JPH0523450Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) The present invention is applicable to relatively large plate-shaped rectangular parallelepiped objects (for example, those made by laminating many layers of various types of cardboard).
This invention relates to a novel wrapping paper double-sided folding device that is installed at the end portion of a packaging device for packaging.

(Prior art) When packaging objects in the shape of a rectangular parallelepiped, the front and back pieces of wrapping paper on which the objects are piled up are folded onto the top surface of the object, and at the same time, the left and right sides are folded to form adhesive tape, etc. A device that attaches the package to the body and then folds the left and right protruding ears onto the top surface of the packaged item is mainly used. Patent application filed in 1986 by the inventor of this invention
In the apparatus proposed in No. 188221 (filed on August 11, 1988), packaging is generally performed using such a system. Three types of folding pieces are sequentially arranged in a fixed state at the end of the device, and as the object to be packaged is pushed, the action of these folding pieces causes the upper protruding paper piece and the lower protruding paper piece to be folded. A folding member is disposed on the top surface of the packaged article to collect and fold back the protruding paper pieces at the end of the sequential folding process.

(Problem to be solved by the invention) However, since the above-mentioned folding is performed by an action counteracting the pushing force of various folding pieces accompanying the pushing of the packaged object, the front side of the packaged object, that is, the pushing direction On the side, the wrapping paper is folded correctly, but on the back side, wrinkles and curls tend to occur due to the frictional resistance of the wrapping paper, which has the problem of significantly deteriorating the appearance of the packaged product. Was.

The present invention has been developed in view of the above, and is intended to provide a novel wrapping paper double-sided folding device for a packaging device, which can fold back the right and left protruding edges in a correct manner.

(Means for Solving the Problems) The configuration of the present invention for achieving the above object will be explained based on the attached embodiment drawings. Fig. 1 is a partially cutaway perspective view showing an embodiment of the device of the present invention, Figs. 2 to 4 are longitudinal cross-sectional views showing the operating state of the device, and Fig. 5 is a packaging machine in which the device is adopted. An overall vertical sectional view showing an example, FIG. 6 is an enlarged perspective view of the line part in FIG. 5,
FIG. 7 is an enlarged perspective view of the same line portion. That is, in the present invention, the front and back paper pieces B ₁ and B ₂ are folded onto the top surface of the packaged object A, and the both sides B ₃ and B ₄ of the wrapping paper B are wrapped in the wrapping process in which both side parts are edge-folded. A wrapping paper binaural folding device 1 for folding over the top surface of an object A, in which the device 1 moves up and down along the left and right sides of the object to be wrapped A while it is stationary, and has upper and lower protrusions projecting left and right. both ears
A vertical folding plate 2 that folds B ₃ and B ₄ into an upright state, and a cross section that reciprocates left and right to fold both ears B ₃ and B ₄ in the upright state onto the top surface of the packaged object A from both left and right sides. It consists of a folding member 3 having a substantially inverted L shape, and the gist is that the left and right reciprocating drive of the folding member 3 and the vertical movement of the folding plate 2 are linked via a cam mechanism 4.

The device 1 of the present invention is disposed at the end of a packaging device C as _{shown in} FIG. The upper and lower ears B ₃ and B ₄ that protrude to the left and right of the packaged object A, which has been pushed with its left and right sides folded, are now to be folded onto the top surface of the packaged object A. . The rear end portion of the folding member 3 is obliquely inclined, and when the upper and lower ear portions B ₃ and B ₄ approach this portion, the rear end portion rises up.

(Function) In the wrapping paper folding device 1 having the above structure, when the folding plate 2 is located upward and the folding member 3 is at the starting position as shown in FIG. They are being pushed away. Then, the object to be packaged A stops here, and then, as shown in Fig. 3, the folding plate 2 descends along the side of the object to be packaged A, and folds the upper ear part B ₃ into the side of the object to be packaged A. At the same time, both ear portions B ₃ and B ₄ are slightly erected. Thereafter, as shown in FIG. 4, the folding plate 2 rises and the folding member 3 moves forward, forming an L-shape and forcing the above-mentioned upright ears B ₃ and B ₄ to face the upper surface of the packaged object A. Turn around. At the same time, the tape pasting device 5 shown in the embodiment described later operates, and the both ear portions B ₃ ,
Seal the ends of B ₄ to complete the packaging. Folding plate 2
The vertical movement of the folding member 3 and the left and right reciprocating drive of the folding member 3 are performed in conjunction with each other via the cam mechanism 4, and the wrapping paper edges B ₃ and B ₄ of the object to be packaged A, which are being sequentially pushed, are moved by repeating the above operations. Fold back sequentially.

