JPH01117156A - Feeder for long paper - Google Patents

Abstract

PURPOSE:To keep a travel speed constant all the time irrespective of a variation in a diameter of long paper as well as to set a winding speed of the long paper and its winding quantity to be constant at all times by forming a feeder into such a structure that makes a drive roller contact with the long paper and travels the paper at a specified speed. CONSTITUTION:Drive rollers 23a, 23b are made contact with long paper 2 stretched across between a winding holder 8 and a feed holder 8', and these drive rollers 23a, 23b are rotated as much as the specified value at a specified speed. If so, since each radius of these drive rollers 23a, 23b is always constant, even if a diameter of the long paper 2 is varied in proportion as advancing feed of the long paper 2, this paper 2 travels as much as the specified value at the specified speed all the time. In this case, the winding holder 8 situated in front of these drive rollers 23a, 23b is being driven at a higher winding speed than a travel speed of the long paper 2. Consequently, this speed difference is compensated by a slip of a slip mechanism of the winding holder 8, so that tension of the long paper 2 in front of the drive rollers 23a, 23b is maintained to a proper value corresponding to frictional force of this slip mechanism.

Description

Detailed Description of the Invention A2 Object of the Invention (1) Industrial Application Field The present invention relates to a device for running a long sheet of paper stretched between a pair of holders, and in particular, it relates to a device for running a long sheet of paper stretched between a pair of holders. This invention relates to a device for supplying long paper with stable tension to take copies of printed serial numbers.

(2) Conventional technology Conventionally, in order to perform product control and quality control, etc., copies of engraved characters such as serial numbers engraved on workpieces have been successively copied onto long sheets of paper. As an example of a long paper feeding device used for this purpose,
The one described in Japanese Patent No. 18491 is known.

The above-mentioned device has a supply holder 01 as shown in FIG.
A long sheet of paper 05 is passed between the winding holder 02 and the winding holder 02 via guide rollers 03.04, and the winding holder 02 is rotationally driven by the motor 06.
The motor o6 is also provided with a detector 07 which detects the traveling distance of the paper 05 and stops the motor o6 every time this distance reaches a predetermined constant value. That is, this detector 07 includes a pair of rollers 08 and 09 that sandwich both sides of the paper 05 and are rotated by the running of the paper 05, and has a through hole 011 fixed to the rotating shaft 010 of one of the rollers 09. By detecting the number of rotations of the rotating disk 012 with a photoelectric sensor 013, the distance traveled is detected. And the guide roller 03
, 04 is located an engraving ring 015 supported by a cylinder 014, and the cylinder 014 is driven to press the engraving ring 015 onto the workpiece via the paper 05, thereby stamping the workpiece. Paper 05 at the same time
You are about to get a copy of it above.

(3) Problems to be Solved by the Invention The conventional long paper feeding device described above detects the amount of paper feed and stops the paper feed every time the paper travels a predetermined length. , which attempts to make it possible to take copies at regular intervals on paper, but only the take-up holder is rotated to feed the paper, and the outer diameter of the take-up holder is the same as the paper roll. The paper feed speed and feed amount (
In other words, it is difficult to keep the paper winding speed and winding constant, and this causes the paper to become unstable, causing wrinkles and slack, which hinders the work of making copies. had.

The present invention has been made in view of the above-mentioned circumstances, and includes:
In a device that runs and supplies a long sheet of paper that is stretched between a pair of holders, the paper feed speed and feed amount (
That is, it is an object of the present invention to provide an apparatus that can easily maintain a constant winding speed and winding amount of paper.

B1 Structure of the Invention (1) Means for Solving the Problems In order to achieve the above object, the long paper supply device of the present invention spans the long paper between a take-up holder and a supply holder, and A drive roller is brought into contact with the long paper to run the long paper at a predetermined speed, and a take-up holder is rotationally driven via a friction slip mechanism at a take-up speed higher than the predetermined speed. .

Further, an embodiment of the long paper supply device of the present invention is characterized in that the supply holder is rotationally driven at a feeding speed slower than the predetermined speed via a friction slip mechanism. The long paper feeding device of the present invention has a configuration in which a drive roller is brought into contact with the long paper stretched between a take-up holder and a supply holder, and the drive roller is rotated by a predetermined amount at a predetermined speed. let Then, since the radius of the drive roller is always constant, the long paper always travels a predetermined distance at a predetermined speed. Since the take-up holder located in front of this drive roller is driven at a winding speed faster than the running speed of the long paper, the speed difference is compensated by the slippage of the friction slip mechanism of the take-up holder, and the The tension of the long paper in front of the roller is the a! of the slip mechanism. It is maintained at an appropriate value commensurate with the friction force.

