JPH07103261A - Ribbon spring for one-way clutch and manufacture thereof - Google Patents

Abstract

PURPOSE:To provide a ribbon spring for an one-way clutch and a manufacture thereof wherein burrs can be prevented from being generated in manufacture. CONSTITUTION:Both side edges 2, 2 of a thin and band-like plate member 1 cut by a slitter are cut away by a presser. Next, a window and a tongue part 7 are formed by stamping out the plate member 11 by the presser. And then, a bent part 7a is formed on the window 5 and the tongue part 7. Accordingly burrs generated on both side edges of the plate member 11 when both side edges cut by the slitter are removed from the plate member 11 because both side edes 2, 2 are cut away by the presser.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ribbon spring for a one-way clutch and a method for manufacturing the ribbon spring.

[0002]

2. Description of the Related Art Conventionally, as a method of manufacturing a ribbon spring for a one-way clutch of this type, a wide plate member is cut into a strip-shaped plate member 50 by a slitter, and then the band-shaped plate member 50 is precisely formed. It is introduced into a press machine and punched while being sequentially fed to form a window 51 and a tongue portion 52 as shown in FIG. 4 (A). Further, the frames 53 and 53 sandwiching the window 51 and the tongue portion 52 are As shown in FIGS. 4C and 4B, the frame 53 and the tongue portion 52 are bent by a precision press machine in a direction orthogonal to the plate material 50.
There is a method of forming the bent portions 53a and 52a.

[0003]

However, in the conventional method for manufacturing a ribbon spring for a one-way clutch, burrs are generated when the wide plate material is cut into long and narrow pieces by a slitter, and both side edges of the strip-shaped plate material 50 are formed. Burrs occur on the part. Therefore, when the strip-shaped plate material 50 is introduced into the precision press machine and sequentially fed, burrs formed on the both side edge portions are caught by the guide portions of the progressive feeding device and the finished ribbon spring is distorted. There is a problem that it may occur.

Further, when the burr is caught, there is a problem in that the feeding is not smooth and the accuracy of forming the window 51 and the tongue portion 52 by the press machine is deteriorated.

Therefore, an object of the present invention is to provide a ribbon spring for a one-way clutch and a method of manufacturing the ribbon spring, which can prevent burrs from being generated during manufacturing.

In order to achieve the above object, in the method for manufacturing a ribbon spring for a one-way clutch according to the first aspect of the present invention, an engaging member arranged between an outer ring and an inner ring is fitted. In a method for manufacturing a ribbon spring for a one-way clutch having a plurality of windows and a tongue portion that biases the engaging member in one direction, both side edges of a plate member extending in a strip shape are cut by a press machine, and The central portion of the strip-shaped plate material with both side edges cut off is punched by a press machine, and the tongue portion protruding in the vertical direction from the window and the horizontal window frame extending in the horizontal direction intersecting the vertical direction in which the plate material extends. Forming a bent portion in the vertical window frame and the tongue by bending the vertical window frame and the tongue extending in the vertical direction in a direction substantially perpendicular to the plane in which the plate member extends. Is characterized by.

A method for manufacturing a ribbon spring for a one-way clutch according to a second aspect of the present invention is the method for manufacturing a ribbon spring for a one-way clutch according to the first aspect, wherein both side edge portions of the plate member extending in the band shape are formed. Is cut by a press machine so as to form a concave portion that is recessed from the outside in the lateral direction to the inside of the plate material.

According to a third aspect of the present invention, there is provided a method for manufacturing a ribbon spring for a one-way clutch, wherein a plurality of windows for fitting an engaging member arranged between an outer ring and an inner ring and the engaging member are arranged in one direction. In a method for manufacturing a ribbon spring for a one-way clutch having a biasing tongue portion, both side edges of a strip-shaped plate material is cut off with a press machine, and a portion between both side edges of the strip-shaped plate material is A vertical slit is cut by a press to form at least one slit-shaped cut portion extending in the vertical direction in which the plate material extends, and a plurality of vertically extending projection portions in which the band-shaped plate material extends are formed. Then, a plurality of central portions of the double-row protruding portions are punched at the same time with a pressing machine, and a plurality of windows and a plurality of protruding from the horizontal window frame extending in the horizontal direction intersecting the vertical direction in which the plate material extends are projected in the vertical direction. Forming the tongue of the The vertical window frames and the tongues extending,
It is characterized in that the plate member is bent in a direction substantially perpendicular to a plane in which the plate member extends to form a bent portion in the vertical window frame and the tongue portion.

