JPS6345309Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a paper-feeding recorder, and more specifically, to a device for preventing roll-shaped recording paper from falling off, which is replaceably set in the housing of the recorder.

In recent years, various devices have been developed that can accurately record instantaneous high-speed phenomena in objects under test, but paper-feeding devices can feed paper at speeds of 50 to 200 cm per second in a high-speed range. It is. In this high-speed paper feed, the roll of recording paper is stopped rapidly at the end of the measurement to prevent the recording paper from becoming loose, but if this is done, the roll of recording paper may fall off from the designated bearing member due to the reaction. There is a risk that it will happen. For this reason, conventionally, the rotating shaft of the roll of recording paper is held down by, for example, a leaf spring, but this not only applies extra frictional force to the rotating shaft, impeding smooth rotation, but also prevents the roll of recording paper from rotating smoothly. It was difficult to replace them quickly.

Therefore, the purpose of this invention is to provide a recording paper having a device for preventing roll-shaped recording paper from falling off, which can securely hold a roll-shaped recording paper without applying an unnecessary load, and also enable the roll to be easily replaced. The aim is to provide a meter.

Hereinafter, embodiments of this invention will be described in detail with reference to the accompanying drawings.

Figures 1 and 2 are views of the roll recording paper fall prevention device seen from inside the housing of this recorder.
Each of these figures shows a different operating state. This recorder includes a pair of left and right roller support frames 12 that pivotally support a paper feed roller 11. Although only one roller support frame 12 is shown in these figures, this roller support frame 12 is rotatably supported via a rotation shaft 13 to a side plate 14 that constitutes the housing of this recorder. ing. Incidentally, sprockets (not shown) are provided at both ends of the paper feed roller 11, and these sprockets feed the recording paper P to the front of the housing, that is, to the left in FIGS. 1 and 2. Further, on the inner wall surface of the side plate 14, a first holding member 17 is provided which removably supports the roll-shaped recording paper 15 shown by the imaginary line via a rotating shaft 16 provided at its rotation center. ing. In this embodiment, the first holding member 17 is made of a metal or synthetic resin plate having a bearing groove 18 opened toward the front so as to receive the above-mentioned rotating shaft 16. In this invention, during the recording operation, the rotating shaft 16 of the roll-shaped recording paper 15 is restrained so as not to fall out of the bearing groove 18, and on the other hand, when the roll is replaced, the restraint is released and the rotating shaft 16 of the roll-shaped recording paper 15 is A roll-shaped recording paper drop-off prevention device 20 is provided which pulls down the paper feed roller 11 to a lower non-operating position. That is, this device 20 has a roller support frame 12
The first link 21 is attached to the end opposite to the rotational support shaft 13, and the second link 22 has one end connected to the first link 21.
In this case, the second link 22 consists of a substantially dogleg-shaped bell crank that is pivotally supported on the outside of the side plate 14 via a rotating support shaft 23, and the other end is attached to the side plate 14.
A first stopper pin 2 protrudes inside the side plate 14 through a slit opening 24 formed in the first stopper pin 2.
5 is provided. Further, the second link 22 has an integrally connected operating lever 26, and when this operating lever 26 is moved counterclockwise, the first link 21 and The paper feed roller 11 is lifted to the upper operating position via the support frame 12, and the first stopper pin 25 is set in a position where it closes the bearing groove 18 of the first holding member 17, while the operating lever 26 is turned clockwise. 2, the paper feed roller 11 is pulled down to its inoperative position, and the first stopper pin 25 is also rotated clockwise to move into the bearing groove described above. 18 openings are opened. Furthermore, in this embodiment, as shown in detail in FIG. 3, the second link 22 has a second stopper pin 27 disposed coaxially with the first stopper pin 25 on the opposite side thereof. A second retaining member 29 is mounted on the outside of the side plate 14 and has an engaging groove 28 which cooperates with the second stopper pin 27 in connection therewith. In this case, the second holding member 2
9, the second stopper pin 27 is arranged along the tangential direction of the virtual arc, and as described above, the second stopper pin 27 faces the second stopper pin 27.
When the stopper pin 25 closes the bearing groove 18 of the first holding member 17, the second stopper pin 27 is fitted into the engagement groove 28. The reference numeral 30 includes a recording needle 31 made of, for example, a discharge electrode, which is arranged to lightly touch the surface of the paper feed roller 11 when it is in the working position shown in FIG. 1, and also includes a housing (not shown). This is a recording unit fixed to the side of the body. Also,
A braking mechanism (not shown) is operatively connected to the rotating shaft 16 of the roll-shaped recording paper 15 when the roll-shaped recording paper 15 is inserted into the bearing groove 18 . When the vehicle comes to a stop, the brake mechanism applies rapid braking almost synchronously with the vehicle. Further, although not shown in detail in the drawings, a bearing is fitted to the rotating shaft 16, and the first stopper pin 25 contacts the outer ring of the rotating shaft 16, and the first stopper pin 25 contacts the outer ring of the rotating shaft 16 and extends the rotating shaft 1 from the bearing groove 18.
6 from falling off.

