JP2005111611A - Fastener - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fastener capable of performing fastening work of the fastener to various fastened members of different directions. <P>SOLUTION: The fastener comprises a turning means 5 for turning a cylinder block 3 to a predetermined angle with the cylinder block 3 held and a nut runner 7 for fastening a bolt to the cylinder block 3 held by the turning means 5. The nut runner 7 is constituted movably in three axis directions with respect to the cylinder block 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a fastening device including a nut runner for fastening a bolt or the like to a cylinder block of an automobile, for example.

  Conventionally, an upper cover, a chain case, and the like are fastened to a cylinder block of an automobile via a large number of bolts. These bolts are generally fastened using a nut runner.

  The nut runner is provided with a socket that is engaged with a bolt head and is driven to rotate, and is suspended by an elevating cylinder having a counter balance so that the socket faces downward. The cylinder block is fastened with bolts while being supported in an upward posture so as to be able to engage with the socket. A rotary motor such as an electric motor or an air motor is used as a drive source for rotationally driving the nut runner socket.

As such a nut runner, a multi-axis nut runner that simultaneously fastens most of the bolts used in the cylinder block is employed. As this multi-axis nut runner, a configuration is proposed in which a plurality of nut runners are provided and the pitch between these nut runners is made variable (see, for example, Patent Document 1).
JP 2002-239853 A

  However, in the conventional example, the variable amount of each nut runner interval is limited, and the fastening direction of the bolts is set at various angles depending on the fastening portion, so that a single nut runner can be used for various types of engines. It was difficult to perform the fastening work.

  Then, this invention aims at providing the fastening apparatus which can perform the fastening operation | work of a fastener to many types of to-be-fastened members from which a fastening direction differs.

  In order to achieve the above object, a fastening device according to the present invention includes a rotating means for rotating a fastening member to a predetermined angle while holding the fastened member, and a fastening member on the fastened member held by the turning means. A fastening means for fastening, and the fastening means is configured to be movable in three axial directions with respect to the fastened member.

  According to the fastening device according to the present invention, since the fastened member can be turned to a predetermined angle, the fastened member can be turned to a turning angle suitable for fastening work. Further, since the fastening means is movable in the three axial directions with respect to the fastened member, the fastening work can be performed even when the fastening part is changed.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view showing an entire fastening device 1 according to an embodiment of the present invention. In the following, an embodiment using the engine cylinder block 3 as a member to be fastened will be described.

  As shown in FIG. 1, the fastening device 1 according to the present embodiment roughly includes a rotating means 5 for holding and rotating the cylinder block 3, and a bolt on the cylinder block 3 held by the rotating means 5. The nut runner 7 is a fastening means for fastening the nut, the crankshaft turning means 9 for turning the crankshaft (not shown) of the cylinder block 3, and the sockets 11 and 13 attached to the tip of the nutrunner 7. And a socket mounting table 15 to be placed.

  The rotating means 5 includes a rotating device 19 configured to run on a conveyor 17 laid on the floor F, and a driving device 21 fixed on the floor F.

  FIG. 2 is a perspective view showing the turning device 19 according to the present embodiment, and FIG. 3 is an enlarged front view showing the turning means 5 including the turning device 19 and the drive device 21 according to the present embodiment.

  As shown in FIGS. 2 and 3, the rotation device 19 includes a lower support base 23, a rotation device main body 25 attached on the support base 23, and a support shaft on the rotation device main body 25. 27, a holding member 29 that is pivotally supported via 27, and a pin-like member 35 that is removably supported in a plurality of locking holes 33 formed in the holding member 29.

  As described above, the support shaft 27 and the pin-shaped member 35 are disposed in the longitudinal direction of the rotating device body 25, and as shown in FIG. The part protrudes from the rotation device main body 25 and penetrates the arm 37, and a fitting member 39 is fixed to the tip thereof. Two fitting grooves 41, 41 are formed on the side surface of the fitting member 39 at intervals in the vertical direction. The support shaft 27 passes through the arm 37. In this state, the arm 37 is pivotally supported by the support shaft 27, and a pin-like member 35 is swingable at the lower end of the arm 37. It is supported. Therefore, when the handle 43 provided at the upper end of the arm 37 is gripped and pushed in the direction of the arrow (leftward) in FIG. While swinging, the lower side of the arm 37 swings to the right, and the pin-shaped member 35 also moves to the right. Further, the left end of the support shaft 27 in FIG. 3 is fixed to the holding member 29, and when the fitting member 39 rotates, the holding member 29 also rotates simultaneously via the support shaft 27, and this holding is further performed. A cylinder block (indicated by a two-dot chain line) 3 fixed to the member 29 also rotates in synchronization. A balance weight 31 for holding the holding member 29 in the lower position is attached to the lower end of the holding member 29, and the lower end of the arm 37 is not shown, but the lower end is shown in the left of FIG. A biasing means for biasing in the direction is disposed.

