JPH0516077A - Universal driving machine - Google Patents

Abstract

PURPOSE:To obtain a light and compact universal driving machine, which can drive nails to be used for construction and drive one nail repeatedly and drive a nail to a watched position accurately and draw the nails. CONSTITUTION:Universal driving machine is an air pressure type reciprocating hitting tool, of which main frame 1 has the hitting energy for driving a nail with 2-5 times of hitting. A nail guide 24 is fitted to the tip of a bit guide 21 for guiding a bit 20 freely to slide, and the inner diameter of the nail guide 24 is formed into a dimension that a nail head can be inserted, and depth of the nail guide 24, in which the nail is inserted, is formed so as to be larger than the reaction quantity at the time of driving the nail and shorter than the full length of the nail. When the tip of the nail guide 24 is pushed up and the bit 20 progresses, the tip of the bit 20 is projected from the tip of the nail guide 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a universal driving machine which is mainly used in the construction industry and which is used for operations such as hammering nails, hammering nails and pulling nails.

[0002]

2. Description of the Related Art In recent years, compressed air nailing machines have been widely used, and have become indispensable for construction work, especially for joining timbers with nails. As is well known, such a nail driver is, with some exceptions, a piston or one of the drive bits integrally formed with the piston.
The nail is driven by the lowering motion of the number of times.

[0003]

However, the conventional nail driving machine has the following drawbacks. 1. It's heavy because it's designed to hit nails in one shot. For example, the weight of a nailing machine for driving a narrow iron round nail BN65 of JIS A5555 is 2.6 to 3.5 kg, which is much heavier than a hand hammer for nailing. 2. Since the nail has the energy to drive it with a single blow, when the nail begins to enter the wood, it shears the fibers of the wood and pushes it forward. Therefore, compared with the way nails are pushed laterally to spread the fibers of wood when hammered with a hand hammer, the nail and wood have a smaller binding force when hammered with a nailing machine. 3. If the nail is driven into a hard knot with a nailing machine and the nail does not enter the wood for the entire length and the nail head floats, the nail head cannot be driven again with the nailing machine. That is, it is because it is difficult to put the head of the nail into the injection hole of the nailing machine in actual operation because the next nail is fed into the injection hole once it is driven. That is, the nailing machine cannot make additional hits. 4. When driving diagonally to the surface of the wood, the nail head often floats with a nailing machine, but at this time as well as in the previous section 3, additional hitting is not possible. 5. Use a nailing machine when joining metal fittings for wooden houses, that is, steel plate short metal fittings, bracing plates, corner fittings, chevron plates, etc. to wood, as specified by the Japan Housing and Timber Center. It is difficult. Because the holes into which these metal nails are inserted are almost the same as the diameters of the nail shafts, and it is difficult for the nails to enter the holes of the metal because the injection holes hit the metal with the injection hole in a state where the tip of the nail cannot be seen. That is, you cannot hit the target. Even if a nail enters a hole in a metal object, the nail head hits the metal object and is deformed because it is driven with a single blow. 6. When the tip of a nail driven into a wood board is protruding from the other side of the wood, it cannot be hammered back. As described above, the conventional nail driving machine has a problem that it cannot be used like a hand hammer. An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to provide a driving tool that can be used like a hand hammer.

[0004]

To achieve the above object, there is provided a driving machine capable of driving a nail with a plurality of times, preferably 2 to 5 times, into a wood. The driving machine has a bit guide for guiding a bit for hitting a nail, and a nail guide slidable in the axial direction of the bit is attached near the tip of the bit guide. The nail guide has an inner diameter larger than the head diameter of the nail, and is urged by a spring toward the tip end side of the bit guide. It is larger than the recoil amount at the time of insertion and smaller than the length of the nail, it pushes against the spring against the main body of the driving machine, and when the bit is in the advanced position, the bit tip projects from the nail guide tip. The structure. The inner diameter of the bit guide is larger than the shaft diameter of the nail to be used and smaller than the head diameter of the nail.

