JP2000198085A - Contact arm for nailing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate a change of compact arms in dependent upon an object. SOLUTION: In a contact arm 30 for a nailing machine, an ejection button for a nailing power source is located in the vicinity of a trigger. When the ejection button is depressed by pulling the trigger, an ejection nozzle is made into contact with a position in the vicinity of an object to be nailed so as to detect such a fact that the nozzle is located in the vicinity of the object to be nailed, and accordingly, the operation for pulling the trigger can be effectively transmitted. In this arrangement, an arm part 31 for transmitting the operation for pulling the trigger to the ejection button is removably and changeably coupled to a guide part 32 adapted to make contact with a position in the vicinity of an object to be nailed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nail driving device which detects that a nozzle for firing a nail of a nail driving machine is located at a site to be nailed, and makes a pulling operation of a nail driving trigger effective. Machine contact arm.

[0002]

2. Description of the Related Art Conventionally, a nailing machine has been provided with a nailing target near a firing nozzle in order to detect that a firing nozzle for driving a nail when pulling a nailing trigger is located at a site to be nailed. A contact arm is provided for contacting the site.

FIG. 9 shows a configuration near a trigger of the nailing machine. Behind the trigger 2 of the nailing machine 1,
A starting valve 3 serving as a nail firing button is arranged, and a safety lever 4 is pivotally supported inside the lower portion of the trigger 2. The trigger 2 rotates about the fulcrum 5, and the safety lever 4 is
It is rotatable around a fulcrum 6 provided at the lower part.

A cylindrical spring receiving member 7 is provided in front of the trigger 2.
Are arranged, and a spring 8 is arranged between the spring receiving member 7 and the trigger 2. Further, an L-shaped pressing piece 9 that penetrates the lower portion of the spring receiving member 7 and contacts the upper end of the safety lever 4 is disposed inside the spring receiving member 7.

[0005] A spring 11 is interposed between the vertical plate portion 10 of the pressing piece 9 and the spring receiving member 7 to urge the pressing piece 9 forward. The safety lever 4 has a helical spring formed in the lower part, and the free end side of the safety lever 4 has a pressing piece 9.
It is urged in the direction of contact. Vertical plate part 1 of pressing piece 9
0, a connecting member 13 having a fixed shaft 12 at the front.
Are arranged, and the vertical plate portion 10 is hung on the locking piece 14 of the connecting member 13. The arm 15 of the contact arm 15 is locked to the fixed shaft 12.

The arm portion 16 of the contact arm 15
The contact arm 15 is set so that it is curved in a U-shape and the fixed shaft 12 is held inside the curved portion. The contact arm 15 is bent in an S-shape from an arm portion 16 fixed to the fixed shaft 12, rises upward, and then extends straight ahead of the nailing machine 1.

At the front end of the contact arm 15, there is formed a ring-shaped guide portion 17 which comes into contact with the vicinity of the nailing target portion. The guide unit 17 is located in front of the firing nozzle 18 that fires a nail, determines a target of the nailing target site, and detects that the guide unit 17 is in contact with the vicinity of the nailing target site, The pull-in operation of the nailing of the trigger 2 is made effective.

That is, when the guide portion 17 is not in contact with the nailing target portion, the connecting member 13
1, the pressing piece 9 is located at the front position. For this reason, the safety lever 4 is tilted forward, and even if the trigger 2 is pulled, the activation valve 3 cannot be pressed, the retraction operation of the trigger 2 is invalidated, and the nail is fired from the firing nozzle 18. Is prevented.

When the guide portion 17 comes into contact with the nailing target portion and the arm portion 16 pushes the connecting member 13 backward, the safety lever 4 falls backward and the starting valve 3 can be pressed, and the trigger 2 is retracted. Is valid. Trigger 2
, The activation valve 3 is pushed via the safety lever 4,
The compressed air enters the chamber 19 of the nailing machine 1 and moves the piston 20 forward, and the driving pin 21 attached to the piston 20 moves forward and the firing nozzle 18
Fire nails from.

[0010]

By the way, when performing the interior work using such a nailing machine 1, there are various operations such as nailing a gypsum board and stopping a tie. It is necessary to change the tip shape of the contact arm 15 between the case where the nail is driven into the gypsum board and the case where the nail is driven to fix the tying member.