Further, in the embodiment of the long paper feeding device of the present invention having the above-mentioned configuration, since the supply holder located behind the drive roller is driven at a feeding speed slower than the running speed of the long paper, The speed difference is likewise compensated for by the slipping of the Pj slip mechanism of the supply holder in the opposite direction to that mentioned above,
At the same time, the tension of the paper strip behind the drive roller is also maintained at an appropriate tension.

(3) Example Hereinafter, an example of a long paper feeding apparatus according to the present invention will be described based on FIGS. 1 to 6.

1 and 2 are a plan view and a front view of the present embodiment, in which a base 1 made of an elongated plate is provided with a winding mechanism A and a forced feeding mechanism B at one end thereof. A feeding mechanism C and a paper feeding confirmation mechanism are provided at the other end. In the center of this base 1, a stone printing device WE is located for taking a rough copy of the serial number of the engine, which is a workpiece, and a long paper 2 for stone printing fed out from the feeding mechanism C. are a paper feed confirmation mechanism D and a guide roller 3a.

3b, a stone printing device E, guide rollers 3c and 3d, and a forced feed mechanism B to be wound up by a winding mechanism A.

Next, the winding mechanism A will be explained in detail based on FIG. 3.4. A bushing 5 constituting a bearing is integrally fixed to an opening 4 formed in the base 1, and a drive shaft 6 is mounted inside the bushing 5.
The large diameter portion 6a is rotatably supported. A shaft 7 is fitted into a recess 6b formed in the large diameter portion 6a of the drive shaft 6, and the shaft 7 has a flange 8a at one end.
A take-up holder 8 is fixedly attached thereto. A groove 8b (see FIG. 4) is formed at the center of the lower end of the winding holder 8, and a convex portion 6f formed at the center of the upper end of the drive shaft 6 fits into the groove 8b. ing. This fitting allows the rotational force of the drive shaft 6 to be transmitted to the take-up holder 8. Further, a flange 8c is detachably attached to the upper end of the shaft 7 with screws 9. on the other hand,
A slip ring 10,
A sprocket 11 and a collar 12 are loosely fitted, and a nut l- is screwed into a threaded portion 6d formed at the end of the small diameter portion 6C.
The slip ring 10 is pressed against the stepped portion 6e formed between the large diameter portion 6a and the small diameter portion 6C of the drive shaft 6 via the collar 12 and the sprocket 11 by a spring 14 whose elastic force can be adjusted at 13. As is clear from the above description, the shaft 7 of the winding holder 8 has a stepped portion 6.
e. Slip ring 10. It is rotationally driven via a friction slip mechanism 15 consisting of a sprocket 11.

A motor 16 is fixed to the base l, and its sprocket 17 is connected to one tooth portion 11a of the sprocket 11 of the drive shaft 6 via a chain 18. Therefore, when the motor 16 is started, its rotational force is transmitted to the sprocket 17, chain 18, and sprocket 11, and further rotates the take-up holder 8 via the friction slip mechanism 15 described above. The winding speed of the long paper 2 due to the rotation of the winding holder 8 increases in proportion to the diameter of the long paper 2 wound up on the winding holder 8, but immediately after the winding starts. The speed when the diameter of the long paper 2 is small is also set to be higher than the feeding speed by forced feeding mechanism B, which will be described later.

Next, the forced feeding mechanism B will be explained in detail based on FIG.

A bracket 20 having a bearing 19 inside is fixed to the base l near the winding mechanism, and the bearing 19 has a pair of shafts 22a and 22b passing through an opening 21 formed in the base l. is supported. At one end of the pair of shafts 22a, 22b, there is a pair of drive rollers 23a, 23b that sandwich both sides of the long paper 2.
A pair of timing gears 24a and 24b that mesh with each other are fixed to the other end.

Furthermore, one shaft 22a is connected to this timing gear 24.
a, and at its tip end there is a tooth portion 1 of a sprocket 11 loosely fitted to the drive shaft 6 of the winding mechanism A.
1b and a sprocket 27 that meshes with a chain 2 which is stretched across a sprocket 29 of a tensioner 26 supported by the base 1 through a long hole 25 (see FIG. 1.3). Therefore, when the sprocket 11 is driven by the motor 16, its rotational force is further transmitted to the sprocket 27, and the timing gears 24a, 2
The drive rollers 23a and 23b are rotated in opposite directions via the drive roller 4b. In this way, the long paper 2 is rotated at the rotational speed of the motor 16, the sprocket 17, and the sprocket 1.
1. The vehicle is forced to run at a predetermined speed determined by the number of teeth on the sprocket 27.