Next, the operation of this invention will be explained. As mentioned above, FIG. 1 illustrates a state in which the operating lever 26 is rotated counterclockwise to set the recorder in the operating state. That is, the paper feed roller 11 is lifted to the upper operating position where it approaches the recording needle 31 via the support frame 12 and the first link 21, and in conjunction with this, the first stopper pin 25 is moved to the first holding member 17. bearing groove 1
8 is rotated to a position opposite to the rotating shaft 16 of the roll-shaped recording paper 15 inserted into the recording paper 8 . At this time, since the second stopper pin 27 is fitted into the engagement groove 28 of the second holding member 29, there is no possibility that the falling-off prevention device 20 will come off inadvertently due to an external impact or the like. There aren't many. Rolled recording paper 1
The recording paper P supplied from 5 is passed between the recording needle 31 and the paper feed roller 11 so as to come into contact with the recording needle 31, and is drawn out forward. Here, if the paper feed roller 11 is rotated by a pulse motor (not shown) to continuously feed the recording paper P at high speed, and the pulse motor is stopped while the rolled recording paper 15 is rotating at high speed, the above-mentioned As described above, the roll-shaped recording paper 15 is rapidly stopped almost synchronously with the braking mechanism (not shown), but in this invention, the rotating shaft 16 is held down by the first stopper pin 25. Therefore, the roll recording paper 1 is
5 will fall out of the bearing groove 18 of the first holding member 17. Note that in order to further reduce the frictional force of the rotating shaft 16 due to contact with the first stopper pin 25 when feeding the recording paper P, a bearing may also be attached to the first stopper pin 25. On the other hand, when replacing the rolled recording paper 15, the operating lever 26 can be moved clockwise. That is, when the operating lever 26 is rotated in this way, as shown in FIG.
The stopper pin 25 moves downward in an arc centered on the rotational support shaft 23 to open the bearing groove 18, and the second stopper pin 27 is also removed from the engagement groove 28 at the same time. Further, the paper feed roller 11 is lowered to a lower non-operating position via the support frame 12 and the first link 21. As a result, the empty roll is taken out from the front of the housing, and a new roll of recording paper 15 is placed on the holding member 1.
7 can be easily installed. In this case, since the paper feed roll 11 has been pulled down as described above, the newly loaded roll recording paper 1
The recording paper P fed out from the recording paper P can be easily pulled out through the space between the paper feed roller 11 and the recording needle 31. Then, by moving the control lever 26 counterclockwise again, the recorder is set to the operating state shown in FIG.

As is clear from the description of the embodiments described above, according to this invention, it is possible to reliably hold the roll of recording paper without placing any unnecessary load on the rotating shaft of the roll of recording paper. By operating the lever, the roll of recording paper can be made replaceable. In particular, since the paper feed roller is configured to be pulled down to a lower, inoperative position in relation to the lever operation, the recording paper fed out from a new roll of recording paper is wound around the paper feed roller. is easy and extremely practical.

In the above embodiment, the stopper means made of a pin member was explained, but instead of the first stopper pin 25, for example, a plate-shaped body formed to close the opening of the bearing groove 18 may be used as the stopper means. good.

[Brief explanation of the drawing]

FIGS. 1 and 2 are schematic side views for explaining an embodiment of the invention in different operating states, and FIG. 3 is an enlarged perspective view of the main parts thereof. In the figure, 11 is a paper feed roller, 12 is a roller support frame, 14 is a side plate, 15 is a roll of recording paper,
16 is a rotating shaft, 17 is a first holding member, 18 is a bearing groove, 20 is a rolled recording paper fall prevention device, 2
1 is a first link, 22 is a second link, 24 is a slit opening, 25 is a first stopper pin, 2
6 is an operating lever, 27 is a second stopper pin,
28 is an engagement groove, and 29 is a second holding member.

Claims (1)

[Scope of Claim for Utility Model Registration] In a recorder that uses roll-shaped recording paper and feeds the recording paper continuously or intermittently by a paper feed roller, the roll-shaped paper formed between the left and right side plates and the ends of the side plates a casing including an opening for taking in and taking out recording paper; a support frame that rotatably supports the paper feed roller and is pivotably supported on the side plate; and a support frame that receives the rotation shaft of the rolled recording paper. a shaft holding member having a bearing groove; a first link connected to the support frame; and a bell crank-shaped second link pivotally connected to the side plate and having one end connected to the first link. and the second link
and a stopper means attached to open and close the opening of the bearing groove at the other end of the link, and rotation of the second link causes the paper feed roller to move the support frame and the first link. the stopper means is selectively moved between an upper operative position proximate the recording stylus and a lower inoperative position disengaged from the recording stylus, and in connection therewith, the stopper means opens and closes the opening in the bearing groove. A recorder characterized by: