JP2005335035A - Nailing machine equipped with depth adjusting mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a nailing machine free from the strength dispersion of a thread part caused by conventional welding, improved in weight reduction and strength stability and reduced in a manufacturing cost. <P>SOLUTION: The nailing machine is provided with: a blade interlocked with a piston part; a nose ejection part guiding the reciprocating motion of the blade and having a nose ejection port at the tip; a magazine for supplying a connecting nail to the nose ejection part; a trigger part for controlling the reciprocating operation of a piston part; and a push lever part comprising an upper push lever and a lower push lever screwed through an external thread and an internal thread 31c. The lower push lever 31 has an internal thread part 31c screwed with the upper push lever, at the end, and a push lever body part 31b extending continuously from the internal thread part. The internal thread part 31c and the push lever body part 31b are integrally formed by press-forming method using a single plate member. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a nailing machine, and more particularly, to a nailing machine including a depth adjusting mechanism for controlling a driving depth by cooperation of a trigger lever operation and a push lever pressing operation.

  In general, a nailing machine has a blade that strikes a nail in conjunction with a reciprocating motion of a piston portion in the main body, and a nose injection port that is provided on the lower side of the main body and guides the reciprocating motion of the blade to drive the nail. A nose injection part, a magazine which is mounted on the main body so as to be engaged with the nose injection part and supplies a connection nail to the nose injection part, and a trigger lever and a trigger valve for controlling the start of reciprocation of the piston part A trigger part and a push lever extending from the outer peripheral part near the nose injection part to the vicinity of the trigger valve of the trigger part are provided. In order to prevent malfunction of the nailing machine and to ensure safety, in particular, by the cooperation of both the operation of the trigger lever and the pressing operation of the push lever (or a member also called a contact arm) to the driven material. The nail driving operation based on the reciprocating motion of the piston portion is activated, and the nail driving depth is adjusted. Conventional nailers having such a push lever or contact arm are disclosed in, for example, Patent Documents 1 to 4 listed below.

  Conventionally, a push lever or a contact arm used in a nail driver needs to adjust the length of a nail and adjust the driving depth of a nail as shown in Patent Document 1 below. For this purpose, the push lever is processed by dividing it into two upper and lower pressure lever members, and both the upper and lower parts are screwed together, that is, screwed together at the intermediate portion of the entire pressure lever, and the screwing amount or fitting The length of the entire pressure lever has been adjusted by adjusting the amount (screwing amount).

  8 and 9 show an example of a conventional push lever, FIG. 8 is a side view thereof, and FIG. 9 is a top view seen from the direction of arrow B shown in FIG. The push lever 41 has a lower end portion 41a that fits and slides on the outer periphery of a nose injection portion of a nailing machine body (not shown). The main body of the lower push lever 41 itself is formed by punching and bending a plate-like metal material by a known press molding method, but a nut portion 42 for screw connection with the upper push lever (not shown). The nut member 42 in which the female screw is formed in the screwing direction is specially prepared, and this nut member 42 is integrally formed on the upper end portion 41b of the lower push lever member by a connecting portion 41c such as caulking or welding. It was.

JP 2000-334678 A

Japanese Patent No. 3137227 Japanese Patent No. 3137228 Japanese Utility Model Publication No. 60-117072

  However, a relatively thin push lever is used in order to ensure the strength of the connecting portion because other nut members made of a relatively large steel material are integrally formed by welding or caulking at the portion to be screwed and connected to the upper push lever. It is necessary to use a member, and to make a large welding margin or caulking margin of the nut member on the push lever member. Further, when connecting the tip of the push lever member and the nut member, it is necessary to align dimensions such as parallelism, and an alignment jig and a skilled worker are required. As a result, the weight of the completed push lever is increased, which is one factor that increases the weight of the nailing machine body, which is a problem for the operator. In addition, there is a problem that the manufacturing cost is increased.

  Accordingly, an object of the present invention is to provide a nailing machine that suppresses manufacturing costs, reduces the weight of the nailing machine, and achieves strength stability.

  The above and other objects and novel features of the present invention will become more apparent from the description of this specification and the accompanying drawings.

  According to the results of the study by the inventors of the present application, in the conventional configuration, the thickness of the member used for the push lever mainly takes into account the balance of strength, toughness, and formability required for the push lever. For example, since a relatively thin metal material such as 2.3 mm is used, it is possible to form the nut portion together with the push lever portion by using a single material member, and to ensure the strength of the nut portion. From the beginning it was believed to be difficult. In order to overcome this problem, the inventor of the present application examined the thickness of the plate-like material of the push lever of the nailing machine and the size of the through hole of the nut portion formed in the push lever. It has been found that a technique of forming a cylindrical shape from a plate-like member by a molding method, that is, a technique of forming a cylindrical shape by a generally known burring method can be applied to the formation of a push lever of a nailer. The present invention has been completed with the idea that the nut portion of the push lever can be formed of the same material member integral with the push lever by a burring method.

  Of the inventions disclosed in the present application, the outline of typical ones will be described as follows.

  (1) A nail driver according to the present invention is provided on a lower side of the main body, and a blade that strikes the nail in conjunction with a reciprocating motion of a piston portion in the main body, guides the reciprocating motion of the blade, and A nose injection portion having a nose injection port at the tip thereof, a magazine that is attached to the main body to be engaged with the nose injection portion, and that supplies a connecting nail to the nose injection portion, and a reciprocating operation of the piston portion A trigger lever having a trigger lever and a trigger valve for controlling the trigger, an upper push lever that extends from the outer peripheral portion in the vicinity of the nose injection portion to the vicinity of the trigger valve of the trigger portion, and is screwed together by a male screw and a female screw; A push lever having a lower push lever, and the trigger valve is operated by cooperation of a pressing operation of the push lever and an activation operation of the trigger lever. In the nailing machine, the lower push lever of the push lever has a female screw portion screwed into the upper push lever at an end portion and a push lever main body portion extending continuously from the female screw portion, The screw portion and the push lever main body portion are integrally formed by a press molding method using a single plate-like member.

  (2) In the nailing machine according to item (1) according to the present invention, the internal thread portion is processed into a cylindrical portion formed by burring processing of the push lever main body portion and a single plate-like member. It is a screw.

  (3) In the nailing machine according to the item (2) according to the present invention, the upper push lever is rotated to give an upper push lever to adjust the entire length of the push lever. And an adjuster for adjusting the screwing amount between the lower push lever and the lower push lever.

  According to the nailing machine of the present invention, the female screw part and the lever part of the push lever are integrally formed as a single part by a press molding method using a single plate-like member. It is possible to provide a nailing machine that reduces the weight of the presser and reduces the weight of the presser lever and that stabilizes the strength of the push lever.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiments, and the repetitive description thereof will be omitted.

  FIG. 1 is an overall cross-sectional view of a nailing machine according to an embodiment of the present invention. 2 to 5 are partial sectional views showing a push lever portion constituting the nailing machine shown in FIG. 1, and FIGS. 6 and 7 are a side view and a partial sectional view of a push lever body according to the present invention, respectively. Show.

  In the nailing machine 1 of the present invention, compressed air from a compressor (not shown) is accumulated in the pressure accumulating chamber 3 in the nailer body 2 via an air hose (not shown). A cylindrical cylinder 4 is provided at the center of the nailing machine body 2, and a piston 5 is provided in the cylinder 4 so as to be slidable up and down. The piston 5 has a piston portion 5a and a driver blade portion 5b integrated with each other, and a tip portion 5c drives a head of a nail 6 arranged in a connected manner in a magazine described later. A main valve portion 10 to be described later is provided above the cylinder 4 and controls the reciprocating operation of the piston 5. The main valve unit 10 is controlled by a trigger valve unit 20 including a trigger valve 20a. That is, the trigger valve unit 20 conducts or blocks compressed air to the main valve control passage 19. Further, the trigger valve unit 20 is controlled by an operation unit 30 including a trigger 27, an arm plate 28, and a push lever unit 29. A nose injection portion 7 for guiding the blade portion 5b when the driver blade portion 5b is moved downward in the axial direction is provided at the lower portion of the cylinder 4, and a workpiece 8 such as wood is provided from the nose injection port 7a. Make nails out. Further, according to the present invention, in order to prevent malfunction of the nailing machine body 2 and to ensure safety, a push lever portion extending from the outer peripheral portion in the vicinity of the nose injection portion 7 to the vicinity of the trigger valve 20a of the trigger valve portion 20 is provided. 29 is provided. As will be described later, the reciprocating operation of the piston portion 5a is activated and the nail driving depth is adjusted by the cooperation of both the pressing operation of the push lever portion 29 to the driven material and the pulling operation of the trigger 27. To do. Hereinafter, the mechanism of each part and other mechanisms will be described in more detail.