[0005]

Operation The above-mentioned driving machine has the following functions. 1. When the needle is hit with a bit, the nail insert length of the nail guide is longer than the amount of so-called recoil that the driving machine moves to the body side due to the recoil, so the nail head remains inside the nail guide. It has become. Therefore, by operating the trigger valve of the driving tool body, it is possible to strike with a bit a plurality of times in succession. Further, since the hammer is driven by a plurality of strokes, the piston, the cylinder and other parts can be made smaller than the nailing machine that is driven by one stroke, and the hammer can be made compact and lightweight. 2. As in 1. above, the nail is not hammered in one stroke, but is hammered in multiple strokes, so compared to a nailing machine that hammers in a single stroke, the proportion of shearing the fibers of the wood is small, and the binding force between the nail and the wood is small. Grows larger. 3. As in 1. above, the nail is driven with multiple strokes, so even when it is driven into a hard spot such as a knot of wood, it can be continuously stroked until it is fully driven. In other words, you can hit them. 4. When the nail guide is pressed against the wood, the nail guide is pushed toward the main body of the driving machine, and in this state, the bit tip at the advanced position of the bit is protruding from the tip of the nail guide. Even if the nail head floats when the nail is struck diagonally on the surface, the nail head can be driven until the nail head sinks into the wood by additional driving. 5. You can insert the nail head into the nail guide and drive it with the tip of the nail protruding from the nail guide. Therefore, it is possible to accurately hit the intended position. That is, an accurate aiming can be performed. For this reason, it is possible to aim at a small hole for nailing a metal for a wooden house, and since it is driven by a plurality of impacts, it is possible to stop the impact before deforming the hardware and prevent deformation of the hardware. 6. Since the inner diameter of the bit guide is larger than the shaft diameter of the nail, the shaft of the nail can be inserted into the inner diameter of the bit guide from the tip of the nail. Therefore, when the tip of the nail driven into the plate protrudes from the other surface of the plate, insert the nail tip into the bit guide and strike with the bit to move the nail to the opposite side, that is, the nail head side. You can hit it back. That is, it can be used as a nailer.

[0006]

Embodiment An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of the present invention. In the drawing, compressed air is introduced into the driving air chamber 4 inside the body 2 from the air intake 3 of the body 2 of the driving machine body 1. The compressed air enters the head valve upper chamber 7 through the trigger valve chamber 5 and the passage 6, and presses the head valve 8 against the upper surface of the cylinder 9.
In this state, the head valve 8 and the upper surface of the cylinder 9 are sealed, compressed air does not enter the inside of the cylinder 9, and the piston 10 does not move. When the trigger 11 is now pulled, the trigger valve plunger 12 closes the space between the air chamber 4 and the trigger valve chamber 5 and connects the trigger valve chamber 5 and the atmosphere as shown in FIG. Therefore, the compressed air in the head valve upper chamber 7 escapes to the atmosphere via the passage 6 and the trigger valve chamber 5, and the compressed air in the air chamber 4 acts on the lower surface of the outer periphery of the head valve 8, so that the head valve 8 rises. As a result, compressed air flows into the cylinder 9, and the piston 10 and the bit 20 mounted integrally with the piston 10 advance (lower) to drive a nail (not shown) into wood (not shown) or the like. The piston 10
Collides with the damper 13 and stops. The compressed air flowing into the cylinder 9 pushes the check rubber ring 15 from the cylinder intermediate hole 14 and enters the return air chamber 16. When the trigger 11 is released in the state shown in FIG. 2, the trigger valve spring 17 lowers the trigger valve plunger 12 so that compressed air enters the trigger valve chamber 5 and the head valve upper chamber 7 through the passage 6 and pushes down the head valve 8. The space between the air chamber 4 and the inside of the cylinder 9 is closed, and the compressed air inside the cylinder 9 is discharged to the outside air through the exhaust passage 18. The compressed air in the return air chamber 16 passes through the cylinder lower hole 19 and
Acting on the lower surface of the piston 10 to retract (raise) the piston 10
Return to the state of. As described above, in the driving tool body 1, when the trigger 11 is pulled, the bit 20 moves forward and hits, and when the trigger 11 is released, the bit 20 moves backward. The inner diameter and stroke of the cylinder 9 of the driving tool of this embodiment are 29 mm and 64 mm, respectively, and the piston displacement is 4
The nail driving energy at 2.3 cm ³ is the energy that can drive the thin iron round nail BN65 of JIS A5555 into the pine wood with about 4 hits.

At the tip of the main body 1, a bit guide 21 is fastened and fixed to the body 2 by bolts (not shown).
The bit guide 21 is provided with a guide hole 22 for the bit 20 which is larger than the shaft diameter of the driven nail and smaller than the nail head diameter. The outer diameter of the bit 20 is slightly smaller than the inner diameter of the hole 22. The outlet at the tip of the hole 22 of the bit guide 21 is formed in a trumpet shape as shown in FIG. A nail guide 24, which is biased by a spring 23 in the forward direction of the bit 20, that is, the striking direction, is slidably fitted to the outer periphery of the tip end portion of the bit guide 21. The inner diameter of the nail guide 24 is larger than the head diameter of the nail. The nail guide 24 has a collar portion 26 fixed by a nail guide holder 27 in the hooking axial direction. The nail guide holder 27 is screwed to the tip of the bit guide 21.

The nail guide 24 is biased by the spring 23,
When the bit 20 in the state of FIG. 3 is located in the forward direction, that is, on the side opposite to the body 1, the distance D between the tip of the bit guide 21 and the tip of the nail guide 24 is struck by the bit 20 with the nail inserted in the nail guide 24. The size should be larger than the amount of recoil that occurs occasionally and smaller than the length of the nail. Further, when the nail guide 24 is pushed to the main body 1 side and the bit 20 is driven and is in the advanced position, that is, in the state of FIG. 4, the tip of the bit 20 is projected from the tip of the nail guide 24 by a predetermined length. .

In the above embodiment, when the nail head 31 of the nail 30 is inserted into the nail guide 24, the nail tip 32 is applied to the wood 33 and the trigger 11 is pulled, the following effects can be obtained. 1. When the nail 30 is hit with the bit 20, the nail 30 is made of wood 3.
Even in the state as shown in FIG.
Since the nail insertion length of the nail guide 24, that is, the distance D is made longer than the recoil amount of the main body 1 at the time of driving, the nail head 31 does not go out of the nail guide 24 at the time of driving.
Therefore, the hand can be released from the trigger 11 to retract the bit 20, and the trigger 11 can be pulled again to strike the nail 30 with the bit 20. That is, it is possible to continuously strike the nails 30 that are not completely driven into the wood 33. 2. Since the energy is set so that the nail BN65 can be hit by about four times, the weight of the main body 1 can be about 0.65 kg, and the body can be about 200 mm high by 220 mm wide by 53 mm thick. Therefore, the weight is 2.6 to 3.5 kg and the height is 300 mm × width 300 mm × thickness 120 mm, which is extremely light and small. Nail BN
A hand hammer that hits 65 is usually 0.45 to 0.9 kg, which is a weight close to that of a hand hammer. 3. Since the hole 22 of the bit guide 21 is smaller than the nail head diameter, when the nail 30 is inserted into the nail guide 24, the nail head abuts against the tip surface of the bit guide 21 and is not inserted into the hole 22. Further, as shown in FIG. 3, when the nail guide 24 is located in the forward direction of the bit 20, that is, on the side opposite to the main body 1,
Since the distance D between the tip of the bit guide 21 and the tip of the nail guide 24 is made shorter than the length of the nail 30, when the nail 30 is inserted into the nail guide 24, the tip of the nail is the nail guide 24.
Since it goes out from the tip of, the nail tip can be accurately adjusted to the desired position. That is, it can be aimed at. 4. Push the nail guide 24 toward the main body 1 side and bit 2
Since the tip of the bit 20 protrudes from the tip of the nail guide 24 when 0 is hit and is in the advanced position, as shown in FIG.
Even when the nail 30 is driven obliquely into the surface of the wood 33 or the nail 30 is driven into the corner portion, the nail 30 can be driven completely. In addition, the hole 22 of the bit guide 21 is fixed to the nail 3
Since the shaft diameter is larger than 0, the tip of the nail 30 can be inserted into the hole 22. Further, since the outlet of the hole 22 has a trumpet shape, the nail tip can be easily inserted into the hole 22. As a result, the nail 3 driven into the wood 33 as shown in FIG.
When the tip 32 of 0 protrudes from the surface of the wood 33, the nail tip 32 is inserted into the hole 22 of the bit guide 21 and the nail tip 32 is hit with the bit 20 to move the nail 30 to the opposite side, that is, the nail head side. You can hit it back.

The above-described embodiment is merely an example, and the bit 20 is not limited to hitting only once when the trigger 11 is pulled, and the bit 20 moves forward and backward while the trigger 11 is pulled. It may have a repeating structure.
Further, not only an operation of pulling the trigger 11 when operating the trigger plunger 12, but a structure in which the trigger plunger 12 operates when other operations are simultaneously performed may be used.

