JPS60204533A - Spring clutch - Google Patents

Abstract

PURPOSE:To make it possible to optionally change the stopping position of the output shaft of a spring clutch used for a paper feed roller in an electronic copying machine, by forming a sufficient swingable space in a notch in a locking section. CONSTITUTION:In a spring clutch device, there are provided an input side rotary member 37, an output side rotary member 39, a clutch spring for transmitting the drive of the input side rotary member 37 to the output side rotary member 39, a control ring 60 engaged with the clutch spring, for controlling the loosening and fastening of the spring, control members 601 through 604 disposed in the control ring 60 and a control ring locking member 40 engaging with and disengaging from the control members 601 through 604 to control the control ring 60. In this spring clutch device, a notch section A'2 for locking the curved section A'1 of the clutch spring in the control ring 60 is enlarged, and as well the control members 601 through 604 are subjected to a change in their shape so as to have a triangular shape as shown in the drawing, having a thinnest side surface opposing the surface to which a control ring locking pawl 40 is locked.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a spring clutch device for various machines such as copying machines, printing machines, recording machines, and other machines that have a drive transmission disconnection mechanism for intermittently conveying a 7-piece member, etc. It is related to.

Conventionally, this type of device has been used, for example, for intermittent driving of the paper feed roller section in a single-child copying device.
The configuration was as shown in the figure. In Figure 1, 1
2 is a cassette in which sheet-like members P such as copy paper and recording paper are stacked, and 2 is a paper feed roller that feeds the sheet-like members P from the cassette. The paper feed roller 2 is fixed to a shaft 39, and the driving force of the shaft 39 is transmitted via the spring clutch device 3. In the spring clutch device 3, transmission of driving force is interrupted or interrupted by the operation of a control ring locking pawl 4. Reference numeral 5 denotes a guide member constituting a conveyance path for the transferred transfer paper, and 6 indicates a synchronous row 2 for feeding the transfer paper through the main body of the copying apparatus. Next, the details of the spring clutch device 3 are shown in Figures 2 and 3.
Do this using diagrams. In the figure, 37 is a gear to which driving force is input; is a winding trunk portion that presses the spring clutch spring 35. A on both ends of the spring clutch spring 35.
Bending and raising of H is configured. Bending A is a cutout portion A of a control ring 31 having one control ring type 31+;
It is in a loosely fitted state, and the bending B is the output winding drum 33.
is engaged with. The output winding drum 33 is fixed to the shaft 39 with a set screw or the like.

The operation of the spring clutch device 3 is such that when the control ring locking pawl 4 is not locked with the control ring type 3, the spring clutch spring 35 moves in the direction of rotation of the input gear 370. The inner diameter of the spring clutch spring 35 is pulled by the frictional force between the spring clutch spring 35 and the input gear 37. Therefore, the output winding drum 33 is engaged with the spring clutch spring 35,
The control ring 31 also rotates at the same time, and the driving force is transmitted to the shaft 39.

Next, when the control ring locking pawl 4 and the control ring mold 311 are locked, the control ring 31 changes from the driving state to the stopped state, and the bent portion of the spring clutch spring 35 that engages with the control ring notch A2 A1, spring clutch panel 35 and winding drum 37. There is a loose state between them.

Therefore, the driving force from the input gear 37 slips between the winding drum 37+ and the spring clutch spring 35, and is no longer transmitted. As explained above, it is understood that when it is desired to drive the paper feed roller 2, the control ring locking pawl 4 is released, and when it is desired to stop it, it is sufficient to set it in the locked state. In the case of the paper feed section described above, the control ring type 31. is one, but if stopping positions are required at multiple points during one rotation, a control ring type 31. becomes multiple. For example, the multiple control ring type described above can be used to control a multi-point stop type circular rotary table, a color filter turret in a lighting device, and a rotation control of a transmission having a plurality of gears with different gear ratios in the turret shape. A spring clutch device will be used. However, in the multiple control current spring clutch device, the relationship between the control ring type and the control ring locking pawl is as shown in FIG. FIG. 4 shows a spring clutch device having a plurality of control rings 50° to 504, in which driving force from an input gear 37 is transmitted to an output shaft 39 via a spring clutch spring 35 (not shown), as described above. Show me.

