JP2002346949A - Exhaust structure for nailer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an exhaust structure for a nailer that can easily and reliably fix an exhaust cover. SOLUTION: The exhaust structure is for a nailer wherein a grip 2 is connected to a body 1 having an impact mechanism, the impact mechanism disposed in the body 1 is actuated by a driving source of compressed air to drive a nail, and the compressed air actuating the impact mechanism is exhausted from the grip 2. The exhaust cover 7 with an exhaust port is arranged over an opening in an end portion of the grip 2 via a sealing element 5 and an end cap 6, and a fixing means inserted through the exhaust cover 7 fixes the end cap 6 to the end portion of the grip 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust structure for a nailing machine that exhausts air from an end portion of a grip.

[0002]

2. Description of the Related Art Generally, a nailing machine of the type utilizing compressed air as a driving source supplies compressed air to a striking cylinder provided in a body, drives a striking piston and a driver to strike a nail, and then drives the nail. Compressed air used for air is exhausted from the cylinder head. However, the compressed air exhausted from the cylinder head may be blown to the worker's face, which is not only unpleasant, but also makes the user's hand crazy. For this reason, recently, as shown in FIGS. 6A and 6B, an exhaust pipe 3 is provided on the grip 2, and exhaust is performed through an exhaust port 18 of an exhaust cover 7 provided at an end portion of the grip 2. Has been done. The structure of the exhaust cover is O
There are known those which are fixed to an end cap with a ring and those which fix a sheet metal exhaust cover with screws.

[0003] However, in the former, the exhaust cover is rotatable and the exhaust direction can be changed. However, since the exhaust cover is fixed only by the O-ring interference, it is difficult to use the exhaust cover when it hits something. There is a problem that it is easy to come off when receiving pressure. In the latter case, since a dedicated screw is used for fixing the exhaust cover, the number of parts increases, and there is a problem of cost increase.

[0006] On the other hand, there has been known one using a modified O-ring 25 for sealing the body and the end plate as shown in FIGS. 6 (a) and 6 (b). There is a problem that processing of the shape of the seal portion with the end plate is difficult.

[0005] Further, a filter is known that is provided with a filter at an exhaust port (portion P in FIG. 6) in order to reduce noise and reduce the pressure of compressed air exhausted during nailing. Although the filter has high sound reduction and decompression effects, it has a fibrous shape and lacks rigidity. Therefore, as shown in FIG.
Is attached to the filter 22 so that the effect is not impaired. For this reason, without the support member 30 in the form of a wire mesh, the filter 22 is deformed by the pressure of the compressed air and is exhausted without passing through the filter. Although the exhaust cover 7 to which the filter 22 is attached has an exhaust port 18 as shown in FIG. 6B, it is made by die-casting, and it is difficult to form a fine mesh-like shape. In order to prevent the fibers from protruding from the mouth, it was necessary to assemble a wire net-like part.

However, the above-described structure has a disadvantage that the number of parts increases and assembly of the parts is troublesome, so that the cost increases.

[0007]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and can fix the exhaust cover simply and securely, and can fix the filter without using a wire mesh part. An object of the present invention is to provide an exhaust structure of a driving machine.

[0008]

In order to solve the above-mentioned problems, an exhaust structure of a nailing machine according to the present invention comprises a body provided with a striking mechanism, a grip connected to the body, and a body provided with compressed air as a drive source. In the nailing machine, which drives the nail by driving the hitting mechanism and drives the nail out, and discharges the compressed air that has operated the hitting mechanism from the grip, an opening at the end portion of the grip is provided with a sealing material and an end cap. And an exhaust cover provided with an exhaust port is provided, and the end cap is fixed to an end portion of the grip with a bolt inserted from the exhaust cover.

Further, the exhaust structure of the nailing machine according to the present invention comprises:
A grip is connected to the body equipped with a striking mechanism, and the nail is driven into operation by operating the striking mechanism provided on the body using compressed air as a drive source, and the compressed air activated by the striking mechanism is exhausted from the grip. In the nailing machine, an exhaust cover provided with an exhaust port through a sealing material and an end cap is disposed at an opening of an end portion of the grip, and a projection formed in an internal space between the exhaust cover and the end cap. The filter is fixed by a piece.