  As shown in FIGS. 1 and 3, the drive device 21 is mounted on a base 47 fixed on the floor F, and can be moved forward and backward to the rotating device 19 side. A slide shaft 49 configured to be rotatable in the circumferential direction, a locking member 51 attached to the tip of the slide shaft 49, and disposed above the slide shaft 49 so as to advance and retreat toward the rotation device 19 side. The contact member 53 is supported by a rotation member 55 and a rotation drive unit 55 that rotates the slide shaft 49.

  The slide shaft 49 is formed in a column shape extending in the lateral direction and slides in the left-right direction in FIG. 3 and rotates. And the protrusions 57 and 57 are arrange | positioned at intervals at the front-end | tip of the latching member 51, These protrusions 57 and 57 are the fitting grooves 41 of the fitting member 39 of the said rotation apparatus 19. FIG. It is formed so that it may fit. The contact member 53 is configured such that the tip of the contact member 53 comes into contact with the upper end of the arm 37 and the lower side of the arm 37 is rotated rightward.

  FIG. 4 is an enlarged perspective view showing the nut runner 7. In this nut runner 7, a large torque nut runner 59 that requires a large rotational torque and a small torque nut runner 61 that can be fastened with a rotational torque smaller than that of the large torque nut runner 59 are opposed to each other. As shown in FIG. 1, four places are installed at the ends of the fastening device 1 in the left-right front-rear direction. The large torque nut runner 59 and the small torque nut runner 61 are supported on the travel rail 83 so as to be relatively movable in a uniaxial direction.

  The large torque nut runner 59 is configured such that the socket 11 is movable in the z direction (vertical direction) by a large torque cylinder 63 and an elevating cylinder 65. The large torque nut runner 59 is fixed to a first support plate 69 having an L-shaped cross section, and the first support plate 69 is attached to the rod tip of the elevating cylinder 65. The first support plate 69 is supported by the second support plate 73 via the rail member 71 so as to be slidable in the z direction. Further, the elevating cylinder 65 is attached to the second support plate 73, and the second support plate 73 slides in the y direction (left-right direction) with respect to the third support plate 75 via the rail member 71. The third support plate 75 is fixed to a fourth support plate 77 so as to be movable. Further, the fourth support plate 77 is supported by the traveling rail member 83 via the rail member 71 so as to be slidable in the x direction.

  Here, the support structure for the rail member 71 of the running rail member 83 of the fourth support plate 77 will be briefly described. The first support plate 69, the second support plate 73, and the third support plate other than the fourth support plate 77 are described. 75 etc. are configured in the same structure.

  As shown in FIG. 4, the fourth support plate 77 is provided with an upper wall portion 79 extending in the left-right direction (y direction), and extending downward (z direction) from the end portion of the upper wall portion 79. The vertical wall portion 81 is bent to have a substantially L-shaped cross section. On the other hand, a traveling rail member 83 formed in a rectangular tube shape is extended in the front-rear direction (x direction), and a traveling rail portion 87 and the traveling rail are provided on an upper surface 85 of the traveling rail member 83. A meshing rail portion 89 is laid along the portion 87, and one traveling rail portion 87 is laid on the side surface of the traveling rail member 83. A rail 91 that engages with the traveling rail portion 87 and the meshing rail portion 89 is disposed on the back surface of the upper wall portion 79. A gear (not shown) is disposed on the back surface side of the upper wall portion 79 of the fourth support plate 77, and the gear meshes with the teeth of the meshing rail portion 89. When the drive motor 93 disposed in the portion 79 is operated, the gear coupled to the drive motor 93 rotates, and the fourth support plate 77 can travel in the x direction with respect to the travel rail member 83. .

  The small torque nut runner 61 is configured such that the socket 13 is movable in the vertical direction by a small torque cylinder 95 and an elevating cylinder 67. The small torque nut runner 61 is fixed to a fifth support plate 97, and the fifth support plate 97 is fixed to a vertical wall portion 81 of the fourth support plate 77 through a rail member 71.

  The socket 11 attached to the tip of the large torque nut runner 59 is formed larger than the socket 13 attached to the small torque nut runner 61. The torque by a rotary drive device (not shown) for rotating the sockets 11 and 13 attached to the tip of the nut runner 7 is set so that the large torque nut runner 59 is larger than the small torque nut runner 61. ing.

  Moreover, as shown in FIG. 1, the socket mounting base 15 is arrange | positioned at the upper part of the four support | pillar 99, respectively. These socket mounting bases 15 are within the range of movement of the nut runner 7, and are arranged with a plurality of sockets 11 and 13 along the traveling rail 83, and are directed toward the inner side of the four columns 99. Five socket housing holes 101 are formed along the front-rear direction. Both the socket 11 of the large torque nut runner 59 and the socket 13 of the small torque nut runner 61 can be accommodated in the socket accommodation hole 101. Only the socket 11 of the large torque nut runner 59 may be accommodated, or only the socket 13 of the small torque nut runner 61 may be accommodated.

  FIG. 5 is a front view of the crankshaft rotating means 9 as viewed from the rear, and shows the cylinder block 3 arranged upside down by a two-dot chain line.

  The crankshaft rotating means 9 includes a locking portion 105 that is locked to the crankshaft end portion 103 of the cylinder block 3 and a drive portion 111 that moves the locking portion 105 forward and backward.

  A crankshaft end portion 103 protrudes laterally from the lower portion of the cylinder block 3, and a protruding portion 107 is formed at the upper end portion of the end portion 103 in the radial direction. On the other hand, the locking portion 105 of the crankshaft turning means 9 is formed with a key groove 109 that engages with the crankshaft end portion 103. Therefore, as shown in FIG. 5, when the locking portion 105 of the crankshaft rotating means 9 moves forward and engages with the crankshaft end portion 103, the protrusion 107 becomes a detent with respect to the locking portion 105. . Therefore, by actuating the drive unit 111 and rotating the locking unit 105, the crankshaft (see FIG. 6) 113 can also rotate in synchronization and hold the drive unit 111 at a predetermined rotation angle. .

  An adapter jig may be engaged with the crankshaft end 103 and the adapter jig may be rotated by the crankshaft rotating means 9.

  As shown in FIG. 6, the cylinder block 3 has a drive unit 111 rotatably supported on the lower side (upper side in FIG. 6) in the vehicle-mounted state. The drive unit 111 is rotatably supported at the lower part of the cylinder block 3, and the left end 103 in FIG. 6 is connected to a speed reducer (not shown). The drive unit 111 is a shaft that changes the reciprocating motion of the piston into a rotational motion in the reciprocating engine. As shown in FIG. 7, a connecting rod 115 and a connecting rod cap 117 are rotatably attached to the crank pin 119. Yes.

  That is, as shown in FIG. 7, the crank pin 119 constituting the drive unit 111 is sandwiched between the connecting rod 115 and the connecting rod cap from above and below. In this case, with the cylinder block 3 turned upside down, the connecting rod 115 is pressed against the crank pin 119 from below, and the connecting rod cap 117 is pressed against the crank pin 119 from above. In this state, the connecting rod cap A bolt 121, which is a fastener, is inserted into an insertion hole 123 formed in 117, and screwed into a bolt hole 125 of the connecting rod 115.

  A procedure for bolting the connecting rod cap 117 to the cylinder block 3 using the fastening device 1 having the above-described configuration will be briefly described.

  First, as shown in FIGS. 1 and 2, the cylinder block 3 is fixed to the holding member 29 of the rotation device 19. In this case, the cylinder block 3 is turned upside down using an assisting device (not shown), and the cylinder block 3 is attached to the holding member 29 of the rotating device shown in FIGS.

  Next, the rotation device 19 is slid forward on the conveyor 17 and moved to a position between the drive device 21 and the crankshaft rotation means 9. And as shown in FIG. 3, the drive device 21 of the rotation means 5 is operated and the locking member 51 and the contact member 53 are advanced.

  When the protrusion 57 of the locking member 51 is fitted in the fitting groove 41 of the fitting member 39, the tip of the contact member 53 is abutted against the upper end of the arm 37, and the arm 37 rotates in the direction of the arrow. The shaped member 35 is pulled out from the locking hole 33 of the holding member 29 so that the holding member 29 can rotate.

  After that, when the driving device 21 is driven to rotate the locking member 51, the holding member 29 and the cylinder block 3 are rotated via the support shaft 27, and the locking member 51 is stopped at a predetermined position to pin the pin. The member 35 is inserted into the locking hole 33. At the same time, as shown in FIG. 1, the nut runner 7 is moved in the three-axis direction and disposed near the fastening portion of the cylinder block 3.

  Then, as shown in FIG. 5, the crankshaft end 103 of the cylinder block 3 is rotated by the crankshaft rotating means 9 and held at a predetermined position. Thereafter, as shown in FIG. 7, the connecting rod cap 117 can be bolted to the connecting rod 115 by fastening the bolt 121 from above.

  Hereinafter, functions and effects of the embodiment of the present invention will be described.

  Since the nut runner 7 as the fastening means is configured to be movable in the x, y, and z directions (three axis directions) in FIG. 1, and the cylinder block is configured to be rotatable at a predetermined angle by the rotating means 5, the cylinder block The bolts can be fastened to various fastening parts.

  The rotation means 5 is composed of a rotation device 19 and a drive device 21, and the pin-shaped member 35 is inserted into and removed from the holding member 29 to hold the holding member 29. Holding at a predetermined angle can be performed.

