JPH0632307A - Device for wrapping body of article in wrapping machine - Google Patents

Abstract

PURPOSE:To wrap a body of an article with a sheet without causing wrinkles by a method wherein, when an upper face of the article is allowed to abut against the wrapping sheet by the elevation movement of an elevator and the side portions of the sheet are folded, the side portions are sucked by suction holes of folding guides and drawn downward along the body of the article according to the elevation of the article. CONSTITUTION:After a wrapping sheet A is fed up to a position of an elevation path 1a of an elevator 1 while both ends of the wrapping sheet A are held by suction conveyors 13 of a sheet feed mechanism, an article B is delivered onto the upper face of the elevator 1. Under this condition, when the elevator 1 is elevated, the upper face of the article B abuts against the sheet A, and each side portion A1 of the wrapping sheet A is folded by guide plates 4. When the upper face of the article B further advances between folding guides 5, 5, the side portions A1 are sucked to suction holes 5c by projection of both the guides 5 in the first step, and the sheet A is drawn downward by the subsequent elevation movement of the article B to be neatly folded along the body thereof. Thereafter, the side portions A1 are folded along the bottom surface B5 of the article by projection of the guides 5 in the second step and pasted thereon.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrapping machine of a wrapping machine for wrapping a wrapping sheet such as paper or outer wrapping paper around a substantially rectangular parallelepiped-shaped contents, and more specifically, a wrapping sheet supply path and an elevator hoistway are orthogonal to each other. And feed the packaging sheet to the elevator hoistway, and a pair of folding guides are provided to reciprocate in the direction orthogonal to the elevator hoistway, with the hoistway sandwiched between them. The present invention relates to a product in which contents are abutted against a packaging sheet and wrapped around the packaging sheet, and both sides of the packaging sheet are folded along both sides and the bottom of the contents by projecting movements of both folding guides.

[0002]

2. Description of the Related Art Conventionally, as disclosed in, for example, Japanese Utility Model Laid-Open No. 4-45202, as a body winding device for a packaging machine of this type, rotatable pressing rollers are respectively attached to the tip surfaces of both folding guides to the hoistway of an elevator. Both sides of the packaging sheet by projecting toward each other, making the space between these pressing rollers narrower than the width dimension of the contents when the elevator rises, and letting the contents abutting the packaging sheet pass between both pressing rollers. The parts are pressed against both sides of the contents, and when the bottom of the raised contents reaches the top position of both folding guides, the elevator is stopped rising and both folding guides move to protrude. In some cases, by supporting the bottom surface, both side edges of the packaging sheet are pressed against the bottom surface of the contents.

[0003]

However, in such a conventional body-wrapping device for a packaging machine, both sides of the contents move while being pressed against the pressing rollers by the lift of the elevator, and the bottom surface of the contents moves. After reaching the upper end position of the pressing roller, the pressing roller is moved orthogonally along the bottom surface of the contents by the protrusion movement of the folding guide, so the center position of the pressing roller is set to the extension line position of the bottom surface of the contents with the elevator. Until it reaches the extension line position of both sides of the contents by the protrusion movement of the folding guide after reaching, the corners located between the side and bottom of the contents are separated from the outer peripheral surface of the pressing roller, and pressing Even if you fold the both sides of the packaging sheet downwards along both sides of the contents with rollers and fold it, press it against the corners of the contents. Ra can not wrap-around in tight loose both side portions of the package sheet at the moment that away, there is a problem that significantly reduces the commercial value it is easy can wrinkles.

Therefore, in order to prevent this, the pressing roller is arranged so as to move in and out of the tip end surface of the folding guide, and is projected toward the corner of the contents by a spring so that the center position of the pressing roller is adjusted to the contents. The pressing roller is pressed against the corners of the contents until it reaches the positions of the extension lines on the bottom surface of the contents until it reaches the positions of the extension lines on the both sides of the contents. When the concave surface is formed on the inclined surface, there is a problem that the outer peripheral surface of the pressing roller is easily separated from the corner portion of the content.

In view of such conventional circumstances, it is an object of the present invention to fold the packaging sheet while pressing both side edges of the packaging sheet regardless of the shape of the corners.

