JPH0739626Y2 - Paper feeder of box making machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a sheet feeding device for feeding sheets to a box making machine.

(Prior Art) A box such as a Bliss box is composed of a wrap sheet L and an end sheet E as shown in FIG. 3, and in the box making machine, the wrap sheet L is bent at a position indicated by a broken line and its margin It is assembled by adhering the end sheet E at the portion La with an adhesive such as a hot melt adhesive (the assembled state is shown in FIG. 4).

Then, a general paper feeding device for supplying the lap sheet to a box making machine for forming this type of box is a hopper which holds a large number of lap sheets in a state where the longitudinal direction of the wrap sheet is directed toward the box making machine. Therefore, the kicker that reciprocates with a constant movement stroke by the crank mechanism or the like pushes out the lap sheets one by one and supplies them to the box making machine.

By the way, when manufacturing boxes with different height dimensions (H dimension in FIG. 4) with the same box making machine, wrap sheets having different longitudinal dimensions (l dimension in FIG. 3) according to the height are used. Although it is supplied, if the kicker movement stroke is set according to the lap sheet with the longest dimension in the longitudinal direction, when feeding a short lap sheet, the transport distance becomes long and the kicker's wasteful stroke may occur. However, there is a problem in that the time required for one sheet feeding becomes long and the box making ability of the box making machine deteriorates.

Therefore, a kicker is slidably provided on a reciprocating kicker rail, and a rack provided on the kicker rail and a rack provided on the kicker, as in the sheet feeding device disclosed in Japanese Patent Laid-Open No. 58-33448. The kicker can be installed at any position on the kicker rail by engaging with and the moving stroke of the kicker can be set according to the length of the supplied lap sheet to improve the box making capacity of the box making machine. There is.

(Problems to be Solved by the Invention) However, the paper feeding device disclosed in Japanese Patent Laid-Open No. 58-33448 described above has the following problems.

In this paper feeding device, since the position of the kicker is manually adjusted, there is a problem that the setup change time for the adjustment is long and the operating rate of the box making machine is reduced accordingly.

Further, since the position is set by the meshing of the racks, there is a problem that it is difficult to arrange the kicker at an accurate position due to the pitch of the rack teeth.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a sheet feeding device capable of easily and accurately setting the stroke of the kicker according to the length of the sheet to be fed. Especially.

(Means for Solving the Problems) A sheet feeding device of a box making machine of the present invention is an apparatus capable of feeding a plurality of types of sheets having different lengths in a sheet feeding direction to the box making machine. The pusher cylinder disposed toward the machine is attached to the output part of the pusher cylinder, which is brought into contact with the end portion of the sheet to be fed and moved by the operation of the pusher cylinder to push out the sheet to the box making machine. By detecting and controlling the pusher cylinder, a plurality of pairs of limit switches for setting the moving stroke of the kicker according to the length of the sheet to be supplied are arranged along the longitudinal direction of the pusher cylinder. Above the pusher cylinder, a fixed front guide and a rear guide whose position can be adjusted with respect to the front guide are provided, and sheets are accommodated in a stacked state between both guides. A hopper is provided, and an adhesive supply means for automatically supplying an adhesive to the adhesive margin portion of the sheet extruded by the kicker is provided on the front side of the front guide of the hopper.

In the present invention, the pusher cylinder may be a cylinder in which the rod expands and contracts by supplying or discharging air pressure or hydraulic pressure, or a rodless cylinder in which the slider portion moves by supplying or discharging air pressure or hydraulic pressure.

(Operation) With the above configuration, the mitt switch, which is appropriately arranged in the longitudinal direction of the pusher cylinder, detects the position of the kicker and controls the pusher cylinder to set the movement stroke of the kicker. It can be easily and accurately changed, and the seat is housed in the hopper with the position-fixed front guide as a reference.By setting the positions of multiple pairs of limit switches according to the length of the seat, the kicker can be set. Can be moved with the minimum stroke suitable for the seat length.

(Example) Next, the Example of this invention is described based on drawing. 1 is a front view of the sheet feeder 1 of this embodiment and a box making machine 2 to which wrap sheets are fed by the sheet feeder 1, and FIG. 2 is a box making machine shown in FIG. 2 is a left side view of FIG.

First, a sheet feeding device 1 for supplying the wrap sheet L to the box making machine 2.
Will be explained. In this embodiment, in order to manufacture three types of boxes having different heights, three types of wrap sheets having different lengths in the longitudinal direction (hereinafter, long sheets to large sheets,
Medium and small sheets).

