JPS6210786B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a method for marking, nailing, and hook tightening, which comprises an impact mechanism that is combined with a drive piston that is movable between the forward and backward positions of a cylinder, and that can be designed as appropriate as required. The present invention relates to an impact device or percussion device that performs such operations.

Various means such as compressed air as an energy source for driving the above-mentioned drive piston, devices for providing a power supply, or even an explosion suitable for being sucked into the cylinder and rapidly driving the impact mechanism to ensure that it performs its function. Devices using sex mixtures have already been proposed.

The Applicant is applying the name "Impact device, especially device for nailing, hook tightening, etc.", which uses an explosive mixture as an energy source to drive an impact mechanism by combustion.
French Patent No. 1229671 dated October 18, 1958 is proposed.

A variety of suitable devices have been developed using the above technology, but when it comes to commercially competitive and completely reliable configurations for industrial production and expansion, there are some disadvantages to the prior art. It is known to be defective.

The object of the invention is to provide a device of the above-mentioned type, the implementation and use of which is considerably simplified compared to previously known devices of the same type, and the reliability of its operation is significantly improved. It is in.

That is, the impact device for nail driving, hook tightening, etc. of the present invention includes a longitudinal member, a cylinder head that partitions the longitudinal member into a first housing and a second housing, and a cylinder head disposed inside the first housing and a second housing, respectively. a main drive piston 29 and an auxiliary piston 36 provided therein; an impact mechanism that engages the main drive piston and moves within a cylinder within the first housing; a device for igniting the mixture, a device for discharging the gas produced after ignition of the explosive mixture, and a device for actuating the igniter, the auxiliary piston in the second housing being in an upper end position of its stroke; The auxiliary piston is movable to and from a lower end position, with the auxiliary piston being supported in the upper end of its stroke position at the beginning of each working cycle and being supported in the lower end of its stroke position as it moves to the lower end of its stroke. The main drive piston is arranged to drive the main drive piston to the intermediate position, and movement of the main drive piston to the intermediate position creates a space between the main drive piston and the cylinder head, and the movement of the main drive piston to the intermediate position creates a space between the main drive piston and the cylinder head. resulting in the introduction of an explosive mixture, the space formed having a predetermined volume depending on the stroke of the auxiliary piston, which also accumulates a predetermined volume of fuel when in the upper end position of its stroke. and is arranged to convey said fuel into said space upon movement to a lower end position of said stroke, said conveyance of said fuel simultaneously resulting in the introduction of air into said air to displace said explosive mixture. It is characterized by being designed to generate.

According to a preferred embodiment of the device according to the invention, the auxiliary piston has a brewing chamber on one side of its inner axial or conveying valve and a plug chamber on the opposite side of this conveying valve. However, the plug chamber forms an intermediate volume between the combustion chamber and the brewing chamber.

Preferably, the conveying valve cooperates with a valve seat provided inside the auxiliary piston. Extending from the transfer valve are two drive rods, one of which extends into the brewing chamber and serves to control a fuel supply valve that allows fuel to flow into the brewing chamber.
The other drive rod extends into the plug chamber and serves, in cooperation with the main drive piston, to control the opening and closing of the delivery valve against the action of a spring.

Furthermore, in a preferred embodiment of the device according to the invention, the front end portion of the auxiliary piston cooperates with a central recess in the main drive piston. This central recess has a plurality of oriented passages, while the forward end portion of the auxiliary piston also has a plurality of suitably oriented passages. This makes it possible to create turbulence in the explosive mixture as it passes through these channels and to introduce it into the combustion chamber as a completely homogeneous mixture.

Also, in a preferred embodiment, the plug chamber has an anti-return valve therein to prevent combusted gases from returning into the blending chamber.

The device of the invention is suitable for simple and economical manufacture. Also, its use is extremely simple. That is, actuation of the trigger or pushbutton is sufficient to cause a complete actuation cycle, and after actuation the device returns to its initial position ready for a new complete cycle. Become.

The device according to the invention is therefore always ready to start.

