JPH03120108A - Carrying in conveyor for packing machine - Google Patents

Abstract

PURPOSE:To simplify the regulation of the pitches of transport claws and make transported matters, large or small, transportable with one conveyor, by constituting a transport claw device with a transport claw and a support body which supports the transport claw in a foldable or removable way under a table, and providing the conveyor with those transport claw devices whose number is equivalent to the multiple of a specific number. CONSTITUTION:A transport claw device 3 is linked with a transport claw 3a and an endless chain 2a at an equal pitch, and constituted with a support body 3b which supports the transport claw 3a under a table 1 removably and also in such a way as to project the tip of the claw 3a from the upper surface of the table, and a cam follower 3c which is formed at the lower part of the support body 3b. And, the number of this transport claw device 3 is set to the multiple of 6 or 12, for example, to 24. As a result, the alteration of the pitches of the transport claws can be done simply, and the transport of transported matters, large or small, can be done with one conveyor.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an inlet conveyor for a packaging machine for feeding products to be packaged one after another into a packaging machine at equal pitches.

[Prior art] Conventionally, a carry-in conveyor for a horizontal bag-form-fill-seal machine has a transport system that is linked at equal pitches to an endless chain mounted below the table through slits formed in a long table in the transport direction. The claws protrude to support the rear surface of the transported products placed on the table and transport them, and the transport claw device is designed to change the speed of the endless chain according to the film speed of the packaging machine. It is constructed so that it can be driven at variable speeds.

[Problems to be Solved by the Invention] In the above conveyor, the pitch of the conveying claws is set large so as to correspond to the maximum packaging length of the packaging machine installed adjacent to the downstream side, and cannot be changed. Goods are not provided with good operating conditions for packaging machines. In other words, the operation must be such that the 1-pitch feed of the transport claw is synchronized with the 1-pitch feed of the packaging length, but the synchronous operation using an inverter motor is a constant speed operation in which the speed of the transport claw is set higher than the film speed as required. However, it has become possible to perform variable speed operation using a servo motor, but the smaller the transported item is relative to the pitch of the transport claws, the faster the speed will increase or decrease. The rate of change in the operating budget becomes extremely large, making it difficult to achieve smooth and accurate synchronized operation.

The present invention has been devised in view of the above points.

With a simple adjustment, the pitch of the conveyor claws can be changed and the conveyed items can be conveyed, and the conveyed items can be conveyed from small to large lengths with one machine, and moreover, they can be placed on the table. To provide a carry-in conveyor for a packaging machine, which can be operated at a speed similar to the film speed of the packaging machine, and which can provide a transport speed suitable for packaging sticky products such as yokan. There is a particular thing.

[Means for Solving the Problems] As a means for solving the above-mentioned problems, the present invention provides a slit mounted on the table 1 which is elongated in the transport direction and driven by a slit provided in the table 1. The conveyance claws 3a of the conveyance claw device 3 linked to the endless chain 2a at equal pitches protrude, and the transported goods W are placed on the table l.
In a carry-in conveyor for a packaging machine, which is configured to carry the film by pushing the rear surface thereof and can change the speed of the endless chain 2a according to the film speed of the packaging machine.

The conveyance claw device 13 includes a conveyance claw 3a and the table 1.
A transport claw support capable of removably or foldably supporting the transport claw 3a at an upper end recessed below the upper surface and supporting the transport claw 3a in a state protruding a required length from the upper surface of the table l. 3b, and the number of the conveying claw devices 3 is at least 6 or a multiple of 12.

[Function] The conveyance claw 3a protrudes from the slit Ja at the rear end of the table 1 in the conveyance direction, and backs up the rear surface of the conveyed article W placed on the table l to convey it.

The reason why the number of the transport electrical equipment 313 is a multiple of 6 is that a common multiple of 2 and 3 is selected, and the length of the transported item W is larger than 1 pitch of the transport claw device 3. If it is smaller than 2 pitches, removing or folding every other piece makes it possible to place and transport the transported item W, and the length of the transported item W is larger than 2 pitches of the transport claw device 3, so that it can be transported by 3 pitches. If the size is smaller than that, removing or folding the conveying claws in two rows out of three conveyance claws enables the conveyed article W to be placed and conveyed.

Moreover, the number of the conveyance claw devices 3 is a multiple of 12, which is 2.
This is a selection of multiples that are common to the three numbers 3 and 4.

As in the case of multiples of 6 above, if the length of the transported item W is larger than 1 pitch and smaller than 2 pitches of the transport claw device 3, every other item is removed or folded and the transported item W is loaded. In addition, if the length of the transported item W is greater than 2 pitches and smaller than 3 pitches of the transport claw device 3, removing or folding two of the three transport claws in a row will make the product easier to transport. In addition to being able to place and transport the goods W to be transported, if the length of the goods W to be transported is greater than 3 pitches and less than 4 pitches of the transport claw device 3, the transport claws can be arranged in three rows for every four pieces. When it is removed or folded, the article W to be transported can be placed and transported.

