DE3830138A1 - Nailing machine - Google Patents

Abstract

Nailing machine with a cylinder housing (2), which receives a cylinder (27) which displaceably receives a piston (26) which is connected to a source of compressed flow medium for moving the piston within the cylinder (27), and with a nailing-machine body (1) which has an integral handle section (3). A nail container (4) and a nail-feeding device (4a) work together in such a way that they feed a nail to the driving-in section (6) of the nailing machine. A damping device (5) is arranged in such a way that it collides with the lower face of the piston (26) during the nailing. The cylinder housing (2) is coupled to the nailing-machine body (1) in order to be movable in the nail-driving direction. A nail drive (25) is connected to and moves integrally with the piston (26). A connecting chamber with compressed flow medium is formed between the handle section (101) and the nailing-machine body (1) in order to move the piston (26) and in so doing the nail is driven in a nail-driving direction (Fig. 1). <IMAGE>

Description

Background of the Invention

The present invention relates to a nail machine and a holder, and in particular a nailing machine and a holder in which a compressed fluid is used to drive a part in the nailing machine to drive a nail.

Certain types of nail machines use nails powered by a drive in a piston is installed, which in turn within a cylinder by means of a compressed high pressure Fluid is driven. The fluid will quickly into an upper section of the cylinder inserted so that the piston inside the cylinder by the pressure of the compressed fluid is driven down to drive in a nail that is arranged in a drive-in section to thereby Nail in the direction of and into a workpiece to be driven to drive. However, the pressure caused by this in the  Cylinder-introduced high pressure fluid exerted will, not just on the top surface of the piston to drive this down also on the opposite top bottom surface of the cylinder. Accordingly, the cylinder is driven by the recoil force the fluid pressure moves upward, so that Cylinder housing tends to jump up and down the front end of the driving section of the Separate the surface of the part to be driven so that it is difficult to carry out an exact driving in.

In order to avoid such a jumping upwards, can the nailing can be done while the top Section of the cylinder housing by hand down is pressed. However, the driving depth of the Nagels depending on the strength of the pressure force, and accordingly changes with conventional nail machines the depth of penetration of the nail depending on whether the cylinder case is pressed or not, and, when it is pressed, the driving depth changes according to the strength of the pressure force. For example se a plasterboard nailed to a wooden surface, so the nail head extends too far from the surface out of the gypsum board or sinks into the gypsum board deep, leaving a sheet of paper on the surface the plasterboard is provided, destroyed. Is the If the nail head protrudes too far, the nail head interferes with the Process of covering the plasterboard with tissue. Sinks if the nail head is too wide, the shape-maintaining force goes the plasterboard lost. Therefore, with conventional Nail machines control the depth of penetration of the nail difficult. It is therefore desirable to have a nail machine ne to have the nail always exact and even is driven to a certain depth.

Generally, operation recoil results a nail machine from it when turned into the cylinder led compressed air to the top surface of the nail drive part  les inside the cylinder acts around the drive part move down, and the compressed air acts as Recoil force on the top walls of the cylinder to the Move cylinder up. Will the nail machine moved up by the recoil, so a lower one Dead center of the nail drive part moves upwards, so that the impact is reduced. Of course you can the impact of recoil by a worker is reduced be the nailing machine to be driven Part presses to the degree of displacement of the nail machine ne to control. However, in this situation uniform driving impossible because of the driving force changes according to the strength of the pressure force.

Generally in conventional nailing machines for driving a nail with a round one enlarged head section the inner diameter of the Nose section to drive out the nail a little larger than the diameter of the head portion of the Nail. Because the front end section of the nail is free can move within the nose section, the Nail driven at an angle. This tendency is with one Plasterboard nail remarkable, its head diameter larger than that of an ordinary nail. Furthermore with plasterboard you need a nail that fits into one vertical arrangement driven much more precisely must be considered an ordinary nail, since reinforcement pa pier on the surface of the plasterboard by the edge an angled nail head can be broken.

For this reason, a stop guide mechanism was developed for guiding the front end portion of a nail that from the nose section of the nailing machine to the central part tion of the nose section is expelled and for Holding the nail in a vertical position, proposed, for example, as in Japanese Patent Exam Publication No. 56-20153 (1981) is described. However, since the nail holding guide mechanism  nism inside the nose section of the nailing machine is provided, the outer diameter of the nose cut pretty big, and it's difficult to make sure where the nail drive section is located.

As a result, the handling of the nailing machine is somewhat difficult to eat.

The same technique as previously described is also in the unchecked publication of the Japanese Utility Model 51-79 783 (1976). Since the nail-holding guide mechanism is partly from the out the front end of the nail expulsion nose section protrudes, the holding guide elements are arranged such that they are in direct contact with the surface of the part to be collected. For example, if Position of the nose section laterally offset, see above the holding guide elements are opened so that the Nail can be inclined. For example, the nail expelled quickly, the corresponding holding Guide elements opened spontaneously.

Since the nailing machine has no facilities, the Prevent opening of the corresponding items an elastic part that holds the elements in the lock forced, overly tense and displaced. As a result the durability will deteriorate.

Summary of the invention

It is an object of the present invention to provide a nail measure machine for driving a nail in uniform To provide depth.

It is also an object of the present invention to provide a recoil-free nailing machine in which no compression spring has to be used, which serves to to return the body to the lower end point so that  the machine can be small in size.

It is also an object of the present invention to provide a recoil-free nailing machine in which the Air supply mechanism between the handle portion and the Body in a simplified construction is so that the body glides smoothly, and the durable speed is improved.

It is also another goal of the present Invention to provide a recoil-free nailing machine len, in which the movement of the body be carried firmly can, and in which the air supply / discharge between the Handle section and the body without using a outer pipeline can be executed.