The filter may be housed and fixed in an internal space between the exhaust cover and the end cap.

Preferably, the exhaust cover is made of a synthetic resin.

[0012]

According to the first aspect of the present invention, the grip, the end cap, and the exhaust cover are fixed by one common fixing means.
Since it can be fixed at any time, the increase in the number of parts can be suppressed, and the exhaust cover does not come off due to external force or exhaust air pressure.

According to the second aspect of the present invention, since the filter is fixed by the protruding pieces formed in the internal space of the exhaust cover and the end cap, it is not necessary to use a wire mesh part. Therefore, the number of parts does not increase, and the assembling of the parts is simple, so that the cost can be reduced.

According to the third aspect of the present invention, since the filter is housed and fixed in the internal space of the exhaust cover and the end cap, it is not necessary to use a wire mesh part in this case as well.

According to the fourth aspect of the present invention, since the exhaust cover is made of synthetic resin, a fine exhaust port can be formed as compared with a conventional die-cast product.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1A, 1B, 3 and 4
Reference numeral 1 denotes a body of the nailing machine. Although not shown, a striking mechanism including a striking cylinder and a striking piston is disposed inside the body 1, and a head valve for controlling the supply and exhaust of compressed air into and from the striking cylinder is provided above the body 1. A nose portion is disposed at a lower portion of the body 1 for slidably guiding a driver integrally connected to the hitting piston and for receiving a nail supplied from a magazine. These have basically the same configuration as the conventional nailing machine shown in FIG.

Next, a grip 2 is provided on one side of the body 1.
Are connected. The grip 2 is hollow, and a pipe 3 through which exhaust gas after driving by a driver passes is disposed at an upper portion inside. A screw hole 4 into which a bolt is screwed is formed in an end portion of the grip 2.

An exhaust cover 7 having an exhaust port is provided at the opening of the end of the grip 2 via a sealing material 5 and an end cap 6.

The seal member 5 is formed in a shape conforming to the outer shape of the rear end opening of the grip 2, and has a through hole 8 for a bolt.

The end cap 6 is a plate-like member made of synthetic resin. A convex portion 9 for maintaining a gap is formed in the upper part of the center, and an opening 10 that is in contact with the end of the pipe 3 is formed immediately below the convex part 9.
Are formed. Further, a cylindrical portion 11 which also serves as a space is formed at the lower center. A protruding piece 12 is formed at an intermediate portion on the back surface of the end cap 6. Further, a through hole 13 for a bolt is provided in a peripheral portion of the end cap 6.
Are formed, and a magazine mounting portion 14 is formed at the lower end.

The exhaust cover 7 is formed in a container having a bulge from a synthetic resin. A receiving portion 15 that engages with the space holding projection 9 is formed in the upper center, and a through hole 16 through which the cylindrical portion 11 passes is formed in the lower center. An air plug 17 is inserted into the penetrated cylinder 11.
Is fixed. Further, a large number of exhaust ports 18 are formed in the lower half of the exhaust cover 7. Further, a bolt hole 19 is formed in a peripheral portion of the exhaust cover 7.

The receiving portion 15 is provided inside the exhaust cover 7.
The pressing piece 20 is located immediately below the insertion piece 21, and the insertion piece 21 is located below the holding piece 20.
Are formed to protrude. The holding piece 20 and the insertion piece 21 are arranged at positions corresponding to the projecting pieces 12 of the end cap 6.

A filter 22 is formed in a fibrous or sponge shape, and has a central hole 23 formed in the center. The filter 22 is housed in the space inside the exhaust cover 7, the upper part is engaged with the holding piece 20, and the insertion piece 21 is inserted and held in the center hole 23. This allows
The displacement of the filter 22 in both the horizontal direction and the vertical direction can be prevented.

As shown in FIGS. 2 (a) and 2 (b), each of the components having the above-described structure includes a fixing bolt (fixing means) 24 inserted through a bolt hole 19 of the exhaust cover 7 in which the filter 22 is accommodated. The end cap 6 and the through hole 8 of the sealing material 5 are penetrated and further screwed into the screw hole 4 at the end portion of the grip 2 to be integrally connected and fixed.

With the above configuration, the end of the air plug 17 opens into the grip 2 via the cylindrical portion 11, the pipe 3 of the grip 2 opens into the upper space inside the exhaust cover 7, and the upper space is a filter. It communicates with the exhaust port 18 through 22. Further, a filter 22 is stored and held between the end cap 6 and the exhaust cover 7. Filter 2
Numeral 2 is securely pressed and held by the holding piece 20 and the insertion piece 21 on the exhaust cover 7 side and by the protruding piece 12 from the end cap 6 side.

As shown in FIG. 5, a tapered surface 24a is formed on the head of the fixing bolt 24 to prevent the fixing bolt 24 from being excessively tightened. Fixing bolt 2
Excessive tightening of 4 causes deformation of exhaust cover 7. The head of the fixing bolt 24 may have a stepped shape.

The filter 22 only needs to be fixed in the internal space between the exhaust cover 7 and the end cap 6.
It is not limited to the above example. For example, projecting pieces may be formed on the mutually facing surfaces of the exhaust cover and the end cap so as to alternately mesh with each other, and the filter may be sandwiched and fixed therebetween. Alternatively, a storage space for the filter may be formed therein by connecting the exhaust cover and the end cap, and the filter may be stored and fixed in this storage space.

According to the above configuration, the common fixing bolt 24
The grip 2, end cap 6, and exhaust cover 7
Since it can be fixed at a time, an increase in the number of parts can be suppressed, and the exhaust cover 7 does not come off due to external force or exhaust air pressure.

Further, since the filter 22 is fixed by the protruding pieces formed in the internal space of the exhaust cover 7 and the end cap 6, it is not necessary to use wire mesh parts. Therefore, the number of parts does not increase, and the assembling of the parts is simple, so that the cost can be reduced.

Further, since the exhaust cover 7 is made of a synthetic resin, the exhaust port 18 can be formed more finely than a conventional die-cast one. For this reason, the filter 22 does not protrude from the exhaust port 18.

[Brief description of the drawings]

FIGS. 1A and 1B are a side view and a rear view of a grip portion of a nailing machine, respectively.

FIGS. 2A and 2B are cross-sectional views taken along lines AA and BB in FIG. 1B, respectively.

FIG. 3 is an exploded perspective view of the exhaust structure of the nailing machine according to the present invention as viewed from the front side.

FIG. 4 is an exploded perspective view of the exhaust structure of the nailing machine as viewed from the rear side.

FIG. 5 is an explanatory view of a fastening mode using fixing bolts.

6 (a) and 6 (b) are a side view of a conventional nailing machine and a rear view of a grip.

FIG. 7 is a perspective view of a conventional filter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 2 Grip 6 End cap 7 Exhaust cover 22 Filter

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Takao Tsukada 6-6, Hakozakicho, Nihonbashi, Chuo-ku, Tokyo F-term in Max Corporation (reference) 3C068 AA09 BB01 CC02 JJ05

Claims (4)

[Claims] 1. A compression mechanism in which a grip is connected to a body provided with a striking mechanism, and a nail is driven by driving a striking mechanism provided on the body by using compressed air as a driving source, and the striking mechanism is actuated. In a nailing machine for exhausting air from a grip, an exhaust cover provided with an exhaust port through a sealing material and an end cap is disposed at an opening of an end portion of the grip, and the end is fixed by a fixing means inserted through the exhaust cover. An exhaust structure for a nailing machine, wherein a cap is fixed to an end portion of the grip. 2. A compression mechanism in which a grip is connected to a body provided with a striking mechanism, and a nail is driven by operating a striking mechanism provided on the body using compressed air as a driving source, and the compression mechanism is operated with a striking mechanism. In a nailing machine for exhausting air from a grip, an exhaust cover provided with an exhaust port via a sealing material and an end cap is disposed at an opening of an end portion of the grip, and an internal space between the exhaust cover and the end cap is provided. An exhaust structure for a nailing machine, wherein the filter is fixed by the formed projecting pieces. 3. The exhaust structure for a nailing machine according to claim 1, wherein the filter is housed and fixed in an internal space between the exhaust cover and the end cap. 4. The exhaust structure according to claim 1, wherein the exhaust cover is made of a synthetic resin.