  The magazine 50 for supplying the nail to the nose injection part 7 is attached to the handle part 2a which is a part of the nail driver main body 2 by the attachment part 51 so that one end of the magazine 50 is engaged with the nose injection part 7. The For the mounting portion 51 between the handle portion 2a and the magazine 50, an attachment arm 52 secured to the housing portion of the magazine 50 by two sets of bolts and nut fasteners 53 and 54 is used. The mounting arm 52 is attached to the handle portion 2a which is a part of the nailing machine main body 2 by bolts and nuts 55. The connecting nail 6 loaded in the magazine 50 is supplied to the nose injection unit 7 in response to the reciprocating motion of the piston 5. The supply of the connecting nail 6 to the magazine 50 is performed from the loading port 50 a opened at the end surface of the magazine 50.

  The inner diameter of the cylinder 4 is slightly larger than the outer diameter of the piston portion 5a so that the piston portion 5a can easily move up and down. The piston portion 5a is provided with a groove, and a well-known O-ring 9 made of a flexible material such as rubber is provided in the groove to seal the inner periphery of the cylinder 4 and the piston portion 5a.

  A main valve portion 10 is provided at the upper end portion of the cylinder 4. The main valve portion 10 is disposed above the main valve 11, the main valve rubber 12 fitted above the cylinder 4, the main valve spring 13 urging the main valve 11 toward the bottom dead center, and the cylinder 4. 4 includes an exhaust rubber bar 15 that shuts off the air passage 14 for exhausting the compressed air in the upper chamber of the piston portion 5a by contact with the main valve 11. The air passage 14 communicates with the atmosphere through an exhaust hole 17 and an exhaust passage 18 provided in the upper portion of the frame 16. At the top dead center of the main valve 11, the upper end of the main valve control passage 19 is closed on the upper end side of the main valve. A lower end portion of the main valve control passage 19 communicates with an air chamber provided in the trigger valve portion 20.

  When the main valve 11 is raised, the upper end of the cylinder 4 is opened, the upper chamber of the piston portion 5a is communicated with the pressure accumulating chamber 3, the exhaust rubber 15 is closed, and the air passage 14 is connected to the piston portion 5a. Shut off from the upper chamber. Conversely, when the main valve 11 is lowered by the compressed air from the main valve control passage 19, the upper end of the cylinder 4 is closed and the exhaust bar 15 is opened, so that the upper side of the piston portion 5a in the cylinder 4 communicates with the atmosphere. The main valve 11 is controlled by a trigger valve portion 20 provided at the other end of the main valve control passage 19.

  The operation unit 30 includes a trigger 27 that is operated by an operator, an arm plate 28 that is rotatably attached to the trigger 27, and an arm plate that protrudes from the lower end of the nose injection unit 7 and engages the arm plate 28. And a push lever portion 29 extending to the vicinity of 28. The end portion of the push lever portion 29 located on the nose injection portion 7 side is slidable in the vertical direction along the outer periphery of the nose injection portion 7, and when the push lever portion 29 is not operated, the nose injection portion 7 is biased downward by a push lever spring 37.

  Next, the structure of the push lever part 29 and the operation part 30 according to the present invention will be further described.

  As shown in FIG. 2 or 4, the push lever portion 29 includes a lower push lever 31 and an upper push lever 32.

  As shown in FIG. 1, the lower end 31a of the lower push lever 31 is in contact with the workpiece 8 such as wood, and the pressing operation makes the nose injection unit 7 slide on the outer periphery of the nose injection port 7a. It is mated. On the other hand, the main body portion 31b at the upper end of the lower push lever 31 has a cylindrical portion formed by processing a female screw 31d in a cylindrical portion formed by burring a single plate-like member integrated with the main body portion 31b. 31c.

  A lower push lever 31 according to the present invention is shown in FIGS. 6 is an overall view, and FIG. 7 is a partial cross-sectional view. The lower push lever 31 according to the present invention includes a lower end 31a pressed against the workpiece 8, a plate-like main body 31b that is a first plate extending upward from the lower end 31a, and a horizontal from the upper end of the main body 31b. A plate-like extension part 31e which is a second plate extending in the direction, a cylindrical part 31c extending downward from the extension part 31e, and a first screw part formed on the inner periphery of the cylindrical part 31c. A female screw 31d is provided. The diameter of the cylindrical part 31c is set to a dimension obtained by adding the inner diameter of the internal thread 31d and the dimension twice the thickness of the extending part 31e. The size of the extending part 31e is set to be larger than the outer diameter of the cylindrical part 31c so that the cylindrical part 31c can be accommodated in the extending part 31e with a surplus. The thickness of the extension part 31e and the cylindrical part 31c is set to be substantially the same as the thickness of the main body part 31b.

  The lower push lever 31 configured as described above is manufactured, for example, as follows. Since the manufacturing method of the lower end part 31a and the main-body part 31b is formed by press molding similarly to the past, description is abbreviate | omitted.

  The upper end of the main body 31b extends straight upward before molding. First, the upper end of the main body portion 31b is added to the inner diameter of the desired internal thread 31d and the thickness twice the thickness of the main body portion 31b, and further, the extra portion necessary for forming the cylindrical portion 31c described later is added. The part to which the dimensions are added is bent by a press molding machine. Thereby, the extending part 31e is formed. This stage is press molding.

  Next, the cylindrical portion 31c is formed. At this time, the lower portion (the tip portion 31a side) of the extending portion 31e is fixed to a pedestal having a hole slightly larger than the outer diameter of the cylindrical portion 31c. . A pilot hole smaller than the desired inner diameter of the female screw 31d is formed by a press molding machine at a position to be the center of the cylindrical portion 31c. At this time, a cylindrical tool (called a burring punch) having a lower end pointed in a conical shape and having an upper outer diameter substantially the same as the inner diameter of the desired female screw 31d is passed from above the prepared hole. Thereby, the cylindrical portion 31c is formed. This stage is called burring.

  Finally, the internal thread 31d is formed. A female screw 31d is formed by inserting a drill-like tool (called a tap) having a male thread shape to be screwed into a desired female screw 31d into the cylindrical portion 31c while being rotated. This stage is called tapping.

  According to such a configuration / manufacturing method, the lower push lever 31 can be formed of a plate-shaped metal material such as a single steel material. The plate-like material and the plate thickness thereof are determined in consideration of the weight reduction of the nailer, the manufacturing cost, and the balance between the material characteristics, that is, strength, toughness, and formability. For example, a relatively thin metal material such as 2.3 mm is used. By the burring method, the height of the cylindrical portion of the nut portion can be processed to, for example, about twice the plate thickness of the plate-like metal material, and the mechanical strength of the cylindrical portion and the lever portion main body is also stable. Things are obtained. A female thread portion that does not require a thicker plate thickness than the male thread portion is processed into this cylindrical portion.

  When the lower end portion 31a is pressed against the workpiece 8, a bending moment is applied to the inflection point between the main body portion 31b and the extending portion 31e. This bending moment is proportional to the distance between the main body 31b and the center of the cylindrical portion 31c. The conventional structure for welding the nut is relatively easy to ensure the strength by the large nut and the welded part, but the structure of the present invention is the female screw 31d by the relatively thin walled part 31e. Since it is the structure which connected the main-body part 31b, it needs to care about ensuring intensity | strength. In the configuration in which the conventional nut is welded, the distance between the body portion 31b and the center of the cylindrical portion 31c is about 12 mm. However, in the configuration of the present invention, this distance is set to about 8 mm or less. Equivalent strength is secured.

  According to the present invention, a structure using a push lever formed by a relatively thin plate-like member is used, so that weight reduction and strength stability can be achieved, and the manufacturing cost can be reduced.