As described above, although the pitch of the conveying claw device 3 cannot be changed, the pitch of the conveying claws 3a can be changed according to the length of the transported product W and can be brought closer to the packaging length. It can be operated at speeds approximating film speed.

[Example] Figures 1 to 4 show a loading conveyor for a packaging machine according to the first embodiment, which is equipped with 24 (1) transport claw devices 3 attached to an endless chain 2aK. Figure 1 shows the case of transportation without removing any of the transportation claws.
Figure 2 shows the case where every other transport claw is removed and transported, Figure 3 shows the case where every three transport claws are removed and transported in two rows, and Figure 4 is the case where four transport claws are removed and transported. The case where three pieces are removed and transported in a row is shown.

The carrying-in conveyor for a packaging machine of this embodiment includes a table l of a required length provided on the upper surface of a pedestal 5 and having a slit la of a required width long in the conveyance direction, and an endless table mounted below the table 1. The chain winding, in which the chain 2a moves along the slit)la, is linked to the mechanism 2 and the endless chain 2a at equal pitches, and the conveying claws 3a protrude from the slit)la and are placed on the table l. A large number of conveyor claw devices 3 push the rear surface of the conveyed product W to convey it, and the conveyor claw devices 3 can be driven at variable speeds so as to change the speed of the endless chain 2a according to the film speed of the packaging machine. A servo motor 4 with a reduction gear is provided as a drive source.

Guides 7 are provided on both sides of the table 1 and can be freely adjusted according to the width of the article W to be transported. The chain winding mechanism 2 consists of an endless chain 2a and four sprockets that tension the endless chain 2a) 2b
~2e, and a servo motor 4 with a reduction gear that rotationally drives the sprocket 2b.

The transport claw device 3 is linked to the transport claws 3a and the endless chain 2a at equal pitches, and removably supports the transport claws 3a at an upper end retracted below the top surface of the table l, and also supports the transport claws 3a at an equal pitch. The claw 3a is attached to the table 1.
The transport claw device 3 is composed of a transport claw support 3b that can be supported by a predetermined length projecting from the upper surface, and a cam follower 3C attached to the lower part of the transport claw support 3b.
The number is 24 as a multiple of 6 and 12.

2e → sprocket the cam follower 3C
a groove guide 6 that guides between 2d→2C→2b and maintains the conveying claw 3a in an upright state protruding from the slit)la;
is provided. especially.

This groove guide 6 has a slit (1a) at the lower end in the conveyance direction.
It is possible to maintain the upright state between the sprockets 2c and 2b, and then to maintain the upright state between sprockets 2c and 2b. can do.

In addition, the cam follower 30 is moved from sprocket 2e to 2d.
→2C→2b→2e→ It is possible to keep the conveying claw 3a in an upright state at all times by endlessly guiding the conveying claw 3a.

The reason why the conveyance claws 3a are made removable is because it is very difficult and time-consuming to change the position of the conveyance claw support 3b, and the pitch of the conveyance claws 3a is set at a fine pitch. This is because the length can be easily changed depending on the length of the transported article W by appropriately narrowing the length.

The structure in which the transport claw 3a is removable from the upper end of the transport claw support 3b is not limited to the case where the transport claw 3a is fitted in a cap shape to the upper end of the transport claw support 3b as shown in the figure. It may be connected by screws or pins, or may have a clamping function similar to clothespins, or it may be foldable.

The reason why the upper end of the transport claw support 3b is retracted below the upper surface of the table 1 is to prevent it from getting in the way of placing the transported item W on the table 1.

The reason why the number of conveyor claw devices 3 is 24 is 2, 3, 4, and 6.
A selection of multiples that are common to these four numbers.

If the length of the transported product W is smaller than one pitch of the transport electrical equipment M3, the transport is carried out without removing any of the transport claws 3a as shown in FIG. Electrical equipment! ! If it is larger than 1 pitch and smaller than 2 pitches in 3, it is removed and transported every other time as shown in Fig. If the product is smaller than 3, it is removed and transported in two rows for each three transport claws as shown in Figure 3, and the length of the transported item W is larger than the three pitch of the transport claw device 3 and less than four pitch If the length of the transported product W is too small, the transport claws are removed and transported in rows of four to three as shown in FIG.
This is because when the pitch is larger than 4 pitches and smaller than 6 pitches, the conveying claws are removed in rows of five out of six and transported.

Note that if the number of transport claw devices 3 is 60, it is a multiple of 5, so if the length of the transported item W is greater than 4 pitches and smaller than 5 pitches of the transport claw devices 3, the transport claws are It can be removed and transported in groups of 4 out of 5 in a row.

