JPH0565112A - Sheet feeding device - Google Patents

Abstract

PURPOSE:To prevent the positional slipping from happening at the time of stopper hitting while linearly carrying a packaging sheet, regardless of the position of a feeding belt to the packaging sheet. CONSTITUTION:A packaging sheet A is folded along the sheet abutment surfaces 2a, 6a of feeding belts 2, 6 and the sheet abutment surfaces 3a, 7a of mountain shaped guide 3, 7; and folding lines A2, A3 are formed in the carrying direction. By doing this, the nerve of the packaging sheet A in the carrying direction becomes stronger, and the straight moving property in the carrying direction is increased, and at the same time, the advancing direction leading end A1 of the packaging sheet A becomes hard to be buckled when the packaging sheet A hits stoppers 4, 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet feeding device used in a packaging machine for wrapping a packaging sheet along the outer surface of a box-shaped content, and more specifically, a feeding belt for feeding a packaging sheet supplied from a sheet supply section. When the packaging sheet is conveyed linearly in accordance with the above operation, the leading end of the packaging sheet in the traveling direction is abutted against a stopper and stopped at a predetermined position.

[0002]

2. Description of the Related Art Conventionally, as a sheet feeding device of this type,
For example, as disclosed in Japanese Utility Model Laid-Open No. 63-126203, two feed belts are abutted on both sides of a packaging sheet and laid horizontally in parallel, and both feed belts are operated at the same speed. When the packaging sheet is conveyed in a straight line, and the stopper arranged in front of it is stopped by abutting the leading edge of the packaging sheet in the traveling direction, when the packaging sheet is resized and the dimension in the direction orthogonal to the transportation direction changes, both There is one in which the distance between the feeding belts is changed so that the feeding belts are brought into contact with both sides of the resized packaging sheet.

[0003]

However, in such a conventional sheet feeding apparatus, since it is necessary to adjust and move the feeding belt according to the size change of the packaging sheet, the structure becomes complicated and the cost is reduced. Not only is it expensive, but the adjustment work is cumbersome and inconvenient to use, and since the packaging sheet is conveyed in a flat shape by two feed belts, the bending rigidity of the packaging sheet, the so-called stiffness of the packaging sheet, is weak, and it acts as a stopper. There is a problem that the tip of the packaging sheet in the traveling direction is easily buckled at the time of hitting, and the buckling causes the packaging sheet to shift its position and cannot be accurately stopped at a predetermined position, resulting in a significant decrease in accuracy.

In view of the above conventional circumstances, it is an object of the present invention to prevent positional displacement when the stopper strikes while linearly transporting the packaging sheet regardless of the position of the feed belt with respect to the packaging sheet.

[0005]

The technical means taken by the present invention to solve the above-mentioned problems is to provide a mountain-shaped guide horizontally in parallel with the feed belt so as to be separated from the feed belt. And the sheet contact surface of the feed belt are arranged in a stepped manner, and a fold line is formed on the packaging sheet in the conveying direction.

Further, it is preferable that the folding line is formed along one side edge of the sheet contact surface of the feed belt.

[0007]

According to the above-mentioned technical means of the present invention, the packaging sheet is bent along the sheet contact surface of the feed belt and the sheet contact surface of the mountain-shaped guide, and the folding line is formed in the conveying direction. The rigidity of the packaging sheet in the conveying direction becomes stronger, the straightness in the conveying direction increases, and the tip of the packaging sheet in the traveling direction becomes less likely to buckle when the stopper strikes.

Since the folding line is formed along one side edge of the sheet contact surface of the feed belt, the frictional force of the sheet contact surface of the feed belt with respect to the packaging sheet increases, and the fold line in the conveying direction increases. The straightness is further increased.