These and other objects of the present invention will be achieved achieved by a nailing machine that has a cylinder housing comprises a piston which is driven by a drive Driving in a nail, a cylinder that is slidable picks up the piston, and a pressure valve for control gated supply and discharge of compressed air in and out of Cylinder is provided; a nail machine body that integral a handle, a nail container, a nail Guide device for feeding a nail to a nail drive section, a damping device arranged therefor is to collide with a lower surface of the piston in order to avoid the impact of the piston at the time of Absorbing nailing includes, and a nail drive section from which the nail is driven out, the this section using the nail feeder was supplied, wherein the cylinder housing with the Nail machine body is coupled so that it is in a nail driving direction is movable so that the Piston inside the cylinder by compressed Fluid can be driven to the bottom Drive to drive a nail in.  

In the nailing machine described above according to the first Aspect of the present invention is in practice of the nail driving process of the pistons within the Cylinders by compressed fluid flowing into the Cylinder is initiated, driven down, and to at the same time, the cylinder housing by the recoil force of the compressed fluid upwards raised. However, since the cylinder housing in the Nagelan drive direction displaceable relative to the machine body is, the nail machine body remains, in contrast to that moving upward cylinder housing quietly, so that the Driving section also in one with the drive the part contacting position can be held. As a result, you can nail exactly. Since the Nail machine body not moved, there is no need ability to push it by hand. Since the further does not change the depth of penetration of the nail in Depends on whether the body is pressed by hand or is not pressed, the nail can always be constant Depth of penetration.

A second embodiment of the first aspect includes a first movable tubular body for connecting a Trigger valve of the nail machine body with one end of the pressure valve of the cylinder housing in this way supply a nail drive signal to the pressure valve; they also includes a second tubular body, which in the Nail machine body is arranged to be a supply source of compressed fluid with the opening of the Cylinder of the cylinder housing and the other end of the Connect pressure valve.

Since the first and second movable tubular bodies for Connection of the nail machine body to the cylinder the relative movement of the nail machine body and of the cylinder housing can absorb Always operate the nailing machine quietly.  

A third embodiment of the first aspect of the Invention comprises a spacer with which the relative distance of the nail machine body and the Cylinder housing can be kept constant at all times can. Because the nail machine body and the cylinder housing with the aid of the spacing devices in a predetermined Position each other after they are out moved relative to each other during the nailing process the machine can always be operated quietly.

A second aspect of the present invention includes a handle portion with an initial release valve; one Body with a nail drive part that slides in the body is provided, the handle and the body movable relative to each other in a nail drive direction device are arranged; and a connecting air chamber for Compressed air between the handle section and the body, the air chamber different effective areas has to force the body to move towards to move to a nail drive side while using compressed air to flow into the body within the air chamber, whereby in this way the drive part is driven.

As previously described, the recoil free Nailing machine according to the second aspect of the present Invention the connecting air chamber between the handle cut and formed the body so that the connection between the handle section side and the body side can be maintained even though the body moved relative to the handle portion. Since the air supply / discharge between the handle section and the body without an external piping system can be implemented the body can move calmly and relieved thus maintenance and improved durability.

Due to the difference in the effective areas in the connection The chamber for the compressed air becomes the body itself moved during the nailing process by feeding  Compressed air in the connection air chamber in its original position returned. For this reason, the second embodiment no compression spring to the body to force it to its original position in the Nailing machine according to the first aspect of the present Invention to get back. As a result, the machine be reduced in size.

A second embodiment according to the second aspect of FIG The present invention includes: a nose section, which forms a nail driving exit, a release valve to control the initial air, and a hollow handle cut that with the supply source for the compressed air connected is; a body with a cylinder for slidable recording of a nail drive part and a pressure valve which is arranged so that it through the supply and discharge of the compressed fluid from Trigger valve can be opened and closed to the flow of air for the nail drive part too control, with the body in a nail drive direction relative to the nose section is carried, and in an annular section which in the handle portion is formed to fit from to be worn on the annular portion; and a sliding seal that is between the body and the annular section is provided so that the Initial air from the trigger valve and the pressurizing Air from the handle section with the body through the Sliding seal in communication.

In the recoil-free nailing machine according to the second Embodiment of the second aspect of the present Invention, the body moves relative to the handle cut and the nose section when a nail is driven becomes. However, since the body is engaging between the nose portion and the annular portion a fixed bracket can be achieved. Of others communicate within the aforementioned  Limits to the relative movement of the initial air path and the initial air chamber with each other through the sliding seal tion, the air chamber in the handle portion, and the main air chamber also through the sliding seals communicate with each other. For this reason, the Connection between the initial air path and the initial air chamber and the connection between the air chamber the handle section and the main air chamber despite the relative movement of the body can be maintained. Because the air supply and exhaust between the handle section side and the body side without an external piping system can be made, the body becomes calm moved, this makes maintenance easy and improves durability.

According to the third aspect of the present invention the nailing machine comprises a drive part for driving out a nail; a nose section with a drive path for slidably receiving the drive part therein; and a safety device that has a cylindrical Has engaging portion at a front end of the nose section is arranged, the cylindrical Usually takes a position in which he protrudes further than the front end of the nose cut, which is the surface of a to be driven Part touches to in the axial direction of the nose to be movable and around the nose section include.

The nail holder includes: a plurality of nail guides elements on an outer perimeter in the front End of the nose section are provided and correspond have corresponding front end portions that continue protrude as the front ends of the nose section, and are pivotable to in a driving position in the Direction of the extension of the drive path of the nose cut an open and closed position to be able to take, and to a different exit position from the direction in which the drive path extends,  to be able to take; and an elastic device with who are forced to move in to move the closed position so that it enables a nail within the drive path to hold inside the guide elements, and when the engaging portion of the safety device that with a surface of the part to be driven in Connection is in the axial direction of the Moved nose section, the guide elements are in the Inside of the nose section added to the Guide elements that are opened for nail driving are to record.

