JPH0464973B2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) The present invention is directed to, for example, a fresh food packaging machine in which a strip-shaped packaging film is sandwiched between a pair of upper and lower belts and conveyed to the packaging section of the machine. The present invention relates to a conveyance device for use in transportation.

(Prior Art) Conventionally, as this type of conveyance device, one described in, for example, Japanese Patent Application Laid-Open No. 58-90023 has been provided. In this device, an opening/closing frame is supported at one end of the fixed frame so as to be rotatable in the vertical direction, and rollers are provided at both ends of a shaft installed on this opening/closing frame, and rollers are fixed opposite to this shaft. Rollers are also provided at both ends of the shaft installed in the frame to face the rollers, and rollers are provided at both ends of the pair of upper and lower shafts installed on the other end of the fixed frame, respectively. An endless belt is stretched between the pair of rollers and the pair of upper and lower rollers so as to face each other, and the gap between the pair of upper and lower rollers serves as a film supply port that can be separated and approached by opening and closing the opening/closing frame. . Then, the packaging film is caught in this supply port and conveyed to the packaging section.

(Problem to be Solved by the Invention) However, when the opening/closing frame is closed, the rollers on the opening/closing frame side are merely placed on the opposite rollers on the fixed frame side, so that the opening/closing frame does not operate. Occasionally, the opening/closing frame vibrates and its roller lifts slightly upwards, causing loosening of the film holding by the upper and lower belts, which may impede film transport.

Therefore, the present invention is such that the opening/closing frame is lockable.

Structure of the Invention (Means and Effects for Solving the Problems) That is, as shown in the drawings of the embodiments described later, the present invention has an opening/closing frame 12 on one end side of the fixed frame 2, which is rotatable in the vertical direction. Rollers 18 and 30 are provided at both ends of the shaft 16 supported and installed in the opening/closing frame 12, and rollers 18 and 30 are provided at both ends of the shaft 5 installed in the fixed frame 2 opposite to this shaft 16. Rollers 18 and 30 are provided facing each other, while the fixed frame 2
Rollers 21, 32 are provided at both ends of the pair of upper and lower shafts 10, 11 installed on the other end side, and an endless roller is provided between the pair of upper and lower rollers 21, 32 and the pair of upper and lower rollers 18, 30. belt 22,2
3, 33, and 34, respectively, are arranged so as to face each other vertically, and the pair of upper and lower rollers 18, 18, 30, 3
In a conveying device for packaging film or the like, which has a supply port P for the conveyed material F that can be separated and approached by opening and closing the opening/closing frame 12 between Lock mechanisms 51, 52, which position the opening/closing frame 12 so as to maintain this overlapping state when the rollers 18, 30 on the fixed frame 2 side facing this are overlapped with each other;
53, 54, 55, 56,
This vibration of the opening/closing frame 12 is eliminated, and the conveyed material F set in the supply port P is transported by both the upper and lower belts 22, 23,
33 and 34, and is transported.

(Example) Hereinafter, a case where a conveying 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.

Reference numeral 1 in the figure shows a packaging film conveying device installed at the top of the machine frame, and as shown in FIGS. is rotatably installed, and a shaft 5, a pair of upper and lower shafts 6, 7, and a pair of upper and lower shafts 8, 9 are fixed, while a pair of upper and lower shafts 10, 11 are fixed to the other side. Reference numeral 12 denotes a pair of opening/closing frames supported rotatably in the vertical direction on both front and rear ends of the shaft 6, extending from the same shaft 6 to above the roller shaft 3, and extending between the tips of the opening/closing frames 12. A support shaft frame 13 having a handle 14 is fixed to the support frame 13, and a pair of roller shafts 15 and 17 are rotatably installed on the base end side of the support frame 13, and a shaft 16 is also fixed thereto.

