JPS63281925A - Method and apparatus for bundling resin molded product - Google Patents

Abstract

PURPOSE:To bundle even a soft foamed styrol product without imparting damage thereto, by introducing two strip like plastic films in an overlapped state on the bottom surface side of a product to fuse the same at upper and lower places and discharging the product by the strip like plastic films. CONSTITUTION:A product (w) formed into a set by bundling molded products is placed on a stand 1a. Two strip like plastic films (a), (b) are passed over a front feed roller 13 in an overlapped state and the upper strip like plastic film (b) is allowed to upwardly run to be passed around a film supporter 40b while the lower strip like plastic film (a) is passed around a rear feed roller 14 and subsequently allowed to upwardly run to be pass around a film supporter 40a. The rollers 42 of the film supporters 40a, 40b continuously move in integral relation to bars 35, 36 and, when said rollers are revolved up to the bottom surface side of the product (w), the strip like plastic films (a), (b) are passed around the product (w) while stretched from the upper surface thereof to both front rear surfaces thereof. A fusing electric heating wire 65 is brought into contact with the strip like plastic films (a), (b) to fuse the same and welds the films at upper and lower places of the fused part.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention provides a method and apparatus for binding resin molded products, particularly products molded using a styrofoam molding machine, that can be immediately bundled and shipped at the molding site. It is related to.

(Prior Art) Conventionally, in a styrofoam molding factory, in order to ship a molded product, the molded product is packed in a corrugated cardboard box, and then the corrugated cardboard box is tied using a string binding machine.

(Problems to be Solved by the Invention) However, since the Styrofoam molded products are packed in a cardboard box and then bundled, there is a problem in that shipping takes a considerable amount of time.

In order to eliminate this problem, the Styrofoam molded products can be tied directly without storing them in a cardboard box, but when Styrofoam molded products are bound using a conventional string tying machine, the ridges of the products are bound by the binding force of the string. This can lead to deformation and damage, reducing the product value. For this reason, if the string is made into a flat shape, the deformation and damage of the product will be reduced, but the sealing operation after the binding is completed requires manual labor, which has been an obstacle to automation.

On the other hand, with recent technological advances in styrofoam molding machines,
As the amount of water adhering to the surface of molded products has become extremely low, there are an increasing number of cases in which products are shipped online from the molding site without the drying process after molding.

Therefore, there has been an increasing demand for an easy-to-use automatic binding machine that allows molding workers to bundle and package the products ejected from the molding machine at the molding site between molding operations.

The present invention was made in response to such a demand, and allows even styrofoam products with soft surfaces and high magnification (50 to 60 times) to be bundled without damaging the products during the binding process. The purpose of the present invention is to provide a method and device for bundling resin molded products that can be shipped online.

(Means for Solving the Problems) In order to achieve the above object, a method for bundling resin molded products according to the first invention is as follows: plastic film (a)
(b) is introduced to the bottom side of product -), one band-shaped plastic film (a) is stretched from the front side of product k) to the top side, and the other band-shaped plastic film (b) is placed on the back side of product -). The process of surrounding the product with the band-shaped plastic films (a) and (b) by stretching them from the top side to the top side, and the process of surrounding the product with the band-shaped plastic films (a) and (b) by wrapping both the band-shaped plastic films (a) and (b) on the bottom side of the product 6#) A process of welding the products at the lower welding locations and separating the upper and lower welding locations to bundle the products (←); After bundling, both strips of plastic film (a) and (b) are separated while being connected to each other at the lower welding locations.
) from the front side of the product ←) to the upper rear of the product ←).
) and discharging the two strip-shaped plastic films to the rear by (b) separating them to create a surrounding space for the next product (-).

Further, a binding device for resin molded products according to a second invention is a device for carrying out the method according to the first invention, in which two strips of plastic films (a) and (b) are stacked one on top of the other. A band-shaped plastic film supplying means (A) that feeds out to the bottom side of the plastic film (A), and a set of two arms (33 ) (34) and these arms (33) (34) are rotated in opposite directions to attach the strip-shaped plastic film (a) (b) to the product←).
) is wound around the plastic film (al (
An arm drive means (C) for deploying b), and a belt-shaped plastic film (a) wrapped around the product (b).
) Attach the product (1) to the inner side of the arms (33) and (34).
v) is characterized by comprising a heat sealing means (D) for welding the upper and lower two locations along the bottom surface of the base plate and for cutting the upper and lower welded locations by melting.