In the nail holder of the nail machine according to the third Aspect of the present invention are the corresponding front end portions of the guide elements usually in a closed position. For this The reason for this is at the beginning of the nail driving process front end of the nail within the drive path of the Nose section through the front end sections of the Guide elements gripped so that the shaft section of the nail is held in the center of the drive path. Accordingly, the nail is exactly in the axial Driven towards the nose section.

Furthermore, the plant section lies with the three touching part when the nail comes out of the nose cut is driven out, and moves in the axial direction of the nose section, so that the safe device is released. After loosening the safe Unit device, the drive part is driven to to hit the nail. The nail then forces them Guide elements to open quickly, and the nail is then driven out of the guide elements. Although the guide elements open quickly, they become from the inner surface of the plant section added so that the opening process of the guide element ment is limited. Because of the elastic devices  none so unnatural for moving the guide elements Liche stress is exercised that the elastic Limits can be exceeded, the durability be improved.

Furthermore, the plant section of the security pre direction, as in conventional nailing machines is also used in this embodiment without Modifications are used. Accordingly, there is no need for the outer size of the nose cut to enlarge, so that the usability is not diminished.

Description of the drawings

Other features and advantages of the present invention are described in conjunction with the accompanying drawings, wherein represents:

Fig. 1 a longitudinal section of a nailing machine as a first embodiment of the present invention;

Figure 2 is a planar sectional view for explaining a Nagelzuführvorrichtung a container of the nailing machine.

Fig. 3 is a longitudinal section of a recoil-free nailing machine as a second embodiment of the present invention;

Fig. 4 is a side view, partly in section, showing a main part with relative movement of a body;

Fig. 5 is a side view showing the entirety of the nailing machine;

Fig. 6 is a side view of a nail holder of a nailing machine in longitudinal section according to a third embodiment of the present invention; and

Fig. 7 is a front view of the nail holder.

Detailed description of the preferred embodiment men

A first embodiment of the present invention will be described with reference to the drawings.

Fig. 1 shows a compressed air-powered nailing machine A, which consists essentially of a nailing machine body 1, and a cylinder housing 2.

The nail machine body 1 is by the one-piece combination of a handle 3 , a nail container 4 , a nail feed device 4 a , with which a nail is fed to a driving section, a damping device 5 , which is arranged to collide with the lower surface of a piston and thereby absorb the impact generated by driving a nail, and a driving section 6 for driving a nail, which was fed by means of the nail feed device 4 a .

The above-mentioned handle 3 is hollow and includes a compressed air inlet 8 which is formed on a base end portion of the handle 3 and is in communication with a compressed air supply 7 , the other end portion 9 , which is opposite to the compressed air inlet 8 , being open. A first air path 10 is formed above the other Endab section 9 in Fig. 1, so that one end of the first movable tubular body 11 is slidably fitted in the first air path 10 , and a drain valve 14 is provided under the other end portion 9 . Within the handle 3 , the respective ends of a second movable tubular body 12 and a second air path 13 are connected to the above-mentioned compressed air inlet 8 . The second movable tubular body 12 is flexible and extends with its other end outwards from the handle 3 through the other end section 9 . The other end of the second air path 13 is connected to the first air path 10 through the release valve 14 .

The trigger valve 14 controls the supply and discharge of the compressed air to and from the first air path 10 and presses a valve tappet 15 inward against the spring force which forces the valve tappet 15 outward from the handle 3 , thereby removing the valve body 16 , which is in a Position in which the first air path 10 and the second air path 13 are connected to each other, in a position in which the second air path 13 is closed and the compressed air in the first air path 10 is discharged into the atmosphere from an outer peripheral portion of the valve lifter 15 becomes. A trigger lever 42 is arranged opposite a contact arm 17 , which is provided on the nailing machine body 1 .

A housing section 18 for receiving nails connected to one another with a winding and a nail path 19 which extends from the housing section 18 to the nail driving section 6 are provided under the handle 3 . The provided with the nail feeder 4 a nail container 4 is arranged in the vicinity of a front end portion of the nail path 19 . As shown in Fig. 2, the nail feed device 4 a is arranged such that it is supplied with compressed air through an opening portion 21 , and thereby presses a feed piston 20 against the spring force in the nail feed direction back into a nail feed cylinder. Accordingly, a feed pawl 43 , which is rotatably disposed in the front end of the feed plunger 20 , is moved from one side to the other as shown in FIG. 2, thereby feeding the connected nails to the nail path 19 forward one by one.

The driving section 6 comprises a nail driving path 23 , which is open to the front end of the nail path 19 of the nail container 4 . A force-exerting part 17 a of the contact arm 17 is arranged in the front end of the driving gear of the driving section 6 . Furthermore, a large diameter portion 23 and a small diameter portion 24 are integrally formed with each other by means of a step portion 44 on a support portion (as shown in FIG. 1) of the driving portion 6 , and the damper 5 is provided within the large diameter portion 23 .

The cylinder housing 2 includes an integral combination of a piston 26 provided with a drive 25 for driving a nail, a cylinder 27 which slidably receives the piston 26 , and a pressure valve 28 with which the inlet and outlet of the compressed air into and out of the Cylinder 27 is checked. The cylinder housing 2 is arranged so that it is movable in the driving direction of the nail.

The nail drive 25 is the above-mentioned Eintreibab section 6 of the nail machine body 1 opposite, and the piston 26 is arranged so that its lower side of the damping device 5 of the nail machine body 1 is opposite.

An opening 29 is formed in the side wall of the cylinder housing 2 , opposite the handle 3 . A main air chamber 30 and a check air chamber 31 are formed between the cylinder 27 and the cylinder housing 2 . The opening 29 communicates with the main air chamber 30 . An end portion of the second movable tubular body 12 is fitted in the opening 29 . The main air chamber 30 communicates with the cylinder 27 through an inflow port portion 32 for compressed air. The non-return air chamber 31 communicates with the interior of the cylinder 27 by means of a through-hole 33 in connection and communicates with the opening portion of the Nagelzuführvorrichtung 4 a by a flexible, third movable tubular body 34th

The pressure valve 28 is net angeord above the cylinder 27 . One end (upper surface in Fig. 1) of a valve body 35 located in a valve cylinder 36 is disposed in an upper space 36 a of the pressure valve, and the other end (lower surface in Fig. 1) is arranged so that it is the inflow portion 32 of the compressed air is opposite to the main air chamber 30 conditions. The upper space 36 a of the pressure valve 28 is through the first movable tubular body 11 with the first air path 10 of the nailing machine body 1 in connection. An end portion of the first movable tubular body 11 is fixed in the upper space 36 a of the pressure valve, and the other end portion is slidably fitted in the first air path 10 . The pressure valve 28 closes the inflow section 32 for the compressed air by the pressure difference between the air pressure exerted by the first movable tubular body 11 on one end of the valve body 35 and the air pressure exerted by the main air chamber 30 on the other end of the valve body 35 is when the compressed air is passed from the first movable tubular body 11 to the upper space 36 a . The pressure valve 28 opens the inflow portion 32 of the compressed air by reversing the pressure difference between the air pressure applied from the first movable tubular body 11 to one end of the valve body 35 and the air pressure applied from the main air chamber 30 to the other end of the valve body 35 when the compressed air is discharged from the upper space 36 a to the first movable tubular body 11 . Therefore, the pressure valve 28 controls the inlet and outlet of compressed air from and to the main air chamber 30 to and from the cylinder 27 .

An exhaust valve 37 is arranged to discharge compressed air introduced into the cylinder 28 from the main air chamber 30 through an exhaust hole 38 . The upper surface of the piston 26 communicates with the atmosphere when the pressure valve 28 has reached bottom dead center. This means that the outlet valve 37 is connected to the pressure valve 28 by a spring 39 so that the outlet hole 38 is open when the outlet valve 37 is in the normal position. The outlet valve 37 is moved to a different position when the outlet hole 38 is closed. The outlet valve 37 is moved by spring force when the pressure valve 28 opens the inflow portion 32 for compressed air.

On a nail end portion of the cylinder housing 2 , a cylindrical portion 40 is formed coaxially with the drive 25 , and an inner step portion 44 is formed at its front end between a large diameter portion 23 and a small diameter portion 24 of the nailing machine body 1 . The cylindri cal portion 40 engages the large diameter portion 23 and the small diameter portion 24 of the nailing machine body 1 from the outside thereof. A compression spring 41 is formed between the step portion 44 and a step portion 45 at the front end of the cylindrical portion 40 of the cylinder housing 2 . Therefore, the nailing machine body 1 and the Zylinderge are casing 2 coupled to each other to thereby the direction in nail drive to be movable against the compression spring 41, and the mutual position of the nailing machine body 1 and the cylinder housing 2 is kept constant by the pressure spring 41, so that the compression spring 41 as Spacer acts.

In operation, before the nail driving process, compressed air is supplied by the compressed air supply device 7 not only to the main air chamber 30 , but also to the upper space 36 a of the pressure valve through the release valve 14 via the second air path 13 or via the first air path 10 . For this reason, the opening portion 32 between the cylinder 27 and the main air chamber 30 is kept closed by the valve body 35 . Next, when the trigger 42 is pulled while the front end of the driving portion 6 of the nailing machine body 1 as well as the contact arm 17 presses on the surface of the workpiece to be driven, the trigger valve 14 is operated to discharge compressed air into the upper space 36 a of the pressure valve . Therefore, the valve body 35 of the pressure valve 28 moves to the position where the opening portion 32 is opened to thereby supply compressed air from the main air chamber 30 into the cylinder 27 . Compressed air acts on the upper surface of the piston 26 so that it is driven downward, thereby driving a nail, which has been supplied to the driving section 6 , into the part to be driven. However, if compressed air is introduced into the cylinder 27 , the compressed air acts not only on the upper surface of the piston 26 but also on the upper bottom surface of the cylinder 27 by the recoil force of the compressed air therein, so that the cylinder housing 2 is raised in a direction which is opposite to the nail driving direction. Although the cylinder housing 2 jumps up in response to the spring force, the driving portion 6 integrally formed with the nail machine body 1 is kept in contact with the surface of the workpiece to be driven because the cylinder housing 2 and the nail machine body 1 are connected to each other in the above-mentioned manner are combined. In this way, the impact is absorbed when driving in a nail, so that precise nailing is always possible. In addition, since the nail machine body 1 does not move, it is not only unnecessary to hold the nail machine body 1 by hand, but it is also always possible to drive a nail with a constant depth because the driving depth no longer changes depending on whether the Nagelma machine body 1 is now held by hand or not.

Air inside the cylinder 27 below the piston 26 is compressed and introduced into the check air chamber 31 through the through hole 33 when the piston 26 is moved down so that the compressed air is carried from the third movable tubular body 34 to the cylindrical portion 40 to thereby actuate the feed plunger 20 , which supplies the driving-in section 6 with another nail after the above-mentioned nail driving-in process is completed.

When the cylinder housing 2 moves relative to the nailing machine body 1 as described above, the second and third movable tubular bodies 12 and 34 can easily follow the above-mentioned relative movement, and the first movable tubular body 11 , which is the upper space 36 a of the pressure valve 28 verbin det with the trigger valve 14 , the above-mentioned relative movement can absorb by a displacement within the first air path 10 ren.

Further, since the nailing machine body 1 and the cylinder housing 2 are arranged in predetermined positions by the compression spring 41 after the nail driving operation, it is possible to make the operation of the machine always quiet.

In addition, the range of movement of the cylinder housing 2 is fixed relative to the nail machine body 1 so that the piston 26 is moved in the driving direction to meet the damper 5 before the cylinder housing 2 moves and reaches its top dead center. This is done so that the nail machine body 1 can be raised after the piston 26 has hit the damping device 5 , when the cylinder housing 2 has already moved and has reached its top dead center when the piston 26 strikes the damping device 5 .

