JPH0333606Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to wrapping objects to be packaged, particularly foodstuffs and other products in trays or other containers, using stretchable plastic films such as polyvinylidene chloride. The present invention relates to a film roll support device for a packaging machine for packaging with double film, and more particularly to a film roll support device for a type of packaging machine in which the film roll is set on a support member fixed to the main body frame of the packaging machine.

[Prior Art] Generally, a wrapping machine using a stretch film is used to wrap the packaged item into a film by pushing up the packaged item supplied to a pedestal toward the film that is supplied to the packaging section and stretched. While pressing and holding the film in a tensioned state, the film is folded onto the underside of the packaged item using a folding tool, and wrapped.
Japanese Patent Publication No. 58-37168 proposes a device configured to transport the packaged object.

By the way, the film roll support device in such a packaging machine uses the structure disclosed in Japanese Patent Publication No. 41-5808, in which a shaft is fixed to one of the left and right side plates of the main body frame, and this shaft One chuck is fixedly attached to the shaft, and after the film roll is inserted into the shaft and one end of the film roll is supported by the chuck, the other chuck is inserted into the shaft end side to support the other end of the film roll. In this state, the other chuck was fixed to the shaft.

[Problems to be solved by the invention] In the above conventional technology, the film roll is cantilevered by a single shaft, so the work of loading and unloading the roll must be done from the side of the main body frame. In addition to requiring space for the rolls to come in and out, one chuck is fixed to the shaft and one side of the roll is positioned on this fixed chuck, so it cannot accommodate changes in roll width. If the roll width is different from the preset width, the center of the film will shift from the center of the packaging machine, making it difficult to package accurately.

By the way, the roll paper holding device includes a pair of flanges having a fitting part that fits into the paper tube part of the roll paper, and a pair of shafts supported by the flanges, and the fitting part has a pair of shafts supported by the flanges. A through hole extending in the longitudinal direction of the paper tube part and at least one hole provided perpendicularly to the through hole are provided in order to slidably support the shaft, and the tip of the shaft is latched in the hole. Japanese Unexamined Patent Publication No. 60-52444 proposes an elastic body having a pin fixed thereto, and the shaft is provided with a circumferential groove that engages with the locking pin. However, this type of holding device is a type in which the roll paper and shaft are assembled integrally and set on the main body frame, so the present invention is not suitable for this type of holding device. This method cannot be applied to a type in which the rolls are set on shafts fixed to the left and right side plates of the main body frame, and the above-mentioned problems cannot be solved.

SUMMARY OF THE INVENTION An object of the present invention is to provide a film roll support device for a packaging machine that allows easy loading and unloading of film rolls and can adapt to changes in roll width.

[Means for Solving the Problems] The present invention is a film roll support device for a packaging machine that sets a film roll on a support member fixed to a main body frame. A pair of supporting members arranged so as to have a space in the center for roll entry and exit, a cylindrical receiving member slidably fitted into each of the supporting members, and a cylindrical receiving member rotatably provided in the receiving member. a rotating part formed integrally with a plurality of radial blades that fit into both ends of the film roll and rotatably support the film roll; a flange integrally formed with the outer end of the receiving member; and a fixing member for fixing the receiving member to the support member at a position corresponding to the width of the film roll, which allows a plurality of types of film rolls with different width dimensions to be exchanged from the center of the width of the main body frame. It is constructed so that the center of the roll width can be set to match the center of the frame width.

[Function] The present invention allows film rolls to be easily loaded and unloaded from the center of the front side of the packaging machine by utilizing the roll loading and unloading space between the pair of left and right support members. By sliding the pair of receiving members on the top, film rolls of various widths can be aligned with the center of the wrapping section of the packaging machine. Further, since the rotating portion is formed by integrally forming a plurality of blades in a radial manner, the rotating portion can be easily fitted into both ends of the roll.

[Example] FIGS. 4 and 5 show an overview of the overall configuration of a stretch film wrapping machine. On the front side of the main body frame 1, there is a lower part of the wrapping section 2, which is approximately in the middle of the main body frame 1. A packaged article supply device A is provided which includes a conveyor 4 for transporting the packaged articles 3 up to the point where the packaged articles 3 are transported.

At the supply side end of the conveyor 4, there is provided a pedestal 5 on which the articles 3 to be packaged are fed and placed by the conveyor 4, and this pedestal 5 is connected to a lift 6 which is moved up and down by a drive section as appropriate. , and forms a pedestal lifting device B that stretches and holds the stretch film when the pedestal 5 is raised.