[0006]

[Means for Solving the Problems] The technical means taken by the present invention to solve the above-mentioned problems are to elevate an elevator continuously up and down to the downstream end position of the folding guide in the elevator ascending / descending direction, and to set the contents between the folding guides. At the same time as the articles enter, the folding guides are made to project toward the hoistway of the elevator, and the tip surfaces of these folding guides are elastically pressed against both side surfaces of the contents.

[0007]

According to the above technical means of the present invention, after the contents collide with the packaging sheet as the elevator moves up and down, the folding guides are caused to project when entering between the folding guides so that the respective leading end surfaces of the packaging sheets. The both sides of the packaging sheet are elastically pressed against both sides of the contents through the both sides of the contents, and the contents move between the ends of the elastically pressed ends, so that the both sides of the packaging sheet are along the both sides of the contents. To the direction opposite to the moving direction, and then the bottom surface of the contents reaches the downstream end position of the folding guide, and at the same time, the tip end surface of the folding guide disappears and the folding guide is moved to the contents without time lag. The projecting movement is performed along the bottom surface of the packaging sheet, and both side edges of the packaging sheet are pulled and squeezed in the same direction.

[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 FIG. 2 and FIG. 3, a large number of packaging sheets A are stacked on the paper feed table 11 with paste sheets,
The uppermost wrapping sheet A is separated from the uppermost wrapping sheet A one by one by the sheet feeding mechanism 12 arranged so as to face the uppermost wrapping sheet A, and is fed toward the upstream end of the supply path A ′.
Of the suction conveyors 13 and 13, which are provided laterally opposite the left and right side portions A1 and A1 of the
The packaging sheet A is supplied toward the hoistway 1a of the elevator 1 by the sheet holding means 13b, 13b provided continuously to the 3a, and the left and right side ends A2, A2 of the packaging sheet A are supplied from the glue injection guns 14, 14 during this supply. The adhesives C, C are sprayed and applied upward to the upper surface of the packaging sheet A, and the upper surface B1 of the content B is abutted against the packaging sheet A by the elevation of the elevator 1.

The elevator 1 is formed such that the outer dimension in the left-right direction is smaller than the interval when the folding guides 5 and 5 which will be described later are projected at the first stage, and in the initial state, the elevator 1 is formed.
The upper surface 1b of the elevator 1b is lowered to the lower limit position of the hoistway 1a and made to stand by at the same height as the carry-in path B'of the content B, and the content B is transferred from the carry-in path B'to the elevator 1 by the carry-in mechanism 15 such as a pusher. After being loaded onto the upper surface 1b, the upper surface 1b
Is raised to a position slightly higher than the upper surfaces 5b and 5b of the folding guides 5 and 5, and the folding guides 5 and 5 are lowered after returning to the initial state after projecting the first step.

Near the hoistway 1a of the elevator 1, a pair of guide plates 2 and 2 facing the left and right side surfaces B2 and B2 of the contents B carried into the elevator 1 are arranged above them. A pair of fixed guides 4 and 4 are arranged parallel to each other with the hoistway 1a interposed therebetween.
The contents B are moved to the inner surfaces 2a, 2 of the guide plates 2, 2
It guides to the supply path A'of the packaging sheet A along a, and also guides from the supply path A'to the folding guides 5 and 5 described later along the inner surfaces 4a and 4a of the fixed guides 4 and 4.

The guide plates 2 and 2 are supported so as to be movable up and down as shown in the figure, for example, a drive unit 2 such as an air cylinder.
b, 2b are connected in series, and by the driving portions 2b, 2b, the upper surfaces 2c, 2c of the guide plates 2, 2 are moved upward to positions higher than the glue guides 3, 3 described later in the initial state, and the packaging sheet A is supplied. The upper surfaces 2c, 2c of the guide plates 2, 2 are moved to a position lower than the glue guiding guides 3, 3 when the elevator 1 is raised, or the upper surfaces 2c, 2c of the guide plates 2, 2 are moved closer to the road A '. It is fixedly arranged so as to be lower than the glue guiding guides 3, 3 and, if necessary, the upper surfaces 2c, 2 of the guide plates 2,
c is formed in a sawtooth shape in the sheet feeding direction.

