction in conjunction with the sheet feeding.

[0007]

According to the above technical means of the present invention, the front end of the packaging sheet is fed in the sheet feeding direction from the sheet supporting means on the upstream side in the sheet feeding direction, and at the same time, the sliding surface is moved in the sheet feeding direction. By pulling out, the packaging sheet is hung on the sheet supporting means on the downstream side without sagging downward while being supported on the sliding surface.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In this embodiment, as shown in FIGS. 1, 4 and 5, a set of parallel side surfaces B1 and B1 of the contents B, reference guides D1 and D1 facing in the sheet feeding direction, and the remaining side surface B.
Vertical reference planes D2 that are opposed to each other in the left-right direction orthogonal to the sheet feeding direction are arranged in a plane U-shape around the hoistway 5a of the elevator 5 and are surrounded by the two. When the content B is placed at the packaging start position P1, the side surfaces B1, B1, B2 of the content B are positioned by abutting against the reference guides D1, D1 and the reference surface D2, respectively, and, for example, a rectangle of kraft paper or the like. The individual wrapping sheets A are separated one by one from the stacked state by the paper feed mechanism 1 and fed out, and adhesive tapes C1, C2, C2 are provided as fixing means at the center part in the left-right direction and both ends in the left-right direction of the leading end A1.
A part of the sheet is projected and affixed, and the supply path A'of the packaging sheet A is attached.
The feeding roller 2a and the pressing roller 2b arranged as the sheet supporting means 2 on the upstream side of the sheet feeding direction of the sheet feeds the packaging sheet A fed out to the reference guide D1.
The sheet is pushed and transferred horizontally through the lower part of D1 toward the sheet supporting means 3 on the downstream side.

The feed roller 2a and the pressing roller 2b are
The lower feed roller 2a, which is arranged above and below the supply path A'of the packaging sheet A and faces the non-adhesive surfaces of the adhesive tapes C1, C2 and C2, is formed in a cylindrical shape longer than the lateral dimension of the packaging sheet A. And rotatably support the adhesive tapes C1, C2, C2 and the upper pressing roller 2b facing the adhesive surface of the adhesive tapes C1, C2, C2.
A plurality, two in the illustrated example, are arranged at positions that do not interfere with the passing positions of C2 and C2 so as to be movable toward and away from the feed roller 2a, and a drive unit such as a stepping motor is provided on the feed roller 2a and the press roller 2b. In cooperation with
By these driving units, the feed roller 2a is intermittently rotated in the sheet feeding direction, and the pressing roller 2b is moved toward and away from the feed roller 2a.

The driving portions of the feed roller 2a and the pressing roller 2b are operated and controlled by a control portion (not shown) which is the same as the driving portion of the paper feeding mechanism 1, and the paper feeding mechanism 1 attaches the adhesive tapes C1, C2 and C2. In the initial state of feeding the wrapped packaging sheet A to the feeding roller 2a, the pressing roller 2b is fed to the feeding roller 2a while stopping the rotation of the feeding roller 2a.
Of the feeding roller 2a while pressing the pressing roller 2b against the feeding roller 2a at substantially the same time as the operation of the sheet feeding mechanism 1 and starting the rotation of the feeding roller 2a to push out and transfer the packaging sheet A. After A is supplied to the sheet supporting means 3 on the downstream side, which will be described later, the pressing roller 2b is separated from the feeding roller 2a, and the feeding roller 2a
Stop the rotation of and return to the initial state.

As the downstream side sheet supporting means 3, in the case of this embodiment, a supporting guide is horizontally provided horizontally at the same height as the upper end position of the feed roller 2a, and the downstream side of this supporting guide 3 is provided. A roller is provided to bend the side obliquely upward so as to project, and if necessary, to feed the packaging sheet A supplied to the upstream end of the support guide 3 to the downstream side projecting obliquely upward.

