JP4032587B2 - Washer nailer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a washer nailing machine having a nail magazine and a washer magazine, and fixing a waterproof sheet laid on a roof base or the like with a washer and a nail, and particularly, when the washer is not loaded, the activation is stopped. Thus, the present invention relates to a washer nailing machine that prevents empty shots.
[0002]
[Prior art]
When laying a waterproof sheet with tar impregnated on paper on the base of a roof of a house or the like and securing it with a nail, the waterproof sheet is securely held to prevent breakage and to prevent water leakage. It is specified that a washer is interposed between the seat and the seat.
[0003]
The washer for tarpaulin construction is a round plate washer manufactured by resin injection molding with a diameter of several centimeters. Place the washer on the laid tarpaulin and place the washer at the center of the washer with a hand-held hammer or nailing machine. If a nail is driven in, the peripheral part of the washer presses the waterproof sheet against the roof base and fixes it.
[0004]
In addition, a washer nailing machine that can more efficiently perform the waterproof sheet is also known. The washer nailing machine is a known nailing machine with a washer magazine and a washer feed mechanism added thereto, and is connected to the tip of the nose from the washer magazine and connected to the nose. When the driver hits the nail, the nail penetrates the washer and is driven into the roof base, and the operation of fixing the washer with the nail by the operation of only the trigger lever can be continuously performed.
[0005]
[Problems to be solved by the invention]
Since the nails and the washers are greatly different in diameter, the volume-to-number ratio is significantly different between the connected nails and the connected washers. Therefore, the number of connected washers that can be loaded into the washer magazine is considerably smaller than the number of connected nails that can be loaded into the nail magazine of the washer nailing machine. Also, increasing the capacity of the washer magazine to accommodate a large amount of washers is not preferable from the viewpoint of workability and handling.
[0006]
Therefore, when using the washer nailing machine, the washer is used up before the nail, but the trigger lever is operated continuously without realizing that the remaining amount of the washer is zero. May be driven. In this case, the nail is directly driven into the tarpaulin, causing the tarpaulin to break or leaking water. However, it is troublesome to remove the hammered nails, and there is a possibility that the tarpaulin may be broken when removing the nail. is there.
[0007]
Therefore, there is a technical problem to be solved in order to prevent the washer nailing machine from starting when the connected washer loaded in the washer magazine is used up and to prevent only the nail from being driven into the waterproof sheet. Therefore, an object of the present invention is to solve the above problems.
[0008]
[Means for Solving the Problems]
The present invention proposes to achieve the above-described object, and includes a pneumatic cylinder, a nail magazine for storing a connection type nail, a washer magazine for storing a connection type washer, a nail feed mechanism, and a washer feed mechanism. The nail feed mechanism supplies the connected nails in the nail magazine to the nose connected to the front end of the pneumatic cylinder, and the washer feed mechanism supplies the connected washers in the washer magazine to the tip of the nose. A washer nailing machine for injecting a nail in the nose and nailing the washer to a nail target by a driver coupled to a piston;
Provide a slidable contact arm along the nose, with the spring projecting the contact arm in the nail injection direction by the spring, sliding the contact arm toward the nailing object and sliding it toward the pneumatic cylinder, and pulling the trigger lever In the washer nailing machine provided with a trigger mechanism that activates the pneumatic cylinder by two operations,
The washer supply path is provided with a washer detection means such as a lever or a slide actuator for detecting the presence or absence of a washer. When there is no washer in the supply path, the washer detection means is engaged with the contact arm and the contact arm A washer nailing machine configured to prevent sliding to a trigger position and to enable trigger operation by disengaging the washer detection means and the contact arm when there is a washer in the supply path It is to provide.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a washer nailing machine 1. A grip 3 protrudes from a cylinder housing 2 at a substantially right angle, and a pneumatic cylinder 4 is built in the cylinder housing 2. The tip of the driver 6 coupled to the piston 5 of the pneumatic cylinder 4 is inserted into the center hole of the nose 7 attached to the tip of the cylinder housing 2. In FIG. 1, the right is referred to as the upper side, and the left is referred to as the lower side.
[0010]
When the air plug 8 attached to the end of the grip 3 and the air compressor are connected by a hose, high-pressure air is supplied to the air chamber 9 in the grip 3 and in the upper part of the cylinder housing 2.
[0011]
The air chamber of the trigger valve 10 disposed at the base of the grip 3 and the upper air chamber 12 of the head valve 11 provided at the upper end of the pneumatic cylinder 4 are connected by a thin pilot line 13.
[0012]
The pressure air in the air chamber 9 acts on the upper surface (right in the drawing) and the lower edge of the head valve 11 of the pneumatic cylinder 4, and the pressure receiving area on the upper surface is larger than the pressure receiving area on the lower surface. 11 is in the lowered position and is in contact with the upper end of the pneumatic cylinder 4.
[0013]
A pivotable free arm 15 is pivotally attached to a trigger lever 14 disposed in front of the trigger valve 10. The contact arm 16 that slides up and down along the nose 7 is refracted on the back surface of the nose 7 and faces the front surface of the trigger lever 14, and the push plate 17 placed on the contact arm 16 is free. It is in contact with the front surface of the arm 15.
[0014]
As shown in FIG. 1, when the trigger lever 14 is pulled in a state where the contact arm 16 as a safety device is not pressed against the waterproof sheet or the like, the free arm 15 does not contact the stem 10a of the trigger valve 10, and the pneumatic cylinder 4 cannot be activated, but when the contact arm 16 is pressed against the waterproof sheet or the like and relatively lifted, the tip of the free arm 15 is pushed up by the push plate 17, and if the trigger lever 14 is pulled in this state, The free arm 15 ascends as a whole with the tip as a fulcrum, the stem 10a of the trigger valve 10 is pushed by the free arm 15 and the trigger valve 10 is opened.
[0015]
When the trigger valve 10 is opened and the pressure air in the upper air chamber 12 of the head valve 11 is discharged to the atmosphere through the trigger valve 10, the head valve 11 is raised by the pressure air acting on the lower surface of the head valve 11, and the air chamber Nine pressure air flows into the pneumatic cylinder 4. Thereby, the piston 5 and the driver 6 are lowered, and the driver 6 injects the nail in the nose 7.
[0016]
When the piston 5 passes through the position of the check valve 18 formed by a hole and an O-ring provided in the upper and lower intermediate portions of the pneumatic cylinder 4, the pressure air passes through the check valve 18 and the blowback chamber around the pneumatic cylinder 4. 19 is filled.
[0017]
When the operation of the trigger lever 14 is released after nailing, the trigger valve 10 is closed, the pressure air in the air chamber 9 is supplied to the upper air chamber 12 of the head valve 11 through the pilot conduit 13, and the head valve 11 is lowered. The air chamber of the pneumatic cylinder 4 and the air chamber 9 are shut off, and the pressure air in the pneumatic cylinder 4 is exhausted through the center hole of the head valve 11 and the vent of the head cover 20, and the piston 5 and the driver 6 are connected to the blowback chamber 19. It rises by the pressure air and returns to the standby position.
[0018]
A nail guide rail 21 is formed on the rear surface of the nose 7 (right side in FIG. 1), and a drum-shaped nail magazine 22 is connected to the rear end of the nail guide rail 21. The nail guide rail 21 is provided with a ratchet type nail feed claw 23, and the nail feed claw 23 is connected to a pneumatically driven spring offset nail feed cylinder disposed on the back surface in FIG.
[0019]
A drum-shaped washer magazine 24 having a diameter substantially equal to that of the nail magazine 22 is attached to the lower surface of the nail magazine 22. As shown in FIGS. 1 and 2, the rotating guide rail portion 25 and the horizontal guide rail portion 26 extend forward from the side surface of the washer magazine 24, and the horizontal guide rail portion 26 reaches the tip of the nose 7.
[0020]
The washer magazine 24 is loaded with a roll-type connected washer, and the connected washer is supplied to the tip of the nose 7 through the rotating guide rail portion 25 and the horizontal guide rail portion 26. The rotating guide rail portion 25 is rotated by 90 degrees around the axis in the feed direction in order to twist the connecting type washer pulled out from the washer magazine 24 in a vertical posture into a horizontal posture by 90 degrees. 26 is connected.
[0021]
A pneumatically driven spring offset type washer feed cylinder 27 is attached to the horizontal guide rail portion 26. As shown in FIG. 3, a ratchet type washer feed pawl 28 connected to the washer feed cylinder 27 is connected to the horizontal guide rail portion. It protrudes from above 26 to the passage of the connecting washer W. Reference numeral 29 denotes a ratchet type check claw.
[0022]
The air chambers of the nail feed cylinder 30 and the washer feed cylinder 27 shown in FIG. 2 are connected to the blowback chamber 19 shown in FIG. 1, respectively. As described above, the piston 5 of the pneumatic cylinder 4 is lowered and the blowback chamber is moved. When the high-pressure air is filled in 19, the nail feed claw 23 and the washer feed claw 28 are retracted by the air pressure.
[0023]
When the operation of the trigger lever 14 is released and the piston 5 of the pneumatic cylinder 4 rises to the standby position, and the air in the blowback chamber 19 is exhausted, the ratchet type nail feed claw 23 and the washer feed claw 28 are moved. The nail and the washer are engaged with each other and moved forward by a spring, the leading nail is supplied into the nose 7, and the leading washer is supplied to the tip portion of the nose 7.