Thus, the servo motor 2f operates in synchronization with the film speed of the adjacent packaging machine.

The synchronous operation is an operation in which the 1-pitch feed of the uninterrupted conveying claws 3a is synchronized with the 1-pitch feed of the packaging length, regardless of whether it is shown in FIGS. 1 to 4.

Note that in the synchronous operation, the film speed is almost constant, while the moving speed of the transport claw 3a is operated at a constant speed that approximates this, and when the film is transferred at a variable speed and the product receiver is transferred, the film speed is almost constant. It is possible to achieve both the same speed as the feed and increase/decelerate for synchronized adjustment at other times, and the rate of change in the increase/decelerate portion during the latter variable speed operation is particularly small, and the operation of the servo motor is It can be achieved easily.

FIG. 5 shows a loading conveyor for a packaging machine according to a second embodiment.

In this conveyor, there are 24 conveyance claw devices 3, each of which is linked to the conveyance claw 3a and the endless chain 2a at equal pitches, and has an upper end recessed below the top surface of the table l. a balance way attached to the lower part of the transport claw support 3b; and a balance way attached to the lower part of the transport claw support 3b. It consists of 3d.

A rail guide 8 is provided which guides the lower part of the conveying pawl support 3b between the sprockets 2d and 2C to maintain the conveying pawl 3a in an upright state protruding from the sleeve 1a. When the transport pawl support 3b comes off the rail guide 7 near the sprocket 2c, it falls backwards due to the gravitational action of the balance weight 3d and sinks into the sleeve 1a. This conveyor is equipped with an auxiliary belt transport conveyor θ, which is attached to the former of the packaging machine installed next to it.
The items to be transported are sent to.

FIG. 6 shows a loading conveyor for a packaging machine according to a third embodiment.

This conveyor differs from the first embodiment only in that the table 1 is configured as a roller table with small diameter rolls lined on both sides of a three/tooth 1a.

In addition, in the present invention, the drive source of the endless chain includes a case where the power of the drive source of an adjacent packaging machine is branched.

[Effects of the Invention] As explained above, according to the carrying-in conveyor for a packaging machine of the present invention, ■Although the pitch of the conveying claw device cannot be changed, the pitch of the conveying claws can be changed to a state in which the conveying claws are shortened. By removing or folding the length of the transported item W, it can be changed according to the length of the transported item W, and it can be brought closer to the packaging length. A single machine can transport items ranging from small to large items.

■The transport speed of the transported items placed on the table can be operated at a speed close to the film speed of the packaging machine.
Since the relative speed between the transported product and the film can be reduced,
When packaging sticky products such as yokan, a suitable conveyance speed can be provided, contributing to the realization of good packaging.

■When using a servo motor as the drive source for an endless chain, it can be operated at variable speeds so that the product receiving speed is the same as the film feeding speed when transferring the product, and at other times the servo motor is increased or decreased for synchronized adjustment. In this case, by approximating the pitch of the conveyance claws to the bag length, the conveyance speed of the conveyed product can be operated at a speed approximating the film speed of the packaging machine, so that the rate of change of the increase/deceleration portion can be reduced. It's small enough.

The servo motor can be operated easily.

[Brief explanation of drawings]

It figure to figure 4 are #! Fig. 1 is a longitudinal cross-sectional view showing a case in which conveyance is carried out without removing any conveyor claws, and Fig. 2 is a vertical cross-sectional view showing a loading conveyor for a packaging machine according to an embodiment. FIG. 3 is a vertical cross-sectional view showing the case where the transport claws are removed and transported in two rows out of three, and FIG. FIG. 3 is a longitudinal cross-sectional view showing a case where three pieces are removed and transported in a row. FIG. 5 is a longitudinal sectional view showing a loading conveyor for a packaging machine according to a second embodiment. FIG. 6 is a longitudinal sectional view showing a loading conveyor for a packaging machine according to a third embodiment. W: Goods transported by fist.・Table, ・・Slit, ・Endless chain, ・Transport claw device, ・・Transport claw.・・Transportation claw support body,

Claims (1)

[Claims] From a slit opened in a long table in the transport direction,
The conveyance claws of the conveyance claw device, which are linked at equal pitches to an endless chain mounted below the table and driven, protrude to push the rear surface of the conveyed item placed on the table and convey it. In the carrying-in conveyor for a packaging machine in which the speed of the endless chain can be changed according to the film speed of the packaging machine, each of the conveyance claw devices is retracted below the top surface of the conveyance claw and the table. a transport claw supporting body capable of removably or foldably supporting the transport claw at an upper end thereof and supporting the transport claw in a state in which the transport claw projects a required length from the upper surface of the table, and the transport claw device; An inlet conveyor for a packaging machine, characterized in that the number of is a multiple of 6 or 12.