JPH09272017A - Nail forming method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continuously supply nails in a given posture to a groove forming machine to form a spiral groove in the axial part of a nail. SOLUTION: When a driving source M starts, the drive of the driving source M is transmitted to an input shaft S1 through a pulley 2, endless belt B1, pulley 1 and torque limiter T, starting the input shaft S1 to rotate. The rotation of the input shaft S1 is transmitted to the index cam of an index unit U and a pulley P3 for a timing belt. The shaft 7 connected to an output shaft S2 and the rotation side member 4 mounted on the shaft 7 are intermittently rotated receiving the rotation of the index cam. On the other hand, a supply member 17 moves toward the rotation side member 4 caused by the rotation transmitted to the pulley P3 for the timing belt, being projected in the side of the gap between respective guide rails 30, making the tip of the supply member 17 push out the axial part of a nail 10 to the position where the axial part of the nail 10 and the rotation side member 4 of a opening section 9 abut on each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for forming a groove in a shaft of a nail.

[0002]

2. Description of the Related Art Conventionally, in order to make it difficult to pull out a nail 10 driven into a wall or the like, a plurality of grooves 10b may be formed in a shaft portion 10a of the nail 10 as shown in FIG.
As a device for forming the groove on the shaft portion 10a of the nail 10 in this way, there is a device as shown in FIG. The forming apparatus of FIG. 5 has a pair of plate-shaped members 20 and 21 in which diagonal grooves 22 are formed on the surfaces facing each other.
0 is fixed, and the other plate-shaped member 21 moves in parallel with the plate-shaped member 20 (hereinafter, the plate-shaped member 20 having the groove 22 is fixed to the fixed-side groove forming member). 20, the plate-like member 21 is also referred to as the moving side groove forming member 21).

The moving side groove forming member 21 is used for the crank mechanism 2
The above-mentioned movement is carried out by 3.
When the nail 10 is supplied to the forming device of FIG. 5, the turntable 24 of the crank mechanism 23 rotates, and the moving-side groove forming member 21 connected to the turntable 24 via the shaft 25 approaches the turntable 24. When the moving speed of the moving-side groove forming member 21 becomes zero, the nail 10 is interposed between the moving-side groove forming member 21 and the fixed-side groove forming member 20.
Is supplied. At this time, there is a positional relationship in which the front end of the moving-side groove forming member 21 in the moving direction and one end of the fixed-side groove forming member 20 face each other, and the shaft portion 10a of the nail 10 has the axial direction of the moving-side groove forming member 21. The movable side groove forming member 21 is in contact with the surface on which the groove 22 is formed in a posture orthogonal to the moving direction.

When the moving side groove forming member 21 moves in the direction away from the turntable 24 by the operation of the crank mechanism 23, the shaft portion 10a of the nail 10 is pressed and sandwiched by the fixed side groove forming member 20 and the moving side groove forming member 21. It Shaft 1
When the moving side groove forming member 21 further moves while being pressed and clamped by 0a, the shaft portion 10a of the nail 10 is sent in the moving direction of the moving side groove forming member 21 while rotating. As a result, the shaft 10a of the nail 10 is formed with a plurality of grooves 10b.

By the operation of the crank mechanism 23, the moving side groove forming member 21 is located at the farthest position from the turntable 24, that is, the rear end of the moving side groove forming member 21 in the moving direction and the other end of the fixed side groove forming member 20. When the nails 10 move to the position where they face each other, the nail 10 is released from the pressing and holding by the fixed-side groove forming member 20 and the moving-side groove forming member 21, and is housed in a housing member (not shown). After that, the moving side groove forming member 2
1 reversely moves and returns to the original position.

[0006]

However, in the conventional forming apparatus, it is possible to produce only one nail 10 in which the groove 10b is formed by one reciprocating movement of the moving side groove forming member 21. Therefore, in the conventional forming apparatus, if it is attempted to increase the number of produced nails 10 per predetermined time,
The moving speed of the moving-side groove forming member 21 must be high. Moreover, in the conventional forming apparatus, the crank mechanism 23
Since the rotary motion of the rotary disk 24 is converted into the linear reciprocating motion of the moving-side groove forming member 21, there is a limit in increasing the moving speed of the moving-side groove forming member 21. Further, when the moving speed of the moving-side groove forming member 21 is increased, the moving-side groove forming member 2
The time taken to reverse 1 is shortened, and it becomes difficult to set the timing of supplying the nail 10 between the moving side groove forming member 21 and the fixed side groove forming member 20. When the moving-side groove forming member 21 is further increased in speed, the frictional heat between the shaft portion 10a of the nail 10 and the fixed-side groove forming member 20 and the moving-side groove forming member 21 increases, and the fixed-side groove forming member 20 and the moving-side groove forming member 21. There is a problem in that the groove 22 formed on the substrate is severely worn.

[0007]

In order to solve the above problems, the invention according to claim 1 presses and sandwiches the shaft portion of the nail by a pair of groove forming members provided with a plurality of grooves, Is a method of forming a groove in the shaft portion of a nail by relatively moving the groove forming member, wherein one groove forming member is intermittently rotated in one direction, and the one groove forming member is temporarily stopped. A nail is supplied between the groove forming members at a certain time, and when the one groove forming member is rotationally moved, a groove is formed in the shaft portion of the nail by each groove forming member. This claim 1
According to the invention, since the nail can be sequentially supplied between the pair of groove forming members in accordance with the stop timing of the one groove forming member that rotates intermittently, it is possible to simultaneously supply the nail between the pair of groove forming members. When forming grooves in the shaft portions of a plurality of nails, the nail shafts are not pressed and sandwiched by the pair of groove forming members in a state where the shaft portions are inclined.

According to the second aspect of the present invention, a pair of groove forming members for pressing and sandwiching the shaft portion of the nail with a surface on which a plurality of grooves are formed, and a nail supply for supplying the nail between the pair of groove forming members. A pair of groove forming members, wherein the groove is formed on a cylindrical curved surface, and a rotating side that intermittently rotates in one direction when forming a groove on a shaft of a nail. It is characterized in that it is configured by a member and a fixed-side member that is disposed in the vicinity of the rotation-side member and that has the groove formed on a curved surface facing the groove-forming surface of the rotation-side member. According to the invention of claim 2, the pair of groove forming members for pressing and sandwiching the shaft portion of the nail includes a rotating side member that intermittently rotates in one direction when the groove is formed on the shaft portion of the nail, and a rotating side. Since it is constituted by the fixed-side forming member that closely faces the member, it becomes easy to adjust the rotation speed of the rotating-side member when forming the groove in the shaft portion of the nail.

According to a third aspect of the present invention, in the nail supply device, the nail supply port is provided at a position close to the gap between the pair of groove forming members and facing the rotating side member. When the member is temporarily stopped, the nail is supplied from the supply port between the pair of groove forming members. According to the invention of claim 3, since the nail supply device supplies the nail when the rotation side member is temporarily stopped, the shaft portion of the supplied nail contacts the rotation side member and then It is possible to maintain a constant posture until it is caught in the gap between the groove forming members.

According to the invention of claim 4, in the vicinity of the supply port of the nail supply device, the nail is supplied to the gap between the pair of groove forming members at a cycle corresponding to the intermittent rotation of the rotary member. A member is provided, and the supply member and the rotation-side member are characterized by being connected by an intermittent indexing mechanism that operates by receiving a drive from a drive source. According to the invention of claim 4, since the rotation side member and the supply member operate by being driven by the same drive source, the supply member of the supply device supplies the nail to the gap between the pair of groove forming members. It becomes easy to control the timing when doing.

According to a fifth aspect of the invention, the rotary member is arranged so as to rotate intermittently in the horizontal direction, and the nail supply device supports the lower surface of the head of the nail on both sides of the shaft of the nail. A guide rail for supplying the nail to the gap between the pair of groove forming members in a state where the nail is suspended is provided. According to the invention of claim 5, in a state where the axial direction of the rotary side member and the axial direction of the shaft portion of the nail are parallel to each other, the shaft portion of the nail is pressed and sandwiched by the pair of groove forming members, The shank can be grooved.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. 1 is a plan view showing the outline of the nail forming apparatus of the present invention, and FIG. 2 is a side view of FIG. The nail forming device 1 is
A groove forming device 2 for forming a groove 10b on the shaft portion 10a of the nail 10 and a nail supply device 3 for supplying the nail 10 to the groove forming device 2 are provided. The groove forming device 2 has a cylindrical rotating member 4 having a plurality of grooves formed on the outer peripheral surface (hereinafter, the grooved surface is referred to as a groove forming surface 4a), and an outer peripheral surface of the rotating member 4. And a fixed-side member 6 in which a groove is carved on a curved surface (hereinafter, a surface on which the groove is carved) is described as a groove forming surface 6a. The pitch of the grooves formed on the groove forming surface 4a and the pitch of the grooves formed on the groove forming surface 6a are the same.

The rotary member 4 is fixed to one end of a shaft 7, and the other end of the shaft 7 is attached to an index unit U described later. On the other hand, the fixed-side member 6 is attached to the adjusting device 8 for adjusting the position of the fixed-side member 6 itself with respect to the rotating-side member 4, and the adjusting device 8 is attached to the machine base F of the groove forming device 2. ing. When changing the number of the grooves 10b formed in the shaft portion 10a of the nail 10, the adjustment device 8 moves the fixed-side member 6 in the circumferential direction of the rotation-side member 4, and the grooves when the rotation-side member 4 is stopped. The relative position of the groove of the forming surface 4a and the groove of the groove forming surface 6a of the fixed side member 6 is changed. Then, the fixing side member 6 is moved in the radial direction of the rotating side member 4 by the adjusting device 8 to change the interval between the rotating side member 4 and the fixed side member 6, and the groove formed in the shaft portion 10a of the nail 10. Adjust so that the shape of 10b is uniform.

The groove 10b of the shaft portion 10a of the nail 10 is formed at the close facing portion between the rotary side member 4 and the fixed side member 6 (hereinafter, the close facing portion between the rotary side member 4 and the fixed side member 6 will be referred to as "close facing face portion"). The groove forming portion 13). In the groove forming portion 13, the nail 10 is supplied from the opening 9 between the rotary side member 4 and the fixed side member 6 on the upstream side in the rotation direction of the rotary side member 4.

The nail supply device 3 includes a nail 10 up to the vicinity of the opening 9.
And a push-out device 12 having a supply member 17 for supplying the nail 10 transported by the transport device 11 to the opening 9. The front end of the transfer device 11 on the fixed member 6 side is in contact with the fixed member 6. still,
A driven roller 14 is provided at a position facing the fixed side member 6 via the rotation side member 4, and when the shaft portion 10a of the nail 10 is supplied to the groove forming portion 13, the rotation center position of the rotation side member 4 is provided. The eccentricity may be prevented. Further, at this time, the driven roller 14 may be rotatably attached to the bracket 15, and the adjustment screw 16 may press the bracket 15 to adjust the contact pressure of the driven roller 14 with respect to the rotation-side member 4.

The index unit U is a unit for outputting continuous rotation input from the input shaft S1 as intermittent rotation from the output shaft S2. The index unit U includes an input shaft S1 that receives the rotation of the drive source M.
An index cam C fixed to the input shaft S1, a cam follower C2 that meshes with the index cam C1, and an output shaft S2 located at the center of rotation of the disk member to which the cam follower C2 is attached. The output shaft S2 is connected to the shaft 7 of the rotation-side member 4.

The index cam C1 has a cylindrical cam body 26 with a plurality of cam grooves formed therein. These cam grooves include a spiral groove 26a (see FIG. 3A) and each spiral groove 26a.
and a parallel groove 26b (see FIG. 3 (b)) which is continuous with a and is provided along the circumferential direction of the cam body 26. The cam followers C2 are provided on the outer peripheral surface of the disc member 27, and are arranged radially from the center of the disc member 27.

A torque limiter T is provided at the tip of the input shaft S1 on the side of the drive source M, and a pulley P1 is integrally attached to the tip of the torque limiter T. Further, an endless belt B1 is hung between the pulley P1 and the pulley P2 attached to the drive shaft of the drive source M. On the other hand, a timing belt pulley P3 is attached to the rear end of the input shaft S1, and the timing belt pulley P3 and the timing belt pulley P provided in the pushing device 12 for operating the supply member 16 are provided.
A timing belt B2 is hung between the belt 4 and the belt 4.

The timing belt pulley P4 is attached to one end of the shaft 18 and
An end cam C3 is attached to the other end of the. The supply member 17 is provided with a cam follower C4, and the cam follower C4 is in contact with the cam surface of the end cam C3. Further, the supply member 17 urges the supply member 17 by the spring member 19 in a direction in which the cam follower C4 and the cam surface of the end cam C3 come into contact with each other.

The conveying device 3 is provided with a pair of guide rails 30 which are inclined downward from a nail supply portion (not shown) toward the opening 9, and a nail to be conveyed is provided in a gap between the pair of guide rails 30. The shaft portion 10a of 10 is inserted. The nail 10 supplied from a nail supply unit (not shown) is conveyed along the guide rail 30 to the vicinity of the opening 9. The guide rail 30 includes a shaft 10a on the lower surface of the head 10c of the nail 10.
Are supported on both sides of the nail, and the nail 10 is conveyed along the guide rail 30 by vibrating the guide rail 10 lightly.

Further, each guide rail 30 is provided in the conveying device 3 in a state of being divided into a plurality, and a gap 30a is provided in each divided portion. The guide rail 30 has a structure that is movable along the nail conveying direction for each divided rail so that the width of the gap 30a can be adjusted. By changing the kind of the nail 10 supplied by using the guide rail 30 having such a structure,
Alternatively, when the number of the grooves 10b formed in the shaft portion 10a of the nail 10 is changed, even if the position of the fixed side member 6 is changed by the adjusting device 8, by adjusting a part of the guide rail 30, the guide rail 30 can be adjusted. The tip end of the nail 30 can be moved to an appropriate position, and the shaft portion 10a of the nail 10 is not clogged between the tip end of the guide rail 30 and the opening 9.

The direction in which the gap 30a is provided is inclined toward the direction in which the nail 10 moves so that the nail does not fit into the gap 30a. Further the gap 30a
The width at the maximum opening is made smaller than the diameter of the shaft portion 10a of the nail 10.

Next, the nail 1 is fed from the nail supply device 3 to the groove forming device 2.
The procedure for supplying 0 will be described. When the drive source M starts driving, the drive of the drive source is transmitted to the input shaft S1 via the pulley P2, the endless belt B1, the pulley P1 and the torque limiter T, and the input shaft S1 starts rotating. The rotation of the input shaft S1 is transmitted to the index cam C1 and the timing belt pulley P3.

When the index cam C1 rotates and the cam follower C2 and the spiral groove 26a mesh with each other, the spiral groove 26a.
The cam follower C2 moves in the axial direction of the input shaft S1 along with, and the disk member 27 rotates in the direction of the arrow in FIG. Next, when the cam follower C2 is engaged with the parallel groove 26b, even if the index cam C1 rotates, the cam follower C2 does not move in the axial direction of the input shaft S1, so that the rotation of the disk member 27 is temporarily stopped. Stop. After that, when the cam follower C2 and the spiral groove 26a mesh again, the cam follower C2 moves along the spiral groove 26a.
3, the disk member 27 rotates again in the direction of the arrow in FIG.

As described above, in response to the rotation of the index cam C1, the disc member 27 intermittently performs the rotational movement, and as a result, the shaft 7 connected to the output shaft S2 and the rotation attached to the shaft 7. The side member 4 rotates intermittently. On the other hand, the rotation transmitted to the timing belt pulley P3 is applied to the timing belt B2 and the shaft 1.
8 is transmitted to the end cam C3.

When the rotation is transmitted to the end cam C3, the cam follower C4 is moved by being pushed by the cam surface of the end cam C3, and the supply member 17 first moves in a direction away from the rotation side member 4. Then, when the end cam C3 further rotates and the pressing of the cam follower C4 by the cam surface of the end cam C3 ends, the supply member 17 is then pressed by the spring member 19 and moves again in the direction of approaching the rotation side member 4. To do. In the end cam C3, the timing at which the supply member 17 moves in the direction away from the rotation side member 4 coincides with the timing at which the rotation side member 4 stops, and the supply member 17 is pressed by the spring member 19 so that the supply member 17 rotates. 4 is attached to the shaft 18 so that the timing of movement in the direction approaching 4 and the timing of rotation of the rotation-side member 4 coincide with each other.

As described above, the nail 10 is sequentially supplied from the nail supply portion (not shown) to the gaps between the guide rails 30 while the rotary side member 4 and the supply member 17 are in operation, and the supplied nail 10 is supplied. Is transported to the vicinity of the opening 9 along the guide rail 30. Along the guide rail 30,
The shaft portion 10a of the nail 10 conveyed to the vicinity of the opening 9 moves in a direction in which the rotation side member 4 approaches and moves toward the guide rails 3.
The abutment member 17 protruding toward the gap side between the
0 is once stopped.

After stopping the nail 10 once, the supply member 17 moves in a direction away from the rotary member 4 and withdraws from the gap side between the guide rails 30. by this,
The nail 10 stopped by the supply member 17 is released from the supply member 17 and moves to the opening 9 side.
Then, the supply member 17 again moves in the direction in which the supply member 17 approaches the rotation-side member 4 and projects toward the gap between the guide rails 30, and the tip of the supply member 17 causes the shaft 10 of the nail 10 and the opening 9 to move. The shaft portion 1 of the nail 10 up to the position where the rotating side member 4 contacts
Push out 0a.

At this time, since the nail 10 is conveyed while being suspended by the guide rail 30, the shaft portion 10a of the pushed-out nail 10 has the axial direction of the shaft portion 10a in the axial direction of the rotary member 4. It comes into contact with the rotation-side member 4 in a state in which it is parallel to. Further, at this time, the supply member 17 prevents the nails 10 in the order next to the pushed-out nail 10 from being supplied to the opening 9.

The rotating side member 4 of the opening 9 and the shaft portion 1 of the nail 10
0a comes into contact with the rotary member 4, the shaft member 10a of the nail 10 is sandwiched between the rotary member 4 and the stationary member 6. The sandwiched nail 10 moves in the groove forming portion 13 while rotating itself in the axial direction as the rotation-side member 4 rotates. A plurality of spiral grooves 1 are formed on the outer circumference of the shaft portion 10a pressed by the groove forming surface 4a and the groove forming surface 6a.
0b is formed.

After that, when the rotation side member 4 rotates by a predetermined amount and stops, the nail 10 has the groove forming surface 4a and the groove forming surface 6a.
The nails 10 which are held in a state of being pressed by the next and are sequentially provided are supplied to the opening 9 by the same operation as described above. In the same manner, a plurality of nails 10 are simultaneously sandwiched in the groove forming portion 13 at a predetermined interval, and the shaft portion 10a of each nail 10 has a groove 10b in order.
Is formed. Then, the nail 10 that has moved in the groove forming portion 13 due to the intermittent rotation of the rotation-side member 4 sequentially starts from the opening between the rotation-side member 4 and the fixed-side member 6 on the downstream side in the rotation direction of the rotation-side member 4. Is discharged. The discharged nail 10 is received in a container (not shown).

[0032]

As described above, according to the present invention, the groove is formed in the cylindrical curved surface, and the rotary side member is intermittently rotated in one direction when the groove is formed in the shaft of the nail. The shaft portion of the nail is pressed and sandwiched by the fixed member that is arranged close to the rotation side member and has the groove formed on the curved surface facing the groove formation surface of the rotation side member, and the groove is formed on the shaft portion of the nail. At this time, by intermittently rotating the rotating side member in one direction, the rotating side member and the fixed side member do not press and pinch the nail in a tilted state. Therefore, when the rotating member is intermittently rotated to form a groove in the shaft portion of the nail, defective products such as a nail with a bent shaft portion or a nail with a broken shaft portion will not be produced.

Further, since a plurality of nails can be pressed and sandwiched between the rotating side member and the fixed side member to form a groove in the shaft portion of the nail at the same time, the shaft portion of the nail and the rotating side member can be formed. Of the nail in which the groove is formed in the shaft portion even when the rotating-side member is intermittently rotated at a rotation speed such that frictional heat generated between the shaft portion of the nail and the fixed-side member is suppressed. The number of products produced per predetermined time does not decrease significantly. Further, since the rotating side member is intermittently rotated in the range where the frictional heat is suppressed as described above, it is necessary to forcibly cool the shaft portion of the nail during the groove formation, the rotating side member, and the fixed side member. There is no need to install a device.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a nail forming device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a configuration of a rotating side member and a nail supply member.

FIG. 3 is a plan view of an index unit.

FIG. 4 is a plan view of a nail in which a groove is formed on a shaft portion.

FIG. 5 is a perspective view showing a schematic configuration of a conventional nail forming apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Nail forming device 3 Nail supply device 4 Rotation side member 5 Groove 6 Fixed side member 17 Supply member 30 Guide rail U Index unit (intermittent indexing mechanism)

Claims (5)

[Claims] 1. A method for forming a groove in a shaft portion of a nail by pressing and sandwiching a shaft portion of a nail by a pair of groove forming members provided with a plurality of grooves and by relatively moving the pair of groove forming members. And one of the groove forming members is intermittently rotated in one direction,
A nail is supplied between the groove forming members when the one groove forming member is in a temporary stop state, and a groove is formed in the shaft portion of the nail by each groove forming member when the one groove forming member rotates and moves. A method of forming a nail characterized by: 2. A nail formation comprising a pair of groove forming members for pressing and sandwiching a shaft of a nail with a surface on which a plurality of grooves are formed, and a nail supply device for supplying the nail between the pair of groove forming members. In the device, the pair of groove forming members include a rotating side member, in which the groove is formed on a cylindrical curved surface, and which intermittently rotates in one direction when the groove is attached to the shaft portion of the nail, and the rotating side member. And a fixed-side member having a groove formed on the curved surface of the rotary-side member facing the groove-formed surface of the rotary-side member. 3. A nail supply device, wherein a nail supply port is provided at a position close to a gap between the pair of groove forming members and facing the rotating side groove forming member, and when the rotating side groove forming member is temporarily stopped. The nail forming apparatus according to claim 2, wherein the nail is supplied from the supply port between the pair of groove forming members. 4. A supply member is provided near the supply port of the nail supply device for supplying the nail into the gap between the pair of groove forming members at a cycle corresponding to the intermittent rotation of the rotating side groove forming member. The nail forming device according to claim 2 or 3, wherein the supply member and the rotation-side groove forming member are connected by an intermittent indexing mechanism that operates by receiving a drive from a drive source. 5. The rotary groove forming member is arranged so as to intermittently rotate in the horizontal direction, and the nail supply device suspends the nail by supporting the lower surface of the head of the nail on both sides of the shaft of the nail. The nail forming device according to claim 2, 3 or 4, further comprising a guide rail that supplies a gap between the pair of groove forming members in this state.