In FIG. 2, 18 is the pair of upper and lower shafts 16,
A pair of upper and lower rollers 19 are rotatably supported on the front side of the pair of upper and lower shafts 6 and 7, and 19 is a pair of upper and lower rollers that are rotatably supported on the front side of the pair of upper and lower shafts 6 and 7. 2 on the rear side between 18 and 19
An endless round belt 20 for books is stretched around, and one endless round belt 20 is stretched between the lower rollers 18 and 19 so as to be interposed between the two round belts 20. . Reference numeral 21 denotes a pair of upper and lower rollers rotatably supported in front of the pair of upper and lower shafts 10 and 11, and the upper roller 2
1 and the front side of the upper roller 18, three endless round belts 22 are stretched through the upper roller 19, and the lower roller 21
and the front side of the lower roller 18, four endless round belts 2 are connected via the lower roller 19.
As shown in FIG. 5, the lower running part 22a of the upper round belt 22 is interposed between the upper running part 23a of the lower round belt 23. The books are arranged alternately, forming seven belt rows M. 24 is a pair of upper and lower rollers rotatably supported in front of the pair of upper and lower shafts 8 and 9; 25 is the roller 21;
A pair of upper and lower rollers rotatably supported on the inside of the fixed frame 2, both rollers 24,
Both the upper and lower round belts 22, 23 are tensioned by 25. Note that the upper round belts 20 and 22 are also tensioned by the roller shaft 17.

Reference numeral 26 denotes a front film pressing member supported vertically movably with respect to the front fixed frame 2, and is divided into a central pressing portion 26a and lateral pressing portions 26b on both left and right sides of the central pressing portion 26a. As shown in FIG. It is interposed between the running parts. A pressure receiving plate 27 extends from the fixed frame 2 in correspondence with the presser member 26, and is interposed between the upper and lower running portions of the upper round belt 22, as shown in FIG.

Reference numeral 28 denotes a moving frame that is inserted through the lower shafts 5, 7, 9, and 11 so as to be movable in the axial direction thereof, and female threaded portions 29a are attached to both left and right sides of the moving frame.
A male threaded portion 29 is screwed into the portion. Both male threaded rods 29 are supported by the fixed frame 2 and are interlocked with each other by a chain 29b, and a handle 29c is attached to one of the male threaded rods 29 on the outside of the fixed frame 2 on the rear side, and when the handle 29c is rotated, The movement of the moving frame 28 is adjustable. Note that the upper shafts 16, 17, 6, 8, 1
0 can cut into a notch 28a formed on the upper edge of the moving frame 28.

Reference numeral 30 indicates a pair of upper and lower rollers that are movably and rotatably supported in the axial direction relative to the pair of upper and lower shafts 16 and 5 so as to be positioned within the moving frame 28, and 31 indicates the pair of upper and lower shafts. 67 is a pair of upper and lower rollers supported in the same way, and two endless round belts 48 are stretched between the upper rollers 30 and 31 on the front side, and the lower rollers 30 and 31 are 31, one endless round belt 48 is stretched between the two round belts 48. 32 is a pair of upper and lower rollers similarly supported by the pair of upper and lower shafts 10 and 11;
These rollers 30, 31, and 32 are pushed by the moving frame 28 as the moving frame 28 is adjusted, so that they follow the moving frame 28 and move in the axial direction.

Reference numeral 33 indicates four endless round belts stretched between the upper rollers 30 and 32 via the upper roller 31, and 34 indicates the lower rollers 30 and 32.
Six endless round belts are stretched through the lower rollers 31 between them, and as shown in FIG.
The lower running portion 33a of the upper round belt 33 is interposed between the running portions 34a except between the two running portions 34a, and the upper and lower running portions 33
A and 34a are arranged alternately one by one to form ten rows M. Reference numeral 35 denotes a pair of upper and lower rollers that are movably and rotatably supported in the axial direction of the pair of upper and lower shafts 8 and 9 so as to be positioned within the movable frame 28; Both round belts 33 and 34 are tensioned by a pair of upper and lower rollers 36 that move in the axial direction following the movement adjustment and are rotatably supported with respect to the moving frame 28 inside the roller 32. . Note that the upper round belt 33 is also tensioned by the roller shaft 17.

Reference numeral 37 denotes a film pressing member on the rear side that is vertically movably supported with respect to the movable frame 28, and is divided into a central pressing portion 37a and lateral pressing portions 37b on both sides of the central pressing portion 37a. Reference numeral 38 denotes a pressure receiving plate extending from the upper part of the moving frame 28 in correspondence with the pressing member 37, and the positional relationship between the rear pressing member 37 and the pressure receiving plate 38 and the upper and lower round belts 33, 34 is on the front side. This is the same as in the case of the film holding member 26 shown in FIG.

Then, as shown in FIG. 2, the round belt 2
2, 23 and the round belts 33, 34, there are packaging parts S corresponding to the front and rear film pressing members 26, 37.
is configured.