However, in the conventional contact arm, since the whole is one part, there has been a problem that replacement and detachment thereof are troublesome.

The contact arm of the nailing machine according to the present invention has been made in view of such a problem.
An object of the present invention is to provide a contact arm of a nailing machine in which a contact arm can be easily replaced depending on a nailing target and a nailing depth can be easily adjusted as required.

[0013]

In order to solve the above-mentioned problems, the contact arm of the nailing machine according to the first aspect of the present invention is designed so that when the nailing trigger is pulled and the nailing firing button is pressed. A contact arm of a nailing machine that contacts the nailing target portion and effectively transmits the operation of pulling the trigger to the firing button, wherein the contact arm performs the operation of pulling the trigger on the firing button. The transmitting arm and the guide contacting the nailing target portion are detachably connected to each other.

According to a second aspect of the present invention, there is provided a contact arm for a nailing machine, wherein the arm portion of the contact arm and the guide portion are adjustable in length. It is characterized by having.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A contact arm of a nailing machine according to an embodiment of the present invention will be described below with reference to the drawings. Note that portions other than the contact arm are the same as those in the related art, and the description thereof will be referred to.

FIG. 1 shows a contact arm 30 according to this embodiment. The contact arm 30 includes an arm part 31 and a guide part 32. The arm section 31 includes a transmission section 33 that contacts a step 13A between the connecting member 13 and the fixed shaft 12 shown in FIG. The transmission unit 33 moves to the left side in FIG. 1 to push the step 13A, and tilts the safety lever 4 toward the valve 3. The arm part 31 extends from the transmission part 33 to the outside of the nailing machine 1 main body, and then extends forward of the nailing machine 1 along the firing nozzle 18. The upper end of the arm portion 31 is a flat plate portion 34, and a connection hole 35 is opened in the flat plate portion 34, as shown in FIGS. The connection hole 35 is a long hole extending in the front-rear direction, so that the mounting position of the guide portion 32 in the front-rear direction can be adjusted. As shown in FIG. 4, a tooth row 36 for length adjustment protrudes from the lower surface of the flat plate portion 34. Flat plate part 3
A rectangular fitting part 37 protrudes from the front end of the fourth member 4.

As shown in FIG. 6, the guide portion 32 has a ring-like shape which serves as a contact portion between the flat plate portion 39 fastened to the flat plate portion 34 of the arm portion 31 by the bolt 38 and the aiming of nailing and the material to be driven. And an aiming unit 40. A screw hole 41 into which the bolt 38 is screwed is formed in the flat plate portion 39. As shown in FIG. 8, the arm 3 is provided on the upper surface of the flat plate 39.
A tooth row 42 meshing with the first tooth row 36 is protrudingly provided.
The amount of protrusion of the guide portion 32 from the firing nozzle 18 is determined by adjusting the positions of the guide portion 32 and the tooth row 42.

A pair of protrusions 43, 43 for positioning the fitting portion 37 of the flat plate portion 34 therebetween in front of the flat plate portion 39.
Are protruding. The pair of projections 43, 43
When 0 is pressed in contact with the nailing target portion, the pressing force is transmitted to the entire flat plate portion 34 of the arm portion 31 and the load on the bolt 38 is reduced.

When the aiming portion 40 comes into contact with the nailing target portion in the mounted state shown in FIG. 9, the contact arm 30 applies a pressing force applied to the aiming portion 40 via the transmitting portion 33 of the arm portion 31 to the connecting member 13. Is transmitted to As a result, the connecting member 13 moves to the rear of the nailing machine 1, and the rear end of the pressing piece 9 tilts the safety lever 4 toward the valve 3, and effectively transmits the retracting operation of the lever 2 to the valve 3.

When the aiming section 40 is not in contact with the nailing target portion, the connecting piece 13 is urged forward of the nailing machine 1, so that the pressing piece 9 is in the forward position. When the trigger 2 is pulled, the retracting operation of the trigger 2 is not effectively transmitted to the safety lever 4, and the retracting operation of the trigger 2 is invalid. Is done.