(Example) Hereinafter, the present invention will be explained in further detail with reference to Examples. In FIGS. 1 to 4, a motor 41 is disposed on the top surface of a frame 40, and the drive shaft of the motor 41 is movable left and right (direction perpendicular to the body axis of the packaging machine stand, which will be described later). A pinion gear 411 that meshes with the rack 42 is fixedly provided. The rack 42 is perpendicular to the rack 42 (parallel to the body axis).
A horizontal sliding member 43 is fixedly installed, and the sliding member 43
can be slid left and right by slide rods 431, 431, and a cam plate 44 parallel to the rack 42 is fixed to the lower surface thereof. The cam plate 4
4 has a cam hole 440 that continuously includes an inclined cam surface 441, a horizontal cam surface 442, and a stepped cam surface 443.
has been established. Furthermore, a folding member mounting base plate 30 is suspended from both ends of the sliding member 43 so as to be movable up and down via slide rods 301, 301 and parallel to the sliding member 43. The base plate 30
The lower end is bent toward the inside of the machine base, and an inverted L-shaped angled folding member 3 is attached to the inside of this bent vertical piece 302 using a long hole 303 and a screw 304 so that its vertical position can be adjusted. The bent vertical piece 3
The rear end of 02 has a slope 3 that gently slopes backwards.
05, and the rear end portion of the horizontal upper plate 31 of the folding member 3 also has an oblique cross section 311 so as to be continuous therewith. The upper and lower ear portions B ₃ and B ₄ protruding from the side of the packaged object A that has been pushed as described above are pushed up by the inclined surface 305 and further bent by the inclined section 311 of the horizontal upper plate 31. Proceed along the edges. Note that the folding member 3 is connected to the slide rod 30.
1,301, it is said that it is possible to move up and down,
This is designed to follow when the conveyance table 10 of the packaging device, which will be described later, moves up and down, and is not involved in its original function.

Additionally, a support plate 21 is suspended from one end of the frame 40 (near the side of the machine base), and a swing arm that is swingable in a vertical plane via a pivot 22 is attached to the lower end of the support plate 21. 23 is pivotally mounted. A roller 24 that rolls on cam surfaces 441, 442, 443 in the cam hole 440 is disposed in the middle of the swing arm 23.
is installed, and the roller 24 and the cam surfaces 441, 44
2,443 constitute the cam mechanism 4. That is, as the rack 42 is driven, the cam plate 4
4, the roller 24 moves to the cam surface 44.
1,442,443 relative to each other, and as a result, the arm 23 swings up and down using the pivot 22 as a fulcrum. On the other hand, a vertical folding plate 2 is attached to the frame 40 near the center of the machine via vertical slide rods 25, 25 so as to be movable up and down. A slit 26 is provided approximately in the center of the folding plate 2 to allow the arm 23 to move up and down, and a roller 27 is installed at the upper edge of the slit 26. It is carried on the upper surface. As a result, when the arm 23 swings up and down due to the action of the cam mechanism 4 as described above, the roller 27
The folding plate 2 moves up and down along the slide rods 25, 25 while being supported on the arm 23.

In FIG. 2, the object to be packaged A is stationary between left and right folding members (one not shown) 3, and in this case, the folding members 3 are at the starting position, that is, near the side of the machine base.
The roller 24 abuts above the inclined cam surface 441, and as a result, the tip of the arm 23 faces upward, and the folding plate 2 is positioned upward. From this state, when the motor 41 is driven and the rack 42 is moved toward the center of the machine, the roller 24 relatively rolls on the inclined cam surface 441 and reaches the horizontal cam surface 442, as shown in FIG.
As a result, the folding plate 2 descends and folds the protruding ear portion _B3 in the upright state into the side portion of the article A to be packaged as described above. At the time of this folding, the folding member 3 has started to move forward, and the upper plate 31 further raises the ears B ₃ and B ₄ . The cam plate 44 continues to move forward, and the roller 2
4 rolls on the horizontal cam surface 442, the above-mentioned folding becomes deep and the rising becomes more noticeable,
When the roller 24 eventually reaches the step-like cam surface 443, the arm 23 rapidly swings upward, the folding plate 2 moves upward, and the folding member 3 moves both ears in the upright state.
Fold B ₃ and B ₄ onto the top surface of the packaged item A. After that, the motor 41 reverses, and the folding plate 2 and the folding member 3 move into the second position.
Return to the original position shown in the figure and wait for the next turnaround.

