JP2001162558A - Washer-nail driving machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washer-nail driving machine to affix a waterproof sheet, etc., using washers and nails, whereby it is prevented that nails solely are ejected when there are no more washers of coupling type accommodated in a washer magazine. SOLUTION: A washer sensing lever 31 rotating in the horizontal direction is pivoted on a guide rail part 26 of each piece of washers W of coupling type and is energized so that the tip of the lever 31 is protruded by a spring into a passage in the washer W while the tail protrudes outward. A pawl 16a facing the undersurface of the lever 31 is formed at the tip of a contact arm 16. In the case there is no washer in the specified position directly under a nail driver because all washers are gone or because of defective performance of feeding, the tail of the lever 31 is positioned right over the pawl 16a. At this time, the pawl 16a runs against the lever 31 and it is not possible to slide the contact arm 16 upward even if the arm 16 is pressed to the surface of a waterproof sheet, etc., and it is no more practicable to perform the trigger operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washer nailing machine which includes a nail magazine and a washer magazine, and fixes a waterproof sheet laid on a roof base or the like with a washer and a nail. The present invention relates to a washer and nailer in which the start is stopped when it is not performed so as to prevent the idle driving.

[0002]

2. Description of the Related Art When a waterproof sheet made of paper impregnated with tar is laid on a base of a roof of a house or the like to be nailed, the waterproof sheet is prevented from being broken and is securely held, and water leakage is prevented. Therefore, it is specified to interpose a washer between the nail and the tarpaulin.

A washer for installing a waterproof sheet is a round dish-shaped washer having a diameter of several centimeters manufactured by resin injection molding. The washer is placed on the laid waterproof sheet, and a hand-held hammer or a nailing machine is used. If a nail is driven into the center of the washer, the perimeter of the washer holds the tarpaulin down against the roof base and secures it.

[0004] Also, a washer nailer that can more efficiently perform the waterproofing sheet is known. The washer nailing machine is a known nailing machine in which a washer magazine and a washer feeding mechanism are added to the configuration of a known nailing machine. When the driver hits the nail, the nail penetrates the washer and is driven into the base of the roof, and the operation of fixing the washer with the nail can be continuously performed by operating only the trigger lever.

[0005]

Since the diameter of nails and washers is so different, the ratio of volume to number differs significantly between articulated nails and articulated washers. Therefore, the number of connection type washers that can be loaded into the washer magazine is considerably smaller than the number of connection type washers that can be loaded into the nail magazine of the washer nailer. In addition, increasing the capacity of the washer magazine to accommodate a large amount of washers is not preferable in terms of workability and handleability.

Therefore, when using the washer nailer, the washer is used up before the nail, but the operation of the trigger lever is continuously performed without noticing that the remaining amount of the washer has become zero. May drive nails only. In this case, the nail is directly driven into the waterproof sheet, which may cause breakage or water leakage of the waterproof sheet.However, it is troublesome to remove the driven nail, and the waterproof sheet may be broken when the nail is removed. is there.

In view of the above, there is a technical problem to be solved in order to prohibit the starting of the washer nailing machine when the connected washer loaded in the washer magazine is used up and to prevent only nails from being driven into the waterproof sheet. Problems arise, and an object of the present invention is to solve the above problems.

[0008]

SUMMARY OF THE INVENTION The present invention proposes to achieve the above-mentioned object, and comprises a pneumatic cylinder, a nail magazine for accommodating a coupling type nail, a washer magazine for accommodating a coupling type washer, A nail feed mechanism and a washer feed mechanism are provided. 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 feeds the connected washers in the washer magazine. This is a washer nailer that nails the washer to the nailing target by injecting the nail in the nose by the driver connected to the tip of the pneumatic cylinder and the driver connected to the piston of the pneumatic cylinder. An arm is provided, and a contact arm is protruded in a nail ejection direction by a spring, and the contact arm is brought into contact with a nailing target and slid in the direction of a pneumatic cylinder. In a washer nailing machine provided with a trigger mechanism that activates a pneumatic cylinder by two operations of an operation and a pull operation of a trigger lever, a lever or a slide actuator for detecting the presence or absence of a washer in a washer supply path. When there is no washer in the supply path, the washer detection means engages with the contact arm to prevent the contact arm from sliding to the trigger position, and when there is washer in the supply path, the washer is detected. The present invention is to provide a washer nailing machine characterized in that the engagement between the means and the contact arm is released to enable the trigger operation.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a washer nailer 1 in which a grip 3 projects substantially perpendicularly from a cylinder housing 2, and a pneumatic cylinder 4 is built in the cylinder housing 2. The tip of the driver 6 connected 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 an upper side, and the left is referred to as a lower side.

Air plug 8 attached to the end of grip 3
When the air compressor is connected to the air compressor, high-pressure air is supplied to the air chamber 9 in the grip 3 and the upper part of the cylinder housing 2.

The air chamber of the trigger valve 10 arranged 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. .

The pressurized air in the air chamber 9 acts on the upper surface (right side in the figure) of the head valve 11 of the pneumatic cylinder 4 and the outer edge of the lower surface, and the pressure receiving area on the upper surface is larger than the pressure receiving area on the lower surface. Sometimes the head valve 11 is in the lowered position and is in contact with the upper end of the pneumatic cylinder 4.

A rotatable free arm 15 is pivotally mounted on 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 has its upper portion bent at 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 upper portion of the contact arm 16 is free. It is in contact with the front of arm 15.

As shown in FIG. 1, when the trigger lever 14 is pulled while the contact arm 16 as a safety device is not pressed against a waterproof sheet or the like, the free arm 15
Does not come into contact with the stem 10a of the trigger valve 10 and cannot start the pneumatic cylinder 4. However, when the contact arm 16 is pressed against a waterproof sheet or the like and relatively raised, the push plate 17
5 is pushed up, and in this state, the trigger lever 1
When the user pulls 4, the free arm 15 ascends as a whole with the tip as a fulcrum, and the stem 10a of the trigger valve 10 is pushed by the free arm 15 to open the trigger valve 10.

When the trigger valve 10 is opened and the pressurized 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 pressurized air acting on the lower surface of the head valve 11. ,
The pressurized air in the air chamber 9 flows into the pneumatic cylinder 4. As a result, the piston 5 and the driver 6 descend, and the driver 6 ejects the nail in the nose 7.

When the piston 5 passes the position of the check valve 18 constituted by a hole provided in the upper and lower middle part of the pneumatic cylinder 4 and an O-ring, the compressed air is passed through the check valve 18 to the surroundings of the pneumatic cylinder 4. Blowback chamber 1
9 is filled.

When the operation of the trigger lever 14 is released after nailing, the trigger valve 10 closes and the pressure air in the air chamber 9 flows through the pilot line 13 to the head valve 1.
1, the head valve 11 descends to shut off the air chamber of the pneumatic cylinder 4 and the air chamber 9, and the compressed air in the pneumatic cylinder 4 is supplied to the center hole of the head valve 11 and the head cover 20. The piston 5 and the driver 6 are raised by the pressurized air in the blowback chamber 19 and return to the standby position.

A nail guide rail 21 is formed on the back (right side in FIG. 1) of the nose 7, and the nail guide rail 2
A drum-shaped nail magazine 22 is connected to the rear end of 1. A ratchet type nail feed claw 2 is provided on the nail guide rail 21.
3, the nail feed claw 23 is connected to a pneumatically driven spring offset nail feed cylinder located on the back side in FIG.

On the lower surface of the nail magazine 22, a nail magazine 22 is provided.
A drum-shaped washer magazine 24 having a diameter substantially equal to that of the drum-type washer magazine 24 is attached. As shown in FIGS. 1 and 2, the rotation guide rail 25 and the horizontal guide rail 26 extend forward from the side surface of the washer magazine 24, and the horizontal guide rail 26 reaches the tip of the nose 7.

A rolled connection washer is loaded into the washer magazine 24, and the connection washer is supplied to the tip of the nose 7 through a rotating guide rail 25 and a horizontal guide rail 26. The rotating guide rail 25 is provided with a connecting washer 90 pulled out from the washer magazine 24 in a vertical position.
In order to obtain a horizontal attitude by twisting the feed roller, it is connected to the horizontal guide rail portion 26 by being rotated 90 degrees around the axis in the feed direction.

A pneumatically driven spring-off washer feed cylinder 27 is mounted on the horizontal guide rail portion 26. As shown in FIG. 3, a ratchet type washer feed claw 28 connected to the washer feed cylinder 27 is horizontally moved. It protrudes from above the guide rail portion 26 into the passage of the connection type washer W. Reference numeral 29 denotes a ratchet type check claw.

The air chambers of the nail feed cylinder 30 and the washer feed cylinder 27 shown in FIG. 2 are respectively connected to the blowback chamber 19 shown in FIG. 1, and the piston 5 of the pneumatic cylinder 4 is lowered as described above. When the blowback chamber 19 is filled with high-pressure air, the air pressure causes the nail feed claws 23 and the washer feed claws 28 to retreat.

