JPS63152512A - Article carry-out device in packaging machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Purpose of the Invention (Field of Industrial Application) This invention is particularly directed to a fruit and vegetable packaging machine for packaging flexible trays, in which a packaging film stretched and gripped by the packaging section is folded onto the tray. The present invention relates to an article unloading device installed above a folding device for packaging articles.

(Prior Art) Conventionally, for example, in the packaging machines described in JP-A-58-90010 and JP-A-61-142114,
When the tray placed on pedestal 4A is pushed up to the packaging position from the state in which the packaging film stretched on the packaging section is held between the front and rear presser members at both edges in the width direction, the packaging film is The film is stretched while covering the tray from above, and then the packaging film is folded by a folding device below the tray to package the tray.

That is, for example, in the folding device of the packaging machine, the rear folding member moves in the front and rear directions with respect to the fixed front folding member, approaching and separating from each other, and as the rear folding member moves back and forth below the rear folding member (\ left and right). Both folding members open and close each other, and the article mounting table provided upright on the pedestal device can tilt inward when it comes into contact with the rear folding member and both left and right folding members.

Then, as the rear folding member moves forward and the left and right folding members close each other, these folding members push the packaging film toward the bottom of the tray on the mounting table and contact the mounting table. Touch it and tilt it. When the pedestal device moves downward at the same time as this tilting, the tray is sequentially placed on the rear folding member from the rear side of the lower surface, and the packaging film is folded from behind and from both the left and right sides under the tray. . Then due to the rotation of the conveyor belt.

When the tray is transferred forward and transferred from the rear folding member to the front folding member, the packaging film hits the front folding member on the underside of the tray during transport and is folded from the front as well, causing the tray to be folded from the rear. The folds from both the left and right directions overlap, and the folds from the front overlap to form a folded portion at the bottom of the tray. Next, the rear folding member retreats, and as the rear folding member retreats, the left and right folding members also open from each other.

(Problems to be Solved by the Invention) The conveyor belt can be vertically adjusted according to the height of the tray, so that the tray will not be crushed even if it is pushed up to the packaging position. However, this vertical movement adjustment is performed using a manual handle, so if the height of the tray changes during packaging, it is necessary to stop the packaging machine and make the adjustment, which reduces work efficiency. was there.

Therefore, the present invention improves work efficiency by automating this K111tD.

Structure of the Invention (Means for Solving Problems) That is, as shown in the drawings of the embodiments described later, the present invention provides an article holder device 46 on which an unpackaged article W is placed and moved upward to the packaging section S. Correspondingly, an article discharge conveyor 104 installed above the packaging section S, and support mechanisms 102, 113, and 116 that support this article discharge conveyor 104 and are movable up and down,
A drive mechanism 131 that moves the support mechanisms 102, 113, and 116 up and down, and an article contact surface 104a of the article delivery conveyor 104 relative to the article placement surface 46a when the article pedestal device 46 moves upward to the packaging section S. A storage means 172 that stores position data N in advance according to the height H of the unwrapped article W, an article height detection means 153 that detects the height H of the unwrapped article W, and this article height detection means a first indexing means 171 that calculates the height H of the article W based on a detection signal from the article W; a position detecting means 160 that detects the position of the article contacting surface 104a of the article carrying out conveyor 104;
a second indexing means 171 that calculates the position of the article contacting surface 104a of the article delivery conveyor 104 based on the detection signal from the position detection means 160; and the first indexing means 17.
Drive control of the drive mechanism 131 so that the position data N of the product contact surface 104a of the product delivery conveyor V104 with respect to the height H of the product W calculated in step 1 matches the position data N read from the storage means 172. The drive control means 171 is equipped with a drive control means 171 that performs the following operations.

(Function) In the article unloading device configured as described above, the article height detection means 153 automatically detects the unwrapped article W according to its height H, and the drive mechanism 13
1 is driven and controlled to move the support mechanisms 102, 113, and 116 up and down, and the position of the article delivery conveyor 104 is automatically adjusted according to the height 1'' of the article W.

(Example) Hereinafter, a case where an article delivery device according to an example of the present invention is used in a fresh food packaging machine will be described with reference to the drawings.

Fig. 1.2 shows a round belt type film transport device 1 installed on the upper part of the machine frame, and as shown in Fig. 2, the starting end of the packaging film F is guided and set from the film supply port P. From this set state, the packaging film F is spread onto the packaging section S shown in FIG. 1 by driving the conveying device 1.

