JPH106149A - Bolt guide jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To guide a bolt protruded on assembled parts into a bolt insertion hole provided in counterparts. SOLUTION: A bolt positioning hole 35 is formed in the mutual contact faces of a pair of guide plates 30, 30 approachable or separatable each other to be split in two around the contact faces and a guide face 36 tapered into a conical shape is formed in the opening edge on the upper side. The maximum diameter of the periphery of the guide face 36 is almost twice the diameter of a bolt hole 71. If an assembling bolt 51 provided on a body 50 is made to approach from upward the bolt positioning hole 35 which is being matched to a through-hole 71 in a mount member 70, the axial end of the bolt can be moved down along the gradient of the guide face 36 and guided to the bolt positioning hole 35 and the through-hole 71.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig used for assembling parts to be assembled by bolting.

[0002]

2. Description of the Related Art For example, there is an assembling work of a body frame and a body in an automobile body. Briefly describing this assembling operation, a mount portion 1 shown in FIG. 13 is arranged at a plurality of locations on the body frame side, and a bolt insertion hole 2 is formed in a vertical direction thereof. On the other hand, a bolt 3 is hung down on the body side as shown in the figure corresponding to the position of each bolt insertion hole 2, and a locking claw 4 is provided so as not to come off even if a force is applied in the axial direction. It has been kept out.

[0003] The body is lowered onto the body frame, and each bolt 3 is inserted into the corresponding bolt insertion hole 2. Thereafter, a washer and a nut are fastened to each bolt 3, and the body is fixed on the vehicle body frame, and the work is completed.

[0004]

In the above work,
Aligning the body so that the bolt 3 faces the bolt insertion hole 2 is a very difficult task. Therefore, as shown in FIG. 13, a tapered surface 2a is formed at the opening of the bolt insertion hole 2 so that the bolt 3 can be guided. However, when the tapered surface 2a is provided, the bolt 3
Since the surface receiving the tightening force is reduced, the strength is disadvantageous, and the portion of the body that supports the bolt 3 on the head (see the portion A in FIG. 14) may be deformed and the tightening of the bolt and nut may be loosened.

[0005] Providing the tapered surface 2a in the bolt insertion hole 2 increases the space in the height direction, so that the mounting portion 2 becomes large and the manufacturing time is increased. The present invention has been made in view of the above problems,
An object of the present invention is to provide a bolt guide jig that can simplify a structure of a bolt fastening portion by guiding a bolt protruding from an assembled component into a bolt insertion hole provided in the mating component.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a jig for guiding a bolt protruding from an assembly part into a bolt insertion hole provided in the part to be assembled. It has a plurality of guide members which can be approached / separated along a direction orthogonal to the bolt insertion direction, and in a state where these guide members are close to each other, a bolt which can be aligned with the bolt insertion hole between each guide member A feature is that a positioning hole is formed, and each guide member is provided with a tapered guide surface for guiding a bolt tip toward the bolt positioning hole.

[0007]

In the state where the guide members are brought close to each other and a bolt positioning hole is formed between these guide members, a bolt is inserted from above. Then, the tip of the bolt contacts the tapered surface of the guide member and is guided along the gradient into the bolt positioning hole. Since the bolt positioning hole is aligned with the bolt insertion hole of the mating component, the bolt enters the bolt insertion hole according to the insertion of the bolt. Then, the guide members are separated from each other to retract the bolt guide jig, and then, for example, the bolt is tightened by abutting the assembled component against the mating component, thereby completing the assembling operation.

As described above, the bolt can be easily positioned in the bolt insertion hole without providing the conventional tapered surface for guiding the bolt around the bolt insertion hole of the mating component. It is possible to have a simple structure.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

<First Embodiment> One embodiment of a bolt guiding jig according to the present invention will be described below with reference to FIGS. The bolt guide jig of the present embodiment, as shown in FIG. 1, connects a body 50 conveyed in a suspended state to a body frame 60 in an automobile assembly line.
Used in the operation of lowering up and then fixing by tightening bolts and nuts.

The body frame 60 is, as shown in FIG.
A plurality of cross members 6 between a pair of side frames 61
Two are spanned. Body mount brackets 63 are provided at four corners of the body frame 60. The body mount bracket 63 projects outward from the side surface of the side frame 61, and has a mount member 70 on its upper surface as shown in FIG. Further, a bolt hole 71 is formed in the vertical direction of the mount member 70. The mounting member 70 has a metal bush 7 forming the upper surface thereof and the inner peripheral surface of the bolt hole 71.
The elastic member 76 is sandwiched between the second member 2 and a cylindrical cover 75 constituting the outer peripheral surface of the mount member 70. In particular, the metal bush 72 has a structure different from that of the conventional metal bush, and has a structure in which the opening periphery of the bolt hole 71 does not have a tapered surface for guiding the bolt. That is, the metal bush 72 has a shape in which a flange portion 74 extends to the side of the opening at the upper side of the cylindrical portion 73 forming the bolt hole 71 so as to be orthogonal to the cylindrical portion 73.

On the other hand, assembling bolts 51 are suspended from the body 50 at a total of four locations at the front, rear, left and right corners corresponding to the bolt holes 71 of the body frame 60 described above. The bolt 51 is mounted in a bag-shaped structure provided in the body 50 (hereinafter, referred to as a “bag 50a”). Specifically, a bolt mounting hole 53 is provided on the bottom surface 52 of the bag portion 50a, and an opening (not shown) is provided on the upper surface. Bolts are inserted through the openings. Thus,
The bolt 51 is suspended and supported in a posture in which the screw portion is directed downward by engaging the head portion 51 a with the opening edge of the bolt mounting hole 53. However, FIG.
As shown in the figure, a hook-shaped locking claw 54 provided with a locking piece 51b and provided on the periphery of the opening of the bolt mounting hole 53 is provided.
, So that the bolt 51 does not come off when receiving a thrust force from below.

The bolt guide jig 10 has the following configuration for guiding the bolt 51 into the through hole 71 of the mount member 70. Jig for bolt guide 10
As shown in FIG. 5, a pair of connecting rods 11, 11 formed in a vertical U-shape face each other so as to be bilaterally symmetric on the same plane, and face each other. One end is rotatably connected to each other by a connecting pin 12, and a pair of slide frames 20, 2 respectively provided at the other end.
0 (see FIG. 6) can be abutted or separated. When the connecting rods 11, 11 are closed and the slide frames 20, 20 abut each other, the bolt guide jig 10 becomes rectangular, and the body mount bracket is provided inside the rectangle as shown by the two-dot chain line in FIG. 63 can be carried.

Each slide frame 20, as shown in FIG.
It is formed in a U-shape and attached to the end of the connecting rod 11 sideways. Each of the pair of rails 21 and 21 has a concave groove 21a on the inside of the opposite side.
And both sides of a guide plate 30 described later are slidably fitted in the respective recessed grooves 21a so as to bridge between the rails 21 and 21. And that rail 2
Connecting rod 1 is connected to the center of connecting portion 22 connecting
When the two connecting rods 11 are closed, the slide frames 20 are opposed to each other on a plane orthogonal to a rectangular surface formed by the connecting rods 11 to form a rectangular shape. . These guide plates 30, 30
As shown in FIGS. 6 and 7, the rectangular plate is provided with ridges 31, 31 on both side surfaces thereof so that the groove 21 of the rail 21, 21 is provided.
The slide arm 32 provided on the surface facing the connecting portion 22 is inserted into the cavity 11 a formed from the connecting portion 22 to the connecting rod 11. Then, for example, an external opening (not shown) is provided on the back side of the cavity 11a so that a driving force such as hydraulic pressure or air pressure can be supplied, and by switching this pressure between positive and negative, the guide plate 30 slides, When moving forward, the end faces of both guide plates 30, 30 abut.

A pair of pins 33, 33 are formed on both sides of the end surface of one of the guide plates 30 which are in contact with each other. It has become. The tips of the pair of pins 33, 33 are tapered, and when the two guide plates 30, 30 are abutted, they enter the recesses 34, 34 while centering with the tapered tapered surfaces. ,
Positioning of both guide plates 30, 30 is performed. Thus, a bolt positioning hole 35 described below is formed between the two guide plates 30.

The contact surfaces of the two guide plates 30, 30 are:
As shown in FIGS. 8 and 9, a bolt positioning hole 35 divided into two around the contact surface is formed. In FIG. 9, the upper opening edge of the bolt positioning hole 35 is tapered in a mortar shape. The guide surface 36 is formed. The maximum diameter of the periphery of the guide surface 36 is about twice the diameter of the bolt hole 71, and the bolt positioning hole 35 is aligned with the through hole 71 of the mount member 70, as shown in FIG. When the assembling bolt 51 provided on the body 50 is approached from above in the state, the shaft end of the bolt is moved downward along the slope of the guide surface 36, and the bolt positioning hole 35,
It can be guided to the through hole 71.

The jig 1 for guiding a bolt constructed as described above.
Numeral 0 is incorporated in a production facility of an automobile assembling line, is attached to, for example, a robot or the like, and is set at a predetermined position of the body frame 60 by unmanned operation. Hereinafter, the operation will be described. Body 50 to body frame 6
Before lowering to 0, the bolt guide jig 10 is set. First, the connecting rod 11 is rotated about the connecting pin 12 so that the tips are brought into contact with each other. Next, the slide arm 32 is driven so that the guide plates 30, 30 abut each other. As a result, a perfect circular bolt positioning hole 35 is formed between the guide plates 30. After that, the rectangular surface formed by the connecting rod 11 is made to face the side surface of the side frame 61 and approached to the vehicle body frame 60. As shown in FIG. 5, the bolt positioning is performed while the mount member 70 is positioned inside the rectangular shape. Hole 35 for mounting member 7
It is set so as to be aligned with the 0 through hole 71.

In this setting method, the connecting rod 11 is positioned below the body frame 60 with the connecting rod 11 opened, and then the connecting rod 11 is closed to mount the mounting member 7.
The guide plates 30, 30 may be brought into contact with each other on the upper surface.
With the bolt guide jig 10 set, the body 50 is hung above the body frame 60 so as to face the body frame 60, and is lowered straight down. Then, the bolts 51 provided at the four corners of the body 50 are
1 and approaches the guide plate 30 above the mounting member 70.

Assuming that the body 50 is correctly positioned, the bolt 51 passes through the bolt positioning hole 35 and its tip enters the through hole 71 of the mount member 70. On the other hand, when the positioning of the body 50 is not accurately performed, the following is performed.

That is, when the body 50 is lowered, the bolt 5
The front end of one abuts on the guide surface 36. Since the bolt 51 is retained by the locking claw 54, the body 50
Under its own weight, and is obliquely pressed against the tapered guide surface 36. Further, when the body 50 is lowered, the bolt 51 is guided into the bolt positioning hole 35 while the body 50 itself is positioned by a horizontal reaction force received from the guide surface 36 by the bolt 51, and the tip thereof is connected to the bolt hole 71. To enter.

When the tip end of the bolt is inserted as described above, as shown in FIG. 10, the slide arm 32 is retracted to separate the guide plates 30, 30, and
Subsequently, the connecting rod 11 is opened and the bolt guiding jig 10 is opened.
Evacuate. At this time, for example, if the connecting rod 11 is simply opened by rotating without the slide arm 32, the guide plates 30, 30 separate while drawing an arc. If the distance between the mount member 70 and the body 50 is small, the guide plates 30, 30 may abut on the body 50. However, in the configuration of the present embodiment, such a situation does not occur because the guide plates 30, 30 are moved in the horizontal direction and retracted.

After the bolt guide jig 10 is retracted,
When the body 50 is lowered to the end, the body 50 is mounted on the mount member 70 as shown in FIG. If the nut is tightened to the tip of the bolt 51 together with a washer or the like, the assembling work of the body 50 and the body frame 60 is completed. Conventionally, regarding the tightening of bolts and nuts, the through-hole of the mounting member has a tapered surface for guiding the bolt, so that the supporting surface of the bolt head in the body hits the upper surface of the mounting member, causing a failure. In this embodiment, the tapered surface for bolt guide is
Since the mount member 70 is provided on the bolt guide jig 10 and the mount member 70 side is formed flat, such a contact failure does not occur. Therefore, the reliability of the bolted portion can be improved. In addition, the fact that the mount member 70 is not provided with a tapered surface can reduce the height dimension of the mount member 70 by that much, and further facilitates the manufacture of the mount member 70, and It leads to cost reduction.

<Other Embodiments> The present invention is not limited to the above embodiments. For example, the following embodiments are also included in the technical scope of the present invention.
In addition to the following, various changes can be made without departing from the scope of the invention.

(1) In this embodiment, a bolt 51 is hung on an assembly part (body 50) suspended upward,
It is guided to the through hole 71 of the part (the body frame 60) that waits downward. For example, it is assembled when a bolt is provided on the lower side and the through hole is provided on the upper side, or the assembled part protrudes in the horizontal direction. Such a bolt guide jig may be used to guide the set bolt to the through hole formed in the same direction as the mating component.

(2) Bolt guiding jig 10 of the present embodiment
Is for positioning the bolt 51 in the through hole 71 having substantially the same diameter as that of the bolt 51. For example, the bolt 51 may be guided to a long hole. In this case, for example, FIG.
As shown in FIG. 6, a bolt positioning hole 82 having the same length as the long hole 80 is formed in the contact surface between the pair of guide plates 81, 81, and the guide is tapered so that the opening edge thereof is enlarged in the width direction. The surface 83 may be formed.

(3) In this embodiment, the bolt guide jig 10 is used to position the bolt in the bolt hole. However, for example, it may be used to guide a pin into the pin hole.

[Brief description of the drawings]

FIG. 1 is a side view showing a body frame and a body.

FIG. 2 is a plan view of a vehicle body frame.

FIG. 3 is a sectional view showing a bolt fastening portion between the body frame and the body.

FIG. 4 is a plan view showing a locked state of a bolt in a body.

FIG. 5 is a side view of the bolt guiding jig according to the embodiment.

FIG. 6 is a perspective view of the bolt guiding jig.

FIG. 7 is a perspective view showing a guide plate of the bolt guiding jig.

FIG. 8 is a plan view showing a guide plate.

FIG. 9 is a cross-sectional view showing a state where a bolt is guided by a guide surface.

FIG. 10 is a sectional view showing a state where the guide plate is retracted.

FIG. 11 is a cross-sectional view showing a state where a bolt is inserted into a through hole.

FIG. 12 is a perspective view showing a modification of the bolt guiding jig.

FIG. 13 is a sectional view showing a conventional bolt fastening portion.

FIG. 14 is a cross-sectional view showing a state in which a bolt is inserted into a through hole.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Jig for bolt guide 30 ... Guide plate (guide member) 35 ... Bolt positioning hole 36 ... Guide surface 50 ... Body (assembled part) 51 ... Bolt 60 ... Body frame (partner part) 71 ... Through hole (bolt hole)

Claims (1)

[Claims] 1. A jig for guiding a bolt protruding from an assembly part into a bolt insertion hole provided in the part to be assembled, the jig being capable of approaching / separating along a direction orthogonal to the bolt insertion direction. In the state where these guide members are close to each other, a bolt positioning hole that can be aligned with the bolt insertion hole is formed between the guide members, and each guide member has this bolt positioning hole. A bolt guide jig provided with a tapered guide surface for guiding a bolt tip toward a bolt positioning hole.