The nail guide 2 into which the nail head is inserted
It is also possible to attach a magnet to the inner part of 4, that is, the tip of the bit guide 21 so that the nail head is held by the magnet.
In this case, it is not necessary to hold the nail 30, and the operation becomes easy.

[0012]

According to the present invention, the following various effects can be achieved. 1. Since the inner diameter of the nail guide is larger than the head diameter of the nail, the nail can be inserted into the nail guide. Further, since the length of insertion of the nail of the nail guide is larger than the recoil amount when the nail is hit with a bit, the nail does not come off the nail guide by hitting, so one nail should be continuously hit. You can Further, since the nail is driven by a plurality of times, preferably 2 to 5 times, it can be made lighter and smaller than the conventional nail driving machine which drives with a single stroke. From the above, it is possible to provide a lightweight and small-sized driving machine capable of driving a single nail by striking a plurality of times. 2. As mentioned in 1. above, since it is hit with multiple hits,
When the nail is driven into the wood, the forward speed of the nail is slower than that of a nailing machine in which the hammer is driven with a single shot, so that the ratio of shearing the fibers of the wood is reduced and the bonding force between the nail and the wood is increased. 3. Since it is possible to make multiple hits as described in 1. above, when hitting a hard part such as a joint, it is possible to hit continuously until it is completely hit. In other words, you can hit them. 4. When the tip of the nail guide is pushed back against the spring and stopped, and when the bit is in the advanced or hit position, the tip of the bit protrudes from the nail guide, so nail the wood diagonally. Also in this case, it becomes possible to drive the nail head into the plane of the wood or the plane position or deeper than the plane position. 5. The bit guide hole of the bit guide is smaller than the nail head diameter of the nail to be driven, and when the nail is in the position biased in the forward direction of the bit by the spring, the nail insert length is set to the nail guide. Since the length is shorter than the total length of the nail guide, the tip of the nail comes out of the nail guide when the nail is inserted into the nail guide. Therefore, the tip of the nail can be accurately aligned with the desired position for visual inspection, and aiming can be performed, so that the nail can be aimed and driven into the hole of the wooden construction hardware. In addition, since the nail is driven by a plurality of hits, it is unlikely that the wooden construction hardware is deformed as in the conventional nailing machine in which the nail is driven by one stroke. 6. The bit guide hole of the bit guide is larger than the shaft diameter of the nail so that the tip of the nail can be inserted into the guide hole, so when the tip of the nail driven into the wood is protruding from the wood surface. By inserting the tip of the nail into the guide hole and striking it, the nail can be hammered back to the opposite side, that is, the nail head side. That is, it can be used as a nailer.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of a universal driving machine according to the present invention.

FIG. 2 is a vertical sectional view showing an operation of advancing the bit of FIG.

FIG. 3 is a vertical cross-sectional view showing a tip end and other essential parts of the bit guide of FIG.

FIG. 4 is a vertical cross-sectional view showing a state where the bit of FIG. 3 has advanced and the nail guide has been pressed.

FIG. 5 is a vertical cross-sectional view showing an operation example of FIG.

FIG. 6 is a vertical cross-sectional view showing an operation example of FIG.

FIG. 7 is a vertical cross-sectional view showing an operation example of FIG.

[Explanation of symbols]

1 is a main body, 9 is a cylinder, 10 is a piston, 11 is a trigger, 20 is a bit, 21 is a bit guide, 22 is a bit guide hole, 23 is a spring, and 24 is a nail guide.

Claims (2)

[Claims] 1. A cylinder held by a main body, a piston supported by the cylinder so as to be vertically movable and driven by compressed air, and a drive bit mounted on the piston and driving a nail at its tip. , A trigger valve for controlling the descending or ascending operation of the piston, a bit guide mounted below the main body and extending downward, and an inner diameter provided on the bit guide and larger than the nail shaft diameter and smaller than the nail head diameter. A drive bit guide hole, a cylindrical nail guide that is slidably attached to the tip of the bit guide in the same direction as the advance and retreat direction of the drive bit, and has an inner diameter larger than the head diameter of the nail; And a nail guide, and a spring for pressing the nail guide in the driving direction. When the nail guide is at the lower end position, the nail guide The length of the nail inserted inside is longer than the reaction amount when driving the nail and shorter than the total length of the nail, and when the nail guide is at the upper end position and the drive bit is at the hit position, the drive bit A universal driving machine characterized in that the tip projects from the tip of the nail guide. 2. The bit guide hole of the bit guide has a trumpet-shaped outlet at the tip end.
All-purpose driving machine described.