As shown in FIGS. 1 and 2, a packaging film folding device 76 is installed above this packaging film conveying device 1, and a packaging film folding device 76 is installed above the packaging film conveying device 1.
As shown in FIG. 3, both sliders 79, which are supported so as to be movable in the front and back direction l\, with respect to rails 78 disposed on both left and right sides of the upper part of the machine frame, are connected to a connecting plate 80 and rollers 8 on both the front and rear sides thereof.
The rear folding member 82a connected at 1 is a left and right support member 82 that is supported movably in the left and right direction with respect to a support plate 83 installed between the rear ends of the rails 78 at the rear of the rear folding member 77. is a left and right folding member supported by a shaft 84 so as to be rotatable in the left and right direction with respect to both support members 82a, and a rear folding member 77 is supported from the same shaft 84 (rotation fulcrum).
It extends forward through the lower part of the auxiliary folding plate 86 at the tip.
is screwed on so that its position can be adjusted.

Reference numeral 89 denotes a front folding member installed between the front ends of both the rails 78, which includes both front and rear conveyance rollers 90 and a folding roller 91 provided behind the rear side conveyance roller 90. A plurality of round belts 90a are passed between the rear conveyance roller 9o and the folding roller 91 at both ends thereof.
B is crossed so that the rain belts 90a and 90b rotate only in the direction of arrow C.

Reference numeral 140 denotes a threaded rod supported on the support plate 83 so as to extend in the left-right direction, and has a left-hand threaded portion 140a and a right-hand threaded portion 140b.
One of the support members 82a is screwed into the left-hand threaded portion 140a, and the other support member 82a is screwed into the right-hand threaded portion 140b. 141 is an electric motor installed on the machine frame behind the left and right support members 82a, and a pulley 142a of its output shaft 141a is connected to a pulley 142b attached to a threaded rod 140 between the left and right support members 82a. On the other hand, they are interlocked via a flat belt 142. When the threaded rod 140 is rotated by the electric motor 141, it moves on the left and right support portions 182a and 140a and 140b, approaching or separating from each other.

In Fig. 3.4, 143 is the left and right support member 82a.
It is a guide plate in the shape of a lance fixed to the front part of the board, and consists of a base plate part 143a extending to both left and right sides and an engagement plate part 143b extending forward along the rail 78 from the tip of the base plate part 143a. Roller 144 attached to the tip
is supported so as to be movable in the left-right direction on a rail portion 145 on the machine frame. Then, when the left and right support parts 182a move in the left and right direction, the left and right guide plates 1 and 182a move along with this movement.
43 also moves in the same direction.

146 is a guide groove formed in the engagement plate portion 143b of the guide plate 143 so as to extend in the front-rear direction, and 147 is a guide pin engaged with the guide groove 146, which is located below the engagement plate portion 143b. The elongated hole 148 is connected to the protruding plate portion 79a of the folding member 77 that protrudes from the slider 79.
It is supported so that it can move in the left and right direction. 149
are the lower end of the guide pin 147 and the left and right folding members 82
It is a link rotatably supported between the front end side of the Then, the slider 79 of the rear folding member 77
When the slider moves forward and backward along the rail 78, the guide pin 147 moves along the guide groove 146 of the guide plate 143, and both the left and right folding members 82 are rotated about the pivot point 84 by the link 149. open and close each other. Moreover, when the left and right folding members 82a1fi approach and separate from each other, while the guide bin 147 moves along the long hole 14B of the slider 79, the left and right folding members 82, the guide plate 143, the guide pin 147, and the link 149 are the same. Move in parallel to the left and right while maintaining the positional relationship.

In FIGS. 1 and 2, 93 is a bracket erected on the rear end of the rail 78, and 94 is a lever fixed to a support shaft 95 rotatably installed between the upper parts of the bracket 93. It is rotatably supported by a shaft 96a with respect to an interlocking rod 96 that is driven up and down. 97 is a pair of levers fixed to both ends of the support shaft 95 on the outside of the bracket 93; 98 is a link rotatably supported by a shaft 99 at the tip of the lever 97; It is supported by a shaft 100 so as to be rotatable relative to the shaft 100.

When the interlocking rod 96 is in the upward movement position, the rear folding member 77 is in the retracted position and the left and right folding members 82 are in an open state as shown in FIG. When the interlocking rod 96 moves downward from this state, the rear folding member 77 moves between the lever 97 and the link 9, as shown in FIG.
8 moves forward, and the guide groove 146 of the guide plate 143 is regulated in position by the guide bin 147 of the rear folding member 77, and both the left and right folding members 82 close to each other via the link 149, and these front, rear, left and right folding members 89°77.82
The space between them is a folded part R. As shown in FIG. 1, this folding section R corresponds to the packaging section S of the packaging film transport Mffi1.

