JPS6236623Y2 - - Google Patents

Description

[Detailed description of the invention] This invention allows the nails fed into the nail driving nose from the nail magazine provided at the bottom of the housing of the nail driving machine to reciprocate within the nail driving nose. Regarding a nail driving machine that drives into the material to be driven by a moving rod-shaped or blade-shaped driver,
In particular, the present invention relates to a nail driving depth adjusting device that adjusts the driving depth of a nail into a material to be driven in accordance with the material of the material to be driven or the type of nail.

In normal cases, the above-mentioned nailing machines are often used for the task of fixing decorative plywood to a substrate. This decorative plywood is used in a variety of materials, from soft to hard, depending on the purpose, and the actual situation is that the types of nails are also used depending on the purpose.

By the way, with conventional nail driving machines, the driving power and the stroke of the rod-shaped or blade-shaped rod that reciprocates inside the nose are constant, so a nail driving machine designed specifically for hard materials can be used to cut decorative plywood made of soft materials. When a nail is driven into the board, the driving power is so great that the nail passes through the decorative plywood, which often results in the decorative plywood not being fixed to the board.

In addition, there was a drawback that cracks were formed at the nail-driving portions of the decorative plywood, which significantly impaired the appearance of the decorative plywood after the nails were driven.

On the other hand, even if the hardness of the material to be driven is constant, the above-mentioned disadvantages may occur if, for example, the nail to be driven is too short for the driving power and driving stroke of the nail gun. appear and come.

The purpose of this invention is to drive nails into various soft materials in the best possible condition by using a nail driver that exerts the driving power needed to drive nails into hard materials. The objective is to provide a nailing machine that is easy to use.

Another object of the present invention is to provide a nailing machine that can drive nails of various lengths into materials in the best possible condition.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 1 to 9. In the embodiment shown in FIG. 1, the present invention is applied to a pneumatic nailing machine 1. A housing 2 of this pneumatic nailing machine 1 has a built-in striking cylinder/piston mechanism for reciprocating a rod-shaped or blade-shaped driver 3. The driver 3 reciprocates within a nail driving nose 4 projecting below the housing 2.

Compressed air, which is the power source for the above-mentioned impact cylinder/piston mechanism, is stored in a compressed air storage chamber formed inside the grip 5, which constitutes a rearwardly projecting portion of the housing 2. Compressed air at a constant pressure is constantly supplied to this compressed air storage chamber from a compressor (not shown) through an air plug provided at the rear end of the grip 5.

The operation of the striking cylinder/piston mechanism is manually controlled by operating the manual trigger 8 of the trigger valve 7.

A sheath-like nail magazine 9 is disposed below the grip 5 so as to protrude rearward from the nail driving nose 4. This nail magazine 9 is loaded with connected nails 11 formed by connecting a large number of single nails 10 in parallel with adhesive.

The nail magazine 9 includes a casing 12 that is integral with the nail driving nose 4 and extends to the rear end of the grip 5, and a magazine that is movable in the longitudinal direction while sliding with the casing 12. In order to click the magazine body 13 against the body 13, the pusher 15 which presses the connecting nail 11 toward the nail driving nose 4 by the elastic force of the compression coil spring 14 inside the magazine body 13, and the casing 12. It consists of a click lever 16. The magazine body 13 has a bottom plate 17, and a bottom surface 17a of the bottom plate 17 is flat.

A positioning guide plate 19, which constitutes a part of the nail driving depth adjusting device 18, is fixed to the bottom surface 17a. A contact base 20 made of synthetic resin or rubber elastic material is attached to a midway point in the longitudinal direction of both side edges 19a and 19b of the positioning guide plate 19 so as to be slidable along the longitudinal direction of the nail magazine 9. Supporting rail bodies 21a and 21
b are provided facing each other. A plurality of positioning teeth 22 are formed in parallel at a constant pitch on the bent end portions 21c and 21d of these rail bodies 21a and 21b, respectively.

As shown in FIGS. 1 and 3, the contact base 20 includes an upper portion 23, an intermediate portion 24, and a lower portion 2.
It is divided into 5 parts. This upper part 23 comes into contact with the lower surface 19a of the positioning guide plate 19. The intermediate portion 24 is narrower than the upper portion 23 and the lower portion 25, thereby forming straight slide guide grooves 26 and 27 between the upper portion 23 and the lower portion 25.
The tip bent portions 21c and 21d of the rail bodies 21a and 21b are inserted into the slide guide grooves 26 and 27.
is inserted. The direction of the slide guide grooves 26 and 27 corresponds to the direction of the upper surface 28 of the contact base 20.

The lower surface 29 of the contact base 20 is located at its front end 2
It forms an inclined surface that slopes upward at a predetermined angle α from 9a toward the rear end 29b.

A click spring assembly groove 30 is formed in the intermediate portion 24, as shown in FIG. The click spring mounting groove 30 has a substantially U-shaped planar shape, and a click spring support portion 31 extending in the direction of the central axis of the intermediate portion 24 is formed within the click spring mounting groove 30. This click spring support portion 31 is located within the click spring assembly groove 30.
A rectangular movement operation groove 32 is formed in a portion facing the . The click spring mounting groove 30 has mounting groove ends 33 and 34 that open into the slide guide grooves 26 and 27.

The overall shape of the click spring assembly groove 30 is U.
A letter-shaped click spring 35 is assembled. This click spring 35 is a torsion coil spring, and click claws 35a and 35b at both ends thereof move in and out between the assembly groove ends 33 and 34 and the slide guide grooves 26 and 27.

The coil portion 35c of the click spring 35 is located within the movement operation groove portion 32.

As shown in FIG. 2, a rectangular operation window 36 is opened in the lower part 25 of the contact base 20 at a position corresponding to the movement operation groove 32. As shown in FIG.

As shown in FIG. 3, when the coil portion 35c of the click spring 35 is in a position where it contacts the end surface 31a of the click spring support portion 31, the click claws 35a and 35b of the click spring 35 are connected to the rail body 2.
It is latched onto one of the positioning teeth 22 of 1a and 21b. Thereby, the contact base 20 is positioned at a fixed position on the magazine body 13.

As shown in FIG. 4, the coil portion 35c of the click spring 35 is moved to the rear of the nail magazine 9 so that the click claws 35a and 35b of the click spring 35 come into contact with both side surfaces 31b and 31c of the click spring support portion 31. In this case, the click claws 35a and 35b of the click spring 35 separate from the positioning tooth 22 and retreat into the assembly groove end 33. With this, contact base 20
is the magazine body 1 for the magazine body 13.
It becomes movable in the longitudinal direction of 3.

Hereinafter, the operation of the nail driving depth adjusting device 18 of the present invention will be described in detail for the case where nails are driven into two types of materials to be driven with different hardnesses.

First, when driving a nail 10 into a material made of a hard material using the nail gun 1, the contact base 20 is moved along the rail bodies 21a and 21b as shown in FIG. Then slide the magazine 9 to its terminal position on the front end side. In this state, the lower surface 29 of the contact base 20 is pressed against the surface of the material to be driven to support the entire nailing machine 1. Then, the tip 4a of the nail driving nose 4 is positioned in a state where it is in contact with the surface of the material to be driven. At this time, the nail driving nose 4
Although the nail 10 is supported with its axial direction inclined with respect to the surface of the material to be driven, this inclination can be ignored because the length of the nail 10 to be driven is short. When the nail 10 is driven into the material to be driven in this state, the nail 10 is stably driven by the driving power of the nailing machine 1.

On the other hand, the case where the nail 10 is driven into a material to be driven which is made of a softer material than the material to be driven will be explained based on FIG. 5. In this case, the contact base 20 is connected to the rail body 21a as shown in FIG.
and 21b toward the rear end of the nail magazine 9, and the contact base 20 is set in a predetermined position by the click action of the click claws 35a and 35b of the click spring 35 and the positioning teeth 22. At this time, if a scale or the like indicating the hardness of the material is engraved on the side surfaces of the rail bodies 21a and 21b, the sliding operation of the contact base 20 can be performed accurately without relying on intuition.
The contact base 20 can be accurately positioned at a predetermined position. In this state, the lower surface 29 of the contact base 20 is pressed against the surface of the material to be driven to support the entire nailing machine 1. Then, the tip 4a of the nail driving nose 4 is positioned in a state where it is raised from the surface of the material to be driven by a predetermined height h. When the nail 10 is driven out in this state, the state of impact of the nail 10 by the driver 3 is
Since the stroke is constant, the stroke ends at the space S between the tip 4a of the nail driving nose 7 and the surface of the material to be driven. However, since the material to be driven is soft, the nail 10 penetrates into the material due to inertia, and when the head of the nail 10 hits the surface of the material to be driven, the nail 10 penetrates into the material to be driven by inertia. A state can be obtained in which the penetration of 10 is stopped. Therefore, the above nail 1
0 will be stably driven at a predetermined position where it will penetrate deeply into the material to be driven.

Although the above embodiment describes the case where nails are driven into materials made of different materials, similar adjustment operations can be performed when driving various nails into materials made of materials with a certain hardness. This allows the nail to be stably driven into the material to be driven.

