JPH01267106A - Packer for a plurality of kinds of film having variable extensibility - Google Patents

Abstract

PURPOSE:To securely envelop a film around a packed article even if it is replaced by a less extensible one, by making it possible to regulate the inclination of chains provided to transfer the film according to the kinds of film and by making it possible to make narrow independently the distance between the both chain bottoms. CONSTITUTION:Two screw bars 34, 35 are supported rotationally under the front and rear ends of a pair of sheet plates 38 bearing an endless chains 49 at a slant, which has many clamps in the both sides of a feed conveyor 41 transferring packed articles. The both screw bars are connected to each other by an endless string for an interlocked movement. Right-handed screws 36 formed on the both screw bars are fitted to the holes of sheet plates in one side thereof and also left-handed screws 37 are fitted likewise in the other side thereof respectively to regulate the full length of the sheet plates by manipulation of the screw bar. On the other hand, a cutting apparatus is provided to cut junctions of the screw bar and the string. Said both screw bars are constituted to independently operate the apparatus by the manipulation thereof.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention involves covering an object to be packaged on a conveyor with a strip-shaped plastic film, and stretching the film in the lateral direction. Both side edges of the film are wrapped around the lower surface of the object to be packaged to form a cylinder, and the cylindrical film is cut between the front and rear wrapping devices tJ, and the ends of the cut film are wrapped. Packaging 1 in which the lower surface of the package is bent and the edge of the bent film is heated with a hot stone on the surface of the cylindrical film of the wrapping device.
Concerning how many.

The fluf of the action when the packaging machine wraps the packaged item
If f is explained using a drawing, it will be as shown in F.

That is, as shown in FIG. 11, first, a band-shaped film (T) is placed over a tray (^) containing the items to be packaged, and the both edges of the film ([) are stretched in both directions. fA) and wrap it around the F side of the film ([
) into a cylindrical shape. Next, cut the cylindrical film into a predetermined length, and pull both ends (F31 (F41) of the cut film toward the ground using vacuum suction as shown in Fig. 12. When the pane of film ([3) is brought into contact with the vertical C1 wall plate fil and the tray (^) is carried in the direction of the arrow, the pane of film ([3) is tensed at 1 g when it comes into contact with !WmfBl. As shown in Fig. 14, a rod-shaped roller (C1
, the other end of the film (F4) is tensioned into a tray (
The film is bent for 1 hour on the F side of A), forming a transparent product.

(Conventional technique) Conventionally, in Japanese Patent Application Laid-Open No. 183307/1983, as shown in Figs.
A horizontal line that makes f1501... at equal intervals]
On both sides of the film belt 17 (1511), one dressless film (4521 (152)) is installed so as to be tilted downward toward the transport direction of the packaged material.
1531 is supported by a large number of clamps provided on the chain 1521 (1521) and conveyed in the direction of the packaged articles (1501), and the film f1531 is transferred to each packaged article (15
01, stretch the film by pushing it up from below, and then bend both edges of the film to the underside of the packaged item and join them together.

It is disclosed that the film is made into a cylindrical shape around the object to be packaged.
If specification 4 is used, increase the inclination angle of the chain fi521 with respect to the horizontal, and in the case of heat-shrinkable foil 14, reduce the inclination of the chain since it does not have a stretching function. It can be shared with sex films.

(Problem to be solved by the invention) However, just adjusting the inclination of the chain (+52) on the instep as in the Moekiko hat is difficult to achieve with a heat-shrinkable film without elasticity.
In the case of narrow film, 1 inch (1521 of 1!
The end f1s2al may be set 6" further than the top surface of the conveyor (1511), and in such a state, both edges of the film released from the chain are placed above the bottom surface of the packaged item (1501). However, there was a drawback in that both side edges were tucked under the packaged object.

The present invention has been developed in view of the above problem, and even when the film used is changed from a stretched film to a heat-shrinkable film with poor stretchability and the inclination angle of the chain is adjusted, the rear end of the chain is It is designed so that one set of the lower surface, I, and lower side of the encapsulated object is always included.

