JP5998847B2 - Nailer - Google Patents

Description

  The present invention relates to a nailing machine, and more particularly to a nailing machine characterized by a structure for controlling the attitude of a nail during injection.

  Conventionally, as this type of nail driver, one having a contact member for enhancing safety at the tip of a nose portion is generally known. The contact member slides along the driving direction of the nail by being pressed against the material to be driven, and is formed so that the pulling operation of the trigger lever is invalid (impossible) until it is pressed by the material to be driven. The nail is not driven out even if the trigger lever is operated in a state where the contact member is not pressed against the driven material.

  In addition, there is also known one that guides the position of a nail by a contact nose provided with a nail injection passage in such a contact member. The contact nose has an injection path that stably supports the position of the nail. By providing this contact nose, the position of the nail can be stably held until it penetrates into the member. Can be effectively prevented.

  However, since the inner diameter of the contact nose is formed to match the maximum head diameter of the nail that can be used with a nail driver, nails with a small head diameter or wire diameter or short nails are placed in the injection path when driven. The inclination angle at becomes larger. And if a nail is driven in with inclining, there is a problem that a nail will buckle.

  In order to solve such a problem, for example, a configuration in which a contact nose can be replaced is known. By making it possible to replace the contact nose, it is possible to use a contact nose with an inner diameter that matches the head diameter of the nail to be used, so that it is possible to prevent the nail from tilting in the injection path and to prevent the nail from buckling. it can.

  As another solution, for example, in the invention described in Patent Document 1, a rotary foot tip guide member (ratchet member) is provided on the contact nose. The foot tip guide member includes an inclined surface that guides the tip of the nail inclined toward the rear side of the injection port into the injection port, and a guide surface that guides the tip of the nail to the center of the injection port, and enters the injection port. It is so energized. According to such a configuration, since the tip of the nail can be guided forward, the nail can be driven almost perpendicularly to the driven material by a synergistic action with the reaction of the nail hitting. Can be prevented from buckling.

  Although not provided with a contact nose, Patent Document 2 discloses a configuration in which a rotary foot tip guide member (guide portion) is provided on the injection path of the main body housing.

JP 2004-330366 A JP 2009-83091 A

  However, in the configuration in which the contact nose can be replaced, there is a problem that the replacement work is complicated and the removed contact nose is lost.

  In addition, when the contact nose is provided with a rotary toe guide member, the tip of the contact nose becomes large and heavy, so the nose portion cannot be inserted in a narrow place, and the center of gravity moves to the tip side. In addition, there is a problem that the operability becomes worse due to poor handling.

  In this regard, in the case of the configuration described in the first embodiment of Patent Document 2 described above, since the rotary foot tip guide member (guide portion) is provided on the injection path of the nose portion, the contact member does not become large. However, since the contact nose is not provided and the contact member does not guide the position of the nail, especially when the nail driving depth is set to be shallow, It cannot be guided and the nail posture cannot be stably supported. For this reason, the original problem of preventing buckling cannot be solved.

  Thus, it is effective to use a contact nose to prevent the buckling of the nail, and further, the contact nose is replaced in order to cope with the head diameter of the nail, or a toe guide member is provided on the contact nose. It is known that there was a problem with each.

  Therefore, the present invention can stably support the position of the nail until the end of driving without the need to replace the contact nose, and keep the tip shape of the contact nose compact. It is an object of the present invention to provide a nailing machine that can be used.

  The present invention has been made to solve the above-described problems, and is characterized by the following.

(Claim 1)
The invention described in claim 1 is characterized by the following points.

That is, the nail driver according to claim 1 forms a nose part that forms an injection path through which the hit nail is driven, an injection path that is continuous with the injection path of the nose part, and the nose part. A contact nose that is slidably supported and pressed against the material to be driven, and a toe guide member in which a guide surface for guiding a nail is formed in the nose portion enters the injection path of the contact nose And a notch wall portion is formed on the inner surface of the contact nose to allow the foot tip guide member to enter, and the width of the notch wall portion is It is characterized in that it is formed so as to gradually become smaller in the driving direction .

(Claim 2)
The invention described in claim 2 has the following features in addition to the features of the invention described in claim 1 described above.

