JPH0128002Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to an automatic bundling machine for bundling articles using steel strips, and more specifically, to an improvement of a switching unit for a multi-strip steel strip supply passage. .

[Conventional technology]

When binding items with steel strips, there are two types of steel strips: colored steel strips and white steel strips (uncolored), depending on the binding specifications of the items to be bound.
Alternatively, there are differences in the steel strips used depending on the thickness of the steel strip, and the work of changing steel strips is particularly frequent in automatic bundling machines installed on delivery lines for production lines that produce a wide variety of products in small quantities. Further, even when the same type of steel strip is used continuously without changing the steel strip, there is a problem of replenishment loss time due to the decrease and disappearance of the steel strip bundle, and it is necessary to replenish without interfering with the production line.
From this point of view, in order to quickly supply new steel strip, a two-dispenser system or a multiple-dispenser system is used to smoothly switch the supply of steel strip, and a steel strip switching unit is used for this purpose. Ta.

A conventional steel strip switching unit, as shown in FIG. 4, an example of which corresponds to FIG. 3 of the embodiment, has a steel strip 1C guided from one dispenser.
A pinch drive roll 41C for the steel strip 1D led from the other dispenser and a separate pinch drive roll 41D for the steel strip 1D led from the other dispenser are provided, and each is driven by independent and separate drive sources 43C and 43D. Therefore, the steel strip was supplied from one dispenser by driving the corresponding pinch roll, while the other pinch roll was kept stationary. Therefore, the steel strip switching unit requires two expensive drive sources and, accordingly, two
However, even if the mechanism is made as compact as possible, it still requires a large space and is uneconomical in terms of production costs.

[Problems that this invention attempts to solve]

As mentioned above, the original function of the steel strip switching unit is to switch the usage conditions of the steel strip.
It requires two drive sources and two pinch rolls, which is not only disadvantageous in terms of price, but also requires a lot of space.
This is an unfavorable situation from the viewpoint of application to the limited installation space of an automatic binding machine and rationalization cost, but it is possible to create a compact and inexpensive product that uses a single drive source and satisfies the function of steel strip switching. In order to realize the switching unit, the present inventor conducted extensive experiments and research, and finally completed the present invention and was able to provide an excellent automatic strapping machine with a steel strip switching unit.

[Means to solve the problem]

In order to solve the above-mentioned problem, the following measures were applied.

That is, a steel strip switching unit is provided between a bundling head that feeds, tightens, and seals the steel strip and a plurality of dispensers, and selects one of the plurality of steel strips fed out from the front and rear dispensers. In the automatic bundling machine, the steel strip switching unit is capable of coming into contact with and separating from one drive roller which is rotated forward and backward by one drive source. two presser rollers arranged symmetrically on said drive roller for respectively compressing the steel strip by contact, forming two passages for the steel strip, and on the side of said bundling head of each said passage; A steel strip clamp having one anvil having a vertically symmetrical "F"-shaped concave surface, and two pushers arranged symmetrically so as to be able to abut and separate from each of the concave surfaces of the anvil, It is provided to correspond to the two passages of the steel strip.

[Effect]

The operation of the automatic bundling machine with a steel strip switching unit of the present invention constructed as described above will be explained in detail by focusing on the particularly important operation of the steel strip switching unit of the present invention.

In order to facilitate the explanation, the explanation will be continued with reference to the drawings of the embodiments.

As can be seen in FIG. 2, there are two steel strips 1A and 1B, and the steel strip 1A is selected and sent to the bundling head 2. Then, in order to advance the steel strip 1A to the left, a drive roller 41 and a presser roller 45A are used.
The steel strip 1A is compressed by pressing the air cylinder 46A (by pressing the presser roller 45A),
At the same time pusher 49A and air cylinder 50A
At the same time, the air cylinder 50B presses the pusher 49B against the V-shaped concave surface 47B of the anvil 47 and clamps the steel strip 1B. It is something to do. Here, the drive roller 41 rotates counterclockwise to form a pinch roll 51A together with the press roller 45A pinching the steel strip 1A, and sends the steel strip 1A to the left. Of course, the driving roller 41 can also be reversely rotated (clockwise in this case) to pull back the steel strip 1A.

