JPH0454887Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is designed to transport a box-shaped contents wrapped around the wrapping paper, and to produce a wrapping paper that protrudes in the shape of a rectangular tube from the opening side of the contents. a contents transfer device for a packaging machine that folds an overhanging end of the product along an opening side;
Specifically, the rotational movement of a cam fixed to the drive shaft in one direction is changed into the alternating rotational movement of a transmission wheel in both forward and reverse directions, and the wrapping paper is wrapped around the body as a result of the reciprocating movement of a pusher linked to this transmission wheel. This invention relates to folding the overhanging end of a wrapping paper, which projects in a rectangular cylindrical shape from the open side of the contents, along the open side while transporting the box-shaped contents.

<Prior Art> Conventionally, as a content transfer device for this type of packaging machine, as disclosed in Japanese Utility Model Publication No. 59-7202, for example,
A drive shaft fixed to the cam, a follower shaft that non-rotatably inserts through the bent portion of the follower joint of the cam, which is formed into a generally L-shape from the front, and an axle shaft that non-rotatably inserts through the center of the transmission wheel. The teeth are placed horizontally at intervals in parallel, facing the axle of the driven joint, and carved on the circumferential surface centered on the driven shaft, and the connecting gear is connected to the transmission wheel so that the axes of each gear coincide. The connecting gears are connected to the gears, and these connecting gears are meshed with the teeth, and as the cam rotates, the driven joint swings back and forth in a direction perpendicular to the drive shaft, and the connecting gears and the transmission wheel are rotated in the correct direction through the external teeth. Some pushers, which are connected to the transmission wheel through an endless flexible body, reciprocate by rotating alternately in opposite directions.

<Problem to be solved by the invention> However, in the content transfer device of such a conventional packaging machine, the cam and transmission wheel are arranged in parallel in a direction perpendicular to the drive shaft, with the follower shaft in between. However, there is a problem in that a large space is required for the arrangement from the cam to the transmission wheel, which increases the size of the entire device.

In view of such conventional circumstances, the present invention aims to integrate the drive shaft and the axle of the transmission vehicle.

<Means for Solving the Problems> The technical means taken by the present invention to solve the above problems is that the driven joint of the cam can be freely swung in a direction perpendicular to the drive shaft around a driven shaft parallel to the drive shaft. The drive shaft is rotatably inserted into the center of the transmission wheel. The present invention is characterized in that connecting gears are connected to the wheel so that their axes coincide with each other, and the connecting gears are meshed with the teeth.

<Operation> According to the technical means of the present invention, as the cam rotates, the driven joint and the teeth reciprocate about the driven shaft in a direction orthogonal to the drive shaft, thereby meshing with the teeth. The communication gear and transmission wheel alternately rotate in both forward and reverse directions around the drive shaft.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

In this embodiment, as shown in FIGS. 1 and 2, a sprocket 1a fixed to a drive shaft 1 is connected to a prime mover 1.
By winding the chain 1e around the sprocket 1d fixed to the output shaft 1c of the motor b, the drive shaft 1 is rotated in one direction, and the cam 2 is fixed to the drive shaft 1 in a non-rotatable manner. A drive pulley is rotatably mounted as a transmission wheel 4, and the transmission wheel 4 is linked to a pusher 12 via endless flexible bodies 8, 11 such as timing belts.

The cam 2 is a so-called front cam in which an annular cam groove 2a is recessed in a position eccentric from the center of one side of a flat plate formed in a front circular shape, and the drive shaft 1 is inserted through the center of the cam groove 2a and is fixed in a non-rotatable manner. A follower protrusion 3a of a driven joint 3, which will be described later, is slidably fitted into the cam groove 2a.

The driven joint 3 has a follower protrusion 3a that rotatably protrudes from one side of a flat plate formed in a generally fan-like shape in front and engages with the groove 2a of the cam 2, and a shaft that is opened on the main side thereof. By rotatably inserting the follower shaft 5 horizontally installed parallel to the drive shaft 1 into the hole 3b, the arc side is pivoted so as to be swingable in the direction orthogonal to the drive shaft 1, and the follower shaft 5 is inserted into the hole 3b. One side of the protruding portion 3a is connected to the cam groove 2.
A is arranged parallel to one side surface of the cam 2 having a concave shape, and the other side surface of the driven joint 3 is a transmission wheel 4, which will be described later.
and parallel to each other.

In addition, an elongated hole 3c is bored in the arcuate side of the driven joint 3, through which the drive shaft 1 is inserted movably in a direction perpendicular to the elongated hole 3c. An arcuate protrusion 3d is formed by protruding toward the transmission wheel 4 side, and this arcuate protrusion 3
Teeth 3e are carved on the circumferential surface facing the drive shaft 1 of d and centered on the follower shaft 5.

The transmission wheel 4 is rotatably attached to the drive shaft 1 by inserting the drive shaft 1 through a through hole 4a opened in the center via a ball bearing 4b, and also has a through hole 4a on the surface facing the driven joint 3. A communication gear 4c that meshes with the teeth 3e is provided protruding from the periphery so that the drive shaft 1 is at the center.

