JPS6159855B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic valve assembly jig for automatically assembling valves used in engines. There are various ways to improve the combustion characteristics of internal combustion engines, but for example, in the case of internal combustion engines that have a so-called jet valve mechanism installed above the main combustion chamber, it is necessary to form an air passageway that is separate from the normal intake passageway. The negative pressure in the main combustion chamber causes air to be sucked into the main combustion chamber from the air passage through the jet valve mechanism, thereby actively stirring the air-fuel mixture in the main combustion chamber. This increases the combustion speed under low load, and as a result, stable combustion characteristics can be obtained. This jet valve mechanism has a configuration as shown in FIG. That is, 1 is a main body of a jet valve, and a threaded portion 2 of the main body 1 is screwed into a cylinder head (not shown) in advance. 3 is a valve inserted into a valve hole 4 formed in the main body 1;
7 is a spring interposed between the retainer 6 and the main body 1; 7 is a kotsuta interposed between the retainer 6 and the upper end portion 3' of the valve; 8 is an air hole communicating with the air passage (not shown); 9 is an air chamber. To assemble the valve mechanism having the above configuration, the valve 3 is inserted into the valve hole 4 of the main body 1, the valve stem seal 10 is pushed from the valve upper end 3' above the nut part 1', and the spring 5 is fitted.
In this manner, the spring 5 is compressed by pushing the retainer 6 fitted with the retainer 7 downward from the upper end of the spring 5, and the valve 3 is set in the valve body 1. However, in consideration of maintaining airtightness between the valve 3 and the valve hole 4, there is almost no gap between them, so when assembling the valve 3 is inserted from the open end 11 at the bottom of the main body and inserted into the valve hole 4. When inserted, the upper end 3' of the valve comes into contact with the bottom 9' which is the step between the air chamber 9 and the valve hole 4.
It is extremely difficult to insert the hole manually by an operator, and this results in an increase in processing costs. In consideration of this, an apparatus for automatically assembling the above-mentioned jet valve has been invented, but in this invention, the valve stem seal 10 and the valve 3 are assembled into each other from both sides of the valve body 1, so the assembly jig for the valve body is used. Automatic assembly can be done efficiently by reversing the parts 180 degrees each time.

The present invention has been made in view of the above, and includes:
A conveyor plate is movably provided on the conveyor table via rolling rollers, and the valve body is attached to the conveyor plate so as to be rotatable around an axis substantially perpendicular to the surface of the conveyor plate, and is supplied from the valve body supply means. a rotating head member having a groove formed to hold a valve body that has been rotated; a rotating head member interposed between the rotating head member and the conveying plate; and positioning the rotating head member by rotating the rotating head member by a desired angle. a rotational positioning means formed to be able to rotate the rotational position; a reversing drive means for engaging the rotational head member to rotate the rotational head member about the axis; and a groove provided in the groove. The gist of this invention is an automatic valve assembly jig characterized by being equipped with a magnet that prevents the valve body held by the valve body from falling off. According to the present invention, a concave groove is formed in the rotary head member that is axially provided on the conveyor plate, and a magnet is provided in the concave groove, so that the valve body can be loosely inserted into the concave groove.
Even when the rotating head member is rotated, the valve body remains held in the recessed groove by the magnetic force of the magnet during assembly, which greatly reduces the manufacturing cost of the valve, unlike conventional valves that were manually completed. It has an excellent action and effect that can reduce the

Next, the present invention will be specifically explained based on the embodiments shown in FIGS. 2 to 6. FIG. 2 is a schematic plan view of an automatic jet valve assembly apparatus incorporating automatic valve assembly jigs 20 and 35 of this embodiment, which will be described later, as one component, and FIG. FIG. 4 is an enlarged perspective view of the main parts explaining the reversing mechanism of the assembly jig 20, and FIG. FIG. 6 is an enlarged external perspective view of the automatic valve insertion device in the step of inserting a valve, and an enlarged side view of the structure of the automatic valve insertion device. In addition, in the above-mentioned automatic assembly equipment described below, most of the constituent devices and members incorporated therein are automatically controlled by an air sequence circuit operated by air to perform each work process. A limit switch, which is known per se, is arranged at the location of the work process for transmitting an air signal to an air-operated device such as an air cylinder. When each assembly jig 20 is stopped at a predetermined process position by the brake motor 14, which is intermittently driven by an air signal, the limit switch attached to the assembly jig 20 is activated. operate the
Work in each process is automatically started by an air signal. In each drawing, the reference numeral 12 is a chain that is interposed between the driving sprocket 15 and the driven sprocket 16 on the brake motor 14 side and moves in the direction of arrow A, and the reference numeral 13 is the chain 1.
This conveyor jig is integrally attached to the sprocket 2 and has a large number of small plates 17 pivotally connected to each other so that the sprockets 15 and 16 can be bent. Rollers 19 (see FIG. 3) are pivotally supported on predetermined plates so that each of these plates 17 can move almost vertically on a horizontal conveyance platform 18 and support the plate. ing. 20 is a plate 1 having the same roller 19;
7 is a component of an automatic valve assembly jig, which is fixed with a screw 21, and a base 22 fixed with the screw 21, and a pin 23 connected to the base 22 and extending perpendicularly to the surface of the plate 17. 23 axis B
It has a U-shaped rotating head member 24 that is provided so as to be able to rotate about the head by 180 degrees with respect to the vertical direction. Between the rotary head member 24, which is one component of the automatic valve assembly jig, and the base 22, there is a rotary head member 24, which is a known means per se.
Rotary positioning means for determining the rotational position of the spring 25 and the ball are formed, for example, as best shown in FIG. Two cylindrical recesses 27 for accommodating the ball 26 are formed at both the upper and lower positions of the pin 23, so that the ball 26, which is biased by the spring force of the spring 25, is constantly pushed toward the base 22. There is. As a result, when each ball 26 fits into the recess 28 formed in the base 22, the U-shaped groove 29 of the rotating head member 24 is automatically positioned in the vertical direction. . In addition, 23' is a permanent magnet located coaxially with the pin 23 and buried in the deep part of the U-shaped groove 29, and the valve body 1 set in the rotating head member 24 is attached to the rotary head member 24. 24 is held so that it does not fall out of the recess 29 even if it is rotated. Next, 30 shown in FIG. 2 is a parts feeder for supplying the valve body 1 to the assembly jig 20, and a supply chute 31
A first shutter 32, a second shutter 33, and a slide feed section 34 are provided at the terminal ends of the main body 1, which are expanded and contracted by an air cylinder to control the flow of the main body 1. Then, the valve body 1 whose flow is stopped by the first shutter 32 is moved to the second valve body 1 which is in the contracted state.
The shutter 33 extends and inserts itself between the first and second main bodies 1 from the first shutter 32,
Next, the first shutter 32 is retracted. Further, by the pushing operation of the slide feeder 34, the first main body 1 is slid and fed toward the assembly jig 20 that is stopped at the end of the shooter 31, forming a U-shaped structure as shown in FIG. It is adapted to be automatically loosely fitted into the groove 29. The valve body 1 thus set flows in the direction of the arrow A, and the valve stem seal 10 is automatically attached to the valve stem seal 10 through steps C and D, which will not be described in detail. When you come to E, the assembly jig 20
is reversed 180 degrees by a reversing device 35, which is a reversing drive means, in order to temporarily insert the valve 3 in the subsequent step of step E into the air chamber 9 of the main body. This reversing device has a structure as shown in FIG. That is, 36 is a machine frame provided on a support stand (not shown);
7 is a sliding bed portion provided so as to be slidable in the direction of arrow F with respect to the machine frame 36 by an air cylinder 38; 39 is a rotating air cylinder provided upright at the front end of the bed portion 37; Reference numeral 40 designates a rotating head portion which is fixed to the rotating rod 39' of the air cylinder 39 and has a U-shaped hand portion 41. The rotating head member 24 is accommodated by the same hand portion 41, and then, by the operation of the rotating air cylinder 39, the hand portion 41
rotates 180 degrees, the rotating head member 24
3 around axis B. Even if the rotating head member 24 is reversed, the valve body 1 will not fall off from the rotating head member due to the magnetic force of the permanent magnet 23'. In this manner, when the reversing operation is completed, the sliding head portion 37 is retracted by the air cylinder 38. When step E is completed, the process moves to step G, which is provided with automatic valve supply means for temporarily inserting the valve 3 into the open end 11 of the inverted valve body 1. That is, 42 is a parts feeder for supplying valves using vibration, and 43 is a parts feeder for automatically dropping the valves 3 that have passed through a chute 44 into the valve body 1, as shown in FIG. This is a valve drop supply device that is temporarily inserted into the valve. In step G, the valve is temporarily inserted and the process moves to step H. In this step H, an automatic valve insertion device 45 is provided, whereby the valve is automatically inserted into the valve body 1. That is,
To explain in detail the automatic valve insertion device 45 shown in FIGS. 5 and 6, reference numeral 46 is a machine stand located near the conveying jig 13 that moves in the direction of the arrow, and 47 is on the machine stand 46. Machine frame planted in, 48
and 49 are an upper bracket and a lower bracket provided on the front surface 47' of the machine frame 47, and 50 is a pair of guide bars fixedly installed between the upper and lower brackets 48 and 49 along the vertical direction. 5
1 is a vertical sliding block that slides on the guide bar 50 via a bearing 52, and 53 is a bearing 54.
A vertical sliding block that slides on the guide bar 50 via the vertical sliding block 5.
A sliding table 55 is fixedly installed at 1 and 53. In this way, the sliding table 55 is attached to both the upper and lower brackets 48 and 49.
It is possible to move up and down along the guide bar 50 using the distance between them as the lift amount. 56, 57, 58 are sliding tables 55
It is a part of the board 55, and is fixed on the front of the board 55.
The guide bar 50 is connected to the middle and lower fixed blocks through bearings 59, 60, 61, respectively, between the fixed blocks 56, 57, 58.
A rotary shaft member 62 (hereinafter referred to as a spindle) that is disposed parallel to the rotary shaft member is slidable along the axis of the rotary shaft member, and in step G, the valve body 1 is
When the valve 3 supplied in step H comes to step H, the axes of the valve 3 and the spindle 62 in the vertical direction almost coincide with each other. Also, a motor 63 is installed between the middle and lower fixed blocks 57 and 58.
is set, and the drive torque of the motor 63 is set to the first
The signal is transmitted to the spindle 62 via a gear 64 and a second gear 65. A key 66 is interposed between the second gear 65 and the spindle 62 so as to transmit the torque.
Since the key 66 is fixed to the spindle 62 and fitted into a key groove 67 formed on the second gear 65 side, it will not be affected even if excessive force is applied upward from the insertion head 68, which is a part of the spindle 62. , attach the spindle to the upper fixing block 56 and the middle fixing block 5.
7 and can be slidably displaced. Note that, on the contrary, it goes without saying that the key 66 may be attached to the second gear 65 and the key groove may be formed on the spindle side. Reference numeral 69 is a compression spring interposed between the insertion head 68 and the lower fixing block 58, which always urges the head 68 downward. Reference numeral 70 is a split pin provided penetrating the upper end of the spindle 62 to prevent the spindle 62 from falling off. Further, 71 is a flat washer interposed between the split pin 70 and the upper fixing block 56 for protecting the split pin 70. Furthermore, 72 is a drive device (hereinafter referred to as an air cylinder) operated by fluid, electricity, etc. for vertical feeding provided above the front part 47' of the machine frame 47. A sliding table 55 connected to the sliding block 51 and having a spindle 62 and a motor 63 can be slid in the vertical direction along the guide bar 50. In addition, a silicone rubber 74 which is a known friction member is provided in the interior 75 of the insertion head 68 so as to obtain a strong force between it and the valve part 3'' of the valve 3.
The torque of No. 2 can be reliably transmitted to the valve No. 3 side. Since the above automatic valve insertion device 45 has the above configuration, it has the following effects.
That is, when the assembly jig 20 comes below the spindle 62 in step H, the valve 3 has its valve portion 3'' on the valve body 1 supported by the rotating head member 24, as shown in FIG. It is temporarily inserted upward into the air chamber 9 of the valve body, and the vertical axes of the valve and spindle are almost aligned as shown by the dashed line I.The torque of the motor 63 is transferred from the first gear 64 to the first gear. It is transmitted to the spindle 62 through the second gear 65, and the spindle 62 rotates.Then, the upper sliding block 51 is moved through the rod 73 by the operation of the air cylinder 72 for vertical feeding.
When pressed downward, the sliding table 55 moves against the guide bar 5.
0 along the downward displacement. Then, spindle 6
2 is displaced downward while rotating, and the insertion head portion 68
The silicone rubber 74 comes into contact with the valve portion 3'' of the valve, and the valve 3 is rotated by the spindle 62. Therefore, a centripetal action is generated on the valve itself,
The temporarily inserted valve is automatically inserted into the valve hole 4 from the upper end 3' of the tip with a constant pressure. When this insertion is completed, the slide table 55 is displaced upward by the operation of the air cylinder 72, thereby pulling the spindle 62 upward. In addition, in the unlikely event that the valve part 3'' of the valve does not fit into the interior 75 of the insertion head part 68 due to poor positioning, or if the valve hole 4 is small due to poor precision, the screw force of the spring 69 may be resisted. Therefore, the spindle 62 does not displace downward.In other words, the key 66 slides along the key groove 67, thereby preventing damage to the device 45.In the step H, the valve insertion work is performed. Once completed, the process moves to the next step J, in which another reversing device 76 having a mechanism similar to that installed in step E is provided, and by the same operation as the device 76, the main body 1 incorporating the valve is is again together with the rotating head member 24.
Rotate 180 degrees. At this time, the valve 3 is held by the frictional force of the valve stem seal 10, as shown in FIG. 1, and therefore does not fall from the main body 1.
The assembly jig 20 that has completed the above process J is further transferred to the subsequent process, and a detailed explanation thereof will be omitted.
In these post-processes, the spring 5 is fitted into the valve 3, and then, in a separate process, a retainer 6, in which the lock 7 has been installed in advance, is placed on the upper end of the spring 5, and further, in a post-process, the spring 5 is fitted into the valve 3 by a retainer press-fitting device. By pushing in the retainer 6 from above against the screw force, the jet valve assembly as shown in Fig. 1 can be completed, and step K
At this point, the completed body is automatically removed from the assembly jig 20. And assembly jig 2 after removal
0 moves about half a turn on the conveyor table 18 in that state, and when it reaches the position of the supply chute 31 again and stops, the same valve assembly work as described above is started.

As described above, according to the automatic valve assembly jig of this embodiment, the rotational positioning means 25 with respect to the base 22
A rotary head member 24 is provided so as to be able to rotate through the rotary head member 28, a permanent magnet 23' is attached to the member 24, and a reversing device 35 is provided for reversing the rotary head member 24 by 180 degrees. Valve body 1 loosely fitted into groove 29 of head member 24
Even if it is reversed by the reversing device 35 due to the attractive force of the permanent magnet 23', it will not fall out of the groove 29, and the valve can be assembled automatically. In the above embodiment, the roller 19 is the plate 1
7, but as shown in FIG.
A roller 19' may be pivotally attached to the lower part of the roller 19'.

In addition, the reference numeral 21' in FIG. 7 indicates the valve hole.
8' indicates a recess.

In the above embodiment, the case of automatic assembly of a so-called jet valve has been described, but it goes without saying that the present invention can also be applied to the assembly of other ordinary intake and exhaust valve mechanisms.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a completed assembly of a jet valve, FIG. 2 is a schematic plan view of an automatic assembly device including an embodiment of the present invention as one component, and FIG.
The figure is an external perspective view showing the relative positional relationship between the reversing device 35 and the assembly jig 20 in step E of FIG. 2, FIG. 4 is an enlarged perspective view of the main part of the assembly jig 20, and FIG. FIG. 6 is an enlarged side view of the automatic valve insertion device partially shown in cross section, and FIG. FIG. 7 is an external perspective view of a modification of the example. 1; Valve body, 3; Valve, 13; Conveying device, 20; Assembly jig, 24; Rotating head member, 2
5; Spring, 26; Ball, 27; Recess, 3
5, 76; Reversing device, 45; Automatic valve insertion device, 47; Machine frame, 50; Guide bar, 55; Sliding table, 62; Spindle, 68; Insertion head section, 6
9; Spring.

Claims (1)

[Claims] 1 A plate that is movable on a conveyance table via rolling rollers, is mounted on the conveyance plate so as to be rotatable around an axis that is approximately perpendicular to the surface of the conveyance plate, and is supplied from the valve body supply means. a rotating head member having a groove formed to hold a valve body that has been rotated; a rotating head member interposed between the rotating head member and the conveying plate; and positioning the rotating head member by rotating the rotating head member by a desired angle. a rotational positioning means formed to be able to rotate the rotational position; a reversing drive means for engaging the rotational head member to rotate the rotational head member about the axis; and a groove provided in the groove. An automatic valve assembly jig characterized in that it is equipped with a magnet that prevents a valve body loosely inserted into the valve body from falling out.