FIG. 5 shows a packaging apparatus in which the above-mentioned apparatus 1 is installed, and shows a supply table 6 on which a substantially rectangular parallelepiped article A is placed horizontally, and a supply table 6 on which the article A to be packaged is placed on the supply table 6. Wrapping paper vertical holding means 7 that waits wrapping paper B one by one in a vertical state on the front end side, and a wrapping paper vertical holding means 7 that holds the wrapping paper B together with the wrapping paper B, which is forcibly pushed into the wrapping paper B while being in contact with the wrapping paper B in the vertical state. While holding and transporting the front paper piece B ₁ of wrapping paper B to the front,
A first reciprocating finger means 8 that folds upward and backward and edges-folds both sides; a vertically elevating conveyance table 10 that receives the transported article A; and a wrapping paper B placed on the lowered conveyance table 10. It is comprised of a second reciprocating finger means 9 for folding the rear paper piece _B2 forward and edge-folding both sides. The wrapping paper binaural folding devices 1 are disposed in pairs at the end portions of the conveyor table 10, one on the left and one on the left.

A plurality of packaged items A are stacked on the supply table 6, and are sequentially fed in a horizontal state starting from the topmost packaged item A. Thereafter, the lifting device 61 is activated in response to a signal from a level detector (not shown), and the supply table 6 is raised to a position where the next packaged object A can be supplied.

The wrapping paper vertical holding means 7 includes a frame 71 constructed on both sides of the machine base adjacent to the packaged object A on the supply stage 6, and a hanging frame 71 with one end fixed above the frame 71. A chain 72, a gear sprocket 73 that drives a motor (not shown) by winding the chain 72 halfway, a weight bar 74 held between the sprocket 73 and the fixing point, and the other end of the chain 72. The suction means 75 is suspended from the suction means 75. The weight bar 74 and the suction means 75 are installed between the frames 71 on both sides, and are movable up and down in opposite directions along vertical guide rails (both not shown) attached to the frame 71, respectively. As shown in FIG. 6, the suction means 75 includes left and right mounting base plates 76, and a plurality of suction ports 771 installed between them.
It consists of a hollow rectangular suction tube 77 with . Both ends of the suction tube 77 are swingably supported on the mounting base plate 76 via eccentrically positioned support shafts 772, and pins 7 are provided at both ends of the suction tube 77 apart from the support shafts 772.
73 is highlighted. The pin 773 is slidably inserted into an arcuate groove 761 formed in the mounting base plate 76 on both sides at an angle of approximately 45° with the support shaft 772 as the center of curvature, and its end is connected to the other end of the chain 72. is fixed to. When the mounting base plate 76 is in a suspended state as shown in FIG.
contacts one end of the arcuate groove 761, and the suction tube 77 stands still at an inclination angle of approximately 45° with the suction ports 771 facing diagonally downward. As the sprocket 73 rotates, the mounting base plate 76 descends, and the suction tube 77 rides on the top surface of the rear end of the wrapping paper B stacked on the wrapping paper stock stand 100 (to be described later), and the chain 72
As the pin 773 loosens, the pin 773 slides relative to the arcuate groove 761, causing the suction tube 77 to fall down, and the opening side of the suction port 771 matches the wrapping paper B. As a result, the end of the wrapping paper B becomes the suction port 771... It's more absorbing. If the sprocket 73 is rotated in the opposite direction and the mounting base plate 76 is raised, the wrapping paper B is held in a vertical standby state as shown in FIG.

Below the machine stand, that is, almost directly below the conveyance table 10, the above-mentioned wrapping paper stock stand 100 is placed on the side of the car 101...
The wrapping paper is stored in a manner that it can be put in and taken out freely, and the wrapping paper B is sequentially fed out into a vertical standby state starting from the top wrapping paper B.