Then, the operation of the trigger lever 14 is released, and the piston 5 of the pneumatic cylinder 4 rises to the standby position,
When the air in the blowback chamber 19 is exhausted, the ratchet-type nail feeding claw 23 and the washer feeding claw 28 engage with the nail and the washer and advance by the spring, and the leading nail is supplied into the nose 7. Then, the leading washer is supplied to the tip of the nose 7.

At the front of the horizontal guide rail portion 26 of the washer feeding mechanism, a washer detecting lever 31 that pivots in the horizontal direction is pivotally mounted. As shown in FIG. 3, the washer detection lever 31 is disposed beside the passage of the connection type washer W, and the torsion coil spring (not shown) protrudes the front end into the passage and the rear end to the outside. It is urged to protrude.

At the tip of the contact arm 16, a claw 16a which rises upward is formed, and the claw 16a is located beside the front of the horizontal guide rail portion 26. For example, when the feed of the connection type washer W is insufficient, or when the connection type washer W is used up, as shown in FIG.
When there is no washer W at a predetermined position at the front of the contact arm 16, the tip of the washer detection lever 31 projects into the passage, and the rear end projects outward and is positioned on the claw 16a of the contact arm 16.

In this case, even if the contact arm 16 is pressed against the surface of a waterproof sheet or the like, the claw 16a cannot 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 pushing the contact arm 16 and pulling the trigger lever 14 is required, so that the washer W is located immediately below the nose 7 as shown in FIG. If not, the pneumatic cylinder 4 cannot be activated even if the trigger lever 14 is pulled.

On the other hand, as shown in FIG. 4, when the washer W is fed to a position immediately below the nose 7, the leading end of the washer detecting lever 31 is pushed out of the passage, and the trailing end of the contact arm 16 From the position above the claw 16a. Accordingly, 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. Then, when the trigger lever 14 is pulled, the pneumatic cylinder 4 starts and ejects a nail. The nail penetrates through the center of the washer W and is driven into a roof base or the like, and the waterproof sheet is fixed by the washer W.

The present invention is not limited to the above embodiment, and various modifications are possible within the technical scope of the present invention, and it goes without saying that the present invention extends to those modifications. is there.

[0029]

As described above, in the washer nailer according to the present invention, when the connected type washer is lost, the contact arm cannot be pushed in, and the trigger operation becomes impossible, so that there is no washer. In this case, only the nail is not injected, and the possibility that only the nail is driven into the waterproof sheet or the like to cause breakage of the waterproof sheet or the like is eliminated.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a washer nailer showing an embodiment of the present invention.

FIG. 2 is a bottom view of the washer nailer.

FIG. 3A is an explanatory view of a washer feeding mechanism of a washer nailer, and FIG. 3B is a view taken along line AA of FIG. 3A.

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 of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Washer nailer 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 Feed Claw 29 Check Claw 30 Nail Feed Cylinder 31 Washer Detection Lever

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hideaki Negishi 6-6, Hakozakicho, Nihonbashi, Chuo-ku, Tokyo Max. Co., Ltd. F-term (reference) 3C068 AA01 AA07 CC02 EE20 FF24 HH20

Claims (1)

[Claims] 1. A pneumatic cylinder, a nail magazine for accommodating articulated nails, and a washer magazine for accommodating articulated washers.
A nail feed mechanism and a washer feed mechanism are provided. The nail feed mechanism supplies the connected nails in the nail magazine to the nose connected to the front end of the pneumatic cylinder. The washer feed mechanism feeds the connected washers in the washer magazine. This is a washer nailer that nails the washer to the nailing target by injecting the nail in the nose by the driver connected to the tip of the pneumatic cylinder and the driver connected to the piston of the pneumatic cylinder, and the contact is slidable along the nose. An arm is provided, and a contact arm is protruded in a nail ejecting direction by a spring, and the contact arm is brought into contact with an object to be nailed and slid in the direction of the pneumatic cylinder; In a washer nailer equipped with a trigger mechanism that activates, a lever or a slide to detect the presence or absence of a washer in the washer supply path Providing washer detecting means such as an id actuator,
If there is no washer in the supply path, the washer detection means engages with the contact arm to prevent the contact arm from sliding to the trigger position. If there is a washer in the supply path, the washer detection means engages with the contact arm. A washer nailing machine characterized in that the trigger is released and the trigger operation is enabled.