(Function) When the products to be packaged in one package are placed on the product rack and the device is activated by an appropriate means such as a foot switch, one arm (33) rotates clockwise and the other arm (34) rotates clockwise. ) is rotated counterclockwise to tension the plastic film strips (a) and (b) while binding the products ←).

When both arms (33) (34) reach the specified position on the bottom side of A6N1), the belt-shaped plastic film (a) ( Top and bottom 2 near the end of the bundle in b)
At the same time as welding the welded parts, the welded parts are cut by melting, and the belt-shaped plastic film (a) (b) that is cut on the product side completely binds the product (W) by its shrinkage force, while the other part that has been cut off The strip-shaped plastic film (a) (b) connected at the welded part has both arms (33) (
34).

Next, when both arms (33) and (34) are rotated clockwise, the product (W) is ejected backward by the strip-shaped plastic film (a) held by the arm (33) and further rotates and reaches the original position, and the space between both band-shaped plastic films (a) and (b) is expanded to form a surrounding space for the next product (W).

(Example) Next, an example of the present invention will be explained with reference to the drawings.
In Figures 3 to 3, (1) is the base of the entire apparatus, in which the film supply means (A) is disposed on the front side of the product binding section (B) having the product stand (1a), and the product binding section CB. )
An arm drive means (C) is arranged on the side of
This is provided.

The film supply means (A) has two sets of front and rear support shafts (3) (3) installed and fixed at the upper and lower parts of the frame (2), and a plurality of support shafts (3) (3) are installed between these pairs of support shafts (3) (3). Frame board f41
(4), (5) Both ends of (5) are slidably attached so that they can be set at any position in the length direction of the support shaft (31+3>), and frame plates (4) (4), +5 ) Reel shaft support part (4a) recessed in the upper surface of the center part of (5) (4a
), (5a) A reel (6) in which upper and lower pairs of strip-shaped plastic films (a) and Cb) are wound and layered on (5a), respectively.
6), (7) (7)... are formed by supporting their central axes rotatably.

(8) (8) and (9) +9) are brake devices rotatably supported at appropriate positions on the frame (2), and the lower surface is connected to the reels (6) (6), (7) (7). It is brought into pressure contact with the wound plastic film strips (a) and (b) to provide appropriate resistance to the unwinding of the plastic film strips (a) and (b).

Note that the belt-shaped plastic films (a) and (b) are stretchable in the length direction.

The strip-shaped plastic films (a) and (b) are unwound from the upper and lower sets of reels (6) (7), (6) (7) of the film supplying means (A) configured in this way and are stacked downward in two layers. The pedestal (1a) is pulled out and runs across a plurality of fixed tensile rollers αφ disposed on the base (1) and a load roller 2 which is biased downward by a weight lever αυ. The films run in an overlapping state up to the film feed roller α1 disposed at the lower front.

This type of upper and lower reel (6) (?) is a product←
) are disposed on the frame (2) according to the number of strip-shaped plastic films required to bind them at appropriate width intervals.

An arm driving means (C) and a heat sealing means (D) are arranged in the binding part (B), and the respective structures will be described next.

[Arm driving means]

Place the front and rear brackets (20) (2
1) upright, and a bearing (22) (2
2), a horizontal shaft (23) supported by
), a small-diameter shaft head (24) and a large-diameter shaft head (25) are independently rotatably pivotally mounted.

Sprocket wheels (26) (27) are integrally fixed to these shaft heads (24) (25), respectively, and the sprocket wheels (26) (27) are connected to motors (
28) It is connected by a chain (32) to the sprocket wheels (30) and (31) fixed to the drive shaft of (29). Since the motors (28) and (29) use the same type of AC induction motor, they can freely rotate in forward and reverse directions, and their rotational angular speeds are equal.