[0009]

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. 1, after the packaging sheet A is horizontally conveyed from the sheet feeding section 1 to an intermediate conveyance position P1 by a predetermined length, it is turned to a direction orthogonal to the conveyance direction, and the intermediate direction is obtained. It is for horizontally transporting in a plane L shape of a predetermined length from the transport position P1 to the elevator lift position P2.

The sheet supply unit 1 stacks unspecified size packaging sheets A on the upper surface thereof, abuts one side end A4 of the packaging sheets A with the reference surface 1a, and contacts the uppermost packaging sheet A. A feeding roller 1b is provided in contact with the feeding roller 1b. By intermittent operation of the feeding roller 1b, the uppermost packaging sheets A are separated one by one and fed out along the reference surface 1a. In the case of this embodiment, the sheet feeding unit 1 is used. The wrapping sheet A fed out from the
Is conveyed to the feed belt 2 which will be described later.

In the front half portion R1 of the sheet conveying path from the sheet feeding portion 1 to the intermediate conveying position P1, a feed belt 2 and a mountain-shaped guide 3 are separately installed in parallel and horizontally.

The feed belt 2 is the feeding roller 1 described above.
The sheet feeding section 1 is intermittently controlled in operation in cooperation with the sheet feeding section b, and is provided in parallel to the reference surface 1a side of the sheet feeding section 1. Either one of the upper and lower surfaces of the packaging sheet A fed from 1 is arranged at the same height as the lower surface A1 in the illustrated example.

The chevron-shaped guide 3 has the entrance of the sheet contact surface 3a facing and abutting against the packaging sheet A at the both feed belts 2, 2.
The two sheet feeding surfaces 2a, 2a are arranged at substantially the same height as the sheet abutting surfaces 2a, 2a, and the portions of the sheet abutting surface 3a other than the entrance are gradually fed forward in the feeding direction of the packaging sheet A. The fold line A2 is formed in the conveyance direction by bending the packaging sheet A by arranging the sheet contact surfaces 2a, 2a at different height positions, in the illustrated example, in a stepped shape upward.

At the intermediate conveying position P1, a stopper 4 is provided as an abutting surface of the front half R1 of the sheet conveying path so as to be adjustable, and a pair of upper and lower feed rollers 5a, 5a are provided at the exit side of the intermediate conveying position P1. 5b is arranged close to the extension line of the reference surface 1a of the sheet supply unit 1.

One or both of these feed rollers 5a and 5b are linked to a drive source to rotate toward the lift position P2 of the elevator, and are arranged so that they can move vertically toward and away from each other. It is moved to form a gap through which the packaging sheet A passes, and is controlled so that the feeding sheet belts 2 and 2 come into contact with each other and hold the end portion of the packaging sheet A after being stopped.

Further, the feed belt 6 and the mountain-shaped guide 7 are also installed in parallel in parallel in the latter half R2 of the sheet conveying path from the intermediate conveying position P1 to the elevator rising position P2.

The feed belt 6 is composed of the two feed belts 2 and 2 described above.
The sheet is contacted with the sheet contacting surface 6a of the feed belt 6 by being intermittently operated in association with the sheet feeding path, and is provided so as to approach the entrance side of the intermediate conveyance position P1 and orthogonal to the front half R1 of the sheet conveyance path. They are arranged at the same height as the sheet contact surfaces 2a and 2a of the sheets 2 and 2.

Two chevron-shaped guides 7 are provided in parallel with each other with the feed belt 6 interposed therebetween, and the inlet of either one or both of these chevron-shaped guides 7 and 7a of the sheet contact surfaces 7a and 7a is fed to the feed belt. The sheet contact surface 6a of the feed belt 6 is disposed at substantially the same height as the sheet contact surface 6a, and the portion of the sheet contact surface 6a other than the inlet is gradually moved forward in the transport direction of the packaging sheet A. 6a is arranged downward in a stepped manner, and the packaging sheet A is placed on the sheet contact surface 6a of the feed belt 6.
By folding along one side edge 6b, the folding line A3 is formed in the transport direction.

