JPH0691557A - Dog spike driver and dog spike driving work body used therefor - Google Patents

Abstract

PURPOSE:To provide a dog spike driving device for easily and effectively executing driving work of a dog spike into a sleeper, while reducing labor of a worker. CONSTITUTION:Impact force is axially continuously given by the output of an engine 5, to a dog spike driving work body 3 supported on the lower part of a main body in such a way that the work body 3 can be moved in the axial direction. The dog spike driving work body 3 has an upper shank part 3a supported on the lower part of an impact device, and a lower work part 3b, on which a dog spike head covering part 35 is formed, which is fitted to the head part of the dog spike.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dog nail driving device and a dog nail driving work body used for the device.

[0002]

2. Description of the Related Art Except in the case of some high-speed railways such as the Shinkansen, the general form of railroad track is still one in which rails are fixed to sleepers buried in a ballast. . The fixing of the rail to the sleeper is done using dog nails.

The dog nail a is, as illustrated in FIGS. 7 and 8 of the present application, a shaft portion b having a rectangular cross section with a sharp lower end,
It has a form in which an eccentrically formed elliptical head c is formed so that the base Rb of the rail R can be pressed down. The rail R is fixed to the sleeper W using the dog nail a by directly mounting the rail R on the sleeper W and holding the head c of the dog nail a driven into the sleeper W as shown in FIG. When the base portion Rb of the rail R is pressed, and as shown in FIGS. 10 and 11, the rail R is previously fixed to the tie plate T by the leaf spring S and the fastening bolts and nuts B, and The tie plate T may be fixed to the sleeper W with the dog nail a. The latter form of fixing the rail to the sleeper via the tie plate is adopted when a large lateral load is applied to the track such as a curved portion.

By the way, rail sleepers and rails are
Both have a limited life and need to be replaced after a certain period of use. Then, in that case, in order to fix the rail to the sleeper directly or via a tie plate, it is necessary to drive doggies into the sleeper. For a normal orbit,
Considering that 39 sleepers are required for every 25m,
Since it is necessary to drive four dog nails into one sleeper, it is necessary to drive 3120 dog nails in order to replace the sleepers or rails with a track of 500 m, for example. Moreover, such a work must be carried out quickly at night when the number of trains passes is small, and on a route where freight trains etc. pass, during a short time when there are no trains passing, a large number of dog nail driving works must be carried out quickly. I won't.

Conventionally, such an operation of driving a dog nail is
It has all been done manually with a large hammer. Further, since such work must be performed quickly within a short time as described above, it causes a great deal of labor for the worker and is dangerous.

The present invention has been devised under the circumstances as described above, and remarkably reduces the labor of the worker for the dog nail driving work which is essential for the rail track rail replacement or sleeper replacement work. However, it is an object of the present invention to provide a dog nail driving device configured to be simple, safe, and quick.

[0007]

In order to solve the above problems, the present invention takes the following technical means. That is, the dog nail driving device according to claim 1 of the present application,
A tubular body having a striking mechanism built-in, an axially movable lower end of the tubular body, and a dog nail driving work body for striking the head of the dog nail by receiving the striking force transmitted by the striking mechanism; An engine that is integrally attached to the upper part of the tubular body and that drives the striking mechanism is provided.
The dog nail driving work has an upper shank portion supported on a lower portion of the tubular body, and a lower working portion,
The lower working part is characterized in that a dog-nail head crown portion is formed.

The dog nail driving device according to claim 2 of the present application is the device according to claim 1, wherein the dog nail head crown portion of the dog nail driving work is brought into contact with the top surface of the dog nail head. And a protrusion extending downward so as to engage with each end of the dog nail head in the long-axis direction in plan view.

Further, in the dog nail driving device of claim 3 of the present application, in the device of claim 1 or 2, the width of the lower working portion of the dog nail driving work body is substantially equal to the minor axis direction of the dog nail head. It is characterized by being set to.

In the dog nail driving work body, the upper shank portion and the lower work portion may be integrated (Claim 4) or may be separate bodies (Claim 5).
In the latter case, the upper shank portion and the lower working portion are preferably connectable by taper fitting.

Further, the invention according to claim 6 of the present application is a dog nail driving work body which is used by being attached to an impact device capable of imparting an impact force in the axial direction, and which is an upper part attached to the impact device. A shank portion and a lower working portion are provided, and the lower working portion includes a contact portion for contacting the top surface of the dog nail head and a lower portion so as to engage with each end of the dog nail head in the long-axis direction in plan view. It is characterized in that a crown of a dog nail head having a projection extending to the inside is formed.

Further, the invention according to claim 7 of the present application is a dog nail driving work which is used by being connected to the taper shank of an impact device capable of imparting an axial impact force to the taper shank held in the lower portion. The body is provided with an upper shank portion in which a tapered hole that can be fitted into the tapered shank is formed, and a lower working portion, and the lower working portion has an abutting portion with respect to the top surface of the dog nail head. , A dog-nail head cap portion having projections that extend downward so as to engage with the ends of the dog-nail head in the long-axis direction in plan view.

Further, in the dog nail driving work body of claim 8, in the work body of claim 6 or 7, the width of the lower work portion is set to be substantially equal to the width of the dog nail head in the short axis direction. Characterized.

[0014]

The dog nail driving device according to the present invention applies a continuous impact force in the axial direction to the dog nail driving work body supported at the lower portion thereof by the engine-integrated impact device. It is configured so that the dog nail is driven by the impact force.

In the above-mentioned dog nail driving work body, since the dog nail head crown portion is formed in the lower working portion thereof, the dog nail head crown portion is temporarily erected against the sleeper in advance. The dog nail can be easily driven by the impact force applied to the hammering work body by simply driving the above impact device while fitting it into the. That is, since the dog nail head crown portion is fitted to the dog nail head, the driving work body is not displaced laterally with respect to the dog nail head, and is given to the work nail in the axial direction. The applied impact is effectively transmitted axially to the dog nail, which effectively drives it into the sleeper.

Specifically, as described in claim 2, the crowned portion of the dog nail head has a contact portion with respect to the top surface of the dog nail head and each of the dog nail head in the long axis direction in plan view. A protrusion extending downward so as to engage with the end portion may be provided, and the protrusion is engaged with the head portion to cause a lateral displacement of the working body with respect to the dog nail head. The movement is effectively prevented, and the axial impact force applied to the working body as described above can be effectively transmitted to the dog nail.

Since the above-mentioned projections are formed so as to be engaged with the respective ends of the dog nail head in the long axis direction in plan view, and the projections which are engaged with the ends of the head in the short axis direction in plan view are not formed. As described in claim 3, the width of the lower working part of the dog nail driving work body can be set to be substantially equal to the axial direction of the dog nail head.

Then, as a form of fixing the rail to the sleeper, there is a form of fixing the rail to the sleeper via a tie plate as described in the section of the prior art. In that case, the rail is fixed to the tie plate. It is necessary to drive the dog nail into the sleeper through the through hole provided in the immediate vicinity of the leaf spring and the fastening bolt / nut for doing, but in this case also, the driving work body does not interfere with the leaf spring, The driving operation can be performed conveniently. That is, by setting the width of the lower working portion of the driving work body to be substantially equal to the width in the short axis direction of the dog nail head, the lower end working portion is crowned on the dog nail head and the dog nail is driven downward. While the interference between the lower working part of the power striking work body and the plate spring for fixing the rail to the tie plate is effectively avoided, the dog nail driving work by the driving device of the present invention can be conveniently performed. is there.