Further, the small diameter shaft head (24) has a short arm (33),
Long arms (34) are fixed to each of the large diameter shaft heads (25), and the tips of these arms (33) (34) protrude forward at right angles to the arms (33) (34). A short horizontal bar (35) and a long horizontal bar (36) are fixed respectively.

Therefore, these bars (35) (36)
) can be rotated around the outer circumference of the product ←) in either clockwise or counterclockwise directions.

Furthermore, these bars (35) (36) contain the product-
) band-shaped plastic film to bind (a) (b)
The same number of film supporters (40) as the number of film supports (40) are mounted at predetermined positions in the length direction at equal intervals to the reels (6) +7) in accordance with the binding position of the products ←).

As shown in FIG. 5, this film supporter (40) includes a front and rear set of film collars (41) (41) that are loosely fitted into a bar (35) or (36), and these film collars (41) ( hole (41) bored at the inner end of the hole (41)
1a) A roller (42) rotatably supported between the rollers (42) and film collars (41) are arranged on the outer surface side of the film collars (41) (41) so as to sandwich the film collars (41) (41), and a butterfly Bar (35) or (36) with Nesuku 44)
) consists of a set collar (43) (43) fixed to the

For convenience of explanation of the action, the film supporter (40) set on the short bar (35) is designated by the symbol (40a), and the film supporter (40) set on the long bar (36) is designated by the symbol (40a).
is indicated by the symbol (40b).

As described above, how to wrap the plastic film strips (a) (Cb) up to the film supports (40a) (40b) of the arm driving means (B) configured in this way is as follows. In the case of multiple sets in b), each set has 2 parts up to the front delivery roller Q31.
They are fed out in sets. This delivery row 90 has an axial length approximately equal to the maximum medium W of the products to be bundled (b), and is rotatably supported by the base (1).

After passing the feed roller Q3, the upper strip of plastic film (b) of each set passes under the feed roller Q3, and then moves upward almost vertically to the bar (b) of the long arm (34).
Multiple film supports (4) set in
As shown in Fig. 5, it is passed through the inner surface of the roller (42) of the film collar (41) (41) and passed through the inner surface of the roller (42) of the film collar (41), as shown in Fig. 5.
After passing under the delivery roller α, the roller a) runs approximately horizontally, wraps around the rear delivery roller Q4 rotatably disposed at the rear of the pedestal (1a), and ascends approximately vertically to shorten the length. Roller (42) of multiple film supports (40a) set on bar (35) of shaped arm (33)
It passes through the inner surface and extends over a portion of the bar between the film collars (41).

In addition, limit switches (LSu + ) (LSd I), (LSuz
) (LSdz) are installed respectively as shown in FIG.

[Heat sealing means]

As shown in FIGS. 1, 6, and 7, this heat sealing means (D) has a seal right part (51) and a seal left part (51).
52).

The right part of the seal (51) is attached to the rod tip of a right cylinder (53) horizontally disposed below the base (1), and is moved forward by the returning action of the rod to form an ascending strip. The plastic film (a) is pressed forward from the bottom rear of the product (←), that is, from the right side toward the center in FIG. 1, to the left.

On the other hand, the left part of the seal (52) is attached to the rod tip of the left cylinder (54), which is horizontally arranged below the base (1), and is moved backward by the returning action of the rod, and is moved upward. The front part of the other strip-shaped plastic film (b) is pressed backward along the bottom surface of the product (-).

The seal portions (51) and (52) are attached in a number equal to the number of strips of the plastic film strips (a) and (b), respectively, to the rods of the cylinders (53) and (54) using appropriate mounting members (80).
It is mounted through one cylinder (5
3) or (54), a plurality of seal parts (51) or (52) are simultaneously interlocked.

As shown in Fig. 6, the structure of the right part of the seal (51) consists of a box-shaped frame (55) that opens in the direction of return of the iron, and inside it there is a base (56), silicone rubber (57), and a Teflon sheet (58). ) are sequentially laminated to form an upper and lower set of film covers, and a plastic film retainer (59) is placed on the film holding surface at the tip of the box frame (55).
is affixed thereto, and a cooling air nozzle (60) is opened from the bottom of the box frame (55).