A sliding surface 4 is provided between the feed roller 2a and the support guide 3 so as to be freely taken in and out in the sheet feeding direction along the lower surface of the feeding path A'of the packaging sheet A. It is bendable and slippery. For example, it is formed into a sheet shape with a material such as fluororesin, and the width dimension in the sheet feeding direction is longer than the distance from the feed roller 2a to the support guide 3, and the length dimension in the left-right direction is the packaging sheet. The length is approximately the same as the maximum width dimension of A.

Further, the sliding surface 4 is divided into a plurality of parts in the left-right direction and wound around the feed roller 2a so as not to interfere with the pressing roller 2b, and in the case of this embodiment, the upstream end of the sliding surface 4 in the sheet feeding direction. Are respectively fixed to the take-up rods 4a and are elastically taken up by an elastic body such as a spring, and the take-up rods 4a are rotatably provided laterally below the feed roller 2a, and the downstream end is an upstream described later. It is fixed to the body winding guide 6 at the end.

The elevator 5 has the above-mentioned reference guide D1,
It is arranged below D1 so as to be able to reciprocate in the vertical direction, and its width dimension in the sheet feeding direction is formed so that two maximum contents B can be placed in parallel in the sheet feeding direction. Content B with maximum length in the left-right direction
Is formed in such a size that one can be placed in the left-right direction, and a drive unit such as a stepping motor is provided in series and is moved up and down by this drive unit.

The drive section of the elevator 5 is controlled by the control section, and in the initial state in which the sheet feeding mechanism 1 feeds the packaging sheet A to the feed roller 2a, the elevator 5 is lowered to a position close to the lower limit position and stands by. Immediately after the body-wrapping guides 6, 6 described later move to positions directly below the reference guides D1, D1, the elevator 5 is lifted to the upper limit position to bring the upper surface 5a closer to the body-wrapping guides 2, 2 described below.
Place the contents B on the packaging sheet A, and press the sheets 6d, 6
Immediately after d is separated from the upper surfaces 6a, 6a of the body winding guides 6, 6, the upper surface B3 of the content B is lowered to the lower limit position below the body winding guides 6, 6 and the compression receiving plates 7, 7.
Following this, the upper surface B3 of the contents B is slightly raised until it comes into pressure contact with the compression receiving plates 7, 7 once or a plurality of times, and the body winding guide 6 on the downstream side is located above the center of the compression receiving plates 4, 4. After protruding to the position, lower it slightly and return to the initial state.

Further, during the lowering of the contents B by the elevator 5, a pair of body winding guides 6 and 6 for winding the packaging sheet A on the contents B, and an upper surface B3 of the lowered contents B.
The compression receiving plates 7 and 7 that can freely move in and out of the hoistway 5b of the elevator 5 that opposes, and the both side flaps A4 of the projecting ends A3 and A3 of the wrapped packaging sheet A in the left-right direction of the contents B. Horizontal folding guides 8 for folding inward are provided along side faces B2, B2 that open in a trunk, and a pusher 9 that horizontally feeds the contents B in the sheet feeding direction is provided along the upper surface 5a of the lowered elevator 5. The overhanging ends A3, A3 of the packaging sheet A that has moved horizontally
Lower flaps A5, A5 on the side B where the contents B open
Up-folding guides 10 and 10 that are folded up along B2 and B2, respectively
The upper flaps A6 and A6 of the projecting end portions A3 and A3 are provided above the upper folding guides 9 and 9.
The lower folding guides 11 and 11 that are respectively folded along the side surfaces B2 and B2 that open are provided near the packaging end position P2, which is arranged next to the packaging start position P1.

The body winding guides 6, 6 have upper surfaces 6a, 6
a is substantially horizontal and the opposing inner side surfaces 6b, 6b are formed in a plate shape parallel to both side surfaces B1, B1 of the contents B in which the descended contents B are closed, and the length dimension in the left-right direction is the maximum size contents. It is made larger than the length dimension of B, and elastic bodies 6c, 6c such as sponges and leaf springs are fixed to the lower surface, and the upper surface B3 of the contents B is vertically lowered below the reference guides D1 and D1. Are arranged so as to be reciprocally movable in the sheet feeding direction, and driving units such as a stepping motor are connected to each other, and these driving units move up and down and move toward and away from each other.

The drive units of the body-wrapping guides 6, 6 are controlled by the control unit, and in the initial state of feeding the wrapping sheet A to the feed roller 2a by the paper feed mechanism 1, the body-winding guide 6 arranged on the upstream side in the sheet feeding direction is set. Feed roller 2 above
The body-wound guides 6 arranged on the downstream side are made to stand by near the center a or directly below the reference guide D1 at the positions above the center of the compression receiving plates 7 and 7, respectively. Is moved to the vicinity of the support guide 3 and the leading end A1 of the packaging sheet A extruded and transferred by the feed roller 2a and the pressing roller 2b reaches the upstream winding guide 6 and then the upstream winding guide 6 Is moved in the sheet feeding direction at the same speed as the transporting speed of the packaging sheet A, and is brought closer to the body winding guide 6 on the downstream side.

The leading edge A of the transferred packaging sheet A
After transferring 1 from the upper body winding guide 6 to the lower body winding guide 6 and further transferring from the lower body winding guide 6 to the support guide 3, both body winding guides 6, 6.
6 in the direction opposite to the sheet feeding direction to positions directly below the reference guides D1 and D1, respectively, while slightly moving up the respective upper surfaces 6a and 6a as the elevator 5 moves up to the upper limit position,
The inner side surfaces 6b, 6b are arranged on the same vertical plane as the both side surfaces B1, B1 on the upstream side and the downstream side of the content B in the sheet feeding direction,
As the elevator 5 descends, the body-wrapping guides 6 and 6 are slightly moved downward, and the elevators 5 are made to project toward each other by a predetermined amount immediately after the elevator 5 descends to the lower limit position.

Immediately after the elevator 5 slightly moves up and presses the upper surface B3 of the contents B against the compression receiving plates 7, 7, the upstream side winding guide 6 is projected by a predetermined amount, and a little later than this, the downstream side is wound downstream. By projecting a predetermined amount of the body-wrapping guide 6 and performing these protrusions once or a plurality of times, the body-side guide 6 on the upstream side protrudes to a position above the center of the compression receiving plates 7 and 7 and the body-side guide 6 on the downstream side. After the approaching is completed and the approaching is completed, the upstream side body winding guide 6 is returned and moved in the direction opposite to the sheet feeding direction, and at the same time, the downstream side body winding guide 6 is projected to a position above the center of the compression receiving plates 7 and 7 to be in the initial state. Return to.

The upper surfaces 6a, 6 of the body winding guides 6, 6
The reference guide D is provided between a and the reference guides D1 and D1.
1, D1 toward the upper surface 6a, 6a of the body winding guides 6, 6 sheet presser 6d, 6d, which is composed of, for example, a weight,
Facing the lateral center of both side ends A1, A2 of the wrapping sheet A, the wrapping sheet A is movably supported up and down so as not to interfere with the adhesive tape C1 that has been affixed in advance. The drive units 6e, 6e, such as solenoids, which are arranged, are linked to each other, and the drive units 6e, 6e are connected.
Thus, the sheet pressers 6d, 6d are moved up and down to come into contact with and separate from the upper surfaces 6a, 6a of the body-wrapping guides 6, 6.

Drive portions 6e, 6e of the sheet retainers 6d, 6d
Is controlled by the control unit, and in the initial state of feeding the packaging sheet A to the feed roller 2a by the sheet feeding mechanism 1, the sheet pressers 6d and 6d are moved upward to separate from the upper surfaces 6a and 6a of the body-wrapping guides 6 and 6, Immediately after the elevator 5 is raised to the upper limit position, the sheet pressers 6d and 6d are moved downward to be pressed against the upper surfaces 6a and 6a of the body-wrapping guides 6 and 6 and the sheet pressers 6d and 6 are operated by operating a packaging start switch S2 described later.
Immediately after the elevator 5 is moved up and separated from the body-wound guides 6 and 6, and the elevator 5 descends to the lower limit position, the sheet presser 6d,
6d is moved downward and brought into pressure contact with the upper surfaces 6a, 6a of the body-wrapping guides 6, 6, and after the approaching of the body-wrapping guides 6, 6 is completed, the sheet pressers 6d, 6d are moved up to return to the initial state.