FIG. 1.2 shows a device 101 for discharging goods W, and reference numeral 102 denotes a support shaft 103 installed between the lower portions of both the brackets 93.
a pair of links rotatably supported on both sides of the
Reference numeral 3 denotes a pair of links that are rotatably supported on both sides of a support shaft 114 installed between both brackets 93 below the support shaft 103, and each link 102.
113 extends forward from the support shafts 103, 114. 1
16 is a shaft 11 between the tips of both links 102 and 113.
6a and 116b are rotatably connected to each other, and a roller 120 is attached to a portion extending forward from both the left and right shafts 116b on the lower side. 104
is a conveyor on which an endless sponge belt 104a is stretched, and a guide plate 1 extends rearward from both sides of the rear end.
15, the guide plate 115 is supported so as to be rotatable in the vertical direction with respect to the shaft 116b, and the guide plate 115 is placed on the roller 120 of the interlocking link 116, and is horizontally mounted on the packaging section S of the packaging film conveying device 1. The condition is being addressed. 117 is a connecting rod connected between both the interlocking links 116, and 11B is a screw that is rotatably supported by a support rod 119 installed between the upper parts of both brackets 93; They are screwed together. Note that each of the links 102, 113, and 116 allows the support shafts 1 to
A four-bar link type support mechanism is constructed with fixed nodes between 03 and 114.

In FIG. 5, 131A is an electric motor installed on the support rod 119, and the pulley 1 of the output shaft 131a is
32a is a pulley 132b attached to the threaded rod 118.
It is interlocked with the other via a flat belt 132. When the screw rod 118 is rotated by this electric motor 131Δ,
The connecting rod 117 moves along the threaded rod 118, the links 102 move vertically around the support shafts 103 and 114, and the rollers 120 of the interlocking link 116 move the guide plate 115 of the conveyor 104. while conveyor 10
4 moves in parallel in the vertical direction. And the threaded rod 11
8. The vertical drive mechanism 131 of the conveyor 104 is operated by the rotator 131A and the flat belt 132.
is configured.

108 is a belt pulley fixed to the drive shaft 104b of the conveyor 104, 109 is a belt pulley rotatably supported by the support @114, and both belt pulleys 108 and 109
A round belt 110 is stretched between them. Reference numeral 121 denotes an idler pulley fixed to the guide plate 115 of the conveyor 104, which tensions the round belt 110.

111 is the support 111 so as to be interlocked with the belt pulley 109;
A sprocket rotatably supported with respect to 4,
It is designed to be driven and rotated by a chain 112.

Then, when the chain 112 is rotated in the direction of arrow D,
Sprocket 111, belt wheel 109, round belt 11o
1 Belt 10 of conveyor 104 via belt wheel 1o8
4a rotates in the feeding direction E. However, the sprocket 111 is connected to the support shaft 114 by the one-way clutch 111a.
Since the rotation of the chain 112 is not transmitted to the sprocket 111, the belt 1 of the conveyor 104
04a does not rotate in reverse.

In FIG. 1, reference numeral 45 denotes a belt conveyance type article supply device installed below the film conveyance device 1 both inside and outside the machine frame, and 46 denotes an inner end of the article supply device 45, the wrapping section S and the folding section R. A plurality of loading tables 46 which are tiltably biased and which are moved up and down between
a, and the article W is transferred from the article supply device 45 and placed thereon at the lowest moving position, and is positioned by a stopper 47.

Reference numeral 150 denotes an item size detection device installed on the item supply device 45, and as shown in FIG. 6, a plurality of (in this embodiment, 16
The article width detection sensor 152 (rechargeable switch) of 11ii1) is installed in the left and right direction substantially perpendicular to the conveyance direction V of the article W, and a light emitting element 153a and a light receiving cable 153b are installed in the vertical part 151b. A plurality of (four in this embodiment) article height detection sensors 153 (photoelectric switches) are arranged in a vertical direction substantially perpendicular to the conveyance direction V of the article W. In particular, each article width detection sensor 152 is located on both sides of the conveyance center V1 of the article supply device/15 in a line-symmetrical position with respect to the conveyance center V1, and in this embodiment, the distance between the two innermost sensors 152 is set to a. At this time, the sensors 152 on the outside are arranged at equal intervals a/3.

Note that the intervals between each article width detection sensor 152 and each article height detection sensor 153 can be adjusted.

