JP2002160178A - Tacker for underwater work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To appropriately drive a tack on hard thick material by making a gun barrel having a piston between a blank cartridge and a tack a watertight cartridge structure to enable to be changed underwater and continuously drive tacks. SOLUTION: Both of front and rear ends of the gun barrel 31 loaded with the piston 37, the tack 38 and a blank cartridge 39 are sealed with seal members 41, 42 to make the gun barrel 31 watertight. A tip part of the tack 38 water tightly penetrates the front seal member 41 and projects out forward from the tip surface of the gum barrel 31. In a tacker preventing insufficient drive of tacks by making a prepared hole on a member on which the gun barrel 31 is pressed on and making the tack 38 penetrate it, a tack drive position can be easily and accurately found and the tack can be appropriately driven even underwater of bad visibility by making the projecting tip part of the tack 38 fit in the prepared hole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rivet driving gun used for fixing a member to the surface of a metal or concrete structure by bringing it underwater, and more particularly, to accurately determine a predetermined position of a member to which a barrel tip is pressed. The present invention relates to a tack driving gun for underwater work, which is capable of driving a tack properly by penetrating through a hole and continuously performing a large number of driving.

[0002]

2. Description of the Related Art Landfills, river barriers, harbor piers,
H-section steel, steel pipe sheet piles, steel sheet piles, and other steel materials are widely used for piers, etc. The work of reinforcing steel members with the same reinforcement on the surface of these steel materials, and repairing members made of steel materials with cracks Work is being done on site to plug the pits. In addition, concrete blocks (caisson) are widely used for revetments, embankments, etc. in landfills, and work is being performed on site to close gaps between joints of the laid concrete blocks with sandproof sheets.

FIG. 4A shows a steel sheet pile 5 constituting a retaining wall.
2, an example in which the reinforcing member 53 is overlapped over almost the entire surface,
An example is shown in which a repair member 54 is superimposed on a place where a crack or a corrosion hole has occurred, and these are fixed to a steel sheet pile 52 by a stud 51 formed of a headed pin or a threaded pin. FIG.
(B) shows an example in which the joint 56 of the concrete block 55 constituting the seawall is covered with a belt-shaped sand-proof sheet 57 made of rubber or synthetic resin, and the sand-proof sheet 57 has a pressing member 58 made of a steel material thereon. It is fixed to the concrete block 55 with the studs 51 stacked.

The stud 51 penetrates the reinforcing member 53 or the repairing member 54 by the pressure of the combustion gas of the explosive, and passes through the steel sheet pile 5.
2 or through the pressing member 58 and the sandproof sheet 57 and into the concrete block 55.

[0005] A rivet gun utilizing the combustion gas pressure of gunpowder, which is widely known as a tool for driving a rivet into hard material such as steel or concrete, has an empty package loaded in a chamber at the tail end of a barrel. It can be broadly divided into those that fire by directly applying the combustion gas pressure of the explosive to the studs loaded in place in the gun cavity, and those that fire by indirectly acting through a piston included in the gun cavity.

[0006] In the former stud gun, the explosive energy is applied directly to the stud, so that the stud is fired at a high speed and can be completely driven into a hard and thick material. However, since the energy given to the stud is adjusted only by the amount of the explosive, there is a fear that not only excessive driving but deformation or breakage of the member may occur, but also an accident may occur depending on the location where the member completely penetrates. Therefore, the latter type of stud gun is currently used, which converts the energy of explosive into the kinetic energy of the piston and indirectly acts on the stud and fires at a low speed, and the energy given to the stud is the amount of the explosive. Since it is controlled by the mass of the piston, it is possible to easily perform a proper driving.

[0007] By using such a stud gun, FIG.
When the construction shown in (B) is performed, a normal driving gun can be used above the water surface L, but a driving gun having a water-tight barrel portion at least below the water surface L must be used. In that case, empty packages, pistons, and rivets are used to eliminate the inefficient and troublesome work of repeating the operation of pulling the fired rivet into the water and bringing a new rivet into the water for each firing. Japanese Patent Application Laid-Open Publication No. HEI 10-107572 discloses a cartridge barrel having a cartridge structure in which both ends are sealed with sealing members at the front and rear ends, and a large number of the barrels are brought into the water and the barrel is replaced each time a shot is fired. 12-60
No. 48 publication.

[0008]

The stud gun in which a piston is interposed between the empty packet and the stud is said to be less likely to overdrive and to be highly safe because the stud is fired at a low speed. On the other hand, when the reinforcing member 53 and the repairing member 54 shown in FIG. 4 (A) and the pressing member 58 shown in FIG. 4 (B) are thick, they are insufficiently driven and cannot be firmly fixed. To worry about Since these members 53, 54, 58 cannot be made thin because they secure the required strength, they should be provided with pilot holes and fired with rivets to allow proper driving. Conceivable.