Another embodiment of the present invention will be described based on FIGS. 6 and 7. In this embodiment, rail bodies 41 and 42 are provided midway on both sides of the positioning guide plate 40. A plurality of positioning teeth 43 are formed only on the bent end portion 42a of the rail body 41. A click spring assembly groove 46 as shown in FIG. 7 is formed in the middle portion 45 of the contact base 44, which is divided into three layers. In the longitudinal direction of the contact base 44, spring locking portions 47 and 48 are provided with a portion of the intermediate portion 45 protruding from both ends of the click spring assembly groove 46. As part of the click spring assembly groove 46 , an assembly groove end 50 that is continuous with the slide guide groove 49 is formed to protrude laterally from the contact base 44 .

A click member 52 is provided at the center of the click spring 51, which is an arch-shaped leaf spring assembled in the click spring assembly groove 46, and a click pawl 52a at one end of the click member 52 is engaged with one of the positioning teeth 43. As a result, the position of the contact base 44 with respect to the magazine body 13 is fixed. An operating knob 53 is attached to the click member 52, and the operating knob 53 is located within an operating window 55 formed in a lower portion 54 of the contact base 44.

The click pawl 52a of the click member 52 is urged by the spring force of the click spring 51 and is constantly engaged with the positioning tooth 43. Therefore, the operator releases the click by moving the operating knob 53 in the operating window 55 downward in FIG. can do.

Still another embodiment of the present invention will be described based on FIG. According to this embodiment, the click lever 60
is pivotally supported by a part of the middle portion 62 of the contact base 61 which is divided into three layers. The non-pivot end side of the click lever 60 is bent to open the click pawl 6.
3. The click lever 60 is biased to rotate by a compression coil spring 64 so that its click pawl 63 is always latched onto one of the positioning teeth 43.

The operator can release the click of the contact base 61 against the magazine 9 by moving the operating knob 65 integrated with the click lever 60 downward in FIG.

Still another embodiment of the present invention will be described based on FIG. 9. In this embodiment, a substantially rectangular click spring assembly groove 72 is formed in the middle part 71 of the contact base 70 divided into three layers, and a spring locking part 73 is provided at one lateral end of the click spring assembly groove 72. is formed, and an assembly groove end 74 is formed on the other lateral end side of the click spring assembly groove 72.
An L-shaped leaf spring-like click spring 75 is engaged with a spring locking portion 73 at its proximal end 75a, and is engaged with one of the positioning teeth 43 at a click pawl 75b on its distal end side. The operator can release the click of the contact base 70 from the nail magazine 9 by operating the click spring 75 so as to bend it.

As described above, according to the present invention, the contact base, whose nail driving depth can be varied by sliding the nail magazine, can be fixed by the engagement of the click pawl and the positioning teeth. It is difficult to move after setting, and it is also easy to change the setting position.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view of a pneumatic nailer equipped with a nail driving depth adjusting device according to an embodiment of the present invention, and FIG. 2 is a bottom view of the nail driving depth adjusting device. Figure 3 is a cross-sectional view taken along the - line in Figure 1, Figure 4 is a cross-sectional view showing the state of the click spring when the contact base is made slidable in the above nail driving depth adjustment device, and Figure 5 is a cross-sectional view showing the condition of the click spring when the contact base is made slidable in the above nail driving depth adjustment device. A side view of the operation of the nail driving depth adjusting device when driving a nail, FIG. 6 is a bottom view of the nail driving depth adjusting device according to another embodiment of the present invention, and FIG. 7 is shown in FIG. FIG. 8 is a sectional view of essential parts of a nail driving depth adjusting device; FIG. 8 is a bottom view of a nail driving depth adjusting device according to still another embodiment of the present invention; FIG.
The figure is a sectional view of a main part of a nail driving depth adjusting device according to still another embodiment of the present invention. 1...Pneumatic nailer, 2...Housing, 4
...Nail driving nose, 4a...Tip, 9...Nail magazine, 17...Bottom plate, 18...Nail driving depth adjustment device, 19...Positioning guide plate, 20...
... Contact base, 22 ... Positioning teeth, 29
...Bottom surface of contact base, 35a and 35b
...Crick claw.

Claims (1)

[Scope of utility model registration request] A nail-driving nose protrudes from the lower end of the housing, and a nail magazine extends behind the nail-driving nose and has a bottom plate at a position higher than the tip of the nail-driving nose that contacts the surface of the material to be driven. In the nail driving depth adjusting device installed in the installed nail driving machine, the lower surface of the nail magazine has an upward slope at a predetermined angle from the front end side to the rear end side of the nail magazine. At the same time, a contact base with an operation window bored in the center is slidably arranged on the bottom plate of the nail magazine, and a contact base is provided on at least one side of a positioning guide plate fixed to the bottom plate of the nail magazine. A click pawl that engages with a plurality of provided positioning teeth to perform a clicking action is built in so that it can be moved to a position where it can elastically engage with the positioning teeth and a position where engagement with the positioning teeth is released. A nail driving depth adjusting device characterized in that the nail driving depth adjusting device is arranged at a position facing an operating window portion drilled in the contact base.