Further, on the left and right outer sides of the guide plates 2 and 2, glue guides 3 and 3 formed of a material such as a fluororesin, to which the glue C is unlikely to adhere, are arranged in parallel and close to each other. The upper surfaces of the guide guides 3, 3 are the upper surfaces 2 of the guide plates 2, 2.
The sawtooth portions formed on c and 2c are formed in a sawtooth shape protruding in the same pitch in the sheet feeding direction at the same phase in the left-right direction or at a different phase.

Above the fixed guides 4 and 4,
Left and right sides B of the contents B raised by the elevator 1
A pair of folding guides 5 and 5 facing B2 and B2 are arranged so as to be reciprocally movable in the left and right direction with the hoistway 1a of the elevator 1 interposed therebetween. Elevator 1 with surfaces 5a and 5a vertically
The downstream end in the ascending / descending direction, in the present embodiment, the upper surfaces 5b, 5b are formed in an inverted L shape so as to be horizontal, and a plurality of suction holes 5c ... Are opened in the tip surfaces 5a, 5a to communicate with an air supply source (not shown). At the same time, the adjustable drive parts 5d, 5d such as an air cylinder that expands and contracts in two steps are connected in series, and the tip parts 5a, 5a are moved in two steps toward the hoistway 1a of the elevator 1 by the drive parts 5d, 5d. Make it protrude.

Drive portions 5d, 5d of the folding guides 5, 5
Are controlled by the control unit respectively, and in their initial state the respective tip surfaces 5a, 5a are slightly separated from the left and right side surfaces B2, B2 of the contents B to be lifted by the elevator 1, and the inner surfaces 4a of the fixed guides 4, 4 are 4a is made to stand by on the same vertical plane, and the upper surface B1 of the raised contents B is folded in the folding guides 5,
When the detector 5e such as a sensor detects the timing of reaching the upper side from the lower end position of 5, the protrusion of the first step is started and the tip surfaces 5a and 5a are projected to both side surfaces B2 and B2 of the content B, respectively. Apply elastically with optimum pressure.

Then, after these tip surfaces 5a, 5a enter the hoistway 1a of the elevator 1 and the elevator 1 descends, the second stage projection starts to start the tip surfaces 2a, 2a.
When a is brought closer, the tip surfaces 5a, 5a are separated from each other to return to the initial state after the operation of the carry-out mechanism, which will be described later, and at least when the tip surfaces 5a, 5a are projected, suction is made from the suction holes 5c.

Near these folding guides 5 and 5,
A delivery path B ″ for the contents B is provided horizontally at the same height as the upper surfaces 5b, 5b, and the contents B are not shown from the hoistway 1a of the elevator 1 after the second steps of the folding guides 5, 5 are projected. For example, it is carried out to the carry-out path B ″ by a carry-out mechanism such as a pusher.

Next, the operation of the body wrapping device of such a packaging machine will be described.

First, when the packaging sheet A is fed out toward the suction conveyors 13 and 13 by the operation of the sheet feeding mechanism 12, the sheet holding means 13 as shown in FIGS. 2 and 3.
b and 13b hold the front end of the packaging sheet A, the suction belts 13a and 13a move in the sheet feeding direction to pull out the packaging sheet A, and at the same time, the upper and lower sides A1 and A1 of the packaging sheet A are suction belts. It is adsorbed by 13a, 13a and supplied to the hoistway 1a of the elevator 1 without hanging down, and at the time of this supply, the upper surfaces 2a, 2 of the guide plates 2, 2
The a comes into contact with the lower surface of the packaging sheet A to support and guide it.

The movement of the suction belts 13a, 13a is stopped and the sheet holding means 13b, 13b are moved to the packaging sheet A.
The holding of the tip is released, and substantially at the same time, after the contents B are carried into the upper surface 1b of the elevator 1 by the carry-in mechanism 15 from the carrying-in path B'of the contents B and the carrying of the contents B is completed, the elevator 1 And the contents B rise along the inner surfaces 2a, 2a of the guide plates 2, 2.