  In other words, the minimum width of the cut wall is smaller than the minimum head diameter of a nail that can be used with the nailing machine.

(Claim 3 )
The invention described in claim 3 is characterized by the following points in addition to the characteristics of the invention described in claim 1 or 2 .

  That is, the maximum width of the missing wall portion is equal to the inner diameter of the injection path of the contact nose.

(Claim 4 )
The invention described in claim 4 is characterized by the following points in addition to the features of the invention described in any one of claims 1 to 3 .

  That is, the guide surface of the toe guide member is characterized in that the lower part is formed narrower than the upper part.

  The invention according to claim 1 is as described above, and since the injection path that is continuous with the injection path of the nose portion is formed in the contact nose, even when the driving depth of the nail is set shallow, the final driving is completed. Can guide the nail up. In addition, since the nail is guided by the guide surface of the foot guide member, the nail can be stably supported even when the head diameter of the nail is small, without replacing the contact nose.

  In addition, since the foot guide member is rotatably attached to the nose portion and is separate from the contact nose, the provision of the foot guide member has an effect on the size and weight of the contact nose. Since it is small, the tip shape of the contact nose can be kept compact, and the influence on operability due to the provision of the foot guide member can be reduced.

Further, it is possible because the formation of the Ketsukabe portion for enabling ingress said foot guide member to the inner surface of the co Ntakutonozu, is advanced into the contact nose smoothly foot guide member.

Also, is formed so as gradually smaller toward the direction breadth implantation Ketsukabe of co Ntakutonozu, in other words, in the vicinity of the injection port inner surface is more circular contact nose forming the exit path of the nail The nail is held by the inner surface of the contact nose having a shape close to a circle so that the nail can be stably supported. For this reason, it is possible to ensure the pick-up of the toe of the nail by enlarging the guide surface of the toe guide member at the upper part, and the nail by making the inner surface of the contact nose into a nearly circular shape at the lower part. The head can be securely held.

  Further, in the present invention, since the foot tip guide member is rotatably fixed to the nose portion, the relative position between the foot tip guide member and the contact nose can be changed by changing the driving depth of the nail by the driving depth adjusting mechanism. Changes. For this reason, when the driving depth of the nail is set shallow by the driving depth adjusting mechanism, the foot tip guide member may not reach the tip of the contact nose. Since the nail can be held on the inner surface of the nose, the nail can be stably supported even without the toe guide member.

The invention according to claim 2 is as described above, and the minimum width of the notch wall portion is set to be smaller than the minimum head diameter of a nail that can be used in the nailing machine. The nail does not fall off the injection path due to the part falling in the direction of the missing wall.

The invention according to claim 3 is as described above, and the maximum width of the notch wall portion is equal to the inner diameter of the injection path of the contact nose, so that the guide surface of the foot guide member is enlarged. It is possible to ensure the picking up of the tip of the nail.

Also, the invention according to claim 4 is as described above, and the guide surface of the foot tip guide member is formed so that the lower portion is narrower than the upper portion. Increasing the size of the nail can surely pick up the tip of the nail, and at the lower part, the inner surface of the contact nose has a nearly circular shape, so that the head of the nail can be securely held.

It is a side view of a nailing machine. It is a partial expansion perspective view of the nose part vicinity. It is a rear view of a contact nose. It is a perspective view of a foot tip guide member. It is (a) front view of a foot tip guide member, (b) top view, (c) side view, (d) bottom view, (e) back view. It is a partial cross-sectional view of the vicinity of the nose when the driving depth is set to the deepest, (a) a diagram showing a state before the contact nose is pressed against the driven material, and (b) the contact nose as the driven material. It is a figure which shows the state after pressing. It is sectional drawing in the cutting line shown in FIG.6 (b), Comprising: (a) AA sectional drawing, (b) BB sectional drawing, (c) CC sectional drawing, (d) DD sectional drawing (E) It is EE sectional drawing. It is a partial sectional view of the vicinity of the nose portion when the driving depth is set to the shallowest, (a) a diagram showing a state before the contact nose is pressed against the driven material, and (b) the contact nose as the driven material. It is a figure which shows the state after pressing. It is sectional drawing in the cutting line shown in FIG.8 (b), Comprising: (a) A'-A 'sectional drawing, (b) B'-B' sectional drawing, (c) C'-C 'sectional drawing, d) D'-D 'sectional view, (e) E'-E' sectional view, (f) F'-F 'sectional view. It is a partially expanded perspective view of the nose part vicinity which concerns on another embodiment of this invention.

