JPH0423656Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of application of the invention] This invention is a paper feeding device of a printer, particularly for feeding continuous paper (perforation) with perforations in the side edges to the printer. The present invention relates to a paper feeding device that can

[Background of the idea]

Conventionally, this type of paper feeding device is equipped with a microswitch in order to detect the presence or absence of recording paper and to prevent blank firing between the printing device and the platen, which occurs when the recording paper is used up. 1st
The figure shows a means for installing a microswitch in a conventional paper feeding device. In this figure, A is the slide block, B is the pin belt, C is the sprocket wheel that drives the pin belt, D is the paper feeding surface that transfers the recording paper to the pin belt B, E is the micro switch, and F is the top surface of the slide block. The cover is placed at , and G indicates the recording paper.

This paper feeding device has a wide groove I formed in the lower surface of the cover F as a relief groove for the actuator H of the microswitch E, so if paper with low rigidity is used as the recording paper, There is a drawback that the elasticity of the actuator H causes the edges of the recording paper to sag, causing the microswitch E to malfunction.

[Purpose of invention]

The present invention was devised in view of the above, and the purpose is to provide a highly reliable paper feeding device in which the micro switch operates reliably no matter what type of recording paper is used. do.

[Summary of the idea]

In order to achieve the above-mentioned object, the present invention provides a paper feeding device for a printer equipped with a pin belt for transporting continuous paper having feeding holes, in which a horizontal plate portion of a fixed cover is installed above a slide block to which the pin belt is attached. A movable cover rotatably held by the fixed cover is arranged one after the other along the paper feeding direction, and a lower surface of the horizontal plate portion of the fixed cover and a lower surface of the movable cover are provided with a movable cover that is rotatably held in the paper feeding direction. At least two parallel ribs are provided protruding at the same height so that only the tips of the ribs come into contact with the recording paper, and the slide block is provided with the recording paper transferred by the pin belt. A micro switch is disposed below the paper feeding surface, and the actuator of the micro switch is positioned between two ribs protruding from the lower surface of the horizontal plate portion of the fixed cover.

[Example of idea]

Next, one embodiment of the present invention will be described based on the following drawings.

FIG. 2 is an exploded perspective view of the left paper feeding device of the paper feeding device according to the present invention, in which 1 is a slide block, 2 is a main sprocket wheel, and 3 is a
is the sub sprocket wheel, 4 is the pin belt,
5 is an outer plate, 6 is a fixed cover, 7 is a movable cover,
8 indicates a micro switch. As shown in FIGS. 2 and 3, the slide block 1 includes a paper feed table 9, a paper press plate 10, a side plate 11, and a mounting portion 1.
2, a bearing plate 13, a mounting rod 14 for attaching the outer plate 5 and the fixed cover 6, a locking plate 15 for locking the fixed cover 6, and a positioning plate 16 for regulating the setting position of the outer plate 5. , a mounting rod 17 to which the micro switch 8 is attached, and a locking piece 18 are integrally formed. As shown in FIG. 4, the paper feed table 9 and the paper press plate 10 are formed in parallel with each other with a paper groove 19 having a width sufficient to insert the recording paper therebetween. Reference numeral 20 denotes a slope formed on the paper feeding side of the paper pressing plate 10, and forms a wide paper feeding port 21 which continues to the paper groove 19 between the paper pressing plate 10 and the paper feeding table 9. The shaft hole 22 of the main sprocket wheel 2 is formed on the side plate 11 side of the mounting portion 12.
An insertion hole 23 through which a sprocket drive shaft (to be described later) is inserted is provided coaxially with the shaft hole 22 on the side of the outer plate 12a. A shaft hole 24 for the sub-sprocket wheel 3 is formed in the bearing plate 13 . The mounting rod 14 and the locking piece are provided on the outer surface of the side plate 11 so as to protrude in parallel with each other at a required interval. The positioning plate 16 is formed to be slightly wider than the width D of the pin belt 4. Mounting rods 17 for mounting the micro switch 8 are provided in parallel with each other on the inner surface of the side plate 11 at equal intervals to the mounting holes 25 formed in the micro switch 8. Reference numeral 26 indicates a locking step formed on the mounting rod 17. Locking pieces 18 for locking the microswitch 8 are provided on both sides of the mounting rod 17 in parallel with each other and projecting from both sides of the mounting rod 17 at an interval equal to the width W of the microswitch 8. The reference numeral 27 is a switch groove from which the actuator 8a of the micro switch 8 protrudes, which is cut out in the paper feed table 9, and the reference numeral 28 is a switch groove from which a part of the paper feed roller (to be described later) is protruded from the upper surface of the paper feed table 9. It's a groove.

