JPH0354867Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a nailing tool for driving nails such as stables.

(Prior art) As the conventional technology, Japanese Utility Model Application Publication No. 177284/1984,
There are publications such as Utility Model Application Publication No. 59-148282.

(Problem to be solved by the invention) Conventional nailing tools equipped with a driving depth adjustment function to adjust the driving depth of the nail do not have a safety mechanism and a nailing operation mechanism to prevent incorrect nail driving operations. There was a problem in that the driving depth adjustment mechanism and the safety mechanism could not be used together because it was impossible to adjust the linked operation.

An object of the present invention is to provide a nailing tool that solves the above problems.

(Means for solving the problem) The nailing tool of the present invention has a depth guide formed on the lower surface of the magazine case of the nailing tool so that it can be elastically bent and extended toward the nail driving surface side. Near the front end of this depth guide, an adjuster press-contacted to the lower surface of the magazine case is installed so as to be able to rotate horizontally. A plurality of engaging grooves are formed in a stepped shape to selectively engage with the locking claws to gradually expand and contract the ejection gap between the surface to be driven and the ejection surface, and the tip thereof is formed on the surface to be driven. A safety lever whose distal end protrudes below the driving surface and is installed to be movable up and down so as to move upward when pressed, and a plate-shaped plate connected to a trigger valve that operates to drive the nail. and the adjuster lever, with the vicinity of the upper end of the safety lever superimposed on a part of the adjuster lever, and the distance between the tip of the safety lever and the launch surface is the minimum selected by the rotational operation of the adjuster. A safety member is formed by being connected with a bolt so that it can be expanded and contracted in the vertical direction so as to be set within the range from the punching gap to the maximum punching gap, and further,
A connecting portion between the safety lever and the adjuster lever is provided with a scale for aligning the two levers.

(Function) A locking pawl formed on the depth guide attached to the bottom surface of the magazine case and a plurality of engagement grooves formed on the adjuster attached near the front end of the depth guide are used to horizontally rotate the adjuster. The driving depth of the nail is adjusted by selectively engaging with the driving surface and the nail driving surface by gradually expanding and contracting the driving gap between the driving surface and the driving surface of the nail. A safety member connected to a safety lever that presses against the driving surface and retracts is adjusted for expansion and contraction using a scale provided at the connecting portion of both levers, and the amount of displacement of the safety member is adjusted to match the driving depth of the nail. To properly operate a trigger valve by preventing malfunction of the trigger valve or inoperability of the trigger when adjusting and changing the driving depth of a nail.

(Embodiment) Next, an embodiment of the present invention will be described with reference to the drawings. In the figure, 1 is a housing of the main body H of the nailing tool, and 2 is a housing that can move up and down with respect to the front end 1a of the housing 1. Internally installed piston, 3 is piston 2
A driver 4 connected to the lower end of the housing 1 is a driver guide connected below the front end 1a of the housing 1, and a nail path 4a through which the driver 3 is inserted to drive a nail downward. A nail driving surface 5 is formed on the lower end surface of the nail.

Reference numeral 6 denotes a magazine case placed horizontally behind the driver guide 4 to accommodate nails, and is suspended horizontally between the driver guide 4 and the lower end of the rear end of the main body H, and has a fixing surface 7 on its lower surface. is formed horizontally facing the surface W to be driven.

8 is for adjusting the driving depth of the nail by expanding or contracting the driving gap M formed between the driving surface W and the driving surface 5 according to the material, hardness, etc. of the driving surface W. In the adjustment mechanism A, the depth guide is attached to the vicinity of the rear end of the fixed surface 7 in a cantilevered manner and extends forward so as to be elastically flexible, and is disposed slightly rearward of the ejection surface 5. The lower surface near the front end 8a has a driving surface W.
A movable surface 9 for making contact with the fixed surface 7 is parallel to the fixed surface 7 and is formed to be elastically displaceable in the vertical direction,
A protrusion 8b that protrudes slightly upward is formed near the front end 8a, and a fitting hole 8c is formed in this protrusion 8b.
is passed through vertically, and a pair of left and right locking pawls 10, 10 are provided rotationally symmetrically on both sides of the upper surface of the protrusion 8b.

11 is rotatable on the protrusion 8b of the depth guide 8 in order to come into pressure contact with the fixed surface 7 of the magazine case 6 and elastically expand or contract the distance k between the fixed surface 7 and the movable surface 9 of the depth guide 8. The adjuster 11 is seated on an adjuster, and a shaft portion 11b for supporting the adjuster 11 in a horizontally rotatable manner protrudes from the lower side of a disc-shaped knob portion 11a that is in contact with the fixing surface 7 of the magazine case 6. The fitting hole 8c of the depth guide 8
is inserted into.