A second embodiment of the present invention will be described with reference to the drawings.

Fig. 3 shows a recoilless nailing machine A. This nailing machine A is driven with compressed air. In this machine A , a handle portion 101 and a nose portion 102 are integrally formed with each other. A body 106 provided with a cylinder 104 , which slidably receives a nail driving part 103 and a pressure valve 105 for controlling the driving air for the nail driving part 103 , is slidably supported in the nail driving direction by means of an annular portion 107 formed in the portion 101 .

A connection inlet 109 following a Preßluftver supply source 108 is formed such that it opens into a base end portion of the handle portion 101 , and an air outlet 110 is formed for opening in the other end portion, so that the connection inlet 109 and the air outlet 110 with corresponding inner air chambers 111 communicate. A release valve 112 is hen in the handle portion 101 . The trigger valve 112 is connected to one end of a first initial air path 113 . The other end 113 a of the first initial air path 113 opens to a section above the air outlet 110 .

The trigger valve 112 controls the supply and discharge of the compressed air within the first initial air path 113 and is arranged such that it either opens or closes the first initial air path 113 to the air chamber 111 or to the atmosphere by means of a trigger lever 115, a valve tappet 114 which is pressed outwards by spring force, pressurized or pulled out.

The annular portion 107 is integrally formed on a side portion of the handle portion 101 , and the air outlet 110 and the first initial air path 113 open to the inner wall of the annular portion 107th

The nose portion 102 is arranged below the annular portion 107 , and integrally formed with the Griffab section 101 together with a magazine 117 . A driving-in outlet 116 is formed in the upper and lower direction in the nose portion 102 , and interconnected nails 118 in the magazine 117 are supplied to the driving-in outlet 116 by the nail feeding device (not shown). A large diameter portion 119 that receives a damper 135 therein is formed in a base portion (shown in the upper portion of FIG. 1) of the driving outlet 116 .

The body 106 , the pressure valve 105 and the cylinder 104 , which slidably receive the nail drive part 103 in a cylinder housing 120 , are formed in an integral connection with one another. A main air chamber 121 is formed between the cylinder 104 and the cylinder housing 120 , and a second initial air path 122 and a check air chamber 123 are formed above and below the main air chamber 121 , respectively. Furthermore, opening sections 121 a and 122 a , which communicate with the main air chamber 122 and the second initial air path 122 are formed in the cylinder housing 120 .

The pressure valve 105 is made of an elastic material and is provided in a section of the nailing machine A above the cylinder 104 . The upper surface of the Druckven valve 105 faces an upper space 126 which is connected to the second initial air path 122 . A peripheral edge portion of the lower surface of the pressure valve 105 and an opening portion of the center of the lower surface of the pressure valve 105 are opposed to the master air cylinder 121 and a forward end opening portion 127 of the cylinder 104 , respectively. The pressure valve 105 is opened or closed by the pressure difference, which is generated between the upper and lower surfaces by supplying or discharging the initial air, so that the cylinder 104 is optionally connected to the main air chamber 121 or to an exhaust path 128 . That is, the pressure valve 105 closes the cylinder 104 to the main air chamber 121 , as shown in Fig. 3, when the above-mentioned initial air is supplied, and the pressure valve 105 moves down, thereby locking the cylinder 104 to the discharge path 128 and open it to the main air chamber 121 when the initial air is exhausted.

The check air chamber 123 is arranged such that it communicates with the interior of the cylinder 104 via upper and lower through holes 129 and 130, in order to temporarily store compressed air which in the cylinder 104 through the lower surface of the Nagelan drive part 103 a of Nail drive part 103 was pressed, and through the upper and lower through holes 129 and 130 in the cylinder 104 by operating the nail drive with the help of the nail drive part 130 , was performed. The lower surface of the nail drive member 103 is pressurized with the stored th compressed air through the lower through hole 130 , thereby returning the nail drive member 103 to its top dead center after the nail drive member 103 has reached its bottom dead center and the above-mentioned cylinder 104 toward the trigger path 128 has opened.

The body 106 is received and carried by the annular portion 107 of the handle portion 101 , and a compressed air communication air chamber 124 is formed between the handle portion 101 and the body 106 .

The upper, middle and lower sliding seals 136 , 137 and 138 are suitably arranged between the body 106 and the ring-shaped portion 107 . The body 106 slides into the annular portion 107 within the above-mentioned range, so the opening portion 113 a of the first starting air path 113 and the second starting air path 122 a of the second starting air path 122 lie over the connecting air chamber 124 between the upper sliding seal 136 and the central sliding seal tung 137 opposite. The air outlet 110 of the air chamber 111 of the handle portion 101 and the open end 121 a of the main air chamber 121 of the body 106 are located between the central sliding seal 137 and the lower sliding seal 138 . The first starting air path 113 and the air chamber 111 therefore communicate with the second starting air path 122 , or the main air chamber 121 .

An outer diameter D 1 of a portion of the cylinder housing 120 , which delimits a lower portion of the second initial air path 122 , is formed larger than an outer diameter D 2 of another portion of the cylinder housing. Accordingly, the connecting air chamber 124 has a difference in the effective area which is applied by the compressed air, so that the force that moves the cylinder housing downward when compressed air is supplied to the connecting air chamber 124 due to the difference in the effective areas based on the Diameter differences mentioned above, works.

The above-mentioned body 106 is supported to be slidable in the nail driving direction toward the nose portion 102 , and is fitted in and carried by the annular portion 107 of the handle portion 101 . The large diameter portion 119 of the Nasenab section 102 is fitted into a cylindrical portion 131 which is formed in a nail-side end portion of the cylinder housing 120 of the body 106 so that the body 106 is slidable within a range L , with an inner annular step portion 131 a of the front end of the cylindrical portion 131 communicates with projecting engaging edges 132 and 133 formed in upper and lower portions of the outer circumference of the large diameter portion 119 . If the body 108 is carried by the nose portion 102 , the nail drive part 103 is arranged in the cylinder 104 such that it faces the driving outlet 116 of the upper space 126 of the body 106 , and the lower surface of the piston portion 103 a is the damping devices 135 of the body 106 arranged opposite.

