JPS6216433Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a paper transfer device in a ticket issuing device for railways, etc., and its purpose is to eliminate paper slippage caused by idling of the paper transfer device and to ensure paper transfer with less noise. shall be.

Devices that clamp and transfer paper between a drive-side roll and a driven-side roll have been widely used, and in most of these devices, the outer diameters of the drive-side feed roll and the driven-side roll are approximately the same. Under equal conditions, flat knurling is applied to its outer periphery, and the two engage to transport the paper. However, when a large amount of information is printed within a limited area of a ticket, the driven side feed roll is inevitably forced to be smaller due to the fact that it is adjacent to the printing member. in this way,
The outer diameter of the drive-side roll is determined by the outer diameter dimension corresponding to the longitudinal dimension of the ticket, whereas the outer diameter of the driven-side feed roll is reduced due to external factors such as printing materials. , a combination of mutually different diameters. Under such conditions, if flat knurling or cross knurling is applied to both rolls, the engagement of the knurls will be inconsistent due to the difference in the number of rotations of the mutual rolls during paper transport, resulting in significant roll idling. As a result of experiments, it became clear that the accompanying noise and slippage of the paper during transport occurred. Attempts have been made to increase the pressure of the driven feed roll against the drive feed roll, but this has not had much effect, and new problems have been created, such as an increase in bearing load and an increase in the release force of the driven feed roll when loading paper. .

In addition, an analysis of the results of the above experiments revealed that if the feed rolls are combined with irises of the same pitch, the tops of the knurling crests will easily come into contact with each other, and due to the acute angle, the crests will rub against each other, causing noise and noise. It turned out to be.

The present invention seeks to solve the above-mentioned drawbacks and will be described below along with its embodiments. In the drawing, 1 is the ticket paper for railways, etc., and 2 is the predetermined length L of the ticket.
A drive-side feed roll having an outer diameter dimension corresponding to , and a flat knurling 4a on its peripheral surface, and a gear portion meshing with a feed gear 6 connected to a drive mechanism such as a motor (not shown) at its rear end. 4b is integrally provided. Reference numeral 3 denotes a feed section that is assembled with the gear section 4b by press-fitting, caulking, etc.
The feed section 3 is required to have wear resistance, and the gear section 4b has problems with workability, so the two are separated from each other due to differences in the degree of heat treatment, processing method, and process. 5 is a bearing member, 5a is a fixed shaft, and 7 is a mounting base attached to the chassis 8, which holds the fixed shaft 5a. Reference numeral 9 denotes a driven side feed roll having a cross-cut knurling 10 on its outer peripheral surface and having a smaller outer diameter than the drive side feed roll 2, and is made of a sheet metal or the like that is rotatable around a fulcrum shaft 12 and is approximately U-shaped. The lever 13 is rotatably fitted onto a support shaft 14 embedded in the end of the side wall of the lever 13. Reference numeral 11 denotes a bearing member thereof, and reference numeral 15 denotes a release lever loosely fitted onto the upper part of the lever 13. By pushing the release lever in the direction of the arrow X in FIG. It can be inserted during loading. 16 is an insertion hole for a release lever 15 provided in the chassis 8, and by inserting the release lever 15, the vehicle can be temporarily stopped. Reference numeral 17 denotes a spring that always urges the driven side feed roll 9 in the direction of arrow Z with respect to the drive side feed roll 2. Reference numeral 18 denotes a cutting device that is driven by a mechanism (not shown) after the ticket 19 has been transported by a predetermined length L by the transport means including the driven side feed roll 2 and the driven side feed roll 9. 20 is a printing member for recording predetermined information 21 on the paper 1; 22 is a receiving member for transferring the paper 1;

In such an apparatus, in order to print and record predetermined information within the longitudinal dimension L of the ticket 19 shown in FIG. . In other words, given the conditions for providing necessary information within a limited length,
The driven side feed roll must necessarily be made smaller, that is, have a smaller diameter. In order to transfer the predetermined length L of the current note 19 with one rotation of the drive side feed roll 2, D=
The outer diameter is determined by L/π. On the other hand, in order to transfer the predetermined length L, the number of revolutions of the driven side feed roll 9 increases by an amount corresponding to the smaller outer diameter of the driven side feed roll 9 for one rotation of the drive side feed roll 2. Under such conditions, if both rollers are flat-knurled, the rotation of the driven-side feed roll 9 cannot follow the instantaneous rotation start-up of the drive-side feed roll 2 due to a phase shift in paper transport.

However, in this embodiment, under the condition that the outer diameter dimensions of the drive side feed roll 2 and the driven side feed roll 9 are different, flat knurling is performed on the outer circumferential surface of the drive side roll, and cross-cut knurling is applied to the outer circumferential surface of the driven driven side roll 9. By applying the knurling, the apex of the cross-grained knurling of the driven side feed roll 9 becomes dotted compared to the flat knurling, so the pressure contact and biting force against the paper per unit area increases, causing the paper to slip. do not have. Further, by forming the driving side feed roll 2 with a flat knurling, the accuracy of the transfer length, that is, the accuracy of the outer diameter dimension, can be easily improved compared to the case where the drive side feed roll 2 is provided with a cross knurling.

Furthermore, as shown in FIG. 9, by making the apex pitch _P1 of the cross-grained knurling 10 of the driven-side feed roll 9 different from the pitch P2 of the flat knurling 4a of the driving-side feed roll ₂ , it is possible to Slip caused by collision of the knurling vertices is significantly reduced, resulting in a more reliable and stable transfer device.

As is clear from the above embodiment, the present invention has a configuration in which one feed roll is provided with a flat knurling, and the other opposing feed roll has a different diameter to form a cross-cut knurling, with each knurl having a different pitch. Therefore, the apex of the cross stitch knurling enters the groove of the fillet knurling, increasing the biting force into the paper, preventing slipping during paper transport, and moreover, the meshing of the knurls matches and the roll idles. This has the effect of allowing quiet operation without any noise.

[Brief explanation of the drawing]

Fig. 1 is a front view of a paper transport device according to an embodiment of the present invention, Fig. 2 is a sectional view of the same side, Fig. 3 is a side view of the driven side feed roll, and Fig. 4 is a side view of the drive side feed roll. , Fig. 5 is a configuration diagram of the ticket, Fig. 6 is a developed plan view of the cross-shaped knurling, Fig. 7 is a perspective view of the main part, Fig. 8 is a partially enlarged perspective view of the flat knurling, and Fig. 9 is a partially enlarged perspective view of the flat knurling. A schematic diagram of the structure of the cross-shaped knurling and the flat knurling is shown. 1...Paper, 2...Drive side feed roll, 9...
Driven side feed roll.

Claims (1)

[Scope of utility model registration request] a paper transfer device main body that pinches and transfers paper between a driving side feed roll and a driven side feed roll;
A drive-side feed roll that is housed in the paper transfer device main body and has a flat knurling on its circumferential surface, and a cross-hatched knurl that is housed in the paper transfer device main body and has a diameter different from that of the drive-side feed roll. , a driven-side feed roll having a pitch different from that of the flat knurling, and the apex of the crosswise knurling enters the groove of the fillet knurling to increase the biting force on the paper, thereby increasing the slippage of paper transport. A paper transport device characterized in that the knurlings are meshed with each other to prevent rolls from idling and operate quietly.