  Embodiments of the present invention will be described with reference to the drawings.

  A nailing machine 10 according to the present embodiment is a pneumatic nailing machine for driving a nail using compressed air. As shown in FIG. 1, the nailing machine 10 is connected to the body housing 11 and the rear of the body housing 11. A grip housing 13 and a magazine 16 connected to the rear of the body housing 11 below the grip housing 13 are provided.

  Although not shown in the drawings, a striking cylinder is disposed inside the body housing 11, and a striking piston is slidably accommodated in the striking cylinder. A driver for striking a nail is connected to the lower surface of the striking piston so that the driver can drive the nail when the striking piston is actuated.

  A nose portion 12 in which an injection path for injecting a nail is formed is provided at a lower end of the body housing 11, and the above-described driver is slidably guided toward the nose portion 12. A nail supply mechanism is provided behind the nose portion 12, and this nail supply mechanism supplies the nails in the magazine 16 sequentially into the nose portion 12 in accordance with the driving of the nail. .

  A contact nose 20 is disposed at the tip of the nose portion 12 so as to be movable up and down with respect to the nose portion 12 and pressed against the driven material. The contact nose 20 is slidably attached to the tip of the nose portion 12 and is slidable along the nail injection direction. The contact nose 20 is connected to a contact arm (not shown) that constitutes a safety device of the nail driver 10, and when the contact nose 20 is pressed against the driven material and slides, the contact arm integrally moves up. It is like that. When the contact arm moves up, compressed air can be supplied into the striking cylinder (nail launching) by operating the trigger 15.

  That is, when the trigger 15 is operated with the contact nose 20 pressed against the workpiece (or when the contact nose 20 is pressed against the workpiece with the trigger 15 operated), the air compressor connected to the end cap portion 17. Compressed air supplied from an air supply source is supplied into the striking cylinder, and this compressed air acts on the striking piston to drive the striking piston, and a driver coupled to the striking piston strikes the nail. At this time, the driver and the nail are stably guided in posture by the injection path 40 inside the contact nose 20, and the nail is driven out from the injection port 42 opened at the tip of the contact nose 20.

  An adjuster knob 41 that can be rotated is provided in the vicinity of the trigger 15. The adjuster knob 41 constitutes a driving depth adjusting mechanism. By rotating the adjuster knob 41, the movable region of the contact nose 20 (that is, the contact arm) is adjusted to set the driving depth of the nail. Be able to. That is, the pushing width of the contact nose 20 is constant, but the nail driving depth is changed by changing the relative positional relationship between the nose portion 12 and the contact nose 20 up and down while maintaining this constant width. It can be made to.

  Further, as shown in FIG. 2, a foot tip guide member 30 for stably supporting the posture of the nail is attached to the vicinity of the tip of the nose portion 12 in a rotatable manner. The toe guide member 30 can enter the contact nose 20 from a notch 22 (described later) of the contact nose 20 and is urged by the urging member 37 in the direction of entering the contact nose 20. ing.

  As shown in FIG. 3, the contact nose 20 has a slit extending along the nail driving direction, and a part of the inner surface 21 of the contact nose 20 is missing due to the slit. The notched wall portion 22, which is a part of the inner surface 21 that is notched, is composed of a substantially parallel wide upper portion 22 a, a lower constricted middle portion 22 b, and a substantially parallel narrow bottom portion 22 c, The lateral width is formed so as to gradually decrease in the driving direction.

  The lateral width of the upper portion 22a of the missing wall portion 22 (see the width W1 shown in FIG. 7A) is formed with a width that is substantially equal to the diameter of the inner periphery of the contact nose 20. This is to increase the area of the guide surface 32 (described later) of the foot guide member 30 facing the injection path 40.

  Further, the lateral width of the lower portion 22 c of the notch wall portion 22 (see the width W <b> 2 shown in FIG. 7E) is set smaller than the minimum head diameter of the nail that can be used with the nail driver 10. This is to prevent the nail head from falling in the direction of the notch wall portion 22 and the nail from going out of the injection path 40.

