JPH0650139Y2 - Nail supply guide device for nailer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a door member that opens and closes an injection port provided in the nose portion of a nailing machine, and a fixed guide wall that faces the door member. The present invention relates to a nail supply guide device that variably sets a width of a nail supply passage formed between the two according to a connection method of connecting nails and guides and supplies the connecting nail along the nail supply passage.

(Prior art and its problems) In a nailing machine that uses a large number of connecting nails that are connected to each other and wound in a coil, the connecting nail housing magazine connects a cylindrical nose portion that receives the leading nail of the connecting nail. A nail supply passage is formed to supply and guide the nail.

The nail supply passage includes a fixed guide wall that extends from one side edge of the nail receiving opening that is opened to the side of the nose that is integrally formed with the nose portion to the vicinity of the nail discharge opening of the magazine, and the fixed guide wall. The door member is opposed to the nose portion with a certain gap therebetween and is rotatably supported with respect to the nose portion.

The fixed guide wall is provided with a nail feeding means that advances into the nail feeding passage and is reciprocally driven along the nail feeding direction, and prevents the connecting nail from moving in the opposite direction on the door member side. A non-return claw is provided.

On the other hand, as the connection mode of the connection nail used in this type of nail driving machine, the wire connection method in which the shaft portion of the nail is welded and connected to a fine wire, and the bending tabs are formed on the upper and lower edges along the longitudinal direction. There is a plastic sheet connection system in which a nail shaft is inserted and supported in an opening formed in a connection band of a plastic sheet and connected. These two types of connecting nails have different width-direction dimensions. That is, the plastic sheet connection method is wider. For this reason, there is known one in which the gap between the nail supply passages is variably set so that both types of connecting nails can be supplied (for example, Japanese Utility Model Publication No. 62-19179).

In such a conventional technique, as shown in FIGS. 7 (a) and 7 (b), the inner surface of the door member 40 (the surface forming the wall of the nail supply passage 41) has a protrusion close to the fixed guide wall 42. The slide plate 43 is provided so as to be movable between the position and the retracted position away from the fixed guide wall 42. The slide plate 43 is springed in a direction projecting toward the fixed guide wall 42 side with respect to the door member 40. The plate, which is biased and arranged,
A guide shaft 44 formed on 43 extends by inserting a guide hole 45 formed on the inner side wall of the door member 40, and a stop pin 46 provided on the guide shaft 44 is engaged with a different position on the outside of the door member 40. By making slide plate 43
Is set to a predetermined position.

By the way, in the above-mentioned conventional technique, since the slide plate 43 is configured to be held by the pressing force of the spring 47, the nail supply passage
In order to resist the pressing force of the nail in 41, a relatively strong spring is required, but it is necessary to move the plate 43 by hand to set the position of the slide plate 43. There is a limit. In particular, since the action of the spring at the protruding position becomes small, the phenomenon that the impact of the nail driving of the nail driver propagates to the nose portion 45 and the slide plate 43 moves in the direction away from the fixed guide wall 42 due to the vibration occurs. ing. This is because the above-mentioned nail feeding means is operated in the backward direction almost in synchronism with the impact of nail striking, so that the following problems occur.

(A) When the slide plate 43 moves in the direction away from the fixed guide wall 42 when the feeding claw 49 of the nail feeding means 48 retreats, the width of the nail supply passage 41 widens thereby, and the nail in the passage 41 moves. The shaft portion 44b is inclined toward the door member 40 side and the feed claw 49
As a result of being separated from the tip end of the second nail, the feed claw 49 may enter the rear side of the shaft portion of the second nail, and a double feed phenomenon may occur. In other words, the sliding stroke of the feed claw 49 is set according to the maximum connection pitch of the connecting nails used,
When using a nail having a connecting pitch smaller than this, the height of the nail is set high so that the feed nail 49 does not get over the shaft portion 44a of the second nail. Therefore, the nail shaft 44a
The feed claw 49 operates normally when the tool is held in the correct posture without tilting in the nail supply passage. However, when the nail tilts toward the door member 40, the feed claw 49 gets over the shaft of the second nail and enters the rear side of the second nail, resulting in double feed.

(B) When the check claw 51 is provided on the slide plate 43, the check claw 51 is moved along with the backward movement of the slide plate 43.
In some cases, the 51 is retracted from the normal position, and the connecting nail is returned following the movement of the feed claw 49 in the separating direction. In this case, since the nail is not supplied into the nose portion 50, the nail is idly fed, causing a blank driving phenomenon and damaging the nail driving machine.

Furthermore, in the above-mentioned conventional technique, the nail supply passage 41 is driven by the pressing force of the spring acting on the slide plate 43 by the nail driving operation.
Since a large spring force is required to maintain the distance between the two, the problem that the durability of the spring is poor, and to set the position of the slide plate 43 must be operated against the large spring force. However, there is a problem that it requires a strong force and it is difficult to perform the setting operation.

(Problems of the Invention) The present invention solves the above problems and prevents the slide plate from moving in a direction away from the fixed guide wall due to an impact at the time of driving the nail by a nailing machine, and sets the position of the slide plate. It is a technical object of the present invention to provide a nail supply guide device for a nailing machine that can be easily operated.

(Means for Solving the Problems) In order to solve the above problems, a nail supply guide device for a nailing machine according to the present invention is a nailing machine that uses connecting nails whose shafts are supported and connected by a connecting member. Fixed guide for feeding and guiding the connecting nail, which is integrally formed with a nose portion for receiving the leading nail of the connecting nail and driving the connecting nail into the workpiece, and one side edge of the nail receiving opening of the nose portion. A wall member, a door member that faces the fixed guide wall at a predetermined interval, and is openably and closably supported by the nose portion, and is formed between the door member and the fixed guide wall. And a supply passage for supplying the connecting nail to the nose portion,
A slide plate disposed on a side of the guide member facing the fixed guide wall and movable in a direction toward the fixed guide wall, and a slide plate is always provided between the door member and the slide plate from the fixed guide wall. A spring for urging the slide plate is provided so as to contact the back side of the slide plate to position the slide plate at a first position close to the fixed guide wall and a second position separated from the fixed guide wall. It is characterized in that the cam means is arranged on the door member, and the operation portion for operating the cam means is provided exposed to the outside of the door member.

(Operation and effect of the invention) In the above-mentioned structure, the operation means of the cam means is operated from the outside of the door member, and the cam means is resisted against the spring which constantly urges the cam means in the direction away from the fixed guide wall. The slide plate is brought into contact with the side to position the slide plate at a first position close to the fixed guide wall and at a second position separated from the fixed guide wall.

In this way, the first position or the second position
Since the slide plate positioned at the position is prevented from moving further in the direction away from the fixed guide by the cam means, the width of the nail supply passage formed by the fixed guide wall and the slide plate is fixed. Will end up. Therefore, it is possible to prevent the phenomenon that the slide plate moves due to the impact at the time of nail driving and the connecting nail tilts in the nail supply passage, and the connecting nail is always supplied to the nose portion while maintaining the correct posture. The plate will not retract due to impact or the like.

Further, since the slide plate can be moved by operating the operation portion, and the spring having a small spring force is sufficient, the setting operation of the slide plate can be easily performed with one hand.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 indicates a nose portion.
The nose portion 1 is provided at the tip of a nailing machine that uses a connecting nail 2 whose shaft portion is supported and connected by a connecting member as described above. The nose portion 1 drives a nail into a work material. An injection port 3 for receiving a nail is provided, and the injection port 3 is provided.
And a connection nail 2 between the connection nail supply magazine (not shown).
A nail supply passage 4 is formed to guide the supply. In the vicinity of the nose portion 1, the nail supply passage 4 has a fixed guide wall 5 integrally formed with one side edge of the nail receiving opening of the injection port 3.
And a door member 6 arranged to face the fixed guide wall 5 at a predetermined interval.

A feed claw (not shown) slides along the fixed guide wall 5.

The door member 6 is supported by a support shaft 7 so as to be openable and closable with respect to the nose portion 1. An opening 8 is formed in the center of the door member 6, and parallel recesses 9 and 10 are formed in the inner wall of the opening 8 and its vicinity. A slide plate 11 is arranged on the side of the door member 6 facing the fixed guide wall 5.

The slide plate 11 has a U-shaped cross section and is provided so as to be movable toward and away from the fixed guide wall 5 when the guide pin 12 and the guide hole 13 are fitted to each other. A tension spring 14 is interposed between the slide plate 11 and the slide plate 11. Therefore, the slide plate 11 is constantly urged against the door member 6 in a direction in which it is always separated from the fixed guide wall 5. Further, a check claw 18 is rotatably supported on a pin 17 provided between the upper and lower pieces 15 and 16 projecting to the back side of the slide plate 11. The check claw 18 prevents the connecting nail 2 in the nail supply passage 4 from moving in the opposite direction, and its tip projects from the opening 19 formed in the slide plate 11 toward the nail supply passage 4 side. There is.

Next, the door member 6 is provided with a cam means 20, and the cam means 20 is arranged so as to come into contact with the lower piece 16 protruding toward the back side of the slide plate 11.

That is, the lower piece 16 of the slide plate 11 is formed as an abutting piece, and faces the door member 6 side of the corresponding abutting piece 16 between the abutting portion 16a having a large protruding width and the abutting portion 16b having a small protruding width. The stepped portion 21 is formed to be gently inclined.

On the other hand, the cam member 20 is arranged on the door member 6. The cam means 20 is formed in a block shape, and the end of the contact surface 20a facing the slide plate 11 is formed to be inclined, and the convex portion 22 and the operating portion 23 are provided on the side facing the door member 6. Has been formed. The operation portion 23 of the cam means 20 is exposed outward from the opening 8 of the door member 6, the convex portion 22 abuts the concave portions 9 and 10 of the door member 6, and the abutting surface 20a. Are arranged so as to contact the contact piece 16 of the slide plate 11. When the abutting surface of the cam means 20 abuts on the abutting portion 16a of the abutting piece 16 of the slide plate 11 which has a larger protruding width, the width of the nail supply passage 4 is close to the fixed guide wall 5. Is positioned at a first position suitable for supplying a wire-connecting type nail, and when it comes into contact with the abutting portion 16b having a small protrusion width, it separates from the fixed guide wall 5 and the width of the nail feeding passage 4 Is set to a second position suitable for supplying a plastic sheet connection type connection nail.

In the above structure, when the operating portion 23 is pressed from one side of the door member 6 to one end of the opening (for example, the first left end), the contact surface 20a of the cam means 20 contacts the rear side of the slide plate 11. Since it abuts on the abutting portion 16a of the piece 16 having a large protruding width, the slide plate is caused by the spring force of the tension spring 14.
11 is positioned at the first position close to the fixed guide wall 5, and is prevented from moving further away from the fixed guide wall 5. On the other hand, when the operating portion 23 is moved to the opposite end, the convex portion 22 of the cam means 20 and the other concave portion 10 of the door member 6 come into contact with each other, and the contact surface of the cam means 20 has a slide plate. It slides over the step 21 of 11. The slide plate 11 is retracted from the first position by the tension spring 14 and separated from the fixed guide portion 5, and is brought into contact with the contact portion 16b having a small protrusion width to be positioned at the second position. Control unit 2
When 3 is moved in the opposite direction again, the contact surface 20a of the cam means 20 is
The slanted portion of the end of the slide plate slides along the contact piece 16 of the slide plate 11, and the slide plate 11 is positioned at the first position.

In this way, the slide plate 11 positioned at the first position or the second position by the operation of the operation portion 23 is prevented by the cam means 20 from moving further in the direction away from the fixed guide. The width of the nail supply passage 4 constituted by the fixed guide wall 5 and the slide plate 11 is fixed. Therefore, it is possible to prevent the phenomenon that the slide plate 11 moves due to the impact at the time of driving the nail and the connecting nail 2 tilts in the nail supply passage 4, and the connecting nail 2
Is always supplied to the nose section 1 while maintaining a correct posture.

Further, the slide plate 11 can be moved by operating the operation portion 23 to move left and right, and the tension spring 14
Since a spring having a small spring force is sufficient, the above operation can be easily performed with one hand.

The cam means 20 may directly contact the back surface of the slide plate 11.

Next, FIGS. 3 (a), (b) and FIG. 4 show another embodiment, in which the door member 6 and the slide plate are shown.
A tension spring 14 is interposed between 11 and 11, and the slide plate 11 is urged toward the door member 6 in a direction in which the slide plate 11 is always separated from the fixed guide wall 5.

A shaft 25 is provided in the vertical direction at the center of the cam means 20,
The shaft body 25 is supported by upper and lower pieces 16 protruding inward from the upper and lower ends of the door member 6. Further, the side surface of the cam means 20 is provided with an abutting surface 20b close to the shaft 25 and an abutting surface 20c far from the shaft 25, and an operating portion 23 is formed on the opposite side of these abutting surfaces 20b, 20c. Has been done.

