JPS6252212A - Bolt with collar and production unit thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) Does the present invention have a brim? In particular, the shaft body and the flange part are arranged and formed in a predetermined relationship, so that the shaft body and the flange part are arranged and formed in a predetermined relationship. related to the route and its manufacturing equipment.

(Prior art) Generally, a collar is eccentrically provided on the shaft body of a bolt, etc.
This collar is often used as a cam or the like. To form such an eccentric collar, the shaft body is held arbitrarily, and a punching tool placed a predetermined amount eccentrically from the axis of the shaft body is moved up and down to punch the collar. A manufacturing device designed for punching is used.

(The problem to be solved by the invention) However, in such conventional shaft bodies with flanges and manufacturing equipment, the mutual positional relationship between the nominal shaft diameter lines of the shaft body and the flanged portion is not established, and in particular, When using the collar as a cam,
There was a drawback that the amount of action of the cam relative to the rotation angle of the shaft body could not be accurately determined.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a bolt with a flange and an apparatus for manufacturing the same, in which the shaft body and the flange have a clear positional relationship, and the positional relationship can be obtained with high precision. .

(Means for Solving the Problems) In order to achieve the above object, in the flanged bolt according to the second invention, the flanged portion is provided with a predetermined eccentricity from the axis of the shaft body. The shaft diameter line of the flange portion is configured to form a predetermined angle with respect to the reference shaft diameter line of the shaft body.

Further, the apparatus for manufacturing a flanged bolt according to the second invention includes a holding means for holding the shaft body, and a reference +kl+radial line of the shaft body held by the holding means is oriented in a predetermined direction.
and a punching means that, guided by the positioning means, punches out the flange so that the axial diameter of the flange forms a predetermined angle with respect to the reference axial diameter of the shaft body. configured.

(Example) Embodiments of the present invention will be described in detail below with reference to the drawings.

FIGS. 1(a) and 1(b) show a first embodiment of the flanged bolt according to the present invention, and this flanged bolt acts as a cam at the boundary between the shaft portion 2 and the head portion 3. Go south on Tsubabe 1. The flange, or cam 1, has a disk shape, and its center 1a is offset from the axis 2a of the shaft 2 by a distance e relative to the axis 2a. Further, the eccentric direction thereof is aligned with the direction of a reference diagonal line 6 connecting two opposing apex portions of the head 3. That is, if the diagonal line 6 is the reference shaft diameter line of the shaft portion 2, the shaft diameter line of the cam 1 (the diameter ltM5 connecting the center 1a of the cam 1 and the shaft center line 2a of the shaft portion 2) is the reference shaft diameter line. &!
The entire cam 1 is provided eccentrically so as to coincide with 6 (so that the angle formed by the object line is 0°).

According to the cam-equipped bolt with such a configuration, 1.xp
Since the positional relationship with the silt cam is clearly defined, the amount of action of the cam 1 relative to the rotation angle of the bolt can be accurately grasped. In FIG. 1, reference numeral 7 designates a hexagonal recess for positioning, which is formed to resemble the outer shape of the head 3 for convenience in manufacturing the bolt, which will be described later.

Figure 2 values) to (c) show a second embodiment of the flanged bolt according to the present invention, and in this embodiment, an elliptical cam 1
1 at the boundary between the shaft portion 12 and the head portion 13. Shaft part 12
In the middle, there is a flat part 14 for attaching other parts.
The two flat portions 14 are located at the shaft portion 1.
20 is formed with substantially parallel notches on both sides. An axial diameter line (diameter line) 1 extending parallel to both flat parts 14
5 is the reference shaft radius line. On the other hand, the center 11 of the cam 11
a (the intersection of the long axis and the short axis) is eccentric by a certain distance e' from the axis 12a of the shaft portion 12, and the shaft diameter line 16 corresponding to the long axis is eccentric with respect to the reference shaft diameter line 15. They are arranged to form a predetermined angle θ.

In this embodiment as well, since the positional relationship between the bolt side and the cam is clear, it is possible to accurately control the cam 110 operating cover.

Further, FIGS. 3(a) to 3(C) show an arrangement in which a cam 11 is arranged in the position Rp)J similar to the embodiment shown in FIG. However, in this embodiment, the head 13 is provided with a hexagonal four part 20 whose diagonal line is the reference shaft diameter line 15 mentioned above, and the long axis diameter line 16 of the cam 11 is We are trying to determine the

In this way, alignment can be performed at the head 13 near the cam 11, which is convenient for manufacturing the cam 11.

Hereinafter, an embodiment of the apparatus for manufacturing the bolt shown in the first embodiment will be described.

First, FIGS. 4(a) to 4(c) show a preforming apparatus. FIG. 4(a) shows a blank 30 made of steel or the like.
A device is shown comprising a lower mold 31 that accommodates a blank 30, and an upper mold 33 equipped with a pin 32 that is pressed against a blank 30 in the axial direction with a predetermined pressure. The shaft portion 2 of the gelt is formed by this device. Next, the device shown in FIG. 4(b) is
The blank 30 on which the shaft portion 2 has been formed is held in a lower mold 41, and the basic shape of the gel head is formed by an upper mold 42. Furthermore, the equipment shown in FIG. 4(c)
It consists of a lower mold 51 that holds the V', j, blank 30, and an upper mold 53 that includes a head forming mold 52. The upper head forming mold 52 is used to form the hexagonal head 3 of the bolt and the cam (
Finally, a four-part forming bottle 54 is used which forms the basic shape of the collar part 1, and further forms a hexagonal recess 7 in the base part of the head part 3. The recess forming pin 54 is slid along the head forming mold 52 while maintaining a predetermined positional relationship, so that the hexagonal recess 7 is formed in a predetermined positional relationship with respect to the entire bolt. .

Bolts made with such a preforming device are cut into cam (flange) 1 with a punching die set shown in Figures 5 and 6.
The final formation of is performed.

As shown in FIGS. 5 and 6, the punching die set consists of a receiving die 61 that holds the entire bolt, and a punching die 62 that is provided with a cam cutting edge and reciprocated in the axial direction of the bolt. It has become.

The receiver type 61 includes a bolt insertion hole 63 into which a bolt is received, a knockout bin 64 provided below the bolt insertion hole 63 so as to be movable up and down, and a suppression bin that presses the knockout bin 64 from the side. 65.

The opening of the bolt insertion hole 63 is located at the cam (flange) 1.
It is formed on a pedestal 66 that receives the cover. - Furthermore, the suppression bin 65 is biased from behind by a spring 67 so as to apply a certain holding force against the sliding movement of the knockout bin 64.

Further, the punching die 62 includes a body housing 68, nine punching pieces 69 fixed to the body housing 68, and an insertion pin 71 provided to reciprocate in the axial direction of the body housing 68. We are prepared. The insertion bottle 71 has a cylinder hole 7 bored on the center axis of the body housing 68.
2, so that it can move freely back and forth. The axial center line of the insertion pin 71 is provided so as to coincide with the axial center line of the bolt insertion hole 63 of the receiver type 6, that is, the axial center line of the bolt.゛The insertion pin 71 has a hexagonal cross section, and its tip can fit into the hexagonal recess 7 provided in the head 13 of the bolt, making such fitting easy. In order to do this, the tip of the bottle 71 is tapered. Further, a spring 73 with a predetermined load is disposed behind the insertion bottle 71, and the spring 73 biases the insertion bottle 71 toward the melt. In addition, the above-mentioned insertion bin 7
1 is guided and slid through a hexagonal guide hole (described later) provided in the punching piece 69, so that it is always put in and taken out in the same state.

Next, the punching piece 69 has a circular plate-shaped pin guide 74.
and a punching tool 5 equipped with a cutting edge. As shown in FIGS. 7 and 8, a hexagonal guide hole 76 is formed through the pin guide 74.
The insertion bottle 71 is inserted into this guide hole 76 and guided. Further, the guide hole 76 is provided eccentrically by a predetermined distance from the axis in the direction of the diagonal line 77 thereof. Therefore, the entire pin guide 74 is aligned with the guide hole 7 relative to the axis of the main body housing 68.
It can be mounted eccentrically by e in the diagonal line 77 direction of 6. Furthermore, the punching die 75 has an annular cutting edge 78 at its tip, and the pin guide 74
is installed coaxially with the Therefore, the punching die 75 is arranged eccentrically by e in the diagonal direction of the insertion bin 71 with respect to the axis of the insertion bin 71.

A cam (
To punch out the cam (flange), first, the basic shape of the cam (flange) is formed concentrically with the shaft 2 using the preforming device described above. Next, the bolt is gripped with fingers (not shown) and pulled out from the preforming device, and the receiver is inserted into the bolt insertion hole 63 of the mold 61, as shown in FIG. Then, the punching die 62 is advanced toward the head 3 of the bolt, and the tip of the insertion pin 71 is fitted into the hexagonal recess 7 of the bolt. At this time, even if the position of the bolt head 3 is slightly shifted,
The bolt is accurately positioned with respect to the insertion pin 71 by fitting the tip of the insertion pin 71 into the hexagonal recess 7 of the bolt. After that, when the punching die 62 is further advanced, the entire 72 bolts are inserted into the gel insertion hole 63, and the entire 72 bolts are inserted into the gel insertion hole 63. The shaft end of the bolt is brought into contact with the knockout bin 64. In this state, the fingers are opened and retracted.

Then, when the punching die 62 is further advanced, the basic shape of the cam (the beveled part) of the bolt comes into contact with the pedestal 66, as shown in FIG. In this case, since the gel is inserted while receiving a predetermined insertion resistance from the knockout pin 64, the melt will not fall out of the insertion bottle 71 and become misaligned. Further, when the punching die 62 is advanced, the insertion bin 71 remains in that position and the punching piece 69
is advanced toward the gel, and the cam (flange portion) 1 is punched out by the cutting blade 78. At this time, the insertion bin 71
Since the punching piece 69 and the punching piece 69 have a predetermined eccentric relationship, the cam (flange portion) 1 can be punched out accurately relative to the bolt positioned by the insertion pin 71.

(Effects of the Invention) As described above, in the flanged bolt and its manufacturing apparatus according to the present invention, since the flanged portion is formed in a predetermined relationship with the shaft body, the flanged bolt with respect to the shaft body is The function of the flange can be always accurately grasped, and the flange can be formed in the correct position with high precision and at low cost.

[Brief explanation of the drawing]

FIGS. 1(a) and 1(b) are a front view and a side view of a first embodiment of the flanged bolt according to the present invention, and FIG. 2(a) is a front view and a side view of a first embodiment of the flanged bolt according to the present invention. (b) and (c) are Tsubai-Shi1 according to the present invention? Front, side, and rear views of the second embodiment of the root, FIGS. 3(a) and 3(fb). (e) is a flange 7j' according to the third embodiment of the present invention. Front view, side view, and rear view of the root, Figures 4(a) and (b)
, (c) is a longitudinal sectional view of the preforming device, FIGS. 5 and 6 are longitudinal sectional views showing the manufacturing device according to the present invention before and after punching, respectively, and FIG. 7 is a plan view of the guide plate. , FIG. 8 is a cross-sectional view taken along line X-X11 in FIG. 7. Explanation of symbols 1.11...Brim part (cam) 2,12...Shaft body (shaft part)5.16...Shaft diameter line 6,15...
Reference axis diameter line 61... A receiver as a holding means is a die 62... A punching die 71 is a punching means... An insertion bin is a positioning means Patent applicant Kazunobu Sera, agent of Todera Co., Ltd., patent attorney. -Yu゛ゝ, Figure 5 r/7/ Omiyo = Salmon Nogupu'' 1J Open'o62-b2 Do1do (l) Figure 6

Claims (1)

[Scope of Claims] 1) A bolt with a flange, which is formed integrally with the shaft body by having the flange portion adjacent to the bolt head offset by a predetermined amount from the axial center line of the shaft body, wherein the flange portion is formed integrally with the shaft body. A flanged bolt characterized in that the shaft diameter line of the bolt is provided so as to form a predetermined angle with respect to the reference shaft diameter line of the shaft body. 2) In an apparatus for manufacturing a bolt with a flange formed integrally with the shaft body by making the flange portion eccentric from the axis of the shaft body by a predetermined amount in close proximity to the bolt head, a holding means for holding the shaft body; , a positioning means for positioning the shaft body held by the holding means so that the reference axis diameter line of the shaft body is oriented in a predetermined direction; A manufacturing device for a bolt with a flange, comprising a punching means for punching out a flange part so as to form a predetermined angle with respect to a diameter line.