The main sprocket wheel 2 has rotary shafts 2a and 2b coaxially protruding from both sides thereof, and a square hole 29 is formed in the rotary shafts 2a and 2b through which a drive shaft (to be described later) passes.

A paper feed roller 30 is integrally fixed to one side of the sub sprocket wheel 3, and rotating shafts 3a and 3b are coaxially attached to the side surface of the paper feed roller 30 and the side surface of the sub sprocket wheel 3, respectively. It is installed protrudingly. Reference numeral 31 is the paper feed roller 3
The knurling made on the surface of 0 is shown.

The pin belt 4 has protrusions 4a projected at equal intervals on its inner circumferential surface to engage with the sprocket wheels 2 and 3, and its outer circumferential surface has feed holes provided on both sides of the recording paper to be supplied to the printer. Pins 4b are provided protrudingly at equal intervals.

The outer plate 5 has a through hole 3 through which a mounting rod 14 protruding from the side plate 11 of the slide block 1 passes.
2. A through hole 33 through which the locking piece 15 protruding from the side plate 11 of the slide block 1 is passed through, a shaft hole 34 that pivotally supports the rotating shaft 2b of the main sprocket wheel 2, and the sub sprocket. The shaft hole 35 that supports the rotating shaft 3b of the wheel 3 is
Each will be established at the required location.

As shown in FIGS. 5 and 7, the fixed cover 6 consists of a horizontal plate 36 and a side plate 37.
A through hole 38 through which the mounting rod 14 protrudingly provided on the side plate 11 of the slide block 1 is passed through, and a locking piece 1 protrudingly provided on the side plate 11 of the slide block 1.
A keyhole 39 is opened in which the key 5 is engaged. keyhole 39
As shown in FIG. 6, the engagement surface 15 of the locking piece 15
A surface 39a that engages with the engaging surface 15a is formed as an inclined surface having the same slope as the engaging surface 15a. code 40
indicates a rib protruding from the lower surface of the horizontal plate 36. When the fixed cover 6 is attached to the slide block 1, the actuator 8a of the micro switch 8 forms two adjacent ribs 40,
40. Reference numeral 41 denotes a mounting portion of a movable cover to be described later, in which a shaft hole 42 penetrating left and right is opened.
A flat portion 43 is formed on the front edge, and an engagement step 44 is formed on the lower edge. Reference numeral 45 indicates an escape groove of the movable cover 7, which will be described later.

The fixed cover 6 is attached to the base end of the movable cover 7.
A coupling part 46 is fitted into the escape groove 45 of the movable cover mounting part 41 and is pivotally supported by the movable cover attachment part 41, and an engaging element 47 is provided on the outer surface of the coupling part 46 extending from the lower surface of the movable cover 7.
Reference numeral 48 denotes a rib protruding from the lower surface of the movable cover 7, which is connected in series with the rib 40 protruding from the lower surface of the horizontal plate 36 when the movable cover 7 is attached to the fixed cover 6. It is formed at the location where it is located.

Next, a method of assembling the paper feeding device composed of the above-mentioned members will be explained.