The first finger means 8 includes a horizontal finger plate 81 on the top surface, a bottom plate 82 and a vertical push plate 8 on the front end.
3 is assembled into a substantially U-shaped frame that is open at the rear, and fingers 84 for edge folding are fixedly installed on both sides of the inside. On the upper surface of the finger plate 81, there is a cylinder (for example, an air-driven type) that is driven to expand and contract up and down.
85 is disposed, and its rod 851 passes through the finger plate 81 and its lower end protrudes from the lower surface of the finger plate 81. The finger means 8 can be driven back and forth through sliding plates 86 fixed to both sides. As shown in FIG. 7, the sliding plate 86 is capable of sliding back and forth along slide rods 861, 861, and is fixed in the middle of an endless chain 863 that is driven back and forth by a motor 862. This causes the finger means 8 to reciprocate back and forth along the slide rods 861, 861. The limit switch 8 is on the finger plate 81.
11 is attached, and when the object to be packaged A is forcibly pushed into the U-shaped space of the finger means 8 together with the wrapping paper B, the limit switch 811 is activated, and then upon receiving this signal, the cylinder 85 is activated, The lower end of the rod 851 and the bottom plate 82
The front part of the paper is held together with the wrapping paper B. During the above-mentioned pushing, the wrapping paper B is pulled and released from the suction and holding by the suction tube 77, and the front paper piece _B1 is folded upwardly and backwardly by the action of the finger plate 81, and at the same time, The pieces of paper protruding left and right are also edge-folded by the fingers 84 at the same time. The wrapping paper B is removed by suction by the pulling action that accompanies the above-mentioned pushing, but if the suction tube 77 stands still obliquely as described above, there is less resistance and the removal is facilitated.

The second finger means 9 consists of a finger plate 91 on the upper surface and fingers 92 on both left and right sides of the lower part thereof, and is arranged in a vertically stacked relationship with the first finger means 8 as shown in FIG. 5 at the start of packaging. Ru. The finger means 9 has sliding plates 93 on both sides.
Similarly to the above, the sliding plate 93 is held by a sliding rod (not shown) installed in the front and rear so as to be slidable back and forth, and is fixed in the middle of a chain 95 that is endlessly driven by a motor 94. By driving this chain 95, the finger means 9 is reciprocated back and forth. Thus, when the first finger means 8 moves forward, the rear paper piece of the wrapping paper B
_B2 comes to cover the upper surface of the finger plate 91, and when the conveyance table 10 descends with the object A placed thereon, it covers the front surface of the finger means 9. Next, with the start of forward movement of the finger means 9,
The finger plate 91 moves along the rear upper surface of the object to be packaged A, and at this time, the rear paper piece _B2 is transferred to the finger plate 9.
1 is folded forward, and the left and right protruding pieces of paper are edge-folded by the fingers 92.

The conveyance table 10 can be moved up and down by a lifting means 10a, and as shown in FIG.
It has a length extending from the front end of the stop position of the finger means 9 to the end of the disposed position of the binaural folding device 1. Therefore, when the second finger means 9 moves forward, a gap is created between the conveyance table 10 and the packaged object A on the supply table 6, and during this time, the suction of the vertical holding means 7 is caused during formation. The pipe 77 etc. moves up and down.

A first tape pasting device 51 and a rotating body 51 for wrapping wrapping paper are disposed above the rear portion of the conveyance table 10. The tape applying device 51 is preferably the device proposed in Japanese Patent Application No. 123245/1983 (filed on May 20, 1986) by the present inventor, and the pasting direction is set in the direction of travel of the packaged object. They are arranged orthogonally. Further, the torso tensioning rotating body 52 has a rotating support shaft 5.
21, and a plurality of rubber wings 522 radially fixed to the support shaft 521. The tape pasting device 51 and the rotary body 52 descend after the front and rear paper pieces B ₁ and B ₂ are folded, and the rotor 52 rotates as shown by arrow a, so that the blades 522 are pressed against the surface of the front paper piece B ₁ . While rotating, the piece of paper _B1 is tightened backward by the frictional resistance. Thereafter, the tape applicator 51 is operated to seal the end of the rear paper piece _B2 .

To briefly describe the operation of the above-mentioned packaging device, first, as shown in FIG. , from this state, when the packaged item A is brought into contact with the wrapping paper B and forcefully pushed in manually, the packaged item A
The front side of the first finger means 8 together with the wrapping paper B
sandwiched between. At this time, the wrapping paper B is released from the vertically held state, and the front paper piece _B1 is folded backward over the packaged object A, and the protruding paper pieces on both left and right sides are edge-folded.

