JP2007239891A - Reverse input cutoff clutch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an easily miniaturizable inexpensive reverse input cutoff clutch with easily assemblable structure. <P>SOLUTION: The reverse input cutoff clutch is provided with a housing, an input member, an output member, a roller member, and a spring member applying elastic force to the roller member. Rotary driving force is transmitted from the input member to the output member, and torque is not transmitted from the output member to the input member. The spring member has pluralities of spring pieces and lock parts, and the input member is provided with spring lock parts in both ends for locking of the lock parts of the spring member. In the spring member, the locking parts are attached to both ends of the input member by locking to the spring lock parts of the input member, they apply elastic force by holding both ends of the roller member from both sides, and when the input member rotates, the roller member and the spring member rotate together. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a reverse input cutoff clutch in which the rotational driving force from the input side is transmitted to the output side, and the rotational force from the output side is not transmitted to the input side.

There has already been proposed a reverse input cutoff clutch in which a bidirectional driving force from the input side which is the driving side is transmitted to the output side which is the driven side, and a rotational force from the output side is not transmitted to the input side. For example, as an example of a reverse input cutoff clutch in which a bidirectional driving force from the input side is transmitted to the output side and an external force from the output side is not transmitted to the input side, a rotational force is applied to the driven member serving as the output member. And a mechanism that locks the driven side member, and the driven side member cannot be rotated by the lock, and the reverse input cutoff clutch (for example, see Patent Document 1) in which the rotational force from the output side is not transmitted to the input side. It has been proposed and put into practical use.
JP 2000-199532 A

  However, since the reverse input cutoff clutch disclosed in Patent Document 1 has a structure in which a plurality of cam members, clutch teeth, two coil springs, and the like are combined, it is relatively complicated and requires time for assembly work. There is a problem that cost reduction and downsizing cannot be sufficiently performed. Further, because of the structure, if the roller is not made small, the whole becomes too large, so the roller has to be made small, which makes assembly difficult.

  The main object of the present invention is to provide a reverse input shut-off clutch that can be more easily assembled as a structure that can easily maintain a roller member at a fixed position, and that is easy to reduce in size and cost. .

  1st invention is a roller member provided between the housing member, the input member and output member which are mutually intricate with a certain space | interval, and the inner wall surface of the said housing member, and the support surface of the said output member And a first spring member and a second spring member for applying an elastic force to the roller member, a rotational driving force from the input member is transmitted to the output member, and an external force applied to the output member is A reverse input cutoff clutch that is not transmitted to the input member, wherein the roller member has projecting portions projecting from both end surfaces of the support surface of the output member and both end surfaces of the input member, and the first spring member; Each of the second spring members has an annular portion and a plurality of spring pieces extending from the annular portion, and the first spring member is attached to one end side of the input member or the output member, and the roller member of The second spring member is attached to the other end side of the input member or the output member, and gives the elastic force to the other projecting portion of the roller member. The reverse input cutoff clutch is characterized in that the output member, the roller member, and the spring member rotate together when the input member rotates.

  In a second aspect based on the first aspect, the first spring member and the second spring member each have a locking portion, and the input member or the output member is the first spring member. And a spring locking portion that locks the locking portion of the second spring portion at both ends, and the spring member is configured such that the locking portion is locked by the spring locking portion. Provided is a reverse input cutoff clutch which is attached to both ends of an input member or the output member.

  According to a third invention, in the first invention or the second invention, the input member has an input shaft portion and an input engagement portion located at one end of the input shaft portion, and the input engagement thereof. And the output member has an output shaft portion and an output engagement portion positioned on one end side of the output shaft portion, and outputs the output shaft portion. The engaging portion has one or more output engaging pieces extending in the radially outward direction, the distal end surface of the output engaging piece is the supporting surface, and the supporting surface of the output engaging piece is the roller. The width of the member is narrower than the length of the member, the housing member has a cylindrical inner wall surface, and the roller member is located between the bearing surface of the output engagement piece and the cylindrical inner wall surface of the housing member. The input engagement portion or the output engagement portion has the spring locking portions at both ends, and When the force member rotates, the input engagement piece and the output engagement piece mechanically engage with each other so that the output member also rotates together, and when a rotational force is applied to the output member, The reverse input shut-off clutch, wherein the rotational force of the output member is not transmitted to the input member when the roller member bites between the front end surface of the output engagement piece and the cylindrical inner wall surface of the housing member. I will provide a.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the spring locking portion is provided at both ends of the input engagement piece of the input engagement portion or at both ends of the output engagement piece of the output engagement portion. Is provided, and the spring member is locked to both ends of the input member or the output member.

  According to a fifth invention, in any one of the first to fourth inventions, the spring member comprises the annular portion and a spring piece which are integrally formed of a synthetic rubber material or a synthetic resin material. The reverse input cutoff clutch is characterized in that the adjacent spring pieces sandwich the protruding portion of the roller member from both sides.

  According to a sixth invention, in any one of the first to fourth inventions, the spring member is made of a metal spring body including the annular portion and a spring piece, and a synthetic rubber material or a synthetic resin. An auxiliary member for stopping, wherein the metal spring body and the auxiliary member for locking are engaged with each other, and the engaging portion is formed on the auxiliary member for locking. Provide an input cutoff clutch.

  According to a seventh invention, in any one of the first invention to the fourth invention, the spring member is composed of the annular portion made of a metal material and a spring piece, and is related to the input member or the output member. A reverse input cutoff clutch characterized by being stopped or fixed.

  According to an eighth invention, in any one of the first invention to the seventh invention, the spring member includes a pair of spring pieces extending from the annular portion or a plurality of sets at equal intervals. A reverse input cutoff clutch is provided.

  According to a ninth invention, in any one of the first to seventh inventions, the roller member receives an elastic force from both sides or one side by the spring piece of the spring member. A reverse input shut-off clutch is provided.

  According to a tenth aspect of the present invention, there is provided a housing member, an input member and an output member that are intertwined at a certain interval, and a roller member provided between an inner wall surface of the housing member and a support surface of the output member. A reverse input cutoff clutch in which a rotational driving force from the input member is transmitted to the output member, and an external force applied to the output member is not transmitted to the input member, and the input member includes an input shaft portion The input engagement portion is formed of a synthetic rubber material or a synthetic resin material, and is integrally formed with a plurality of input engagement pieces extending at regular intervals in the radial inward direction. The output member includes an output shaft portion and an output engagement portion, and the output engagement portion includes one or more output engagement pieces extending in the radially outward direction. And the front end surface of the output engagement piece is A support surface for supporting the roller member, the housing member having a cylindrical inner wall surface, and the roller member including the support surface of the output engagement piece and the cylindrical inner wall surface of the housing member. When the input member rotates, the input engagement piece mechanically engages with the output engagement piece when the input member rotates. And when the external force is applied to the output member, the roller member bites between the tip end surface of the output engagement piece and the cylindrical inner wall surface of the housing member, and thus the output member is applied. A reverse input cutoff clutch is provided in which an external force is not transmitted to the input member.

  According to an eleventh aspect of the present invention, in any one of the first to tenth aspects, a central protrusion or a central recess is formed at the center of the distal end surface of the output engagement portion, and the input engagement A reverse input blocking clutch is provided in which a central recess for receiving the central protrusion or a central protrusion for receiving the central protrusion is formed at the center of the bottom surface of the joint.

  In a twelfth aspect based on any one of the first aspect to the tenth aspect, two or more input engaging portions of the input member are formed, and the output engaging portion of the output member is 1 Provided is a reverse input cutoff clutch characterized in that it is formed in a number of pieces.

  According to the first aspect of the invention, the driving force is transmitted from the input side which is the driving side to the output side which is the driven side, but the rotational force applied to the output side is transmitted to the input side. Thus, it is possible to provide a reverse input cutoff clutch that is not small and economical. In addition, since the roller member has a length that protrudes from both end surfaces of the support surface of the output member and is configured to hold both protruding portions with a pair of integral spring members, the roller member is constant with a good left-right balance. Can be easily maintained in position. In addition, since the input member and the output member are not fastened to each other by fitting or the like, the input member and the output member can be handled separately, and can be easily incorporated into or removed from the housing.

  According to the second to fourth aspects of the invention, a specific structure of the reverse input cutoff clutch capable of realizing the effect of the first aspect of the invention is proposed, and the integrated spring member is used as the input member or the output. The structure is easy to be locked to the member, and the response and reliability can be improved by the action of the roller member and the spring member.

  According to the fifth to ninth inventions, in addition to the effects of the first invention or the second invention, it is suitable for holding a plurality of roller members at a predetermined position with a good left-right balance. A specific structure of the spring member can be provided.

  According to the ninth aspect, in addition to the effects exhibited by the first to sixth aspects, a more stable operation is possible.

  According to the tenth aspect of the invention, the driving force is transmitted from the input side which is the driving side to the output side which is the driven side, but the rotational force applied to the output side is transmitted to the input side. Thus, it is possible to provide a reverse input cutoff clutch that is not small and economical. In addition, since the input member is made of at least a synthetic rubber material or a synthetic resin material, and the spring portion is formed together when the input member is molded, there is no need to manufacture the spring member separately, and the process of incorporating the spring member is unnecessary. It is possible to obtain a small reverse input shut-off clutch that is excellent in economic efficiency. In addition, since the input member and the output member are not fastened to each other by fitting or the like, the input member and the output member can be handled separately, and can be easily incorporated into or removed from the housing.

  According to the eleventh invention, in addition to the effects of the first to tenth inventions, the input member and the output member can be easily positioned and the input member and the output member can be operated stably. Can be made.

  According to the twelfth aspect of the present invention, in addition to the effects exhibited by the first to eleventh aspects of the present invention, the output engagement portion and the roller member depend on the rotational driving force or the magnitude of the rotational force from the output side. The number can be arbitrarily selected.

[Embodiment 1]
The reverse input cutoff clutch 100 of Embodiment 1 which concerns on this invention with FIG. 1 thru | or 15 is demonstrated. FIG. 1 is a view showing the appearance of the reverse input cutoff clutch 100, and FIG. 2 is a view showing a housing member of the reverse input cutoff clutch 100. FIG. 3 is a diagram for explaining the input member, and FIG. 4 is a diagram for explaining the output member. FIG. 5 is a view of a structure formed by combining an input member, an output member, and a spring member of the reverse input cutoff clutch 100 as viewed from the front side. FIG. 6 is a front view of a structure formed by combining the input member, the output member, and the roller member of the reverse input cutoff clutch 100. FIG. 7 is a front view of the reverse input cutoff clutch 100. FIG. 8 is a side view of a part of FIG. 9 to 12 are views for explaining a spring member used in the reverse input cutoff clutch 100. FIG. 13 to 15 are views for explaining the operation of the reverse input cutoff clutch 100. FIG.

  This reverse input cutoff clutch 100 is mainly composed of a housing 1 as shown in FIGS. 1 and 2, an input member 3 as shown in FIG. 3, an output member 5 as shown in FIG. 6 and the like, and roller members 71 to 74 shown in FIG. 6 and the like, and spring members 80 and 90 shown in FIGS. The housing 1 includes a housing member 11 and a lid portion 12. The housing member 11 includes a cylindrical portion 14 having a cylindrical inner wall surface 13 and a side wall portion 15 that functions as a bottom portion that closes one end of the cylindrical portion 14. The side wall portion 15 has a through hole 16 at the center and a short cylindrical lead-out portion 17 surrounding the through hole 16. Although not shown in the drawing, the lead-out portion 17 is provided with an oil-impregnated metal in which oil is impregnated into a sintered metal, or a rotation promoting member such as a small ball bearing or roller bearing. The housing 1 is made of various metal materials, engineering plastic materials, or the like, and there is no need to limit the materials.

  The input member 3 will be described with reference to FIGS. 3 (A), 3 (B), and 3 (C). FIG. 3A is a perspective view of the input member 3. FIG. 3B is a top view of the input member 3 shown in FIG. 3A viewed from above, and FIG. 3C is a bottom view of the input member 3 viewed from below. The through-hole 16 of the side wall 15 in the housing 1 is inserted, and the cylindrical input shaft 31 having a diameter slightly smaller than the diameter of the through-hole, and the input shaft 31 fixed to one end of the input shaft 31 or the input shaft 31 And an input engaging portion 32 formed integrally. The input engagement portion 32 has an input shaft that is equidistant from each corner of the regular pentagonal common portion 33 that spreads radially outward with the tip of the input shaft portion 31 at the center, and the regular pentagonal common portion 33. It consists of five input engaging pieces 34, 35, 36, 37, 38 extending in the extending direction and the outward direction of the portion 31. The five input engagement pieces 34 to 38 have the same shape and the same size. Therefore, all the gaps between the adjacent input engagement pieces are substantially the same.

  As shown in FIGS. 3A and 3B, on the upper surfaces of the five input engagement pieces 34, 35, 36, 37, 38, spring engaging portions 34a for attaching spring members to be described later, 35a, 36a, 37a, 38a are provided. As shown in FIG. 3C, spring engaging portions 34b, 35b, 36b, 37b, 38b for attaching spring members to be described later are provided on the lower surfaces of the five input engaging pieces 34-38. Yes. The spring locking portions 34a, 35a, 36a, 37a, 38a and the spring locking portions 34b, 35b, 36b, 37b, 38b are formed at positions facing each other, and spring members to be described later are spring locking portions 34a to 34a. 38a and spring locking portions 34b to 38b can be locked. The spring locking portions 34a to 38a and the spring locking portions 34b to 38b are small holes having a predetermined depth and diameter.

  The input engagement pieces 34, 35, 36, 37, and 38 each have an arcuate outer wall surface A and an arcuate inner wall surface B. The five arcuate inner wall surfaces B are determined by the size of five output engagement pieces of the output member 5 described later, and the arcuate inner wall surface B does not contact the five output engagement pieces and has a predetermined interval. It is such a size. Therefore, the five arcuate inner wall surfaces B of the input engagement pieces 34 to 38 shown in FIG. 3 form a space S that matches an output engagement portion 52 of the output portion 5 described later. Further, a central recess 39 for positioning the output member 5 is formed at the center of the regular pentagonal common portion 33. Here, the diameter of the imaginary circle formed by the five arcuate outer wall surfaces A of the input engagement pieces 34 to 38 is cylindrical in the housing member 11 so that the input member 3 can stably rotate in the housing 1. It is preferable that the diameter is slightly smaller than the diameter of the cylindrical inner wall surface 13 of the portion 14. Further, the maximum diameter of the regular pentagonal common portion 33 is the cylinder of the cylindrical portion 14 of the housing member 11 so that the input member 3 can rotate without any problem in the housing 1 as well. It is smaller than the diameter of the inner wall surface 13.

  As shown in FIGS. 4A, 4 </ b> B, and 4 </ b> C, the output member 5 is a columnar output having a diameter that passes through a through hole (not shown) of the lid portion 12 in the housing 1 shown in FIG. 1. A shaft 51 and an output engaging portion 52 that is integrally formed with the output shaft 51 or fixed by screwing or the like are provided at one end of the output shaft 51. 4A is a perspective view of the output member, FIG. 4B is a side view of the output member 5 viewed from the side, and FIG. 4C is a bottom view of the input member 3 viewed from below. . The output engagement portion 52 has five output engagement pieces 53, 54, 55, 56, 57 extending at equal intervals in the radially outward direction with the tip of the output shaft portion 51 as the center. A central projection 58 for positioning is provided at the center of the output engagement portion 52. The central protrusion 58 is inserted into the central recess 39 of the regular pentagonal common portion 33 to position the input engaging portion 32 and the output engaging portion 52 and to stabilize the input member 3 and the output member 5. It operates so that it can operate on the same axis. The five output engagement pieces 53 to 57 have the same shape and the same size. When the output engagement portion 52 is disposed in the space S formed by the input engagement pieces 34 to 38, at least the tip portions of the five output engagement pieces 53 to 57 are adjacent to the adjacent input engagement pieces 34 to 38. It is located at an interval between the side surface C and the side surface C adjacent to each other. The front end surfaces 53A, 54A, 55A, 56A, and 57A of the five output engagement pieces 53, 54, 55, 56, and 57 are gently curved, V-shaped, or flat, as shown in FIG. For example, a bearing surface that supports the roller member 71 is formed as indicated by a chain line in FIG. Although not shown, a center protrusion is provided at the position of the central recess 39 of the input engagement portion 32, and the center protrusion is received at the position of the center protrusion 58 of the output engagement portion 52. You may have a recess. Further, contrary to FIG. 1, the output member 5 may be positioned on the bottom side of the housing 1 and the input member 3 may be positioned on the lid 12 side.

  Next, a state where the input member 3 and the output member 5 as described above are incorporated into the housing 1 will be described. FIG. 5 is a view seen from the bottom side of the housing 1 and shows the cylindrical portion 14 from which the bottom portion of the housing member 11 is removed. 5 is the bottom of the housing member 11, and the first spring member 80 is formed by the spring engaging portions 34b, 35b, 36b, 37b, 38b of the input engagement pieces 34 to 38 in the input member 3 shown in FIG. Is attached to one end face on the bottom side of the input engaging portion 32. The integrally formed spring member 80 will be described in detail later. A through hole formed in the side wall portion 15 that functions as a bottom portion of the input shaft portion 31 as shown in FIG. 1, with the spring member 80 attached to the end surface of the input engaging portion 32 on the input shaft portion 31 side in advance. 16 is derived. Next, the output engagement portion 52 of the output member 5 is inserted into the cylindrical portion 14 of the housing member 11 from the back side of the sheet of FIG. 5, and the five output engagement pieces 53, 54, 55, 56 of the output engagement portion 52 are inserted. , 57 are adjusted so as to be positioned approximately in the middle between adjacent ones of the input engaging pieces 34, 35, 36, 37, 38 of the input engaging portion 32, respectively. The roller members 71 to 75 are inserted between the front end surfaces 53A, 54A, 55A, 56A, 57A and the cylindrical inner wall surface 13 of the cylindrical portion 14. At this time, it arrange | positions so that the one end side of the cylindrical surface of the roller members 71-75 may be pinched | interposed by a pair of spring piece of the spring member 80, respectively. 6 shows the state of the back side of FIG. 5, that is, the front side of the drawing. The spring member 80 shown in FIG. 5 located on the bottom side of the housing member 11 becomes complicated and difficult to understand. Not shown.

  The second spring member 90 is connected to the input engagement pieces 34 to 38 by using the spring engaging portions 34a, 35a, 36a, 37a, 38a formed on the input engagement pieces 34 to 38 shown in FIG. It is attached to the other end. Accordingly, the spring members 80 and 90 are locked to both end surfaces of the input locking portion 32. Although only the roller member 75 positioned between the input engagement pieces 34 and 38 is shown in FIG. 8, the same applies to the other members, and only portions related to the roller member 75 will be described. FIG. 8 is an explanatory view of a part including the input engagement pieces 34 and 38 as viewed from the side. Both end portions of the roller member 75 protrude from the input engaging pieces 34 and 38 and the output engaging piece 53 on which the roller member 75 is supported, and the protruding portions 75A and 75B at both ends are respectively connected to the first spring member 80. The spring piece of the second spring member 90 is gripped. That is, the roller member 75 has a length larger than the width of the input engagement pieces 34 and 38 and the output engagement piece 53, and a long portion thereof protrudes from the input engagement pieces 34 and 38 and the output engagement piece 53, The first spring member 80 and the second spring member 90 elastically hold the protrusions 75A and 75B with a good left / right balance. As shown in FIG. 7, the roller members 71 to 75 are held approximately at the center of the respective gaps between the adjacent input engagement pieces 34 to 38 by the spring member 90 and the spring member 80 on the back side of the paper. In the state of FIG. 7, each roller member 71 to 75 is in light contact with the cylindrical inner wall surface 13 of the cylindrical portion 14 of the housing member 11, and can be easily inserted into and removed from the cylindrical portion 14 of the housing member 11. Contact. Although the operation of the reverse input cutoff clutch will be described later, when the input member 3 rotates, the roller members 71 to 75 also rotate together with the output member 5 with a small frictional resistance.

  Next, an example of the first spring member 80 and the second spring member 90 will be described with reference to FIGS. Since the spring member 80 and the spring member 90 have the same structure, the spring member 80 will be described. FIG. 9 shows the original shape of a spring member punched by pressing a metal plate, and FIG. 10 shows the shape of a metal spring body 80A bent into a predetermined shape. 11 shows a resin-made locking auxiliary member 80B combined with the metal spring body 80A, and FIG. 12 shows a combination of the metal spring body 80A shown in FIG. 10 and the locking auxiliary member 80B shown in FIG. A spring member 80 is shown. As shown in FIG. 9, an example of the original shape of the metal spring body includes an annular portion 81 and five metal pieces 82 extending radially outward from the annular portion 81 at equal intervals. Since the five metal pieces 82 have the same structure, only one will be described. The metal piece 82 includes a first portion 82A extending from the annular portion 81, a second portion 82B extending from the first portion 82A, and a third portion 82C. There is a predetermined distance R between the second portion 82B and the third portion 82C. First, the second portion 82B is bent at a point a and the third portion 82C is bent at a point b corresponding to the point a so as to form an angle θ1 shown in FIG. 10, and then the second portion 82B is bent at a point c. Then, after the third portion 82C is bent at a point d corresponding to the point c to form an angle θ2, the second portion 82B and the third portion 82C are bifurcated from the first portion 82A. Then, it is bent so as to be substantially perpendicular to the front side or the back side. By this bending step, the original shape of the metal spring body shown in FIG. 9 becomes the metal spring body 80A shown in FIG. Since the second part 82B and the third part 82C bent as shown in FIG. 10 have a spring force and provide an elastic force to the roller member, they are hereinafter referred to as spring pieces. The shape and bending method of the illustrated metal spring body 80A are merely examples, and are not limited to these specific examples.

  The auxiliary member for locking 80B shown in FIG. 11 is combined with the metal spring body 80A to constitute the spring member 80. 11A is a top view of the locking auxiliary member 80B as viewed from above, FIG. 11B is a side view thereof, and FIG. 11C is a bottom view of the locking auxiliary member 80B as viewed from below. FIG. 11D is an enlarged view of the locking portion. The locking auxiliary member 80B is made of an elastic synthetic rubber material or synthetic resin, aluminum, or the like, and includes an annular portion 85 and five locking portions 86 formed at substantially equal intervals. For example, when the locking auxiliary member 80B is made of aluminum, it is formed by a processing method such as casting or aluminum die casting in which molten aluminum is poured into a mold. The annular portion 85 has a width that is somewhat wider than the radial width of the annular portion 81 of the metal spring body 80A. All of the five locking portions 86 have the same structure, and each locking portion 86 protrudes from the annular portion 81 in the radially outward direction from one surface of the tip portion of the first portion 86A and the first portion 86A. A short pin-shaped second portion 86B extending at a substantially right angle, that is, a right angle to the paper surface, and an incision 86C and an incision 86D cut into the annular portions 85 on both sides of the first portion 86A from the outside to the inside. It consists of. The cuts 86C and 86D increase the elasticity of the first portion 86A and are not necessarily required. The short pin-shaped second portions 86B of the five locking portions 86 are formed by the spring locking portions 34b, 35b, 36b of the input engagement pieces 34, 35, 36, 37, 38 in the input portion shown in FIG. It is engaged with 37b, 38b. Therefore, the diameter of a virtual circle connecting the spring engaging portions 34b, 35b, 36b, 37b, 38b of the input engaging pieces 34, 35, 36, 37, 38, and the short pin-like first of the five engaging portions 86 The diameter of the virtual circle connecting the two portions 86B must be equal. The locking auxiliary member 80B is deformed in accordance with the shape of the metal spring body 80A, and is not limited to the illustrated specific example.

  As shown in FIG. 12, a metal spring body 80A and a resin-made locking auxiliary member 80B are combined. As described above, there is a predetermined distance R (FIG. 9) between the second portion 82B and the third portion 82C of the metal spring body 80A, and the diameter of the short pin-shaped second portion 86B is as follows. Since it is set somewhat larger than the interval R, the five short pin-shaped second portions 86B are arranged between the five second portions 82B and the third portions 82C of the metal spring body 80A, respectively. By inserting, the resin-made locking auxiliary member 80B is easily locked to the metal spring body 80A. That is, the five short pin-shaped second portions 86B of the locking auxiliary member 80B are sandwiched between the second portion 82B and the third portion 82C of the metal spring body 80A. It is not easily separated from the locking auxiliary member 80B. Further, the second portion 86B functions to narrow the space between the tip of the second portion 82B and the tip of the third portion 82C, so that the spring property of the spring body 80 can be improved even if there is a variation such as bending. This is also effective in this aspect. The second spring body 90 used in the first embodiment has the same structure as the first spring body 80.

  In order to lock the first spring body 80 to the end face of the input engagement portion 32 shown in FIG. 3C, the spring engagement portions 34b, 35b of the input engagement pieces 34, 35, 36, 37, 38 are used. , 36b, 37b, and 38b, the five short pin-shaped second portions 86B of the locking auxiliary member 80B in the first spring body 80 are locked. The spring engaging portions 34b, 35b, 36b, 37b, and 38b are small holes having a predetermined diameter and depth, and it is only necessary to insert the five short pin-shaped second portions 86B into each other, that is, to engage each other. It is only necessary to stop, and the shape is not limited. The same applies to the case where the second spring body 90 is locked to the end face of the input engagement portion 32 shown in FIG. 3B, and the input engagement pieces 34, 35, shown in FIG. As shown in FIG. 7, if the short pin-shaped second portion of the locking portion (not shown) is inserted into the spring locking portions 34a, 35a, 36a, 37a, 38a formed on 36, 37, 38, Become. The tip portions P1 and P2 (FIG. 12) of the first spring body 80 and the second spring body 90 are partially shown in FIG. The roller member 71 is gripped by an elastic force so as to sandwich 71A and 71B). Accordingly, each of the roller members 71 to 75 is held at a substantially intermediate position in the gap between the adjacent input engagement pieces 34 to 38. In this state, the input member 3, the output member 5, the roller members 71 to 75, and the spring body 80. The spring body 90 can freely rotate in the cylindrical portion 14 of the housing member 11. The roller members 71 to 75 may be mounted either before or after the second spring body 90 is locked to the input member 3. What is necessary is just to adjust so that the front-end | tip parts P1 and P2 of the 1st spring body 80 and the 2nd spring body 90 may hold | grip the protrusion part of the both ends of the roller members 71-75. Finally, the output shaft portion 51 of the output member 5 is inserted into the hole of the lid portion 12 as a shield member, and the lid portion 12 is fixed to the housing member 11. Various methods such as fitting and spot welding can be considered.

  The operation of the reverse input cut-off clutch 100 will be described with reference to FIGS. 7 and 13 to 15 showing the state before the housing member 11 is closed with the lid 12. FIG. 13 is an enlarged view of a part of FIG. 7 and shows a stationary state in which no rotational force is applied to the input member 3 and the output member 5. FIG. 14 shows a state in which a counterclockwise rotational force is applied to the input member 3, and FIG. 15 shows a state in which a rotational force is applied to the output member 5. When no external force is applied to either the input member 3 or the output member 5, each roller member 71 to 75 is elastic from both sides by the first spring body 80 and the tip portions P 1 and P 2 of the second spring body 90. Is receiving. Since these roller members 71 to 75 all operate in substantially the same state, the roller member 75, the spring pieces 82B and 82C of the second spring body 90 shown in FIGS. The input engagement piece 38, the output engagement piece 53, and members related thereto will be described. When no external force is applied to either the input member 3 or the output member 5, the roller member 71 is gripped by the elastic force between the distal end portion P1 of the spring piece 82B and the distal end portion P2 (FIG. 12) of the spring piece 82C. 13 to 15, the following gap is not shown in FIG. 13 to FIG. 15, but actually, the gap between the lower end surface of the roller member 75 and the support surface 53 </ b> A of the output engagement piece 53, or the upper end surface of the roller member 75. There is a minute gap between the cylindrical inner wall surface 13 of the housing member 11.

  First, when the input member 3 rotates counterclockwise, the input engaging pieces 34 and 38 move to the left in FIG. 14 from the state shown in FIG. 14, and the left side surface X of the input engaging piece 34 moves. The output engaging piece 53 and the roller member 75 are brought into contact with the output engaging piece 53 and the roller member 75, and the output engaging piece 53 and the roller member 75 are pushed counterclockwise (leftward in the drawing). The operation at this time will be described in detail. The output engagement piece 53 is moved until the input engagement piece 34 moves to the left in the drawing and the left end surface X of the input engagement piece 34 contacts the right end surface Y of the output engagement piece 53. Does not move. That is, the output engagement piece 53 does not move until it is pushed by the input engagement piece 34, so that the space between the cylindrical inner wall surface 13 of the cylindrical portion 14 of the housing member 11 and the front end surface 53 </ b> A of the output engagement piece 53. The distance does not change, and the distance moved until the left end surface X of the input engagement piece 34 abuts on the right end surface Y of the output engagement piece 53 is small. Therefore, in this range, the distance of the movement of the roller member 75 due to the contraction of the spring pieces 82B of both the spring body 80 and the spring body 90 is very small, and the cylindrical inner wall surface 13 of the cylindrical portion 14 of the housing member 11 and the output member. The positional relationship of the roller member 75 with respect to the distal end surface 53A of the combined piece 53 is substantially the same as that in the stationary state.

  This indicates that the roller member 75 is positioned substantially at the center of the front end surface 53A of the output engagement piece 53. Therefore, even when the left end surface X of the input engagement piece 34 is in contact with the right end surface Y of the output engagement piece 53, the roller member 75 is connected to the distal end surface 53 A of the output engagement piece 53 and the cylindrical portion 14 of the housing member 11. It does not bite into the cylindrical inner wall surface 13. The same applies to the other roller members. That is, the input engagement pieces 34 to 38 rotate so as to press the output engagement pieces 53 to 57 and the roller members 71 to 75, and the output member 5 and the roller member 75 are moved together with the input member 3 with respect to the housing 1. Can rotate freely. The same is true for clockwise rotation. Therefore, when the input member 3 rotates in any direction, the input engagement pieces 34 to 38 are mechanically coupled to the corresponding output engagement pieces 53 to 57 of the output member 5, but the roller members 71 to 75 are connected. Is positioned substantially at the center of each of the front end surfaces 53A to 57A of the output engagement pieces 53 to 57, so that the roller members 71 to 75 are respectively connected to the front end surfaces of the output engagement pieces 53 to 57 and the cylindrical inner wall surface of the housing member 11. The output member 5 rotates together with the input member 3 and the rotational force applied to the input member 3 is transmitted to the output member 5. This is exactly the same except that the direction is different even when the input member 3 rotates clockwise.

  Next, FIG. 15 shows a case where a counterclockwise force is applied to the output member 5 in a stationary state where no rotational force is applied to either the input member 3 or the output member 5 shown in FIG. explain. When a rotational force is applied to the output member 5 in the counterclockwise direction, the output engagement piece 53 moves to the left in the drawing. At this time, as described above, since the roller member 75 is pressed in the opposite direction by the spring pieces 82C of the spring body 80 and the spring body 90, as shown in FIG. Or even if it moves as shown in FIG. Accordingly, as the output engagement piece 53 moves in the left direction in the drawing, the roller member 75 comes to position the front end surface 53A of the output engagement piece 53 in the right direction in the drawing, and the front end surface 53A of the output engagement piece 53 Since the gap between the right end side of the housing member 11 and the cylindrical inner wall surface 13 of the housing member 11 is narrowed, that is, on the end side compared to the center of the front end surface 53A of the output engagement piece 53, Since the gap between the end side and the cylindrical inner wall surface 13 of the housing member 11 is narrower than the diameter of the roller member 75, the roller member 75 is on the end side of the front end surface 53A of the output engagement piece 53, and the front end surface 53A. And the cylindrical inner wall surface 13 of the housing member 11 is in a locked state before the left end surface Y ′ of the output engagement piece 53 contacts the right end surface X ′ of the input engagement piece 38. The same applies to the other output engagement pieces 54 to 57. Therefore, the output member 5 can no longer rotate, and the output engagement pieces 53 to 57 of the output member 5 do not contact the input engagement pieces 34 to 38, and the rotational force applied to the output member 5 is the input member. 3 is not transmitted. This is exactly the same when the output member 5 rotates clockwise. Further, when a clockwise force is applied to the output member 5 in this locked state, in FIG. 15, the output engagement piece 53 inclines in the right direction opposite to the illustration, and the left end of the front end surface 53 </ b> A of the output engagement piece 53. The roller member 75 bites between the side and the cylindrical inner wall surface 13 of the housing member 11 and is also locked.

  Next, if a counterclockwise rotational force (left direction in the drawing) is applied to the input member 3 in the locked state as shown in FIG. 15, the input engagement pieces 34 and 38 move in the left direction in the drawing. The left end surface X of the combined piece 34 abuts on the roller member 75 and returns the roller member 75 to the substantially center of the front end surface 53A of the output engagement piece 53, whereby the lower end surface of the roller member 75 and the front end of the output engagement piece 53 are obtained. A minute gap is formed between the surface 53A or the upper end surface of the roller member 75 and the cylindrical inner wall surface 13 of the housing member 11, and the locked state is released. Subsequently, the input engagement piece 34 is output. The output member 5 rotates together with the input member 3 by contacting the engaging piece 53 and applying a rotational force. On the other hand, assuming that a clockwise rotational force (rightward in the drawing) is applied to the input member 3 when the input member 3 is in the locked state as described above, the input engagement pieces 34 and 38 move in the clockwise direction, thereby causing the spring body 80 and the spring to move. The spring piece 82C of the body 90 contracts, and first, the right end surface X ′ of the input engagement piece 34 comes into contact with the left end surface Y ′ of the output engagement piece 53, and the output engagement piece 53 is moved clockwise to bring the locked state. To release. The relationship between the other input engagement pieces 35 to 38 and the output engagement pieces 54 to 57 is the same, and the input member 3 rotates the output member 5 and the roller member 75 together in the clockwise direction. Accordingly, the rotational force of the input member 3 is transmitted to the output member 5 regardless of which direction of rotational force is applied to the input member 3 in the locked state. However, in any rotation direction, the external force applied to the output member 5 is such that the roller members 71 to 75 bite between the front end surface of each output engagement piece and the cylindrical inner wall surface 13 of the housing member 11 and become locked. This is not transmitted to the input member 3.

[Embodiment 2]
A reverse input cutoff clutch 200 according to the second embodiment will be described with reference to FIGS. FIG. 16 shows the input member 3, the output member 5, and the roller members 71 to 75. FIG. 17 shows an integral spring member formed by resin molding, and FIG. 18 shows a front view of the reverse input cutoff clutch 200. FIG. 19 shows a side view of a part of the input side engaging piece, the output engaging piece, the roller member, and the like, and FIG. 20 shows an assembled structure excluding the housing. 16 to 20, the same symbols as those used in FIGS. 1 to 15 indicate members having similar names. Since the structure of the output member 5 and the roller members 71 to 75 is the same as that of the first embodiment, the description thereof is omitted. Although the basic structure of the input member 3 is the same as that of the first embodiment, the specific structures of the spring engaging portions 34a to 38a formed on the input side engaging pieces 34, 35, 36, 37, and 38 are different. As in the first embodiment, unillustrated spring locking portions 34b to 38b are formed at corresponding positions of the spring locking portions 34a to 38a on the back side of the drawing of the input side engaging pieces 34, 35, 36, 37, and 38. Has been. In FIG. 19, only the spring locking portion 34b of the input side engagement piece 34 and the spring locking portion 38b of the input side engagement piece 38 are shown, but the other is the same. Specifically, the spring engaging portions 34a to 38a and the spring engaging portions 34b to 38b of the input side engaging pieces 34 to 38 in the first embodiment are small holes, but in the second embodiment, these spring engaging portions are used. 34a-38a and spring latching | locking part 34b-38b consist of a protrusion part suitable for latching spring member 80 ', 90'. These spring locking portions will be described later.

  The spring member 80 ′ and the spring member 90 ′ used in the reverse input cut-off clutch 200 are formed of an integral spring member formed by molding a synthetic resin having relatively excellent elasticity. In the second embodiment, the spring member 80 ′ and the spring are combined. Since the member 90 ′ has the same structure, only the spring member 80 ′ will be described. As shown in FIG. 17, the spring member 80 ′ extends radially outward from the regular pentagonal annular portion 81 ′ and the side portion 81 ′ A corresponding to each side of the regular pentagonal annular portion 81 ′. It consists of five pairs of spring pieces 82 'and spring pieces 83'. Five corner portions 81'B of the regular pentagonal annular portion 81 'are engaged with the spring engaging portions 34a to 38a and the spring engaging portions 34b to 38b of the input side engaging pieces 34 to 38. The spring pieces 82 ′ and the spring pieces 83 ′ are substantially parallel to each other, and the distance between them is somewhat smaller than the diameter of the roller members 71 to 75. Therefore, when the roller members 71 to 75 are mounted, as shown in FIG. 18, the spring pieces 82 'and the spring pieces 83' are somewhat open from the base toward the tip, and as a result, the respective rollers The members 71 to 75 are given elastic force from both sides. Further, the roots of the five pairs of spring pieces 82 'and spring pieces 83' protrude to the inner peripheral side at portions 81'A corresponding to the sides of the regular pentagonal annular portion 81 '. The inner peripheral surface M of the two corners 81′B has a shape that is arcuately outward and recessed from the base of the spring piece 82 ′ and the spring piece 83 ′. The inner peripheral surface M improves the elasticity of the regular pentagonal annular portion 81 ′. In addition, the portions F (FIG. 17) for gripping the roller members 71 to 75 in the spring pieces 82 ′ and 83 ′ are somewhat recessed as compared with the others, so that the roller members 71 to 75 can be gripped stably. It has become.

  The input side engaging pieces 34 to 38 have an input so that the spring engaging portions 34a to 38a and the spring engaging portions 34b to 38b are equal to or slightly higher than the thickness of the spring members 80 'and 90'. Although it is preferable that it protrudes from the end surfaces of the side engaging pieces 34 to 38, it may be lower as long as they are locked together. Then, the spring locking portions 34a to 38a and the spring locking portions 34b to 38b are used to stably lock the five corner portions 81′B of the regular pentagonal annular portion 81 ′ of the spring member 80 ′. The inner surface N has a shape that conforms to the shape of the corner portion 81′B, that is, a shape having an angle substantially equal to the angle of the corner portion 81′B. By pressing the spring member 80 ′ into the spring locking portions 34b to 38b and the spring member 90 ′ into the spring locking portions 34a to 38a, the elasticity of the spring members 80 ′ and 90 ′ is easily achieved. Can be locked to each other. In FIG. 18, the spring member 80 ′ locked to the back side of the drawing of the input side engagement pieces 34 to 38 of the input member 3 is not shown, but as shown in FIG. 19 for the roller member 75, One end portion of the roller member 75 is elastically gripped by the spring piece 82 ′ and the spring piece 83 ′ of the spring member 80 ′, and one end portion of the roller member 75 is connected to the spring piece 82 ′ of the spring member 80 ′. The spring piece 83 'is gripped elastically.

  FIG. 20 shows a combined structural diagram in which the members are combined. The housing 1 is not shown. The input shaft portion 31 shown in FIG. 3 can be attached to and detached from the regular pentagonal common portion 33. In FIG. 20, the input shaft portion 31 is not yet attached to the input engagement portion 32. The structure is mounted after being housed in the housing 1. Of course, the output shaft portion 51 may be structured to be detachable from the output engagement portion 52 in the same manner. Although the detachable structure is not shown, a general detachable structure such as fitting or screwing may be used. The operation of the reverse input cutoff clutch 200 of the second embodiment is exactly the same as that of the reverse input cutoff clutch 100, and will not be described in detail. However, when the input member 3 rotates in either direction, the output member 5 and the roller members 71 to 75 , And the spring member 80 ′ and the spring member 90 ′ also rotate together with the input member. Therefore, the external force applied to the input member 3 is transmitted to the output member 5. When a rotational force in any direction is applied to the output member 5, the output member 5 tries to rotate, but when at least slightly moved, each roller member 71 to 75 has a cylindrical inner wall surface of the cylindrical portion 14 of the housing member 11. 13 and the front end surfaces (support surfaces) 53A to 57A of the output engagement pieces 53 to 57 of the output engagement pieces 53 to 57, and the output engagement pieces 53 to 57 enter the input engagement pieces 34 to 38 of the input member 3. Locked before touching. Therefore, the external force applied to the output member 5 is not transmitted to the input member 3.

[Embodiment 3]
In the first and second embodiments described above, both end sides of the roller members 71 to 75 are held from both sides by a pair of spring pieces, respectively, but it is also possible to apply an elastic force in one direction with each one spring piece. The reverse input cutoff clutch 300 (1) and the reverse input cutoff clutch 300 (2) according to the third embodiment will be described with reference to FIGS. The reverse input cutoff clutch 300 (1) uses a spring member basically similar to the structure used in the reverse input cutoff clutch 100 according to the first embodiment, and the reverse input cutoff clutch 300 (2) according to the second embodiment. A resin-molded spring member that is basically similar to the structure used in the reverse input cutoff clutch 200 is used. In the reverse input cutoff clutch 300 (1) and the reverse input cutoff clutch 300 (2), the spring pieces are arranged so that the elastic force of the spring member as a whole is balanced in both the left and right directions in the drawing. The reverse input cutoff function similar to the reverse input cutoff clutch 100 and the input cutoff clutch 200 described above can be realized. According to the reverse input cut-off clutch 300 (1), 300 (2), the spring member always applies a force from one direction to each roller member 71 to 75 in the stationary state, so that it is in a state of being engaged in both directions. Therefore, when a force is applied to the input member 3, the force can be quickly transmitted to the output member 5 without play. 21 and 22, the same symbols as those used in FIGS. 1 to 20 indicate members having similar names.

  First, the reverse input cutoff clutch 300 (1) will be briefly described with reference to FIG. The spring member 80 (90) is the same as the reverse input cutoff clutch 100 except that the spring member 80 (90) is different from the spring member 80 (90) used in the first embodiment, and the number of roller members is one, and therefore only the different points will be described. To do. Although the spring member 80 and the spring member 90 are not shown in detail, a metal spring body similar to the metal spring body as shown in FIG. 10 and an annular locking auxiliary member as shown in FIG. The metal spring body includes a spring piece 82B for applying a clockwise elastic force to the roller member 75, a spring piece 82C for applying a counterclockwise elastic force to the roller member 74, and a counterclockwise direction to the roller member 71. A spring piece 82C for applying an elastic force and a spring piece 82B for applying a clockwise elastic force to the roller member 73 are provided. No roller member is disposed on the output engagement piece 55 located between the input engagement pieces 35 and 36. Therefore, the reverse input shut-off clutch 300 (1) uses four roller members, and each of the spring pieces 82B gives a counterclockwise elastic force to the roller members 71 and 74. Each spring piece 82B gives a clockwise elastic force, so that the balance of the bidirectional elastic force is maintained. Since the reverse input cutoff clutch 300 (1) operates in the same manner as the reverse input cutoff clutch 100 of the first embodiment, the operation is omitted.

  Next, the reverse input cutoff clutch 300 (2) will be briefly described with reference to FIG. 22. The spring member 80 ′ (90 ′) is different from the spring member 80 ′ (90 ′) used in the second embodiment, and the roller member. Is the same as the reverse input cut-off clutch 200 except that there is one less. Although the spring member 80 ′ and the spring member 90 ′ are not shown in detail, the spring member 80 ′ and the spring member 90 ′ are made of a spring member similar to the integrated spring member formed by resin molding as shown in FIG. As shown, it has four spring pieces 82 ′ and spring pieces 83 ′, which is different from that shown in FIG. The reverse input shut-off clutch 300 (2) uses four roller members. Each of the spring members 83 'gives a counterclockwise elastic force to the roller members 71 and 74, and the roller members 73 and 75 have Each spring piece 82 ′ imparts a clockwise elastic force so that the elastic force is balanced. The spring member 90 ′ having the same structure as the spring member 80 ′ is locked by the spring locking portions 34 a to 38 a of the input side engaging pieces 34 to 38 as in the second embodiment. Since this reverse input cutoff clutch 300 (2) also operates in the same manner as the reverse input cutoff clutch 100 of the second embodiment, the operation is omitted.

[Embodiment 4]
In the first to third embodiments described above, the spring members 80, 80 ′ and the spring members 90, 90 ′ are connected to the spring engaging portions 34 a to 38 a and the spring engaging portions 34 b of the input side engaging pieces 34 to 38 in the input member 3. Although it locked using -38b, in this Embodiment 4, a spring member is fixed to an input side engagement piece by welding, without providing spring locking part 34a-38a and spring locking part 34b-38b. It is characterized by. Therefore, in the fourth embodiment, the metal spring body 80A as shown in FIG. 10 is used as the first spring member 80 and the second spring member 90. In FIG. 23, only a part of the front view of the reverse input cutoff clutch 400 according to the fourth embodiment is shown, but the other parts are also the same. In FIG. 23, the symbols used in FIGS. 1 to 22 indicate members having the same name. Since the first spring member 80 and the second spring member 90 have the same structure, the welding of the spring member 80 will be described. In FIG. 23, the first portion 82A extending from the annular portion 81 of the spring member 80 shown in FIG. 10 at substantially equal intervals is projection welded to the input side engaging pieces 34 and 38. The same applies to the other input side engagement pieces 35 to 37. The welded part is indicated by a black circle W. Although not shown, preferably, projections having a height of about 0.3 to 0.8 mm are formed at the welding points W of the first portions 82A, and the welding current is concentrated on the projections during welding. And resistance welding. As a preferred example of this resistance welding method, the electric energy stored in the capacitor is discharged in a short time, for example, several tens of milliseconds or less, so that a pulsed welding current is supplied to the input side engagement pieces 34 to 38 and the spring member. Capacitor storage type resistance welding, in which resistance welding is performed by flowing between the two, is effective. According to this welding method, it is possible to easily obtain a desired welding strength with little thermal influence on other parts. it can. In addition, the spring member 90 is welded to the other surface of the input side engaging pieces 34 to 38 as described above.

[Embodiment 5]
In the fourth embodiment described above, the spring member 80 and the spring member 90 are welded to the input side engagement pieces 34 to 38 in the input member 3, but in the reverse input cutoff clutch 500 of the fifth embodiment, the spring member 80 and the spring member are used. It is greatly different that 90 is fixed to both ends of the output side engagement pieces 55 to 57 by resistance welding or the like. Since the welding method is the same as that of the fourth embodiment, the description thereof will be omitted. However, as shown in FIG. 24, the annular portion 81 of the spring member 80 shown in FIG. 10 is projection welded at a welding point W indicated by a black circle. The same applies to the other output engagement pieces 54 to 57, and the annular portion 81 of the spring member 80 is fixed to the output member 5 at five locations. The same applies to the spring member 90 and is fixed to the other surfaces of the output engagement pieces 53 to 57 by welding. The same applies to the fourth embodiment, but if the welding strength of the welded portions of the spring members 80 and 90 is large, the spring members 80 and 90 may be welded to the input member 3 or the output member 5 at two or three locations. . Although not shown, the output engagement pieces 53 to 57 are provided with spring locking portions as shown in Embodiments 1 to 3, and the shape of the annular portion 81 of the spring members 80 and 90 is changed to change the spring engagement portions. By providing a locking portion that can engage with the locking portion, the locking portion of the spring member may be locked to the spring locking portion provided on the output engagement piece. In the reverse input shut-off clutch 500 of the fifth embodiment, the spring member is fixed or locked to the output member 5, but when the rotational force is applied to the input member, the rotational force is transmitted to the output member. There is no influence at all, and the operation is the same as in the first to fourth embodiments. Even when an external force is applied to the output member, as described with reference to FIG. 15, the displacement of the output engagement piece is very small, so even if the spring member moves together with the output engagement piece. The roller member is also very small, and the roller member tends to move behind the minute movement of the output engagement piece due to inertia. Therefore, the roller member moves between the distal end surface of the output engagement piece 53 to 57 and the cylindrical portion 14 of the housing member 11. There is no adverse effect on the lock function that digs into the inner wall surface. Therefore, even if the spring members 80 and 90 are fixed to the output engagement pieces 53 to 57, a reverse input cutoff clutch having the same characteristics as those of the first to fourth embodiments can be obtained. In the fourth and fifth embodiments, the spring member is fixed by welding, but other bonding methods such as ultrasonic bonding, pressure welding, and brazing that are generally performed may be used.

[Embodiment 6]
Next, although not shown, a reverse input cutoff clutch in which at least the input engagement portion 32 shown in FIG. 3 is made of a synthetic rubber material or a synthetic resin material will be described. When the input engaging portion 32 is made of a synthetic rubber material or synthetic resin, the input engaging portion 32 is generally formed by pouring a synthetic rubber material or synthetic resin into a mold (not shown). At this time, spring portions that protrude from each other from the side C where the adjacent input engagement pieces 34 to 38 shown in FIG. 3 face each other may be formed together during molding. Various shapes of the spring portion are conceivable. For example, as in the above-described embodiment, a spring structure that applies an elastic force so as to sandwich both end sides of each roller member, or an elastic member that sandwiches the central portion of each roller member. A spring structure for applying a force, a spring structure for applying an elastic force so as to sandwich the both end sides of the roller member at many places, and the like are conceivable. In the sixth embodiment, an elastic force is applied to the roller member by the spring portion protruding from the side C where the input engagement pieces 34 to 38 face each other, and the roller member is held at substantially the center of the front end surface of the output engagement pieces 53 to 57. Therefore, the roller member may be equal to or shorter than the width of the input engagement pieces 34 to 38 and the output engagement pieces 53 to 57. Each roller member can be replaced with a ball.

  As is clear from the description of the above embodiments, for example, according to FIGS. 7, 14, and 15, the input engagement pieces 34 to 38 in the reverse input cutoff clutch are output when an external force is applied to the input member 3. Since it rotates while pushing the engagement pieces 53 to 57 and the roller members 71 to 75, although depending on the load torque, a large force is generally not applied, so the input engagement pieces 34 to 38 have elasticity. It is possible to provide a reverse input cutoff clutch having a required life even if it is made of a fat material. Compared with the input engagement pieces 34 to 38, a large force may be applied to the front end surfaces of the output engagement pieces 53 to 57, the roller members 71 to 75, and the cylindrical portion 14 of the housing member 11. You may comprise with a metal material. When a large force is not applied, all members or many members can be made of a synthetic rubber material or a synthetic resin. Further, a shaft fixed to a driving device such as a motor (not shown) is used as the input shaft portion 31 of the input member 3 shown in FIG. It may be attached. The same applies to the output member 5 shown in FIG. 4, in which a shaft of a load device (not shown) is used as the output shaft portion 51 and the shaft is attached to the output engagement portion 52 when the reverse input cutoff clutch is assembled. Also good. According to such a structure, the input shaft portion 31 and the input engagement pieces 34 to 38 and the output shaft portion 51 and the output engagement pieces 53 to 57 may be made of different materials.

  In the first to sixth embodiments described above, the input engagement piece of the input member 3 and the output engagement piece of the output member 5 have been described as five, but the number of output engagement pieces may be one, In this case, the input member 3 has two input engagement pieces that form one space that fits into one output engagement piece, and the cylindrical inner wall surface 13 of the housing and the input member 3 The space to be formed may be provided with one output engagement piece, one roller member, and two spring members having a pair of spring pieces for applying an elastic force in both directions to the roller member or the spring portion. . That is, when a rotational driving force is applied from the output member to the input member, one roller member may bite into one output engagement piece and the cylindrical inner wall surface 13 of the housing. Further, two to four output engagement pieces, or six or more output engagement pieces may be arranged at equal intervals. And the spring piece or spring part of a spring member should just be increased according to the number of roller members. Further, the annular portion of the spring member is not limited to a regular pentagonal shape, but may be an annular shape or other regular polygonal shape. Furthermore, a lubricant such as grease is applied between the central recess 39 of the input member 3 shown in FIG. 3 and the central protrusion 58 of the output member 5 shown in FIG. 4, or a bearing or oil-impregnated metal is used. It is further preferable to provide a simple rotation assisting member to reduce the frictional resistance between them. There are several methods for assembling the reverse input cutoff clutch. As shown in FIG. 20, before assembling the input member, the output member, the roller member, the spring member, etc. before assembling in the housing, it is assembled in the housing. Is easy and preferable. Therefore, it is preferable that the tip of the spring piece of the spring member bends in a direction facing each other so that the roller member does not easily fall off in the radial direction. In the first to third embodiments, the spring locking portions 34a to 38a and 34b to 38b provided on the input engagement pieces 34 to 38 are short pin-shaped, and each locking portion provided on the spring members 80 and 90 is provided. 86 may be a small hole that receives and locks the short pin-shaped spring locking portion.

It is drawing which shows the external appearance of the reverse input interruption | blocking clutch 100 concerning Embodiment 1 of invention. 2 is a view showing a housing member of the reverse input cutoff clutch 100. 3 is a diagram illustrating an input member of the reverse input cutoff clutch 100. 3 is a view showing an output member of the reverse input cutoff clutch 100. FIG. 4 is a view showing a state during assembly in order to explain the reverse input cutoff clutch 100. 4 is a view showing a state during assembly in order to explain the reverse input cutoff clutch 100. It is drawing which looked at the reverse input interruption | blocking clutch 100 from the front. 3 is a side view of a part of the reverse input cutoff clutch 100 as viewed from the side. 4 is a view for explaining a spring member used in the reverse input cutoff clutch 100. FIG. 2 is a view showing a metal spring body of a spring member used in the reverse input cutoff clutch 100. FIG. 3 is a view showing a resin-made annular locking auxiliary member of a spring member used in the reverse input cutoff clutch 100. FIG. 3 is a view showing a spring member used in the reverse input cutoff clutch 100. FIG. It is the figure which expanded the part which looked at the reverse input interruption | blocking clutch 100 from the front. 4 is a view for explaining the operation of the reverse input cutoff clutch 100. 4 is a view for explaining the operation of the reverse input cutoff clutch 100. It is drawing which looked at a part of reverse input interception clutch 200 concerning Embodiment 2 from the front. 3 is a view showing a spring member used in the reverse input cutoff clutch 200. 2 is a front view of a reverse input cutoff clutch 200. FIG. 3 is a side view of a part of the reverse input cut-off clutch 200. FIG. 2 is a view showing an assembly structure in the middle of a reverse input cutoff clutch 200. It is a front view of the 1st reverse input interception clutch 300 (1) concerning Embodiment 3. It is a front view of the 2nd reverse input interception clutch 300 (2) concerning Embodiment 3. It is a figure which shows a part of front view of the reverse input interruption | blocking clutch 400 which concerns on Embodiment 4. FIG. It is a figure which shows a part of front view of the reverse input interruption | blocking clutch 500 which concerns on Embodiment 5. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Housing 3 ... Input member 5 ... Output member 11 ... Housing member 12 ... Cover part 13 ... Cylindrical inner wall surface 14 ... Cylindrical part of the housing member 15 .. Side wall portion 16 of housing member 11... Through hole of side wall portion 17... Derived portion of side wall portion 15 31... Input shaft portion 32. ˜38... Input side engagement piece 34a to 38a... Spring engagement portion on one end side of input side engagement piece 34b to 38b. ... Output shaft part 52 ... Output engagement part 53-57 ... Output engagement piece 53A-57A ... End face (support surface) of the output engagement piece
58... Central projection of output member 5 71 to 75... Roller member 80, 90... First and second spring members 80A... Metal spring body of spring member 80 80B. 80 Auxiliary member for locking 81 ... Annular portion of metal spring body 80A 82 ... Metal piece of metal spring body 80A 82B, 82C ... Spring piece of spring member 80 85 ... For locking The annular portion 86 of the auxiliary member 80B ... the locking portion 80 ', 90' ... the first and second spring members 81 '... the spring members 80', 90 'of the locking auxiliary member 80B Annular portion 82 ', 83' ... Spring piece 81'A of spring member 80 ', 90' ... A side portion of annular portion 81 '81'B ... An angular portion of annular portion 81' A ... The arcuate outer wall surface of the input side engagement piece B ... The arcuate inner wall surface of the input side engagement piece C ... The side surface of the input side engagement piece P1 ... The first bar Front end portion of the mesh body P2... Front end portion of the second spring body 90 X ′... Right end surface of the input side engagement piece Y. Left end face of side engagement piece

Claims (12)

A housing member, an input member and an output member that are intertwined at a certain interval, a roller member provided between an inner wall surface of the housing member and a support surface of the output member, and the roller member A first spring member and a second spring member for applying an elastic force are provided. A rotational driving force from the input member is transmitted to the output member, and an external force applied to the output member is not transmitted to the input member. An input cutoff clutch,
The roller member has protrusions protruding from both end surfaces of the support surface of the output member and both end surfaces of the input member;
Each of the first spring member and the second spring member has an annular portion and a plurality of spring pieces extending from the annular portion,
The first spring member is attached to one end side of the input member or the output member and gives an elastic force to one of the protrusions of the roller member,
The second spring member is attached to the other end side of the input member or the output member and gives an elastic force to the protruding portion on the other side of the roller member,
The reverse input blocking clutch, wherein the output member, the roller member, and the spring member rotate together when the input member rotates. In claim 1,
Each of the first spring member and the second spring member has a locking portion,
The input member or the output member includes a spring locking portion at both ends for locking the locking portion of the first spring member and the second spring portion,
The reverse input blocking clutch, wherein the spring member is attached to both ends of the input member or the output member by locking the locking portion to the spring locking portion. In claim 1 or claim 2,
The input member has an input shaft portion and an input engagement portion located at one end of the input shaft portion,
The input engagement portion has a plurality of input engagement pieces extending at regular intervals in the radial inward direction,
The output member has an output shaft portion and an output engagement portion located on one end side of the output shaft portion,
The output engagement portion has one or more output engagement pieces extending in a radially outward direction,
The front end surface of the output engagement piece is the support surface,
The support surface of the output engagement piece is narrower than the length of the roller member,
The housing member has a cylindrical inner wall;
The roller member is located between the bearing surface of the output engagement piece and the cylindrical inner wall surface of the housing member;
The input engagement portion or the output engagement portion has the spring locking portions at both ends,
When the input member rotates, the input engagement piece and the output engagement piece mechanically engage with each other, whereby the output member also rotates together.
When a rotational force is applied to the output member, the roller member bites between the distal end surface of the output engagement piece and the cylindrical inner wall surface of the housing member, so that the rotational force of the output member becomes the input member. The reverse input shut-off clutch is characterized by not being transmitted to. In claim 3,
The spring engaging portions are provided at both ends of the input engaging piece of the input engaging portion or at both ends of the output engaging piece of the output engaging portion, and the spring member is the input member. Or the reverse input interruption | blocking clutch currently latched by the both ends of the said output member. In any one of Claim 1 thru | or 4,
The spring member comprises the annular portion and a spring piece that are integrally formed of a synthetic rubber material or a synthetic resin material,
The reverse input cutoff clutch, wherein the adjacent spring pieces sandwich the protruding portion of the roller member from both sides. In any one of Claim 1 thru | or 4,
The spring member comprises a metal spring body composed of the annular portion and a spring piece, and an auxiliary member for locking composed of a synthetic rubber material or a synthetic resin.
The metal spring body and the locking auxiliary member lock each other,
The reverse input shut-off clutch, wherein the locking auxiliary member is formed with the locking portion. In any one of Claim 1 thru | or 4,
The reverse input blocking clutch, wherein the spring member includes the annular portion made of a metal material and a spring piece, and is locked or fixed to the input member or the output member. In any one of Claims 1 thru | or 7,
The reverse input blocking clutch according to claim 1, wherein the spring member includes a pair of spring pieces extending from the annular portion or a plurality of sets at equal intervals. In any one of Claims 1 thru | or 7,
The reverse input shut-off clutch, wherein the roller member receives an elastic force from both sides or one side by the spring piece of the spring member. A housing member; an input member and an output member that are intricately spaced apart from each other; and a roller member provided between an inner wall surface of the housing member and a support surface of the output member. A rotational driving force from a member is transmitted to the output member, and an external force applied to the output member is a reverse input cutoff clutch that is not transmitted to the input member;
The input member includes an input shaft portion and an input engagement portion,
The input engagement portion is formed of a synthetic rubber material or a synthetic resin material, and includes a plurality of input engagement pieces extending at a constant interval in the radial inward direction and a spring portion formed integrally with the input engagement pieces. Have
The output member includes an output shaft portion and an output engagement portion,
The output engagement portion has one or more output engagement pieces extending in a radially outward direction,
The front end surface of the output engagement piece is a support surface for supporting the roller member,
The housing member has a cylindrical inner wall;
The roller member is located between the support surface of the output engagement piece and the cylindrical inner wall surface of the housing member, and receives an elastic force by the spring portion,
When the input member rotates, the output engagement member rotates together by mechanically engaging the input engagement piece with the output engagement piece,
When an external force is applied to the output member, the roller member bites between the distal end surface of the output engagement piece and the cylindrical inner wall surface of the housing member, so that the external force applied to the output member is applied to the input member. A reverse input cut-off clutch characterized by being not transmitted. In any one of Claims 1 thru | or 10,
A central protrusion or a central recess is formed at the center of the distal end surface of the output engagement portion,
A reverse input shut-off clutch, wherein a central recess for receiving the central protrusion or a central protrusion for receiving the central protrusion is formed at the center of the bottom surface of the input engagement portion. In any one of Claims 1 thru | or 10,
Two or more input engaging portions of the input member are formed,
One or more output engagement parts of the output member are formed, The reverse input interception clutch characterized by things.

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