The compression receiving plates 7 and 7 are subjected to a non-adhesive treatment, for example, by applying a non-adhesive agent such as silicon paint on the upper surfaces thereof, and the body winding guides 6 and 6 are provided from outside the hoistway 5b of the elevator 5. The contents B are arranged so as to reciprocate in the left-right direction toward the upper surface B3 of the contents B, and a driving unit such as a stepping motor is connected to each of them, and these driving units move the respective units in the left-right direction. .

The drive portions of the compression receiving plates 7 and 7 are controlled by the control portion, and the compression receiving plates 7 and 7 are packaged by the elevator 5 in the initial state of feeding the packaging sheet A to the feed roller 2a by the paper feeding mechanism 1. The upper surface of the contents B is projected outside the hoistway 5b of the elevator 5 which does not hinder the descent of the sheets A and the contents B, and immediately after the elevator 5 is lowered after the packaging is started and the contents B which have descended are projected. Immediately after engaging with the left and right edges of B3, the body-winding guides 6 and 6 approach, and the elevator 5 slightly descends, the contents B are returned to the outside of the hoistway 5b of the elevator 5 to return to the initial state. .

The lateral folding guides 8 are below the above-mentioned body-wrapping guides 6 and 6 and on the same horizontal plane as the side surfaces B2 and B2 where the body-wrapped contents B are open, the projecting ends A3 and A3 of the body-wrapping packaging sheet A. Both side flaps A4 ...
Is arranged so as to be reciprocally movable in the sheet feeding direction, facing each other, and a driving unit such as a stepping motor is connected to each of them, and these driving units move the sheet in the sheet feeding direction.

The drive unit of the horizontal folding guides 8 ... Is controlled by the control unit, and in its initial state, the horizontal folding guides 8 ... Stand by at a position where they do not interfere with the lowering of the packaging sheet A and the contents B by the elevator 5. After the body-wound guides 6 and 6 are approached and the compression receiving plates 7 and 7 are returned from above the contents B to the outside of the hoistway 5b of the elevator 5, they are moved toward each other, and the pushers 9 to be described later are moved forward. Immediately after completing, move them away from each other to return to the initial state.

The pusher 9 is the body winding guide 6, 6 described above.
Is disposed below the side surface B1 of the body-wound content B upstream of the sheet supply direction so as to be reciprocally movable in the sheet supply direction, and the height dimension of the pushing surface 9a is the same as that of the content B having the maximum size. In addition to being formed to be larger than the height dimension, a driving unit such as a stepping motor is provided in series, and these driving units move the content B in the sheet feeding direction.

The drive portion of the pusher 9 is controlled by the control portion, and in its initial state, the pushing surface 9a is made to stand by on the same vertical surface as the side surface B1 of the content B on the upstream side in the sheet feeding direction, and the lateral folding guide Immediately after or after the movement of 7 in the approaching direction, and at the same time as the movement of the body-wrapping guides 6 and 6 in the sheet feeding direction, a length corresponding to the width dimension of the maximum size of the content B is moved to the downstream side at the same time. When the elevator 5 is moved forward, the pushing surface 9a is retracted to the upstream side at the same time as the elevator 5 is raised, and the initial state is restored.

In the case of the present embodiment, the pushers 9 are divided into a plurality of parts in the left-right direction and provided at appropriate intervals, and these are vertically inserted through the passages 5c ... Place it.

The upper folding guides 10, 10 are located on the same horizontal plane as the side surfaces B2, B2 of the body B in which the contents B are opened, and closer to the downstream side than the standby position of the horizontal folding guides 5, 5 on the downstream side in the sheet feeding direction. And the lower flap A5
The folding sides 10a, 10a facing the A5 are formed substantially horizontally and supported movably in the vertical direction, and the contents B are provided between the end of the forward movement of the pusher 9 and the start of the lift of the elevator 1. The side edges B2, B2 which are opened, or the folding sides 10a, 10a are upwardly inclined and immovably fixed, and the folding sides 10a, 10a are fixed.
Lower flaps A5, A5 transferred by the pusher 9 to the
Collide with each other and fold them up along side surfaces B2 and B2 that open.

The lower folding guides 11, 11 are located above the upper folding guides 10, 10 and have projecting end portions A3, A3.
The upper flaps A6, A6 of the overhanging end portions A3, A3 of the packaging sheet A are on the same vertical plane as the opening side faces B2, B2 of the folded contents B of the lower flaps A5, A5.
It is arranged so that it can reciprocate in the left-right direction, facing in the up-down direction.
Side surfaces B2, B2 at which the inner ends 11a, 11a of the contents B are opened when the contents B are raised by the elevator 5.
By projecting toward, the overhanging ends A3, A
The upper flaps A6 and A6 of 3 hit each other and the contents B
Is gradually folded down along the side faces B2, B2 that open, and after the content B has passed between these inner ends 11a, 11a,
It is further projected along the lower surface B4.

Further, at the packaging end position P2, a plurality of latches 12 ... Are movably arranged respectively via elastic bodies such as springs, and the latches 12 ... Then, the contents B are brought into contact with the side surfaces B1 and B1 when the contents B is lifted by the elevator 5, and the lower surfaces B4 of the contents B pass through the latches 12 ...

Further, the control unit is the paper feed mechanism 1 described above.
In addition to the drive unit for the elevator 5, the drive unit for the elevator 5, the drive units for the body-wrapping guides 6, 6, the drive units for the compression receiving plates 7, 7, the drive units for the lateral folding guides 8 ...
By electrically connecting the sheet supply start switch S1 and the packaging start switch S2, which are arranged close to the packaging start position P1 and the packaging end position P2, respectively, and manually operating the sheet supply start switch S1. The drive unit of the paper mechanism 1 is started, and from this state, the packaging start position P1
By loading the content B on the sheet and manually operating the packaging start switch S2, the drive unit of the elevator 5 is started, and at the same time, the drive unit of the sheet feeding mechanism 1 is also operated to start feeding the next packaging sheet A. .

Next, the operation of the sheet feeding device of such a packaging machine will be described.

First, when the sheet supply start switch S1 is manually operated, the sheet feeding mechanism 1 starts to operate and the adhesive tape C
A packaging sheet A, which is a part of C1, C2, and C2 protruding and attached, is fed out toward the feed roller 2a, and at the same time as this, the pressing roller 2b is pressed against the feed roller 2a and the leading end A1 of the wrapped packaging sheet A is fed out. By sandwiching and rotating the feeding roller 2a, the leading edge A1 of the packaging sheet A is horizontally pushed out toward the support guide 3 along the supply path A'of the packaging sheet A, and the sliding surface 4 is transported.
It slips and is not paid out.

When the front end A1 of the extruded and transferred packaging sheet A reaches the upstream body winding guide 6 waiting near the feed roller 2a or immediately below the reference guide D1 as shown in FIG. The upstream winding guide 6 starts to move in the sheet feeding direction at the same speed as the transfer speed of the packaging sheet A, and along with this, the sliding surface 4 fixed to the upstream winding guide 6 is also pulled in the sheet feeding direction. As a result, the sliding surface 4 is unwound from the winding rod 4a, and the supply path A'is at the same speed as the transfer speed of the packaging sheet A.
It is pulled out in the sheet feeding direction along the lower surface of the.