A method for manufacturing a ribbon spring for a one-way clutch according to a fourth aspect of the present invention is the method for manufacturing a ribbon spring for a one-way clutch according to the third aspect, wherein both side edge portions of the plate material extending in the strip shape are provided. Is cut by a press machine so as to form a concave portion that is recessed from the outside in the lateral direction to the plate material, and a portion between both side edge portions of the strip-shaped plate material includes a convex portion that protrudes in the lateral direction. It is characterized in that it is cut into a slit shape to form the slit-shaped cut portion, and concave portions that are recessed in the lateral direction are formed on both sides of the protruding portion.

According to a fifth aspect of the present invention, a ribbon spring for a one-way clutch urges the plurality of windows fitted with the engaging members arranged between the outer ring and the inner ring and the engaging members in one direction. In a ribbon spring for a one-way clutch having a tongue portion, both side edge portions sandwiching the window are formed by cutting an outer portion adjacent to the outer side of the both side edge portions with a press machine. Is characterized by.

The ribbon spring for a one-way clutch according to a sixth aspect of the present invention is the ribbon spring for a one-way clutch according to the fifth aspect, wherein recessed portions that are recessed inward are formed on both side edge portions. It has a feature.

[0011]

According to the method of manufacturing the ribbon spring of the first aspect of the present invention, since both side edges of the strip-shaped plate material are cut by a press machine, both sides of the strip-shaped plate material are formed by a slitter. Even if there are burrs on the edges,
The burr is removed during cutting by the press.

Therefore, when the strip-shaped plate material is fed,
The burr will not get caught and the strip-shaped plate will not be distorted. Further, since the belt-shaped plate material is smoothly fed, the positions where the window and the tongue are punched by the press machine are accurate.

According to the method of manufacturing a ribbon spring of the second aspect of the invention, when the side edges of the strip-shaped plate material are cut by a press machine, the plate material is laterally inward from the outside. To form a concave recess. Therefore,
A horizontal recess is formed in the vertical window frame of the ribbon spring,
The bending rigidity of the ribbon spring is reduced, making it easier to bend it into a ring shape. Therefore, according to the invention of claim 2, a ribbon spring which can be easily incorporated in a one-way clutch is manufactured. Further, since the bending rigidity of the ribbon spring is reduced, the radial extension after being assembled in the one-way clutch is suppressed, and the roundness in the assembled state is improved. Further, the cutting start end portion or the cutting end portion for cutting the both side edges of the strip-shaped plate material with a pressing machine is made into a convex shape corresponding to the concave portion, and the cutting end portion and the next cutting start end portion are the concave portions. If the both side edges are sequentially cut so that they overlap, there will be no uncut residue between the cutting end portion and the cutting start end due to the positional displacement of the cutting portion in the vertical and horizontal directions.
That is, the permissible range for the positional deviation of the cutout portion is widened by the amount that the concave portion is recessed in the lateral direction.

In the method for manufacturing a ribbon spring according to the third aspect of the invention, since both side edges of the strip-shaped plate material are cut by a press machine, both sides of the strip-shaped plate material are formed by a slitter. Even if burrs are generated on the edges, the burrs are removed during cutting by the pressing machine. Therefore, burrs are not caught when the strip-shaped plate is fed, and the strip-shaped plate is not distorted. Further, since the belt-shaped plate material is smoothly fed, the positions where the window and the tongue are punched by the press machine are accurate.

Further, according to a third aspect of the present invention, a space between both side edge portions of the strip-shaped plate material is cut into a slit shape by a press machine,
At least one slit-shaped cutout portion extending in the extending direction of the plate material is formed to simultaneously form a plurality of rows of protruding portions extending in the extending direction of the strip-shaped plate material. Since a plurality of ribbon springs are formed at the same time by forming windows and tongues on the double-row protrusions, a plurality of ribbon springs are manufactured at the same time, and the yield per unit time is improved.

According to a fourth aspect of the invention, in the third aspect of the invention, when both side edges of the strip-shaped plate material are cut by a press machine, the plate material is recessed from the outer side to the inner side in the lateral direction. The concave portion is formed, the slit-shaped cutout portion is formed into a slit shape including a convex portion protruding in the lateral direction, and the concave portion recessed in the lateral direction is formed in the protruding portion. Therefore, a horizontal recess is formed in the vertical window frame of the ribbon spring, the bending rigidity of the ribbon spring is reduced, and the ribbon spring is easily bent into a ring shape. Therefore, it is easy to install in the one-way clutch. Further, since the bending rigidity is reduced, the radial extension after being assembled in the one-way clutch is suppressed, and the roundness in the assembled state is improved. In addition, the cutting start end or cutting end for cutting the both side edges of the plate material extending in the band shape and the portion between the both side edges with a press is made into a convex shape corresponding to the recess, and the cutting end and If both side edges are sequentially cut off so that the cutting start end part of the cutting part overlaps with the recessed part, there will be uncut residue between the cutting end part and the cutting start end part due to the positional displacement of the cutting part in the vertical and horizontal directions. Lost.

Further, in the ribbon spring of the fifth aspect of the present invention, both side edge portions sandwiching the window are formed by cutting out an outer side portion adjacent to the outer side of the both side edge portions with a press machine. . Therefore, even if there are burrs on the outer portion, the burrs are removed during cutting by the pressing machine.

That is, since the burrs of the ribbon spring are removed by the pressing machine at the time of manufacturing, the burrs are not caught at the time of manufacturing. Therefore, it is possible to prevent the distortion at the time of manufacturing and the deterioration of the processing accuracy due to the catching of the burr.

Further, in the ribbon spring according to the invention of claim 6, since the recessed portions which are recessed inward are formed at the both side edge portions, the bending rigidity of the ribbon spring is reduced, and the ribbon spring is easily bent in a ring shape. Therefore, it is easy to install in the one-way clutch. Further, since the bending rigidity is reduced, the radial extension after being assembled in the one-way clutch is suppressed, and the roundness in the assembled state is improved.
In addition, the cutting start end portion or the cutting end portion for cutting the outside portion with a pressing machine is formed into a convex shape corresponding to the recess, and the cutting end portion and the next cutting start end portion are sequentially overlapped with each other in the recessed portion. When the edge portion is cut off, there is no uncut portion between the cutting end portion and the cutting start end portion due to the positional displacement of the cutting portion in the vertical and horizontal directions. Therefore, it is possible to prevent burrs from being generated on both side edges.

[0020]

The present invention will be described in detail below with reference to the embodiments shown in the drawings.

An embodiment of a method for manufacturing a ribbon spring for a one-way clutch of the present invention will be described with reference to FIG. In this embodiment, first, the strip-shaped plate material 1 that has been cut into long strips with a slitter is fed in the rightward direction in FIG. The cutting by the press machine is performed by adding the plate material 1 to the plate material 1 described above.
Is formed so that concave portions 3, 3 which are recessed from the outer side to the inner side in the lateral direction perpendicular to the extending direction are formed.

Next, the central portion of the plate material 1 from which the both side edge portions 2 and 2 have been cut off is punched out by a press machine, and the window 5 and the tongue portion protruding vertically from the lateral window frame 6 extending in the lateral direction. Form 7.

Next, the vertical window frames 8 and 8 and the tongue portion 7 extending in the vertical direction are bent in the vertical direction with respect to the plane in which the plate 1 extends, so that the vertical window frames 8 and 8 and the tongue portion 7 are The bent portions 8a, 8a and 7a are formed.

A plurality of engaging members (not shown) arranged between the outer ring and the inner ring are fitted into the window 5, and the engaging members are biased in the engaging direction by the bent portions 7a. It is like this.

According to the above-mentioned manufacturing method, since both side edge portions 2 of the plate material 1 extending in a strip shape are cut by a press machine, burrs are generated on both side edge portions 2 when the plate material 1 is formed by a slitter. However, the burr is removed during the cutting by the pressing machine. Therefore, when the strip-shaped plate material 1 is sequentially fed, burrs are not caught on the guide portion or the like of the feeding device, and the strip-shaped plate material 1 can be prevented from being distorted. Further, since the belt-shaped plate material 1 can be fed smoothly, the punching positions of the window 5 and the tongue portion 7 by the pressing machine can be made accurate.

Further, since the excision by the press machine is carried out so as to form concave portions 3 and 3 which are recessed from the outer side to the inner side in the lateral direction perpendicular to the direction in which the plate material 1 extends,
The vertical window frame 8 of the completed ribbon spring is provided with the concave portion 3 which is recessed inward in the horizontal direction. Therefore, the bending rigidity of the ribbon spring is reduced, and the ribbon spring is easily bent into a ring shape. Therefore, according to the above-mentioned embodiment, it is possible to form the ribbon spring which can be easily incorporated into the one-way clutch.
Also, since the bending rigidity of the ribbon spring is reduced,
The radial extension after being assembled in the one-way clutch is suppressed, and the roundness in the assembled state is improved.

Further, the cutting start end or cutting end for cutting the both side edges 2 of the plate material 1 extending in the band shape by a press machine is made into a convex shape corresponding to the recess 3, and the cutting end and the next cutting start end. If the both side edge portions 2 are sequentially cut so that the portions overlap with the recessed portion 3, the uncut portion between the cutting end portion and the cutting start end portion due to the positional displacement of the portion to be cut is eliminated. Burr can be prevented.

Next, a second embodiment of the method for manufacturing a ribbon spring for a one-way clutch of the present invention will be described with reference to FIG.

In the second embodiment, first, a strip-shaped plate material 11 that is cut into a long strip with a slitter is sequentially fed to the right in FIG. 1 (B), while the side edges 12 and 12 are pressed by a press machine. To remove. This cutting is performed by adding the plate material 11 to the plate material 11.
Is formed so as to form concave portions 13, 13 recessed inward from the outside in the lateral direction perpendicular to the extending direction.

Simultaneously with the cutting of the both side edge portions 12, 12, the space between the both side edge portions 12 of the strip-shaped plate material 11 is cut into a slit shape including a convex portion projecting laterally by a pressing machine. Thus, the slit-shaped cutout portion 14 extending in the longitudinal direction in which the plate material 11 extends is formed. This slit excision part 1
By forming 4, the two rows of protrusions 19, 19 having the recesses 13 and 20 recessed in the lateral direction on both sides are formed.

Next, the central portion of the protruding portion 19 is punched out by a pressing machine to form a tongue portion 17 protruding in the vertical direction from the window 15 and the horizontal window frame 16 extending in the horizontal direction.

Next, the vertical window frame 18 and the tongue portion 17 extending in the vertical direction are bent in a direction substantially perpendicular to the plane in which the plate member 11 extends, and the vertical window frame 18 and the tongue portion 17 are bent. 18a and 17a are formed.

According to the manufacturing method of the second embodiment described above, the slit-shaped cutout portions 14 extending in the vertical direction are formed between the side edges 12 and 12 of the strip-shaped plate material 11, and the two rows of the protruding portions 1 are formed.
9 and 19 are formed at the same time, and the windows 15 and 15 and the tongues 17 and 17 are formed on the two rows of protrusions 19 and 19 to form two ribbon springs at the same time, thus improving the yield per unit time. Can be made. Therefore, the cost of the ribbon spring can be reduced.

A partially enlarged view of the ribbon spring for a one-way clutch manufactured in the second embodiment is shown in FIG. 2 (A).
The ribbon spring shown in FIG. 2A is an embodiment of the ribbon spring of the present invention. This ribbon spring is formed by cutting the outer side edge portions 12 of the vertical window frames 18, 18 and the slit-shaped cutting portion 14 with a pressing machine. Therefore, even if there is a burr on the outer side edge portion 12, the burr is removed at the time of cutting by the pressing machine. That is, since the burrs of the ribbon spring are removed by the press machine at the time of manufacturing, the burrs are not caught at the time of manufacturing. Therefore, it is possible to eliminate the distortion at the time of manufacturing and the deterioration of the processing accuracy due to the catch of the burr, and the dimensional accuracy is improved. Further, since the recesses 13 and 20 are formed in the vertical window frames 18 and 18 of the ribbon spring, the bending rigidity is reduced and the ribbon spring is easily bent into a ring shape. Therefore, it is easy to install in the one-way clutch. Further, since the bending rigidity becomes small, the radial extension after being assembled in the one-way clutch is suppressed, and the roundness in the assembled state can be improved. Also,
A cutting start end or a cutting end for cutting the both side edges 12 of the plate member 11 extending in the band shape and a portion between the both side edges 12 and 12 with the press machine is provided with the recesses 13 and 20.
When the both side edge portions 12 and the slit-shaped cut portion 14 are sequentially cut so that the cut end portion and the next cut start portion overlap with each other in the concave portions 13 and 20, the cut portion 12 is cut. It is possible to prevent the occurrence of burrs by eliminating the uncut residue between the cutting end portion and the cutting start end portion, which is caused by the positional deviation of the vertical and horizontal directions of 14 and 14.

In the manufacturing method of the second embodiment, only one slit-shaped cutting portion 14 is formed and two ribbon springs are manufactured at the same time. It is also possible to form more than three ribbon springs and simultaneously manufacture three or more ribbon springs. In this case, the yield of the ribbon spring per unit time can be further improved.

Further, in the manufacturing method of the second embodiment described above, both side edges 12 and 12 are cut off and the slit-shaped cutout portion 14 is formed at the same time. The slit-shaped cutout portion 14 may be formed after the sheet 11 is sequentially fed, or conversely, the slit-shaped cutout portion 14 may be formed and the plate material 11 is sequentially fed, and then both side edge portions 12 and 12 may be cut out.

In the first and second embodiments, the bent portions 8a and 18a of the vertical window frames 8 and 18 and the tongue portions 7 and 17 are formed.
The bending portions 7a and 17a of the plate material 11 were formed when the feeding phase of the plate material 11 was the same, but the bending portion of the vertical window frame and the bending portion of the tongue portion were formed with the same feeding phase of the plate material 11. You may go at a different time.

Further, in the above embodiment, the concave portions 13 and 20 formed in the vertical window frame are concave portions sandwiched by the slanted straight line and the curved curve as shown in FIG. 3 (F). As shown in, the shape may be semicircular. Further, as shown in FIG. 3 (B), the recess may be formed in a right triangle shape in which one side is cut at a right angle, and as shown in FIG. 3 (C), a right triangle in which the other side is cut at a right angle. It may be shaped. Alternatively, as shown in FIG. 3D, a semi-elliptical shape may be used. Also,
As shown in FIG. 3 (E), the recess may be rectangular.

Further, as shown in FIG. 2B, a slit for adjusting the window pitch may be formed between the windows.

As shown by the broken line at the right end of FIG. 1 (B), when one of the two ribbon springs has a different end cut shape from the other, the above end cut shape is changed. The differences can help track manufacturing lots.

[0041]

As is apparent from the above, the method of manufacturing the ribbon spring for a one-way clutch according to the first aspect of the invention is
Since both side edges of the strip-shaped plate material are cut by a press machine, even if burrs are generated on the both side edges when the strip-shaped plate material is formed by a slitter, the burrs are cut by the press machine. Can be removed at times.

Therefore, at the time of feeding the above strip-shaped plate material,
The burr can be prevented from being caught, and the strip-shaped plate material can be prevented from being distorted. Further, since the belt-shaped plate material can be fed smoothly, the positions where the window and the tongue are punched by the press machine can be accurately adjusted.

According to a second aspect of the present invention, in the method for manufacturing a ribbon spring, a press machine is used to press both side edges of a plate material extending in a strip shape so as to form a concave portion recessed inward from the outer side in the lateral direction. Remove with. Therefore, a horizontal recess is formed in the vertical window frame of the ribbon spring, the rigidity of the ribbon spring is reduced, and the ribbon spring can be easily bent into a ring shape. Therefore, according to the invention of claim 2, it is possible to manufacture a ribbon spring which can be easily incorporated into a one-way clutch. Further, according to the above-mentioned invention, since the rigidity of the ribbon spring is reduced, the radial extension after being assembled in the one-way clutch is suppressed, and the roundness in the assembled state can be improved. Further, the cutting start end portion or the cutting end portion for cutting the both side edges of the strip-shaped plate material with a pressing machine is made into a convex shape corresponding to the concave portion, and the cutting end portion and the next cutting start end portion are the concave portions. If the both side edges are sequentially cut so as to be overlapped with each other, it is possible to eliminate the uncut residue between the cutting end portion and the cutting start end due to the positional deviation of the cutting portion in the vertical and horizontal directions.