In particular, as shown in FIGS. 2 and 3, the double opening/closing frame 1
A lock shaft 51 is rotatably installed between the distal ends of the fourth lock shaft 51 on the distal end side of the support frame 13.
As shown in the figure, lock claws 52 are fixed to both ends of the opening/closing frame 12 so as to be integrally rotatable, and an operating knob 53 is fixed to the center thereof so as to be integrally rotatable. A torsion coil spring 54 is wound around one end of this lock shaft 51 inside one of the opening/closing frames 12, so as to urge the lock shaft 51 in the rotational direction of arrow A. A stopper shaft 55 is provided protruding from the outside of both opening/closing frames 12, and is adapted to come into contact with both lock pawls 52, which are biased and rotated together with the lock shaft 51, to prevent their rotation. Locking rods 56 are provided protruding from both inner sides of the fixed frame 2. When the opening/closing frame 12 is closed and the rollers 18, 30 on the opening/closing frame 12 side and the opposing rollers 18, 30 on the fixed frame 2 side overlap each other, both the lock claws 52 lock onto the locking rod. 56
The opening/closing frame 12 is positioned to maintain this overlapping state. on the other hand,
When the lock shaft 51 is rotated in the direction of arrow A against the bias of the torsion coil spring 54 using the operating knob 53, both lock pawls 52 are released from the locking rod 56.
The opening/closing frame 12 can be lifted by the handle 14 as it is. Further, when the opening/closing frame 12 is closed, both the lock pawls 52 come into contact with the locking rod 56 and rotate in the direction of the arrow A, and then return and are hooked on the locking rod 56. The lock shaft 51, the lock claw 5
2. The operating knob 53, the torsion coil spring 54, the stopper shaft 55, and the locking rod 56 constitute a locking mechanism.

In FIG. 2, 41 is a gear fixed to both the upper and lower rollers 21, and 42 is a gear fixed to both the upper and lower rollers 32 and movable in the axial direction together with the rollers 32. The driving rotation of the lower shaft 11 is transmitted to the roller 2.
Rotation is transmitted to each part via round belts 1, 32, round belts 22, 23, 33, 34, etc. Reference numeral 43 in FIG. 1 is a saw blade for forming perforations provided between both roller shafts 3 and 4 on one side of the fixed frame 2.

A case will be described in which a packaging film F is set from one of a pair of upper and lower winding rolls 44 provided on one side of the machine frame in the packaging film conveying apparatus 1 constructed as described above. In this case, move the moving frame 28 by operating the handle 29c in advance.
The position of is adjusted according to the width dimension of the packaging film F. Then, after releasing the engagement between both lock claws 52 and the locking rod 56 shown in FIG. 4, grasp the handle 14 on one side of the machine frame and lift it upward.
As shown in the figure, the opening/closing frame 12 rotates upward about the shaft 6, and the upper rollers 18, 30 and the lower rollers 18, 30 are separated, and the film supply port P is opened. From this state, the starting end of the packaging film F on the take-up roll 44 is guided to the supply port P via both roller shafts 3 and 4, and as shown in FIG. Put it on top. Next, when the opening/closing frame 12 is returned downward and both lock claws 52 are hooked on the locking rod 56, the film supply port P is closed.
Upper rollers 18, 30 and lower rollers 18, 3
0 are polymerized, and both ends of the packaging film F in the width direction are attached to the upper round belts 22, 33 as shown in FIG.
Lower running parts 22a, 33a and lower round belt 2
For the belt row M with the upper running parts 23a, 34a of 3, 34, the running parts 23a, 3 of the first row from the inside
4a, below the second row running parts 22a and 33a,
The packaging film F is alternately inserted onto the running portions 23a and 34a of the third row and becomes in an up-and-down meandering state, and the packaging film F waits at the supply port P as shown by the two-dot chain line in FIG.

Next, an outline of the actual packaging operation will be explained. When the film transport device 1 is driven, the starting end of the packaging film F located at the supply port P is transported toward the packaging section S in the center of the transport device 1, as shown by the two-dot chain line in FIG. . At this time, the locking mechanism prevents the opening/closing frame 12 from swinging, and the packaging film F is moved between the upper and lower round belts 22, 2.
3, 33, and 34, and is transported.