In the dog nail driving work body, the upper shank portion and the lower work portion may be integrated (Claim 4) or may be separate bodies (Claim 5). When the upper shank part and the lower work part of the dog nail driving work body are separated from each other, it is desirable that these can be connected by taper fitting.In this case, the taper shank is previously attached to the lower part of the impact device. Every time, the lower working portion of the dog nail driving work body can be taper-fitted to form the dog nail driving device of the present invention, while other work bodies that can be fitted to the taper shank are prepared and necessary. It is effective in increasing the versatility of the impact device, such that various working bodies can be replaced and used depending on the situation.

Claims 6 to 8 define a dog nail driving work body which is attached to a lower portion of the impact device.

A dog nail driving work body defined in claim 6 is the same as the dog nail driving work body in the dog nail driving device described above, and is provided with an upper shank portion and a lower working portion, and the lower working portion. Has a dog nail head crown portion formed.

By using the dog nail driving device of the present invention, the force for driving the dog nail can be obtained from the output of the engine which the device integrally has, and therefore, it is necessary for the worker in the driving operation to sleep the sleepers. While inserting the lower crowned part of the dog nail driving work supported by the lower part of the device into the head of the dog nail that was temporarily erected in advance, increase the engine speed by operating the throttle lever etc. All that is required is to hold the device while slightly pressing it down. The impact generated by the impact device is intense, and since the device itself has a certain weight, simply holding the device slightly downward as described above and holding it moderately, dog nails will not fall into the sleeper. Will be driven.

Not only the time required for driving one dog nail is significantly shortened, but also the labor of the operator is significantly reduced as compared with the conventional driving method of hammering down the hammer many times.

As a result, the work efficiency of the rail track rail or sleeper replacement work is remarkably improved, the fatigue of the worker is significantly reduced, and the safety is enhanced.

Further, since the engine-integrated impact device is used, the compressor and the pressure hose are not required unlike the air impact device, which is convenient for carrying and can be carried anywhere. It is possible, and the workability is significantly improved.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will be described below.
A specific description will be given with reference to the drawings.

The dog nail driving device 1 of the present invention is a hammering work body to be attached to the engine-integrated impact device 2 and has a special shape suitable for properly driving the dog nail a into the sleeper W. It is characterized by adopting 3. In the following, first, a configuration example of the engine-integrated impact device 2 will be described, and then an example of the dog nail driving work body 3 will be described.

As shown in FIG. 1, the engine-integrated impact device 2 used in the present invention has a striking mechanism 6 driven by an engine 5 inside a cylindrical body 4.
Is decorated. Inside the cylindrical main body 4 having the engine housing 7 mounted on the upper portion and extending downward, a cylinder cylinder 9 is provided via an annular space 8. Inside the cylinder tube 9, a movable cylinder 11 having an upper portion linked to the crank mechanism 10 is further installed so as to be vertically reciprocally movable.

On both sides of the engine housing 7, a handle 12 to be gripped by an operator is provided in a protruding manner, and on one of them, a throttle lever 13 for controlling the rotational speed of the engine 5 is provided. An operator who holds the handle 12 operates the throttle lever 13 to increase or decrease the rotation speed of the engine 5. The rotation of the engine 5 is transmitted to the crank plate 14 by a centrifugal clutch mechanism (not shown).
That is, although the crank plate 14 does not rotate in the idling state, the centrifugal clutch mechanism connects the output shaft and the crank plate 14 at the time when the number of revolutions of the engine 5 becomes a certain value or more, and the crank plate 14 rotates. Let An eccentric pin 15 is projectingly provided on the crank plate 14, and the eccentric pin 15 and the upper part of the movable cylinder are connected by a crank rod 16. Therefore, when the rotation speed of the engine 5 is increased, the movable cylinder 11 is vertically reciprocally driven inside the cylinder tube 9 via the crank mechanism 10 including the crank plate 14 and the crank rod 16.

A through hole 17 is formed in the lower end of the movable cylinder 11 in the axial direction, and a lower end of a free piston 18 inserted into the movable cylinder 11 so as to be freely movable up and down is struck through the through hole 17. The rod 18a is inserted therethrough.

