JPS6343117Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a flap creasing device for an envelope sealing machine. This invention relates to an improvement in a device for creasing the flap portion of a flap.

[Prior Art] In an envelope sealing machine, many devices have been proposed in the past as means for creasing the flap portion of an envelope and raising the flap in the folding direction of the envelope body, and some of them have not been put to practical use. ing. The inventor of the present invention has also already invented an envelope sealing machine equipped with a new flap creasing device, which was published in a patent application.
A patent application was filed as No. 57-233067. The flap creasing device will be explained below with reference to the drawings.

FIG. 1 is an explanatory cross-sectional view of the envelope sealing machine according to the invention, and FIG. 2 is an explanatory diagram of a sealing mechanism including a flap creasing device provided in the machine.
In FIG. 1, 10 is a conveyance mechanism, 20 is a gluing mechanism, and 30 is a sealing mechanism. The transport mechanism 10 is
The belt 12 includes a pair of conveyor pulleys 11 arranged at a certain distance apart from each other in a direction perpendicular to the plane of the figure, and a belt 12 stretched between them, and the belt 12 is located at a position corresponding to the gluing mechanism 20 on the near side of the plane of the figure. A pressure roller (not shown) is arranged above. belt 12
At the position shown in the drawing near the center of the support frame 14
There is a cylindrical body 15 attached to the cylindrical body, and a sphere 16 having an appropriate weight is housed inside the cylindrical body, and the lower part thereof is exposed through a circular hole 17 at the bottom of the cylindrical body, and is pressed against the surface of the belt 12 by its own weight. There is. The sealing mechanism 30 is composed of a creasing section 30a, a folding guide section 30b, and a flap crimping section 30c. The creasing portion 30a includes a rotor 31 and an elastic roller 34 pressed by a pressure spring 35, and the rotor 31 has a shape in which a portion is notched along the axial direction, and the notch portion A blade-shaped protrusion 32 is attached to one side of the blade, and the peripheral surface other than the notch is covered with a friction member 33. Normally, the envelope E is stationary at the position shown in FIG.
A crease is made on the flap part of the flap. The folding guide section 30b consists of a pair of upper and lower guide plates 36, and when an envelope that has been creased in the manner described above is sent, the folding guide section 30b serves to further fold the flap toward the envelope body. The flap crimping unit 30c consists of a lower crimping roller 37 that rotates continuously and an upper crimping roller 38 that is pressed by a pressing spring 39, and crimps the glued flap part and the envelope body at once. At the same time as sealing, the sealed envelope is discharged onto the receiving table 18.

The envelope sealing machine described above changes the conveyance direction of the envelope at right angles within the same plane in the process of gluing the flap and the sealing process, making the machine compact. Since the process is performed over the entire width of the flap at once, it is extremely superior in that there is no bending of the folds or misalignment of the seal. However, in this envelope sealing machine, changing the envelope conveying direction is possible by using the blade-shaped protrusion 32.
This is done when the edge of the blade comes into contact with the elastic roller 34, so in the case of envelopes made of thin Hatron paper or double envelopes with thin paper inside, the glued flap part There was a serious drawback in that the impact caused by the creasing caused the blade to stick to the surface of the blade-shaped protrusion 32, and then be caught in the rotation of the rotor 31, resulting in an accident.

[Purpose of the invention] The present invention eliminates the above-mentioned drawbacks of known envelope sealing machines, and provides a creasing device in which the flap part does not stick to the surface of the blade-shaped protrusion even in the case of envelopes using thin paper. The purpose is to provide

[Structure of the invention] In order to achieve the above object, the present invention provides an apparatus for creasing the flap portion of an envelope by the cooperation of a rotor equipped with blade-shaped protrusions and an elastic roller as described above. A pin was provided protrudingly below the blade edge of the blade-shaped protrusion.

[Embodiment of the invention] FIG. 3 is a partially omitted perspective view showing a rotor according to an embodiment of the invention, and the same parts as in FIG. 2 are given the same reference numerals. As shown in the figure, the blade-shaped protrusion 3
2 is a rotor 3 together with a seat plate 40 having a pin 41.
1, and the pin 41 is screwed to the blade-shaped protrusion 3.
It is provided below the blade edge of No. 2 to protrude in the rotational direction of the rotor 31. Figure 4A shows the pin 41 shown in Figure 3.
FIG. 4B is an enlarged perspective view showing a pin 41 having a different shape. As seen in the enlarged view, the tip of the pin 41 is slightly rounded to prevent it from biting into the paper and getting caught. Further, instead of attaching the pin 41 with the seat plate 40, a small diameter hole may be bored in the blade-shaped protrusion 32 and the thin pin 41 may be directly implanted in this hole.
Alternatively, it may be attached by brazing or the like.

[Effect of the invention] In the flap creasing device of the present invention, since the pin 41 is provided protruding below the blade edge of the blade-shaped protrusion 32, the rotor 31 does not impact the elastic roller 34 when creasing the flap. Even if the flap comes into contact with the flap, the adhesive surface of the flap is completely prevented from sticking to the surface of the blade-shaped protrusion 32 due to the momentum. Therefore, even in the case of envelopes made of thin Hatron paper or double envelopes with thin paper on the inside, serious accidents such as envelopes getting caught in the rotor 31 do not occur, and the sealing machine can be used reliably. It has a tremendous effect on improving sexuality.

[Brief explanation of the drawing]

Fig. 1 is an explanatory cross-sectional view of the envelope sealing machine according to the invention of Japanese Patent Application No. 57-233067, Fig. 2 is an explanatory view of the sealing mechanism including the flap creasing device provided in the machine, and Fig. 3 4A is a partially omitted perspective view showing a rotor according to an embodiment of the present invention, and the same parts as in FIG. 2 are given the same reference numerals, and FIG. FIG. 4B is an enlarged perspective view showing pins of different shapes. 10...Transportation mechanism, 20...Gluing mechanism, 30
... Sealing mechanism, 30a ... Creasing section, 30b...
...Guide part, 30c...Flap crimping part, 32...
...Blade-shaped protrusion, 40...Seat plate, 41...Pin.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a device that creases the flap portion of an envelope by the cooperation of a rotor equipped with a blade-shaped protrusion and an elastic roller, the lower part of the blade edge of the blade-shaped protrusion 32 is provided. A flap creasing device for an envelope sealing machine, characterized in that a pin 41 is provided protruding from the flap. (2) The pin 41 is attached to the blade-shaped protrusion 3 along with the seat plate 40.
2. A flap creasing device for an envelope sealing machine as set forth in claim (1) of the utility model registration, which is screwed to the flap creasing device of the envelope sealing machine. (3) The flap creasing device for an envelope sealing machine according to claim (1), wherein the pin 41 is directly planted on the blade-shaped protrusion 32.