At the lift position P2 of the elevator, a stopper 8 is provided as an abutting surface of the latter half R2 of the sheet conveying path.
Adjustably project.

On the other hand, at the positions facing the sheet contact surfaces 2a, 2a, 6a of the respective feed belts 2, 2, 6 via the gaps through which the packaging sheet A passes, the holding bodies 9a, 9b,
9c is arranged, and the packaging sheet is vertically sandwiched between the holding bodies 9a, 9b, 9c and the sheet contact surfaces 2a, 2a, 6a.

In the case of the present embodiment, the sheet contact surface 2 of both feed belts 2 and 2 arranged in the front half portion R1 of the sheet conveying path.
The holding bodies 9a, 9a facing the inlets of a, 2a are rotatable pressing rollers, and the holding bodies 9b, 9b facing the outlets of the sheet contact surfaces 2a, 2a of both feed belts 2, 2 and the sheet conveying A holding body 9c, which faces the sheet contact surface 6a of the feed belt 6 arranged in the latter half R2 of the path, is a ball that is movably supported in the vertical direction, and is pressed by the pressure rollers 9a, 9a and the ball 9b. Using the weight of 9b, 9c ..., the packaging sheet A is attached to the sheet contact surfaces 2a, 2
It is brought into pressure contact with a and 6a.

Next, the operation of the sheet feeding device will be described.

First, as shown in FIG. 1, the feeding roller 1
By the intermittent operation of b, the wrapping sheet A is fed out along the reference surface 1a of the sheet feeding unit 1, and the leading end A1 of the wrapping sheet A in the traveling direction is fed through the feeding roller 1c to the both feed belts of the front half R1 of the sheet conveying path. After being conveyed to 2 and 2, the packaging sheet A is conveyed thereafter with the intermittent operation of both feed belts 2 and 2.

At this time, the packaging sheet A is, as shown in FIG.
Folding along the sheet contact surfaces 2a, 2a of both feed belts 2, 2 and the sheet contact surface 3a of the chevron-shaped guide 3, a fold line A2 is formed in the transport direction, and the rigidity of the packaging sheet A in the transport direction is increased. It becomes stronger and straightness in the transport direction increases.

The leading end A1 of the packaging sheet A in the traveling direction
Hits the stopper 4 at the intermediate conveyance position P1, but the forward end A1 in the traveling direction does not buckle and stops at the intermediate conveyance position P1.

After that, a pair of upper and lower feed rollers 5a, 5
When b moves, the packaging sheet A is conveyed orthogonally from the exit of the intermediate conveyance position P1, and the leading end A1 in the traveling direction is conveyed to the feed belt 6 in the latter half R2 of the sheet conveyance path. The packaging sheet A is conveyed with the intermittent operation of the feed belt 6.

At this time, the wrapping sheet A is, as shown in FIG.
A folding line A3 is formed along the one side edge 6b of the sheet abutting surface 6a of the feed belt 6 and the sheet abutting surfaces 7a, 7a of the chevron-shaped guide 7 in the conveying direction, and the wrapping sheet A in the conveying direction is formed. The stiffness increases, and the straightness in the transport direction increases further.

The front end A1 of the packaging sheet A in the traveling direction
Hits the stopper 8 at the lift position P2 of the elevator, but the forward end A1 in the traveling direction does not buckle and stops at the lift position P2 of the elevator.

Further, in this embodiment, when the packaging sheet A is conveyed to the lifted position P2 of the elevator, the sheet presser 10 operates to temporarily fix the packaging sheet A immovably, and then, as shown in FIG. While the box-shaped contents B are conveyed above the packaging sheet A and the elevator 11 descends to wind the packaging sheet A in a cylinder, the box-shaped contents B rolled in a cylinder are horizontally moved along the transfer path 12, The projecting end portions A5 and A5 of the packaging sheet A projecting from both side surfaces B1 and B1 in a square tubular shape are folded along the side surface B1.