The above-mentioned features are substantially made possible by the provision of auxiliary pistons that perform various major functions, such as: - adjustment of the gas volume at top dead center; - formation of an explosive mixture by the intake air during the descent of the auxiliary piston towards bottom dead center; - explosiveness in the combustion chamber formed by the descent of the main drive piston. Generation of mixtures. This downward movement of the main drive piston is caused by the auxiliary piston driving the main drive piston downwards: - the automatic return of this auxiliary piston to its initial locked position by an explosion in the combustion chamber; .

It can be seen that the device of the invention can be applied to a variety of applications. However, the application illustrated and described by way of example below is configured as a hook tightening device.

In the embodiment shown in FIG. 1, the device consists of a part 10 which, in combination with the device, constitutes a grasping handle, and a part or elongate member 11 which consists primarily of the percussion mechanism and the drive mechanism for this percussion device.

The section 10 is provided to accommodate a number of accessories, such as a fuel gas tank 12, a pressure reducing valve 13 associated with the gas tank, and an ignition coil 14. One of the ignition coils 14 is connected to an energy source in the form of a storage battery 15 and the other to an electrical circuit (not shown). This electrical circuit is provided within the combustion chamber and is connected to an ignition device 16, particularly as shown in FIGS. 2-7.

The gripping handle portion 10 is provided with a drive pushbutton, indicated generally by the reference numeral 20, and also a magazine 21 for nails, hooks, etc. 22.
It has come to consist of This magazine is
It is generally indicated at 23 and communicates with a driving head forming a driving guide device.

The elongated member 11 consists of a cylinder 25 closed at both ends by bottoms 26 and 27, in which a fixed cylinder head 28 is provided and an impact mechanism 3.
It houses the main drive piston 29 which is engaged with the main drive piston 29.

Between the main drive piston 29 and the bottom 27 the cylinder 25 has a helical spring 32 supported at a first end on the main piston 29 and at a second end on the bottom 27. . Main piston 29
is capable of strong reciprocating motion in the axial direction under the impact of an actuating mechanism generally designated 34. Said actuating mechanism 34 controls the piston 29 and thus the impact mechanism 30.
is driven from the upper position to the lower position, in the course of which it pulls out and drives the articles 22 from the magazine 21, after which the spring 32 moves both said parts (main piston and impact mechanism) to the first upper position for a new cycle. It works to return it to its original position.

As clearly shown in FIG. 2, the actuating mechanism 34 housed in the upper part of the cylinder 25 is formed by a secondary or auxiliary piston 36 coaxial with the axis of this cylinder, which auxiliary piston 36 is located above the The cap 37 is engaged with the cap 37 at a portion thereof. This auxiliary piston can slide in a bore 38 provided in the cylinder head 28 and equipped with a sealing packing 38A, and a spring 39 inserted between the cap 37 and the bottom 26 mentioned above, It is designed to press the cap. The activation handle PA, which projects this cylinder outward, engages with the cap 37 and thus with the auxiliary piston 36. This is because the auxiliary piston is connected to the cap. The handle PA is slidable through the disc by means of holes provided in the cap.

When the apparatus is activated, but at rest, the components are in the positions shown in FIGS. 1-3.

In these figures, the auxiliary piston 36 is shown in its upper end-of-stroke position and is maintained in this position by a strut 40 of elastic material which is connected in its lower part to the cylinder head 28.

The column described above (see especially FIG. 3) has a restraining stop formed by a shoulder 40A with an inclined surface 40B adapted to cooperate with the cap 37; It has an extension part 40C extending beyond the section. The extension 40C engages a first sleeve 42, referred to as the lower sleeve, which passes through a passage 26A in the bottom 26 of the cylinder and seats on the cap 37 by a flange 42A. ing. Also,
The lower sleeve 42 is fitted into a second sleeve 43, referred to as an upper sleeve, which has a flange 43A. The first spring 44 is connected to the above-mentioned flanges 42A, 4 provided facing each other.
3A, both ends are supported, while the second spring 4
5 is fitted between the flange 43A of the upper sleeve and the bottom 26 of the cylinder.