FIG. 5 shows details of the feed mechanism C. Since this feeding mechanism C has almost the same structure as the aforementioned winding mechanism A, the reference numeral of the member is indicated by the corresponding winding mechanism A.
Only the differences will be explained using the reference numerals with a dash appended to the reference numerals attached to the members. ) That is, the sprocket 11 of the winding mechanism A has a tooth portion 11a with which the chain 18 connected to the motor 16 meshes,
While the chain 28 connected to the drive rollers 23a, 23b has teeth 11b that mesh with each other, the sprocket 11' of the feed mechanism C is connected only to the motor 16'. The feeding speed of the long paper 2 due to the rotation of the supply holder 8' decreases in proportion to the diameter of the long paper 2 wound around the supply holder 8'. The speed when the diameter of 2 is large is also set to be lower than the feeding speed by the forced feeding mechanism B described above.

Next, the paper feed confirmation mechanism will be explained in detail based on FIG. 2.6. The paper feed confirmation mechanism is provided close to the above-mentioned feed mechanism C, and has a function of detecting the travel distance of the long paper 2. That is, a shaft 32 is rotatably supported by a bearing 31 on a bracket 30 provided on a base l, and a roller 33 that contacts the long paper 2 is fixed to one end of the shaft 32, and a roller 33 that contacts the long paper 2 is fixed to the other end of the shaft 32, as shown in FIG. As shown in FIG. 3, a dog 34 having three protrusions around the periphery is fixed.

A proximity switch 36 such as a photoelectric sensor attached to the base 1 via an arm 35 faces the outer periphery of the dog 34, and is configured to detect the number of rotations of the dog 34 due to the running of the long paper 2. It has become.

In addition, in FIG. 1, the proximity switch 37 provided near the feed mechanism C and the paper feed confirmation mechanism is for checking the presence or absence of the long paper 2, and in case the long paper 2 should be cut or When the long paper 2 is used up, this is detected and the entire apparatus is stopped.

Next, the operation of one embodiment of the long paper feeding apparatus according to the present invention having the above-described configuration will be described.

Prior to the operation of this device, the long paper 2 wound into a roll is set on the supply holder 8' of the feeding mechanism C, and the end of the long paper 2 is passed between the roller 33 of the paper feed confirmation mechanism and the guide roller. 3a, 3b, 3c, and 3d, and further passed between a pair of drive rollers 23a, 23b of forced feeding mechanism B, and fixed to winding holder 8 of winding mechanism A.

The engraving part of the engine, which is conveyed so as to be opposed to it, is positioned in the middle of the long paper 2 that has not been set in this way, and the stone printing device E is operated to copy the stamp on the long paper 2. Once the copy has been taken, the engine is moved, and the paper is fed in the following manner until the next engine is delivered.

When the motor 16 to the winding mechanism starts, its rotation is transmitted to the sprocket 11 via the chain 18, and further, the rotation is transmitted via the chain 28 to the sprocket 27 fixed to the shaft 22a of the forced feed mechanism B. . When the shaft 22a rotates in this manner, the shirt l-22b rotates in the opposite direction via the timing gears 24a and 24b, and the long shirt 1-22b is held between drive rollers 23a and 23b fixed to both shafts 22a and 22b. Paper 2 is run at a predetermined speed.

Simultaneously with driving the drive rollers 23a and 23b described above, the rotation of the sprocket 11 of the winding mechanism A is transmitted to the drive shaft 6 via the friction slip mechanism 15, and the winding holder 8 is moved at a speed higher than the feed speed of the drive rollers 23a and 23b. Driven at high speed. However, since the speed of the long paper 2 is regulated by the forced feeding mechanism B, the speed difference with the winding mechanism A is due to the slip ring 10 of the friction slip mechanism 15.
This is absorbed by the sliding between the sprocket 11 and the slip ring 10 and the stepped portion 6e of the drive shaft 6. Then, by adjusting the elastic force of the spring 14 of this friction slip mechanism 15 by tightening the nut 13, the driving roller 23a.

The tension of the long paper 2 between the take-up holder 8 and the take-up holder 8 can be adjusted to an appropriate value.

On the other hand, the motor 16' of the feeding mechanism C is also activated at the same time, and drives the supply holder 8' at a speed lower than the feeding speed of the drive rollers 23a and 23b. The supply holder 8' is pulled by the running long paper 2 and rotates at a higher speed than its own feeding speed, and the difference in speed is absorbed by the sliding of the friction slip mechanism 15'. At this time, similarly to the winding mechanism A described above, the tension of the long paper 2 between the drive rollers 23a, 23b and the supply holder 8' is controlled by adjusting the elastic force of the spring 14' with the nut 13'. It can be adjusted to an appropriate value.