On the rear side of the main body frame 1, a roll body 8 in which a stretch film 7 is wound in a roll shape serves as a support device.
The stretch film 7 is rotatably held by C', and both ends of the stretch film 7 pulled out from the roll body 8 are sandwiched between a pair of upper and lower endless belts 9 and transported to the packaging section 2 position. Devices C are arranged on both sides of the upper part of the main body frame 1 in the front-rear direction. A stretch film 7 is provided at the end of the endless belt 9 on the side where the stretch film 7 is inserted.
A film cutting device D is provided which includes a cutter 10 for making perforations in the width direction of the cutter 10, and film pressers 11 provided on both sides of the cutter 10.

A rear folding body 12 that reciprocates along the length direction of the film 7 and left and right folding bodies 13 that can be mutually opened and closed along the width direction of the film 7 are provided on the packaging section 2 side of the main body frame 1. A film folding device E is provided which cuts the film 7 from the perforation position as the bodies 12 and 13 move and folds the film onto the bottom surface of the packaged object 3 pushed up by the pedestal lifting device B. .

On the upper side of the main body frame 1, there is a carry-out member 14 that contacts the top surface of the package 3a and moves forward, and a carry-out belt that tightly contacts the film 7 at the bottom of the package 3a while the package 3a is placed and carried out. 15 and a transfer conveyor 16 is provided.

The packaged items 3 such as trays containing products are shown in Figure 6A,
As shown in FIG. 1B, the conveyor 4 of the packaged article supply device A transports the packaged articles from the front side of the main body frame 1 to the lower part of the packaging section 2 at an approximately middle portion, and supplies the packaged articles to the pedestal 5. At the same time as the object to be packaged 3 is transferred, the stretch film 7 is pulled out from the roll body 8 by the film supply device C and is sandwiched between a pair of upper and lower endless belts 9 from the rear side of the main body frame 1 toward the packaging section 2 position. A series of stretch films are transported while being inserted, and perforations 17 are formed by the cutter 10 of the film cutting device D during the transport, and thus a series of stretch films with perforations 17 are formed as shown in FIGS. 6A and B. 7 is further transferred to the packaging section 2 position.

In this manner, as shown in FIG. 6B, the article to be packaged 3 is supplied onto the pedestal 5, and a series of stretch films 7 inserted through the perforations 17 are supplied to the packaging section 2. As shown in Figures C and D, the pedestal 5 is raised by the lift 6 of the pedestal elevating device B, and the film 7 supplied to the packaging section 2 position is pushed up from below and stretched, and then the rear folding body 12 and the left and right folding bodies are raised. 13 slides along the bottom surface of the pushed-up object 3 to be packaged and separates it from the perforation 17, and folds in the edges of the film 7 from three sides, and at the same time, the film 7 is heated by the heater 18 and carried out by the carrying-out member 14. The leading edge of the film 7 is folded under the tray 19 as a result of this transfer, and then the film 7 is carried out while being in close contact with the carry-out belt 15, and then transferred by the transfer conveyor 16.

In this embodiment, in a film roll support device C', as shown in FIGS. 1 to 5, a pair of support rods 20, 20A, which are supporting members, are coaxially mounted on the inner wall surfaces of left and right side plates 1A, 1A of a main body frame 1. They are fixed facing each other at the core position to provide a roll entry/exit space in the center, and the receiving members 21, 21A are slidably inserted into the support rods 20, 20A, respectively, and correspond to the width of the roll body 8. It is configured so that it can be fixed to the support rods 20, 20A at certain positions using set screws 22, 22A, which are fixing members. In this case, the receiving member 2
1 and 21A are a pair of flanges 23 and 2, respectively.
4 and the flanges 23, 2
The rotating part 26 is rotatably supported by the shaft cylinder part 25 between the shaft cylinder parts 25 and 4, and the rotary part 26 is integrally formed with a plurality of radial blades 27 and a flange 28 from synthetic resin. The setscrews 22, 22 are attached to the flanges 24, 24 at one end of the portion 25.
A is attached. Then, with the shaft cylinder parts 25, 25 of the receiving members 21, 21A fitted into the pair of support rods 20, 20A, one support rod 20 is inserted into one end of the hollow part of the roll body 8 as shown in FIG. After inserting, insert the other support rod 20A into the other end, and then rotate the rotating parts 26, 2 of the receiving members 21, 21A.
6 fitted into both ends of the hollow part of the roll body 8, set the roll body 8 in alignment with the center position of the wrapping part of the object to be packaged 3, and then tighten each receiving member 21, 21A with the setscrews 22, 22A. It is fixed to the support rods 20 and 20A.