The first spring 44 acts to separate the two sleeves 42 and 43 from each other, and the second spring 4
The purpose of 5 is to apply thrust to both sleeves via the first spring 44.
For this reason, the sleeve 42 presses against the surface corresponding to the cap 37 by the flange 42A when the auxiliary piston 36 is in the upper end position of its stroke, as in FIGS. 1-3.

an opening 26A provided in the bottom 26 of the cylinder;
The opening 37A in the cap 37 for passing through the strut extension 40C has another function, which is to allow air to enter the cylinder to form an explosive air-fuel mixture within the combustion chamber. It should be noted that this is the case.

A boss 26E is formed on the outside of the bottom 26 of the cylinder, and the boss 26E is provided with both branches 51A and 51B extending to both sides of the pin 51, and is pivoted to swing around the pin 51. A motion transmission mechanism in the form of a fork 50 is provided.

The branch 51A is connected to the flange 4 of the upper sleeve 42.
Branch 5 forms a control forceps that cooperates with 3A.
1B is an aperture 5 through which the distal portion of the discharge valve rod 55A, indicated generally at 55, passes.
1C (Fig. 4).

Said valve 55 has, as usual, a valve head 55B for the purpose of co-operating with a seat 28A provided in the fixed cylinder head 28 and a conduit 28B communicating with the outside for discharging the burned gases. It is installed in the cylinder head.

Accordingly, the valve rod 55A extends from the cylinder head 28 through which it extends to above the upper surface of the bottom 26, so that the valve 55 is connected to the washer 59.
It is urged to close by a spring 58 fitted between the fork branch 51B and the fork branch 51B. The bushing 60 is fitted with the valve rod 55A, and the first of the two ends of the bushing contacts the branch 51B of the fork 50 and passes through openings provided in the cap 37 and the bottom 26 of the cylinder, respectively, while the first The two ends extend into discharge line 28B. The discharge valve 55 is therefore guided through the bush 60 in two places, adjacent to the valve head 55B and at the end of the valve rod.

Disposed within the discharge opening 28B is an operating finger 65 connected to a first end of an operating lever 66 extending along the cylinder;
The end is adapted to cooperate with a push button 20.

The operating finger 65 is attached to a shoulder 67 provided on the valve rod 55A adjacent to the head 55B.
and the corresponding end of bush 60 by end hatch 65A.

The push button 20 (FIG. 1) is adapted to engage with a projection 69 provided on the cylinder 25 by means of a screw 68 and to slide within this projection. This push button is pressed downward under the action of a spring 70. A spring 71 is engaged onto the lever 66, which spring 71 is slightly stronger than the spring 58 which engages the valve 55, and which is laterally secured to the cylinder 25 by a first end. supported part 2
5A, and the terminal boss 66A of the lever 66 is pressed at the second end. Furthermore, this boss is adapted to cooperate with a push button 20.

Therefore, the plurality of elements 66, 65, 60 and 50 constitute an operating device for opening the column 40 and closing the discharge valve 55 by means of the push button 20, and these operations may be performed simultaneously or with a slight delay. It is done.

Referring to the auxiliary piston 36, it has a rear end portion extending coaxially with the axis of the cylinder 25 and connected to the cap 37, and a front end portion cooperating oppositely with the main drive piston 29. We are prepared.

The rear end portion of the auxiliary piston is connected to the cap 37.
It is connected to a boss 37B provided exclusively for this by a fitting portion 36A.

The boss 37B has a blind hole 37E on the inside, into which a boss 26I provided on the inner surface of the bottom 26 of the cylinder fits when the auxiliary piston is at the upper end of its stroke, allowing the gasket to pass through. 37C is disposed within the hole 37E, thereby sealing the space between the boss 26I and the boss 37B. This auxiliary piston has a first chamber C1, hereinafter referred to as the blending chamber, formed inside thereof, which is separated from a second chamber C2, hereinafter referred to as the plug chamber, by a conveying valve, the conveying valve being a gasket. It has a valve head 70 which cooperates with a valve seat 36D provided inside the auxiliary piston by means of an interposition 36E.

Two drive rods 70A and 70B each extend on either side of the valve head 70, rod 70A extending through chamber C1 in the rear part of the auxiliary piston, while rod 70B extends through chamber C2 in the front part.

The end of the aforementioned rod 70A connects to the stem 75 of another valve, which may be a fuel supply or inlet valve.
intended to cooperate with the corresponding end of A;
The inlet valve has a head 75 adapted to cooperate with a seat 75B provided in the bottom 26 of the cylinder.
and is movable in the axial direction inside the boss 26I.

Stem 75A of inlet valve 75 is slidably mounted within bottom 26 and boss 26I by bore 26F, and similarly slidably mounted within boss 37B by bore 37G. The bores 26F and 37G mentioned above each have an inner longitudinally grooved surface which allows fuel and atmospheric air to be drawn into the interior of the auxiliary piston and which provides access to the transfer and inlet valve rods. It is designed to constitute a means for guiding. Furthermore, the inlet valve 75 is acted upon by a spring 76 which presses it against the seat 75B.

The conveying valve head 70 likewise has its seat 36.
It is under the action of a spring 77 that presses it toward D.

The plug chamber C2 is located inside the boss 3 of the auxiliary piston.
6H, and a valve head 80 formed at the end of a bell-shaped member 80A. The bell-shaped member 80A slides on the rod 70B. The valve head 80 is actuated by a spring 80B which presses the valve head 80 onto the seat 36G.

It will be clear that spring 80B is now weaker than spring 77, which is considerably weaker than spring 76.

The front terminal portion of the auxiliary piston 36 contains means for distributing the explosive mixture, which means are constituted by a plurality of holes 36I, each with its axis oriented in a predetermined direction.

The usefulness of this type of structure will become clear from the description of the operation of the device.

As shown in FIG. 11, the main drive piston 29 has a circular container-shaped recess 29A in its central portion, and a plurality of passages 29B communicate with the inside of this recess. The purpose is to communicate the space E provided between the driving piston 29 and the recessed portion. Similarly, the respective axes of these passages are oriented in predetermined directions.

At the center of the recess 29A is a recess 29C which cooperates with the free end of the rod 70B.

The operation of the device described above is as follows.

At the time of starting, the device must be pulled back to the upper end of the stroke position, for example if it is not started and the auxiliary piston 36 is in the lower end of stroke position, and for this purpose the device is moved to the starting handle PA. Apply traction (arrow F in Figure 2).
After this operation, the various parts of the device are in the position shown in FIG. - the main drive piston 29 and thus the impact mechanism 30 are in a high position, the high position of the main drive piston being located within the circular edge 25B provided inside the cylinder 25;
The auxiliary piston 36 is in the upper end position of its stroke and thus forms the above-mentioned space E between the main drive piston 29 and the corresponding surface of the cylinder head 28; In position this piston is cap 37
- the upper part of the boss 26E of the cylinder is pressed by the branch 51B of the fork 50; - the valve 55 is held by the spring 71 which tends to close this valve. 58 and is in the open position; - the inlet valve 75 is opened by the drive rod 70A, so that this valve allows a certain amount of fuel into the brewing chamber C1 via the passages 26F and 37G; and in said chamber the fuel is trapped because the conveying valve 70 is in the closed position under the action of the spring 77; - the push button 20 is not energized;

When the push button 20 is biased in the direction of arrow F2 (FIG. 5), the positions of various members are as follows. - the finger 65 of the operating lever 66 being moved towards the top causes the bush 60 to move along the arrow F3, resulting in: (a) the valve 55 being moved by the spring 58; (b) causing a swinging of the fork 50 along the arrow F4; - as a result of the swinging of the fork 50, the branch 51A forming the control lever presses against the flange 43A of the upper sleeve 43; , thus causing a rocking of this flange (arrow F5) as well as a rocking of the strut 40 along the arrow F6; - when the strut 40 and its shoulder 40A are rocked in this way, the cap 37 and thus the Frees the auxiliary piston 36, which is supported by the spring 39
The main piston 29 suddenly descends in the direction of the main piston 29 and is driven until the cap 37 presses against the cylinder head 28.

