JPH0617812A - Bent nail and its manufacture - Google Patents

Abstract

PURPOSE:To continuously and mechanically carry out positioning and bending of a nail concerning the bent nail the axial part of which is engaged with a cutout of its head part by way of reversing the axial part. CONSTITUTION:On a delivery member 24 provided on a rectilinear guide passage 21, an engagement projection 28 to engage with a cutout of a nail, and in the middle of the guide passage 21, a torque giving means 29 to rotate the nail is provided. On the rear part of the guide passage 21, a nail receiving member 33 to move in the longitudinal direction and a fixing means 41 to fix the head part of the nail are provided, and below the receiving member 33, a bending member 53 free to revolve vertically is provided. In this structure, by rotating the nail 1 while it is moved in the guide passage 21, the cutout is positioned on the engagement projection 28 of the delivery member 24, the bending member 53 is put in below the delivery member 24, and the nail 1 is bent at right angles. Thereafter, the delivery member 24 is retreated, the bending member 53 is revolved toward the receiving member 33, and the axial part of the nail 1 is bent to the head part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bent nail which is driven into a fragile base to prevent the bent nail from falling off, and a manufacturing method and a manufacturing apparatus therefor.

[0002]

2. Description of the Related Art If the base into which the nail is driven has a fragile structure such as foam concrete, the holding force of the base against the driven nail is weak and the nail easily comes off.

In particular, when vibration or impact is applied to the nail after the nail is driven, the nail wobbles and easily falls off the base.

In order to cope with such a problem, Japanese Utility Model Laid-Open No. 1-89606 proposes a long nail and a short nail having one end connected to a washer.
In order to manufacture the nails of this proposal, a press machine for forming long and short nails, a device for connecting both nails, a machine for forming washers, etc. are required. Will increase. In addition, since it is necessary to insert the molded long nails and short nails into the holes provided in the washer, the assembly work is troublesome, and there is a problem that continuous manufacturing cannot be performed by an automatic machine or the like.

Further, since the nail of the above-mentioned proposal has a structure in which the end of the short nail is bent to prevent it from coming off from the washer, if the long nail and the short nail are driven to the end and the end is further struck strongly. However, there is a problem that the long nail and the short nail easily enter the hole of the washer and the connection between each nail and the washer is released.

The present invention has been made to solve the above problems, and a first object thereof is to maintain a strong pull-out holding force even when vibration or impact is applied after driving into a fragile base, It is an object of the present invention to provide a nail for preventing falling that can be continuously manufactured by an automatic machine or the like.

A second object of the present invention is to provide a manufacturing method capable of continuously and efficiently manufacturing the above nails.

Further, a third object of the present invention is that all of the above-mentioned nails can be manufactured mechanically without any manual work, and the molding process of the nail shaft portion can be carried out by one apparatus. An object of the present invention is to provide a manufacturing apparatus that can be performed.

[0009]

A bending nail of the present invention for achieving the above first object is formed integrally with a shaft portion and one end of the shaft portion, and projects radially from a peripheral surface of the shaft portion. It is composed of a head and a notch is provided on the peripheral surface of the head, the shaft is inverted in the direction of the head from the middle, and the inverted shaft is allowed to enter the notch. The other end of the inverted shaft is projected from the head in the inversion direction.

Further, according to the manufacturing method of the present invention, the nail is rotated about its axis to position the notch formed in the head, and the shaft of the nail is inverted with the head fixed, and That is, the inverted shaft portion is inserted into the above-mentioned positioned notch.

Further, in the manufacturing apparatus of the present invention, a feed member for pressing the upper half of the shaft is movably provided in a linear guide passage for guiding the shaft of the nail, and the tip of the feed member is provided. An engaging protrusion that engages with a notch formed in the head of the nail, a rotation imparting means for rotating a nail fed in the passage is provided in the middle of the guide passage, and a feeding portion is provided in the rear portion of the guide passage. A receiving member that receives the upper half of the shaft portion of the nail that is pressed by the member, and fixing means that detachably fixes the head of the nail between the receiving member and the receiving member are provided below the receiving member. Also, a bending member that moves relative to the feed member and enters below the feed member is provided, and the bending member is rotatable toward the receiving member.

[0012]

In the above-mentioned bent nail, when the head of the nail is in contact with the mounting member and the protruding shaft portion is further hit, the inverted shaft portion is driven in the axial direction and the inverted portion of the shaft portion Expands to the left and right inside the base, and stops coming out of the base.

Further, in the manufacturing apparatus of the present invention, the nail is moved along the guide passage by the feeding member, and during the movement, the nail is rotated by the rotation imparting means, and the notch of the head is cut off from the tip of the feeding member. Engage with the engaging projection of. The upper half of the nail with the notch thus positioned is pressed against the receiving member by the feeding member, and the head of the nail is fixed by the fixing means.

Next, the bending member is moved relative to the above-mentioned feeding member and receiving member, and the bending member is inserted below the feeding member to bend the nail shaft at a right angle. next,
The feed member is retracted, the bending member is rotated toward the receiving member, and the shaft of the nail is bent so as to engage with the notch. After that, the fixing of the head by the fixing means is released, and the nail is taken out from the guide passage.

[0015]

1 and 2 show a bent nail according to an embodiment. The nail 1 is composed of a shaft portion 2 and a head portion 3 which are integrally formed, and the head portion 3 is formed in a flange-like shape projecting radially from the peripheral surface of the shaft portion 2. On the peripheral surface of the head 3,
A semicircular cutout 4 is formed, and the width of the cutout 4 is formed to be slightly larger than the diameter of the shaft portion 2.

Further, the shaft portion 2 is bent in the direction of 180 ° toward the head portion 3 from the middle, and the inverted shaft portion 2 is inserted into the notch 4 of the head portion 3, and in this engaged state. The end surface 5 of the shaft portion 2 projects upward with respect to the head portion 3.

In the nail 1 having such a structure, as shown by the solid line in FIG. 1, the shaft portion 2 protruding from the head portion 3 is struck and driven into the mounting member 12 and the base 11 such as foam concrete, and the head portion When the end surface 5 of the shaft portion 2 is further struck from the state where the portion 3 is in contact with the mounting member 12, the shaft portion 2 is driven in the axial direction by the guide of the notch 4 and, as shown by the chain line in FIG. The inverted portion of the portion 2 expands to the left and right inside the base 11 to prevent the nail 1 from coming out of the base 11.

In this structure, the shaft portion 2 expands in diameter from the state where the head portion 3 is in contact with the mounting member 12 until the end surface of the shaft portion 2 is at the same height as the head portion 3 to prevent the shaft portion 2 from coming out. for,
From the beginning to the end of the driving of the shaft, the holding force of the nail is almost the same, and stable dropout prevention can be performed.

Further, when the nail 1 is vibrated or shocked after the driving is completed, the nail is driven further deeply and the deformation of the shaft portion 2 becomes large, so that the holding force of the nail may be strengthened but not weakened. .

Further, after driving the shaft portion 2 to the end,
Further, even if the shaft portion 2 and the head portion 3 are strongly hit, the head portion 3 and the shaft portion 2 are integrally formed, so that the head portion 3 and the shaft portion 2 are not separated from each other and the mounting member 12 is fixed. Stable and maintained.

FIG. 3 shows a second embodiment of the bent nail. In the bent nail 1 ′ of this example, a sharpened tip portion 6 is formed on the outer surface of the inverted portion of the shaft portion 2 in a direction opposite to the inverted direction. By thus providing the pointed portion 6 at the inverted portion, the bending nail 1'can be easily driven into the mounting member and the base, and stable driving can be performed.

Further, knurling 7 is applied only to the surface of the portion of the shaft portion 2 which is not bent to increase the hardness of the shaft portion 2. As a result, inconvenient bending of the shaft portion 2 during driving can be prevented, and reliable driving can be performed.

Reference numeral 8 in the drawing denotes a notch provided in the vicinity of the inverted portion of the shaft portion 2. By providing the notch 8 in this way, the position and shape in which the shaft portion 2 expands is changed. be able to.

On the other hand, FIGS. 4 to 14 show a manufacturing apparatus of the embodiment, of which FIG. 4 is a front view of the manufacturing apparatus, FIG. 5 is a plan view of the same, and FIG. FIG.

In the figure, reference numeral 21 denotes a guide passage for guiding the shaft portion B of the nail A in a straight line direction. The guide passage 21 is provided laterally with the nail 1 for supplying the nail 1 before bending to the guide passage 21. The supply chute 22 is connected. At the exit of the supply chute 22, the stop plate 2 that moves forward and backward is reciprocated.
3 is provided so that the nail 1 discharged from the supply chute 22 is temporarily held in front of the guide passage 21 and then sequentially fed.

A feed member 24 for pressing the upper half of the shaft portion 2 of the nail 1 is provided inside the guide passage 21 so as to be movable in the front-rear direction. A groove 25 into which the shaft portion 2 of the nail 1 is fitted is formed at the front end of the feed member 24, and at the rear end,
A driving machine (not shown) such as an air cylinder is connected via a link 26, and the feed member 24 reciprocates in the front-rear direction by the operation of the driving machine. Further, a positioning plate 27 protruding above the guide passage 21 is attached to the upper surface of the tip of the feeding member 24, and the tip of the positioning plate 27 is engaged with the notch 4 provided in the head 3 of the nail 1. The engaging projection 28 is formed.

Further, in the middle of the guide passage 21, there is provided a rotation imparting means 29 for imparting a rotational force in the rotation direction to the nail 1 moving in the passage 21. This rotation imparting means 29
The two friction belts 31 and 32, which are stretched between the three pulleys 30, are made to face each other toward the inside of the guide passage 21, and one of the pulleys 30 and the belt 3 is provided.
A shaft (2) surface of the nail 1 fed by the feeding member 24 is formed by connecting a motor (not shown) for rotating the belts 1 and 32 and rotating the belts 31 and 32 in opposite directions. A rotating force due to friction is applied to the nail 1 to cause the nail 1 to rotate. Further, the contact length of the belts 31 and 32 with the nail is set to a length such that the rotation amount of the nail 1 can be rotated by at least one rotation or more. The notch 4 of the head 3 always engages with the engaging protrusion 28 of the feed member 24 to move the nail 1 while it moves while rotating.

On the other hand, a receiving member 33 for receiving the nail 1 fed by the feeding member 24 is provided at the rear portion of the guide passage 21. The receiving member 33 is provided so as to be movable in the front-rear direction, and has a spring 34 installed at its rear end.
It is positioned at the fixed position shown in FIGS. 4 and 5 by the elasticity of. The height H of the receiving member 33 is equal to that of the sending member 24.
Similarly to, the receiving surface 35 that is formed to have a size to receive the upper half of the shaft portion 2 of the nail 1 and faces the guide passage 21.
A groove 36 is formed in which the shaft portion 2 is fitted.
Further, at the rear end of the receiving member 33, an operating shaft 37 that extends downward
Is attached, and its operating shaft 37 is fitted between two rollers 39 and 40 attached to the tip of the crank 38. The crank 38 is oscillated and rotated in the front-rear direction by a driving device (not shown), and the contact between the rollers 39 and 40 causes the receiving member 33 to move back and forth.

A fixing means 41 for fixing the head 3 of the nail 1 received by the receiving member 33 is provided above the receiving member 33. The fixing means 41 includes a clamp plate 44 mounted on the upper surface of the receiving member 33 so as to be vertically swingable via columns 42 and pins 43, and a cam plate 46 that is in sliding contact with cam rollers 45 on both sides of the tip of the clamp plate 44. , A spring 47 for urging the rear end of the clamp plate 44 upward so as to press the cam roller 45 against the cam plate 46, and the cam plate 46 is fixed to the frame 52 of the manufacturing apparatus.

Further, the cam plate 46 has first cam surfaces 48, 48 of the same height formed at both ends thereof, and the inclined surface 4 is formed at the center thereof.
Second connecting to the first cam surface 48,48 via 9,50
A cam surface 51 is formed, and as shown in FIG. 11, the cam roller 4 of the clamp plate 44 is attached to the first high cam surfaces 48, 48.
In the state where 5 is in sliding contact, the pressing surface 44a of the clamp plate 44
When a cam roller 45 comes to the second lower cam surface 51 as shown in FIG. 12 due to a gap between the clamp plate and the receiving member 33, the tip of the clamp plate 44 is rotated downward by the elasticity of the spring 47, and the clamp plate is rotated. The head 3 of the nail 1 is fixed between 44 and the upper surface of the receiving member 33.

A bending member 53 for bending the shaft portion 2 of the nail 1 is provided below the receiving member 33. The bending member 53 is attached such that the upper surface 53a thereof is normally opposed to the lower surface of the receiving member 33 in parallel, and when the feeding member 24 and the receiving member 33 move rearward, the bending member 53 enters below the feeding member 24 and enters the shaft portion 2. The feed member 24 is formed so as to be bent at a right angle and faces in parallel.
Grooves 54, 54 into which the shaft portion 2 of the nail 1 to be bent is inserted are formed on the lower surface 24a and the upper surface 53a of the bending member 53. Further, the bending member 53 is vertically swingable around a shaft 55 passing through the central portion as a fulcrum, and a drive device (not shown) for swinging the bending member 53 is provided at a rear end portion 53b. ) Are connected.

The manufacturing apparatus of this embodiment has the above-mentioned structure, and its operation will be described below. The unprocessed nail 1 sent out from the supply chute 22 is temporarily held in front of the guide passage 21 by the stop plate 23, and when the feed member 24 retracts to the front end portion of the guide passage 21, the guide passage 2
1 are sequentially supplied.

The feed member 24 starts to move forward when the nail 1 is supplied into the guide passage 21, and moves the nail 1 along the guide passage 21. When the nail 1 reaches the position of the rotation imparting means 29, the nail 1 rotates due to the friction of the belts 31 and 32, and the notch 4 of the head 3 is fed as shown in FIG. 6 while the nail 1 makes one rotation. The nail 1 is positioned by engaging the engaging protrusion 28 of the member 24.

The positioned nail 1 further moves in the guide passage 21, and the upper half portion of the shaft portion 2 is pressed between the feeding member 24 and the receiving member 33 as shown in FIG.

When the nail 1 is pressed in this way, as shown in FIG.
2, the crank 38 at the rear end of the receiving member 33 swings to the right in association with the movement of the feeding member 24,
4 and the receiving member 33 move backward integrally.

As the receiving member 33 moves, the cam roller 45 of the clamp plate 44 of the fixing means 41 moves the cam plate 46.
Moving toward the lower second cam surface 51, the clamp plate 44 swings downward, and the head 3 of the nail 1 is fixed between the pressing surface 54a and the receiving member 33.

Then, the bending member 53 enters below the feed member 24 a little later than the fixing of the nail 1, and the nail 1
The shaft portion 2 is bent at a right angle from the middle. In this case, since the bending member 53 bends the nail 1 in the moving direction of the feed member 24 in which the notch 4 of the nail 1 is positioned, the shaft portion 2 of the nail 1 is accurately aligned with the notch 4 of the head 3. Can be bent in opposite directions.

When the bending is completed, as shown in FIG. 13, the feeding member 24 retracts to the front end portion of the guide passage 21, and then the bending member 53 rotates upward toward the receiving member 33. . As a result, the shaft portion 2 of the nail 1 is bent toward the receiving member 33 and is engaged with the notch 4 of the head portion 3.

Next, as shown in FIG. 14, the receiving member 3
When the cam 3 is moved rearward by the operation of the crank 38, the cam roller 45 of the clamp plate 44 causes the cam roller 45
Climbing on the cam surface 48, the tip of the clamp plate 44 rotates upward, and the fixation of the head 3 of the nail 1 is released. As a result, the nail 1 received by the receiving member 33 falls off from the receiving member 33 and drops from the discharge port 56 below the receiving member 33. A nail storage box is provided in the discharge port 56 via a chute or the like.

When the manufacturing process of the nail 1 is completed as described above, the feed member 24 retracted to the front end portion of the guide passage 21 starts to move forward again, and the same manufacturing process described above is repeated.

In the above embodiments, the friction belts 31 and 32 are used as the means for applying the rotating force to the nail, but the nail may be rotated by other means such as vibration. .