<Means for solving the problems) [Objective 1 of the invention i, t J-]? In order to achieve this, a large number of clamps are installed on both sides of the conveyor for transporting the packaged items.A large number of clamps are installed on both sides of the conveyor, and on the underside of the front and rear walls of a pair of ledges that support the chain in an inclined manner. Two screw rods are supported rotatably, and the two threaded rods are connected by a T-strand-like string material so that they interlock. The notch screws formed in the screw holes of the plate and on both screw studs are respectively engaged with the decimal screw holes on the other side, so that the overall spacing between both decimals can be adjusted by operating the threaded rod. , is equipped with a device for cutting the connection between the threaded rod and the string-like material, and is configured so that both threaded rods can be pulled by operating at the 4IA position.

(effect) Encapsulation! On both sides of the supply conveyor that transports goods A, there are a pair of seats 1 that support the jin 1 having a large number of clamps in an inclined manner. ll,: Engaged with two arranged screw studs. Double sacrifice L! l-shaped +4-('connected with rhythm or iIT function, kneaded again-51i1; l screw dedicated both 1'4! &M means right-handed screw and left-handed screw +'6
('i L is C.

Operate the screw on the negative side with J'5+'', [・The overall spacing from the negative side seat changes to match the width of the film.

On the other hand, by releasing the connection between the threaded rod and the string-like material using the device that cuts the connection between the threaded rod and the string-like material, 1
The distance between the lower ends of the chains on both sides of the bi-inclined chain can be narrowed by 16, and a large slack can be formed in the film at this part.

This kind of adjustment is performed when extensible film is replaced with less extensible film, and by doing this, the film can be rolled around the packaged object without changing the chain inclination angle too much. I can do it.

(Example) As shown in Fig. 3, a part of the packaging machine base has a horizontal bottom plate (
13) and two walls (14) and (15) installed upright on the bottom plate form a groove, and a movable frame body (
1G) is installed. The frame (1G) has two side plates (1701B) on both sides, and these side plates (171(1)
As shown in Fig. 4, the both side plates (170181) have elongated holes (201 (21)) extending vertically at their front and rear ends, respectively. Pass the screw (231) through the elongated hole (20) +211.
(23N24) (24) on both walls (14) (I
s) to fix the frame body (16) to the machine base.

Therefore, by loosening each of the screws (23H23H24) (24), the front and rear ends of the frame (161) can be moved up and down within the length range of the elongated holes (20) (21), and the frame (1G ) can be appropriately sloped to u19.

In addition, the drive shaft C21 is fixed to the bearings (25) (2GIF1) on the inner surfaces of both side plates (17) +181 of the frame body, respectively.
), and furthermore, one end of the drive shaft (21) is connected to a hole (14) on one side of the machine base, and the drive shaft (21)
Connect one end of the chain to the chain (29) through the chain foil (28).
The chain (29) is connected to the drive shaft (27) so that power is transmitted to the drive shaft (27). , the drive shaft (271/) (the hole (50) of the lff1 (14) that passes through is long in the vertical direction (see Figure 6), so even if the end of the frame C16] is moved up and down, the drive shaft (21) There is no problem in transmitting power to the

Roughly two bearings (320321 (33H33) are provided inside each side of the front two frames, and two front and rear threaded rods (34) + 35 are rotatably supported between these six bearings. As shown in FIG.
G) and a left-hand thread (37), and a pair of long rope seat plates (38) (381) are supported in parallel between the two threaded rods. Bottom plate (13)
A belt type supply conveyor (41) is provided on a frame (40) provided through legs (3ci) on the top, and the above-mentioned double seat plates (321) (38) are arranged on both sides of the supply conveyor,
As shown in Fig. 4, the support plate (42043) hanging from the front and rear edges of the seat plate (38) is connected to the right-hand thread (36) of the threaded rod (34) (35) via the nut (44) (45). It is engaged with the left-hand thread (37).

The supply conveyor (41) is connected to the drive shaft (27) via a chain (4G), and the article to be packaged (^) is connected to the drive shaft (27) through a chain (4G).
The above-mentioned seat plates (380381) are provided so as to descend with a gentle slope toward the transport direction of the packaged items, and as shown in Figure 3, the seat plates on both sides 21M chain foils installed on the front and upper surfaces of +47) (
Endless chains (49) (491) are stretched over 481, (471 (4g), respectively, to form the left chain conveyor, and both chains (4)) (49)
The inner surface of the chain conveyor is extended outward using tension foils (50) (501) to expand the width of the middle SI section of the chain conveyor.