  On the other hand, as shown in FIGS. 2 and 3, the upper push lever 32 is formed with a male screw at the lower end portion 32 a, and the male screw portion 32 a is connected to the female screw portion 31 d of the lower push lever 31. Screw together. The upper push lever 32 rotates in synchronization with the manual rotation of the adjuster 33 formed integrally therewith. Further, the push lever portion 29 has the following configuration. A first adjuster that is sandwiched between the adjuster 33 and the upper push lever 32, is urged and slid downward in the axial direction of the nose injection portion 7 by the first spring 39, and rotates in synchronization with the upper push lever 32. The plate 34, the adjuster 33, and the first adjuster plate 34 are clamped, urged and slid downward in the axial direction of the nose injection portion 7 by the first spring 39, and the push lever guide 35 is rotated without rotating. A second adjuster plate 36 slidable only in the axial direction along the guide groove 35 a, and is disposed above the adjuster 33 and the upper push lever 32, and a nose injection portion 7 by a push lever spring (second spring) 37. Is pushed downward in the axial direction, guided in the axial direction by the push lever guide 35, and the lower end is Contact with the push lever 32 and the adjuster 33, the upper end portion is formed from the top push lever 38. which is contactable with the arm plate 28.

  The adjuster plate 36 and the other adjuster plate 34 are combined by a latch provided with unevenness in the axial direction so that the adjuster 33 does not rotate freely due to vibration or impact force, and is engaged by a light pressing force of the spring 34. ing. When a force is applied to rotate the adjuster 33 against the spring 34, the latch repeatedly disengages and engages, and the adjuster 33 rotates with a click feeling.

  For adjusting the driving depth of the nail 6, when the adjuster 33 is rotated, the first adjuster plate 34 of the upper push lever 32 that is integrally connected rotates, and the lower push lever 31 is screwed with the lower push lever 31 that does not rotate. The relative position of the lever 31 and the upper push lever 32 in the axial direction changes. When the lower push lever 31 is set on the upper side, the position shown in FIG. 2 or 4 is obtained.

  As shown in FIG. 4, by adjusting the screwing position by the adjuster 33, the distance between the second adjuster plate 36 and the female screw portion 31d of the lower push lever can be adjusted to the shortest distance d1. When the entire push lever 29 is moved to the top dead center in this state, the distance from the lower end 31a of the push lever 29 to the tip 5c of the driver blade 5b at the bottom dead center is set to the long distance D1. As a result, the nail 6 is driven deeply into the workpiece 8.

  Opposite the position shown in FIG. 2 or FIG. 4, as shown in FIG. 3 or FIG. 5, by adjusting the screwing position by the adjuster 33, the second adjuster plate 36 and the cylindrical portion 31c of the lower push lever The distance can be adjusted to the longest distance d2. When the entire push lever 29 is moved to the top dead center in this state, as shown in FIG. 5, the distance from the lower end 31a of the push lever to the tip 5c of the driver blade 5b at the bottom dead center Can be a long distance D2, so that the nail 6 is driven shallowly into the workpiece 8.

  The trigger valve portion 20 has a pulling operation in the upward direction of the trigger 27 and an end portion of the nose injection portion 7, as will be apparent from the above description regarding the push lever portion 29 with reference to FIGS. 2 and 4. Is controlled via the arm plate 28 in cooperation with the pressing operation of the push lever portion 29 formed so as to slide on the outer periphery of the workpiece to the workpiece 8. That is, when it is desired to hit the nail 6 against the workpiece 8 such as wood, first, the push lever portion 29 is pressed against the workpiece 8, and then the trigger 27 is pulled upward. By these two operations, the arm plate 28 pushes up the trigger valve 20a of the trigger valve portion 20, and the trigger valve portion 20 closes the communication of the air passage between the main valve control passage 19 and the pressure accumulating chamber 3, and conversely the main valve The valve control passage 19 is communicated with the atmosphere from below the trigger valve portion 20.

  The trigger valve unit 20 and the main valve 11 are interlocked. When the trigger valve 20a moves upward, the main valve 11 rises, the main valve 11 comes into contact with the exhaust rubber 15, and the pressure accumulating chamber 3 and the air passage 14 are connected. Close the aisle. At the same time, the pressure accumulating chamber 3 communicates with the upper side of the piston portion 5a in the cylinder 4.