Now, when steel strip 1A no longer decreases due to use and is replaced with steel strip 1B of the same type, or when steel strip 1
When switching to a different type of steel strip 1B instead of steel strip A, the air cylinder 46B lifts the presser roller 45B and presses the steel strip 1B against the drive roller 41, and at the same time restores the air cylinder 46A and presses the presser roller 4.
5A is separated from the drive roller 41. Furthermore, the air cylinder 50B was restored and the pusher 49B
is pulled down to open the passage of the steel strip 1B, and at the same time, the pusher 49A is pushed down with the air cylinder 50A, and the steel strip 1A is pressed and clamped against the "F" shaped concave surface 47A of the anvil 47. Thus, if the drive roller 41 is rotated clockwise, the presser roller 4
5B to form a pinch roll 51B and steel strip 1
B is sent to the left to feed it into the binding head 2. Of course, the steel strip 1B can also be pulled back by rotating the driving roller 41 in the reverse direction (in this case, rotating counterclockwise).

In this way, the steel strips 1A to 1B and 1B to 1A can be switched extremely smoothly by a separately provided control device.

〔Example〕

A preferred embodiment will be described in detail below with reference to the drawings.

Fig. 1 shows a front view of an automatic bundling machine with a steel strip switching unit according to the present invention, which feeds the steel strip 1 to the bundling head 2. The steel strips 1B are sent from the dispenser 3B through the steel strip switching unit 4, and one strip is selected and sent as the steel strip 1.

In addition, steel strip 1A is used for dispensers 3A and 3B.
Alternatively, steel strip supply regulators 5A and 5B are respectively attached to prevent sag from occurring in 1B.

Now, FIG. 2 shows a front sectional view of the steel strip switching unit 4, and FIG.
2, 42, and this drive roller 4
1 is driven by an air motor 43 connected coaxially so as to be rotatable in forward and reverse directions. Opposing presser rollers 45A and 4 are placed above and below this drive roller 41.
5B is provided so that the steel strips 1A and 1B can be pinched and released by air cylinders 46A and 46B, respectively.
A, 51B are formed. Then, the steel strips 1A and 1B are arbitrarily switched and fed by control (the bundling head 2
) can be done.

Further, on the left side of the drive roller 41, that is, on the side of the bundling head 2, there is a concave surface 47 in the shape of an "H" above and below.
An anvil 47 having symmetrical A and 47B is provided,
On the other hand, the air cylinder 50
The steel strips 1A and 1B are arranged so as to be pressed against the anvil 47 by the steel strips A and 50B, respectively, thereby forming clamps 52A and 52B, respectively.

Regarding these components and overall operation,
As detailed in the [Effect] section.

〔effect〕

By implementing the present invention, switching of steel strips is extremely easy and smooth, and can be achieved with one drive source and one drive roller, making it compact even in the narrow space where automatic binding machines are installed. It is possible to arrange the array with low production cost,
This will greatly expand the use of automatic binding machines.

[Brief explanation of drawings]

Figures 1 to 3 of the drawings show one embodiment of the present invention, in which Figure 1 is a front view of an automatic binding machine with a steel strip switching unit, and Figure 2 is a front sectional view of the steel strip switching unit. , FIG. 3 is a view taken along the - arrow in FIG. FIG. 4 shows a conventional example 1, and is a side view corresponding to FIG. 3. 1... Steel strip, 2... Binding head, 3... Dispenser, 4... Steel strip switching unit, 5A, 5B
... Steel strip supply regulator, 41 ... Drive roller, 4
3...Air motor, 45A, 45B, 45C,
45D...presser roll, 46A, 46B, 46
C, 46D... Air cylinder, 47... Anvil, 47A, 47B... "F" shaped concave surface, 48
A, 48B... "F" shaped convex surface, 49A, 49
B... Pusher, 50A, 50B... Air cylinder, 51A, 51B... Pinch roll, 52
A, 52B... Clamp.

Claims (1)

[Scope of utility model registration request] A steel strip switching unit is provided between a bundling head that feeds, tightens, and seals the steel strip and the plurality of dispensers, and selects one strip of the plurality of steel strips fed out from the plurality of dispensers. In an automatic bundling machine configured to feed the steel strips into a bundling head, the steel strip switching unit is capable of coming into contact with and separating from one drive roller which is rotated forward and backward by one drive source, and when the steel strips come into contact with each other, Two presser rollers are provided symmetrically arranged on the drive roller to form two passages for the steel strip, for respectively compressing the steel strip, and on the side of the bundling head of each passage there are provided upper and lower rollers. 1 with a symmetrical “F”-shaped concave surface
A steel strip clamp having an anvil and two pushers arranged symmetrically so as to be able to come into contact with and separate from each of the concave surfaces of the anvil is provided corresponding to the two passages of the steel strip. An automatic binding machine with a steel strip switching unit, which is characterized by: