JP2010088682A - Angle adjustment metal fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an angle adjustment metal fitting which can surely prevent the other metal fitting from rotating oppositely to one metal fitting and permits the size to be reduced further. <P>SOLUTION: The angle adjustment metal fitting 10 has a first tool 1 having a receiving member 3, a second tool 9, and a wedge member 7. The receiving member 3 is made of a bent metal plate of a U-shaped cross-section having a receiving plate portion 3a arranged counter to the gear portion 9c of the second tool 9 and a pair of both side plate portions 3b and 3b formed by bending from both side edges of the width direction. The wedge member 7 is arranged in a wedge-like clearance 5 between both side plate portions 3b and 3b and between the receiving plate portion 3a and the gear portion 9c in a state of being permitted to move in the length direction of the wedge-like clearance 5 and in a state of being restrained from moving in the width direction by both side plate portions 3b and 3b. Furthermore, the wedge member 7 prevents the turn of the second metal fitting 9 in the reverse direction by being received by the engagement of the tooth portion 7b with the gear portion 9c and the butting of the rear 7c against the plate surface 3k of the plate portion 3a. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an angle adjustment fitting used for a reclining seat (eg, a seat chair) and the like, and a reclining seat using the angle adjustment fitting.

  For example, as an angle adjusting bracket for adjusting a tilt angle of a back frame in a reclining seat such as a seat chair or a vehicle seat, those described in, for example, Japanese Patent Laid-Open No. 9-19339 and Japanese Patent No. 3766669 are known. (See Patent Document 1 or 2).

  The angle adjusting bracket (joint bracket) of the former publication (Japanese Patent Laid-Open No. 9-19339) includes a first bracket, a second bracket pivotally attached to the first bracket, and a receiving cam member. A wedge-shaped gap gradually widening upward is formed between the convex curved surface formed on the second metal fitting and the concave curved surface formed on the receiving cam member. A roller is inserted in the roller so as to be freely rotatable, and the roller rolls and moves toward the narrower side of the wedge-shaped gap as the second metal fitting rotates in a predetermined direction, so that the roller has a convex curved surface and a concave curved surface. It is comprised so that the expansion | deployment direction rotation of a 2nd metal fitting may be blocked | prevented between them. This angle adjusting bracket has an advantage that the angle can be adjusted steplessly.

The angle adjustment fitting (angle adjustment fitting) of the latter publication (Japanese Patent No. 3766669) is pivotally attached to a first fitting (first arm) provided with a case portion and a case portion of the first arm. The second metal fitting (second arm) and the floating wedge member are provided, and the floating wedge member is movably disposed in the wedge-shaped window provided in the case portion of the first metal fitting. The tooth portion of the wedge member meshes with the gear portion of the second metal fitting, and the back surface of the wedge member abuts against the wedge surface of the wedge-shaped window portion, so that the wedge member moves between the gear portion and the wedge surface of the wedge-shaped window portion. It is comprised so that it may be pinched | interposed strongly between and the rotation of the expansion | deployment direction of a 2nd metal fitting may be prevented. According to this angle adjustment fitting, since the teeth of the gear portion can be reduced, the number of teeth of the gear portion can be increased, and therefore, there is an advantage that the number of angle adjustment steps can be increased.
Japanese Patent Laid-Open No. 9-19339 Japanese Patent No. 3766669

  However, in the angle adjusting bracket of the former publication, the rotation of the second bracket is prevented by the roller being sandwiched between the convex curved surface and the concave curved surface. A large load is applied to the. Therefore, it is necessary to set the wall thickness of the receiving cam member having a concave curved surface to withstand this load, and as a result, there is a drawback that the size of the angle adjusting fitting increases.

  Further, in the angle adjusting bracket of the latter publication, the case portion of the first fitting has a pair of wall portions arranged so as to be opposed to each other (particularly paragraphs [0011] and FIG. 2] and [FIG. 3]), and wedge-shaped window portions (see particularly paragraph [0015] of the same publication) are formed in both the wall portions, and the wedges are formed by the edge surfaces of both of these wedge-shaped window portions. A wedge member is disposed in both wedge-shaped window portions in a manner straddling the surface. Therefore, when the positions of both the wedge-shaped window portions are shifted, the wedge member is rattled in the both wedge-shaped window portions, and as a result, the wedge member cannot be smoothly moved in the both wedge-shaped window portions. In addition, there is a problem that the wedge member falls off from either one of the wedge-shaped window holes, and the rotation of the second metal fitting cannot be reliably prevented. In particular, both wall portions of the first metal fitting provided with both wedge-shaped window portions are preliminarily drilled with wedge-shaped window holes in the portions to be the both wall portions of the flat metal plate forming the first metal fitting, Since the metal plates are generally formed by bending so that the both wall portions are arranged to face each other, the mutual positions of the two wedge-shaped window portions are very easily displaced. For this reason, the above-described problem is likely to occur.

  Furthermore, since a very large load is applied to the wedge surface of each wedge-shaped window portion with which the back surface of the wedge member abuts when the second metal fitting is prevented from rotating, the width of each wedge surface is required to withstand this load. The wider one is desirable. However, since the width of each wedge surface corresponds to the thickness of each wall portion of the first metal fitting, the wall thickness of each wall portion of the first metal fitting is increased in order to increase the width of each wedge surface. As a result, there arises a problem that the size of the angle adjusting bracket increases.

  The present invention has been made in view of the above-described technical background, and an object of the present invention is to rotate the other metal fitting in a predetermined direction with respect to one metal fitting among two metal fittings that are rotatably connected to each other. An object of the present invention is to provide an angle adjustment fitting that can be reliably prevented and reduced in size and a reclining seat using the same.

  The present invention provides the following means.

[1] A first metal fitting provided with a receiving member;
A second metal fitting connected to the first metal fitting via a rotation shaft so as to be rotatable in both forward and reverse directions relative to the receiving member;
A wedge member,
The receiving member is a U-shaped metal plate having a receiving plate portion arranged to face the gear portion and a pair of opposed side plate portions bent from both side edges in the width direction. Consisting of
The wedge member is movable between the side plate portions of the receiving member and in the wedge-shaped gap between the receiving plate portion and the gear portion, and is movable in the length direction of the wedge-shaped gap and the both side plates. Is disposed in a state in which movement in the width direction is restricted by the portion, and a tooth portion formed on the abdominal surface facing the gear portion side meshes with the gear portion and a back surface facing the receiving plate portion side. An angle adjusting bracket that prevents the second bracket from rotating in the reverse direction by being received in contact with the plate surface of the receiving plate portion.

  [2] A holding recess for holding the wedge member in a state in which the tooth portion does not mesh with the gear portion is disposed substantially parallel to the side plate portion on the spreading side of the wedge-shaped gap between the side plate portions of the receiving member. 2. The angle adjusting bracket according to 1 above, which is formed at the edge of the holding plate.

[3] The holding plate is formed separately from the receiving member,
The engaging recess provided in the intermediate portion in the width direction of the receiving plate portion of the receiving member and the engaging recess provided in the holding plate are fitted to each other, whereby the holding plate receives the receiving member. 3. The angle adjusting bracket according to claim 2, wherein the angle adjusting bracket is engaged with the intermediate portion in the width direction of the plate portion so as not to move in the width direction of the receiving plate portion.

[4] The wedge member is biased toward the gear portion by a biasing spring,
The biasing spring is latched and held by a latching portion provided on the holding plate at an intermediate portion of the biasing spring in a state where both ends of the biasing spring straddle the holding plate,
The angle adjustment according to claim 2 or 3, wherein both ends of the biasing spring are pressed against both ends in the width direction of the back surface of the wedge member by a restoring force generated in the biasing spring. Hardware.

[5] In a state where the holding plate side portion of the holding plate is disposed between the holding plate side portions of the both side plate portions of the receiving member, these portions are connected to each other via a connecting shaft. Has been
The biasing spring is formed of a torsion coil spring having a coil portion divided into two at an intermediate portion of the biasing spring,
In a state where the two coil portions of the biasing spring straddle the holding plate, the two coil portions are extrapolated to the connecting shaft, and a connecting spring wire portion connecting the two coil portions is the engagement of the holding plate. It is locked and held at the stop,
5. The preceding item 4 in which the wedge member is biased by pressing both end portions of both coil portions of the biasing spring against both end portions in the width direction of the back surface of the wedge member by a torsional restoring force generated in each coil portion. Angle adjustment bracket.

[6] In a state where the holding plate side portion of the holding plate is disposed between the holding plate side portions of the both side plate portions of the receiving member, these portions are connected to each other via a connecting shaft. As
The portion according to any one of the preceding items 2 to 5, wherein a portion on the rotating shaft side in the both side plate portions of the receiving member and a portion on the rotating shaft side in the holding plate are pivotally supported by the rotating shaft. Angle adjustment bracket.

  [7] A first bead portion that is bent toward the gear portion side and extends in the length direction of the receiving plate portion is formed at a portion of the receiving plate portion of the receiving member that contacts the back surface of the wedge member. The angle adjusting bracket according to any one of the preceding items 1 to 6.

  [8] Any one of the preceding items 1 to 7, wherein a second bead portion extending in the width direction of the receiving plate portion is formed in a portion of the receiving plate portion of the receiving member that does not contact the back surface of the wedge member. Angle direct bracket described in Crab.

  [9] A reclining characterized in that a seat frame is connected to the first metal fitting of the angle adjusting metal fitting according to any one of the preceding items 1 to 8, and a back frame is connected to the second metal fitting of the angle adjusting metal fitting. Sheet.

  The present invention has the following effects.

  In the invention of [1], the receiving member of the first metal fitting is made of a bent product of a U-shaped metal plate having a receiving plate portion and both side plate portions, so that the receiving member can be easily manufactured. .

  Furthermore, the tooth portion of the abdomen surface of the wedge member meshes with the gear portion, and the back surface of the wedge member is received in contact with the plate surface of the receiving plate portion of the receiving member, thereby preventing reverse rotation of the second metal fitting. Therefore, when the second metal fitting is prevented from rotating in the reverse direction, a large load is applied from the wedge member to the receiving plate portion of the receiving member. However, the receiving plate portion is reinforced by bending a pair of opposing side plate portions from both side edges in the width direction. Therefore, even if the thickness of the receiving plate portion is not necessarily increased, the load can be firmly received by the plate portion. Thereby, size reduction of an angle adjustment metal fitting can be achieved, and the rotation of the 2nd metal fitting in the reverse direction can be prevented reliably.

  Moreover, the back surface of the wedge member is not received by the wedge surface formed by the edge surfaces of the two wedge-shaped window portions spaced apart from each other as in the conventional latter angle adjusting bracket, but the receiving plate of the receiving member. Since the back surface of the wedge member can be received stably, and the wedge member is restricted from moving in the width direction by the both side plate portions of the receiving member, the reverse of the second metal fitting. The problem of the wedge member falling off in the width direction from the wedge-shaped gap does not occur when the rotation of the direction is prevented, and therefore, the reverse rotation of the second metal fitting can be more reliably prevented.

  In the invention of [2], when the second metal fitting is allowed to rotate in the reverse direction, the tooth member of the wedge member is moved by moving the wedge member to the widening side of the wedge-shaped gap and disposing it in the holding recess. The wedge member is held in a state where it does not mesh with the gear portion. Thereby, the reverse rotation of the second metal fitting can be allowed. Further, in this state, since the tooth portion of the wedge member is not meshed with the gear portion, a large load is not applied to the holding plate. Accordingly, the wedge member can be held without necessarily increasing the thickness of the holding plate, that is, the thickness of the holding plate can be set as thin as possible, thereby further miniaturizing the angle adjusting bracket. be able to.

  In the invention of [3], since the holding plate is formed separately from the receiving member, the holding plate can be easily manufactured.

  Further, since the holding plate is engaged with the intermediate portion of the receiving member in the width direction of the receiving plate so as not to move in the width direction of the receiving plate, the holding plate is prevented from moving in the width direction of the receiving plate. Thus, the wedge member can be securely held.

  In the invention of [4], since the wedge member is urged toward the gear portion by the urging spring, the tooth portion of the wedge member can be reliably engaged with the gear portion.

  Furthermore, the urging spring securely holds the urging spring by the intermediate portion of the urging plate being held and held by the holding portion of the holding plate with both ends of the urging spring straddling the holding plate. Can be held.

  In addition, since the wedge member is urged by pressing both ends of the urging spring against both widthwise ends of the back surface of the wedge member, the wedge member is urged toward the gear portion with a good balance in the width direction. Accordingly, the tooth portion of the wedge member can be more reliably engaged with the gear portion.

  In the invention of [5], these portions are connected to each other via the connecting shaft in a state where the portions on the holding plate side of the holding plate are disposed between the portions on the holding plate side of the both side plate portions of the receiving member. Therefore, the holding plate can be reliably arranged between the both side plate portions of the receiving member, and the receiving member and the holding plate can be integrally connected via the connecting shaft, thereby adjusting the angle. The bracket can be easily assembled and manufactured.

  Further, the two coil portions of the urging spring straddle the holding plate, the both coil portions are extrapolated to the connecting shaft, and the connecting spring wire portion connecting the two coil portions to the engaging portion of the holding plate. By being locked and held, the urging spring can be held more reliably, and the configuration for holding the urging spring can be simplified.

  In addition, since the wedge member is urged by pressing both ends of both coil portions of the urging spring against both ends in the width direction of the back surface of the wedge member by the torsional restoring force generated in each coil portion, the wedge member Can be urged toward the gear portion with a good balance in the width direction, whereby the tooth portion of the wedge member can be more reliably engaged with the gear portion.

  In the invention of [6], these portions are connected to each other via the connecting shaft in a state where the holding plate side portion of the holding plate is disposed between the holding plate side portions of the both side plate portions of the receiving member. Therefore, the holding plate can be reliably arranged between the both side plate portions of the receiving member, and the holding plate and the receiving member can be integrally connected via the connecting shaft, thereby adjusting the angle. The bracket can be easily assembled and manufactured.

  Furthermore, since the part on the rotating shaft side in the both side plates of the receiving member and the part on the rotating shaft side in the holding plate are pivotally supported by the rotating shaft, the receiving member, the holding plate, and the second metal fitting are They can be integrally connected via the rotating shaft, so that the angle adjusting bracket can be assembled and manufactured more easily.

  In the invention of [7], since the first bead portion is formed on the receiving plate portion of the receiving member, the receiving plate portion can be reinforced by the first bead portion. Thereby, even if it does not necessarily increase the thickness of a receiving plate part, the load from a wedge member can be reliably received in a plate part.

  Further, the first bead portion is formed to bend toward the gear portion side and extend in the length direction of the receiving plate portion at the portion of the receiving plate portion of the receiving member that contacts the back surface of the wedge member. The gap between the gear portion and the gear portion, that is, the size of the wedge-shaped gap, is easily finely adjusted so that the tooth portion of the wedge member reliably meshes with the gear portion when the second metal fitting is prevented from rotating in the reverse direction. be able to.

  In the invention of [8], since the second bead portion is formed on the receiving plate portion of the receiving member, the receiving plate portion can be reinforced by the second bead portion. Thereby, even if it does not necessarily increase the thickness of a receiving plate part, the load from a wedge member can be reliably received in a plate part.

  Furthermore, since the second bead portion is formed at a portion that does not contact the back surface of the wedge member in the receiving plate portion, the movement of the wedge member in the wedge-shaped gap is prevented from being hindered by the second bead portion. be able to.

  In the invention of [9], the angle adjusting bracket of the reclining seat has the same effect as the above-described invention.

  Next, several embodiments of the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, the angle adjusting bracket 10 according to the present embodiment is used for a seat chair 20 as a reclining seat, for example. The seat 20 includes a seat frame 21 as one member and a back frame 22 as the other member. The seat frame 21 and the back frame 22 are each made of a metal round pipe bent in a substantially U shape. The rear end portions of the left and right side frame portions 21a and 21a of the seat frame 21 and the lower end portions of the left and right side frame portions 22a and 22a of the back frame 22 are respectively connected via the pair of left and right angle adjusting brackets 10 and 10 of this embodiment. By being connected to each other, the back frame 22 can be tilted with respect to the seat frame 21 within an angle range from a deployed state to a standing state.

  As shown in FIG. 5A, the angle adjustment fitting 10 of the present embodiment includes a first fitting 1, a second fitting 9, a wedge member 7, a biasing spring 8, and the like.

  The first metal fitting 1 is attached to the seat frame 21, and includes a first metal fitting main body 2, a receiving member 3 that receives the wedge member 7, and a holding plate 4. The first metal fitting body 2, the receiving member 3 and the holding plate 4 are formed separately from each other, and the receiving member 3 and the holding plate 4 are connected to the first metal fitting main body 2 in a fixed state. Therefore, the first metal fitting 1 includes the receiving member 3 and the holding plate 4 in a fixed state.

  As shown in FIGS. 5A and 5B, the first metal fitting main body 2 is formed of a bent metal plate product formed by bending a single metal plate such as a steel plate into a predetermined shape. A cylindrical seat frame mounting portion 2a fixedly attached to the rear end of each of the left and right side frame portions 21a, and a pair of opposed plate-like outer parts integrally formed on the rear end of the seat frame mounting portion 2a It has wall portions 2b and 2b and a plate-like bottom wall portion 2c in which lower end portions on the front side of the outer side wall portions 2b and 2b are connected to each other. It is open.

  The receiving member 3 is composed of a bent molded product formed by bending a single metal plate such as a steel plate into a U-shaped cross section, and includes a receiving plate portion 3a and both side edges in the width direction of the receiving plate portion 3a. And a pair of opposite side plate portions 3b and 3b which are bent from the side. Both side plate portions 3b and 3b are spaced apart from each other and arranged in parallel. The receiving member 3 is disposed between the outer side wall portions 2b, 2b of the first metal fitting main body portion 2, and in this state, the first metal fitting main body portion 2 is connected to a later-described connecting shaft 2f and a rotating shaft 9j. They are connected together.

  The configuration of the holding plate 4 will be described later.

  The second metal fitting 9 is attached to the back frame 22, and is relatively to the first metal fitting 1 (the first metal fitting main body 2) and the receiving member 3 via the rotation shaft 9 j. It is connected so that it can rotate in both forward and reverse directions. The second metal fitting 9 is made of a bent product of a metal plate formed by bending a single metal plate such as a steel plate into a predetermined shape, and is a lower end of each of the left and right side frame portions 22a of the back frame 22. A cylindrical back frame attachment portion 9a attached in a fixed state, and a pair of opposed plate-like ratchet main body portions 9b, 9b integrally formed at the lower end of the back frame attachment portion 9a. Both ratchet main body portions 9b and 9b have the same shape and the same size as each other, and are slightly spaced from each other.

  2, 3, 6 </ b> A, 6 </ b> B, both ratchet main body portions 9 b, 9 b of the second metal fitting 9 are arranged between both outer wall portions 2 b, 2 b of the first metal fitting main body portion 2 of the first metal fitting 1. In this state, the rotation shaft hole 2e provided in the both outer side wall portions 2b and 2b of the first metal fitting body 2 and the central portions of the ratchet main body portions 9b and 9b of the second metal fitting 9, respectively. A rotation shaft 9j made of a rivet is inserted into the provided rotation shaft hole 9i so as to communicate with the rotation shaft holes 2e and 9i, whereby the second metal fitting 9 is connected to the rotation shaft 9j. It is pivotally supported so that it can rotate in both forward and reverse directions S and G relative to the first metal fitting 1 (more specifically, the first metal fitting main body 2 and the receiving member 3) around the rotation shaft 9j. The shaft is connected to the first metal fitting 1 (specifically, the first metal fitting main body 2 and the receiving member 3) via the shaft 9j.

  Here, in this embodiment, for convenience of explanation, as shown in FIG. 4, the second direction relative to the first metal fitting 1 in the forward / reverse rotation direction of the second metal fitting 9 with respect to the first metal fitting 1 (first metal fitting main body portion 2). The rotation direction in which the opening angle of the metal fitting 9 is reduced, that is, the folding direction of the second metal fitting 9 with respect to the first metal fitting 1 is referred to as “positive rotation direction S (or simply“ positive direction S ”)”. The rotation direction in which the opening angle of the second metal fitting 9 is increased, that is, the development direction of the second metal fitting 9 with respect to the first metal fitting 1 is referred to as “reverse rotation direction G (or simply“ reverse direction G ”)”.

  Further, as shown in FIG. 5A, the peripheral edge portions of the ratchet main body portions 9b, 9b of the second metal fitting 9 are formed in an arc shape centering on the rotation shaft 9j (that is, the rotation shaft hole 9i). In addition, a gear portion 9c is formed on the arc-shaped peripheral edge portion. The gear portion 9c is composed of a plurality of gear tooth portions 9d arranged at a predetermined pitch in the circumferential direction on the arc-shaped peripheral edge portion. The number of the gear tooth portions 9d is, for example, in the range of 5 to 25 (for example, 15 to 20 in detail). However, in the present invention, the number of gear teeth 9d is not limited to being in the above range.

  Moreover, as shown in FIGS. 3, 6 </ b> A, and 6 </ b> B, the receiving member 3 is disposed between the outer side wall portions 2 b and 2 b of the first metal fitting main body portion 2. Further, the receiving plate portion 3a of the receiving member 3 is arranged to be opposed to and slightly spaced from the gear portion 9c of the second metal fitting 9 as shown in FIGS. 4 and 7A. A wedge-shaped gap 5 is formed between the portion 3a and the gear portion 9c. The wedge-shaped gap 5 is narrowed on the upper side and widened on the lower side. The receiving plate portion 3a is formed so that the length direction along the receiving plate portion 3a is not bent in an arc shape but is straight, and is further arranged so as not to intersect with the gear portion 9c. Yes. Moreover, the both side plate portions 3b and 3b of the receiving member 3 are disposed on both outer sides of the gear portions 9c and 9c of the ratchet main body portions 9b and 9b of the second metal fitting 9 as shown in FIGS. 6A and 6B. Then, the gear portions 9c and 9c of the two ratchet main body portions 9b and 9b of the second metal fitting 9 are disposed between the side plate portions 3b and 3b of the receiving member 3.

  As shown in FIGS. 4 and 7A, the wedge member 7 is movable between the side plate portions 3b and 3b of the receiving member 3 and in the wedge-shaped gap 5 in the longitudinal direction of the wedge-shaped gap 5 (that is, wedge-shaped). The gap 5 can be moved between the narrow side and the wide side) and the movement in the width direction is restricted by the side plates 3b and 3b.

  The wedge member 7 is made of metal such as steel, and as shown in FIG. 5C, a surface 7a facing the gear portion 9c side of the wedge member 7 (this surface is referred to as “abdominal surface 7a”) is a gear in the second metal fitting 9. The ratchet main body portions 9b and 9b are formed with arcuate surfaces corresponding to the arc-shaped peripheral edge portions of the ratchet main body portions 9b and 9b, and a gear portion 9c (specifically, a gear tooth portion 9d of the gear portion 9c) is formed on the abdominal surface 7a. One or a plurality of tooth portions 7b to be engaged with each other are formed. The number of teeth 7b is less than the number of gear teeth 9d, for example 1-8. In the present embodiment, the number of teeth 7b is 2-6. However, in the present invention, the number of teeth 7b is not limited to being within the above range.

  A surface 7c of the wedge member 7 facing the receiving plate portion 3a (this surface is referred to as a “rear surface 7c”) is formed in a substantially arc surface, and extends along the width direction of the plate surface 3k of the receiving plate portion 3a. It is the surface that comes into contact.

  The width dimension of the wedge member 7 is set in accordance with the gap dimension between the side plate portions 3b and 3b of the receiving member 3, that is, for example, is set to be equal to or slightly smaller than the gap dimension. .

  As shown in FIGS. 4 and 7A, the wedge member 7 is moved to the narrowing side of the wedge-shaped gap 5, the tooth portion 7b meshes with the gear portion 9c, and the back surface 7c thereof is the receiving plate portion 3a. The second metal fitting 9 is prevented from rotating in the reverse direction G by being received in contact with the plate surface 3k. On the other hand, when the wedge member 7 is moved to the spreading side of the wedge-shaped gap 5, the tooth portion 7b does not mesh with the gear portion 9c, and the second metal fitting 9 is allowed to rotate in the reverse direction G (FIG. 8D).

  As shown in FIG. 5A, the holding plate 4 is separate from the receiving member 3 and is formed of a single metal plate or the like, and is moved to the spreading side (that is, the lower side) of the wedge-shaped gap 5. It has the holding | maintenance recessed part 4e which hold | maintains the wedge member 7 in the state which the tooth | gear part 7b does not mesh with the gear part 9c (refer FIG. 8D).

  The holding plate 4 is disposed in parallel with the side plate portions 3 b and 3 b on the side where the wedge-shaped gap 5 extends between the side plate portions 3 b and 3 b of the receiving member 3. A holding recess 4e is cut out at the edge of the holding plate 4 facing the wedge-shaped gap 5 (more specifically, the upper edge), with the opening facing the wedge-shaped gap 5. Further, as shown in FIG. 4, the holding plate 4 is disposed in an upright manner in contact with the bottom wall portion 2 c of the first metal fitting body 2.

  As shown in FIG. 5A, an engaging recess 4 f that opens substantially upward is cut out at an end edge portion (more specifically, an upper end edge portion) of the holding plate 4 on the receiving plate portion 3 a side. On the other hand, an engaging recess 3g that opens substantially downward is cut out at the intermediate portion in the width direction of the end edge portion (more specifically, the lower end edge portion) on the holding plate 4 side of the receiving plate portion 3a of the receiving member 3. Yes. As shown in FIGS. 6A and 6B, the engaging recess 4f of the holding plate 4 and the engaging recess 3g of the receiving plate portion 3a are fitted to each other, so that the holding plate 4 has a lower end edge of the receiving plate portion 3a. Is engaged with the intermediate portion in the width direction of the portion so as not to move in the width direction of the receiving plate portion 3a.

  6A and 6B, the end 4a on the receiving plate 3a side of the holding plate 4 is the end 3c, 3c (that is, the lower end) on the holding plate 4 side on both side plates 3b and 3b of the receiving member 3. The receiving member 3 is disposed between the outer side wall portions 2b and 2b of the first metal fitting main body portion 2. In this state, the connecting shaft holes 4b, 3d, and 3d provided in the end portions 4a, 3c, and 3c and the connecting shaft holes provided in the outer side wall portions 2b and 2b of the first metal fitting body 2 respectively. A connecting shaft 2f made of rivets is inserted into 2d and 2d in a state where these connecting shaft holes 4b, 3d, 3d, 2d and 2d are communicated. Thereby, the end 4a on the receiving plate 3a side of the holding plate 4 and the ends 3c, 3c on the holding plate 4 side on both side plates 3b, 3b of the receiving member 3 are connected to each other via the connecting shaft 2f. In addition, these end portions 4a, 3c, and 3c are connected to both outer wall portions 2b and 2b of the first metal fitting main body portion 2 via a connecting shaft 2f.

  Further, the end portions 3e and 3e on the side of the rotating shaft 9j of the both side plate portions 3b and 3b of the receiving member 3 are disposed on both outer sides of the ratchet main body portions 9b and 9b of the second metal fitting 9 and the holding plate 4 The end portion 4c on the rotating shaft 9j side is disposed between the ratchet main body portions 9b and 9b (see FIGS. 3 and 4). In this state, as shown in FIGS. 6A and 6B, the rotary shaft 9j is inserted into the rotary shaft holes 4d, 3f, and 3f provided in the end portions 4c, 3e, and 3e, respectively. By inserting the holes 4d, 3f, and 3f in a state of communicating with each other (see FIG. 4), the end portions 3e and 3e of the receiving plate 3 on the side of the rotation shaft 9j and the rotation of the holding plate 4 are rotated. An end 4c on the side of the moving shaft 9j is pivotally supported by the rotating shaft 9j.

  Therefore, the receiving member 3 and the holding plate 4 are connected to the first metal fitting body 2 in a fixed state via the connecting shaft 2f and the rotating shaft 9j. On the other hand, the second metal fitting 9 is pivotally supported by a rotation shaft 9j so as to be rotatable relative to the first metal fitting main body 2, the receiving member 3, and the holding plate 4.

  The urging spring 8 constantly urges the wedge member 7 disposed in the wedge-shaped gap 5 toward the gear portion 9c. As shown in FIG. 5A, the urging spring 8 is formed of a torsion coil spring having coil portions 8a and 8a that are divided into two at an intermediate portion of the urging spring 8. The two coil portions 8a and 8a are integrally connected to each other via a connecting spring wire portion 8b as an intermediate portion formed between them.

  6A and 6B, the coil portions 8a and 8a of the urging spring 8 are arranged in a state of straddling the end portion 4a on the receiving plate portion 3a side of the holding plate 4, and the urging spring. 8 is inserted into a locking groove 4g as a locking portion formed at the bottom of the engaging recess 4f of the holding plate 4 and is held by locking. In this state, both coil portions 8a, 8a of the urging spring 8 are extrapolated and held by the connecting shaft 2f. Further, as shown in FIG. 7A, the linear ends 8c, 8c of the coil portions 8a, 8a of the urging spring 8 are twisted restoring force generated in each coil portion 8a (specifically, torsion elastic restoring force). Therefore, the wedge member 7 is uniformly pressed against both end portions in the width direction of the back surface 7c of the wedge member 7, and the wedge member 7 is constantly urged toward the gear portion 9c.

  Here, since the locking groove 4g is formed at the bottom of the engaging recess 4f of the holding plate 4, the connecting spring wire portion 8b of the urging spring 8 locked to the locking groove 4g is the holding plate. The engagement recess 3g of the receiving plate 3a fitted in the 4 engagement recess 4f can be prevented from being accidentally pulled out from the locking groove 4g.

  Further, as shown in FIGS. 5B and 7A, the portion of the receiving plate portion 3a of the receiving member 3 that contacts the back surface 7c of the wedge member 7 is bent toward the gear portion 9c and covers the entire width region of the receiving plate portion 3a. Thus, a first bead portion 3h extending in the length direction of the receiving plate portion 3a is formed. The first bead portion 3h reinforces the receiving plate portion 3a and finely adjusts the size of the gap between the receiving plate portion 3a and the gear portion 9c, that is, the size of the wedge-shaped gap 5.

  Further, a second bead that bends toward the gear portion 9c and extends in the width direction of the receiving plate portion 3a at the upper end side portion of the receiving plate portion 3a of the receiving member 3 that does not contact the back surface 7c of the wedge member 7. Part 3i is formed. The receiving plate portion 3a is further reinforced by the second bead portion 3i.

  Further, as shown in FIGS. 8A to 8D, the wedge member 7 moved to the narrow side of the wedge-shaped gap 5 is spread at the end of the gear portion 9 c of the second metal fitting 9 in the forward rotation direction S. A pressing protrusion 9f that presses toward the side and presses into the holding recess 4e of the holding plate 4 protrudes outward from the gear portion 9c and is integrally formed.

  On the other hand, as shown in FIGS. 9A and 9B, a wedge member 7 disposed in the holding recess 4e of the holding plate 4 is provided at the end of the gear portion 9c of the second metal fitting 9c in the reverse rotation direction G. An extrusion protrusion 9e that is pushed out from the inside to the wedge-shaped gap 5 protrudes outward from the gear portion 9c and is integrally formed.

  Further, as shown in FIGS. 7A and 7B, a wedge member 7 in which a tooth portion 7b meshes with a gear portion 9c at an opening side end portion of a side edge portion of the holding recess 4e of the holding plate 4 on the rotating shaft 9j side. The guide step portion 4h that guides the second metal fitting 9 toward the receiving plate portion 3a against the urging force of the urging spring 8 by the forward rotation operation of the second metal fitting 9 protrudes outward from the position of the gear portion 9c and descends downwardly. It is formed in an inclined state. When the second metal fitting 9 is rotated forward, the wedge member 7 having the tooth portion 7b meshed with the gear portion 9c is guided and moved to the receiving plate portion 3a side by the pushing step portion 4h. The meshing between the portion 7b and the gear portion 9c is released.

  Next, operation | movement of the angle adjustment metal fitting 10 of this embodiment is demonstrated below.

  7A to 7C are diagrams illustrating an operation of rotating the second metal fitting 9 of the angle adjusting metal fitting 10 of the present embodiment in the positive direction S. FIG.

  In the angle adjustment fitting 10 shown in FIG. 7A, the tooth portion 7b of the wedge member 7 is engaged with the gear portion 9c of the second fitting 9 (specifically, the gear tooth portion 9d of the gear portion 9c) by the urging force of the urging spring 8. At the same time, when the wedge member 7 is moved to the narrower side of the wedge-shaped gap 5 in this meshing state, the back surface 7c of the wedge member 7 is received in contact with the plate surface 3k of the receiving plate portion 3a of the receiving member 3. Thus, the second metal fitting 9 is prevented from rotating in the reverse direction G relative to the first metal fitting 1 (more specifically, the first metal fitting main body 2, the receiving member 3, and the holding plate 4). . In this state, the second metal fitting 9 is arranged at a maximum opening angle of about 180 ° with respect to the first metal fitting 1, that is, the second metal fitting 9 is arranged in an unfolded state with respect to the first metal fitting 1.

  Furthermore, in this state, the stopper portion 9g provided at the lower end edge of the rear wall portion of the second metal fitting 9 is connected to the first metal fitting 1 (specifically, the rear edge portion of the holding plate 4 of the first metal fitting 1). This makes contact with the provided stopper portion 4i, so that even if an overload in the reverse rotation direction G is applied to the second metal fitting 9, it is possible to rotate the second metal fitting 9 in the reverse direction G. The movement is further prevented by the stopper portion 9g of the second metal fitting 9 abutting against the stopper portion 4i of the first metal fitting 1.

  When the second metal fitting 9 is rotated in the positive direction S from the state shown in FIG. 7A, the wedge member 7 expands the wedge-shaped gap 5 in accordance with the normal rotation operation of the second metal fitting 9 as shown in FIG. 7B. The wedge member 7 is guided toward the receiving plate portion 3a against the urging force of the urging spring 8 when the wedge member 7 abuts against the guide step portion 4h. As a result, the wedge member 7 is disengaged from the gear portion 9b.

  Further, by rotating the second metal fitting 9 in the positive direction G, the tooth portion 7b of the wedge member 7 is moved to the gear tooth portion 9d of the next stage of the gear portion 9 by the urging force of the urging spring 8 as shown in FIG. Make a clicking sound. When the second metal fitting 9 rotates in the reverse direction G under this meshing state, the wedge member 7 is slightly moved to the narrow side of the wedge-shaped gap 5 along with the reverse rotation operation, and the back surface of the wedge member 7 is moved. 7 c is received in contact with the plate surface 3 k of the receiving plate portion 3 a of the receiving member 3. Thereby, rotation of the 2nd metal fitting 9 in the reverse direction G is blocked | prevented.

  As the second metal fitting 9 is thus rotated in the positive direction S, the tooth portions 7b of the wedge member 7 are successively engaged with the gear tooth portions 9d of the gear portion 9c.

  8A to 8D are diagrams illustrating an operation of rotating the second metal fitting 9 of the angle adjusting metal fitting 10 of the present embodiment in the reverse direction G. FIG.

  In the angle adjustment fitting 10 shown in FIG. 8A, the second fitting 9 is rotated to the maximum in the positive direction S with respect to the first fitting 1, and the opening angle of the second fitting 9 with respect to the first fitting 1 is about 95. °. In this state, the tooth portion 7b of the wedge member 7 is engaged with the gear portion 9c of the second metal fitting 9 by the urging force of the urging spring 8, and the wedge member 7 is moved to the narrow side of the wedge-shaped gap 5 in this engagement state. Thus, the back surface 7c of the wedge member 7 is received in contact with the plate surface 3k of the receiving plate portion 3a of the receiving member 3, whereby the second metal fitting 9 is prevented from rotating in the reverse direction G. Yes.

  When the second metal fitting 9 is rotated in the positive direction S from the state shown in FIG. 8A, as shown in FIG. 8B, the wedge member 7 is moved by the pressing protrusion 9f along with the normal rotation operation of the second metal fitting 9. The wedge member 7 is pressed toward the spreading side of the wedge-shaped gap 5 and moved toward the holding recess 4e of the holding plate 4, and the wedge member 7 abuts on the guide step 4h in the middle of the wedge member 7 so that the biasing spring 8 is pressed. The wedge member 7 is guided to the receiving plate portion 3a side against the urging force, and as a result, the engagement between the tooth portion 7b of the wedge member 7 and the gear portion 9c is released. Further, by rotating the second metal fitting 9 in the positive direction S, as shown in FIG. 8C, the wedge member 7 is pushed into the holding concave portion 4e by the pressing projection 9f, and the wedge member 7 is biased. The tooth portion 7b is held in a state where it does not mesh with the gear portion 9c against the urging force of the spring 8, and the second metal fitting 9 is allowed to rotate in the reverse direction G. Further, the wedge member 7 being pressed by the pressing protrusion 9f comes into contact with the bottom of the holding recess 4e, thereby preventing further rotation of the second metal fitting 9 in the positive direction S.

  Further, in this state, the stopper portion 9h provided on the front edge of the front wall portion of the second metal fitting 9 is connected to the first metal fitting 1 (more specifically, the receiving plate portion 3a of the receiving member 3 of the first metal fitting 1). In this way, even if an overload in the positive rotation direction S is applied to the second metal fitting 9, the stopper 3 j provided on the upper edge) is abutted. The rotation in the positive direction S is more firmly prevented by the stopper portion 9 h of the second metal fitting 9 abutting against the stopper portion 3 j of the first metal fitting 1.

  In the state shown in FIG. 8C, since the second metal fitting 9 is allowed to rotate in the reverse direction S as described above, the second metal fitting 9 is rotated in the reverse direction G as shown in FIG. 8D. Can do.

  9A and 9B illustrate an operation of pushing the wedge member 7 in the holding recess 4e out of the holding recess 4e in order to prevent the second fitting 9 of the angle adjusting bracket 10 of the present embodiment from rotating in the reverse direction G. It is a figure to do.

  In the angle adjustment fitting 10 shown in FIG. 9, the wedge member 7 is disposed and held in the holding recess 4e, and the tooth portion 7b is not engaged with the gear portion 9c. Therefore, the second fitting 9 is rotated in the reverse direction G. The movement is allowed. From this state, the second metal fitting 9 arranged in a substantially unfolded state with respect to the first metal fitting 1 is strongly rotated in the reverse direction G, whereby the wedge member 7 is moved from the inside of the holding recess 4e by the push-out protrusion 9e. Push to the 5th side. Then, as shown in FIG. 9B, the wedge member 7 is engaged with the gear portion 9 c by the biasing force of the biasing spring 8, and the wedge member 7 moves along with the reverse rotation operation of the second metal fitting 9. The wedge-shaped gap 5 is slightly moved toward the narrow side, and the back surface 7 c of the wedge member 7 is received in contact with the plate surface 3 k of the receiving plate portion 3 a of the receiving member 3. Thereby, rotation of the 2nd metal fitting 9 in the reverse direction G is blocked | prevented.

  Thus, the angle adjustment fitting 10 of the present embodiment has the following advantages.

  According to this angle adjustment fitting 10, the rotation of the second fitting 9 in the reverse direction G is not prevented only by the engagement of the tooth portion 7b of the wedge member 7 with the gear portion 9c of the second fitting 9. Further, since the back surface 7c of the wedge member 7 is received in contact with the plate surface 3k of the receiving plate portion 3a of the receiving member 3 while the tooth portion 7b is engaged with the gear portion 9c, the second portion is prevented. When the metal fitting 9 is prevented from rotating in the reverse direction G, the load applied to the gear tooth portion 9d of the gear portion 9c can be reduced. Therefore, the gear tooth portion 9d of the gear portion 9c can be reduced, and the number of gear tooth portions 9d can be increased. As a result, the number of angle adjustment steps can be increased.

  Further, the receiving member 3 of the first metal fitting 1 is made of a bent metal product having a U-shaped cross section having a receiving plate portion 3a and both side plate portions 3b, 3b, and therefore the receiving member 3 can be easily manufactured. Can do.

  Further, the tooth portion 7b of the abdominal surface 7a of the wedge member 7 is engaged with the gear portion 9c and the back surface 7c of the wedge member 7 is received in contact with the plate surface 3k of the receiving plate portion 3a of the receiving member 3, whereby the second Since the metal fitting 9 is prevented from rotating in the reverse direction G, a large load is applied to the receiving plate portion 3a of the receiving member 3 from the wedge member 7 when the second metal fitting 9 is prevented from rotating in the reverse direction G. However, the receiving plate portion 3a is reinforced by bending a pair of opposite side plate portions 3b and 3b from both side edges in the width direction. Therefore, even if the thickness of the receiving plate portion 3a is not necessarily increased, the load can be received firmly by the plate portion 3a. Thereby, the angle adjustment fitting 10 can be reduced in size (and further reduced in weight), and the rotation of the second fitting 9 in the reverse direction G can be reliably prevented.

  Moreover, the back surface 7c of the wedge member 7 is not received by the wedge surface formed by the edge surfaces of the two wedge-shaped window portions spaced apart from each other like the above-described conventional latter angle adjusting fitting, but the receiving member 3 Therefore, the back surface 7c of the wedge member 7 can be stably received, and the wedge member 7 is moved in the width direction by the side plate portions 3b and 3b of the receiving member 3. Therefore, when the second metal fitting 9 is prevented from rotating in the reverse direction G, the problem that the wedge member 7 falls off from the wedge-shaped gap 5 in the width direction does not occur, so that the rotation of the second metal fitting 9 in the reverse direction G does not occur. The movement can be prevented more reliably.

  A holding recess 4e for holding the wedge member 7 in a state where the tooth portion 7b does not mesh with the gear portion 9c is formed on the side plate portion 3b and the side plate portion 3b on the wide side of the wedge-shaped gap 5 between the side plate portions 3b and 3b of the receiving member 3. It is formed at the edge of the holding plate 4 arranged substantially in parallel. Therefore, when allowing the second metal fitting 9 to rotate in the reverse direction G, the tooth member of the wedge member 7 is moved by moving the wedge member 7 toward the widening side of the wedge-shaped gap 5 and disposing it in the holding recess 4e. The wedge member 7 is held in a state where 7b does not mesh with the gear portion 9c. Thereby, the rotation of the second metal fitting 9 in the reverse direction G can be allowed. Further, in this state, since the tooth portion 7b of the wedge member 7 is not meshed with the gear portion 9c, a large load is not applied to the holding plate 4. Thereby, the wedge member 7 can be held without necessarily increasing the thickness of the holding plate 4, that is, the thickness of the holding plate 4 can be set as thin as possible. Miniaturization can be achieved.

  Further, since the holding plate 4 is formed separately from the receiving member 3, the holding plate 4 can be easily manufactured.

  Further, since the holding plate 4 is engaged with the intermediate portion in the width direction of the receiving plate portion 3a of the receiving member 3 so as not to move in the width direction of the receiving plate portion 3a, the holding plate 4 extends in the width direction of the receiving plate portion 3a. The malfunction which moves can be prevented and the wedge member 7 can be reliably hold | maintained.

  Further, since the wedge member 7 is constantly urged toward the gear portion 9c by the urging spring 8, the tooth portion 7b of the wedge member 7 can be reliably engaged with the gear portion 9c.

  Furthermore, in the state where the end 4a on the receiving plate 3a side of the holding plate 4 is disposed between the end portions 3c, 3c on the holding plate 4 side of the both side plate portions 3b, 3b of the receiving member 3, these ends. Since the portions 4a, 3c, and 3c are connected to each other via the connecting shaft 2f, the holding plate 4 can be reliably disposed between the side plate portions 3b and 3b of the receiving member 3, and the receiving member 3 and The holding plate 4 can be integrally connected via the connecting shaft 2f, and the angle adjusting bracket 10 can be easily assembled and manufactured.

  Further, since the receiving member 3, the holding plate 4, and the outer wall portions 2b, 2b of the first metal fitting body 2 are connected to each other via the connecting shaft 2f, the receiving member 3, the holding plate 4, and the first The metal fitting body 2 can be integrated.

  Further, end portions 3e and 3e on the rotating shaft 9j side of both side plate portions 3b and 3b of the receiving member 3 and an end portion 4c on the rotating shaft 9j side of the holding plate 4 are pivotally supported by the rotating shaft 9j. Therefore, the receiving member 3, the holding plate 4, and the second metal fitting 9 can be integrally connected via the rotation shaft 9j, and the angle adjusting metal fitting 10 can be easily assembled and manufactured.

  In addition, the two coil portions 8a and 8a of the biasing spring 8 straddle the holding plate 4 so that both the coil portions 8a and 8a are extrapolated to the connecting shaft 2f, and the two coil portions 8a and 8a are connected to each other. Since the connecting spring wire portion 8b is locked and held in the locking groove portion 4g (locking portion) of the holding plate 4, the biasing spring 8 can be held more securely and the biasing spring 8 is held. The configuration can be simplified.

  In addition, both end portions 8c, 8c of both coil portions 8a, 8a of the urging spring 8 are pressed against the width direction both ends of the back surface 7c of the wedge member 7 by the torsional restoring force generated in each coil portion 8a. 7 is urged, the wedge member 7 can be urged toward the gear portion 9c in a balanced manner in the width direction thereof, whereby the tooth portion 7b of the wedge member 7 is more reliably applied to the gear portion 9c. Can be engaged.

  In addition, since the first bead portion 3h is formed on the receiving plate portion 3a of the receiving member 3, the receiving plate portion 3a can be reinforced by the first bead portion 3h. Accordingly, the load from the wedge member 7 can be reliably received by the plate portion 3a without necessarily increasing the thickness of the receiving plate portion 3a.

  Further, the first bead portion 3h is formed to bend toward the gear portion 9c and extend in the length direction of the receiving plate portion 3a at a portion of the receiving plate portion 3a of the receiving member 3 that contacts the back surface 7c of the wedge member 7. Therefore, with respect to the gap dimension between the receiving plate portion 3a and the gear portion 9c, that is, the wedge-shaped gap 5, the tooth portion 7b of the wedge member 7 is geared when the second metal fitting 9 is prevented from rotating in the reverse direction G. Fine adjustment can be easily performed so as to securely mesh with the portion 9c.

  Moreover, since the 2nd bead part 3i is formed in the receiving plate part 3a of the receiving member 3, the receiving plate part 3a can be reinforced with the 2nd bead part 3i. As a result, the load from the wedge member 7 can be reliably received by the plate portion 3a without necessarily increasing the thickness of the receiving plate portion 3a, and the angle adjusting bracket 10 can be further downsized. be able to.

  Further, since the second bead portion 3i is formed at a portion of the receiving plate portion 3a that does not contact the back surface 7c of the wedge member 7, the movement of the wedge member 7 within the wedge-shaped gap 5 is caused by the second bead portion 3i. There is no inhibition.

  Further, in the seat chair 20 of the present embodiment, a predetermined portion of the seat frame 21 is fixedly connected to the seat frame mounting portion 2a of the first metal fitting 1 (first metal fitting main body portion 2) of the angle adjusting fitting 10. In addition, a predetermined portion of the back frame 22 is fixedly connected to the back frame mounting portion 9 a of the second metal fitting 9. Therefore, in the seat chair 20, the angle adjusting bracket 10 has the same effect as the above effect.

  Although one embodiment of the present invention has been described above, the present invention is not limited to that shown in the above embodiment, and various modifications can be made.

  In addition, the angle adjusting bracket according to the present invention is not limited to being used for reclining seats such as a seat chair and a vehicle seat, and in addition to a footrest, a headrest, an armrest, etc. in a bed or a chair. It may be used, and may be used for a metal fitting for adjusting the angle of a panel such as a liquid crystal display panel, that is, a joint metal fitting for connecting one member and the other member so that the angle formed by both members can be arbitrarily adjusted. Can be used.

  Moreover, in the said embodiment, although the opening angle range of the 2nd metal fitting 9 with respect to the 1st metal fitting 1 in the angle adjustment metal fitting 10 is about 95 degrees-about 180 degrees, in this invention, this opening angle is the said range. It is not particularly limited, and various changes can be made according to the purpose of use and application.