Movement of the auxiliary piston 36 from the upper end of stroke position to the lower end of stroke position results in the following (FIG. 6). (a) When the cap 37 is pulled away from the bottom 26 of the cylinder, it closes the inlet valve 75 and thus cuts off the fuel supply; (b) The end of the rod 70B is inserted into the central recess of the main drive piston 29. 29C, thereby separating the head 70 of the conveying valve from the seat 36E of this valve; (c) conveying the fuel from the blending chamber C1 into the above-mentioned space E; (d) the head 80 of the anti-return valve; The spring 80B closing is very weak and therefore generates a negligible force which is easily overcome by the conveyance of fuel, causing the head 80 of the anti-return valve to release; (e) in the space E' formed. (f) When the auxiliary piston 36 is in the lower end position of its stroke, the explosive mixture is E′ (Figure 6). This mixture is said to be completely homogeneous. If mixed, the mixture (air/fuel) is formed on the one hand by the introduction of atmospheric air, and on the other hand in the circular container-like recess 29A of the main drive piston 29.
This is because the piston is formed by flowing through the hole 29B provided in the auxiliary piston 36 and the hole 26I provided at the front end of the auxiliary piston 36, thus generating a large turbulent flow.

At this stage the auxiliary piston 36 is in the lower position and the explosive mixture fills the space E' and forms the combustion chamber. At the same time, the lower end of the impact mechanism 30
It comes into contact with a return mechanism 86A provided at the end of a retractable elastic sheet 86 inserted into the driving head 23. The other end of the thin plate 86 is swingably mounted at 86B and is acted upon by a spring 86C in the intermediate region. This plate 86 is in a retracted position via a rod (not shown) acting on the traction part 86D when the auxiliary piston is in its upper end position.

When the auxiliary piston 36 is in the lower end position of its stroke, the ignition circuit 90 (sixth
The spark shown in Figure) is generated and this spark detonates the explosive mixture. The explosion of an explosive mixture in the combustion chamber has the following consequences (No. 7)
figure).

(a) Press the anti-return valve head 80 against the seat 36G to prevent gases produced by the explosion from entering chambers C2 and C1; (b) quickly re-raise the auxiliary piston 36; . Then, in order for the cap 37 to press again the shoulder 40A of the column 40 after the column 40 swings due to the action of the inclined surface 40B, and for the impact mechanism to momentarily press the return mechanism 86A of the element 86, the stroke locking this auxiliary piston 36 in the upper end position; (c) unlocking the main piston 29 by means of the thin plate 86 in response to the return of the auxiliary piston 36 to the upper position (action of the traction member 86D); The main piston (FIG. 7) being forced downwardly drives the impact mechanism 30 against the spring 32.

When this main drive piston 29 reaches its lower point (FIG. 7), the article to be driven, ie, a nail, hook, etc., is ejected from the driving head 23. The main piston 29 then momentarily rises again to its initial position under the action of the spring 32.

FIG. 7 shows the auxiliary piston 36 being raised again.

When the push button 20 is released, the valve 55 (FIG. 8), which had been in the closed position until then, is opened.
The passage 28B guides the position of the opening through which the gas is discharged outwardly (arrow F8). This evacuation is facilitated by the lifting of the main piston 29.

When the function of one cycle is completed, all parts are in a ready position for a new cycle, ie, the position shown in FIG.

Fully automatic operation is thus obtained for each stroke.

It should be noted that even if the user accidentally holds down the push button for a very long time, this does not prevent the engagement of the auxiliary piston 36 at the upper end of its stroke.

In fact, as shown in FIGS. 9 and 10, the fork 50 is
Even if we consider that is held in the swing position,
At the end of the rise of the cap 37, the sleeves 42 and 43 which were pressing against the shoulder 40A of the column (FIG. 7) are pressed upward by the cap 37.
Cap 37 will be reengaged by pressing on shoulder 40A. Since the branch 51A of the fork 50 cannot be retracted, the upper sleeve 4
The flange 43A of No. 3 will press against the underside of the branch 51A, thus resulting in a slight compression of the spring 44.

When the fork 50 is released (excluding the pressing force of the push button), this fork moves in the direction of arrow F7 (9th
A pivoting movement along FIG. 10 returns it to its initial position, thereby causing the flange 43A of the sleeve 43 to disengage, with the result that the sleeve is then released and, under the action of the spring 44, likewise returns to its initial position.

It should be noted that the cycle will not start unless the fork 50 returns to its initial position, since no action on the pushbutton 20 is applied to the fork 50 and thus remains in the position shown in FIG. .

Furthermore, if the pressure on this push button is released before the end of the actuation cycle, the discharge valve will be biased in the opening direction, but the cycle will nevertheless not be disturbed. The volume of explosive mixture contained in the chamber E' and in the small space between the head 55B of the discharge valve and its seat 28A is immediately transferred to the valve head 55 as soon as ignition takes place.
B is closed and is voluminous to push back the operating finger 65, thereby moving the pushbutton boss 66A to its rest position.

As can be seen in FIG. 11, the main drive piston 29 can be provided with one or more passages 29E for the intake of additional air into the combustion chamber. The cylinder head 28 side of these passages has a circular groove 29
It is closed by a deformable flat packing 90 placed in F and secured by a circlip 91.

The suction of additional air into the combustion chamber is achieved by the main drive piston 29 acting on the axial movement of the auxiliary piston 36 to its upper end of stroke position (FIG. 5).
This takes place in the course of the operating cycle during the transition from 1 to 3 to the lower end position of the stroke (FIG. 6) in which the space E' forms a combustion chamber containing the explosive mixture.

In fact, in the course of the movement of the main piston 29, the flat packing 90 is deformed by the pressing force of the air between the main drive piston and the bottom 27 of the cylinder, thus opening the compartment housing the spring 32. Can be brought to atmospheric pressure.

Of course, the invention is not limited to the embodiments selected and illustrated, but it is obvious that various modifications can be made without departing from the scope of the invention.

[Brief explanation of the drawing]

1 is a partially sectional front view of the device according to the invention, FIG. 2 is a longitudinal sectional view of the actuating mechanism of the main piston and in particular the auxiliary piston in the standby state, and FIG. 3 is an enlarged longitudinal section of a detail of the auxiliary piston. Figure 4 is a plan view corresponding to Figure 2, Figures 5 to 8 are similar views to Figure 2 showing the operating cycle of this device, Figure 9 is a plan view corresponding to Figure 2;
The figures and FIG. 10 show a partial view, and FIG. 11 shows a schematic view of an embodiment of the main drive piston. 10... Grasping handle, 11... Longitudinal member, 1
2... Gas tank, 13... Pressure reducing valve, 14...
...Ignition coil, 15...Storage battery, 16...Ignition device, 20...Push button, 21...Magazine, 2
3... Drive head, 25... Cylinder, 26,
27... Cylinder bottom, 28... Cylinder head, 29... Main drive piston, 30... Impact device, 36... Auxiliary piston, 37... Cap,
40...Strut, 42, 43...Sleeve, 50...
...Motion transmission mechanism (fork), 55...Discharge valve, 60...Button, 65...Operation finger,
70...Transfer valve, 75...Fuel supply valve (inlet valve), 80...Return prevention valve, C1...
...Mixing room, C2...Plug room, E, E'...Space.

Claims (1)