When the long paper 2 runs as described above, this long paper 2
The roller 33 and dog 34 of the paper feed confirmation mechanism that come into contact with
rotates, and the proximity switch 31 detects the rotation speed.

Therefore, every time the dog 34 rotates a predetermined number of times, the motor 16
, 16' are stopped, the long paper 2 is intermittently fed in predetermined lengths, and copies can be obtained on the long paper 2 at regular intervals.

According to the embodiment described above, the take-up holder 8 and the supply holder 8' are driven via the friction slip mechanism 15, 15' at a speed related to the feed speed of the drive rollers 23a, 23b, so that the long paper Only a slight tension due to the frictional force of the friction slip mechanism acts on the long paper 2, and there is no risk of the long paper 2 being cut due to excessive tension.
The occurrence of wrinkles and sagging is also prevented.

Furthermore, since the friction force of the friction slip mechanism can be adjusted, the tension of the long paper 2 can be easily set to a desired value.

Although the embodiments of the long paper feeding device according to the present invention have been described in detail above, the present invention is not limited to the above embodiments, and the present invention does not depart from the scope of the claims. , it is possible to make various minor design changes.

For example, instead of using the slip ring 10.10' as the friction slip mechanism 15.15', a disk type friction slip mechanism with two friction disks facing each other, or a conical type friction slip mechanism with two friction conical surfaces combined may be used. Known mechanisms such as friction slip mechanisms can be used. Further, it is also possible to drive the winding mechanism A, the feeding mechanism C1, and the forced feeding mechanism B by separate motors, or by a common motor.

Furthermore, it is also possible to omit the motor 16' of the feed mechanism C, and it is also possible to provide a friction slip mechanism to the guide rollers 3a, 3b, etc.

In addition to being used in stone printing devices, the present invention can also be applied to paper feeding devices for various measuring devices and recording devices, and in this case, it is also possible to continuously feed the paper instead of intermittent feeding. .

C0 Effects of the Invention According to the above-mentioned long paper feeding device of the present invention, since the long paper is made to run by the drive roller that comes into contact with it,
Even if the diameter of the long paper wound around the take-up holder and the supply holder changes as the long paper is fed, the running speed can always be kept constant. Therefore, it is easy to always keep the feeding speed and feeding amount of the long paper constant.

[Brief Description of the Drawings] Fig. 1 is a front view of an embodiment of a long paper feeding device according to the present invention, Fig. 2 is a plan view of the same embodiment, and a view taken in the direction of the
FIG. 3 is a detailed view of the winding mechanism and forced feeding mechanism taken along the line ■-■ in FIG. 1, FIG. 4A is an exploded view of the friction slip mechanism, and FIG. 4B is a view seen from arrow IVB in FIG. Fifth
The figure is a detailed view of the feeding mechanism taken along the V-V line in Figure 1, Figure 6 is an enlarged view of the main parts of the paper feed confirmation mechanism and a view from the ■ arrow in Figure 2, and Figure 7 is a conventional long paper It is a figure showing a supply device. 2... Long paper, 6.6'... Drive shaft, 6e, 6e'
...Stepped portion, 8...Take-up holder, 8'...Supply holder, 10.10'...Slip ring, 1
1,111...Sprocket, 14.14'...
Spring, 15, 15'... Friction slip mechanism, 23a, 23b... Drive roller I ¥7 Figure 4B Figure 4A BIB13 stone 1

Claims (1)

[Claims] [1] A long sheet of paper (2) is stretched between the take-up holder (8) and the supply holder (8'), and the drive rollers (23a, 23b) are attached to this long sheet of paper (2). While making the long paper (2) run at a predetermined speed while making contact, the winding holder (8
) is rotationally driven via a friction slip mechanism (15) at a winding speed higher than the predetermined speed,
Long paper feeding device. [2] The supply holder (8') is attached to a friction slip mechanism (
15') at a feeding speed slower than the predetermined speed.
] The long paper feeding device described in item 1. [3] The friction slip mechanism (15, 15') includes a stepped portion (6e, 6e') formed on the drive shaft (6, 6') of each of the holders (8, 8'), and this stepped portion. (6e, 6e'
A long paper feeding device according to claim 1 or 2, comprising a sprocket (11, 11') that is pressed into contact with a sprocket (11, 11') that is pressed into contact with a sprocket (11, 11') via a slip ring (10, 10'). [4] Attach the sprocket (11, 11') to a slip ring (14, 14') with adjustable spring force.
10, 10'), the long paper feeding device according to claim [3].