In operation, prior to the nail drive actuation, compressed air from the compressed air supply source 108 is supplied not only to the air chamber 111 , but also to the upper space 126 of the pressure valve 105 through the release valve 112 and the first initial air path 113 . The pressure valve 105 is maintained for this reason, in one position, it shuts off in the cylinder 104 to the main air chamber 121 down and opens the cylinder 104 toward the vent path 128th Next, when the front end of the nose portion 102 of the body 106 is placed on the surface of the workpiece to be driven, and the trigger lever 115 is pulled to operate the trigger valve 112 , compressed air in the upper space 126 of the pressure valve 105 is released . and the pressure valve 105 moves into a position in which the cylinder 104 is closed with respect to the trigger path 128 and opened with respect to the main air chamber 121 . Then compressed air is conveyed from the main air chamber 121 into the cylinder 104 . Since the compressed air a nail driving portion 103 engages the upper surface of the nail driving part 103, which is cut Kolbenab 103 a to move down to drive a nail 118 against the Eintreibauslaß 116th The nail 118 is the foremost of the interconnected nails 118 that are fed to the nose portion 102 .

Compressed air is introduced into the cylinder 104, so it acts not only on the upper surface of the piston portion 103 a, a, but also to the upper bottom surface of the cylinder 104 by the repulsive force of the compressed air therein befindli chen. Therefore, the body 106 is raised in a direction opposite to the driving direction of the nail 118 as shown in FIG. 4. However, since the above-mentioned recoil force does not affect the handle portion 101 and the nose portion 102 , the nose portion 102 is kept in contact with the surface of the workpiece to be driven. Therefore, the force to drive a nail is absorbed, so that it is always possible to nail exactly. Furthermore, it is possible to move the body 106 smoothly because the body 106 is carried by the nose portion 102 and the annular portion 107 .

Even when the body 106 is displaced relative to the handle portion 101 and the nose portion 102 , the first initial air path 113 and the air chamber 111 in the handle portion 101 are inside with the second initial air path 122 and the main air chamber 121 through the sliding seals 136 , 137 and 138, respectively of the movement range of the body 106 in communication so that the above-mentioned connection is maintained.

If the release valve 112 is released after the nail has been driven in, compressed air in the air chamber 111 is conveyed through the first starting air path 113 and the second starting air path 122 into the upper space 126 of the Druckven valve 105 , so that the pressure valve 105 moves into one position wherein compressed air is discharged in the cylinder 104 through the vent path 128 in which the cylinder 104 is opened against the withdrawal path 128 and closed to the main air chamber 121, thus air 103 a of the nail driving portion 103 engages the lower surface of the piston section in the return air chamber 123 to return the nail driver to its bottom dead center.

If compressed air is directed into the second initial air path 122 of the body 106 , the body 106 is based on the difference in the effective areas between the upper and lower pressurized surfaces, based on the outer diameters D 1 and D 2 of the cylinder housing 120 , which forms the connecting air chamber 124 , pressed down to thereby return the cylinder housing 120 to an initial position as shown in FIG. 3. Furthermore, if a nail is fed into the nose section 102 via the nail feed mechanism, the next nailing process is prepared.

As described above, the body 106 , even if it shifts relative to the handle portion 102 and the nose portion 102 , is carried by the nose portion 102 and the annular portion 107 so that the body 106 is stably supported.

As described above, the communication air chamber 124 is formed between the handle portion 101 and the body 106 so that the connection between the handle portion 101 and the body 106 side can be maintained even when the body 106 moves relative to the handle portion 101 . Since the air supply and discharge between the handle portion 101 and the body 106 can be heard without providing an external pipe system, the body 106 is moved ben ben, thus facilitating maintenance and improving durability.

Since the difference in the effective areas of the compressed air is formed in the connecting air chamber 124 , the body 106 , which was moving at the time of the nailing, is returned to the initial position by applying compressed air to the connecting air chamber. For this reason, it is not necessary to provide a compression spring that forces the body 106 to return to the initial position, as is done in conventional nailing machines. As a result, the machine can be smaller.

Since compressed air in the connec tion air chamber 124 is discharged into the atmosphere through the release valve 112 when the nail is driven in, the acting force is also released in accordance with the difference in the effective areas. Therefore, the above-mentioned difference in the effective areas is not an obstacle to the relative movement of the body 106 . This is therefore carried out calmly.

As described above, the first initial air path 113 and the air chamber 111 in the grip portion 101 communicate with the second initial air path 122 and the main air chamber 121 through the sliding seals 136 , 137 and 138 within the range of the above-mentioned relative movement, respectively, so that the above-mentioned connection is maintained even when the body 106 is relatively moving. For this reason, it is possible that the sides of the handle portion 101 and the body 106 communicate with each other with respect to the supply and removal of air, so that the body 106 moves smoothly, thereby improving its durability as well as its ease of maintenance.

A third embodiment of the present invention will be described with reference to the drawings.

Fig. 5 shows a nailing machine A. In the nailing machine A , a body portion 202 is provided in the front portion of a handle portion 201 to be connected to a source of compressed air. A drive mechanism 204 for driving a nail hitting part 203 by means of compressed air and a start valve 205 for controlling the operation of the drive mechanism 204 are provided in the body portion 202 . A nose portion 206 is further provided in the lower end of the body portion 202 , and a drive path 208 that is open to a nail supply portion 207 and slidably receives the drive member 203 is formed inside the nose portion 206 . The drive mechanism 204 , as well as the start valve 205, are operated by operating a trigger 209 after a nail has been brought from the nail supply section 207 into the drive path 208 so that the nail is ejected by an impact of the drive member 203 being driven.