Thereafter, as shown in FIG. 5, the upper surface B of the content B is
1 is abutted against the packaging sheet A and ascends along the inner surfaces 4a, 4a of the fixed guides 4, 4 to guide plate 2,
When 2 is vertically movable, its upper surfaces 2c, 2c are moved downward to a position lower than the glue guides 3, 3.

As a result, the left and right side portions A of the packaging sheet A are
1, A1 is pulled inward and the left and right sides B of the contents B
Packing sheet A along which the glue C and C adhere to
The inner surfaces of both left and right ends A2, A2 of the guides come in contact with the upper surfaces of the glue guiding guides 3, 3 to slightly adhere the glues C, but do not contact the upper surfaces 2c, 2c of the guide plates 2, 2 lower than this. Pass above it.

Thereafter, the contents B are raised as shown in FIG.
When the upper surface B1 of the above enters between the folding guides 5 and 5,
These folding guides 5 and 5 start projecting in the first step, and the tip surfaces 5a and 5a of the folding guides 5 and 5 are urged against the left and right side surfaces B2 and B2 of the contents B via the packaging sheet A and at the same time elastically pressed. Suction holes 5c on the tip surfaces 5a, 5a
The left and right side portions A1, A1 of the packaging sheet A are adsorbed by the ... And the contents B rise between the elastically pressed front end surfaces 5a, 5a. A1 is the left and right side surfaces B2, B2 of the contents B
Along the upper corners B3 and B3 of the contents B, the packaging sheet A is folded and pulled along the upper corners B3 and B3.

When the left and right edges A2 and A2 of the packaging sheet A do not project downward from the bottom surface B4 of the contents B after the folding, the glue C and C attached to the left and right sides of the contents B are used. At the same time that the bottom surface B4 of the contents B that has been attached to the surfaces B2, B2 and then lifted as shown in FIG. 1 reaches the same height as the top surfaces 5b, 5b of the folding guides 5, 5, at the same time. There is nothing that the tip surfaces 5a, 5a hit, and the folding guides 5, 5 project and move with no time lag to complete the projecting of the first step.

As a result, the upper surfaces 5 of the folding guides 5 and 5 are
b and 5b move in the same direction while pressingly contacting the bottom surface B4 of the content B, and the left and right side edges A2 and A2 of the packaging sheet A protruding below the bottom surface B4 of the content B are attached to the bottom surface B4 of the content B.
It is pulled along and squeezed, and the packaging sheet A contains the contents B.
At the same time it is folded along the upper corners B5, B5 of
The paste C is adhered to the bottom surface B4 of the contents B, and then the elevator 1 is lowered and the folding guides 5 and 5 start to project the second step as shown in FIG. The contents B are supported on the upper surfaces 5b and 5b of the folding guides 5 and 5, and then the contents B wrapped around the body are carried out to the carry-out path B ″ by the carry-out mechanism, and thereafter, the above-described operation is repeated.

On the other hand, FIG. 8 and FIG. 9 show another embodiment of the present invention, which is one side end of the packaging sheet A which is longer than the circumference of the contents B in the body-wrapping direction. Adhere the glue C only on the inner surface of A2, and insert the folding guide 5,
The suction hole 5 of the folding guide 5 facing the other side end A2 to which the glue C is not attached after the end of the protrusion of the first step
The suction of c ... is stopped, and then the elevator 1 descends, and the folding guide 5 facing the one side end A2 to which the glue C is attached starts to project the second step and the other side end A2. The folding guide 5 that faces the above does not project the second stage.

Therefore, the folding guide 5,
5 finishes the protrusion of the first step and folds the packaging sheet A along the upper corners B5, B5 of the contents B, and then the suction hole 5c of the folding guide 5 facing the other side end A2 of the packaging sheet A. When the suction of ... Stops, the other side end A2 is separated from the front end surface 5a of the folding guide 5, and the packaging sheet A itself moves toward the bottom surface B4 of the contents B by the elasticity of the packing sheet A itself, and thereafter, The upper surface 5b of the folding guide 5 facing the one side end A2 starts projecting in the second step, and one side end A2 is pulled along the bottom surface B4 of the contents B and outside the other side end A2. Along with overlapping, the both are adhered by the glue C attached thereto.