Therefore, the wrapping sheet A is supported on the sliding surface 4 and pushed out without being loosened and transferred. After that, when the upstream body winding guide 6 moves to the vicinity of the downstream body winding guide 6 and stops, As shown in FIGS. 2 and 3, the tip A1 thereof moves from the sliding surface 4 onto the downstream body winding guide 6 and further from the downstream body winding guide 6 onto the support guide 3 and from the feed roller 2a. The tip end A1 is slid over the support guide 3, and the tip A1 is guided obliquely upward along the support guide 3 to feed the roller 2a.
Supply by.

Further, after the leading edge A1 of the packaging sheet A has moved onto the support guide 3, as shown in FIGS. 4 and 5, the body winding guides 6 and 6 move to positions directly below the reference guides D1 and D1, respectively. The sliding surface 4 slips on the lower surface of the transferred packaging sheet A and is wound up by the winding rod 4a, and after the supply of the packaging sheet A is completed, the pressing roller 2b is separated from the feeding roller 2a, and a little later than this. After the body-wrapping guides 6 and 6 slightly moved up as the elevator 5 moved up to the upper limit position, the sheet pressers 6d and 6d moved downward and were supplied between the body-wrapping guides 6 and 6 and the upper surfaces 6a and 6a. By sandwiching the packaging sheet A, the positional deviation of the packaging sheet A is prevented.

After that, when the contents B are positioned and placed on the packaging sheet A, the weight of the contents B causes the packaging sheet A to be placed.
Bends to bring the lower surface B4 of the contents B into contact with the upper surface 5a of the elevator 5, and when the packaging start switch S2 is manually operated in this state, the sheet pressers 6d and 6d move upward to release the sandwiching of the packaging sheet A. After that, the elevator 5 starts to descend, and accordingly, the packaging sheet A is folded along the side surfaces B1 and B1 of the content B into a substantially U shape by the body winding guides 6 and 6.

When the descent of the elevator 5 is stopped, the sheet pressers 6d, 6d move downward to move the side edges A of the packaging sheet A.
1, A2 are sandwiched between the upper surfaces 6a, 6a of the body-wound guides 6, 6 and at the same time as this, the compression receiving plates 7, 7 are
As shown in (a), it projects above the content B and engages with the left and right edges of the upper surface B3 of the content B, and subsequently, it projects by a predetermined amount in the direction in which the body winding guides 6 and 6 approach each other. It faces the upper surface B3 of the contents B.

After that, the elevator 5 slightly moves up as shown in FIG. 6 (b) and vertically compresses the contents B between the compression receiving plates 7 and 7, whereby the contents B of the packaging sheet A are compressed. The portions facing both side surfaces B1 and B1 of each of the slacken in the vertical direction, but immediately after that, the upstream side body winding guide 6 is released.
While protruding as shown in FIG. 6C, the body-wound guide 6 on the downstream side subsequently protrudes as shown in FIG. 6D.

As a result, the front end A1 and the end A2 of the packaging sheet A are wound in a U shape along the elastic bodies 6c, 6c fixed to the upper surfaces 6a, 6a, the inner side surfaces 6b, 6b and the lower surface of the body winding guides 6, 6, respectively. If the slackened portion of the packaging sheet A is pulled upward by these frictional resistances and is tightly fastened to the body, and then the elevator 5 is slightly raised and the body-wound guides 6 and 6 are repeatedly projected, the content B is vertically moved. The packaging sheet A is further tightened and the packaging sheet A is tightened.

Then, after the slack of the packaging sheet A disappears due to the protrusion of the body-wrapping guides 6 and 6, the tension applied to the packaging sheet A causes the tip A1 and the end A2 of the packaging sheet A and the body-wrapping guides 6 and 6. Becomes larger than the frictional resistance of the sheet presser 6d, 6d and the upper surface 6a, 6a of the body winding guides 6, 6 from the front end A1 and the end A of the packaging sheet A.
2 are pulled out, and the end A2 of the packaging sheet A is shown in FIG.
After being folded along the upper surface B3 of the content B as shown in (c), the tip A1 is also folded along the upper surface B3 of the content B as shown in FIG. The ends A1 and the tip A1 are made of elastic bodies 6c, 6
By c, they are pressed against the upper surface B3 of the contents B and are prevented from coming off.