A safety device 210 is provided in the nailing machine A so that a nail magazine cannot be operated without the trigger lever 209 being operated. Similarly, the use in the conventional nailing machines th, comprises the safety device 210 has an arrangement in which a contact arm is provided slidable 211 in the axial direction of the nose portion 206, and the lower end of the contact arm 211 of the trigger lever 209 is opposed to and at a front end portion of Nose section 206 is arranged. Therefore, the actuation of the trigger lever 209 can not be performed before the lower end of the contact arm acts 211 through displacement of the contact arm 211 on the trigger 209 when the front end of the abutment section 212 is engaged, and is placed tee on the surface of collectible work.

The front end of the contact section 212 of the contact arm 211 , which forms the safety device 210 , is formed cylin drisch, and arranged so that it surrounds the nose section 206 . The front end of the abutment section 212 normally projects further than the front end of the nose section 206 , and can be moved in the axial direction of the nose section 208 while it rests on the surface of the workpiece to be driven.

As shown in FIGS. 6 and 7, two guide elements 213 are provided in a front end of an outer peripheral portion of the nose portion 206 . The front end portions 213 a of the respective guide elements 213 protrude further than the front end of the nose portion 206 . Base portions 213b are pivotally attached to pins 214 provided in the nose portion. The front end portions 213 a of the guide members 213 take a position a (shown by the solid line of Fig. 6), in which they close when the forward movement is in the direction in which the drive path extends 208 of the nose portion 206, and a position (represented by the dashed line in FIG. 6) in which they open when the retraction occurs in the direction of the drive path 208 . Torsion coil springs 215 are attached to the corresponding pins 214 so that they force the corresponding guide elements 213 into the closed position. When the guide elements 213 assume their closed position, the inner sides of the front end sections 213 a of the corresponding guide elements 213 form a cone.

A plurality of guide elements 213 can be provided (for example two or more) and the devices with which the guide elements 213 are forced into the closed position are not limited to torsion coil springs 215 , but can be any elastic devices.

Furthermore, the guide elements 213 are arranged further inside than the contact section 212 of the safety device 210 , and are designed in such a way that the contact section 212 receives the guide elements 213 inside when the contact section 212 moves in the axial direction of the nose section 206 during the System on the surface of the workpiece to be driven.

Interconnected nails 216 are generally used, which consist of a plurality of nails 216 which have been connected to one another by means of a connecting part.

In the above-mentioned arrangement, the nail 216 fits into the drive path 208 of the nose portion 206 when the nail 216 is driven. Next, the system section 212 of the safety device 210 comes into contact with and is held on the surface of a workpiece to be driven. The abutment portion 212 is moved in the axial direction of the nose portion 206 , so that the safety device 210 is released. The nail striking member 203 is driven by the release operation of the safety device 210 and the starting operation (the operation in which the trigger lever 209 is pulled) to strike the nail 216 . The front end of the struck nail 216 is received by the front end portions of the guide members 213 when the nail 216 is knocked out of the front end of the drive path 208 . As a result, the axial portion of nail 216 is held in the central position of drive path 208 . For this reason, the nail 216 is struck exactly in the axial direction of the nose section 206 .

If the nail 216 is hit by the nail striking part 203 , the nail 216 forces the guide elements 213 to open so that they are suddenly opened. However, at this time, the guide members 213 are received by the inner surfaces of the abutting portion 212 to thereby limit another opening operation. In this way, the torsion coil springs 215 which bias the guide elements 213 are not subjected to a destructive force which exceeds their elastic limits, so that their durability is improved.

Moreover, an abutment portion 212 at the front end of a safety device 210 as provided in conventional nailing machines can be used as an abutment portion 212 at the front end of the safety device 210 so that the outer shape of the nose portion 206 is not enlarged and its operability is not deteriorated.

Furthermore, the nail holder is particularly effective in Case of driving in nails with large head diameters ser.

While the invention in connection with what for at the moment as extremely practical and as preferred embodiments is described was, but must also be mentioned that the invention not only limited to the presented embodiments is, but on various modifications and can apply similar arrangements to the mind and correspond to the scope of the appended claims chen.

Claims (15)