50 is a plurality of control ring types 50. ~504 is a control ring, 40 is a control ring locking pawl, and the control ring locking pawl 40 is provided with a fixed movable ring <-40,
The control ring locking pawl 40 is movable. From the operating pressure of
It is configured to be movable in the direction of the arrow along guide rails 45 and 46. Therefore, the position of the control ring locking pawl 40 is changed to the control ring type 50. The stopping position of the output shaft 39 can be determined depending on which position of the output shaft 39 corresponds to the output shaft 39.

Next, in FIGS. 5 and 6, the input gear 37KAI
! The control ring type 50 when power is applied to the control ring type 50 and the locked state of the control ring locking pawl 40'' (Fig. 5), and the control ring type when the driving force of the input gear 37 is cut off (Fig. 6). 50. This shows the state in which the control ring locking pawl 40 is released. FIG. 5 shows the control ring mold 5011 and the control ring locking pawl 40 locked in the driving state. At this time, Panek 2 Tsuchi / Gune 3
5 is in contact with the left side surface of the notch A of the control ring 50 (neck clutch spring bent part A), and the input gear winding drum 37. The force E is output to the output shaft 39 and is displayed. Next, as shown in FIG. 6, when the driving force E stops, the control ring locking pawl 40 is moved by the moving lever 40, and the output shaft 39 is set to a new stop position. The above-mentioned loosened spring clutch spring 35 moves in the direction of arrow F due to the return force of the spring, and at the same time the control ring 50 engaged with the bent portion A moves.
The output shaft 39 also rotates in the direction of arrow F by the return amount of the spring clutch spring 35 and stops as shown. When you want to move to the position, move lever 40. When you move the control ring mold 501 and the control ring locking pawl 40
If the button interferes with the button, making it impossible to operate, or if excessive force is applied, the pawl may be deformed, broken, or otherwise damaged.

It is impossible to arbitrarily change the stop position of the output shaft when the driving force is stopped, and the stop position is always changed when the drive force is stopped.

Therefore, an object of the present invention is to provide a new spring clutch device that is improved in view of these drawbacks.

Another object of the present invention is to provide a spring clutch device that can arbitrarily change the stopping position of the output shaft.

Still another object of the present invention is to provide a latch device that can be easily reset in the event of a malfunction.

That is, the main table structure of the present invention that can achieve the above object is: an input side rotating body and an output side rotating body.

a clutch spring that transmits the drive of the input side rotating body to the output side rotating body; a control ring that engages with the clutch spring to control loosening and tightening thereof; a control member provided on the control ring; In a spring clutch device having a control ring locking member that engages and disengages from a control member to control the control ring, a gap is provided in the engagement portion between the control ring and the clutch spring to allow rotation in the rotational direction thereof. This is a spring clutch device featuring the following.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. FIG. 7 is a perspective view showing an embodiment of the present invention. Components having the same functions as those shown in FIG. 4 are given the same reference numerals in the figure, and their explanations are omitted. The notch A of the control ring 60 that engages with the bent portion A1 of the spring clutch spring 35 is enlarged, and at the same time the control ring 60 is enlarged. ~60. As shown in the figure, the shape has been changed into a triangular prism shape so that the side surface facing the surface that engages with the control ring retaining pawl 40 is the thinnest. FIG. 8 shows a locking release state after the drive is stopped, similar to FIG. 6, and in this state, the control ring locking pawl 40
Move the lever 40s to the original control position 60m when returning to the original control position 60m. When the control ring locking pawl 40 comes into contact with the control ring locking pawl 40, a schematic diagram of the force as shown in FIG. 9 acts. The acting force α is
The vector component αH1αV becomes αH and the eighth
Apply rotational force in one direction as shown in the figure.

Therefore, since the notch A of the control ring 60 is sufficiently enlarged, the control ring 60 can be freely rotated in the KI direction, and the movement of the control ring locking pawl 40 can be controlled.