Roughly, there are many clamps (511 (511...) on both chains.
・are placed at equal intervals.

As shown in Figure 6, the gear boxes (
52) The first bevel toothed skewer Cs4+ts4) formed vertically downward and supported via ball bearings (53) (53) on the sides of both gearboxes is slid onto the key (5).
5) When connected to the drive shaft (21) via (55), the chain wheel (48) (4g) shaft (SGI (5(i)
) are engaged with the first bevel teeth φ(54) (50).

Therefore, the power of the drive shaft (27) is transmitted to both chain wheels +481 (48) via the bevel gear, rotating the chain (490491) shown in Figure 3. Also, as shown in Figure 4, the front and rear chain wheels (47048) are rotated. A cam (59059) is provided on each seat plate (38) on the lower side, and the clamp (51), which is normally closed by the tension of a spring (60), is attached to these cams (5g) (59).
ItTl b'l by contacting it.

Therefore, as shown in FIG. +Jm.The middle part of the chain f491+491 has been expanded in width by the chain boiler (50) (501), so the film ([)
is stretched in the lateral direction, and is shown in FIG.
9) By tilting the film (F) 1, feed the film (F) 1.
7 (411) is pressed over the packaged items (^) conveyed. And above the rear end of the chain conveyor, there is a 21
A pair of devices l supported by 4 foils (63) + 641
Belbels 165) (65) are installed in a V-shape so that the width becomes narrower as it goes forward, and as shown in Figure 7, these belts (65) (65) are attached to the shaft via gears (67). Since the rotational power is transmitted, the above-mentioned film fF)
Both side edges of the film ([
) are welded to form a film tJ.
It becomes p1-like around the wave package.

As shown in FIG. This chain foil +701 (
71) by the chain (72), and then connect the two handles f(
i81f139) when you operate either one (
12) allows the two threaded rods f34H351 to rotate together. In this way, connect two threaded rods (34
When 035+ is rotated as a unit, the left and right outer plates (381 (38) remain parallel to each other and become relatively straight due to the action of the right-handed screw (3G) formed on these screw rods) and the left-handed screw (37). Adjust the distance between the chains (49) (491), which are close to each other and relatively narrow.

When changing the width of the film ([) according to a change in the cross-sectional area of the packaged object, it becomes necessary to adjust the spacing of the chains (491f491) in this way.

As shown in Fig. 15, the chain wheel (70) is installed on one side of the threaded rod (34) in a freely rotating state, and the clutch is attached to the sliding key (74) installed on the screwed rod (34). (
75) There are 9 mirrors. When this clutch (15) and the chiding wheel (70) are engaged, the key (74)
), the engine wheel (10) is fixed to the screw stud (34), and the screw (76) is tied up to close the clutch (
15) from the chain wheel (70), the connection between the two threaded rods 134H35) will be severed, so use the handle (69) to rotate the rear tension rod (35) using the handle (69). Seat plate (381) (You can freely adjust the distance between the rear ends of 381. If you make this adjustment, the seat plate f381f381
Since the parallelism of is lost, as shown in Fig.
781 (791) and supports it rotatably, and especially the front nut (44) is attached to the guide (8) of the support plate (42).
0), and the space between the front ends of the seat plate f38N38 can be freely adjusted while maintaining the space between the front ends of the seat plate f38N38. Thus the pair FM m +381 (381 and Chien (49) +
The reason why we were able to adjust the distance between the rear ends of 491 was that stretchable film and heat-shrinkable film have different stretching rates.
In the case of heat-shrinkable film, the length of the film can be reduced by pinching the gap between the rear ends of Chin F491 (49), and on the contrary, in the case of stretchable film, the distance between the rear ends of Chin F491 (491) must be Adjust the width to fit the bottle.Also, at the same time screw (23N23H241(
2 and 11, and raise the bulge end of the frame (16) up and down, and in the case of heat-shrinkable film,
On the contrary, the stretchable film 1. Tjin (4)
9049) to a steep angle to adjust the pushing force against the packaged item to a large extent. Heat-shrinkable film stretches less than stretchable film, and will tear if a large force C is applied to the packaged item, so this kind of adjustment is necessary, and by making this kind of adjustment possible, This made it possible to share the two types of films mentioned above. Furthermore, the fifth
As shown in Figures and Figure 6, the threaded rod (
The hole +82083) through which the frame member 34N35) passes is lengthened in the vertical direction so that there is no problem in adjusting the height of the frame body (1G) in the vertical direction.

