JPH0628509Y2 - Mail carrier - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a mail conveying device for use in a mail processing machine for separating and conveying a large number of mails one by one.

[Conventional technology]

The postal processing machine needs to carry out the processing work while separating a large number of postal items one by one and carrying them to the next step, and the carrying device used for this purpose is generally a carrying mechanism using a friction belt. It is adopted.

A conventional conveying mechanism using this type of friction belt has a structure as shown in FIG. That is, in FIG. 3, the suction belt 21 has a plurality of holes provided at a predetermined pitch and is wound around a drive roller 22 and an idler roller 23 whose movements are controlled from the outside,
The operation speed of the suction box 24 is controlled so that the postal matter is adsorbed through the hole and conveyed one by one in the direction of arrow C while maintaining a predetermined interval. At a position facing the suction box 24 with the suction belt 21 interposed therebetween, a drive roller 26 rotating at a constant speed is provided.
, The idler roller 27, and the friction belt 2 that revolves in the direction (arrow D) opposite to the direction in which the mail is conveyed (arrow C)
8 are provided. The friction belt 28 is used for the suction belt 2 when two or more pieces of mail are overlapped and fed.
For advancing the first mail piece in contact with 1 in the direction of arrow C and stopping the progress of the second mail piece and thereafter until the first mail piece passes. It is a thing. Since the idler roller 27 is rotatable about the drive roller 26 in the direction of arrow A, the suction belt 21 corresponds to the size of the mail to be conveyed.
The distance S between the friction belt 28 and the friction belt 28 can be changed. However, even if the friction belt 2 wears and the interval S gradually increases, the stopper 25 is fixed, and therefore the amount of wear cannot be automatically corrected.
It will no longer be possible to separate and transport the items one by one. Therefore, it is necessary to constantly measure the interval S and set it to a predetermined value.

[Problems to be solved by the invention]

As described above, in the conventional mail conveying device, since the distance S between the friction belt and the suction belt gradually increases as the friction belt wears, it is necessary to adjust the distance each time and it is always stable at a constant distance. There is a drawback that it is difficult to carry out the carrying operation.

An object of the present invention is to eliminate the above-mentioned drawbacks of the conventional mail conveying device and to always maintain a constant distance between the suction belt and the friction belt.
An object of the present invention is to provide a mail delivery device capable of stably delivering mail.

[Means for Solving the Problems] In the mail conveying device of the present invention, the detection roller is kept in contact with the wear surface on the outer side of the friction belt, and when the friction belt wears, the friction belt has a size equal to the wear amount It has a link mechanism that is configured to move the roller that winds around the suction belt toward the suction belt so that the surface of the friction belt at the position where it contacts the mail is automatically corrected to the position that was initially set. There is.