  As shown in FIGS. 4 and 5, the foot tip guide member 30 is a substantially L-shaped member having a shaft hole 34 formed in an intermediate portion thereof, a guide portion 31 extending below the shaft hole 34, and a shaft And a spring receiving portion 33 provided behind the hole 34.

  The shaft hole 34 penetrates the rotation shaft 36 and becomes the rotation center of the foot guide member 30. As shown in FIG. 2, the rotation shaft 36 is fixed to a shaft fixing portion 12 a provided integrally with the nose portion 12.

  The guide portion 31 is a portion disposed along the extending direction of the missing wall portion 22 of the contact nose 20, and includes a guide surface 32 that faces the inner surface 21 of the contact nose 20. As shown in FIG. 7 and the like, the guide surface 32 is a curved surface having a radius substantially equal to the inner periphery of the contact nose 20 in a plan view, and forms a nail injection path 40 together with the inner surface 21 of the contact nose 20. doing.

  As shown in FIGS. 4 and 5, the guide surface 32 of the guide portion 31 includes an upper wide portion 32a and a lower narrow portion 32b, and becomes narrower as it goes downward. Further, when this guide surface 32 is viewed in the front-rear direction, as shown in FIG. 5C, it has a shape that gently protrudes forward as it goes downward.

  The spring receiving portion 33 is a circular recess provided to receive the urging force of the urging member 37. One end of the biasing member 37 that biases the foot guide member 30 is fixed by being fitted into the spring receiving portion 33, and the other end is fixed by being fitted into the spring support portion 12 b formed in the nose portion 12. Has been. Thus, the foot tip guide member 30 is constantly urged by the urging force of the urging member 37, and the guide portion 31 is urged in a direction to enter the contact nose 20. For this reason, the toe of a nail (not shown) that is about to pass through the injection path 40 formed inside the contact nose 20 is guided forward by the toe guide member 30 and attached to the biasing member 37. It is driven downward while expanding the injection path 40 against the force. As described above, by providing the foot tip guide member 30, the posture of the nail can be stably supported.

  FIG. 6 is a partial cross-sectional view of the vicinity of the nose portion 12 when the driving depth is set to the deepest by the driving depth adjusting mechanism. As shown in this figure, by pressing the contact nose 20 against the workpiece, the contact nose 20 slides with respect to the nose portion 12, and at the same time, the relative position between the contact nose 20 and the toe guide member 30 also changes. . At this time, the lateral width of the missing wall portion 22 of the contact nose 20 and the lateral width of the guide portion 31 (guide surface 32) of the toe guide member 30 are formed so as to gradually decrease in the driving direction so as to correspond to each other. Therefore, even if the guide portion 31 of the toe guide member 30 slides along the missing wall portion 22 of the contact nose 20, the two do not interfere with each other.

  FIG. 7A is a cross-sectional view of the uppermost portion of the guide surface 32 of the foot tip guide member 30. As shown in FIG. 7A, the guide surface 32 of the toe guide member 30 is the widest at the uppermost part, and the toe of the nail trying to pass through the inside of the contact nose 20 flows backward. If so, the tip of the nail is surely picked up and guided forward.

  Further, as shown in FIGS. 7A to 7E, the lateral width of the missing wall portion 22 of the contact nose 20 is gradually reduced in the driving direction, so that the nail injection path 40 is formed in the vicinity of the injection port 42. The inner surface 21 of the contact nose 20 to be formed has a more circular shape. For this reason, in the upper part, the guide surface 32 of the foot guide member 30 is enlarged to ensure the pick-up of the foot of the nail, and in the lower part, the inner surface 21 of the contact nose 20 is made to have a nearly circular shape. It is formed so as to hold and securely hold the head.

  FIG. 8 is a partial cross-sectional view of the vicinity of the nose portion 12 when the driving depth is set to the shallowest by the driving depth adjusting mechanism. Thus, when the driving depth of the nail is set to be shallow by the driving depth adjusting mechanism, even if the contact nose 20 is pressed against the driven material, the toe guide member 30 does not reach the tip of the contact nose 20. For this reason, the nail posture maintaining function by the foot tip guide member 30 cannot be used at the tip of the contact nose 20. However, even in such a case, since the head of the nail is held by the inner surface 21 of the contact nose 20 having a nearly circular shape (see FIG. 9 (f)), the nail is stably supported without the toe guide member 30. can do.