In the embodiment shown above, the upper surface B1 of the contents B is abutted against the packaging sheet A by raising the elevator 1, but the present invention is not limited to this, and the bottom surface B3 of the contents B is lowered by lowering the elevator 1. It may be made to abut against the packaging sheet A. In this case, the guide plates 2 and 2, the glue guiding guides 3 and 3, the fixed guides 4 and 4, and the folding guide 5 are provided.
5 are arranged upside down.

Further, the paper feeding mechanism 12, the suction conveyor 13 and the sheet holding means 13b are not limited to those shown in the figure, and may have other configurations as long as they perform the same operation.

[0030]

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

1. After the contents collide with the packaging sheet as the elevator moves up and down, the folding guides are pushed out when entering between the folding guides, and the tip ends of each are elastically attached to both sides of the packaging sheet through both sides of the packaging sheet. When the contents are pressed between the elastically pressed tip surfaces, both sides of the packaging sheet are pulled along the both sides of the contents in the opposite direction to the moving direction, After that, the bottom of the contents reaches the downstream end position of the folding guide, and at the same time, the tip end of the folding guide disappears, and the folding guide moves along the bottom of the contents without any time difference. Since it is pulled and squeezed in the same direction, it is possible to fold it while pressing both side edges of the packaging sheet regardless of the shape of the corners of the content.

Therefore, as the elevator rises, both side surfaces of the contents move while being pressed against the pressing roller, and after the bottom surface of the contents reaches the upper end position of the pressing roller, the pressing roller moves by the protruding movement of the folding guide. Compared to the conventional one that moves orthogonally along the bottom surface of the product, both sides of the packaging sheet can be tightly wound even if the corners of the content are formed to be concave, for example, in an arcuate surface or an inclined surface, and wrinkles do not occur. It becomes difficult to do so and the product value can be improved.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional front view of a body-wrapping device of a packaging machine showing an embodiment of the present invention, showing the end of the first step of folding guide.

FIG. 2 is a vertical cross-sectional front view showing a state after a packaging sheet is supplied.

FIG. 3 is a vertical sectional side view of the same.

FIG. 4 is a transverse plan view of the same.

FIG. 5 is a vertical cross-sectional front view showing a state immediately after abutment of the packaging sheet.

FIG. 6 is a vertical cross-sectional front view showing the time when the first step of the folding guide starts projecting.

FIG. 7 is a vertical cross-sectional front view showing a state where the second step of the folding guide is completed.

FIG. 8 is a vertical cross-sectional front view of the sheet feeding device of the packaging machine according to another embodiment of the present invention, showing the end of the protrusion of the first stage of the folding guide.

FIG. 9 is a vertical cross-sectional front view showing the end of the second protrusion of the folding guide.

[Explanation of symbols]

 A Packaging sheet A1 Side part A'Supply path B Contents B2 Side surface B4 Bottom surface 1 Elevator 1a Hoistway 5 Folding guide 5a Tip surface 5b Downstream end (upper surface)

Claims (1)

[Claims] 1. A packaging sheet supply path and an elevator hoistway are arranged orthogonally to each other, and a packaging sheet is fed toward the elevator hoistway, and a pair of folding guides are lifted up and down respectively with the hoistway sandwiched therebetween. Provided so that it can reciprocate in a direction orthogonal to the direction, the contents are pressed against the packaging sheet as the elevator moves up and down and wrapped around the packaging sheet, and both sides of the packaging sheet along both sides and the bottom of the packaging sheet due to the protruding movement of both folding guides. In a body-wrapping device of a packaging machine for body folding, the elevator is continuously moved up and down to the downstream end position of the folding guide in the elevator ascending / descending direction, and at the same time when the contents enter between the folding guides, the folding guides of the elevator are It is characterized in that the tip end surfaces of these folding guides are elastically pressed against the both side surfaces of the contents by making the protruding movement toward the hoistway. Wrapping device for packaging machine.