A pusher cylinder 4 is provided on the base 3 toward the box making machine 2. The pusher cylinder 4 is a rodless cylinder, is connected to a compressed air source (not shown) through a direction switching solenoid valve 5, and is connected to the direction switching solenoid valve 5.
The slide portion (output portion) 6 is moved forward and backward by changing the supply direction of the compressed air by switching. A kicker 7 is attached to the slide portion 6 so as to come into contact with the end portion of the lap sheet L to be supplied and push the lap sheet L to the box making machine 2 as the slide portion 6 advances.

A lap sheet hopper 8 for stacking a large number of lap sheets L is provided above the pusher cylinder 4, and the lap sheet hopper 8 is composed of a side guide 9, a front guide 10, and a rear guide 11. It A gap is formed below the front guide 10 so that only one lap sheet L can pass through. Also, the rear guide
11 is provided so as to be movable in the longitudinal direction of the pusher cylinder 4 according to the length of the lap sheet L, and the movement of the rear guide 11 may be automatically performed using a cylinder or the like. . The lap sheet hopper 8 is provided with a limit switch (not shown) for detecting the presence or absence of the lap sheet L.

Next, the limit switch for setting the moving stroke of the kicker 7 will be described.

There are backward end limit switches 12a, 13a, 14a at the movement start position of the kicker 7 for the large, medium and small sheets respectively, and at the stop position of the kicker 7, the forward end limit switches are provided. Switch 12b, 13b, 14b
Are provided respectively.

Each of these limit switches 12a, 13a, 14a, 12b, 13b, 14b
Detects the position of the kicker 7 and detects the position of the pusher cylinder 4
When the kicker 7 comes into contact with the respective detecting portions of the limit switches 12a, 13a, 14a, 12b, 13b, 14b, the supply direction of the compressed air of the direction switching solenoid valve 5 is switched. The moving direction of the kicker 7 is switched from forward to backward or backward to forward. As a result, when supplying a large sheet, the kicker 7 reciprocates with the moving stroke corresponding to the length of the large sheet by the backward end limit switch 12a and the forward end limit switch 12b. Similarly, for the middle and small seats, the rear end limit switches 13a, 14
The kicker 7 is moved by a moving stroke corresponding to each length by the a and the forward end limit switches 13b and 14b. Each limit switch 12a, 13a, 14a, 12b, 13b, 14
The detection of either of b is performed by a changeover switch of a control panel (not shown).

Next, the box making machine 2 to which the wrap sheet L is supplied by the sheet feeding device 1 will be briefly described.

An inner die 16 and an outer die 17 are provided in the base frame 15, and the inner die 16 can be moved up and down by a cylinder 18.
Then, the supplied wrap sheet L is positioned on the upper surface of the outer mold 17 and is folded at the position of the broken line shown in FIG. 3 in cooperation with the outer mold 17 by the lowering of the inner mold 16.

End sheet feeding units (shown in FIG. 2) 19 for feeding the end sheets E are provided on the left and right sides of the base frame 15 (directions orthogonal to the paper surface in FIG. 1). This is the tilting member 20
A number of end sheets E held upright
The end sheet hopper 22 and the inner mold 16 so that the weight 21 having a roller at the lower part pushes it forward.
And a kicker 23 that pushes the end sheets E downward from the end sheet hopper 22 one by one.

Further, in the base frame 15, a stopper (shown in FIG. 1) 24 that determines the stop position of the lap sheet L fed by the sheet feeding device 1 is provided. The stopper 24 is for positioning the lap sheet L on the upper surface of the outer mold 17, and is a fixed stopper for a large sheet according to the length of the wrap sheet L.
25, movable stoppers 26 for medium sheets and movable stoppers 27 for small sheets are provided at three locations. Movable stopper
Numerals 26 and 27 are configured so that they can be projected onto the conveying surface of the lap sheet L by cylinders 28 and 28. This each stopper 2
The selection of 5, 26 and 27 is automatically performed by the changeover switch of the control panel (not shown) described above.

Reference numeral 29 in FIG. 1 is a device (adhesive supply means) for supplying a hot-melt adhesive for adhering the wrap sheet L and the end sheet E. The device 29 includes a hot melt gun 30 arranged on the left and right so that the hot melt adhesive can be applied to the lapping margin La of the conveyed wrap sheet L, and an application for supplying the hot melt adhesive to the hot melt gun 30. , A pilot solenoid valve 32 for controlling the supply of compressed air to the hot melt gun 30, and a lapping margin La of the lap sheet L.
Is detected and the pilot solenoid valve 32 is opened to discharge the hot melt adhesive from the hot melt gun. The amount of the hot melt adhesive applied is determined by appropriately adjusting the pressure of the compressed air supplied to the applicator 31 with the pressure reducing valve 34.

The operation of the sheet feeding device 1 having the above configuration will be described.