Then, an endless flexible body 8 is wound around a driven pulley 7 disposed at the upstream end of the transfer path 6 from the transmission wheel 4, and in the case of this embodiment, a protruding part is provided on the inner surface of the endless flexible body 8. The large number of teeth 8a prevent the drive pulley 4 and the driven pulley 7 from slipping.

A communication pulley 9 is coaxially connected to the driven pulley 7.
are arranged in parallel, and the endless flexible body 11 is wound from the communication pulley 9 to the U-turn pulley 10 disposed in the middle of the transfer path 6. It is connected to a pusher 12 which is disposed so as to be able to reciprocate in only one direction.

Incidentally, a plurality of types of transmission wheels 4 having different diameters are prepared in advance, and the amount of reciprocating motion of the pusher 12 can be adjusted by replacing them according to use.

Next, the operation of the contents transfer device of such a packaging machine will be explained.

First, the drive shaft 1 rotates and the cam groove 2a of the cam 2
When the following protrusion 3 of the driven joint 3 rotates, the following protrusion 3 of the driven joint 3 rotates.
a follows, the driven joint 3 reciprocates around the driven shaft 5 in a direction orthogonal to the drive shaft 1, and
The tooth 3e also reciprocates around the follower shaft 5.

As a result, the communication gear 4c that meshes with the teeth 3e rotates, and the transmission wheel 4 first rotates counterclockwise from the initial state shown in FIG. 1, and then reverses clockwise after stopping. Endless flexible body 8, 11
reciprocate intermittently.

Due to the intermittent reciprocating motion of these endless flexible bodies 8 and 11, the pusher 12 moves forward on the transfer path 7 and pushes forward the box-shaped contents A wrapped around the wrapping paper B. The overhanging end of the wrapping paper B that protrudes in a square tube shape from the open side of A,
It is folded along the open side of the contents A, and then retreated after the folding is completed.

In the above-mentioned embodiment, the cam 2 was a so-called front cam having an annular cam groove 2a recessed on one side.
It is not limited to this, and a plate cam may be used, for example. In this case, it goes without saying that the driven joint 3 is attached so as to follow the outer periphery of the plate cam.

In addition, in the illustrated example, the driven joint 3 is formed into a substantially fan shape from the front, and the drive shaft 1 is inserted into the long hole 3c on the arcuate side thereof.
At the same time, the drive shaft 1 of the arcuate protrusion 3d is opened.
Although the teeth 3e are carved on the inner surface facing the drive shaft 1, the present invention is not limited to this.
Teeth 3 are provided on the circumferential surface centered on the follower shaft 5 on this outer surface.
The driven joint 3 may be formed into a substantially inverted L-shape from the front if it is engraved with the letter e or swings close to the drive shaft 1.

<Effects of the invention> Since the present invention has the above configuration, it has the following advantages.

As the cam rotates, the driven joint and teeth swing back and forth around the driven shaft in a direction perpendicular to the drive shaft, so that the connecting gear and transmission wheel that mesh with the teeth rotate forward and backward around the drive shaft. Since it rotates alternately in both directions, the drive shaft and transmission wheel axle can be integrated.

Therefore, compared to the conventional system in which the cam and the transmission wheel are arranged in parallel in the direction perpendicular to the drive shaft with the driven node in between, the arrangement positions of the cam and the transmission wheel overlap in the direction of the drive shaft. The installation space in the direction perpendicular to the drive shaft is reduced, and the entire device can be downsized.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view of a contents transfer device of a packaging machine showing an embodiment of the present invention, Fig. 2 is a longitudinal sectional side view showing an enlarged view of the main parts, and Fig. 3 is an exploded perspective view of the main parts. be. A...Contents, B...Wrapping paper, 1...Drive shaft,
2...cam, 3...driven joint, 3e...teeth, 4...
Transmission wheel, 4c... Connection gear, 5... Follower shaft, 6...
...Transport route, 12...Putsiya.

Claims (1)

[Scope of utility model registration request] The rotational movement of the cam fixed to the drive shaft in one direction is converted into the alternating rotational movement of the transmission wheel in both forward and reverse directions, and the reciprocating movement of the pusher linked with the transmission wheel creates a box-shaped box with wrapping paper wrapped around the body. In the contents transfer device of the packaging machine, the overhanging end of the wrapping paper, which protrudes in the shape of a rectangular tube from the opening side of the contents, is folded along the opening side while the contents are being transferred. is pivoted so that it can swing freely in a direction perpendicular to the drive shaft around a follower shaft parallel to the drive shaft,
Teeth are carved on the circumferential surface around the driven shaft, facing the drive shaft of the driven joint, and the drive shaft is rotatably inserted into the center of the transmission wheel, and a connecting gear is attached to this transmission wheel. A contents transfer device for a packaging machine, characterized in that the connecting gears are arranged in series so that their axes coincide with each other, and the communication gears are meshed with the teeth.