Further, in the method for manufacturing the ribbon spring according to the third aspect of the invention, since both side edges of the strip-shaped plate material are cut by a press machine, both sides when the strip-shaped plate material is formed by a slitter. Even if burrs are generated on the edges, they can be removed when the burrs are cut off by the pressing machine. Therefore, it is possible to prevent the burr from being caught when the band-shaped plate material is fed, and to prevent the band-shaped plate material from being distorted. Further, since the belt-shaped plate material can be fed smoothly, the positions where the window and the tongue are punched by the press machine can be made accurate.

Further, in the invention of claim 3, a space between both side edges of the strip-shaped plate material is cut into a slit shape by a press machine,
At least one slit-shaped cutout portion extending in the extending direction of the plate material is formed to simultaneously form a plurality of rows of protruding portions extending in the extending direction of the strip-shaped plate material. Since the windows and tongues are formed on the double-row protrusions to form a plurality of ribbon springs at the same time, the yield per unit time can be improved.

According to a fourth aspect of the present invention, in the third aspect of the invention, a press machine is used to press both side edge portions of the plate member extending in a strip shape so as to form a concave portion recessed inward from the outer side in the lateral direction. The strip-shaped plate material is cut into a slit shape including a convex portion protruding in the lateral direction to form a slit-shaped cut portion, and the portion between the both side edges of the strip-shaped plate material is laterally formed on both sides of the protruding portion. To form a concave recess. Therefore, according to the invention of claim 4, a horizontal recess is formed in the vertical window frame of the ribbon spring, the bending rigidity of the ribbon spring can be reduced, and the ribbon spring can be easily bent into a ring shape. Therefore, according to the invention of claim 4, it is possible to manufacture the ribbon spring which can be easily incorporated in the one-way clutch. Further, since the bending rigidity of the ribbon spring is reduced, it is possible to suppress the radial extension after being assembled in the one-way clutch, and it is possible to improve the roundness of the ribbon spring in the assembled state. Further, the cutting start end or cutting end for cutting off both side edge portions of the plate material extending in the band shape and the portion between the both side edge portions with a press machine has a convex shape corresponding to the recessed portion, and the cutting end portion and If both side edges are sequentially cut off so that the cutting start end part of the cutting part overlaps with the recessed part, the uncut portion between the cutting end part and the cutting start end part due to the positional displacement of the cutting part in the vertical and horizontal directions is removed. It can be lost.

Further, in the ribbon spring of the fifth aspect of the invention, the both side edge portions sandwiching the window are formed by cutting off the outer side portion adjacent to the outer side of the both side edge portions with a press machine. . Therefore, even if there are burrs on the outer portion, the burrs can be removed during cutting by the pressing machine. In other words, since the burr of the ribbon spring can be removed by a pressing machine at the time of manufacturing, the burr is not caught at the time of manufacturing. Therefore, it is possible to prevent distortion at the time of manufacturing and deterioration of processing accuracy due to the catching of the burr.

Further, in the ribbon spring of the sixth aspect of the present invention, since the recessed portions which are recessed inward are formed at the both side edge portions, the bending rigidity of the ribbon spring is reduced and the ribbon spring can be easily bent into a ring shape. Therefore, it can be easily installed in the one-way clutch. Further, since the bending rigidity is reduced, it is possible to suppress the radial extension after being assembled in the one-way clutch, and it is possible to improve the roundness in the assembled state. In addition, the cutting start end portion or the cutting end portion for cutting the outside portion with a pressing machine is formed into a convex shape corresponding to the recess, and the cutting end portion and the next cutting start end portion are sequentially overlapped with each other in the recessed portion. When the edge portion is cut off, there is no uncut portion between the cutting end portion and the cutting start end portion due to the positional displacement of the cutting portion in the vertical and horizontal directions. Therefore, it is possible to prevent burrs from being generated on both side edge portions.

[Brief description of drawings]

FIG. 1 (A) is a plan view illustrating a first embodiment of a method for manufacturing a ribbon spring for a one-way clutch of the present invention, and FIG. 1 (B) is a one-way clutch of the present invention. It is a top view explaining the 2nd example of the manufacturing method of a ribbon spring.