That is, the mail transfer device of the present invention has a plurality of holes provided at a predetermined pitch and is driven to rotate in the mail transfer direction by the first idler roller to transfer the mail. A suction belt, a suction box disposed inside the suction belt at a position corresponding to a portion for transporting the postal matter, and adsorbing the postal matter through the suction belt, and the suction belt near the suction box. A second idler roller provided at a facing position and a friction belt that is driven in the opposite direction to the moving direction of the suction belt by a second drive roller whose rotation is controlled from the outside, and an outer side of the friction belt. A detection roller that comes into contact with the surface of the friction belt at a constant pressure and moves due to wear of the friction belt; A first support shaft that rotatably supports an idler roller and sets a gap between the suction belt and the friction belt; and a pressing mechanism portion having a spring that presses the second idler roller in the direction of the suction belt. A first arm that is rotatably supported by the first support shaft and holds the second idler; and a first arm that is rotatably supported by the second support shaft and holds the detection roller at a central portion. A link mechanism formed of a support plate and a second arm provided between the tip of the first arm and the tip of the support plate; the first arm and the second arm; It comprises a stopper roller provided at a connecting point with the arm and a stopper for restricting the movement of the stopper roller.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, a suction belt 1 is wound around a drive roller 2 and two idler rollers 3 whose movements are controlled from the outside, and suctions a postal matter 5 by a suction box 4 to set a predetermined amount one by one. At a position facing the suction box 4 with the suction belt 1 sandwiched between them, the operation speed of which is controlled so as to convey them in the direction of arrow C while keeping the interval, the drive roller 6 and the idler roller 7 rotating at a constant speed are provided. There is provided a friction belt 8 that is wound around and moves in a direction (arrow D) opposite to the conveying direction (arrow C) of the postal matter 5. Since the idler roller 7 is rotatable about the drive roller 6 in the direction of the arrow A, the distance S between the suction belt 1 and the friction belt 8 corresponds to the thickness of the conveyed postal matter. Can be changed. Further, a pressing mechanism having a spring 9 is provided so that the pressing force (in the direction of arrow B) on the postal matter 5 becomes constant. A detection roller 10 is provided in the vicinity of the driving roller 6 to detect the amount of wear of the friction belt 8 by lightly contacting the outer peripheral surface of the friction belt 8. The detection roller 10 is held at a central portion of a support plate 16 capable of rotating around its support shaft 11 so as to come into contact with the outer peripheral surface of the friction belt 8. An arm 12 rotatably attached to the tip of a support 16 for holding the detection roller 10, an arm 14 rotatably supported by a support shaft 13 for holding the idler roller 7, an arm 12, and a support plate 16. And constitute a four-bar linkage, and a stopper roller 15 is provided at the point where the arm 12 and the arm 14 intersect (see FIG. 2). The stopper roller 15 contacts the stopper 18 provided on the plate 17 to restrict the idler roller 7 from rotating more than a predetermined angle in the clockwise direction of the arrow A about the drive roller 6 as a fulcrum. The counterclockwise rotation of the arrow A of the stopper roller 15 is unlimited. When the friction belt 8 wears, the detection roller 10 moves in accordance with the wear amount, so that the stopper roller 15 acts in the direction of the arrow E by the same amount as the wear amount because the detection roller 10 moves according to the wear amount.
Follows this and works in the direction of arrow B, so that the interval S can always be maintained at a constant dimension.

[Effect of device]

As described above, in the mail conveying apparatus of the present invention, the detection roller is brought into direct contact with the outer surface of the friction belt to be worn, and thereby the gap between the suction belt and the friction belt is tracked according to a slight amount of wear. There is an effect that it can be maintained at a constant value at all times, and therefore there is an effect that a stable operation of conveying a mail piece can be performed.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, and FIG.
FIG. 3 is a plan view showing details of the link mechanism of the embodiment shown in FIG. 3, and FIG. 3 is a plan view showing an example of a main part of a conventional mail conveying device. 1.21 ... Suction belt, 2.62 / 22/26 ... Drive roller, 3.72 / 23/27 ... Idler roller, 4 /
24 ... Suction box, 5 ... Postal item, 8.28 ... Friction belt, 9.29 ... Spring, 10 ... Detection roller,
11.13 ... indicating shaft, 12/14 ... arm, 15 ... stopper roller.

Claims (1)

[Scope of utility model registration request] 1. A rotary motion is driven in the conveying direction of a mail by a first drive roller and a first idler roller which have a plurality of holes provided at a predetermined pitch and whose rotational drive is controlled from the outside. A suction belt that conveys the postal matter, a suction box that is disposed at a position corresponding to a portion that conveys the postal matter inside the suction belt and that adsorbs the postal matter through the suction belt, and the suction A friction driven in a direction opposite to the moving direction of the suction belt by a second idler roller provided in a position facing the suction belt in the vicinity of the box and a second drive roller whose rotational operation is controlled from the outside. The belt is in contact with the outer surface of the friction belt at a constant pressure and is moved by abrasion of the friction belt. A first support shaft that rotatably supports the second idler roller to set the distance between the suction belt and the friction belt, and presses the second idler roller in the direction of the suction belt. A pressing mechanism having a spring, a first arm rotatably supported by the first support shaft and holding the second idler, and a center rotatably supported by the second support shaft. A support plate that holds the detection roller in a portion, and a link mechanism section that is formed by a second arm provided between the tip of the first arm and the tip of the support plate; A mail transfer device comprising: a stopper roller provided at a connection point of one arm and the second arm; and a stopper for restricting movement of the stopper roller.