Next, the finger means 8 moves forward and transfers the article to be packaged A together with the wrapping paper B onto the conveyor table 10. Thereafter, the finger means 8 releases the grip and moves further forward, and after the conveyance table 10 descends, the second finger means 9 starts forward movement, and moves the rear paper piece B ₂ of the wrapping paper B onto the object A to be packaged. Fold it forward and fold the protruding paper pieces on the left and right edges in the same way as above. During this time, the wrapping paper vertical holding means 7 operates to hold the wrapping paper B.
is placed in a vertical standby state, and then the first and second finger means 8, 9 move back and return to the position shown in FIG.
The next packaged item A is subsequently packaged in the above manner.

During this subsequent packaging, when the first finger means 8 starts to move forward as described above, the packaged object A (indicated by the dashed line) on the conveyor table 10 on which the wrapping paper B has already been folded is pushed forward. The binaural folding device 1 is reached. Here, the edge-folded left and right protruding tabs are folded back onto the top surface of the packaged object A as described above, and the second taping device 5 installed on the frame 40 of the folding device 1 is lowered and the ends thereof is sealed and packaging is completed. The tape applicator 5 is preferably the one in the previous application by the present inventor as described above, and is moved up and down along vertical slide rods 501, 501 by a motor 50 installed on the frame 41, and is moved in the pasting direction. coincide with the traveling direction of the packaged object A, and are arranged in pairs on the left and right.

The packages that have been packaged in this way are sequentially discharged from the end of the conveyor table 10. On the end side of the conveyor table 10, there is a vertically movable product stock table (similar to the above-mentioned supply table 6). (not shown) is arranged, and each time a package is discharged, a level detector (not shown) is activated to lower it step by step, and the product packages are successively stacked on the stock table.

In the above embodiment, the wrapping paper stock stand 100
We have shown an example in which the machine is placed at the bottom of the machine and the wrapping paper is pulled up to hold it in a vertical standby state. It is also possible to hold it in a vertical standby state. It goes without saying that other changes may be made without departing from the scope of the present invention.

(Effect of the invention) As described above, in the wrapping paper double-edge folding device in the packaging apparatus of the present invention, when the packaged object is in a stationary state during the packaging process, the folding plate descends and raises the wrapping paper on both edges. After the folding member is in an inverted L shape in cross section, the folding member having an inverted L-shaped cross section is folded back to the upper surface of the packaged item, so that the frictional resistance caused by the rubbing between the folding member and the wrapping paper is reduced. There is no crease, and both ears are folded back correctly without wrinkles or curls.
Discharge of packaged products with a constant packaging condition is reliably guaranteed. As described above, the practical benefits of the present invention are extremely large.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway perspective view showing an embodiment of the device of the present invention, Figs. 2 to 4 are longitudinal cross-sectional views showing the operating state of the device, and Fig. 5 is a packaging machine in which the device is adopted. FIG. 6 is an enlarged perspective view of the line in FIG. 5, and FIG. 7 is an enlarged perspective view of the same line. Explanation of symbols, 1...Wrapping paper binaural folding device, 2...
...Folding plate, 3...Folding member, 4...Cam mechanism, A
... Item to be packaged, B... Wrapping paper, B ₁ , B ₂ ... Front and rear paper pieces, B ₃ , B ₄ ... Upper and lower ear portions.

Claims (1)

[Scope of utility model registration request] The front and back paper pieces B ₁ and B ₂ are folded onto the top surface of the packaged item A, and both sides B ₃ and B ₄ of the wrapping paper B are folded onto the top surface of the packaged item A during the packaging process. A wrapping paper binaural folding device 1 for returning wrapping paper, the device 1
However, the upper and lower protruding ear portions B ₃ move up and down along the left and right sides of the packaged object A at rest, and protrude left and right.
A vertical folding plate 2 that folds B ₄ into an upright state, and a substantially inverted cross section L that reciprocates left and right to fold both ears B ₃ and B ₄ in the upright state onto the top surface of the packaged item A from both left and right sides. A wrapping paper double edge in a packaging apparatus characterized in that the left and right reciprocating drive of the folding member 3 and the vertical movement of the folding plate 2 are linked via a cam mechanism 4. Folding device.