  A return air chamber 21 for returning the piston portion 5a from the bottom dead center to the top dead center is provided on the outer periphery of the lower end of the cylinder 4, and in the middle of the reciprocating stroke of the piston portion 5a, the return direction from the cylinder 4 toward the return air chamber 21 is provided. An air passage 23 having a check valve 22 that communicates only with the cylinder 4 is provided, and an air passage 24 that communicates the cylinder 4 with the return air chamber 21 is provided on the outer periphery of the lower end of the cylinder 4. A piston bumper 25 for absorbing excess energy of the driver blade 5b after the nail 6 is driven is provided at the lower end of the cylinder 4. The lower side of the piston bumper 25 is larger than the inner diameter of the cylinder 4 so as not to move to the top dead center side of the cylinder 4. The lower inner surface of the cylinder 4 has a tapered surface that expands in the direction of the bottom dead center, which is substantially the same as the outer shape of the piston bumper 25.

  Next, a driving operation by the nailing machine having the above configuration will be described with reference to FIG.

  First, a state in which an air hose (not shown) is connected to the compressed air intake port of the pressure accumulating chamber 3 in the nailing machine body 2 before driving is shown in FIG. The compressed air is accumulated in the pressure accumulating chamber 3. At this time, the piston 5 is at the top dead center in the cylinder 4, and the piston portion 5 a is guided to the cylinder 4 via the O-ring 9. The driver blade part 5 b is guided in the guide hole of the nose injection part 7.

  Next, by performing both the pressing operation of the push lever 28 against the wood 8 and the pulling operation of the trigger 27, the arm plate 29 operates to push the trigger valve 20a upward. As a result, the main valve 11 moves to the top dead center side, and the pressure accumulating chamber 3 communicates with the upper chamber of the piston portion 5a in the cylinder 4, whereby compressed air flows from the accumulating chamber 3 to the upper side of the piston portion 5a. . The piston portion 5a drives the nail 6 while rapidly moving to the bottom dead center by the compressed air that has flowed in. The piston 5 collides with the piston bumper 25 after driving the nail 6. The piston bumper 11 is deformed and absorbs excess energy of the piston 5.

  During the downward movement toward the bottom dead center of the piston 5, the air below the piston portion 5 a of the cylinder 4 and part of the compressed air above the piston portion 5 a are bidirectional with the air passage 23 having the check valve 22. The air flows into the return air chamber 21 through the air passage 24.

  Next, when the trigger valve 20a is returned by releasing the trigger 27, that is, returning the trigger 27 or stopping the pushing operation of the push lever 28 to the wood 8, the main valve 11 on the upper end side of the cylinder 4 is The air passage between the upper chamber of the piston 5 and the pressure accumulating chamber 3 is closed. Conversely, since the exhaust valve rubber 15 is opened, the upper chamber of the piston 5 communicates with the atmosphere through the vent hole 17. On the other hand, the lower side of the piston 5 of the cylinder 4 is pressed upward by the compressed air accumulated in the return air chamber 21, and the piston 5 suddenly moves to the top dead center in the cylinder. The air above the piston 5 of the cylinder 4 is released to the atmosphere via the exhaust hole 18 and returns to the initial state.

  By repeating the above steps, the nail 6 is sequentially driven into the wood (workpiece) 8.

  According to the present invention, a push lever structure in which the push lever main body and the screw portion are integrally formed by a relatively thin single plate-like member is formed, so that variations in the strength of the screw portion due to conventional welding are eliminated, and the weight is reduced. It is possible to provide a nailing machine that achieves greater stability and strength, and reduces manufacturing costs.

  Although the invention made by the present inventor has been specifically described based on the embodiments, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. Needless to say.

  In the embodiment of the present invention, the case where the lower push lever is formed with the cylindrical portion by the burring method and the female screw is formed has been described. However, the female screw portion may be applied to the screw portion of the upper push lever. it can.

1 is an overall cross-sectional view of a nailing machine according to an embodiment of the present invention. Sectional drawing which shows one adjustment form of the push lever part which comprises the nailing machine which is one embodiment of this invention. Sectional drawing which shows the other adjustment form of the push lever part which comprises the nail driver which is one embodiment of this invention. Sectional drawing at the time of operating a push lever part to a top dead center by the adjustment form shown in FIG. 2 of the push lever part which comprises the nail driver which is one embodiment of this invention. Sectional drawing at the time of operating a push lever part to a top dead center by the adjustment form shown in FIG. 3 of the push lever part which comprises the nail driver which is one embodiment of this invention. The side view of the push lever which comprises the nail driver which is one embodiment of this invention. The fragmentary sectional view which follows the AA line of FIG. 6 of the push lever which comprises the nailing machine which is one embodiment of this invention. The side view of the push lever in the conventional nailer. The top view seen from the B direction of FIG. 8 of the push lever in the conventional nailing machine.