Further, the nail fixing means 41 is provided with the receiving member 33.
Although the nail is fixedly released in association with the movement of the receiving member 33, the nail may be fixed independently of the movement of the receiving member 33.

Further, although the bending member 53 has a structure capable of only rotating up and down, the receiving member 33 is fixed,
The bending member 53 may be movable in the front-rear direction, and the nail may be bent between the bending member 53 and the feeding member 24.

[0044]

[Effect] As described above, in the bent nail of the present invention, the shank is inverted and projected from the head, and the shank is enlarged by hitting the projected part, so that the bent nail is strongly held against a fragile base. A force can be obtained, and the nail can be completely prevented from falling off even under the action of vibration or impact.

Further, since the shaft and the head are integrally formed, the shaft and the head are not separated even if the nail is strongly hit after the shaft is driven, and the mounting member can be stably fixed. it can.

Further, since the nail of the present invention can be formed by inserting the inverted shaft into the notch in the head, continuous molding by an automatic machine is possible, and there is an advantage that efficient manufacturing can be performed. .

Further, according to the manufacturing method and the manufacturing apparatus of the present invention, the positioning of the notch of the nail and the bending of the shaft portion can be all mechanically performed without manual work. Can be performed extremely efficiently.

Further, since all the steps of bending the nail can be performed by one apparatus, there is an effect that the equipment space can be made compact and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing a nail of an embodiment.

FIG. 2 is a plan view of the above.

FIG. 3 is a front view showing another embodiment of the bent nail.

FIG. 4 is a front view showing the manufacturing apparatus of the embodiment.

FIG. 5 is a plan view of the above.

FIG. 6 is a cross-sectional plan view showing an enlarged main part of the above.

FIG. 7 is a sectional view taken along line VII-VII in FIGS. 4 and 5.

FIG. 8 is a sectional view taken along line VIII-VIII of FIGS. 4 and 5.

FIG. 9 is a sectional view taken along line IX-IX in FIGS. 4 and 5.

FIG. 10 is a cross-sectional view taken along line XX of FIGS. 4 and 5.

FIG. 11 is a sectional view showing the operation of the manufacturing apparatus of the embodiment.

FIG. 12 is a sectional view showing the same operation.

FIG. 13 is a sectional view showing the same operation.

FIG. 14 is a sectional view showing the same operation.

[Explanation of symbols]

 1, 1'Nail 2 Shaft part 3 Head part 4 Notch 5 End surface 6 Pointed part 11 Base 12 Mounting member 21 Guide passage 22 Supply chute 24 Feeding member 28 Engagement protrusion 29 Rotation imparting means 31, 32 Friction belt 33 Receiving member 38 Crank 41 Fixing means 44 Clamp plate 46 Cam plate 53 Bending member

Claims (4)

[Claims] 1. A shaft portion and a head portion which is integrally formed at one end of the shaft portion and which projects radially from the shaft portion peripheral surface. A notch is provided on the peripheral surface of the head portion, and the shaft portion is provided. Is bent in the direction of the head from the middle, the reversed shaft is inserted into the notch, and the other end of the reversed shaft is projected in the inversion direction from the head in the inserted state. 2. The bent nail according to claim 1, wherein the outer surface of the inverted portion of the shaft portion has a pointed shape that is tapered in the direction opposite to the inverted direction. 3. A nail is rotated about its axis to position a notch formed in the head, the shaft of the nail is inverted with the head fixed, and the inverted shaft is positioned as described above. For manufacturing bent nails that can be inserted into notches. 4. A feed member for pressing the upper half of the shaft is movably provided in a linear guide passage for guiding the shaft of the nail, and the head of the nail is formed at the tip of the feed member. An engaging protrusion that engages with the cutout is provided, and in the middle of the guide passage,
Providing rotation imparting means for rotating the nail fed in the passage,
A receiving member for receiving the upper half of the shaft portion of the nail pressed by the feed member and a fixing means for detachably fixing the head of the nail between the receiving member and the receiving member are provided at the rear portion of the guide passage. A bending nail manufacturing apparatus in which a bending member that moves relative to the receiving member and the feeding member and enters below the feeding member is provided below the receiving member, and the bending member is rotatable toward the receiving member. .