  The present invention can be used for an angle adjusting bracket used for a reclining seat (for example, a seat chair or a vehicle seat).

FIG. 1 is a perspective view showing a seat chair as a reclining seat provided with an angle adjusting bracket according to an embodiment of the present invention. FIG. 2 is a perspective view of the same angle adjusting bracket. FIG. 3 is a plan view of the same angle adjusting bracket. 4 is a cross-sectional view taken along the line ZZ in FIG. FIG. 5A is an exploded perspective view of the same angle adjustment fitting. FIG. 5B is a cross-sectional view of the receiving member of the same angle adjusting bracket. FIG. 5C is a perspective view of a wedge member of the same angle adjustment fitting. FIG. 6A is a perspective view of the same angle adjustment fitting in the middle of assembly. FIG. 6B is a partially cutaway perspective view of the same angle adjusting bracket. FIG. 7A is a schematic cross-sectional view of a state where the second metal fitting is prevented from rotating in the reverse direction in the same angle adjustment metal fitting. FIG. 7B is a schematic cross-sectional view of a state in the middle of rotating the second metal fitting in the forward direction from the state shown in FIG. 7A. FIG. 7C is a schematic cross-sectional view showing a state in which the second metal fitting is prevented from rotating in the reverse direction from the state shown in FIG. 7B. FIG. 8A is a schematic cross-sectional view showing a state where rotation in the reverse direction is prevented with respect to the second metal fitting that has been rotated to the maximum in the forward direction in the same angle adjusting metal fitting. FIG. 8B is a schematic cross-sectional view of a state in the middle of pressing the wedge member toward the widening side of the wedge-shaped gap from the state shown in FIG. 8A with the pressing protrusion of the second metal fitting. FIG. 8C is a schematic cross-sectional view of a state in which the wedge member is pushed into the holding recess and held by the pressing protrusion of the second metal fitting from the state shown in FIG. 8B. FIG. 8D is a schematic cross-sectional view of a state in the middle of rotating the second metal fitting in the reverse direction from the state shown in FIG. 8C. FIG. 9A is a schematic cross-sectional view showing a state in which the wedge member held in the holding recess in the same angle adjustment fitting is being pushed out of the holding recess by the extrusion protrusion of the second fitting. FIG. 9B is a schematic cross-sectional view showing a state where the wedge member is pushed out from the holding recess from the state shown in FIG. 9A and the second metal fitting is prevented from rotating in the reverse direction.

Explanation of symbols

1: 1st metal fitting 2: 1st metal fitting main-body part 2f: Connecting shaft 3: Receiving member 3a: Receiving plate part 3b: Side plate part 3g: Engaging recessed part 3h: 1st bead part 3i: 2nd bead part 3k: Plate surface 4: Holding plate 4e: Holding recess 4f: Engaging recess 4g: Locking groove (locking portion)
5: Wedge-shaped gap 7: Wedge member 7a: Abdominal surface 7b: Tooth portion 7c: Back surface 8: Biasing spring 8a: Coil portion 8b: Connection spring wire portion (intermediate portion)
8c: End portion 9: Second metal fitting 9c: Gear portion 9j: Rotating shaft 10: Angle adjusting metal fitting 20: Seat chair (reclining seat)
S: Forward rotation direction G: Reverse rotation direction

Claims (9)

A first bracket having a receiving member;
A second metal fitting connected to the first metal fitting via a rotation shaft so as to be rotatable in both forward and reverse directions relative to the receiving member;
A wedge member,
The receiving member is a U-shaped metal plate having a receiving plate portion arranged to face the gear portion and a pair of opposed side plate portions bent from both side edges in the width direction. Consisting of
The wedge member is movable between the side plate portions of the receiving member and in the wedge-shaped gap between the receiving plate portion and the gear portion, and is movable in the length direction of the wedge-shaped gap and the both side plates. Is disposed in a state in which movement in the width direction is restricted by the portion, and a tooth portion formed on the abdominal surface facing the gear portion side meshes with the gear portion and a back surface facing the receiving plate portion side. An angle adjusting bracket that prevents the second bracket from rotating in the reverse direction by being received in contact with the plate surface of the receiving plate portion.   A holding plate in which the holding recess for holding the wedge member in a state in which the tooth portion does not mesh with the gear portion is disposed substantially parallel to the side plate portion on the spreading side of the wedge-shaped gap between the side plate portions of the receiving member. The angle adjusting bracket according to claim 1, wherein the angle adjusting bracket is formed on an edge of the angle adjusting device. The holding plate is formed separately from the receiving member,
The engaging recess provided in the intermediate portion in the width direction of the receiving plate portion of the receiving member and the engaging recess provided in the holding plate are fitted to each other, whereby the holding plate receives the receiving member. 3. The angle adjusting bracket according to claim 2, wherein the angle adjusting bracket is engaged with the intermediate portion in the width direction of the plate portion so as not to move in the width direction of the receiving plate portion. The wedge member is biased toward the gear portion by a biasing spring,
The biasing spring is latched and held by a latching portion provided on the holding plate at an intermediate portion of the biasing spring in a state where both ends of the biasing spring straddle the holding plate,
The angle according to claim 2 or 3, wherein both ends of the biasing spring are pressed against both ends in the width direction of the back surface of the wedge member by a restoring force generated in the biasing spring. Adjustment bracket. These portions are connected to each other via a connecting shaft in a state where the portions on the holding plate side of the holding plate are arranged between the portions on the holding plate side in the both side plate portions of the receiving member. ,
The biasing spring is formed of a torsion coil spring having a coil portion divided into two at an intermediate portion of the biasing spring,
In a state where the two coil portions of the biasing spring straddle the holding plate, the two coil portions are extrapolated to the connecting shaft, and a connecting spring wire portion connecting the two coil portions is the engagement of the holding plate. It is locked and held at the stop,
5. The wedge member is biased by pressing both end portions of both coil portions of the biasing spring against both end portions in the width direction of the back surface of the wedge member by a torsional restoring force generated in each coil portion. Angle adjustment bracket as described. While the portions on the holding plate side of the holding plate are arranged between the portions on the holding plate side of the both side plate portions of the receiving member, these portions are connected to each other via a connecting shaft. ,
The part of the said rotating shaft side in the both-sides board part of the said receiving member and the part of the said rotating shaft side in the said holding plate are pivotally supported by the said rotating shaft. Angle adjustment bracket.   The first bead portion that is bent toward the gear portion side and extends in the length direction of the receiving plate portion is formed at a portion of the receiving plate portion of the receiving member that contacts the rear surface of the wedge member. The angle adjustment metal fitting in any one of -6.   The second bead portion extending in the width direction of the receiving plate portion is formed at a portion of the receiving plate portion of the receiving member that does not contact the back surface of the wedge member. The described angle direct bracket.   A reclining seat, wherein a seat frame is connected to the first metal fitting of the angle adjusting metal fitting according to any one of claims 1 to 8, and a back frame is connected to the second metal fitting of the angle adjusting metal fitting.

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