JPH0586558B2 - - Google Patents

Description

[Detailed description of the invention] Industrial applications The present invention relates to a mechanism for preventing gun explosions.

BACKGROUND OF THE INVENTION It is common for guns to be equipped with a safety device to prevent accidental firing when handling them. A typical safety device is one in which the firing device does not operate even if the trigger is pulled, or is configured so that the trigger cannot be pulled.

However, if the gun is dropped, for example, if the firing pin is not locked or has a structure that allows it to easily become unlatched, the firing pin may move due to the impact even if the safety device is engaged. This may lead to an explosion. A model as an example of a gun with such a structure
Taking the 1886 rifle as an example, the structure of its engine is as shown in Figure 3. When the trigger 1 is pulled, the firing pin 2 is pushed by the main spring 3 and strikes the rear end surface 4b of the firing pin 4. The firing pin 4 is configured to advance while compressing the firing pin return spring 6, protrude from the front surface of the bolt 7, and strike a detonator (not shown) to fire a bullet. The firing pin 4 is located at the rear 4 as shown in Figure 4.
Since the firing pin a is formed in the shape of a column and is constantly biased backward by the firing pin return spring 6, only when the momentum when the firing pin 2 hits the rear end surface 4a of the firing pin 4 is large; The firing pin 4 moves forward by its own inertia.

However, even if the firing pin 2 is locked by the safety device, when a large impact is applied in the axial direction of the gun, the firing pin 4 cannot be prevented from moving forward due to inertia, resulting in an accidental firing. The result was a connection.

Problems to be Solved It is an object of the present invention to provide a safety mechanism that can prevent the occurrence of accidental firing in a gun having a firing mechanism as described above in response to impacts other than normal firing operations.

Means for Solving the Problems An object of the present invention is to provide a gun having a firing mechanism as described above, in which the firing pin is normally locked to the bolt, and only at the moment when the rear end of the firing pin is struck by the hammer. This is accomplished by providing a mechanism at the rear of the firing pin that allows the lock to be released. That is,
The safety mechanism against external impact of the present invention is such that the rear part of the firing pin is formed into a cylindrical body, and a locking member having a locking pawl that can protrude and retract outwardly from the cylindrical wall is swingably attached to a part of the cylindrical wall. An inertial column that is pivotally supported by the cylindrical body and can slide back and forth only within a limited range is inserted into the cylinder, and the column is pressed rearward between the front end of the column and the lock member, and the engagement is A spring is provided that biases the locking member in the direction in which the locking pawl is retracted, and when the rear end surface of the column is at the rear end surface position of the firing pin or a more protruding position, the locking pawl is prevented from retracting; At a position where the rear end surface is recessed from the rear end surface of the firing pin, a locking member support is provided at the front end of the column that allows the locking pawl to retract, while the firing pin is retracted into the bolt that accommodates the firing pin. It is provided with an engaging recess that engages with the locking pawl when in position.

The safety mechanism of the present invention is constructed as illustrated in FIG.

1 is the trigger, 2 is the hammer, 3 is the main spring, 5 is the firing pin,
6 is a firing pin return spring, and 8 is a bolt.

As shown in FIG. 2, the firing pin 5 according to the present invention is formed so that its rear part becomes a cylindrical body 5a. A dividing groove 5c is formed on the side wall of this cylinder 5a.
A lock member 53 is pivotally supported by a pin 54 attached to the cylindrical body 5a. The locking member 53 is formed in an L shape,
A locking claw 53a is formed on the outside of the outer arm, and a support base 53b is formed on the inside thereof.

On the other hand, an inertial column 51 is fitted into the cylinder 5a so as to be slidable back and forth. A slide groove 51a is formed in the side wall of the inertia column 51, and a pin 52 attached to the cylinder 5a limits the front and back sliding range of the inertia column 51 by the length of the slide groove 51a. It's getting old. Furthermore, a support pillow 51b having a surface in contact with the support bed 53b is formed at the front portion of the inertial column 51.

Inner arm 53c of lock member 53 and inertia column 51
A spring 55 is provided between the front end surface 51c of the lock member 51 and the inertial column 51, and presses the inertial column 51 rearward and the inner arm 53c of the lock member 53 forward. Therefore, the lock member 53 is biased clockwise about the pin 54, and the rear end surface 51d of the inertia column 51 is retracted so as to protrude from the rear end surface 5b of the firing pin, and the slide groove of the inertia column 51 is moved back. 5
The end face of 1a hits the pin 52 and is stopped.
In the retreated position of the inertial column 51, the support pillow 51b pushes up the support bed 53b, so the lock member 53
The locking pawl 53a prevents the clockwise rotation of the cylinder 5.
It is held in a state where it protrudes outward from the outer wall surface of a. Then, in the support pillow 51b, the rear end surface 51d of the inertial column 51 moves forward beyond the rear end surface 5b of the firing pin 5,
It is configured such that it comes out from under the support bed 53b only when it reaches a position recessed into the cylindrical body 5a. Further, although the support surface of the support bed 53b is planar, its side surfaces are formed obliquely, so that when the support pillow 51b comes off from the support bed 53b with the inertia column 51 being pushed in, the locking claw 53a When the supporting pillow 51b slips smoothly into the cylinder 5a and the inertial column 51 is pushed out by the spring 55, the locking pawl 53a smoothly projects out of the cylinder 5a. It is configured so that it can be done.