15 after the chain (49) as shown in Figures 7 and 8.
A pair of rollers (851 (851) with their lower ends as shafts (86
) is rotatably provided on the stand (13).

These rollers (851 (851 is the
Tilt so that 1 approaches the beans, and also tilt the chain (
The upper end of the [l-ra is tilted in the direction of movement of the packaged object (^) so that the inclined surface of 49) and the axis line are substantially straight. The surface of the roller (851 (85)) is smoothed, for example, by chrome plating to increase the frictional force with the film ([), so that the film (El) comes into close contact with the surface of the O-ra (85). For this reason, Chien (49)
At the moment when the stretched film (F) is released from the clamp (51), it is brought into close contact with the O-ra (850851: 14) without elastic contraction, and the film (F) is stretched by a pair of The string-like belt (651) can be wound around the lower surface of the packaged object (A). This gives the film sufficient transparency.

As shown in Figure M1, behind the mechanism that wraps the film around the wrapped object in a cylindrical shape, there are side belts (9
G) (90) (911 (91)) are installed. These side belts are each supported by pulleys, and include a chain conveyor that transports the film and a string-like belt that wraps both sides of the film around the bottom surface of the packaged item. It rotates at the same speed as
The packaged object (A) wrapped with a film is conveyed while being held between the side belts (9G) (911 (91).
A cutting blade (92) is provided on the lower side between 91), and a groove-shaped push-cut portion 44 (93) is provided on the upper side. The push-cut 8 device member (93) marked #1 is reversed and moved up and down in accordance with the conveyance interval and timing of each packaged object (Al), and the push-cut member (93) is used as a guide (94) (94).
By moving downward toward the cutting blade (92) along, the cylindrical film ([) is cut between the items to be packaged after #1. Since the wind tunnel (961 (971) is connected to a vacuum pump via a duct (98) with an upward opening before and after the cutting blade (92), the end of the cut film is Cave (9G)
It is sucked into (97). And the anterior H sinus (9G)
The edge of the film that is being pulled into the side belt (
When the packaged item (A) moves forward in step 90), it rests on the lower surface of the packaged item and is bent. Rear wind tunnel (9
Chains (1001 (100) and chains (101) (1021 (103)) are installed on both sides of the chain (1021 (103)), and the above-mentioned lit IA (
A large number of rod-shaped O-RA (104) (1
041... are installed to form an intermittent rotation zone (105). This 1~missing rotation zone is the rod-shaped roller (104
) (On the bolt of 1041 □There is only one large gap (1
061, and normally this gap (10G) is the wind tunnel (91
), so that the end of the film is sucked into the wind tunnel (91) through the gap (106). When the end of the film is sucked into m m (9F), the intermittent rotating belt (105) is connected to the side belt C91.
) begins to rotate at a higher speed.

Therefore, as shown in Fig. 9, the edge of the film (F
4) is hooked onto the rod-shaped O-ra (104) and bent.

The film has a slight self-adhesive property, so both ends of the film folded onto the underside of the packaged item are
'f! on the cylindrical film wrapped around the packaged item. He was soon carried away.

Following the intermittent rotation zone (105), a chain foil (
A pair of chains (11
2) Many O-la between (112) (113) (113)
Roller conveyor equipped with... (1151 is ARM
are doing. As shown in Figure 10, the above 〇-ra is connected between the chains (112) (1121) on both sides [flt and shaft rods (11, 4).
) consists of a pipe (113) rotatably placed over the top of the pipe (113). As shown in FIG.
1 through a chain (117), and the running speed of the packaged items being conveyed while being held by the side belts (91) is matched with the rotational speed of the 0-La conveyor (+15). As shown in FIG. 9, a belt conveyor (1201) supported by pulleys (118) and (119) is installed behind the roller conveyor (115).
1) Heater (122) and cold #1 element (1) on the underside of the top surface.
231 and a pulley (1241) on the belt conveyor.
A presser bell (12(il) supported by (125) is installed.

