WO2011145822A2

WO2011145822A2 - Shooting-type screw fastener

Info

Publication number: WO2011145822A2
Application number: PCT/KR2011/003345
Authority: WO
Inventors: 김건식; 김헌식
Original assignee: (주)엠티알
Priority date: 2010-05-19
Filing date: 2011-05-04
Publication date: 2011-11-24
Also published as: KR101117287B1; KR20110127430A; WO2011145822A3

Abstract

The present invention relates to a shooting-type screw fastener for fastening a screw, supplied through a tube-shaped shooting hose by means of external pressure, to an assembly structure using a power bit. The shooting-type screw fastener comprises: a bit through-hole defined so as extend from the rear end to the front end of the cylindrically-shaped body of the power bit, in order to enable the power bit to pass therethrough; a body constituted by a member having a shooting holder coupling hole defined therein, the shooting holder coupling hole being formed at an incline relative to the bit through-hole, from the outer periphery of the body to the bit through-hole, such that one end of the shooting holder coupling hole is in communication with the bit through-hole; a shooting holder, constituted by a cylindrical column-shaped member having a shooting holder hole defined in the center thereof, one end of which is connected to the shooting hose and the other end of which is coupled at a slant to the body; and a fastening head, constituted by a block-shaped member to which a screw grip portion disposed at the front end of the body is coupled, for fastening a screw supplied through the shooting holder using the power bit and advancing same, and then detaching the screw in a stationary state from the body, wherein the screw grip portion has a resiliently adjusted stepped configuration so as to be capable of holding a screw. The other end of the shooting holder is inserted in the shooting holder coupling hole to extend to a position beyond a centerline of the bit through-hole, and an anti-interference bit through-hole that is concentric to the bit through-hole is defined in the other end of the shooting holder in order to prevent interference with a power bit entering the bit through-hole (representative figure 4).

Description

Shooting Screw Fastening Device

The present invention relates to a shooting type screw fastening device, and more particularly, a screw supplied through a tubular shooting hose (2) to which the screw (1) is conveyed by external pressure is assembled using an electric bit (3). It relates to a shooter-type screw fastening device 500 to prevent the screw flipping of the supplied screw when fastening to the object (4).

In the case of screw fastening in the mass production line, a device that can be used only by hand, such as a driver or electric screw, has been used in the past, but automatic screw fastening device has recently been required for automation due to a sudden increase in labor costs and difficulty in managing personnel. As is known, research on the automatic screw fastening device is being actively conducted. As such, the introduction of automatic screw fastening devices in line with the automation trend of non-manual processes in mass production lines contributes to the reduction of labor costs and personnel management, increased productivity, and other reliability of precision work and production lines. .

1 is a partial cross-sectional view showing a conventional shooting type screw fastening device, Figure 2 is a cross-sectional view taken along line I-I of Figure 1, showing the other unit value of the conventional shooting holder.

The conventional shooter-type screw fastening device 50 is composed of a body 10, a shooting holder 20, the fastening head 30, as shown in FIG.

The body 10 has a cylindrical shape and includes a bit passing hole 12 and a shooting holder coupling hole 14.

The bit passage hole 12 is formed in the shape of the hole formed extending from the rear end to the front end of the body 10 so that the transmission bit 3 can pass through the body 10.

The shooting holder defect hole 14 is a hole formed in an inclined form with the bit passage hole 12 from the outer circumferential surface of the body 10 to the bit passage hole 12 so that one end thereof communicates with the bit passage hole 12. As a member of the shape, a thread for screwing is formed on the inner wall surface of the shooting holder coupling hole 14.

Shooting holder 20 is one end is connected to the shooting hose 2, the other end is coupled to the shooting holder coupling groove 14 in an inclined form, a cylinder with a hole-shaped shooting holder hole 22 is formed in the center As a member of the shape, the shooting hose 2 and the body 10 are connected to supply a screw 1 supplied to the shooting hose 2 into the body 10.

In addition, a thread is formed at the other end of the shooting holder 20 and is screwed to the shooting holder coupling hole 14.

Figure 3 is a perspective view showing a fastening head of a conventional shooting type screw fastening device.

The fastening head 30 is a block-shaped member coupled to the screw grip part 32 which is located at the front end of the body 10 and whose step is adjusted by elasticity to hold the screw 1. The screw grip part ( 32 includes a jaw (34) and a jaw coupling ring (36).

The jaws 34 are inserted into and coupled to the grooves formed at intervals of 180 degrees on the wall of the fastening head 30, and the front ends are stepped, and are integrally coupled to form one annular cross section.

The jaw coupling ring 36 is a ring-shaped member having elasticity to fix the jaws 34 coupled to both sides thereof integrally with the fastening head 30.

Looking at the state of assembling the screw (1) to the assembly object (4) in the state configured as described above, the screw (1) supplied to the shooting hose (2) of the body 10 through the shooting holder 20 It is supplied internally. The supplied screw 1 is caught in a short turn formed in the jaws 34 of the fastening head 30 to be in the air.

Then, the elevating and rotating means (not shown) are operated to advance the electric bit 3 while inserting the front end of the electric bit 3 into the head of the screw 1 and entering the electric bit 3. ), The jaws 34 formed on both sides of the fastening head 30 are opened to both sides with respect to the rotation shaft 38.

Then, the screw 1 is fastened to the assembly object 4 by rotating the rotational force to the elevating and rotating means by applying the screw 1 to the assembly object 4 to the electric drive bit 3.

However, the conventional shooting type screw fastening device 50 has the following problems.

First, as shown in FIGS. 1 and 2, the other end position P1 of the shooting holder is located outside the bit passing hole so as not to interfere with the bit passing hole 12. Therefore, as shown in FIG. 1, the screw inflow space S1 inside the body becomes large.

Here, the distance (L1) of the screw inlet space (S1) is 9mm 5mm and 8mm of the various screws of 5mm, 8mm, 14mm, 19.5mm supplied when the screw inlet space (S1) increases as described above There is a problem that the screw flipping phenomenon that the head of the heavy screw falls off first.

Second, the coupling between the body 10 and the shooting holder 20 is made of screw coupling.

In the case of the screw coupling as described above, due to the inclination of the screw thread, the center angle α formed by the center line of the bit through hole 12 and the shooting holder coupling hole 14 and the bit through hole 12 and the shooting holder coupling hole ( A case where the angle β between the shooting holder 20 coupled to 14 is made to shift is generated.

That is, when the shooting holder 20 is coupled to the shooting holder coupling hole 14, the shaft of the screw 1 supplied into the body 10 is also displaced.

Third, the jaws 34 formed on both sides of the fastening head 30 are separated and combined by 180 degrees in the transverse direction each time the screw 1 passes, thereby supporting the screws in two directions. However, in the case of two jaws 34, one jaw opens more than the same angle with respect to the rotation axis 38 when the screw 1 passes.

When the above problems occur, the central axis of the screw (1) is twisted and when combined with the screw hole of the assembly object (4) screw 1 is not fastened to the end, the resistance is generated, in the lifting and rotating means (not shown) Knowing that the fastening process of the screw 1 is finished, the electric bit 3 is stopped.

In this case, the defect rate of the product is increased.

Fourth, since the jaw coupling ring 36 coupled to the outer circumferential surface of the jaws 34 does not lie in a constant position and changes frequently, uniform elastic force is not provided to the two jaws 34 during the fastening process of the screw 1. Therefore, a problem occurs that the rotation angle of the jaws 34 is not the same, thereby causing a phenomenon that the shaft of the screw 1 is distorted.

Accordingly, the present invention has been made to solve the above problems, an object of the present invention is to reduce the size of the screw inlet space (S2) formed in the body 100 to prevent the flipping of the screw (1). In addition, by improving the coupling method of the shooting holder coupling hole 140 and the shooting holder 200 is to provide a shooting type screw fastening device 500 in which each center line is matched.

In addition, the jaws 340 of the fastening head 300 is separated and coupled by 120 degrees in the lateral direction, the shooting type screw fastening device 500 that can be stably opened to support the screw (1) To provide.

In order to solve the above-mentioned problems, the present invention, the screw supplied through the tubular shooting hose 2, the screw (1) is transferred by the external pressure to the assembly object (4) using the electric bit (3). In the shooter-type screw fastening device 500 to be fastened, as a cylindrical body 100, a hole-shaped bit passing hole extending from the rear end to the front end of the body 100 so that the electric bit 3 can pass through 120; And a shooting holder coupling formed in an inclined shape with the bit passing hole 120 from an outer circumferential surface of the body 100 to the bit passing hole 120 so that one end thereof communicates with the bit passing hole 120. A body 100 in which holes 140 are formed; A cylindrical member having a hole-shaped shooting holder hole 220 formed at the center thereof, one end of which is connected to the shooting hose 2 and the other of the shooting holder 200 coupled to the body 100 in an inclined form. ; And a block-shaped member coupled to the screw grip part 320 which is positioned at a front end of the body 100 and whose step is adjusted by elasticity to hold the screw 1. The screw 1 is supplied through the fastening head 300 is fastened and advanced and includes a fastening head 300 for detaching the screw 1 from the body 100 in a stopped state, the shooting holder The other end of the 200 is inserted into the shooting holder coupling hole 140 and extends to a position P2 passing through the center line of the bit passing hole 120, and the bit passing hole is formed at the other end of the shooting holder 200. In order to prevent interference with the electric bit 3 entering and exiting 120, an interference preventing bit passing hole 260 is formed to be concentric with the bit passing hole 120, thereby providing a screw to the shooting hose 2. (1) to the position where the center line of the bit passage hole 120 passes By supporting the guide on the section is characterized in that the screw flipping phenomenon of the screw (1) prevention.

In one embodiment, the body 100, the shooting holder 200 is the extension of the shooting holder hole 220 at the position of the other end of the shooting holder 200 when coupled to the body 100 A shooting holder fixing hole 160 formed to penetrate the body 100 in a direction perpendicular to a direction, and a position that interferes with the shooting holder fixing hole 160 on the outer circumferential surface of the other end of the shooting holder 200. After the annular fastening member seating groove 240 is formed, and the shooting holder 200 is inserted into the shooting holder coupling hole 140, the wedge-shaped fastening member 400 is the shooting holder fixing hole 160 And the fastening member seating recess 240 are inserted into the inserted state at the same time, thereby fixing the shooting holder 200 to the body 100 without being twisted.

In one embodiment, the screw grip 320 is a jaw (jaw, 340) having a front end stepped shape, integrally coupled to form an annular cross-section; And a ring-shaped member having elasticity, comprising a jaw coupling ring 360 for fixing the jaws 340 integrally on the outer circumferential surface thereof, wherein the jaws 340 are joined in three directions when integrally coupled. And first, second and

third jaws

340a, 340b and 340c, the first, second and

third jaws

340a, 340b and 340c transversely each time the screw 1 passes. It is characterized by supporting the screw 1 in three directions by being separated and joined by 120 degrees.

In one embodiment, the jaw 340 is characterized in that the ring fixing groove 350 is formed recessed on the outer surface of the jaw 340 so that the jaw coupling ring 360 can be easily coupled.

In one embodiment, a shooting holder guide groove 180 is formed on one side of the inner circumferential surface of the shooting holder coupling hole 140 in parallel with the central axis of the shooting holder coupling hole 140, and an outer circumferential surface of the shooting holder 200 is provided. By forming a shooting holder guide protrusion 280 at a position corresponding to the shooting holder guide groove 180 on one side, when the body 100 and the shooting holder 200 is coupled to the interference preventing bit passing hole 260 It is characterized in that the center of the bit passing through the hole 120 is prevented from being separated from the rotation.

According to the present invention, the screw 1 of the screw 1 is turned upside down by supporting and guiding the screw 1 supplied to the shooting hose 2 from the lower portion to the position P2 at which the center line of the bit passing hole 120 passes. The phenomenon can be prevented.

In addition, according to the present invention, it is possible to reduce the screw inlet space (S2) formed in the body 100 to prevent the screw (1) overturning phenomenon.

In addition, according to the present invention, when the body 100 and the shooting holder 200 is coupled, the center angle (α) formed by the center line of the bit passing hole 120 and the center line of the shooting holder coupling hole 140 and the The gap between the center line of the bit through hole 120 and the center line of the shooting holder 200 is matched to prevent play.

In addition, according to the present invention, since the position of the jaw coupling ring 360 is constant, a uniform elastic force is applied to the first, second and third jaws (340a, 340b, 340c), thereby, The screw 1 can be stably combined with the assembly 4 without twisting the shaft.

In addition, according to the present invention, the failure rate of the product is reduced, it is possible to shorten the working time, reduce labor costs and personnel management costs and increase the efficiency of productivity.

1 is a partial cross-sectional view showing a conventional shooting type screw fastening device.

FIG. 2 is a cross-sectional view taken along the line I-I of FIG. 1, showing the other end position of the conventional shooting holder.

Figure 4 is a partial cross-sectional view showing a shooting type screw fastening device according to the present invention.

5 is a cross-sectional view taken along the line II-II of Figure 4, showing the other end position of the shooting holder according to the present invention.

6 is a perspective view showing a fastening head of the shooting type screw fastening device according to the present invention.

Hereinafter, with reference to the accompanying drawings an embodiment of the present invention can be specifically realized the above object.

Figure 4 is a partial cross-sectional view showing a shooting type screw fastening apparatus according to the present invention, Figure 5 is a cross-sectional view taken along the line II-II of Figure 4, showing the other end position of the shooting holder according to the present invention.

Shooting type screw fastening device 500 of the present invention includes a body 100, the shooting holder 200, fastening head 300.

The body 100 has a cylindrical shape and includes a bit passing hole 120 and a shooting holder coupling hole 140.

The bit passage hole 120 is formed in the shape of a hole extending from the rear end to the front end of the body 100 so that the electric bit 3 can pass through the body 100.

The shooting holder coupling hole 140 is formed to be inclined with the bit passing hole 120 from the outer circumferential surface of the body 100 to the bit passing hole 120 so that one end thereof communicates with the bit passing hole 120. .

Here, the end of the shooting holder coupling hole 140 is formed to pass through the center line of the bit through hole 120 as shown in FIG.

This is to reduce the screw inlet space (S2) formed in the body 100.

That is, by forming the end of the shooting holder coupling hole 140 to pass through the center line of the bit through hole 120, the distance (L2) of the screw inlet space (S2) is reduced to 5mm or less.

Therefore, even if the screw 1 of various sizes is supplied, the overturning phenomenon of the screw 1 is prevented.

Shooting holder 200 is one end is connected to the shooting hose 2 and the other end is slidingly coupled with the shooting holder coupling hole 140 in the inclined form with the body 100, the hole-shaped shooting holder hole in the center As a cylindrical member having a 220 formed therein, the screw is connected to the shooting hose 2 and the body 100 and is supplied to the shooting hose 2 through the shooting holder hole 220 formed therein ( 1) is supplied into the body (100).

In addition, the other end of the shooting holder 200 is inserted into the shooting holder coupling hole 140 extends to a position (P2) to pass through the center line of the bit passing hole 120, the of the shooting holder 200 At the other end, an interference prevention bit passing hole 260 is formed.

The interference preventing bit passing hole 260 is formed to be concentric with the bit passing hole 120 in order to prevent interference with the electric bit 3 entering and exiting the bit passing hole 120.

This prevents screw flipping of the screw 1 by guiding the screw 1 supplied to the shooting hose 2 from the lower side up to a position P2 where the center line of the bit passage hole 120 passes. can do.

In addition, in the shooting type screw fastening device 500 of the present invention, the shooting holder fixing hole 160 and the fastening member seating groove 240 and the fastening member 400 to fix the shooting holder 200 to the body 100. ).

Shooting holder fixing hole 160 is a hole formed on one side of the body 100, the shooting holder 200 when the coupling is coupled to the body 100 in the position of the other end of the shooting holder 200 It is formed to penetrate the body 100 in a direction perpendicular to the extending direction of the shooting holder hole 220.

The fastening member seating recess 240 is formed in an annular shape at a position that interferes with the shooting holder fixing hole 160 on the outer circumferential surface of the other end of the shooting holder 200.

After the shooting holder 200 is inserted into the shooting holder coupling hole 140, the coupling member 400 is inserted through the shooting holder fixing hole 160 and the coupling member seating groove 240 simultaneously. As a wedge-shaped member formed to be inserted, the shooting holder 200 is fixed to the body 100 without being twisted.

When the body 100 and the shooting holder 200 are combined with the structure as described above, the center angle α and the bit passage formed by the center line of the bit passing hole 120 and the center line of the shooting holder coupling hole 140 are formed. The clearance between the center line of the hole 120 and the center line of the shooting holder 200 is identical to prevent play.

Meanwhile, a shooting holder guide groove 180 is formed on one inner circumferential surface of the shooting holder coupling hole 140 in parallel with a central axis of the shooting holder coupling hole 140, and on the outer circumferential surface of the shooting holder 200. The shooting holder guide protrusion 280 is further formed at a position corresponding to the shooting holder guide groove 180.

When the body 100 and the shooting holder 200 are coupled to each other, the shooting holder 200 is rotated with respect to the central axis of the shooting holder 200, thereby being coupled to the center of the interference preventing bit passing hole 260. This is to prevent the departure from the center of the bit passage hole 120.

The fastening head 300 is a block-shaped member coupled to the screw grip 320 which is positioned at the front end of the body 100 and whose step is adjusted by elasticity to hold the screw 1. The screw 1 supplied through the holder 200 is coupled to the electric bit 3 to be advanced and then detached from the body 100 in the stationary state.

The screw grip part 320 includes a jaw 340 and a jaw coupling ring 360.

The jaws 340 are inserted into the grooves formed at intervals of 120 degrees on the wall surface of the fastening head 200, the front end is stepped, and integrally combined to form one annular cross section.

In addition, the outer surface of the jaw 340 is formed with a ring fixing groove 350 recessed.

The jaws 340 are composed of first, second and

third jaws

340a, 340b and 340c which are coupled in three directions when integrally coupled, and the first, second and

third jaws

340a, 340b and 340c support the screw 1 in three directions by being separated and coupled by 120 degrees in the transverse direction about the rotating shaft 380 formed at the rear end each time the screw 1 passes.

Therefore, the screw 1 can be stably supported.

The jaw coupling ring 360 is a ring-shaped member having elasticity to be inserted into the ring fixing groove 350 and fixes the jaws 340 integrally to the outer circumferential surface of the fastening head 200.

As described above, the jaw coupling ring 360 is coupled to the ring fixing groove 350, whereby the position of the jaw coupling ring 360 is constant, thereby, uniform elastic force to the three jaws 340 This is provided.

Accordingly, when the screw 1 supplied through the shooting holder 200 is fastened by being fastened with the transmission bit 3 and then stopped, the screw 1 is separated from the body 100 and fastened to the assembly object 4. (1) It can be coupled stably without twisting the shaft, thereby increasing the efficiency of productivity by reducing the product failure rate and shortening the working time.

So far I looked at the center of the preferred embodiment for the present invention. Those skilled in the art will appreciate that the present invention can be implemented in a modified form without departing from the essential features of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope will be construed as being included in the present invention.

Description of the sign

1: Screw 2: Shooting Hose

3: Electric Bit 4: Assembly Object

10, 100: body 12, 120: bit through hole

14, 140: shooting holder coupling hole 20, 200: shooting holder

22, 220: shooting holder hole 30, 300: fastening head

32, 320: screw grip 34, 340: jaw

36, 360: jaw coupling ring 38, 380: rotation axis

50, 500: shooting type screw fastening device 160: shooting holder fixing hole

180: shooting holder guide groove 240: fastening member seating groove

260: anti-interference bit through hole 280: shooting holder guide projection

340a, 340b, 340c: first, second and third jaws

350: ring fixing groove 400: fastening member

P1, P2: other end position of shooting holder S1, S2: screw inlet space

L1, L2: distance of screw inlet space

Claims

The shooter-type screw fastening device 500 which fastens the screw supplied through the tubular shooting hose 2 through which the screw 1 is conveyed by external pressure to the assembly object 4 by using the electric bit 3. In

A cylindrical body (100), a hole-shaped bit passing hole 120 extending from the rear end to the front end of the body 100 so that the transmission bit (3) can pass; And a shooting holder coupling formed in an inclined shape with the bit passing hole 120 from an outer circumferential surface of the body 100 to the bit passing hole 120 so that one end thereof communicates with the bit passing hole 120. A body 100 in which holes 140 are formed;

A cylindrical member having a hole-shaped shooting holder hole 220 formed at the center thereof, one end of which is connected to the shooting hose 2 and the other of the shooting holder 200 coupled to the body 100 in an inclined form. ; And

Located in the front end of the body 100 is a block-shaped member coupled to the screw grip 320 is stepped by elastic to hold the screw (1), through the shooting holder 200 And a fastening head 300 for disengaging the screw 1 from the body 100 in a stationary state after the supplied screw 1 is fastened to the electric bit 3 and advanced.

The other end of the shooting holder 200 is inserted into the shooting holder coupling hole 140 and extends to a position (P2) passing through the center line of the bit passing hole 120,

The other end of the shooting holder 200 has an interference preventing bit passing hole 260 to be concentric with the bit passing hole 120 in order to prevent interference with the electric bit 3 entering and exiting the bit passing hole 120. Is formed, by supporting the screw (1) supplied to the shooting hose (2) from the lower portion to the position where the center line of the bit passing hole 120 passes to prevent the screw flipping of the screw (1) Shooting type screw fastening device.
The method of claim 1,

The body 100, in the direction perpendicular to the extending direction of the shooting holder hole 220 at the position of the other end of the shooting holder 200 when the shooting holder 200 is coupled to the body 100. Shooting holder fixing hole 160 formed to penetrate the body 100 is formed,

On the outer circumferential surface of the other end of the shooting holder 200, an annular fastening member seating groove 240 is formed at a position that interferes with the shooting holder fixing hole 160,

After the shooting holder 200 is inserted into the shooting holder coupling hole 140, the wedge-shaped fastening member 400 penetrates the shooting holder fixing hole 160 and the fastening member seating groove 240 simultaneously. By inserting in the inserted state, the shooting holder 200 is a shooting type screw fastening apparatus, characterized in that fixed to the body 100 in a non-twisted state.
The method of claim 1,

The screw grip 320 is

A jaw (340) having a stepped shape in front and coupled integrally to form one annular cross section; And

An elastic ring-shaped member, comprising a jaw coupling ring 360 for fixing the jaw 340 integrally on the outer peripheral surface,

The jaws 340 are composed of first, second and third jaws 340a, 340b, and 340c which are coupled in three directions when integrally coupled, and the first, second and third jaws 340a, 340b, 340c is a shooting type screw fastening device, characterized in that for supporting the screw (1) in three directions by being separated and coupled by 120 degrees in the transverse direction each time the screw (1) passes.
The method of claim 3, wherein the encounter 340,

Shooting type screw fastening device, characterized in that the ring fixing groove 350 is formed recessed on the outer surface of the jaw (340) so that the jaw coupling ring 360 can be easily coupled.
The method of claim 2,

A shooting holder guide groove 180 is formed on one side of the inner circumferential surface of the shooting holder coupling hole 140 in parallel with the central axis of the shooting holder coupling hole 140.

On one side of the outer circumferential surface of the shooting holder 200 by forming a shooting holder guide protrusion 280 in a position corresponding to the shooting holder guide groove 180, when the body 100 and the shooting holder 200 is coupled The shooting holder 200 is rotated with respect to the central axis of the shooting holder 200 is coupled to prevent the center of the interference preventing bit passing hole 260 is separated from the center of the bit passing hole 120 Shooting type screw fastening device.