However, in water, visibility is often poor, and it is extremely difficult to press the barrel against the surface of the barrel with the center axis of the barrel aligned with the pilot hole. There is a risk that the rivet will be bent and driven in, and will be fired at a position outside the prepared hole, resulting in insufficient driving.

The present invention has been made in order to solve such a problem, and has a watertight cartridge structure in which an empty packet, a piston, and a stud are loaded into a gun cavity, and both front and rear ends thereof are closed with sealing members. With a rivet gun that has a barrel that can be replaced each time it is fired, the barrel can be pressed against the pilot hole provided in the member easily and accurately even in poor visibility under water. Therefore, it is an object of the present invention to perform proper driving by driving a tack through a prepared hole with respect to a thick member.

[0011]

SUMMARY OF THE INVENTION The present invention comprises a cylindrical housing having a trigger at a tail end, a holding block having a firing pin and mounted axially movably in the housing, and seals provided at both front and rear ends. A medicine chamber filled with empty packages and a gun cavity filled with pistons and studs are watertight, and have a barrel which can be taken in and out of the housing from the tip and which is axially movable, and has a holding block and a barrel. By retreating and operating the trigger, the firing pin fires an empty package,
For an underwater working stud gun that drives a piston with the combustion gas pressure of gunpowder and drives a stud into an object, in order to solve the above problem, the tip of the stud is water-tightly penetrated through a sealing member provided at the tip of the barrel. It was made to protrude forward from the tip of the barrel.

[0012] The pilot hole is searched by moving the tip of the tack against the surface of the prepared member, and the leading end portion of the tack is inserted into the prepared hole, and the barrel end surface comes into contact with the surface of the member so that a stable posture is obtained. It can be seen that the tack matched the pilot hole. And the studs are pushed into the structure such as metal or concrete where the members are piled up through the prepared hole, so even if the members are made of thick steel material, they are pushed by the piston and fired at low speed The object of firmly fixing the member by appropriately driving the stud to be made can be achieved.

It is preferable that the tapered portion which transitions from the shaft portion of the stud to the sharp tip penetrates through the seal member, in order to ensure the watertightness of the penetrating portion.
In addition, the length of the studs protruding from the barrel end surface must not be larger than the thickness of the pilot holed member against which the barrel end surface is pressed, and the barrel end surface is pressed against the member surface in a stable posture. This is a preferred form for reliably firing the empty package.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. Referring to FIG.
A grip 2 formed in a shape suitable for holding by hand is fixed to a base end of the housing 1 by a screw (not shown). 1 is held by a grip 2 so as to protrude from a base end of the housing 1, and a finger-hung type trigger 5 is rotatably supported by the base end of the housing 1.

A holding block 6 is provided at the base end of the housing 1.
The holding block 6 is movable in the central axis direction of the housing 1 by a distance regulated by the screw pin 7 and the slot 8 of the housing 1 in which the screw pin 7 is fitted. The holding block 6 includes a fitting hole 9 opened forward, a firing pin 10 and a yoke 11, and the firing pin 10 has a base end facing the distal end surface of the firing tube 3 and a distal end inserted into the fitting hole 9. It is possible to appear from the bottom. The yoke 11 has two arms 11a and 11b which are rotatable and project rearward.
2, the distal end of one arm 11a is engaged with the distal end surface of the firing tube 3, and in this position, the other arm 11b is
And can be engaged.

A rear guide block 13 is fitted in the center of the housing 1, and a front guide block 20 is disposed at the front end of the housing 1 so that the front end portion projects forward of the front end surface of the housing 1.

The rear guide block 13 is fixed to the housing 1 and has a guide hole 14 having a diameter equal to the outer diameter of a barrel 31 described later. Also, this rear guide block 1
Reference numeral 3 denotes, for example, a ring member 15 through which a belt for hanging on an operator's shoulder is fixed, and a retaining pin 16 is held in a radial direction. The retaining pin 16 is the pressing spring 1
7, the distal end is urged to protrude into the guide hole 14, and the distal end escapes from the guide hole 14 by pulling the handle 18 provided at the base end.

The front guide block 20 is fitted and held on a thick annular support piece 19 fixedly fitted and fixed to the front end of the housing 1 with the front end surfaces thereof aligned, and has a diameter equal to the outer diameter of a barrel 31 described later. And a protection plate 22 is attached to the front end with the front end surfaces aligned.