In the embodiment shown above, one side end A4 of the packaging sheet A of an unspecified size is provided on the sheet supply unit 1 with the reference surface 1a.
However, the present invention is not limited to this, and both side edges of the packaging sheet A may be brought into contact with the reference surfaces and placed on the basis of the center. In this case, the packaging sheet A If the size is changed and the dimension between both ends changes, the interval between both reference planes is adjusted accordingly.

Further, the packaging sheet A was horizontally conveyed in the shape of a plane L from the sheet supply unit 1, but this is not a limitation, and the arrangement of the sheet supply unit 1 may be changed to the intermediate conveyance position P1 or the like to convey the packaging sheet A. It may be conveyed horizontally in a straight line.

Further, the arrangement position and number of the feed belts 2, 2, 6 and the shape of the mountain-shaped guides 3, 7, 7 are not limited to those shown in FIGS. The chevron guide 3 is formed so that the bending lines A2 and A3 are formed as shown.
7 and 7 are arranged, or the front half R1 of the sheet conveying path is provided with one feeding belt 2 similarly to the rear half R2 of the sheet conveying path, and the packaging sheet is provided along one side edge of the sheet contact surface 2a. A may be bent.

[0034]

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

1. The packaging sheet bends along the sheet contact surface of the feed belt and the sheet contact surface of the mountain-shaped guide, and the fold line is formed in the transport direction, so that the stiffness of the packaging sheet in the transport direction becomes stronger and In addition to increasing straightness in the direction, the tip of the packaging sheet in the traveling direction does not buckle easily when the stopper strikes, preventing displacement when the stopper strikes while linearly transporting the packaging belt regardless of the position of the feed belt with respect to the packaging sheet. it can.

Therefore, compared to the conventional one in which the feed belt needs to be adjusted and moved according to the size change of the packaging sheet, the packaging sheet of an unspecified size can be conveyed in a straight line without adjustment, and the structure is simplified and the cost is reduced. Not only can the number be reduced, the adjustment work associated with the size change of the packaging sheet is eliminated, and the usability is improved, and the packaging sheet can be accurately stopped at a predetermined position to improve the accuracy.

2. Since the folding line is formed along one side edge of the sheet contact surface of the feed belt, the frictional force of the sheet contact surface of the feed belt with respect to the packaging sheet is increased, and the straightness in the transport direction is further increased. Therefore, regardless of the position of the feed belt with respect to the packaging sheet, the packaging sheet can be conveyed in a straight line even with one feeding belt.

Therefore, the structure can be further simplified and the cost can be further reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of a sheet feeding apparatus according to an embodiment of the present invention with a part cut away.

FIG. 2 is a partially enlarged vertical sectional view taken along line 2-2 of FIG.

FIG. 3 is a partially enlarged vertical sectional view taken along the line 3-3 in FIG.

FIG. 4 is a perspective view showing a packaging process.

[Explanation of symbols]

A Packaging sheet A1 Forward direction tip A2, A3 Bending line 1 Sheet feeding part 2,6 Feed belt 2a, 6a Sheet contact surface 3,7 Crest guide 3a, 7a Sheet contact surface 4,8 Stopper 6b One side edge

Claims (2)

[Claims] 1. A sheet feeding device that conveys a packaging sheet supplied from a sheet supply unit linearly in accordance with the operation of a feed belt and stops the packaging sheet at a predetermined position by abutting a leading end in a traveling direction of the packaging sheet against a stopper. , A mountain-shaped guide is installed horizontally in parallel with the feed belt, and the sheet contact surface of this mountain guide and the sheet contact surface of the feed belt are arranged in a stepwise manner, and a fold line is formed on the packaging sheet. A sheet feeding device characterized by being formed in the conveying direction. 2. The sheet feeding apparatus according to claim 1, wherein the folding line is formed along one side edge of the sheet contact surface of the feeding belt.