In FIG. 5, 160A is a potentiometer installed on the support rod 119 of the article unloading device 101,
It is interlocked with the threaded rod 118 via gears 161 and 162. Then, the screw rod 1 is driven by the electric motor 160A.
18 is rotated, the rotational displacement of the threaded rod 118 is transmitted to the potentiometer 160A. Therefore, when the article receiving device 46 moves upward to the packaging section S, the placing device 46
6a (top article placement surface) and the belt 1 of the conveyor 104
The potentiometer 160A detects a detection signal proportional to the distance N between the outer periphery WJ (product contact surface) and the outer circumference WJ (product contact surface) of 04a. A position detecting means 160 for the conveyor 104 is constituted by the threaded rod 118, the potentiometer 160A, and the like.

In FIG. 1.2, reference numeral 26 denotes a front presser member 3 attached to the front side of the packaging section S of the packaging film conveying device 1;
Reference numeral 7 denotes a rear holding member which is also attached to the rear side, and both front and rear edges of the packaging film F stretched over the packaging section S are held by these holding members 26° and 37. Reference numeral 43 denotes sawtooths mounted near the film supply port P of the packaging film conveyance device 1, and are configured to form perforations at intervals of a certain length of the packaging film F during conveyance. Reference numeral 48 denotes a heater device on which the packaging section made up of the front folding member 89 is placed.

Next, the electrical configuration of the packaging machine configured as described above will be described.

In FIG. 7, a microcomputer 170 is composed of a central processing unit (hereinafter referred to as CPtJ) 171, a program memory 172 consisting of a read-only memory (ROM), and a working memory 173 consisting of a readable and rewritable memory (RAM). It is built into a control box (not shown) installed in the equipment.
171 operates based on a control program stored in program memory 172.

In addition to the control program, the program memory 172 stores the optimum conveyor V1 according to the height H of the unpackaged items W.
04 position data is stored in advance (storage means).

1, that is, the number of items U detected by the item height detection sensor 153
When the height H of the item W is divided into certain ranges corresponding to Hl, N2... (Hl<N2), the height H of the item W on the mounting table 46a of the item holder device 46 in the packaging section S ( N1 as the distance N (position data) between the article mounting surface) and the outer peripheral surface (article contact surface) of the belt 104a of the conveyor 17104;
N2...(N1<N2) is selected. In this embodiment, Ul, U2. U3. When L12, Nl, N2. N3. Becomes N4.

Each of the item height detection sensors 153 is inputted to CP and tJ171, and the CPU 171 calculates the height H of the item W based on this input signal as the number of items aU detected by each of the item height detection sensors 153. (first indexing means). This calculation result is temporarily stored in the working memory 173.

Further, the potentiometer 160A is input to the CPU 171, and the CPU 171 calculates the interval N based on this input signal (second indexing means).
. This calculation result is temporarily stored in the working memory 173.

Furthermore, the CPU 171 reads the distance N for the height H of the item W stored in the working memory 173 from the program memory 172, and compares this position data N with the position data N from the working memory 173. ,
The electric motor 131A is drive-controlled to match these values (drive control means). That is, by this drive control, when the height H of the article W is large, the interval N also increases, and conversely, when the height H is small, the interval N also decreases.

Although the details of the article width detection sensor 152 of the article size detection device 150 are omitted, the sensor 152
The detection signal is the basis for selecting the film length and is used to control various devices.

Next, an outline of the actual packaging operation will be explained.

When an item W (a tray containing an item) is placed on the item supply device 45, the item W is transferred by the drive of the item supply device 45.

When the article W enters the article size detection device 150 shown in FIG. 6, the article width detection sensor 152 and the article height detection sensor 15
3 automatically detects the item W according to its size. Then, in accordance with the number U of items detected by the item height detection pincer 153, #j of the item receiving stand device 46 in the packaging section S, on the placing stand 46a (item placement surface), and on the belt 10 of the conveyor 104.
The distance N from the outer peripheral surface (product contact surface) of 4a is automatically adjusted according to the height 1'' of the product W.

Next, the item W is placed on the pedestal device 46 that has moved downward. At this time, the rear folding member 77 is moved backward by the upward movement of the interlocking rod 96.

When the film transport device 1 is driven in synchronization with this feeding, the starting end of the packaging film F located at the supply port P is transported toward the packaging section S at the center of the transport device 1. On the way, perforations are formed in the width direction of the packaging film F by the saw teeth 43 at every fixed length, and an instantaneous brake is applied at the supply port P to pull the packaging film F, and this tensile force causes the It is cut at the perforations and conveyed to the top of the packaging section S.

