JP3196396B2 - Bolt member assembling method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for automatically assembling bolt members into a plurality of bolt insertion holes of a work.

[0002]

2. Description of the Related Art When a bolt member is automatically inserted into a plurality of bolt insertion holes of a work, a plurality of gripping members for detachably holding the bolt member are adjusted to match the arrangement pitch of the bolt insertion holes of the work. Using the placed assembling device, the bolt member is gripped by each gripping member of the assembling device, the assembling device is moved to a place where the work is fixed, and then vertically lowered to insert the bolt member into the insertion hole. (See, for example, JP-A-1-183329).

[0003]

By using such an assembling apparatus, a flanged bolt member is inserted into a bolt insertion hole 1a-1d, 2a-2d of a cylinder head of an engine as shown in FIG. In this case, since a part of the cam cap 3 is overhanging with respect to the insertion holes 1a and 2a, it is attempted to vertically lower the flanged bolt member from above and insert it into the insertion holes 1a to 1d and 2a to 2d. Also, there is a problem that the collar portion interferes with the overhanged portion, so that the bolt member cannot be normally inserted into the insertion holes 1a and 2a.

According to the present invention, since an obstacle exists above the bolt insertion hole, even if the work cannot be normally inserted into the bolt insertion hole only by vertically lowering the bolt member, the bolt is automatically bolted. It is an object of the present invention to provide a method and an apparatus capable of assembling members.

[0003]

In order to achieve the above object, a method of assembling a bolt member according to the present invention is a single assembling method including a plurality of gripping members each of which detachably grips a bolt member. When assembling a plurality of bolt members into the bolt insertion hole by the device, some bolt members are inclined with respect to the insertion hole, and the entire bolt member is inserted with its tip positioned above the tip of the other bolt member When the bolt is lowered into the hole, the tip of another bolt member is inserted into the insertion hole and the descent is stopped, the tip of the bolt member is positioned directly above the insertion hole, and then the bolt member is It is characterized in that it is lowered only, its tip is inserted into the insertion hole and then returned vertically.

[0004] Further, the bolt member assembling apparatus according to the present invention includes a plurality of gripping members each of which detachably grips the bolt member, and some of the gripping members can advance and retreat relative to other gripping members. And swingable around the tip of the bolt member to be gripped.

[0005]

According to the bolt member assembling method or the assembling apparatus according to the present invention, even if the above-mentioned obstacle exists above a part of the bolt insertion hole, the corresponding bolt member is inserted into the insertion hole. On the other hand, since the bolt member descends while being inclined (the head or the brim portion of the bolt member is inclined in a direction to avoid the obstacle), the bolt member descends without interfering with the obstacle and reaches the insertion hole. Then, the tip portion of the bolt member is inserted into the insertion hole while being inclined, and then returned vertically.

In the method for assembling a bolt member according to the present invention, the bolt member that is gripped at an angle to the insertion hole is located above the bolt member that is vertically gripped. The part is inserted into the insertion hole first, and then the former tip is inserted into the insertion hole. Therefore, the positioning of the inclined bolt member with respect to the insertion hole can be performed more reliably.

[0007]

Next, the present invention will be described more specifically with reference to FIGS.

As shown in FIG. 1, the assembling apparatus according to the present invention comprises four holding members 10 to 13 arranged in a line, and opening and closing of the holding members 10 in a plane perpendicular to the direction of the rows of the holding members. Opening / closing mechanism 14 (see phantom line in FIG. 2), opening / closing mechanisms 15 to 17 for opening and closing respective gripping members 11 to 13 in the same direction as the row of gripping members (see phantom line in FIG. 1), and gripping member 10 The swing mechanism 18 for swinging (see the phantom line in FIG. 1) the center of the gripped bolt member B in a plane parallel to the direction of the row of the gripping members, and simultaneously moves the gripping members 10 to 13 up and down. A driving device 19 and a driving device 20 for vertically moving only the gripping member 10 relative to the gripping members 11 to 13 are provided, and can be horizontally moved along the beam 21 as a whole.

The swing mechanism 18 of the gripping member 10 includes a frame 22 and a pair of guide rails 2 fixed to the frame 22.
3. The guide rail 23 is rotatably supported by the support member 24 to which the opening / closing mechanism 14 is attached, and sandwiches the guide rail 23 at three upper and lower positions.
It comprises a pair of guide rollers 25, a cylinder 26 attached to the frame 22, and the like. Also, the guide rail 23
The end of the piston rod 27 of the cylinder 26 is connected to the support member 24 in an arc shape centered on the end of the bolt member B grasped.