The left side of the seal (52) includes a box frame (61) that is open opposite to the box frame (55) of the right side of the seal (51), a base (62) disposed inside the box frame, and a silicone rubber. (63
), a heating wire for upper and lower welding (64a) (64b), a heating wire for central part fusing (65), and a belt-shaped plastic film fusing and welding device consisting of a Teflon sheet (66), and a box frame (61). ) A plastic film retainer (67) is attached to the film-clamping surface of the tip end surface. Furthermore, the entire left part of this seal (52) moves together with the rod of the cylinder (54), but the box formwork
61) can be pressed and moved independently of the fusing and welding device by means of a cranking cylinder (68) attached to the mounting member (80). That is, the spring (69) is arranged so that only when the rod of the cracking cylinder (68) protrudes, the cutting and welding device is retracted and the box frame (61) moves relatively forward.

(70) is a clamp cylinder fixed to the base (1) below the front delivery roller Q3, and by moving the rod upward, the clamper (71) fixed to the tip of the rod is applied to the delivery roller a3. This is to press and fix the belt-shaped plastic films (a) and (b) being passed.

Next, the air system for operating each of the above cylinders will be explained based on FIG. 7.

The air source (81) includes a filter (82) and a pressure reducing valve (83).
It communicates with the left and right cylinders (53) (54) through the left and right cylinder four-way valves (84) (85),
In the figure, the rods of the left and right cylinders (53) and (54) are both in a protruding standby state.

In addition, the clamp cylinder (70), which is in communication with the outlet side of the right cylinder (53) via a branched pipe, is configured so that the rod of the left cylinder (54) returns and the heat sealer part clamps the strip-shaped plastic film ta), tb). When I did,
The air limit switch (72) is activated by an appropriate cam that works with the left side of the seal to cause it to protrude, but it has returned to normal.

The cracking cylinder (68) is normally connected to the pipe (73)
Air enters both the exit side and the return side of the cylinder via (74), and only a slight force is applied in the exit side direction, and the spring (69) is compressed so that it cannot move forward. However, the four-way valve (86) is switched and cooling air is ejected from the air nozzle (60), and the air pipe line (73) at the retreat port is opened to the atmosphere, so the cylinder (68) is The spring (69) is compressed and protruded, and as a result, the fusing and welding devices (65) (66
) is relatively set back from the box frame (67).

Next, the operation of the embodiment of the present invention configured as described above will be described.

[Start of bundling] (See Figure 4-1) First, the Styrofoam molded products to be bound, e.g.
A product eW), which is a set of molded products as shown in Figures (a) to (C), is rolled from the − side of the base (1) so that the product ←) is in front of the operator. Place it on the stand (1a). Moreover, as shown in FIGS. 2 and 3, the strip-shaped plastic film (a) is placed at a desired interval in the width direction of the product.
) Reel (e) in advance so that (b) is hung over the reel (e)
(7), (6) (7) and film supporter (40a)
Set the position (40b).

reel! 6) (7), (6) The two strips of plastic film (a) (bl) that are fed out from (7) are passed over the tension roller Ql and the load roller (Foundation) in a stacked state, and then passed through the front feed roller a. After that, the upper plastic strip film (b) and the lower plastic plastic film strip (a) are separated, and the upper plastic film strip cb> is moved upward and attached to the long bar (34) of the long arm (34).
36), the lower band-shaped plastic film (δ) is passed over the rear feed roller α as described above, and then moved upward to the rectangular arm (33).
The film supporter (40a) of the short bar (35) is stretched over the film supporter (40a) as shown in FIG. Here, as shown in FIGS. 4 and 5 (C), the film supporter (40a)
The small black dot shown next to (40b) indicates the position of roller (42).

Strip plastic film in previous cycle (a)
After fusing and welding (b), the band-shaped plastic film (a
) (b) is connected above the product ←) as shown in (90) in Figs. 1 and 4, and the limit switch (LSu+) is connected by the short bar (35). ) are each stepped on by long bars (36) to hold the strip of plastic film <8) (b) in an unfolded state.

From this state, a start signal to start bundling is input.