Thereafter, the sheet pressers 6d and 6d are shown in FIG.
As shown in FIG. 6 (e), the body winding guide 6 on the downstream side projects to the position above the center of the compression receiving plates 7, 7 as shown in FIG. 6 (f), and the front end A 1 of the packaging sheet A is moved to the end A 2. At the same time as being superposed on the outside, the overlapping end A2 and tip A1 are combined with the elastic body 6 on the lower surface of the body winding guide 6 on the downstream side.
c and the upper surface of the compression receiving plates 7 and 7, the tip A1
Adhesive tapes C1, C2, C2 sticking to the left-right center and both ends in the left-right direction are pressed against the terminal A2, and the protruding parts of the adhesive tapes C1, C2, C2 are stuck to both of them. To block.

After that, the elevator 5 is slightly lowered as shown in FIG. 6 (g) to loosen the compression of the contents B, and after the compression receiving plates 7 and 7 are pulled out to complete the body winding process,
As shown in FIG. 7 (a), the lateral folding guides 8 project in directions toward each other, and both side flaps A4 of the projecting ends A3 and A3 are inward along the side surfaces B2 and B2 where the contents B are opened. Fold it in and, following this, pusher 9
As shown in (b), the contents B are pushed along the upper surface 5a of the elevator 5 that has advanced and descended.

As a result, the lower flaps A5, A5 of the projecting ends A3, A3 hit the upper folding guides 10, 10 respectively and are folded up along the side faces B2, B2 where the contents B are opened, and subsequently the elevator. 5 in FIG. 7 (c)
The upper flaps A6, A6 rise as shown in FIG. 6A, and the upper flaps A6, A6 collide with the lower folding guides 11, 11 respectively, and are folded down along the side surfaces B2, B2 where the contents B open, and at the same time, the lower flap A5. , A5 are overlapped with each other, and the protruding portions of the adhesive tapes C2, C2 are stuck over both of them and closed, and the ear folding step is completed.

The contents B after the end of the ears are folded by the lower folding guides 11 and 11 and the latch 12 ...
When the elevator 5 is supported by the packaging end position P2 adjacent to 1 to start the packaging of the next content B and the elevator 5 starts to descend, the latch 12 is moved even if the lower folding guides 11, 11 move away from each other. When the next contents B are packed without removing the contents B after the packing from the packing end position P2 by the ...
… Stacked on top.

Further, when the tips of the adhesive tapes C2, C2 protruding from the projecting ends A3, A3 project below the contents B after the end of the edge folding, the lower folding guides 11, 11 are formed.
When the tips of the adhesive tapes C2 and C2 protruding downward are folded along the lower surface B4 of the contents B and attached, and the protruding lengths of the projecting ends A3 and A3 are longer than the height dimension of the contents B. At the same time, the tips of the upper flaps A6, A6 are folded along the lower surface B4 of the contents B by the lower folding guides 11, 11, and at the same time, the adhesive tape C
2, the protruding portion of C2 is attached and closed.

Further, when the outer dimension of the content B is changed and its height is changed, the transfer amount of the packaging sheet A by the feed roller 2a is changed, the lower limit position of the elevator 5 is changed, and horizontal folding is performed. When the height positions of the guides 8 are changed to change the height positions of the upper folding guides 10 and 10 and the width dimension of the contents B is changed, the transfer amount of the packaging sheet A by the feed roller 2a is changed to a reference value. Guides 6, 6,
When the lengthwise dimensions of the contents B are changed by moving the body-wrapping guides 6 and 6 in the sheet feeding direction to change the intervals between them, the upper folding guides 10 and 10 and the lower folding guides 11 and 1 are changed.
1 is moved in the left-right direction to change these intervals.