Next, a procedure for assembling a bolt member into the bolt insertion holes 1a to 1d of the cylinder head of the engine shown in FIG. 4 using this assembling apparatus will be described. The bolt member to be inserted into the insertion hole 1a is to be gripped by the gripping member 10. First, the bolt member B prepared at a predetermined position is gripped by the gripping members 10 to 13, and at this time, the bolt member B is gripped by the gripping member 10. The bolt member is positioned above the bolt member held by the other holding members 11 to 13 (see FIG. 1).

When the assembling device is horizontally moved to a fixed position on the cylinder head and then the cylinder 26 is operated, the support member 24 moves along the guide rail 23 and swings a predetermined amount around the tip of the bolt member B. (See FIG. 1, virtual line)
The gripping member 10 and the bolt member B also swing and tilt about their tips.

Next, the driving device 19 is operated to lower the gripping devices 10 to 13 toward the respective insertion holes 1a to 1d, and the tip portions of the bolt members gripped by the gripping devices 11 to 13 are inserted into the insertion holes 1b to 1d. insert. At this time, the tip of the bolt member grasped by the grasping device 10 is located immediately above the insertion hole 1a (the state of the solid line in FIG. 3). When the bolt member gripped by the gripping device 10 is kept vertical, the flange portion has the cam cap 3.
Can not descend and interfere with, but in the case of this embodiment,
Since the head is inclined in a direction away from the cam cap 3, there is no obstacle when descending.

Subsequently, the driving device 20 is operated, only the gripping device 10 is lowered, and the tip end portion of the bolt member gripped by the gripping device 10 is inserted into the insertion hole 1a (FIG. 3, state indicated by a broken line). At this time, since the bolt members gripped by the other gripping devices 11 to 13 have already been inserted into the insertion holes 1b to 1d, the positioning of the inclined bolt member with respect to the insertion hole 1a is performed more reliably.

Finally, the cylinder 26 is operated in the opposite direction to return the bolt member to the vertical position (the state shown by the chain line in FIG. 3). After the assembly of all the bolt members is completed, the opening and closing mechanisms 14 to 17 are operated to release the gripping of the bolt members, and the driving device 19 is operated to raise the gripping devices 10 to 13.

As described above, according to the assembling apparatus of this embodiment, each bolt member can be connected to a cylinder head in which a part of the cam cap 3 is overhanging to the insertion holes 1a and 2a. Automatic assembly is possible without interfering with the cam cap. Therefore, a compact cylinder head having a shortened longitudinal direction, that is, a compact engine can be realized.

[0016]

According to the present invention, even if a work cannot be normally inserted into the bolt insertion hole only by vertically lowering the bolt member because an obstacle exists above the bolt insertion hole, the bolt is automatically inserted. A member can be assembled.

[Brief description of the drawings]

FIG. 1 is a front view of a device for assembling a bolt member.

FIG. 2 is a side view of a swingable gripping member in the assembling device.

FIG. 3 is a diagram illustrating a method of assembling a bolt member.

FIG. 4 is a plan view (a) and a side view (b) of a cylinder head.

[Explanation of symbols]

 1a-1d, 2a-2d Bolt insertion hole 3 Cam cap 10 Swingable holding member 11-13 Holding member 14-17 Opening / closing mechanism 18 Swinging mechanism 19 Driving device 20 Driving device 23 Guide rail 25 Guide roller 26 Cylinder B Bolt Element

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-1-183329 (JP, A) JP-A-3-190679 (JP, A) JP-A 4-67938 (JP, U) JP-A 61-183 120428 (JP, U) Japanese Utility Model Application Hei 3-130332 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B23P 19/00-21/00 307

Claims (2)

(57) [Claims] When a plurality of bolt members are assembled to an insertion hole by a single assembling apparatus having a plurality of gripping members for detachably holding the bolt members, some of the bolt members are inclined with respect to the insertion hole. The entire bolt member is lowered into the insertion hole with its tip positioned above the tip of the other bolt member, and when the tip portion of the other bolt member is inserted into the insertion hole and stops descending, the bolt member is stopped. The tip of a part of the bolt member is made to be directly above the insertion hole, then only the part of the bolt member is lowered, the tip part is inserted into the insertion hole, and then returned vertically. Assembly method. 2. An assembling apparatus for a bolt member, comprising: a plurality of gripping members each of which detachably grips the bolt member.
A bolt member assembling device, wherein a part of the gripping members can advance and retreat relative to other gripping members, and can swing about a tip of the bolt member to be gripped.