(Bundle) (See Figure 4-2) When the motors (26) and (27) operate, the short arm (
33) rotates downward in a clockwise direction, and the elongated arm (34) rotates downward in a counterclockwise direction. At this time, these arms (
33) Each roller (42) of the film supporter (40a) (40b) attached to the bar (35) (36) of (34) moves integrally with the bar (35) (36). , the position of bars (35) and (36) is the product←
), the strip-shaped plastic films (a) and (b) are stretched from the top of the product (1v) to both the front and back surfaces.

[Fusion, welding] (See Figure 4-3) The bars (35) and (36) are respectively connected to limit switches (LS).
When the left and right cylinders (53) and (54) are rotated to the position where you step on them, the left and right cylinders (53) and (54) begin to operate at the same time, and by returning the respective rods, the left and right seal parts (51) (
52) move horizontally while pressing the strip-shaped plastic films (a) and Cbj from the outside toward the center, and press the box-shaped frames (55) (
61) by double-striped plastic film (a) (
(b) are held together and the belt-shaped plastic films (a) and (b) are placed along the bottom surface of the product.

At this time, since air pressure is applied to the cranking cylinder (68) on both the outlet side and the return port side, the spring (
69), the box frames (55) and (61) are wrapped in strips of plastic film (aluminum).
(After gripping the bl, the spring (69) is compressed and cut by the pressing force of the left cylinder (54), and the welding heating wires (64a), (64b), and (65) are attached to the belt-shaped plastic film (a). (Move closer to bl.

First, the welding heating wire (65) contacts the band-shaped plastic films (a) and (b) to perform fusing, and then the welding heating wires (64a) and (64b) respectively touch the box frame (64b) on the opposite side. Press the strip-shaped plastic film (al (b)) that is in contact with the film cover (58) of 55) to weld the strip-shaped plastic film (a) and (b) at two locations above and below the fusion section.

During the above fusing and welding, turn off the air limit switch (7).
2) is stepped on, the clamp cylinder (70) moves forward, and the clamper (71) stops feeding out the strip-shaped plastic film (a) (b).

When the welding timer of the control circuit times up, the four-way valve (86) is switched and the pipe line (73) is opened to the atmosphere, and the heating wires (64a), (64b), (64b), (64b), and
5) retreats relative to the box form (61), cooling air is ejected from the nozzle (60) into the box forms (55) and (61) that are in close contact with each other, and the plastic film strip (a) Welding is performed quickly and reliably by cooling the welded portion in (b).

Next, the rods of the left and right cylinders (53) (54) move in the opposite direction to seal the left and right parts (51) (52).
) are spaced apart and the belt-shaped plastic film (a
) The upper welding point in (b) adheres to the bottom surface of the product←) by the restoring force of the film to bind the product (W), and the lower welding point (90) adheres to the bottom of the product ←), and the lower welding point (90) is attached to the bottom of the product
a) This is the feeding tip of (b).

From this state, the long bar (36) rotates counterclockwise in the opposite direction to the rotation direction, and the short bar (35) begins to rotate in the same clockwise direction as when it was lowered (No. 4-4). (see figure).

[Product discharge]

As mentioned above, when both bars (35) and (36) are rotated from the bottom side to the front side of the product with an appropriate distance between them, the belt-shaped plastic is moved by the rollers (42) of the long bar (36). As the film (al (b)) is pulled out, one band-shaped plastic film (a) comes into contact with the front lower edge corner of the product←) from the rear delivery roller Q4), and the other band-shaped plastic film ('b) The portion is pulled out upward from the delivery roller Q's. Then, the long bar (36) reaches its original position and stops by stepping on the limit switch (LSuz) (see Figures 4-5).

From this state, the short bar (35) continues to rotate clockwise to feed out the strip-shaped plastic film (a), and the strip-shaped plastic film (a) is stretched between the short bar (35) and the rear delivery roller. The film (a) is pressed obliquely upward against the lower edge of the front end of the product ←) according to the rotation of the short bar (35), and the product +N) is lifted up by the tension of the strip-shaped plastic film (a) while being placed on the mount (la).
), see Figure 4-6), short bar (35
) reaches its original position, the limit switch (LSu I
) to stop, the plastic film strips (a) and (b) are spread out and stretched between the long and short bars (35) (36) and the front and rear feed rollers Q1 (2), and the space surrounding the next product is stretched. This is a return to the product acceptance system that formed the division.