In the embodiment shown above, the feed roller 2a and the pressing roller 2b are used as the sheet supporting means 2 on the upstream side.
Although the support guides are provided as the downstream side sheet supporting means 3, respectively, the present invention is not limited to this, and other configurations may be used as long as the packaging sheet A can be supported horizontally, and the sheet feeding mechanism 1 also has a configuration. The structure is not limited to the one shown in the figure, and any other structure may be used as long as it has a structure in which the packaging sheets A can be fed one by one.

Further, the accumulated packaging sheets A are separated one by one and supplied to the packaging start position P1. However, the present invention is not limited to this, and the packaging sheets A cut out into a rectangular shape by being unwound from a sheet roll are packaged. The adhesive tape C1, C2, C2 may be supplied to the start position P1 and the sticking means may stick the tapes C1, C2, C2 sticking to the tip of the packing sheet A and sticking the sticky tapes C1, C2, C2. Although A is supplied to the packaging start position P1, the present invention is not limited to this. For example, a tape attaching mechanism may be provided during the packaging process or at the packaging end position, and the adhesive tape C1, C may be provided during or after the packaging.
2, C2 may be attached, or the fixing means may be glue other than the adhesive tape.

[0053]

Since the present invention has the above-mentioned structure, it has the following advantages.

1. At the same time that the tip of the packaging sheet is fed from the sheet supporting means upstream of the sheet feeding direction in the sheet feeding direction, the packaging sheet is supported on the sliding surface by moving the sliding surface in the sheet feeding direction and pulling it out. As it is hung on the downstream side sheet supporting means without sagging downward, the packaging sheet can be fed without being supported in the sheet feeding direction.

Therefore, as compared with the conventional one in which both sides of the packaging sheet are sandwiched by the upper and lower sandwiching pieces extending in the sheet feeding direction, the folds of the body winding are made orthogonal to the sheet feeding direction and the sheet feeding direction and the ear are folded. The folding transfer direction can be the same direction, the entire device can be downsized in the direction orthogonal to the edge folding transfer direction, and the feed belt and the upper and lower sandwiching pieces are horizontally provided in the sheet feeding direction so as to face both sides of the packaging sheet. Since it is not necessary, the structure can be simplified and the cost can be reduced accordingly.

[Brief description of drawings]

FIG. 1 is a partial vertical sectional front view of a sheet feeding device of a packaging machine showing an embodiment of the present invention, showing a solid line at the time of starting the feeding of a packaging sheet.

FIG. 2 is a partial vertical sectional front view showing the vicinity of the end of the supply of the packaging sheet.

3 is a cross-sectional plan view taken along line (3)-(3) of FIG.

FIG. 4 is a reduced vertical sectional front view showing the entire apparatus, showing the start of packaging and the end of packaging at the same time.

FIG. 5 is a reduced plan view of the same.

FIG. 6 is a partial reduced front view showing the body winding process in the order of steps.

FIG. 7 is a partial reduced front view showing the process of edge folding in the order of steps.

[Explanation of symbols]

A Packaging sheet A3 Overhanging end A'Supply path B Contents B2 Opening side surface 2 Sheet support means (upstream side) 3 Sheet support means (downstream side) 4 Sliding surface 5 Elevator 5b Hoistway

Claims (1)

[Claims] 1. A packaging sheet supply path is arranged orthogonally to an elevator hoistway, and the unwound packaging sheets are fed one by one toward the elevator hoistway, and the contents are fed along with the elevator hoistway. In the sheet feeding device of the packaging machine, the packaging sheet is wound around the packaging sheet and then rolled horizontally, and the projecting end portion of the packaging sheet protruding from the side surface where the contents are opened is folded along the side surface. Sheet support means are provided upstream and downstream of the sheet supply path in the sheet supply direction in a direction orthogonal to the sheet supply direction across the elevator hoistway, and a sliding surface is packaged over these sheet support means. Along the lower surface of the sheet supply path, it is provided so that it can be freely taken in and out in the sheet supply direction, and this sliding surface can be moved in the sheet supply direction in conjunction with the supply of the packaging sheet. The sheet feeding device of the characteristic packaging machine.