On the other hand, the bolt 8 in which the firing pin 5 having the mechanism configured as described above is accommodated has an engaging recess 8a that can engage with the locking pawl 53a protruding from the outer surface of the side wall of the cylinder 5a, as described above. is provided on the inside. The position of the engagement recess 8a is such that the firing pin 5 is locked when it is pushed back rearward by the firing pin return spring 6 and the rear end surface 5b of the firing pin 5 protrudes from the rear end surface 8b of the bolt. is set to .

A firing pin return spring 6 and a firing pin 5 are attached to such a bolt 8.
When assembled by inserting the rear end surface 8b of the bolt 8,
The rear end surface 5b of the firing pin 5 is locked in a protruding state from the rear end surface 5b of the firing pin 5, and the rear end surface 51d of the inertia column 51 is further maintained in a protruding state from the rear end surface 5b of the firing pin 5 by a spring 55. .

A gun equipped with such a safety mechanism can withstand a strong impact, such as when dropped, by locking the locking claw 5.
Since the firing pin 3a is engaged with the engagement recess 8a, the firing pin 5 cannot be moved and the electric tube will not be struck.

On the other hand, by pulling trigger 1, hammer 2
When the firing pin 5 is struck by a normal firing operation, the firing pin 2 first strikes the rear end surface 51d of the inertia column 51 that protrudes from the rear end surface 5b of the firing pin 5, so the inertia column 51 is pushed forward. As a result, the rear end surface 51d of the inertial column 51 becomes inwardly inward than the rear end surface 5b of the firing pin 5, compressing the spring 55 and detaching the support pillow 51b from the support bed 53b. Accordingly, the locking member 53 rotates, and the locking pawl 53a disengages from the engagement recess 8a and sinks into the wall of the cylinder 5a. The hammer 2 has an inertial column 51 like this
After being pushed away at high speed, the rear end surface 5b of the firing pin 5 is struck, but at this time, the locking pawl 53a is just recessed, so the firing pin 5 moves forward and strikes the detonator. That is, when the firing pin 5 is struck with the hammer 2 in accordance with a normal firing operation, the safety device is automatically disengaged and the gun can be fired without any problems.

In addition, when the hammer 2 is slowly returned to the firing position, the hammer 2 pushes the inertia column 51, and the rear end surface 51d of the inertia column 51 reaches the position of the rear end surface 5b of the firing pin 5. Advance. However, in this position, the support pillow 51b has not yet come out from under the support bed 53b, so even if an impact force is applied to the firing pin 5, or even if the rear end face 5b is pushed, the safety mechanism remains activated, and the firing pin remains activated. 5 does not move. Of course, even if a strong impact force is applied to the gun with the hammer 2 in contact with the rear end surface 5b of the firing pin 5, the firing pin 5 will not be disengaged.

Effects of the Invention The safety mechanism of the gun according to the present invention against external impact is automatically released only when the rear end of the firing pin is struck by the hammer in accordance with a normal firing operation; It has the advantage of not being released by an impact, and has an excellent explosion prevention function.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a gun equipped with a safety mechanism against external impact according to the present invention, FIG. 2 a is a partial sectional view of its firing pin, b is a rear view, and c is a plan view.
FIG. 3 is a sectional view of a conventional gun, FIG. 4a is a side view of its firing pin, and FIG. 4b is a rear view.

Claims (1)

[Claims] 1. A safety mechanism for preventing accidental firing in guns equipped with a firing mechanism that strikes the rear end of the firing pin, which is a locking pawl that forms the rear part of the firing pin into a cylindrical body and that can protrude and retract outward from the wall of the cylindrical body. A lock member having a locking member is swingably supported on a part of the wall of the cylinder, and an inertial column that can slide back and forth only within a limited range is inserted into the cylinder, and the front end of the column and the lock are connected to each other. A spring is provided between the column and the locking member to push the column rearward and urge the locking member in a direction in which the locking pawl is retracted, so that the rear end surface of the column is at the rear end surface position of the firing pin or more protruding. A locking member supporting pillow is provided at the front end of the column to prevent the locking pawl from retracting in the position where the rear end surface of the column is retracted from the rear end surface of the firing pin. There is a
A safety mechanism against external impact of a gun, wherein a bolt housing the firing pin is provided with an engaging recess that engages with the locking pawl when the firing pin is in the retracted position.