1. A nailing machine that
a cylinder housing ( 2 ) which is integral with a piston ( 26 ) which is provided with a drive ( 25 ) for driving a nail,
from a cylinder ( 27 ) in which the piston ( 26 ) is slidably received, and
consists of a pressure valve ( 28 ) for the controlled supply and discharge of compressed fluid in and out of the cylinder ( 27 ), and
a nail machine body ( 1 ) which integrally from a handle ( 3 ), a nail container ( 4 ), a nail supply device ( 4 a ) for supplying a nail from the nail container to a nail driving section ( 6 ), in which a nail by the feed device ( 4 a ) from the container ( 4 ) was added, and with which such a nail is driven, and
consists of a damping device ( 5 ), which is angeord net that it meets the lower surface of the piston 26 to absorb the impact of the piston ( 26 ) at the time of nailing, the cylinder housing ( 2 ) with the nailing machine nenkkörper ( 1 ) is coupled to be movable in one direction along an axis in the nail drive direction, so that the piston ( 26 ) within the cylinder ( 27 ) can be moved downward by the compressed flow medium so that the drive ( 25 ) drives a nail. 2. A nailing machine according to claim 1, wherein the nailing machine body ( 1 ) further integrally has a columnar guide surface at an upper portion on the nail driving section ( 6 ), and the cylinder housing ( 2 ) further integrally has a cylindrical guide surface for receiving the columnar guide surface has in a lower portion of the cylinder housing, the cylinder housing (2) surface of the nail machine body (1) through the columnar guide surfaces and the cylindrical guide is supported such that the Zylinderge housing (2) along the axis in the direction of the nail drive is movable. 3. Nailing machine according to claim 1, wherein the Nagelma machine body ( 1 ) further comprises a trigger valve ( 14 ) which is operated manually for remote control of a pressure valve ( 28 ), and an inlet compressed fluid for receiving a compressed fluid from a supply source Fluid includes, the nailing machine further comprising:
a first movable connecting tube for connec tion of the trigger valve ( 14 ) with one end of the pressure valve ( 28 ) of the cylinder housing ( 2 ) to give the pressure valve ( 28 ) a nail driving signal; and
a second movable connecting pipe for connecting the inlet ( 8 ) compressed fluid with the other end of the pressure valve ( 28 ). 4. Nailing machine according to claim 3, characterized net that the second movable connecting pipe is flexible. 5. Nailing machine according to claim 4, characterized net that a first end of the first, movable Connecting tube slidable in a first Air path is arranged and parallel to the axis of the Nail driving direction runs. 6. Nailing machine according to claim 2, further comprising a spacer with which the nailing machine body ( 1 ) and the cylinder housing ( 2 ) are always in contact with each other. 7. Nailing machine according to claim 6, characterized in that the spacer is a compression spring, and that the cylinder housing ( 2 ) moves relative to the nailing machine body ( 1 ) along the axis in the direction of the nail drive, against the tension of the compression spring. 8. Nailing machine with a body and a handle part ( 101 ) in which the body comprises:
a cylinder ( 104 ) having an opening portion at one end,
a piston which is integrally provided with a drive ( 103 ) for driving a nail ( 118 ) and is slidably received in the cylinder ( 104 ),
a pressure valve ( 105 ) for controlling the opening and closing of the opening portion of the cylinder ( 104 ), and
a cylinder housing ( 120 ) integrally including the cylinder ( 104 ), the piston and the pressure valve ( 105 ); and
the handle portion ( 101 ) comprising:
a nose part ( 102 ) with a nail outlet ( 116 ), to which a nail ( 118 ) is fed in order to be driven in and through which the drive for driving in the nail ( 118 ) is displaceably moved,
a damping device ( 135 ) which is arranged on an upper end of the nose part ( 102 ) for receiving the piston, and
a guide surface which is formed as an inner peripheral surface of a cylinder and which receives the cylinder housing ( 120 ) of the body,
an outer peripheral surface of the housing being movably supported along the axis in the nail driving direction by the guide surface so that the body is supported by the handle member ( 101 ). The nailing machine according to claim 8, further comprising an annular communication air chamber provided between the guide surface of the handle member ( 101 ) and the outer peripheral surface of the housing, and in which a difference in the active surfaces of the upper and lower surfaces of the body, which is opposite the air chamber, so that the body is forced on the nail driving side at all times by means of air pressure. 10. Nailing machine according to claim 9, characterized in that
that the handle part ( 101 ) further comprises a release valve ( 112 ) for controlling the supply and discharge of the compressed air, the compressed air actuating the pressure valve ( 105 ), the release valve ( 112 ) being manually operable, and
that the annular chamber is arranged on an air path to connect the trigger valve ( 112 ) and the pressure valve ( 105 ) to each other. 11. Nailing machine according to claim 8, characterized in that
that the body further includes an air chamber divided on an outer peripheral surface of the cylinder to accumulate the pressure of compressed compressed air for driving a piston, and
that the handle member ( 101 ) further comprises a hollow portion ( 111 ) connected to a compressed air supply source ( 108 ), and
wherein a trigger valve ( 112 ) is manually operable to effect the supply and discharge of the compressed air for actuating the pressure valve ( 105 ), and wherein the nailing machine further comprises an air path which is connected by means of sliding seals ( 136 , 137 , 138 ) between the Guide surface of the body and an outer peripheral surface of the housing is divided to connect the trigger valve ( 112 ) and the hollow portion ( 111 ) with the pressure valve ( 105 ) and the chamber. 12. Nailing machine according to claim 11, characterized in that
that two annular, by means of the sliding seals ( 136 , 137 , 138 ) along an axis in a nail driving device Ausnehmungsab sections are provided within the guide surface of the handle part ( 101 ) in order to be connected to the hollow section ( 111 ) or the release valve ( 112 ) to become, and
that two opening portions, which are opposite the two annular recess portions and are insulated from each other in the axial direction, are provided within the outer peripheral surface of the body to be connected to the pressure valve ( 105 ) and the chamber. 13. Nailing machine with
a drive part ( 204 ) for driving out a nail ( 216 );
a nose portion ( 206 ) having a drive path for slidably receiving the drive member ( 204 ) therein;
a safety device ( 210 ) having a cylindrical abutment portion ( 212 ) located at a front end of the nose portion ( 206 ) and normally positioned to protrude further than the front end of the nose portion ( 206 ), and having a surface in Engaged to be movable in the axial direction of the nose portion ( 206 ) and to enclose the nose portion ( 206 );
a nail holder having a plurality of nail guide members ( 213 ) provided in the front end of the outer periphery of the nose portion ( 206 ), the nail guide members ( 213 ) each having front end portions which protrude further than the front ends of the nose portions ( 206 ) and pivoted so as to be able to assume a position between the open and closed positions, in the forward movement in the direction in which the drive path of the nose section ( 206 ) extends, and another expulsion position in the direction in which extends the drive path; and
an elastic means ( 215 ) which forces the guide members ( 213 ) to move in the closing direction to hold a nail ( 216 ) within the drive path ( 208 ) in these guide members ( 213 ), where, and if the abutment portion ( 212 ) of the safety device ( 210 ), which communicates with a surface of the drive part, moves in the axial direction of the nose portion ( 206 ), the guide elements ( 113 ) are arranged in the nose portion ( 206 ) such that the guide elements ( 213 ) are added, the guide elements ( 213 ) being opened for nail insertion. 14. Nailing machine according to claim 13, characterized in that the elastic device is a torsion coil spring ( 215 ). 15. Nailing machine according to claim 14, characterized in that the safety device ( 210 ) has a contact arm ( 211 ) which is displaceably movable in an axial direction of the nose section ( 206 ).