Explanation of symbols

1 Nailing machine 2 Nailing machine body 2a Handle part (mounting part)
DESCRIPTION OF SYMBOLS 3 Pressure accumulating chamber 4 Cylinder 5 Piston 5a Piston part 5b Driver blade part 5c Blade tip part 6 Nail 7 Nose injection part 7a Nose injection port 8 Wood (workpiece) 9 O ring 10 Main valve part 11 Main valve 12 Main valve rubber 13 Main valve spring 14 Air passage 15 Exhaust rubber 16 Frame 17 Exhaust hole 18 Exhaust passage 19 Main valve control passage 20 Trigger valve portion 20a Trigger valve 21 Return air chamber 22 Check valve 23 Air passage (unidirectional)
24 Air passage (bidirectional) 25 Piston bumper 27 Trigger 28 Arm plate 29 Push lever part 30 Operation part 31 Lower push lever 31a Lower end part of the lower push lever 31b Lower push lever body part 31c Lower push lever cylindrical part 31d Lower push lever female thread 31e Lower push lever extension 32 Upper push lever 32a Upper push lever male thread 33 Adjuster 34 First adjuster plate 35 Push lever guide 36 Second adjuster plate 37 Push lever Spring 39 First spring 41 Lower push lever 41a Lower push lever lower end 41b Lower push lever upper end 42 Lower push lever nut member 50 Magazine 50a Magazine nail loading port 51 mounting portion 52 mounting arm 53 first bolt and nut fastener 54 second bolt and nut fastener 55 third bolt and nut fastener

Claims (5)

A blade that strikes the nail in conjunction with the reciprocating motion of the piston part in the body,
A nose injection part provided on the lower side of the main body, guiding the reciprocation of the blade, and having a nose injection port at the tip of which the nail is driven;
A magazine which is mounted on the main body so as to engage with the nose injection part and supplies a connection nail to the nose injection part;
A trigger unit including a trigger and a trigger valve for controlling the reciprocating motion of the piston unit;
A push lever that includes an upper push lever and a lower push lever that extend from the outer peripheral portion in the vicinity of the nose injection portion to the vicinity of the trigger valve of the trigger portion and are screwed together by a male screw and a female screw. A nailing machine for operating the trigger valve by cooperation of a lever pressing operation and a trigger lever activation operation,
At least one of the upper and lower push levers of the push lever has a female screw portion at an end thereof, and a push lever main body portion extending continuously from the female screw portion,
The nailing machine, wherein the female screw portion and the push lever main body portion are integrally formed by a press molding method using a single plate-like member.   2. The nailing machine according to claim 1, wherein the female screw portion is a screw for processing the push lever main body portion and a single plate-like member into a cylindrical portion formed by a burring method. .   In order to adjust the length of the entire push lever portion, the push lever is rotated by either one of the upper and lower push levers and the amount of screwing between the upper push lever and the lower push lever is adjusted. The nailer according to claim 1 or 2, wherein an adjuster is attached. A driver blade that strikes the fastener downward;
A drive unit for reciprocating the driver blade;
A nose injection part provided below the drive part for guiding the driver blade and the fastener;
A trigger unit for controlling the reciprocating operation of the drive unit;
A push lever provided so as to be vertically movable, a lower push lever having a first screw portion whose lower end can protrude below the nose injection portion and whose upper end extends in the vertical direction, and the first screw at a lower end A push lever having a second screw portion that is screwed to the portion, and an upper push lever whose upper end is engageable with the trigger lever,
The drive unit is configured to operate in cooperation with the activation operation of the trigger unit and the upward pressing operation of the push lever, and by adjusting the screwing amounts of the first and second screw units. In the nailing machine configured to be capable of adjusting the entire length of the push lever,
The lower push lever includes a first plate portion extending upward from a lower end;
A second plate portion extending horizontally from the upper end of the first plate portion;
A nailing machine comprising: a cylindrical portion extending upward or downward from the second plate portion; and a screw portion formed as the first screw portion on an inner periphery of the cylindrical portion. The nailing machine according to claim 4, wherein a distance between a center of the cylindrical portion and the first plate portion is 8 mm or less.

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