[Claims] 1. A longitudinal member 11 and a cylinder head 2 that partitions the longitudinal member into a first housing and a second housing.
8, a main drive piston 29 and an auxiliary piston 36 disposed in the first housing and the second housing, respectively, and an impact mechanism that engages with the main drive piston and moves within the cylinder 25 in the first housing. 30, a device 16 for igniting the explosive mixture when the auxiliary piston is in the lower end position of its stroke, a device 55 for discharging the gas produced after ignition of the explosive mixture, and a device 14 for actuating the ignition device. , 15, and an auxiliary piston 36 in said second housing is movable between an upper end position and a lower end position of its stroke, said auxiliary piston 36 being movable at the beginning of each working cycle. The main drive piston 29 is supported at an upper end position of its stroke and is arranged to drive the main drive piston 29 to an intermediate position when moving to a lower end position of its stroke; The movement of the piston creates a space E' between the main drive piston and the cylinder head 28 and leads to the introduction of the explosive mixture into this space, the space created depending on the stroke of the auxiliary piston. The auxiliary piston has a predetermined volume and is provided with a valve device 75 for accumulating a predetermined volume of fuel when in the upper end position of its stroke and for depositing said fuel into the space when moving to the lower end position of its stroke. Valve device 70 to be transported
and further comprising devices 26A, 37E, and 37G for introducing air into the space at the same time as transporting the fuel in order to generate the explosive mixture. Impact device for etc. 2. The auxiliary piston 36 is slidably provided within the second housing, and has at least one blending chamber C1 therein for receiving fuel.
and the brewing chamber is in communication with the atmosphere to produce the explosive mixture by scavenging with intake air as the auxiliary piston moves from an upper end position to a lower end position of its stroke. Apparatus according to claim 1. 3. The auxiliary piston 36 has a coaxial line with the cylinder 25, and has two chambers spaced apart from each other in the axial direction and communicating with each other via the conveying valve 70. One of the mixing chambers C1 is disposed on the side far from the main driving piston 29 of the conveying valve 70, and the other of these chambers is the plug chamber C2 on the side close to the main driving piston of the conveying valve. and the conveying valve has a closed position in which the two chambers are isolated from each other when the auxiliary piston is supported in the upper end position of its stroke, and a closed position in which the two chambers are isolated from each other when the auxiliary piston is moved to the lower end position of its stroke. The transfer valve is movable in the axial direction between an open position and an open position that communicates the two chambers, and the transfer valve also controls a fuel supply valve 75 for controlling the supply of fuel to the blending chamber. The device according to claim 1 or 2, wherein a return prevention device 80 is provided in the plug C2. 4. The conveying valve 70 has a valve head cooperating with a valve seat 36D provided inside the auxiliary piston 36, and 2 extending on both sides of the valve head.
4. Apparatus according to claim 3, further comprising two axial drive rods 70A, 70B, each drive rod extending into said brewing chamber C1 and said plug chamber C2, respectively. 5 The drive rod 7 extending to the blending chamber C1
5. The device of claim 4, wherein the free end of 0A is adapted to cooperate with said fuel supply valve 75 housed in the upper bottom of the cylinder. 6. Device according to claim 4 or 5, characterized in that the free end of said drive rod (70B) extending into the plug chamber (C2) is adapted to cooperate with said auxiliary piston (36). 7 The return prevention device 80 provided in the plug chamber
comprises a valve that moves in the axial direction.
Equipment described in Section. 8. The return prevention valve 80 has a bell-shaped valve head 80A and a seat 36G for the bell-shaped valve head provided inside the auxiliary piston 36,
8. The apparatus of claim 7, wherein said bell-shaped valve head slides on said drive rod 70B and is biased into the closed position by a spring 80B. 9. The front end portion of the auxiliary piston 36 is adapted to cooperate with the main drive piston 29;
and the auxiliary piston has a series of holes 36I for communicating the space E' between the cylinder head 28 and the main drive piston with the interior of the auxiliary piston. 9. The apparatus according to any one of clauses 8. 10. The apparatus of claim 9, wherein the holes (36I) have respective axes oriented to create turbulence in fluid passing through the holes. 11 The face of the main drive piston 29 opposite the cylinder head 28 has a central recess 29A with a plurality of passages 29B, which define a combustion chamber between the cylinder head and the main drive piston. The space E' communicates with the central recess 29A, and the plurality of passages have respective axes oriented to generate turbulence in the fluid passing through the passages. 11. Apparatus according to any one of claims 1 to 10, wherein the explosive mixture is uniformly mixed and flows into the space. 12. The main drive piston 29 has an air suction passage 29E into the space E', and the air suction passage can be closed by a deformable packing 90. The device according to any one of items 1 to 11. 13. Said auxiliary piston 36 has an upper end on the fuel supply side with a hole 37E, which hole 37E is arranged so that when the auxiliary piston is in the upper end position of its stroke,