Further, the rear guide block 1 of the housing 1
A cover body 24 is provided on the base end side of the cover 3. The cover body 24 has an insertion hole 25 having a diameter equal to the outer diameter of a barrel 31 to be described later, which is opened at the distal end, and a flange 26 at the distal end and an opening 27 having a smaller diameter than the insertion hole 25 at the base end. And a base end thereof is fitted into the fitting hole 9 of the holding block 6.

A first compression spring 28 is inserted between the rear guide block 13 and the front guide block 20.
The push spring 28 holds the front guide block 20 in a position where its flange 23 is pressed against the support piece 19. Further, between the holding block 6 and the cover body 24,
A second pressing spring 29 having a lower spring force than the first pressing spring 28 is inserted, and the pressing spring 29 is
6 holds the cover body 24 at the position where the cover body 24 is pressed against the rear guide block 13 and holds the holding block 6 at a position where the spring force of the pressing spring 4 is balanced.

Referring to FIGS. 1 and 2, the barrel 31 has a small diameter portion 36 formed on a part of the outer peripheral surface thereof.
A gun cavity 32 opening at the distal end surface and a gun cavity 32 opening at the proximal end surface
And a portion surrounding the proximal end of the drug chamber 33 is a small-diameter annular portion 34. The gun cavity 32 is loaded with a piston 37 and a stud 38, and the medicine chamber 33 is loaded with an empty package 39, and an enlarged step 35 formed at the tip of the gun cavity 32 is made of rubber or synthetic resin. A thick disk-shaped elastic sealing member 41 is tightly fitted and held.

The stud 38 has a head portion 38a at the base end and a shaft portion 3 having a uniform diameter.
8b and a well-known tapered portion 38c that transitions to a sharper tip. The tapered portion 38c penetrates the seal member 41 to penetrate water-tightly and protrude forward from the distal end surface of the barrel 31. . Seal member 4
1 works so as to be in pressure contact with the tapered portion 38c by water pressure when brought into water, and exhibits high watertightness. The protrusion length of the stud 38 is not larger than the thickness of a member having a pilot hole described later. The seal member 41 is used for the barrel 31.
It may be a cup-shaped one that is put on the tip of the camera, or a film-shaped one that is stuck to the tip face.

A seal member 4 provided at the rear end of the barrel 31
Reference numeral 2 denotes an inner cylindrical portion 42a which is pressed into the medicine chamber 33 in close contact with the outer peripheral surface of the proximal end portion of the empty package 39, and an outer cylindrical portion 42b which is fitted on the outer peripheral surface of the annular portion 34. And an annular plate portion 42c formed on the tail end surface of the annular portion 34,
In cooperation with the sealing member 41 at the tip, the gun cavity 31 and the chamber 3
3 is kept watertight, so that there is no fear that the explosives in the empty package 38 will come into contact with water and become unburnable. The seal member 42
May be a waterproof film such as a synthetic resin film, and this film covers the flange of the empty package 39 and is adhered to the tail end surface of the annular portion 34.

The barrel 31 is inserted into the guide hole 21 of the front guide block 20 and the guide hole 14 of the rear guide block 13 from the front of the housing 1 so that the outer cylindrical portion 4 of the seal member 42 is inserted.
2b is inserted into the fitting hole 25 of the cover body 24 until it is fitted into the opening 27 and hits the bottom of the fitting hole 25. At this time, the retaining pin 16 is fitted into the small diameter portion 36 to prevent the barrel 31 from coming off, and the leading end of the barrel 31 projects slightly forward from the leading end surface of the front guide block 20.

FIG. 3 shows a concrete block 5 having a sandproof sheet 57 covering the joint of the concrete block 55 shown in FIG.
It is a figure explaining the procedure which performs the operation | work which sticks to 5 using the stud gun which concerns on the said embodiment. The pressing member 58 is a thick steel plate, and the shaft 38
a pilot hole 5 with a diameter equal to or slightly larger than the diameter of b
9 are provided.

The holding member 58 holds the tacking gun brought underwater.
3 (A) as shown in FIG.
The tip of 8 is brought into contact with the surface of the holding member 58 and moved in the same posture to search for the pilot hole 59. Tip of stud 38 is prepared hole 5
9B, the distal end portion fits into the pilot hole 59, and the distal end surfaces of the barrel 31 and the seal member 41 come into contact with the surfaces of the pressing member 58, as shown in FIG. It can be seen that the stud 38 matches the pilot hole 59.