During the conveyance, the saw blade 43 instantaneously moves upward to form perforations in the width direction at every fixed length of the packaging film F, and furthermore, an instantaneous brake is applied to the roller shaft 4, causing both the upper and lower shafts 15, 4 The packaging film F held between the packaging film F is pulled and is cut at the perforations by this tension, and then the film F is conveyed to a packaging section S shown by a two-dot chain line in FIG. In synchronization with this conveyance operation, as shown in FIG.
It is fed upward and placed on the pedestal 46.

As shown in FIGS. 6a and 7b and 7a and 7b, the packaging film F stretched on the packaging section S is moved upward by the front and rear film pressing members 26 and 37, so that the packaging film F is pressed against the respective pressing portions 26a and 26b. , 37a, 37b and the pressure receiving plates 27, 38 together with the belt row M, and the packaging film F is prevented from coming off.

From this packaging film clamping state, when the pedestal 46 is moved upward and the article W is pushed up to the packaging position as shown by the two-dot chain line in FIG. 1, the pedestal 46 is moved down (not shown). At the same time, the packaging film F is folded under the article W from both the rear and left and right directions. In synchronization with this folding operation,
Center pressing part 37a of rear film pressing member 37
Then, the horizontal pressing portion 37b and the front film holding member 26 are released from being held by the horizontal pressing portion 26b. Thereafter, when the item W is transferred forward, the clamping by the central pressing part 26a of the front presser member 26 is released, and the packaging film F is also folded in from the front under the item W, completing the packaging. do.

As described above, one process of the packaging machine is completed. In this embodiment, since the opening/closing frame 12 is reliably positioned by the locking mechanism, the rollers 18 and 30 on the opening/closing frame 12 side are lifted up. is prevented, and both upper and lower round belts 22, 23, 3
There is no possibility of the film being held loose by the 3 and 34, and the film can be transported reliably.

Effects of the Invention In short, according to the present invention, the supply port P is expanded by the opening/closing operation of the opening/closing frame 12, and the conveyed material F is transferred to the supply port P.
In the transport device 1 which is easy to set, a locking mechanism for the opening/closing frame 12 is provided, so that it is possible to prevent trouble in film transport due to swinging of the opening/closing frame 12.

[Brief explanation of drawings]

Fig. 1 is a schematic front view of a fresh food packaging machine using the packaging film transport device according to the present embodiment, Fig. 2 is a schematic plan view of the transport device, and Fig. 3 shows the supply port of the transport device. 4 is a partial perspective view showing the locking mechanism of the opening/closing frame; FIG. 5 is a schematic enlarged sectional view taken along line X-X of FIG. 2; FIGS. 6 a, b, and 7. Figures a and b are partial cross-sectional views showing the state in which the film is held by both the front and rear film holding members. Packaging film transport device...1, Fixed frame...
2, Axis...5, 10, 11, 16, Opening/closing frame...1
2, Roller...18, 21, Round belt...22,
Lower running part...22a, round belt...23, upper running part...23a, film holding member...26,
Rollers...30, 32, Round belt...33, Lower running part...33a, Round belt...34, Upper running part...34a, Film holding member...37, Lock shaft...51, Lock claw... ...52, Operation knob...
...53, Torsion coil spring...54, Stopper shaft...55, Locking rod...56, Packaging film...
F (conveyed material), supply port...P.

Claims (1)

[Scope of Claims] 1. An opening/closing frame 12 is supported rotatably in the vertical direction on one end side of the fixed frame 2, and rollers 18 and 30 are provided at both ends of a shaft 16 installed on this opening/closing frame 12, Rollers 18, 30 are also provided at both ends of the shaft 5, which is installed on the fixed frame 2 opposite to this shaft 16, and rollers 18, 30 are provided opposite to the rollers 18, 30. Rollers 21 and 32 are provided at both ends of the shafts 10 and 11, respectively, and the pair of upper and lower rollers 21 and 32 and the pair of upper and lower rollers 1
8, 30, the endless belts 22, 23, 3
3 and 34, respectively, are hung so as to face each other vertically, and the pair of upper and lower rollers 18, 30, 30, 30 can be separated and approached by opening and closing the opening/closing frame 12, and a supply port P for the conveyed material F is used. In the conveying device, when the opening/closing frame 12 is closed and the rollers 18, 30 on the opening/closing frame 12 side and the rollers 18, 30 on the fixed frame 2 side opposing this are overlapped with each other, this overlapping state is maintained. Lock mechanisms 51, 52, 53, 54, 55, 5 for positioning the opening/closing frame 12 as shown in FIG.
6. A conveying device for packaging films, etc., characterized by being provided with a.