[0024]
A washer detection lever 31 that pivots horizontally is pivotally attached to the front portion of the horizontal guide rail portion 26 of the washer feed mechanism. As shown in FIG. 3, the washer detection lever 31 is disposed beside the passage of the coupling type washer W, and the torsion coil spring (not shown) projects the tip portion into the passage and the rear end portion is outside. It is urged so that it may protrude.
[0025]
A claw 16 a that rises upward is formed at the tip of the contact arm 16, and the claw 16 a is located beside the front portion of the horizontal guide rail portion 26. For example, in the case of poor feeding of the connecting washer W, or when the connecting washer W is used up and there is no washer W at a predetermined position on the front portion of the horizontal guide rail portion 26 as shown in FIG. The tip end portion of the contact arm 16 protrudes into the passage and the rear end portion protrudes outward and is positioned on the claw 16 a of the contact arm 16.
[0026]
In this case, even if the contact arm 16 is pressed against the surface of a waterproof sheet or the like, it is impossible for the claw 16a to collide with the washer detection lever 31 and push the contact arm 16 upward. As described above, in order to activate the pneumatic cylinder 4, a combined operation of the pushing operation of the contact arm 16 and the pulling operation of the trigger lever 14 is required, so that the washer W is positioned immediately below the nose 7 as shown in FIG. If not, the pneumatic cylinder 4 cannot be activated by pulling the trigger lever 14.
[0027]
On the other hand, as shown in FIG. 4, when the washer W is sent to a position directly below the nose 7, the leading end of the washer detection lever 31 is pushed out of the passage by the leading washer, and the trailing end is the claw 16 a of the contact arm 16. Retreat from the upper position. Thereby, there is no obstacle for preventing the contact arm 16 from moving upward, and the contact arm 16 can be pressed against the surface of the waterproof sheet. When the trigger lever 14 is pulled, the pneumatic cylinder 4 is activated to eject a nail, the nail penetrates the center of the washer W and is driven into the roof base or the like, and the waterproof sheet is fixed by the washer W.
[0028]
The present invention is not limited to the above-described embodiment, and various modifications are possible within the technical scope of the present invention, and it is natural that the present invention extends to those modifications.
[0029]
【The invention's effect】
As described above, the washer nailing machine of the present invention cannot push the contact arm when the loaded connected washer is exhausted, and the trigger operation is impossible. The possibility that only the nail is driven into the waterproof sheet or the like and causes breakage of the waterproof sheet or the like is eliminated without being injected.
[Brief description of the drawings]
FIG. 1 is a side sectional view of a washer nailing machine according to an embodiment of the present invention.
FIG. 2 is a bottom view of a washer nailing machine.
3A is an explanatory view of a washer feeding mechanism of a washer nailing machine, and FIG. 3B is a view taken along line AA in FIG.
4A is an explanatory view of a washer feeding mechanism of a washer nailing machine, and FIG. 4B is a view taken along line AA in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Washer nail driver 4 Pneumatic cylinder 5 Piston 6 Driver 7 Nose 14 Trigger lever 16 Contact arm 16a Claw 21 Nail guide rail 22 Nail magazine 23 Nail feed claw 24 Washer magazine 25 Rotation guide rail part 26 Horizontal guide rail part 27 Washer feed cylinder 28 Washer Claw 29 Check Claw 30 Nail Feed Cylinder 31 Washer Detection Lever

Claims (1)

A pneumatic cylinder, a nail magazine for storing a connecting type nail, a washer magazine for storing a connecting type washer, a nail feeding mechanism, and a washer feeding mechanism are provided, and the connecting type nail in the nail magazine is pneumatic cylinder by the nail feeding mechanism. Is supplied into the nose connected to the front end of the nozzle, the connected washer in the washer magazine is supplied to the tip of the nose by the washer feed mechanism, and the nail in the nose is ejected by the driver coupled to the piston of the pneumatic cylinder. A washer nailing machine for nailing to a nailing object,
A contact arm that slides freely along the nose is provided. The spring protrudes the contact arm in the nail injection direction, the contact arm is applied to the nail object and slid toward the pneumatic cylinder, and the trigger lever is pulled. In the washer nailing machine provided with a trigger mechanism that activates the pneumatic cylinder by two operations
The washer supply path is provided with a washer detection means such as a lever or a slide actuator for detecting the presence or absence of a washer. When there is no washer in the supply path, the washer detection means is engaged with the contact arm and the contact arm A washer nailing machine configured to prevent the sliding to the trigger position and to enable the trigger operation by releasing the engagement between the washer detecting means and the contact arm when the supply path has a washer.

Images