When the aiming portion 40 of the contact arm 30 is pressed against the nailing target portion by contact, the amount of projection of the aiming portion 40 from the firing nozzle 18 keeps the distance between the firing nozzle 18 and the nailing target portion constant. Will be maintained. Accordingly, the nail driving depth can be adjusted by adjusting the projection amount of the aiming portion 40.

In this contact arm 30, the bolt 3
By loosening and removing 8, the flat plate portion 39 of the guide portion 32 can be removed from the flat plate portion 34 of the arm portion 31. For example,
When changing the work content from nailing a gypsum board to nailing a metal plate, replace the guide with a metal plate guide. When it is desired to adjust the nail driving depth when replacing the guide portion, the flat plate portion 39 of the replaced guide portion 32 and the flat plate portion 34 of the arm portion 31 are overlapped at an appropriate position, and the bolt 38 is lengthened. Lightly screw into the screw hole 41 of the flat plate portion 39 through the hole 35. Thereafter, the engagement between the tooth row 36 and the tooth row 42 is adjusted so that the nail driving depth is adjusted to a desired depth, and the bolt 38 is tightened. When finely adjusting the nail driving depth during nailing, use a bolt 3
8 is loosened, the positions of the tooth rows 36 and 42 are adjusted again along the elongated hole 35, and the bolt 38 is tightened again.

As described above, even when the nail driving depth is changed and adjusted according to the material of the nailing target portion, only the guide portion 32 is replaced without replacing the entire contact arm 30. In addition, the exchange work is easy, and if the guide portions 32 are variously arranged, not only the nailing operation according to various building materials can be performed, but also in the case where only one guide portion 32 is provided, 36,4
The nail driving depth can be easily changed by adjusting the meshing position.

[0024]

According to the contact arm of the nailing machine of the first aspect of the present invention, since the arm portion connected to the trigger of the contact arm and the guide portion are formed separately, the nailing target can be formed. For example, even when changing from a gypsum board to a tie, it can be easily replaced, eliminating the hassle of attaching and detaching.

According to the contact arm of the nailing machine of the second aspect of the present invention, in addition to the effect of the first aspect, by adjusting the amount of forward projection of the guide portion, the driving depth at the time of nailing can be reduced. It can be changed, and even if the nailing machine is provided with a normal driving depth adjusting mechanism, it becomes possible to use the nailing machine for a special use beyond the adjustment range.

Therefore, when nailing a gypsum board, it is possible to hammer the nail with a hammer or the like after nailing the nail to a certain depth and leaving the head of the nail floating. It is possible to prevent a strong impact on the board and prevent the nail from being excessively inserted.

[Brief description of the drawings]

FIG. 1 is a diagram showing an entire configuration of a contact arm according to an embodiment of the present invention;

FIG. 2 is a plan view of an arm unit shown in FIG. 1;

FIG. 3 is a side view of the arm portion shown in FIG.

FIG. 4 is a partial view showing a configuration of a tooth row on a lower surface of the flat plate portion in FIG. 2;

FIG. 5 is an enlarged view of the dentition of FIG. 4;

FIG. 6 is a plan view of a guide portion of the contact arm of FIG. 1;

FIG. 7 is a view showing an aiming unit of the guide unit of FIG. 6;

FIG. 8 is an enlarged view of a row of teeth formed on a flat plate portion of the guide portion of FIG. 6;

FIG. 9 is a schematic view showing the entire configuration of a nailing machine.

[Explanation of symbols]

 REFERENCE SIGNS LIST 30 contact arm 31 arm portion 32 guide portion 33 transmitting portion 34 flat plate portion 35 long hole 36 tooth row 38 bolt 39 flat plate section 40 aiming section 41 screw hole 42 tooth row 43 projection

Claims (2)

[Claims] When a nailing trigger is pulled and a nailing firing button is depressed, the nailing touches the nailing target portion and effectively transmits the triggering operation to the firing button. The contact arm of the machine, wherein the contact portion is configured such that an arm portion that transmits the operation of pulling the trigger to the firing button and a guide portion that contacts the nailing target portion are detachably connected. A contact arm for a nailing machine. 2. A contact arm for a nailing machine according to claim 1, wherein said arm portion of said contact arm and said guide portion are adjustable in length. .