  As described above, the shape of the missing wall portion 22 of the contact nose 20 and the guide portion 31 of the foot tip guide member 30 is devised so as not to interfere with each other when sliding. However, since the relative position between the contact nose 20 and the toe guide member 30 is not constant due to the operation of the driving depth adjusting mechanism, when the driving depth is set to the shallowest by the driving depth adjusting mechanism, the notch wall portion The gap between 22 and the guide part 31 will become large. However, in this embodiment, as shown in FIG. 9A, the contact nose is set when the nail driving depth is set to the shallowest by the driving depth adjusting mechanism and the contact nose 20 is pressed against the driven material. Since the maximum width G of the gap formed between the 20 notch walls 22 and the toe guide member 30 is set smaller than the minimum head diameter of the nail that can be used in the nail driver 10, the notch wall Even when the gap between 22 and the guide portion 31 is large, the nail does not fall out of this gap. For this reason, the nail does not come out from the gap between the contact nose 20 and the toe guide member 30 regardless of how the driving depth is set.

  As described above, according to the present embodiment, the inner surface 21 of the contact nose 20 pressed against the material to be driven is stably supported for the position of the nail, so that the nail driving depth is set to be shallow. The nail can be guided to the end of the punching. In addition, since the position of the nail is stably supported by the guide surface 32 of the toe guide member 30 that has entered from the missing wall portion 22 of the contact nose 20, even if the head diameter of the nail is small, the contact nose 20 is not required to be replaced. Can be held stably.

  Further, since the foot tip guide member 30 is rotatably attached to the nose portion 12 and is separate from the contact nose 20, the size and weight of the contact nose 20 due to the provision of the foot tip guide member 30. Since the influence on the height is small, the tip shape of the contact nose 20 can be kept compact, the visibility is good, and the influence on the operability due to the provision of the foot guide member 30 can be reduced.

  In the above-described embodiment, the missing wall portion 22 of the contact nose 20 is provided as a slit. However, the embodiment of the present invention is not limited to this, and the missing wall portion 22 connects the foot tip guide member 30 to the contact nose 20. Any form may be used as long as it can enter the interior of the door. For example, as shown in FIG. 10, the shape may cover a part of the foot tip guide member 30. Alternatively, it may be a bag-like shape that covers the entire foot guide member without providing the slit of the missing wall portion 22.

DESCRIPTION OF SYMBOLS 10 Nailer 11 Body housing 12 Nose part 12a Shaft fixing part 12b Spring support part 13 Grip housing 15 Trigger 16 Magazine 17 End cap part 20 Contact nose 21 Inner surface 22 Missing wall part 22a Upper part 22b Middle part 22c Lower part 30 Toe guide member 31 Guide part 32 Guide surface 32a Wide part 32b Narrow part 33 Spring receiving part 34 Axle hole 36 Rotating shaft 37 Biasing member 40 Injection path 41 Adjuster knob (Damping depth adjusting mechanism)
42 Injection port

Claims (4)

A nose portion that forms an injection path through which the struck nail is driven,
A contact nose that forms an injection path that is continuous with the injection path of the nose part, is slidably supported against the nose part, and is pressed against the workpiece.
With
To the nose portion, a toe guide member formed with a guide surface for guiding a nail is urged so as to enter the injection path of the contact nose and is rotatably attached .
A notch is formed on the inner surface of the contact nose to allow the foot tip guide member to enter,
The nailing machine according to claim 1, wherein a width of the notched wall portion is formed so as to be gradually reduced in a driving direction . The minimum width of Ketsukabe unit may less than the minimum head diameter of the nail which can be used in the nailing machine, the nailing machine according to claim 1, wherein. The nailing machine according to claim 1 or 2 , wherein a maximum width of the missing wall portion is equal to an inner diameter of an injection path of the contact nose. The nailing machine according to any one of claims 1 to 3 , wherein the guide surface of the toe guide member is formed such that the lower part is narrower than the upper part.

Images