JPS581004B2 - Coating device for plate-shaped objects - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for covering a flat object with a sheet, and more particularly to a device for covering a cargo handling platform (hereinafter referred to as a pallet) with a sheet of soft plastic material or the like in advance.

In recent years, packaging logistics systems have been streamlined, and as part of this, pallet transportation has become widespread.In particular, so-called "pallet shrink packaging", in which the cargo is packed while still on a pallet using heat-shrinkable film, is effective for displaying the cargo and simplifies the packing process. Its application fields are expanding due to its many advantages, such as moisture-proofing and moisture-proofing effects.

In the above-mentioned "pallet shrink packaging", as shown in Fig. 1, a cargo 2 is placed on a pallet 1a, a bag-shaped heat shrink film 3 is placed over it, and the film 3 is contracted by heating from the outside, and the shrinkage force is used to shrink the cargo. 2 to pallet 1a
In order to do this, it is necessary to fix the lower edge of the film 3 to the pallet 1a, and the method for this is to fix the lower edge of the film 3 to the pallet by the flowing action of hot air during the normal heating process. The pallet 1a is folded downward along the outer periphery of the Na film 3 to enclose the pallet 1a, and when heated, the lower edges of the film 3 are fused together and contracted to form the enclosing portion 4 of the film.

However, in this case, the cargo 2 is placed directly on the pallet 1a, the pallet 1a and the film 3 are not in close contact with each other, and the cargo 2 is placed in the gap between the pallet Ha and the film 3, the gap between the components of the pallet 1a, etc. communicates with the atmosphere.

If the cargo 2 dislikes moisture, this will cause problems due to the influence of the atmosphere.

As a countermeasure against this, as shown in FIG.
Insert the sheet 5 and the bag-shaped film 3 onto the pallet 1a.
If the outer circumference of the cargo 2 is adhered to each other during the heating process,
The moisture-proofing effect is improved without direct communication with the atmosphere.

By the way, in the above packaging process, the work of supplying the sheet 5 onto the pallet 1a and fixing it to the pallet 1a has conventionally been done manually due to lack of suitable equipment, so this type of work process is This was a problem in mechanization.

The present invention was developed in order to solve the above-mentioned problems, and provides an apparatus that supplies a sheet cut to a fixed size onto a flat object such as a pallet and covers the object with the sheet. The purpose is to mechanize the work of covering pallets, etc., which conventionally required manual labor, to save labor and improve work efficiency, and to obtain a highly moisture-proof packaging form in the heat-shrink film packaging process.

Examples thereof will be described below with reference to the drawings.

FIG. 3 shows an apparatus according to the invention, in which an object 1 (pallet 1a, plate 1b) is covered with a sheet 5.

FIG. 4 shows an outline of the apparatus according to the present invention, in which the sheet feeding device 6 includes a rolled sheet 50, an unwinding device 7, and a guide roll 8.
, a guide plate 9, and a sheet running line 1 extending above the object 1 waiting to be covered with the sheet 5 is formed along the surfaces of the guide roll 8 and the guide plate 90 as shown by the broken line in the figure. The 3-seat 50 travel line l is the point P1, P
There is a horizontal bar 10 which is formed approximately horizontally between the seats 2 and 2 and which moves along the traveling line 1 between them, and a pair of chucks 11 are provided at both ends of the horizontal bar 100 corresponding to the traveling width of the sheet 50. , the horizontal bar 10 is an endless chain (or the same applies below the belt)
When the chain 12 is driven, the chuck 11 moves along the path of the chain 12.

The arrangement pitch A of the horizontal bar 10 is normally set equal to the required cutting length of the sheet 50, so that the rolled sheet can be processed at the right time and in the appropriate size without waste.

The sheet holding device 13 is provided above the sheet covering portion of the object 1 and is composed of a frame 14 that moves up and down and a plurality of elastic contactors 15 attached thereto. The contact pressure element 15 approaches and separates from above.

A cutting device 16 is also provided above the running line l of the seat 50 and operates in a direction perpendicular to the running line l.

The cutting mechanism is generally one that melts and cuts the electrical resistance wire 17 stretched over the sheet running width by bringing it into contact with the sheet 5, but a blade that moves up and down may also be used.

Furthermore, in order to form fused portions 5C at the four corners of the sheet 5 as shown in FIG. 3 on the outer periphery of the covered surface of the object 1,
An adhesive device 18 that approaches and separates in accordance with the position is provided.

The welding means is to bend and press the sheet 5 at the four corners of the object 1 using a heating plate 19 containing a built-in electric resistor, and heat it to form the welded portion 5C on the sheet 5.
The sheet 5 is fixed to the object 1 along with the contraction action.

As an example, the arrangement relationship between the heating plate 19 and the contact pressure element 15 is as follows.
The result will be as shown in the figure.

A pair of locking elements 20 and a pair of release elements 21 are arranged on the travel line l of the seat 50 in correspondence with the moving path of the chuck 11, and when the chuck 11 comes into contact with the locking element 20 during movement, the chuck 11 is guided. Grasp the tip of the sheet 5 waiting on the plate 9,
When it comes into contact with the release element 21, it operates to release the sheet it is gripping.

The lock 20 is normally connected to the cutting device 1 in the direction of travel of the seat 50.
The release element 21 is preferably provided immediately after the guide plate 9 at the front stage of the lock element 6, and the release element 21 is disposed at the rear stage of the lock element 20 at a distance corresponding to the required sheet cutting length A.

FIG. 6 shows an example of the chuck 11, where the claw 11a is the shaft 1l.
It has an integral structure with the screw 11c via b.

In FIG. 5, the stop pin 11d, which is integrally constructed with the claw 11a, is inserted into the hole 11e provided in the horizontal bar 10, and the claw 11a is pressed against the lower surface of the horizontal bar 10 by the tension of the spring 11f, and grips the sheet 5. I'm here.

FIG. 7 shows the opening/closing operation of the claw 11a, and FIG.
When the pawl 11a begins to rotate clockwise in the figure through the shaft 11b and rotates approximately 90 degrees, the stop pin 11d overlaps with the hole 11e, and the stop pin 11d is recessed into the hole 11e, resulting in a rotation as shown in FIG. Grab one to five.

FIG. 7 (■) shows that when the head of the shaft 1lb of the moving chuck 11 contacts the release element 21 and the claw 11a is pushed down via the shaft 1lb, the stop pin 11d escapes from the hole 11e.
The pawl 11a opens and releases the sheet 5 that it was gripping, and is rotated by the twisting action of the spring 11f in the opposite direction to that when the locking element 20 was activated, returning to the state in which it is ready to grip the next sheet.

The sheet 5 fed in the form of a roll is passed through a guide roll 8 and a guide plate 9 along the sheet travel line 1 by a rewind device 7 in a supply device 6, with its speed, tension, etc. controlled by means such as a brake. At this time, the tip of the sheet 5 is first placed on the guide plate 9, and when the chain 12 is driven, the chuck 11 moves together with the horizontal bar 10, and the locking element When the tip of the sheet 5 is grasped at the position 20 and the chuck 11 pulls the sheet 5 until it reaches the position of the release element 21, the frame 14 of the sheet holding device 13 is lowered and the sheet 5 is pressed by the contact element 15. While pressing the sheet 5 against the object 1, the chuck 11 releases the tip of the sheet 5.

At this time, the cutting device works simultaneously to cut the sheet 5 to the required cutting length A, and the bonding device 18 works and the sheet 5 is bent at the four corners of the object 1 by the heating plate 19 to form a fused portion 5C. It contracts and is fixed to the covered surface of the object 1.

Subsequently, the bonding device is retracted and the framework 14 is raised to become ready for supplying the next sheet.

Since the horizontal bars 10 are arranged on the chain 12 at the same pitch as the required cutting length A, when the chuck 11 that grips the tip of the sheet 5 reaches the position of the release element 21, the next chuck 11 grabs Seat 5.