A movable surface 9 is provided on the lower surface of the knob portion 11a that selectively engages with both locking claws 10 of the depth guide 8.
In order to vertically displace the movable surface 9 in stages with the upper limit being the position where the movable surface 9 is disposed in the same plane as the ejection surface 5, the movable surface 9 is recessed in a substantially V-groove shape with a predetermined step difference d to d, and each 180 mm. An appropriate number of pairs of meshing grooves 12 to 12 arranged rotationally symmetrically in degrees are arranged radially with respect to the rotating direction, and the meshing grooves 12 mesh with both locking pawls 10 by rotating the adjuster 11 When the movable surface 9 of the depth guide 8 is moved up and down, the ejection gap M between the movable surface 9 and the ejection surface 5 is increased.
is expanded or contracted in stages, and the driving depth of the nail into the material to be driven can be adjusted.

Reference numeral 15 denotes a front end portion 1 of the housing 1 for driving and controlling the piston 2 by switching the compressed air flow path.
This is a trigger valve that protrudes slightly to the rear of a so as to be able to move upward.

Reference numeral 16 denotes a trigger pivotably supported on the rear surface of the front end portion 1a of the housing 1 to face the trigger valve 15 for pushing up and releasing the trigger valve 15, and 17 denotes the rear end of the trigger 16. The idler is pivotably supported relative to the vicinity, and when the front end of the idler 17 is pushed up and the trigger 16 is pulled, the idler 17 pushes up the trigger valve 15 and advances the piston 2. be able to.

Reference numeral 18 denotes a safety member that is movable forward and backward in order to control the swinging of the idler 17 and prevent erroneous nail driving operations, and is divided into upper and lower parts, with an upper adjuster lever 19 and a lower safety lever 20 arranged vertically. They are connected so that they can be adjusted in both directions. The adjuster lever 19 is vertically positioned below the trigger 16 so that its upper end passes through the vicinity of the front end of the trigger 16 and is in contact with the lower surface of the front end of the idler 17.
The safety lever 20 has a vertical piece 20a vertically installed at its front end, and the vertical piece 20a is extended laterally at right angles to the vicinity of the center thereof and bent rearward, and further, the vicinity of the rear end is bent upward. The arm piece 20b is provided with a vertical guide groove 22a which is attached to the driver guide 4 in the vicinity of its front end and is vertically provided in the central part, and a horizontal guide groove 22a which is connected to one side of the central part of the vertical guide groove 22a. A guide plate 2 having a guide groove 22b recessed therein.
2 and the driver guide 4, and is always biased downward by a spring 24, which is clamped between the upper end of the driver guide 4 and the upper end of the guide plate 22. The vicinity of the lower end of the safety lever 20 is projected below the driving surface 5 so as to retract upward when the safety lever 20 comes into pressure contact with the surface W to be driven, and the arm piece 20b of the safety lever 20 is attached to a guide plate. The lower end of the safety lever 20 is defined by contacting the lower end surface 26 of the horizontal guide groove 22b of 22.

In addition, Asia Streva 19 and Safety Lever 2
0 is connected to the adjuster lever 19 so that it can be expanded and contracted through a bolt 23 that passes through an adjustment hole 19a extending vertically through the vicinity of the lower end of the adjuster lever 19 and is screwed to the upper end of the safety lever 20, and is displayed on the adjuster lever 19. The expansion and contraction can be adjusted by aligning the scale 25 with the upper edge of the safety lever 20.

When adjusting the expansion and contraction of the adjuster lever 19 and the safety lever 20, the distance between the tip 21 of the safety lever 20 and the ejection surface 5 when the trigger valve 15 is activated by the retraction of the safety lever 20 is set to S.
Then, this distance S, that is, the amount of displacement when the safety lever 20 is retracted, is set to the maximum ejecting gap Mmax so that even if the ejecting gap M increases or decreases, the adjuster lever 19 is displaced by a distance that accurately operates the trigger valve 15. The settings are as follows, and the trigger is 16
When activating the trigger lever 15 by hitting the safety lever 20 against the surface W to be driven after pulling the trigger valve 15, prevent abnormal operations such as an abnormal return operation of the piston 2 or a shift in nail driving timing due to incorrect operation of the trigger valve 15. The adjustment lever 19 and the safety lever 2 are set within the range of optimum values Smin to Smax to define the optimum operating conditions of the trigger valve 15.
By adjusting the connection length with 0, the distance S can be set to a value between the maximum ejection gap Mmax and the upper limit Smax of the optimum range of the distance S.