The rotating shaft 2 of the main sprocket wheel 2 is inserted into the shaft hole 22 formed in the mounting part 12 of the tractor body 1.
a, and the bearing plate 1 of the tractor body 1.
The rotating shaft 3a of the sub sprocket wheel 3 is fitted into the shaft hole 24 formed in the sprocket wheel 3. Subsequently, the pin belt 4 is mounted on the main sprocket wheel 2 and the sub sprocket wheel 3 set on the tractor main body 1 as described above. continue,
A mounting rod 1 protruding from the side plate 11 of the tractor body 1
4 is fitted into the through hole 32 formed in the outer plate 5, and the rotating shaft 2b of the main sprocket wheel 2 is fitted into the shaft hole 34 formed in the outer plate 5. The rotating shaft 3b of No. 3 is fitted into the shaft hole 35 formed in the outer plate 5. Finally, the through hole 38 of the fixed cover 6, in which the movable cover is rotatably mounted in advance, is fitted into the mounting rod 14 protruding outward from the outer plate 5, and the tractor Press the main body 1 side to engage the engagement surface 15a of the locking piece 15 with the keyhole 39.

Although a detailed explanation will be omitted, the right paper feed device is also formed in exactly the same manner as the left paper feed device described above, except that no microswitch is provided.

In the above embodiment, a paper feeding device for a printer is described which is equipped with both a pin belt that transports continuous paper with a feed hole in the side edge and a paper feed roller that transports roll paper that does not have a feed hole. However, the gist of the present invention is not limited to this, and can be implemented in exactly the same way even with a pin belt only.

[Effect of idea]

As described above, the present invention is configured such that at least two ribs are provided on the lower surface of the fixed cover in parallel with the direction in which the recording paper is transported, and the edges of the recording paper are supported by these ribs. Therefore, the rigidity of the recording paper is improved, and even when recording paper with low rigidity is used, the microswitch operates reliably. As a result, it is possible to provide a highly reliable paper feeding device that can use recording paper of a wide range of paper qualities and is highly versatile. Further, since only the tips of the ribs parallel to the paper feeding direction come into contact with the recording paper, a smooth paper feeding operation can be realized with less load during paper feeding. In addition, a fixed cover and a movable cover are provided, and the micro switch actuator is positioned between the ribs on the fixed cover side, so even if the movable cover is opened when paper is loaded, the micro switch actuator will not be exposed to the outside. This eliminates the possibility of the switch actuator being damaged due to carelessness or tampering, increasing reliability by preventing malfunctions due to damage, and eliminating the need to be concerned about the presence of the switch actuator when loading paper. This also makes it easier to load paper. Furthermore, ribs parallel to the paper feeding direction are provided on the horizontal plate portion of the fixed cover and the lower surface of the movable cover, which are arranged one after the other along the paper feeding direction, so that the recording paper can be placed at the entrance of the pin tractor mechanism. Paper with low rigidity (thin paper)
Even in the case where the paper is used, it is possible to suppress the flapping of the paper in the vertical direction, and it is possible to guarantee even more stable paper feeding and operation of the micro switch.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional paper feeding device, Fig. 2 is an exploded perspective view of the paper feeding device according to the present invention, Fig. 3 is an exploded perspective view showing the combination of a slide block and a micro switch, and Fig. 4 is an exploded perspective view of the paper feeding device according to the present invention. FIG. 5 is a front view of the fixed cover, FIG. 6 is a sectional view of the keyhole portion of the fixed cover, and FIG. 7 is a sectional view showing the positional relationship between the recording paper and the micro switch on the fixed cover. be. 1...Slide block, 2...Main sprocket wheel, 3...Sub sprocket wheel, 4...Pin belt, 5...Outer plate, 6...Fixed cover, 7...Movable cover, 8...Micro switch , 9...Paper feed stand, 10...Paper presser plate, 1
9... Paper groove, 40... Rib.

Claims (1)

[Scope of utility model registration request] In a paper feeding device for a printer equipped with a pin belt that transports continuous paper having feeding holes, a horizontal plate portion of a fixed cover and a movable plate rotatably held by the fixed cover are arranged above a slide block to which the pin belt is attached. covers are disposed one after the other along the paper feeding direction, and at least two ribs are provided on the lower surface of the horizontal plate portion of the fixed cover and the lower surface of the movable cover in parallel to the paper feeding direction. are respectively protruded at the same height so that only the tips thereof come into contact with the recording paper, while a micro switch is disposed on the slide block below the paper feeding surface of the recording paper transferred by the pin belt. A paper feeding device for a printer, characterized in that the actuator of this microswitch is positioned between two ribs protruding from the lower surface of a horizontal plate portion of a fixed cover.