  Since the nut runner 7 is arranged at four places on the fastening device 1 corresponding to the fastening parts that are symmetric with respect to the cylinder block 3, a uniform fastening load is applied to the cylinder block 3 and stable fastening work is performed. It can be performed.

  Since the nut runner 7 and the sockets 11 and 13 are used as the fastening means, the bolt fastening operation can be performed easily and reliably.

  Since the socket mounting table 15 is disposed in the fastening device 1, the sockets 11 and 13 having different sizes and types can be appropriately replaced.

  The nut runner 7 supports a large torque nut runner 59 and a small torque nut runner 61 as a pair, and a support member that can move on the running rail 83 so as to be relatively movable in one axial direction. For this reason, bolt tightening is performed using a large torque nut runner 59 to a portion requiring a large fastening torque (for example, a fastening portion of a cylinder head), and a portion requiring a small fastening torque (for example, a bearing portion of a cam). The nut runners 7 can be appropriately used depending on the fastening portion so that the bolt runner is fastened using the nut runner 59 for large torque.

  Since the cylinder block 3 can be a member to be fastened, it is possible to efficiently assemble an engine having complicated and various fastening parts.

  Since the crankshaft rotating means 9 is provided, the crankshaft 113 can be rotated and held up to a predetermined angle. As a result, the phase of the crankshaft 113 can be arranged near the bottom dead center, and the connecting rod cap 117 can be bolted efficiently.

  Since the crankshaft rotating means 9 is constituted by the locking portion 105 and the driving device, if the locking portion 105 is engaged with the end of the driving portion 113 and rotated by the driving device, the driving portion 113 is rotated a predetermined time. It can be rotated and held at a moving angle.

It is a perspective view showing the whole fastening device by the embodiment of the present invention. It is a perspective view which expands and shows the rotation apparatus of FIG. It is a front view which expands and shows the rotation means which consists of the rotation apparatus and drive device by this embodiment. It is a perspective view which expands and shows the nut runner of FIG. It is a front view which expands and shows the crankshaft rotation means by this embodiment. It is the schematic which looked at the cylinder block from the side. It is a front view which expands and shows the state which bolts a connecting rod cap to the connecting rod of a cylinder block.

Explanation of symbols

1 ... Fastening device 3 ... Cylinder block (member to be fastened)
5 ... Rotating means 7 ... Nut runner (fastening means)
DESCRIPTION OF SYMBOLS 9 ... Crankshaft rotation means 11, 13 ... Socket 15 ... Socket mounting base 25 ... Rotating device main body 29 ... Holding member 33 ... Locking hole 35 ... Pin-shaped member 59 ... Large torque nut runner 61 ... Small torque nut Runner 105 ... Locking part 111 ... Drive part 113 ... Crankshaft 121 ... Bolt (fastener)

Claims (8)

  A rotating means for rotating the member to be fastened to a predetermined angle while holding the member to be fastened; and a fastening means for fastening a fastener to the member to be fastened held by the turning means. A fastening device configured to be movable in three axial directions with respect to a member.   The fastening means includes a nut runner for fastening bolts or nuts, and the nut runner has a large torque nut runner having a large fastening torque and a small torque having a smaller fastening torque than the large torque nut runner. 2. The nut runner according to claim 1, wherein the nut runner is supported by a support member movable on a traveling rail so as to be movable relative to each other in a uniaxial direction. Fastening device.   The rotating means includes a rotating device main body, a holding member pivotally supported by the rotating device main body and having a plurality of locking holes, and a holding member inserted into the locking holes. A pin-shaped member configured to be movable forward and backward, and a drive device that rotationally drives the holding member. In an initial state, the pin-shaped member is inserted into the locking hole to hold the holding member. The fastening device according to claim 1, wherein when the fastening device is fastened and the fastener is fastened, the driving device is operated to rotate the holding member to a predetermined angle. The fastening means includes the nut runner for fastening a bolt or a nut, and a socket attached to the tip of the nut runner,
The fastening device according to any one of claims 1 to 3, further comprising a socket mounting table that is within a range of movement of the nut runner and that arranges a plurality of sockets along a traveling rail. .   The fastening device according to claim 1, wherein the member to be fastened is a cylinder block of an engine.   The fastening device according to claim 5, further comprising crankshaft rotating means for rotating the crankshaft of the cylinder block of the engine to a predetermined angle.   The said crankshaft rotation means is provided with the latching | locking part engaged with the longitudinal direction edge part of the crankshaft of a cylinder block, and the drive part which rotates this latching | locking part. The fastening device as described. The fastening device according to any one of claims 1 to 7, wherein the fastening means is arranged at least four locations corresponding to fastening sites that are symmetrical with respect to the fastened member.

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