2 (A) is a partial plan view of an embodiment of a ribbon spring for a one-way clutch of the present invention.
(B) is a partial plan view of a modified example of the above embodiment.

FIG. 3 is a plan view partially showing a modified example of the above embodiment.

FIG. 4 (A) is a partial plan view illustrating a conventional method for manufacturing a ribbon spring for a one-way clutch.
4B is a sectional view of a tongue portion of the ribbon spring, and FIG. 4C is a sectional view of a vertical window frame of the ribbon spring.

[Explanation of symbols]

1, 11 ... Strip-shaped plate material, 2, 12 ... Side edge portions, 3, 13,
20 ... Recessed portion, 5, 15 ... Window, 6, 16 ... Side window frame, 7, 1
7 ... Tongue portion, 8, 18 ... Vertical window frame, 7a, 8a, 17a, 1
8a ... Bent portion, 14 ... Slit-shaped cut portion.

Claims (6)

[Claims] 1. A method for manufacturing a ribbon spring for a one-way clutch, comprising: a plurality of windows for fitting an engaging member arranged between an outer ring and an inner ring; and a tongue portion for urging the engaging member in one direction. In the above, the both side edges of the strip-shaped plate material are cut by a press machine, and the central portion of the strip-shaped plate material whose both side edge portions are cut is punched by a press machine, and the window and the longitudinal direction in which the plate material extends are cut out. Forming a tongue portion projecting in the vertical direction from a horizontal window frame extending in the horizontal direction intersecting the direction, the vertical window frame extending in the vertical direction and the tongue portion are substantially perpendicular to the plane in which the plate material extends. A method for manufacturing a ribbon spring for a one-way clutch, which comprises bending in a direction to form a bent portion on the vertical window frame and the tongue portion. 2. The method for manufacturing a ribbon spring for a one-way clutch according to claim 1, wherein both side edges of the strip-shaped plate member are recessed inward from the outer side in the lateral direction in the plate member. To form a recess,
A method for manufacturing a ribbon spring for a one-way clutch, which comprises cutting with a press machine. 3. A method for manufacturing a ribbon spring for a one-way clutch, comprising: a plurality of windows for fitting an engaging member arranged between an outer ring and an inner ring; and a tongue portion for urging the engaging member in one direction. In, the both side edges of the strip-shaped plate material are cut with a press machine, and the portion between the both side edge portions of the strip-shaped plate material is cut with a press machine into a vertical slit shape, so that the plate material extends. Forming at least one slit-shaped cutout portion extending in the longitudinal direction,
The strip-shaped plate member forms a plurality of vertically extending projections extending in the vertical direction, and the plurality of central portions of the double-row projections are punched at the same time with a press machine to form a plurality of windows and the plate member extending vertically. A plurality of tongue portions protruding in the vertical direction are formed from intersecting horizontal window frames extending in the horizontal direction, and the vertical window frame and the tongue portions extending in the vertical direction are substantially perpendicular to a plane in which the plate material extends. A method for manufacturing a ribbon spring for a one-way clutch, which comprises bending in a direction to form a bent portion on the vertical window frame and the tongue portion. 4. The method for manufacturing a ribbon spring for a one-way clutch according to claim 3, wherein both side edge portions of the plate member extending in a strip shape are formed in the plate member by recessing the plate member from the outer side to the inner side in the lateral direction. Cut off with a press machine to form, cut into a slit shape including a convex portion projecting laterally between the both side edges of the strip-shaped plate material, to form the slit-shaped cut portion, A method for manufacturing a ribbon spring for a one-way clutch, characterized in that recesses are formed on both sides of the protrusion so as to be recessed in the lateral direction. 5. A ribbon spring for a one-way clutch, comprising: a plurality of windows for fitting an engaging member arranged between an outer ring and an inner ring; and a tongue portion for urging the engaging member in one direction. A ribbon spring for a one-way clutch, wherein both side edge portions sandwiching the window are formed by cutting an outer portion adjacent to the outer side of the both side edge portions with a press machine. 6. The ribbon spring for a one-way clutch according to claim 5, wherein concave portions recessed inward are formed at the both side edge portions.