JPH06226563A - Fitting method for bolt member and device therefor - Google Patents

Abstract

PURPOSE:To automatically fit together a bolt member in a work having an obstacle over the bolt inserting hole. CONSTITUTION:This is a fitting device of a bolt member provided with a plurality of holding members 10-13 to detachably hold respective bolt members. This fitting device is provided with a drive device 20 which can vertically move the holding member 10 relatively, against the other holding members 11-13, and a swing mechanism 18 which can swing the held bolt member centering around the extreme end. The bolt member held by means of the holding member 10 is inclined in the direction of avoiding an obstacle, brought down toward the inserting hole while avoiding the obstacle, inserted into the inserting hole in the inclined condition, and thereafter returned to the vertical condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and 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 that detachably hold the bolt member must be aligned with the arrangement pitch of the bolt insertion holes of the work. Insert the bolt member into the insertion hole by grasping the bolt member with each gripping member of the assembling device, moving the assembling device to the place where the work is placed, and then vertically descending using the arranged assembling device. (See, for example, JP-A-1-183329).

[0003]

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

According to the present invention, since the obstacle is present above the bolt insertion hole as described above, the bolt is automatically automatically inserted into a work that cannot be normally inserted into the bolt insertion hole only by vertically descending the bolt member. It is an object of the present invention to provide a method and a device capable of assembling members.

[0003]

In order to achieve such an object, a method of assembling a bolt member according to the present invention is a single assembling process comprising a plurality of holding members for detachably holding the bolt members. When assembling multiple bolt members into the bolt insertion holes with the device, insert the entire bolt member with some bolt members inclined with respect to the insertion holes and their tips positioned above the tips of other bolt members. When the lower end of the bolt member is lowered into the hole and the lower end of the other bolt member is inserted into the insertion hole and the lowering is stopped, the tip of the part of the bolt member comes directly above the insertion hole, and then the part of the bolt member It is characterized by descending only and inserting the tip part into the insertion hole and then returning it vertically.

Further, the bolt member assembling apparatus according to the present invention is provided with a plurality of gripping members for detachably gripping the bolt members, and some gripping members can move forward and backward relative to other gripping members. And is 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-described obstacle is present above a part of the bolt insertion holes, the corresponding bolt member is inserted into the insertion holes. On the other hand, the bolt member descends in a state of being inclined (the head and the flange portion of the bolt member are inclined in a direction to avoid the obstacle), so that the bolt member descends and reaches the insertion hole without interfering with the obstacle. Then, the tip portion of the bolt member is inserted into the insertion hole while being inclined, and then returned vertically.

In the method of assembling the bolt member according to the present invention, since the bolt member that is inclined and held with respect to the insertion hole is located above the vertically held bolt member, the tip of the latter is The portion is inserted into the insertion hole first, and then the former tip portion is inserted into the insertion hole. Therefore, it is possible to more reliably position the inclined bolt member with respect to the insertion hole.

[0007]

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 opens and closes the four holding members 10 to 13 arranged in a line and the holding member 10 in a plane perpendicular to the direction of the row of the holding members. (See FIG. 2, phantom line) Opening / closing mechanism 14, Opening / closing mechanisms 15-17 for opening / closing each gripping member 11-13 in the same direction as the direction of the row of gripping members (see virtual line in FIG. 1), Gripping member 10 The swinging mechanism 18 for swinging (see FIG. 1, phantom line) about the tip of the bolt member B gripped in a plane parallel to the direction of the row of gripping members, and the gripping members 10 to 13 are simultaneously moved up and down. The driving device 19 and the driving device 20 that moves only the gripping member 10 up and down relative to the gripping members 11 to 13 are provided, and can be horizontally moved along the beam 21 as a whole.

The swinging mechanism 18 of the grip member 10 includes a frame 22 and a pair of guide rails 2 fixed to the frame 22.
3. A guide member 23 is rotatably supported by a support member 24 to which an opening / closing mechanism 14 is attached.
It is composed of a set of guide rollers 25, a cylinder 26 attached to the frame 22, and the like. In addition, the guide rail 23,
It is formed in an arc shape with the tip of the gripped bolt member B as the center, and the tip of the piston rod 27 of the cylinder 26 is connected to the support member 24.

Next, the procedure for assembling the bolt members into the bolt insertion holes 1a-1d of the cylinder head of the engine shown in FIG. 4 using this assembling apparatus will be described. The bolt member inserted into the insertion hole 1a is supposed to be held by the holding member 10. First, the bolt member B prepared at a predetermined position is held by the respective holding members 10 to 13, and at this time, the holding member 10 is held. The bolt member is positioned above the bolt member gripped by the other gripping 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 supporting member 24 moves along the guide rail 23 and swings about the tip of the bolt member B by a predetermined amount. (See Figure 1, phantom line),
The gripping member 10 and the bolt member B also swing and incline about the tip thereof.

Next, the driving device 19 is operated to lower the gripping devices 10 to 13 toward the 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 gripped by the gripping device 10 is positioned directly above the insertion hole 1a (see the solid line in FIG. 3). Note that the bolt member gripped by the gripping device 10 has a flanged portion with the cam cap 3 if it remains vertical.
However, in the case of this embodiment,
Since the head is inclined in the 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 portion of the bolt member gripped by the gripping device 10 is inserted into the insertion hole 1a (state shown by broken line in FIG. 3). 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 inclined bolt members are more reliably positioned with respect to the insertion hole 1a.

Finally, the cylinder 26 is operated in the opposite direction to return the bolt member to the vertical position (the state shown by the one-dot chain line in FIG. 3). Then, after the assembly of all the bolt members is completed, the opening / closing mechanisms 14 to 17 operate to release the grip of the bolt members, and the drive device 19 operates to raise the grip devices 10 to 13.

As described above, according to the assembling apparatus of this embodiment, each bolt member is attached to the cylinder head in which a part of the cam cap 3 overhangs the insertion holes 1a and 2a to the last. It can be automatically assembled without interfering with the cam cap. Therefore, it is possible to realize a compact cylinder head having a shortened longitudinal direction, that is, a compact engine.

[0016]

According to the present invention, since there is an obstacle above the bolt insertion hole, the bolt can be automatically bolted even to a work that cannot be normally inserted into the bolt insertion hole only by vertically lowering the bolt member. The members can be assembled.

[Brief description of drawings]

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

FIG. 2 is a side view of a swingable gripping member in the assembly apparatus.

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 gripping member 11-13 gripping 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

Claims (2)

[Claims] 1. When assembling a plurality of bolt members with respect to an insertion hole by a single assembling device having a plurality of gripping members for detachably gripping each bolt member, a part of the bolt members is inclined with respect to the insertion hole. And when the tip of the other bolt member is lowered into the insertion hole while the tip of the bolt member is positioned above the tip of the other bolt member and the tip portion of the other bolt member is inserted into the insertion hole and stopped lowering, A part of the bolt member is arranged so that the tip ends thereof are directly above the insertion hole, and then only the part of the bolt member is lowered to insert the tip part thereof into the insertion hole and then return it vertically. Assembly method. 2. A bolt member assembling apparatus comprising a plurality of gripping members for detachably gripping each bolt member,
An apparatus for assembling a bolt member, wherein some of the grip members can move forward and backward relative to other grip members, and can swing about the tip of the bolt member to be gripped.