It doesn't have any negative effects. Also, based on the same idea, the control ring locking pawl 40
It is also effective to make it into a triangular prism shape (Fig. 10) 6 Furthermore, K, which smoothes the movement of the contact between the control models 601 to 604 and the control ring locking 40, can be made into a triangular prism shape. Desirable (Figure 11).

FIG. 12 shows an embodiment of another type of spring clutch device having a 9 m number O control 1 fl pawl. 37 is an input gear as described above, and is connected to the shaft 3 via a spring clutch spring (not shown).
9 is the same, but the arrangement of the control model 70s=70 of the control ring 70 is different, and they are arranged at different heights on the same circumference. Further, the control ring locking pawl 80 is supported by a guide member 81 so as to move in a direction K (direction G in the drawing) substantially perpendicular to the direction of the output shaft. Further, as in the above-described embodiment, the control ring notch portion A: which locks with the spring clutch spring bent portion A: has the control ring locking pawl 80 moved (b), and the control ring locking claw 80 is
It has a width that allows the control ring 70 to freely swing in the direction of arrow H when it comes into contact with 0t. In this embodiment, the output shaft stop position is limited to one position at the control ring locking claw position in the state shown in FIG. 70I or 70. It is a spring clutch device that can be stopped at two places, either of which is locked. As described above, since the collision state between the first control ring pawl and the control ring locking pawl is different from that in the previous embodiment, the pawl shape is also changed to 70. Providing the tip with an acute angle, as shown in Figure 2, works effectively to release the claw.

Further, as in the previous embodiment, providing the control ring locking pawl 80 at an acute angle has the same effect (FIG. 13), and furthermore, by providing both at an acute angle, smooth escape of the pawl is possible ( Figure 14).

In the embodiments described above, the control ring locking pawl can be moved manually or by using a power source such as a plunger.

According to the embodiment of the present invention as described above, a sufficient swinging space is provided in the notch of the locking portion of the control ring with the spring clutch spring, and the shape of the control ring or the control ring locking pawl is further modified. With a simple configuration in which the two are in contact and the force at the edge acts as the control ring rotational force, multiple output shaft stop positions can be provided, and the stop position setting operation can be performed at any time, for example, even when the drive is stopped. It is possible to provide a spring clutch device having a plurality of pawls on the control ring, which can be used to adjust the position of the driver and correct the operation in the event of an erroneous operation.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the paper feeding section of an electronic copying machine using a conventional spring clutch device, Fig. 2 is an exploded view of the configuration of a conventional spring clutch, and Fig. 3 is a view of the paper feeding section using a conventional spring clutch. Figure 4 is a perspective view of a spring clutch device having multiple control layers, Figures 5 and 6 are sectional views showing the driving and stopped states of the spring clutch device having multiple control layers, and Figure 7 is a perspective view of a spring clutch device having multiple control layers. FIG. 8 is a sectional view of the spring clutch device of the present invention; FIGS. 9, 10, and 11 are schematic diagrams of the control ring type or control ring locking pawl shape of the present invention; FIG. 12 13 is a perspective view of a spring clutch according to another embodiment of the present invention, and FIGS. 13 and 14 are schematic diagrams of a control ring type or control ring locking pawl shape of another embodiment. In the figure, A: is a bent part, A: is a notch part, 60-7
0 is the control ring, 60+ ”” 604 s 'IO+ ”
702 is a control ring type, and 40.8o is a control ring locking pawl. Applicant: Canon Co., Ltd. Figure 4

Claims (1)

[Scope of Claims] An input-side rotating body, an output-side rotating body, a clutch spring that transmits the drive of the input-side rotating body to the output-side rotating body, and a clutch spring that engages with the clutch spring to loosen and tighten the clutch spring. A spring clutch device having a control ring for controlling, a control member provided on the control ring, and a control ring locking member for engaging and disengaging from the control member and controlling the control ring, the control ring and the clutch spring A spring clutch device characterized in that a gap is provided in a retaining portion to allow rotation in the rotation direction of the spring clutch device.