Therefore, as soon as the sheet 5 is cut off by length A and the work of covering the object 1 is completed, the next supply can be started, so there is no time loss and the apparatus can be operated continuously.

The covering device according to the present invention is not limited to application to heat-shrinkable plastic for pallet transportation as described above, but can also be used to automatically cover a flat object with a sheet cap for purposes such as keeping dust away. You can also do that.

In addition, if the adhesive device is replaced with one that also uses an adhesive coating device, it is possible to cover objects with various sheets such as paper and cloth, which is widely used in the field of packaging logistics systems for mechanization and improving packaging forms. It is something that contributes.

[Brief explanation of drawings]

Fig. 1 shows a pallet cargo packaging form using heat-shrinkable film. FIG. 3 is a perspective view showing an embodiment of the pallet and plate covered with sheets in the device according to the present invention, and FIG. 4 is a diagram showing the implementation of the device according to the present invention. FIG. 5 is a side layout diagram functionally showing the example; FIG. 5 is a plan view showing the arrangement relationship between the object to be covered, the sheet holding device and the adhesive device; and FIG. 6 is a chuck used in the device according to the present invention. A vertical cross-sectional view showing an example of
FIG. 7 explains the same operation as above, where ■ is a plan view showing the locking process, and ■ is a longitudinal sectional view showing the releasing process. 1...object, 2...cargo, 3...
... Bag-shaped film, 4... Film holding part,
5... Sheet, 6... Sheet feeding device, 7... Rewinding device, 8... Guide roll, 9... Guide plate , 10...horizontal bar, 1
1... Chuck, 12... Chain, 13.
...Sheet holding device, 14...Framework, 1
5... Contact element, 16... Cutting device, 1
7...Electric resistance wire, 18...Adhesive device, 19...Heating plate, 20...Lock element,
21...Release member, A...Required cutting length of tool, ■...Travel line, P 1 7 P 2
・・・・・・A point on the running line.

Claims (1)

[Claims] 1. A sheet feeding device 6 for a sheet covering a plate-like object;
A horizontal bar 10 that is movable along the running line of the sheet supplied onto the coating surface of a plate-shaped object, and a pair of chucks 11 that can be opened and closed, provided at both ends of the horizontal bar 100 in correspondence with the running width of the sheet. , a sheet holding device 13 that moves toward and away from the coated surface of the plate-like object, and operates corresponding to a position where a folded adhesive part is formed in the sheet at least in a part of the outer edge of the coated surface of the plate-like object. a sheet adhesion device 18 provided to
A sheet cutting device 16 is provided to traverse the sheet after the sheet feeding device 6 on the sheet running line, and a sheet cutting device 16 is provided to cut the sheet across the sheet when the chuck 11 moves.
The locking element 20 is disposed before the cutting device 16 on the sheet travel line, and the release element 21 is disposed after the locking element 20 on the sheet travel line. A coating device for a plate-shaped object, characterized in that the coating device is arranged at a distance corresponding to a required cutting length. 2 The sheet feeding device 6 is connected to the rewinding device 1 for the rolled sheet.
, a guide roll 8 provided at the subsequent stage, and the guide roll 8
2. The coating device for a plate-shaped object according to claim 1, further comprising a guide plate 9 provided tangentially to the body of the plate-shaped object at a later stage. 3. The sheet holding device 13 includes a framework 14 that moves up and down, and a plurality of elastic contactors 15 attached to the framework 14.
A coating device for a plate-shaped object according to claim 1, comprising: a sheet cutting device 16 and a bonding device 18. 4. The coating device for a plate-shaped object according to claim 1, wherein the horizontal bars 10 are arranged in a plurality of driveable endless chains 12 at equal pitches equal to the required cutting length of the sheet. 5. The coating device for a plate-shaped object according to claim 1, wherein the cutting device 16 and the bonding device 18 are of an electric resistance heating type.