JPS6031632B2 - automatic stud implantation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The prior art automatic stud-clamping device fastens a set of gripping members to the stud, and then holds the stud in a workpiece with these gripping members firmly gripping the stud to prevent it from rotating. It was a complex device designed to be inserted.

Lynch, US Pat. No. 2,743,639, discloses a stud setter for automatically inserting studs.

The stud setter disclosed in the Lynch patent is extremely complex, consisting of a number of concentric cylinders, a number of metal balls in these cylinders, and a set of retainers located in the center of every cylinder. It is a very good device. Each metal ball in the same cylinder is located within a hole in one cylinder and slides into and out of a groove in the other cylinder and a groove in the gripping member. The various grooves in these cylinders and gripping members made the manufacture and assembly of the stud setter extremely difficult. The main object of the present invention is to provide an automatic stud ramming device that can be easily and quickly rough-edged with a small number of tools, that is easier to manufacture than conventional stud ramming devices, and that has a maximum outer diameter of An object of the present invention is to provide an automatic stud setting device for use in work areas that are smaller than the device and cannot utilize conventional larger automatic stud setting devices.

The automatic stud ramming device (hereinafter referred to as stud driver) of the present invention has a main body 1 as shown in FIGS. 1 to 3.
0, collar 20, driven head 30, carriage 40,
It includes two sets of balls (four holding balls 44 and two locking balls 46) in the carriage, a set of jaws 50 as gripping members, a plunger member 60 and a stud gripping alignment member 70. As shown in FIG. 2, which is a partially longitudinal side view of FIG. 1, and FIG. 3, which is an exploded perspective view of FIG. carriage 40 inside the body 10 and the driven head 30 also in the body 10.
have. Driven head 30 and carriage 40
is fixed to the inside of the main body 10 by a collar 20 that is screwed into the external thread of the main body 10. . The driven head 30 and the carriage 40 are connected to a head shelf 14 formed by the main body 101.
This prevents it from slipping off the main body 10 (see Fig. 4). Carriage shelf 14 is formed sufficiently low in body 10 to allow carriage 40 to move within a certain range between the bottom of driven head 30 and carriage shelf 14. During stud implantation work, the driven head 30 is attached to the drive means.

The drive means provides rotational and reciprocating motion to the stud driver. The driven head 30' is coupled to the four carriages so that power and motion from the driving means are transmitted to the four carriages, and the carriage 40 can slide on the main body 10. The four carriages are the mantle for the assembly of the jaws 50 as grippers.
The jaw 501 grips the stud by means of a threaded portion 54 that is threaded to engage with the thread of the stud. These jaws 50 are assembled around a plunger portion 60 to form a cylindrical shape and are held together by the hollow inner surface of the carriage 40. A hole is formed by threaded portion 54 in the bottom of the jaw assembly, through which the stud is inserted and gripped by the jaws. In the present invention, assembly and disassembly of the stud driver is greatly simplified by the novel body, carriage, jaws and stud grip alignment member.

The jaw 50 is held around the plunger section 60;
It is then inserted into the carriage 40. Next, the holding ball 44 and locking pawl 46 are placed in the holding ball hole 45 and locking ball hole 47 in the carriage 40. Before assembling the carriage 40 into the main body 10, the jaw 50
57 to align the locking pawl groove 58 with the locking pawl hole 47, or to define grooves 57 formed on the sides of the jaws 50 and defining diametrically opposed grooves between the two jaws 50. is aligned with the locking ball hole 47. This should create a recess for the locking balls 46 to escape as they slide over the inner surface 15 of the body 10, thus allowing the carriage 40 to slide into the body 10. No. After the carriage 40 is positioned in the body 10, the driven head 30 is slid into the body 10 and the short column 41 on the carriage 40 is slid into the groove 34 in the driven head 30.

The collar 20 is then slid onto the driven head 30 and screwed onto the body 10. And collection 8
0 (Fig. 1) by color 2 rivers and add cotton to make color 20.
Lock it against the main body, and the stud driver assembly is now complete. Collet 81 can be used to attach to accessory devices such as dust covers or travel gauges. In some cases, a stud gripping alignment member 70 may be slidably mounted on the end of the carriage 40, with the groove 71 in the stud gripping alignment member aligned with the locking screw hole 48 in the carriage 40, and the locking screw 7
8 is inserted into the carriage 40.

To disassemble the stud driver, the reverse procedure is used.

Take out the carriage 40 to the outside of the main body 10 and attach the jaw 50.
In order to remove it from the carriage 40, the jaws 50 must be closed, and for this purpose a stud must be inserted into the jaws 50'. What is necessary for assembling and disassembling the stud driver is a stud, and a set screw 7 when using the stud gripping alignment member 70 as necessary.
8, a collar 20, a set of wrenches for the collet 80 and the optional collet 81, and the driven head 30.

The advantage of the easy-to-assemble stud driver is that it saves time when handling the stud driver. In this stud driver, the member that grips and holds the stud is a jaw 50.

A semicircular groove 51 extending along the longitudinal direction of each jaw 50 is provided on the inner flat surface of each jaw 50 . A screw is provided at the bottom of this groove 51 so as to be screwed into the screw of the stud. Therefore, Joe 5
When the screw is closed against the stud, the serrated threaded portion 54 of the jaw 50 can grip the stud without damaging any of the stud's threads. A plunger member 60 is iron-fitted to the upper part of the groove 51 above the threaded portion 54.

This plunger member 60 is held in the groove 51 of the jaw 50 by a pivot cylinder 65. This rotating cylinder 6
5 is slidably attached to a screw shaft 661 of the plunger member 60. The rotating cylinder 65 is fitted into the rotating groove 55 of the jaw 50. This rotation groove 55 is a longitudinal groove 5
It is perpendicular to 1. The plunger member 60 pushes the lower portion of the jaw 50 outwardly so that the jaw 50 can slide into engagement with the stud. Joe 5
The jaws 50 are opened by the annular portion 62 of the plunger section 60 which is biased in the direction of the opening groove 53 of the groove 51 in the opening and away from the closing hole 52. Closed groove 52
is larger than the radius of the annular portion 62, so the annular portion 62
When the jaws 50 are in the closing groove 52, the jaws 50 can be closed, but since the annular portion 62 is biased against the opening groove 53 with a radius of 4 mm, the lower portions of the jaws 50 are close to each other. The push is done. By expanding the jaws 50, the engagement between the threaded portion 54 and the stud is released, thereby releasing the grip on the stud. The lower part of the annular portion 62 is tapered inward so that the annular portion 62 can smoothly move from the closed groove 52 to the open groove 53. The annular portion 62 and the entire lower half of the plunger portion 60 are biased downwardly into the opening groove 53 in the jaw 50 by a coil spring 64.

This coil spring 64 is configured to push up a rotary cylinder 65 that is movably attached to a screw shaft 66. The rotating sill 65 is prevented from slipping off the screw shaft 66 by the hexagonal head of the screw shaft 66. A bottom portion 63 of plunger member 60 extends into threaded portion 54 of jaw 50 . When the stud is inserted into the jaw 50,
The end of the stud pushes up the bottom 63 of the plunger member 60 and overcomes the biasing force of the spring to force the plunger member 60, including the annular portion 62, upwardly into the groove 51. The annular portion 62 slides into the closing groove 52 and allows the jaw 50 to be closed against the stud. The jaw 50 and plunger section 60 assembly is housed in the carriage 40. Carriage 40 is a hollow cylinder having a closed upper end 42 . Although the jaw-plunger assembly can be easily slid into the carriage 40, once inserted, the jaws 50 will not slide off on their own. Jaw 50 and carriage 40
There are three parts to prevent the carriage from slipping out.
Holding ball 44 on the circumference of 0, carriage 4 on the machine
Locking ball 46 and carriage 40 in the circumference of 0
locking groove 43 (FIG. 2) around the inner surface of. The lock groove 43 forms a circle around the inner surface of the carriage 40 at right angles to the direction of the carriage 40.
3 is a bridge 58A facing in the diametrical direction of the jaw 50;
The open jaw 50 is prevented from sliding out of the carriage 40 by acting as a stopper member against the jaw 50. When the carriage 40 is inside the main body 10, the holding ball 44 is held regardless of whether the jaw 50 is opened or closed.
This prevents the jaw 50 from coming out completely from the main body 10. The holding ball 44 is held in a holding ball hole 45 formed in the circumferential surface of the carriage 40.

The diameter of the holding ball 44 is greater than the thickness of the peripheral wall of the carriage 40. Therefore, if the carriage 40 is in the body 10 and the wall surface of the carriage 40 is on the inner surface 15 of the body 10.
When the holding ball 44 is aligned with the carriage 40
(Fig. 2). The jaws 50 that fit into the carriage 40 hold these holding balls 4.
4 are pressed against each other so as to take up the internal space of the carriage 40. The jaw assembly includes
Between the protruding holding balls 44, there is a portion formed thin enough to fit well, and this is the holding ball groove 56. The width of the holding ball groove 56 is such that the jaw 50 is
It is wide enough so that it can be moved up and down within a certain range. Within this range, Joe-5 River Bridge 58A
the carriage 4 until it engages with the groove 43 of the carriage 40.
It is possible to start sliding from 0, and jaw 50 can start sliding from jaw 5.
0 can be slid into the carriage 40 until the bottom of the 0 is approximately flush with the bottom of the carriage 40. The jaws 50 are also secured to the carriage 40 by locking balls 46.
is held inside.

The locking ball 46 is held in a locking ball hole 47 formed in the peripheral wall of the carriage 40. Like retaining ball 44, locking ball 46 has a diameter greater than the thickness of the peripheral wall of carriage 40. Therefore, the carriage 40 is
When the top part 42 of the carriage 40 abuts the bottom part of the driven head 30 and the locking ball hole 47 is brought close to and coincides with the inner surface 15 of the main body 10, the locking ball 46 slides upward into the carriage 40. It is pushed in beyond the inner surface of the peripheral wall of 40. Only the portion of the locking ball groove 58 can be in a state of iron engagement between these protruding locking balls 46. Due to the thickened portion directly above the locking ball groove 58, the locking pawl groove 58 cannot extend past the protruding locking pawl 46. Therefore, with the locking ball 46 pushed into the locking ball groove 58, the jaw 50 cannot slide out from the carriage 40. All of these measures prevent the jaws 50 from being completely ejected from the carriage 40, but allow the jaws 50 to move within the carriage 40 within a certain range.

This sliding movement in and out of the jaws 50 relative to the carriage 40' is the means by which the jaws 50 can be closed or opened. As shown in FIG. 2, when a portion of the jaw 50 slides out of the carriage 40, the jaw 50' is urged open by the plunger member 60. When the stud is inserted into the jaw 50, the stud pushes the jaw 50 up into the carriage 40 and engages the closing lip 59 of the jaw 50 with the tapered surface 49 of the carriage 40. closing lip 59 and tapered surface 4
As the jaws 50 slide upward into the carriage 40, the lower halves of the jaws 50 gradually approach each other until the jaws 50 are securely closed against the stud, thereby closing the closing lip 59. will no longer rise against the tapered surface 49. In this state, the jaws 50 are completely closed against the studs. Insertion of the stud into the jaws 50 also forces the carriage 40 upwardly through the body 10 and relative to the bottom of the driven head 30.

As the carriage slides up into the body 10, the locking ball hole 47 approaches the inner surface of the body 10, thereby causing the locking pawl 46 to protrude beyond the inner surface of the peripheral wall of the carriage 40 and into the locking pawl groove 58. . Because the locking ball groove 58 is traversed by the bridge 58A, the jaw 50 can only pivot in the carriage 40 to the point where the locking ball 46 abuts the side of the bridge 58A. Therefore, when the stud is rotated into the workpiece,
The stud does not allow the jaw 50 to be rotated within the carriage 40. Power and motion are provided by the driven head 30
is given to the stud driver through.

The driven head 30 is rotatably retained in the body 10 by the collar 20 engaging a lip 33 of the driven head. Driven head 30
A groove 34 is provided through the bottom of the drive head 30 at right angles to the axis of the driven head 30. This groove 34 is fitted to the short column 41 at the top of the carriage 40 so that it can slide but not rotate. The engagement between the groove 34 and the column 41 allows the carriage 40 to move up and down in the main body 10 while remaining rotatably coupled to the driven head 30. The upper end 3.1 of the driven head 30 is mounted to a suitable drive device, such as a drill press, which provides a reciprocating or rotational movement to the stud driver. Two collars hold the driven head 30 within the body 10.

The collar 20 is screwed onto the upper end of the main body 10. Color 2
0 engages the lip 33 and retaining surface 35 of the driven head 30. Engagement of the retaining surface 35 of the collar with a similar retaining surface on the inside of the collar holds the driven head 30 coaxially against the body 10'. Driven head 30
A flat surface 32 is cut into the upper cylindrical surface of the drive head 30 so that the driven head 30 can be fastened to the drive device using a wrench.

A similar flat surface is cut into the cylindrical outer surface of the collar 20 to similarly provide a grip for fastening the collar 20 to the body 10 with a wrench. The collet 80 is provided with a flat surface for pinching and is tightened to the collar 20 as a locking mechanism to prevent the collar 20 from loosening due to vibration during operation of the stud driver. An attached stud gripping alignment village 70 grips and holds the stud until it is inserted into the jaws 50.

This stud gripping and aligning member 70 is attached to the jaw of the stud.
Prior to insertion into the jaw 50, the stud is first aligned so that it assumes the same position as the jaw 50. The bottom of the stud gripping alignment member 70 is provided with an inverted table-shaped top 74, around the sides of which are arranged symmetrically four holes 75, each hole having a number of pins 73.
It holds - one by one. Each pin 73 is provided with a head 76 to prevent it from slipping out of the hole 75. The pin 73 is biased inwardly against the axis of the stud gripping alignment member 70 by a resilient O-ring 72 . Pin 73 engages the end of the stud and centers the stud in jaw 50 upon insertion of the stud into the stud driver. Since the pin 73 does not grip the stud tightly, the stud can pass through and rotate within the pin 73. The stud grip alignment member 70G has two setscrews 7 diametrically opposed to the carriage 40.
8 to the carriage 40, these set screws being iron-cast in corresponding holes 71 in the peripheral wall of the stud gripping alignment member 70. The set screw 78 is fixed in a set screw hole 48 provided in the carriage 40 and protrudes from the peripheral wall of the carriage 40. Set screw 78
is inserted into the carriage 40 after the stud gripping and aligning member 70 is stepped forward relative to the end of the carriage 40. This configuration of the hole 71 and set screw 78 allows the stud gripping alignment member 70' to move up and down a certain distance relative to the carriage 4M. In operation, the assembled stud driver is attached to the drive means by its driven head.

At the beginning of the series of operations (as shown in Figure 2),
The jaws 50 are open and slide down through the body 10 from the driven head 30 and partially protrude from the carriage 40 which is locked to the carriage shelf 14 in the body 10. If the stud driver is provided with an ancillary stud gripping and aligning member 70, the stud is first inserted into the stud driver by passing through this stud gripping and aligning member 70, which grips the stud so that the stud is Hold this until it is inserted into the jaws 50. Typically, the stud is retained in the stud gripping alignment member 70 until the stud is contacted with a threaded stud hole, at which time the stud gripping alignment member 7
0 holds the stud concentrically with the jaws 501 so that the stud is pushed up into the open jaws 50. As the stud is further inserted into the stud driver, the end of the stud rests against the bottom 63 of the plunger section 60. When the stud overcomes the biasing force of the coil spring 64, the annular portion 62 is pushed by the stud and moved upward from the open groove 53 of the jaw 50 to the closed groove 52. When the annular portion 62 of the plunger member 60 rises against the top of the closing groove 52 of the jaw 50, the upward movement of the stud causes the plunger member 60 to
and jaw 50 are pushed up into the carriage 40. As the jaw 60 moves upward in the carriage 40, the closing lip 59 of the jaw 50 closes in the carriage 4.
The threaded portion 54 of the jaw 50 is tightly closed against the stud. This upward movement of the stud also causes the carriage 40 to slide upwardly through the body 10 until its top 42 meets the bottom of the driven head 30, so that the locking ball hole 47 mates with the inner surface 15 of the body 10. Then, the locking ball 46 is projected beyond the inner surface of the peripheral wall of the carriage 40 into the locking groove 58 of the jaw 50. When the stud driver is started and first rotates the stud and lowers it into the workpiece, the stud resists being screwed into the workpiece and rotates within the threaded portion 54 of the jaw 50.
However, as the stud rotates within the threaded portion 54,
The stud is gradually screwed upward into the jaw 50 and finally rests against the bottom 63 of the plunger section 60. The bottom part 63 of the plunger has an annular part 62 closed to the groove 52.
Since it rests on the top of the jaw 50, it is prevented from rising further in the jaw 50. Once the stud rests against the bottom portion 63, the stud can no longer be pivoted up through the jaws 50. Therefore, at this point, the stud tries to rotate the jaw 50 inside the carriage 40, but in this case, since the locking groove 58 in which the locking ball 46 is present is crossed by the bridge 58A, the jaw 5 It can only rotate within a limited arc. stud jaw 50
Pivoting of the jaws 50 in the carriage 40 is prevented by the bottom 63 of the plunger and piston 5 of the jaw 50.
When stopped by the locking pole 46 supporting 8A,
The stud is rotated and lowered into the workpiece. When the stud is fully inserted into the workpiece, the stud driver gripping the stud is pulled up from the stud.

The stud now disengages the carriage 40 from the driven head 30 and lowers it into the body 10 such that the locking ball holes 47 in the carriage 40 abut the larger diameter inner surface 16 of the body 10 and the locking balls 46 Joe 50
and move it to the outside of the locking ball hole 47.
As the locking ball 46 emerges from the locking ball groove 58 and moves outwardly through the peripheral wall of the carriage 40, the jaw 50 is moved by the stud into the carriage until the closing lip 59 disengages the tapered surface 49 of the carriage 40. 40, and the plunger part 6 is now pulled out downward.
0 biases the jaws 50 open, disengaging the stud from engagement with the stud driver, thus completing the insertion of the stud into the workpiece. As described above, according to the present invention, since the second groove extending in the axial direction is formed by the notch formed on the side edge of each jaw, the locking ball can be used when assembling the device. By aligning the second groove, the locking ball protrudes into the second interior, and the outermost part of the locking ball in the folding direction is located within the wall of the carriage, so that even when the jaw is opened, the carriage is axially insertable into the main body;
Therefore, it has the unique advantage of being extremely easy to assemble compared to conventional devices in which the jaws must be closed during assembly. According to another feature of the invention, the invention further comprises a pair of locking surfaces integrally formed on the surface of the jaw and on the surface of the cavity of the carriage, the locking surfaces being integrally formed on the surface of the jaw and the surface of the carriage cavity, respectively, the locking surfaces being Since the holding means is provided to prevent the jaws from coming loose from the carriage by coming into contact with each other, compared to the conventional case in which a separately provided intermediate member is used to prevent the opened jaws from falling out from the carriage. This has the unique effect of reducing the overall size of the device, allowing it to be used even in narrow spaces where work could not be done conventionally.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the present invention, and FIG. 2 is a perspective view of an embodiment of the present invention.
3 is an exploded perspective view of the embodiment, FIG. 4 is a sectional view taken along line CC in FIG. 3, and FIG. 5 is a sectional view taken along line BB in FIG. 2. 10... Main body, 11, 13, 15...
Inner surface of main body, 12... Driven head shelf, 14
... Carriage shelf, 20 ... Color, 30
... Driven head, 40 ... Carriage, 43 ...
Lock groove, 45...Holding ball hole, 47...
... Locking ball hole, 50 ... Jaw, 51.
...Semicircular groove, 52...Closed groove, 53...
...Opening groove, 54...Threaded part, 57...
...notch, 58...locking ball groove, 58A...
... Fridge, 60 ... Plunger member, 70
...Grip alignment department. Figure 1 Figure 2 Figure 4 Figure 5 Figure 3

Claims (1)

[Claims] 1. A hollow cylinder having a longitudinal axis and having a stepped inner circumferential surface, the inner diameter of a first portion of the stepped inner circumferential surface being equal to the inner diameter of the stepped inner circumferential surface. a body larger than the inner diameter of the second part;
a driven head capable of rotating and reciprocating; comprising a peripheral wall, partially inserted into the interior of the main body and slidable and rotatable in the axial direction with respect to the main body; a rotationally driven cylindrical carriage; a plurality of jaws housed in the carriage and provided with stud gripping members, each having a cylindrical shape and having a diameter substantially the same as an inner diameter of a peripheral wall of the carriage; , each jyo is provided with a first groove oriented in a plane substantially perpendicular to the longitudinal axis of the body, the first groove of one jyo being in close proximity to the first groove of another jyo. opening/closing means for opening and closing the plurality of jaws relative to each other in relation to a stud; opening/closing means held in a peripheral wall of the carriage to connect the jaws to first and second inner peripheral surfaces of the main body; a plurality of locking balls that protrude from the inner surface of the peripheral wall of the carriage when contacting the second portion of the inner peripheral surface of the main body; A locking ball that, when aligned with a first groove of the jaw, closes the jaw and allows the carriage to slide in the axial direction in a range from a first portion to a second portion of the inner circumferential surface of the main body. an automatic stud implantation device comprising: a notch substantially parallel to the longitudinal axis of the main body in a side edge of each said jaw, the notch of one jaw being connected to the notch of the other jaw; A pair of opposing notches form an axially extending second groove for retaining one of the locking balls, and the dimensions and axial length of each notch are determined by the pair of notches. When one of the locking balls is located in the second groove, the outermost radial portion of the locking ball is located within the wall of the carriage, so that when the jaw is open, the carriage is an automatic device characterized in that it is configured to be able to be inserted into the main body in the axial direction and to be movable from a first portion to a second portion of the stepped inner circumferential surface of the main body. Stud implant device. 2 a hollow body; disposed within said body and having a longitudinal axis;
a carriage provided with a cavity extending along the longitudinal axis; a plurality of locking balls retained within a circumferential wall of the carriage; a plurality of locking balls partially inserted within the cavity of the carriage; a pair of opposing jaws rotatable about an axis and slidable along the axis, each of the jaws having a bridge against which one of the locking balls abuts; moving means for moving the pair of jaws around a pivot to position them in at least two positions, an open position and a closed position; moving means arranged to cause the bridges of the jaw to be spaced further apart from each other when in the open position than in the closed position; and a moving means provided on the jaw for non-rotatably gripping the stud when the jaw is in the closed position; gripping means for releasing the stud when in position;
preventive means for preventing movement of said jaw from an open position to a closed position unless a stud engages said gripping means; a pair of engagement integrally formed on a surface of said jaw and a surface of said carriage cavity; a retaining means comprising a stop surface for preventing the jaw from falling out of the carriage when the jaw is in an open position, the locking surface being located between the pivot and the gripping means; When the jaw is closed, the locking surfaces are released from each other and can be moved axially relative to each other, and when the jaw is opened, the locking surfaces abut each other and the jaw is opened. an automatic stud implanter comprising: a retaining means for preventing the stud from falling out of the carriage; and a carriage drive means for rotating the stud by rotating the carriage, thereby rotating the stud into the workpiece. 3. A locking ball groove is formed around the outer surface of each jaw and the locking ball groove is interrupted by the bridge, and the locking ball protruding partially into the cavity of the carriage is such that the locking ball groove is The jaw is arranged to protrude into the locking ball groove when taking a predetermined position with respect to the main body, so that when the locking ball protrudes into the locking ball groove, the jaw is moved against the carriage. and wherein rotation of the jaw relative to the carriage is prevented when the locking ball abuts the bridge, and the bridge constitutes one of the pair of locking surfaces. The automatic stud implantation device according to item 2. 4. The carriage has a plurality of holding ball holes passing through its peripheral wall, and the carriage has a holding ball groove, and a plurality of holding balls are positioned in the holding ball holes and partially protrude from the holding ball holes. 3. An automatic stud implanter according to claim 2, wherein the stud extends into a retaining ball groove, thereby retaining the jaw within the carriage even when the jaw is in the closed position. 5. A stud gripping and aligning means is mounted concentrically on the carriage, and the carriage has a plurality of circumferentially symmetrically arranged holes in its lower part, and the stud gripping and aligning means is mounted on the stud at its lower end. second gripping means coaxially and with play with said jaw; a peripheral wall overlapping said lower part of said carriage at a position above said second gripping means; and a hole in said lower part of said carriage. a plurality of slots extending longitudinally in said circumferential wall for alignment; and coupling means inserted through said slots into a hole in a lower portion of said carriage; 3. An automatic stud implanter according to claim 2, wherein said means is slidable relative to said connecting means.