In the above embodiment, the roll body 8 is attached to the pair of support rods 20 and 2 fixed to the main body frame 1.
Since it is possible to enter and exit between 0A, that is, from the center of the front position of the packaging machine, it is possible to easily enter and exit without requiring a large space on the sides of the packaging machine. Moreover, since the pair of support rods 20, 20A are provided with receiving members 21, 21A, respectively, so as to be slidable along the support rods 20, 20A, even if the width of the roll body 8 is changed as appropriate, the roll body By moving both receiving members 21 and 21A in accordance with the width of the roll body 8, the roll body 8 can be set accurately and easily. Further, since the rotating portion 26 has a plurality of blades 27 formed radially, the rotating portion 26 can be easily fitted into both ends of the roll body 8, and the roll body 8 can be easily set.

FIG. 4 shows a second embodiment of this invention, in which the roll bodies 8, 8A are set in two stages, one roll body 8 having a narrow width, and the other roll body 8A being set in two stages. is formed wide.
In this case, by switching the roll bodies 8, 8A according to the size of the tray 19, it is possible to perform good packaging.
By changing the fixing device A, it becomes possible to easily set the roll bodies 8, 8A.

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the scope of the gist of the present invention. For example, the receiving member may be slidable along the supporting member and may have a rotating portion for rotatably supporting the roll, and the shape and structure of the receiving member may be appropriately selected. Further, the fixing member of the receiving member is not limited to a set screw, but may be a pin or the like. In addition, Fig. 4 and Fig. 5 show an example of the overall configuration of a packaging machine.
It can be applied to various types of film folding devices such as those disclosed in Japanese Patent Publication No. 47992 and Japanese Patent Publication No. 56-34484.

[Effect of the invention] The present invention is a film roll support device for a packaging machine that sets a film roll on a support member fixed to a main body frame. A pair of supporting members having a space for the roll to come in and out, a cylindrical receiving member slidably fitted into each of the supporting members, and a cylindrical receiving member rotatably installed in the receiving member at both ends of the film roll. a rotating part formed integrally with a plurality of radially formed blades that are fitted into the flange and rotatably support the film roll; a flange integrally formed on the outer end of the receiving member; and a fixing member that fixes the film roll to the support member at a position corresponding to the width of the film roll, and allows multiple types of film rolls with different width dimensions to be exchanged from the center of the main body frame width. Since the center of the roll width can be aligned and set, film rolls can be easily loaded and unloaded from the front side of the packaging machine, and film rolls of various widths can be aligned with the center of the packaging machine by sliding a pair of receiving members. It has the effect of being able to be set.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is an exploded perspective view, FIG. 3 is an explanatory diagram showing the assembled state, FIG. 4 is an overall vertical sectional view of the packaging machine, FIG. 5 is a plan view of the same, and FIGS. The state diagram, FIG. 7, is a front view showing another embodiment. 1... Body frame, 1A... Side plate, 2... Packaging section, 3... Item to be packaged, 3a... Packaged item, 12,
13...Folding body, 20, 20A...Supporting member, 2
1, 21A...Receiving member, 22, 22A...Fixing member, 26...Rotating part, 27...Blade, A...Packaged object supply device, B...Base lifting device, C...Film feeding device , C′...film roll support device,
D... Film cutting device, E... Film folding device, F... Unloading device.

Claims (1)

[Scope of utility model registration request] In a film roll support device for a packaging machine that sets a film roll on a support member fixed to the main body frame, the film roll supporting device is arranged coaxially with the inner surfaces of the left and right side plates of the main body frame so as to have a space in the center for entering and exiting the roll. a pair of supporting members made of
A cylindrical receiving member is slidably fitted into each of the supporting members, and a plurality of blades are rotatably provided on the receiving member and fit into both ends of the film roll to rotatably support the film roll. a rotating part integrally formed in a radial manner; a flange integrally formed on the outer end of the receiving member; and a fixing member provided on the flange for fixing the receiving member to the supporting member at a position corresponding to the width of the film roll. and a member;
A film roll support device for a packaging machine, characterized in that a plurality of types of film rolls having different width dimensions can be exchanged from the center of the width of a main body frame, and can be set with the center of the roll width aligned with the center of the width of the main body frame.