Next, the operation and effects of the embodiment having the above configuration will be explained.

In this example, a depth guide 8 is attached in a cantilevered manner to the lower surface of the magazine case 6 of the nailing tool, which is formed to be elastically bendable and extends toward the nail driving surface 5 side.
An adjuster 11 that is pressed against the lower surface of the magazine case 6 is installed near the front end of the depth guide 8 so that it can be rotated horizontally. A plurality of engagement grooves 12 are formed in a stepped shape to selectively engage with the retaining pawl 10 to gradually expand and contract the ejection gap M between the surface W to be driven and the ejection surface 5, and the tip thereof is shaped like a step to be driven. A safety lever 20 is installed in which the vicinity of the tip protrudes downward from the driving surface 5 and is movable up and down so as to retract upward when pressed against the surface W, and a trigger valve 15 that operates to drive the nail. With the linked plate-shaped adjuster lever 19 overlapped with the vicinity of the upper end of the safety lever 20 on a part of the adjuster lever 19, the distance between the tip of the safety lever 20 and the ejection surface 5 is determined by the rotational operation of the adjuster 11. The bolt 23 is set within the range from the minimum punching gap to the maximum punching gap selected accordingly.
A safety lever 20 is connected to the safety member 18 so as to be extendable and contractible in the vertical direction.
A scale 25 for aligning the two levers 20, 19 is provided at the connecting portion between the lever and the adjuster lever 19.

Therefore, by adjusting the expansion and contraction of the adjuster lever 19 and the safety lever 20, the function to prevent erroneous nail driving operations is ensured, and the installation conditions of the safety lever 20 for properly operating the trigger valve 15 can be easily and accurately set. Even when the safety member 18 and the nailing depth adjustment mechanism A are used together, the problem of incorrectly operating the trigger valve 15 when the safety lever 20 is retracted can be eliminated, and the optimum operating conditions of the trigger valve 15 can be ensured. There is.

Also, after assembling the safety member 18, both levers 1
Since the connection state of 9 and 20 can be adjusted, it is no longer necessary to maintain the assembly accuracy of the safety member 18 required for proper operation of the trigger valve 15, and the number of steps for assembling the safety member 18 can be simplified. There is.

(Effects of the invention) Since the present invention is constructed as described above, it is possible to accurately and easily adjust the nail driving depth with a single touch, and even if the nail driving depth is adjusted, the trigger valve cannot be adjusted properly. The appropriate amount of retraction displacement of the safety member to be activated can be easily selected according to the driving depth of the nail, preventing the trigger from becoming inoperable after adjusting the driving depth, and improving the safety member. It always operates properly and has the effect of safely performing the nail driving operation at the set nail driving depth.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a partially cutaway side view of the nailing tool, Fig. 2 is an enlarged side view of the adjuster, and Fig. 3 is a cross-sectional view taken along the line X--X in Fig. 1. Similarly, FIG. 4 is a sectional view taken along the Y-Y line, FIG. 5 is a sectional view taken along the Z-Z line in FIG. 4, and FIG. 6 is an enlarged side view of the main parts. 5...Ejection surface, 15...Trigger valve, 19...
...Adjustment lever, 20...Safety lever,
M...Dumping gap, W...Dumped surface.

Claims (1)

[Scope of utility model registration request] A depth guide is attached to the lower surface of the magazine case of the nailing tool in a cantilevered manner, which is formed to be elastically deformable and extends toward the nail driving surface side. An adjuster press-welded to the lower surface is mounted so that it can be rotated horizontally, and when the adjuster is rotated horizontally, it selectively engages with a locking pawl formed on the depth guide, thereby connecting the driven surface and the depth guide. A plurality of engagement grooves are formed in a step-like manner to gradually expand and contract the ejection gap between the ejection surface and the ejection surface, and the vicinity of the tip is retracted upward when the ejection surface comes into pressure contact with the ejection surface. A safety lever that is protruded downward and is installed to be movable up and down, and a plate-shaped adjuster lever that is linked to a trigger valve that is operated to drive a nail are placed so that the upper end of the safety lever overlaps a part of the adjuster lever. In this state, the bolt is set so that the distance between the tip of the safety lever and the ejecting surface is set within the range from the minimum ejecting gap to the maximum ejecting gap selected by rotating the adjuster. Therefore, the safety member is formed by connecting the levers so that they can be expanded and contracted in the vertical direction, and further, a scale is provided at the connecting portion of the safety lever and the adjuster lever for aligning the two levers. Nailing tool.