13. A device according to any one of claims 1 to 12, adapted to be fitted in a sealing manner with a boss 26I provided on the inner surface of the upper bottom portion 26 of the cylinder. 14 Said auxiliary piston 36 is adapted to be held at the upper end of its stroke by a retaining device consisting of a cap 37 and a strut 40, said cap 37 engaging the upper end of the auxiliary piston and said cap The strut 40 is under the action of a spring 39 which urges the main drive piston 29 towards the main drive piston 29.
an operating position in which the cap 37 is locked and the spring 39 is compressed so that the auxiliary piston is held in the upper end position of its stroke; Claims 1 to 1 are movable between an inoperative position and an inoperative position where the device is suddenly released.
The apparatus according to any one of clauses 3 to 3. 15 The cylinder head 28 is connected to the support 40,
15. Device according to claim 14, carrying an ignition device 16 and a discharge valve 55 for evacuation of combustion gases. 16. The scope of the present invention is that the operation of moving the support column 40 from the operating position to the non-operating position and the operation of opening and closing the discharge valve 55 are performed by an operating device that can perform these operations together. Apparatus according to clause 15. 17. The operating device has an operating finger 65 cooperating with the push button 20, the terminal part of which is located adjacent to the valve head 55B of the discharge valve and on the valve rod 55A of the discharge valve. and one end of a bushing 60 fitted to the valve rod 55A, and the other end of the bushing 60 is engaged between the end of the valve rod 55A and the corresponding end of the strut 40. 17. The device according to claim 16, in contact with a motion transmission mechanism 50 provided. 18 The discharge valve rod 55A has a spring 58 which urges the rod into the closed position, while the push button 20 is acted upon by at least one spring 71 opposing the discharge valve spring 58, 18. The device of claim 17, wherein the spring 58 is made weaker than the push button spring 71. 19. Claim 16: The discharge valve spring 58 cooperates with the motion transmission mechanism 50 to return the motion transmission mechanism to the inoperative position and simultaneously return the discharge valve 55 to the closed position. or the device according to item 17. 20 The motion transmission mechanism comprises a fork 5 having two branches 51A, 51B extending respectively on either side of a pin 51 carried on the upper bottom part 26 of the cylinder.
0, the first branch 51B is constrained between a bush 60 of the discharge valve rod and a spring 58, and the second branch 51A is shaped to cooperate with the strut 40. A device according to any one of claims 16 to 19. 21 The strut 40 is formed by a rod of elastic material, one end of which is fixed to the cylinder head 28, the other end of which carries a device capable of cooperating with the second branch 51A of the motion transmission mechanism. 21. The apparatus of claim 20, comprising: 22 The device capable of cooperating with the second branch 51A of the movement transmission mechanism consists of two sleeves 42, 43 each provided with a flange 42A, 43A, which sleeves are engaged oppositely to each other and their 21. A spring 44 supported by the flanges 42A, 43A is disposed therebetween, such that the upper sleeve 43 cooperating with the second branch 51A is subjected to the elastic action of the strut 40. equipment. 23 The upper bottom part 26 of the cylinder supports the motion transmission mechanism 50 and has a passage 2 through which the discharge valve rod 55A passes and a passage 2 which allows movement of the sleeves 42, 43 that engage with the struts 40.
23. Device according to claim 22, characterized in that the passages constitute openings for the inflow of air for forming the explosive mixture. 24 The fuel supply valve 75 is disposed in a chamber in the upper bottom part 26 of the cylinder, and the chamber communicates with a fuel supply device located on the same axis, and the fuel supply valve 75 is opened and closed by the auxiliary fuel supply device. 24. A device as claimed in any one of claims 3 to 23, controlled by the movement of the piston 36 from an upper end of stroke position to a lower end position. 25 Said elongate member 11 is adapted to cooperate with a gripping handle 10, in which are arranged a fuel gas tank 12, a pressure reducing valve 13, a series of accumulators 15 and a coil 14 connected to said accumulators. 25. An apparatus according to claim 1, further comprising a magazine (21) for parts to be loaded, which magazine communicates with a head (23) for driving the articles. 26 The driving head 23 accommodates a retractable elastic plate 86, which provides a temporary resistance to the percussion mechanism 30 when the auxiliary piston 36 is not in the upper end position of its stroke. 26. The apparatus according to claim 25.