Next, when the housing 1 is pressed toward the pressing member 58, the first pressing spring 28 is compressed, and the front guide block 20, the barrel 31 and the cover 24 are relatively moved to the base end of the housing 1. Move towards. This movement compresses the second pressing spring 29 to move the holding block 6 toward the base end of the housing 1 and at the same time,
1 pushes the firing cylinder 3 backward. The arm 11 b of the yoke 11 engages with the trigger 5 when the protective plate 21 is almost in contact with the support piece 19 and the cover body 24 is fitted into the fitting hole 9 of the holding block 6 until it contacts the bottom of the hole. In this state, when the trigger 5 is pulled, the yoke 11 rotates and the arm 11a is disengaged from the firing cylinder 3, and the released firing cylinder 3 advances by the spring force of the pressing spring 4 to operate the firing pin 10. Fire the empty package 39.

As a result, the explosive in the empty package 39 is burned, and the piston 37 is driven by the gas pressure, thereby pushing out the stud 38 placed in front of the gun 37 from the gun cavity 32. The stud 38 penetrates the sandproof sheet 57 through the prepared hole 59 and passes through the concrete block 5.
Driven to 5. At this time, since the energy of the explosive is applied to the stud 38 via the piston 37, the energy of the explosive passes through the pilot hole 59 even though the driving force is smaller than that which is directly applied to the stud 38. By being driven into the sandproof sheet 57 and the concrete block 55, even if the holding member 58 is a thick steel material, the head 38a
Can be driven into the state shown in FIG.

When the holding member 58 is a thin steel plate or a fiber-reinforced synthetic resin plate which can be easily penetrated, it is preferable to provide the pilot hole 59 and drive the stud 38 into it. By adjusting the amount of the explosive in the empty package 39 and the mass of the piston 37, it is possible to perform the same appropriate driving as in the case of the thick steel plate.

After the driving is completed and the pressing member 58 is separated from the surface of the pressing member 58, the firing cylinder 3, the holding block 6, the front guide block 20, the cover body 24 and the barrel 31 are pressed by the pressing springs 4, 28,
1 returns to the position shown in FIG. 1 by pinching the barrel 31 protruding from the front end surface of the front guide block 20 and pulling the barrel 31 so that the barrel 31 can cover the cover body 24,
It is separated from the rear guide block 13 and the front guide block 20.

Therefore, in operation, a single rivet gun and a large number of barrels 31 having a watertight cartridge structure are brought into the water, and the barrel 31 is exchanged each time the gun is driven. Driving work can be performed.

[0032]

As described above, in a watertight cartridge structure in which a piston is interposed between an empty packet and a stud and the front and rear ends of the barrel loaded with these are sealed with sealing members, According to the present invention, the seal member at the barrel tip is penetrated in a water-tight manner and protrudes forward from the barrel tip face. The tack can easily and accurately match the pilot hole with respect to the one that compensates for the drop in driving force of the gun. Therefore, when a large number of barrels are brought into the water, the barrels are changed each time a shot is performed, and work is performed while diving, it is possible to efficiently and continuously perform accurate and appropriate shots even in poor visibility water. It is.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

FIG. 2 is a partially enlarged longitudinal sectional view of a barrel in the embodiment of FIG. 1;

FIG. 3 is a partial longitudinal sectional view showing a driving procedure in the order of (A), (B), and (C).

FIGS. 4A and 4B are partial perspective views showing examples of different structures using a stapling gun.

[Explanation of symbols]

1 housing, 5 trigger, 6 holding block,
10 firing pin, 31 barrel, 32 barrel, 33 chamber, 37 piston, 38 tack, 39 empty package, 4
1,42 sealing member,

Claims (3)

[Claims] 1. An empty package is loaded by a cylindrical housing having a trigger at a tail end, a holding block having a firing pin, which is axially movably mounted in the housing, and sealing members provided at both front and rear ends. The gun chamber loaded with the chamber and the piston and the stud is watertight, and has a barrel which can be inserted into and removed from the tip of the housing and is movable in the axial direction, and the holding block and the barrel are retracted. By operating the trigger, the firing pin fires the empty packet, and drives the piston with the combustion gas pressure of gunpowder to drive the tack into the target. A part is protruded forward from a tip end surface of the barrel by penetrating a seal member provided at a tip end of the barrel in a watertight manner. 2. The underwater working tacking gun according to claim 1, wherein a tapered portion that transitions from a shaft portion of the tack to a sharp tip penetrates the seal member. 3. The underwater water according to claim 1, wherein a length of the stud protruding from the barrel tip surface is not larger than a thickness of a prepared member with a prepared hole against which the barrel tip surface is pressed. Working tack gun.