The packaging film F on the packaging section S has both front and rear pressing parts 4426
．． It is clamped by the upward movement of 37.

Next, when the pedestal device 46 moves upward and the item W pushes up the packaging film F, the item W is covered with the packaging film FT.

Thereafter, when the interlocking rod 96 moves downward with the active movement of the pedestal device 46, the rear folding member 77, which is in the retreated position, moves forward. Along with this forward movement, both the left and right folding members 82 also approach each other. Next, when the rear folding member 77 and both left and right folding members 82 enter below the article W, and the pedestal device 46 moves downward again, the article W is placed on the rear folding member 77 and backwards under the article W. The folding operation of the packaging film F is performed from both left and right directions. In synchronization with this folding operation, the rear presser member 37
The clamping by the front presser member 26 is released, and only the clamping by the front presser member 26 is maintained.

Thereafter, when the belt 104a is rotated and the clamping by the front pressing member 26 is released, the article W is conveyed forward and transferred from the rear folding member 77 onto the front folding member 89. During the transfer, the packaging film F hits the folding member 89 on the underside of the item W and is folded in from the front as well, and the folding from the rear is overlapped with the folding from both left and right directions, and the folding from the front is further overlapped, resulting in the product W being folded from the front.
The folding part is on the bottom side. Next, the interlocking rod 96 is moved upward again and the rear folding portion vI77 is retreated, and as the rear folding portion vI77 is retreated, both the left and right folding members 82 are opened to each other.

After packaging, the product W is carried out to the heater device 48, where the folded portion is brought into close contact with the product W, thereby completing one process.

Effects of the Invention In short, according to the present invention, the vertical movement of the article delivery conveyor 104 can be automatically adjusted in accordance with the height H of the article W, resulting in an effect of improving work efficiency.

[Brief explanation of the drawing]

Fig. 1 is a schematic cross-sectional view showing the side surface of a fresh food packaging machine using the article delivery device according to the present embodiment, Fig. 2 is a schematic cross-sectional view taken along line X-X in Fig. 1, and Fig. 3 is a schematic plan view showing a packaging film folding device, FIG. 4 is a partial sectional view showing an interlocking mechanism of the folding device, and FIG. FIG. 6 is a partial sectional view showing the article size detection device, and FIG. 7 is an electrical block circuit diagram. Film conveyance device 1, article supply device 45, article pedestal device 46, mounting table 46a (article placement surface), film folding wave@76, article unloading device 101, link 102, conveyor 104, belt 1.04a (article contact ), link 11
3. Interlocking link 116, threaded rod 118, conveyor upper and lower drive structure 131, electric motor 131A, article size detection device 150, article height detection sensor 153, conveyor position detection means 1601 potentiometer 160A, microcomputer 170. CPU 171 (first and second indexing means and drive control means), program memory 1
72 (storage means), packaging section S, folding section R1 article W1 packaging film F0 Patent applicant Fujipack System Co., Ltd. Agent
Person Patent Attorney On 1) Hironobu Figure 5

Claims (1)

[Claims] 1. An article carrying device installed above the packaging section (S) corresponding to the article holder device (46) on which unpackaged articles (W) are placed and moved upward to the packaging section (S). A conveyor (104), a vertically movable support mechanism (102, 113, 116) that supports this article delivery conveyor (104), and a drive mechanism (131) that vertically moves this support mechanism (102, 113, 116). and position data (N) of the product contact surface (104a) of the product delivery conveyor (104) with respect to the product placement surface (46a) when the product pedestal device (46) moves upward to the packaging section (S). storage means (172) for storing in advance according to the height (H) of the unwrapped article (W); and article height detection means (153) for detecting the height (H) of the unwrapped article (W). ), a first indexing means (171) for calculating the height (H) of the article (W) based on the detection signal from the article height detecting means (153), and the article carrying-out conveyor (104). Product contact surface (104
a) position detection means (160) for detecting the position of item a); and an article contact surface (104a) of the article delivery conveyor (104) based on a detection signal from the position detection means (160).
a second indexing means (171) for calculating the position of the article (W) calculated by the first indexing means (171);
The drive mechanism is arranged so that the position data (N) of the article contacting surface (104a) of the article carry-out conveyor (104) with respect to the height (H) of the article corresponds to the position data (N) read from the storage means (172). An article delivery device for a packaging machine, characterized in that it is equipped with a drive control means (171) for driving and controlling the drive control means (131).