When a large sheet is supplied to the box making machine 2 in order to manufacture the box with the highest height, set the changeover switch of the control panel to "large".
By switching to, the backward end limit switch 12a and the forward end limit switch 12b are in a detectable state.
At the same time, the movable stoppers 26, 27 are lowered. Then, the pusher cylinder 4 starts to operate, and the kicker 7
Is the backward end limit switch 12a and the forward limit switch 1
2b is reciprocated, and the large sheets located at the bottom of the lap sheet hopper 8 are pushed out one by one and supplied to the box making machine 2.

During this supply, the photoelectric switch 33 detects the glue margin of the large sheet and the hot melt adhesive is automatically applied from the hot melt gun 30 to the glue margin.

The large sheet that has been pushed out is a fixed stopper for the large sheet
The front end side comes into contact with 25 and positioning is performed in the box making machine 2. Then, the inner mold 16 of the box making machine 2 is lowered, one end sheet E is pushed down from the end sheet hopper 22 of the end sheet feeding section 18, and a large sheet is folded in cooperation with the outer mold 17. Then, the large sheet and the end sheet E are fixed with a hot melt adhesive to manufacture a box.

Similarly, when supplying a medium sheet or a small sheet to the box making machine 2, set the changeover switch of the control panel to "medium" or "small".
By switching to the backward end limit switches 13a, 14a and the forward end limit switches 13b, 14b.
Is in a detectable state. Thus, when supplying a medium sheet, the kicker 7 reciprocates between the backward end limit switch 13a and the forward end limit switch 13b, and when feeding a small sheet, the backward end limit switch 14a.
The kicker 7 reciprocates between the limit switch 14b and the forward end limit switch 14b. In the case of "medium", the movable stopper 26 rises, and in the case of "small", the movable stopper 27 rises. The box making machine for each sheet is the same as that for the large sheet.

In this way, the moving stroke of the kicker 7 is set by the backward end limit switches 12a, 13a, 14a and the forward end limit switches 12b, 13b, 14b according to the length of the seat, so that the moving stroke can be accurately and easily set. Since the lap sheet L is accommodated in the hopper 8 based on the front guide 10 that can be set and fixed in position, the kicker 7 can be set to the sheet length by setting the positions of the limit switches according to the length of the sheet. The wrapping sheet L can be moved with the shortest stroke suitable for the length, so that the supply time of the lap sheet L can be shortened, and the operation rate of the box making machine 2 and the box making capacity can be improved.

In the present invention, a general brake cylinder having a rod may be used as the pusher cylinder, but if the rodless cylinder is used as in the above embodiment, the total length of the sheet feeding device 1 can be shortened and space saving can be achieved. Can be achieved.

(Effects of the Invention) As described in detail above, the present invention combines a plurality of pairs of limit switches and a hopper equipped with a fixed guide and a movable guide to allow the kicker according to the seat length without any special setup change. Since it can be moved with the shortest stroke, a plurality of types of sheets can be efficiently supplied to the box making machine, and the operating rate and box making capacity of the box making machine can be significantly improved. Further, the adhesive supply means provided on the front side of the hopper can automatically supply the adhesive to the sheet while it is being sent to the box making machine, so that the productivity of the box making machine can be further improved.

[Brief description of drawings]

FIG. 1 is a front view of a sheet feeding device and a box making machine fed by the sheet feeding device according to an embodiment of the present invention, FIG. 2 is a left side view of FIG. 1, and FIG. FIG. 4 is a development view of an example of a box manufactured by the box making machine shown in FIG. 1, and FIG. 4 is a perspective view of the box made by the box making machine shown in FIG. 1 …… Paper feeding device 2 …… Box making machine 4 …… Pusher cylinder 7 …… Kicker 12a, 13a, 14a …… Reverse end limit switch 12b, 13b, 14b …… Forward end limit switch

Claims (1)

[Scope of utility model registration request] 1. A device capable of supplying a plurality of types of sheets having different lengths in a paper feeding direction to a box making machine, and supplying the sheet to an output part of a pusher cylinder arranged toward the box making machine. The sheet should be supplied by abutting the end of the sheet to be moved and moving by the operation of the pusher cylinder to push the sheet to the box making machine, detecting the position of the kicker and controlling the pusher cylinder. A plurality of pairs of limit switches, which set the moving stroke of the kicker according to the length of the seat, are arranged along the longitudinal direction of the pusher cylinder, and a position-fixed front guide and the front guide are provided above the pusher cylinder. A rear guide whose position is adjustable with respect to each other, a hopper for accommodating sheets in a stacked state is arranged between the guides, and the front of the hopper is provided. The front guide, paper feeder box former, characterized in that arranged the adhesive supply unit automatically supplying the adhesive to the glue margin portion of the sheet to be extruded by the kicker.