The cam means 20 is arranged in the recess 26 of the door member 6, and is rotatably mounted by bearing the shaft 25 on the upper and lower walls 27 and 28 of the recess 26. The operation unit 23 is the door member 6
Is arranged so as to project outward from the opening 8.

In the above structure, the operation portion 23 of the cam means 20 is laterally moved from the outside of the door means to operate the contact surface 20 far from the shaft body 25.
When c abuts on the abutment piece 16 on the rear side of the slide plate 11, the slide plate 11 cannot move further in the direction away from the fixed guide wall 5, so that the slide plate 11 is positioned at the first position. To be done. When the operating portion 23 is moved to the opposite side, the contact surface close to the shaft 25 comes into contact with the back surface of the slide plate 11 this time, and the slide plate 11 cannot move further in the backward direction. The slide plate 11 is positioned at a second position away from the fixed guide wall 5.

Next, FIGS. 5 (a), (b) and FIG. 6 show still another embodiment, in which a tension spring 14 is interposed between the door member 6 and the slide plate 11, The plate 11 is always urged against the door member 6 in a direction away from the fixed guide wall 5.

The cam means 20 is formed in a tubular shape, a brim 30 is formed in the center, an abutting portion 31 facing the slide plate 11 side is formed to project, and an end portion on the door member 6 side is configured as an operating portion 23. Has been done.

The door member 6 is formed with a circular hole 32 for rotatably housing the operation portion 23 of the cam means 20.

On the other hand, on the back surface of the slide plate 11, a support rod 33 that penetrates and supports the cam means 20 is formed, and
A convex portion 34 is formed on the base portion thereof, and a lateral groove 35 is formed on the surface of the convex portion 34. The upper and lower stepped portions of the convex portion 34
36 is formed in an inclined shape.

When the contact portion 31 of the cam means 20 is in contact with the lateral groove 35 of the convex portion 34 of the slide plate 11, it is positioned at the first position close to the fixed guide wall 5 and contacts the base surface of the slide plate 11. It is set to be positioned at a second position away from the fixed guide wall 5 when in contact with each other.

In the above structure, when the operating portion 23 of the cam means 20 is rotationally operated from the outside of the door means and the abutting portion at the tip thereof abuts the lateral groove 35 of the convex portion 34 of the slide plate 11, the slide plate 11 is Since it cannot move further in the backward direction, the slide plate 11 is positioned at the first position. When the cam means 20 is further rotated by 90 °, the abutting portion goes over the step portion 21 of the convex portion 22 and abuts on the base surface. At this time, since the slide plate 11 cannot move in the direction away from the fixed guide wall 5, the slide plate 11 is positioned at the second position.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of a nail supply guide device in the vicinity of a nose part of a nailing machine according to the present invention, FIG. 2 is an exploded perspective view of a door member of the guide device, and FIG. 3 (a).
(B) is an operation explanatory view of another example of the guide device, FIG. 4 is an exploded perspective view of a cam means thereof, and FIGS. 5 (a) and (b) are operation explanatory views of still another example of the guide device. FIG. 6 is a perspective view of the cam means, and FIGS. 7 (a) and 7 (b) are cross-sectional views of a conventional nail supply guide device on a plane and a back surface, respectively. Reference numeral 1 ... Nose portion, 2 ... Connection nail, 5 ... Fixed guide wall, 6
... door member, 11 ... slide plate, 20 ... cam means, 23
... Operation section

Claims (1)

[Scope of utility model registration request] 1. A nailing machine using a connecting nail having a shaft portion supported and connected by a connecting member, the nose portion receiving a nail at the head of the connecting nail and driving the connecting nail to a workpiece. A fixed guide wall for supplying and guiding the connecting nail, which is integrally formed with one side edge of the nail receiving opening of the nose portion, is arranged to face the fixed guide wall at a predetermined interval, and to the nose portion. A door member that is openably and closably supported, a supply passage that is formed between the door member and the fixed guide wall and that supplies the connecting nail to the nose portion, and a side of the guide member that faces the fixed guide wall. A slide plate that is arranged and is movable in a direction toward the fixed guide wall, and always urges the slide plate between the door member and the slide plate in a direction away from the fixed guide wall. And a cam means for contacting the back side of the slide plate to position the slide plate at a first position close to the fixed guide wall and at a second position separated from the fixed guide wall on the door member. A nail supply guide device for a nail driving machine, wherein an operating portion for activating the cam means is provided so as to be exposed outside a door member.