(Effects of the Invention) As described above, according to the present invention, two strip-shaped plastic films in an overlapping state are introduced to the bottom side of the product, and one strip-shaped plastic film is stretched from the front side to the top side of the product. After enclosing the product by stretching the other plastic plastic film strip from the rear side of the product to the top side of the product, weld the plastic plastic film strips together at two places on the bottom side of the product, and then weld the two plastic film strips together at the top and bottom of the product. are separated and the product is bundled, and then both of the separated plastic film strips are fed out from the front side of the product to the rear of the upper surface while being connected to each other at the lower welding point, and the product is discharged backward by the plastic film strip. The present invention relates to a method for binding resin molded products, which is characterized by separating both belt-shaped plastic films to provide a surrounding space for the next product, and an apparatus for carrying out this method. Without tying up items after placing them in a corrugated pole box,
It is possible to directly bind products, and since the binding is done by the tension of the plastic film strips, there is no damage to the products. Since the belt-shaped plastic film is fed out from the front side of the product to the upper rear side, the product can be automatically discharged by the belt-shaped plastic film, and
After being discharged, this belt-shaped plastic film can be used to prepare the next product for bundling, and the products can be efficiently bound one after another, making it possible to ship the products online from the molding factory.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a simplified side view, FIG. 2 is a front view of the film supply section, FIG. 3 is a partially vertical front view of the binding section seen from the rear, and FIG. -Figures 1 to 4-
Figure 7 is an explanatory diagram of the process from bundling to discharge, Figure 5 (8) is a longitudinal sectional front view of the film supporter, Figure 5 (C) is a partially enlarged sectional view, and Figure 5 (C) is the hanging of the plastic film strip. FIG. 6 is an enlarged sectional view of the heat sealing means, FIG. 7 is a diagram of the operation system of each cylinder, and FIG. 8 is a side view showing the transfer state.
Figures (a) to (C) are perspective views showing various shapes of bound products. (1)... Base, (1a)... Frame, (6) (7
)...Reel, (28) (29)...Motor, (
33) (34)... Arm, (35) (36)...
・Bar, (40a) (40b)...Film supporter, (51) (52)...Seal left and right parts, (A)
... Film supply means, CB) ... Binding part, (
C)... Arm driving means, (D)... Heat sealing means, (a) (b)... Band-shaped plastic film. Patent applicant: Toyo Machinery & Metals Co., Ltd. Same as above Toyo Koki Co., Ltd.

Claims (2)

[Claims] (1) Introduce two overlapping strips of plastic film to the bottom side of the product, wrap one strip of plastic film from the front side of the product to the top side, and place the other strip of plastic film on the rear side of the product. After surrounding the product by stretching it from the top side,
On the bottom side of the product, both strip-shaped plastic films are welded at two locations, upper and lower, and the upper and lower welded locations are separated and the product is bundled.Then, both strip-shaped plastic films that are separated while connected to each other at the lower welded location are assembled into a product. Binding of resin molded products, characterized in that the product is discharged rearward by the belt-shaped plastic film by being fed out from the front side to the rear of the upper surface, and at the same time, both the belt-shaped plastic films are spaced apart to provide a surrounding space for the next product. Method. (2) A belt-shaped plastic film supply means that feeds out two strip-shaped plastic films in an overlapping state to the bottom side of the product, and a set of two strip-shaped plastic films that hold each of these strip-shaped plastic films and rotate around the outer periphery of the product. and an arm that rotates these arms in opposite directions to wrap a plastic film strip around a product, and after wrapping, rotates them in the same direction to eject the product and unfold the plastic film strip. It is characterized by comprising a driving means, and a heat sealing means for welding the band-shaped plastic film wrapped around the product at two locations, upper and lower, along the bottom surface of the product on the inner side of the arm, and fusing and cutting the upper and lower welded locations. Binding device for resin molded products.