In this type of packaging machine, the rearmost bell 1 to conveyor (1
201 is always rotated at a constant speed by its own motor because the temperature of the heater (122) is always constant. However, the speed of the film conveying mechanism is varied depending on the length of the object to be packaged, and the rotational speed of the side bell 1-(91) is also varied together with this film conveying mechanism. Therefore, in the conventional package SIm in which the roller conveyor t' (1151) does not exist, when the article to be packaged (A) is transferred from the side bell 1-(911 onto the belt conveyor t7 (1201), it is transferred from the side bell i (91) to the belt conveyor t7 (1201). Due to the speed difference with the mill conveyor f120), frictional resistance occurs between the lower surface of the packaged object iA) and the belt conveyor t'++201, and the bent film may peel off from the lower surface of the packaged object. However, due to the existence of the roller conveyor [51], the belt conveyor +120
When the encapsulant force (^) is transferred onto each roller (1
13ON31... rotates freely, so the packaged object (A
) and the belt conveyor (1201) to prevent the film from peeling off from the bottom surface of the packaged object.The belt (1211) heated by the heater [22]
The edge of the film is 1ff on the 5th side of the packaged item (8).
l! Then, it is immediately cooled down at Akebonobashi.

Heat dissipation from the heater (1221)
-++261 is also heated, so the heat-shrinkable film is shrunk by contact with this belt (1261).

(Effects) The present invention provides J
The inclination angle of the chain provided for transporting the film can be adjusted depending on the type of film, and the gap between the lower ends of the two chains can be narrowed. When replacing a stretchable film with a film with a smaller amount of stretching, the distance between the lower ends of both ends can be narrowed to form an M-shape in the film.

Therefore, even if the film is stretched only a small amount, there is no need to greatly change the inclination angle of the chain, so that the film can be reliably rolled around the object to be packaged.

[Brief explanation of the drawing]

Fig. 1 is a plan view of almost the entire packaging machine of the present invention; Fig. 2 is a side view of both figures; Fig. 3 is a plan view of the chain conveyor portion that stretches the film in both directions; A cross-sectional view taken along the IV-IV line in both figures, and FIG.
Cross-sectional view of the v line, Vl -VI in Fig. 6 1 to Fig. 3
Pit sectional view, Figure 7 is a side view of the part where both edges of the film are wrapped around the bottom surface of the packaged object, Figure 8 is a sectional view taken along the line An explanatory diagram of the vicinity of the bell 1-conveyor where the ends of the film are welded.
1 to 14 are operation diagrams explaining the packaging order, and FIGS. 15 and 16 are explanatory diagrams of conventional examples. (16)... Frame body, (38)... Seat table, (41
)...supply conveyor, (49)...chain, (
i3sHIN large belt, (85)...O-ra, (
90,91)...Side belt, (92)...Cutting blade, (93)...Press cutting part 11, (96,97
1...Wind tunnel, (+051...Intermittent rotation zone, (1
0G)l...Gap, ++15)...Roller conveyor, (120)...Bell l-D conveyor, ++22)
... Heater, (123) ... Cold XJ1 element, (1
2611... Presser belt.

Claims (1)

[Claims] An endless chain is supported by a horizontal supply conveyor on the upper surface that conveys the products to be packaged, and seat plates provided on both sides of the supply conveyor through a plurality of chain foils. The downward inclination angle of the plate in the direction of transporting the packaged items is adjusted, and a large number of clamps provided on the chain support both side edges of the strip-shaped film, and the film is moved in the same direction as the packaged items by rotation of the chain. a film conveying device for moving the film, and a film squeezing device for bringing both side edges of the film released from the clamp at the rear end of the chain close to the underside of the packaged object and polymerizing the film.
A device for cutting the film between each packaged object behind the film squeezing device; and a device for pulling the ends of the film cut by the cutting device toward the ground by the suction action of air, and In a packaging machine using a device that folds the underside of the packaged object, two threaded rods are rotatably supported on the machine base under the front and rear ends of the seat plates, and the threaded rods are connected in an endless manner between the two threaded rods. At the same time, the right-hand threads formed on both threaded rods are connected to the screw holes of the seat plate on one side, and the left-hand threads formed on both threaded rods are connected to the seat plate on the other side. The device is provided with a device that engages with each screw hole in the plate so that the entire interval between the two seat plates can be adjusted by operating the screw rod, and cuts the connection between the screw rod and the string-like material. A packaging machine that can handle multiple types of films with varying stretchability and is configured so that both threaded rods can be operated independently.