The internal space of the movable cylinder 11 is divided into an upper pneumatic chamber 19 and a lower pneumatic chamber 20 by the free piston 18. When the movable cylinder 11 is driven up and down, the free piston 18 inside the movable cylinder 11 moves
It moves up and down, following the movement of 1. When the movable cylinder 11 moves upward from the bottom dead center toward the top dead center, the inertial delay of the free piston 18 causes the lower pneumatic chamber 20 to be compressed once, and the expansion force of the compressed lower pneumatic chamber 20 is increased. Assist in the upward movement of the free piston 18 after inertia delay. Then, when the movable cylinder 11 starts moving downward after passing through the top dead center, the upper pneumatic chamber 19 of the movable cylinder 11 is temporarily moved by the upward movement of the free piston 18 due to the inertial delay and the inertial force thereof. Due to the downward movement of the movable cylinder 11 which is greatly compressed and the expansion force of the upper pneumatic chamber 19 which is once compressed as described above, the free piston 18 moves downward while its speed is remarkably increased, and the lower end of the free piston 18 is hit. The rod 18a strikes the top of the work body 3 supported by the lower portion of the tubular body 4.

In order to smooth the vertical movement of the movable cylinder 11, the upper and lower parts of the cylinder cylinder 9 are
Through holes 21 and 22 are opened. As a result, the crank chamber above the movable cylinder 11 inside the cylinder tube 9 is communicated with the lower space in which the work body 3 is supported, and each space becomes negative pressure to move the movable cylinder 11 up and down. The movable cylinder 1
The vertical movement of 1 is smoothed.

Further, the side wall of the movable cylinder 11 is also provided with a through hole 23 for smoothing the vertical movement of the free piston 18. As a result, when the free piston 18 moves upward to compress the upper air pressure chamber 19, the lower air pressure chamber 2
0 communicates with the outside of the movable cylinder 11, and the lower pneumatic chamber does not become negative pressure to prevent the free piston 18 from moving upward. Conversely, when the free piston 18 moves downward, The air pressure chamber 19 communicates with the outside of the movable cylinder 11, so that the upper air pressure chamber 19 becomes negative pressure and the free piston 1
The downward movement of 8 is not obstructed.

As a general effect of the above, when the movable cylinder 11 is driven up and down, the free piston 18 inside it is moved.
The speed when moving downward due to the action of the expansion force of the upper pneumatic chamber 19 after compression is extremely high,
As a result, the impact force repeatedly applied to the work body 3 can be significantly increased.

A boss portion 24 having a reduced diameter is provided on the lower portion of the cylindrical main body 4, and the boss portion 24 is provided.
The upper shank portion 3a of the working body 3 is supported by the axially movable portion. Then, the upper shank portion 3a of the working body 3 is received and held so as to be movable by a certain distance in the axial direction while giving a cushioning function to the tubular body 4 as follows.

That is, at the lower end of the cylindrical body 4,
A holder 26 having a lower through hole 25 is connected by screw means. On the other hand, inside the holder 26, the work body support member 2 is fitted to the boss portion 24 so as to be fitted therein.
7 is provided so as to be slidable in the axial direction, and the lower portion of the working body support member 27 is exposed to the outside through the lower through hole 25 of the holder 26. An outward flange 28 is formed at the upper end of the work body support member 27, and a suspension spring 29 is interposed between the flange 28 and the cylindrical body 4. Further, an annular space 30 surrounded by the inner wall of the holder whose upper and lower ends are defined by the outward flange 28 and the bottom wall 26a of the holder 26 and the outer wall of the work support member has a tubular shape made of rubber or the like. The elastic body 31 is interposed.

A large diameter portion 27a is formed in a portion of the work supporting member 27 exposed below the holder 26, and a lever 32 is formed in the large diameter portion 27a.
A retaining pin 33 that can be rotated is laterally passed through and supported by. On the other hand, in the upper shank portion 3a of the working body 3, a recess 34 having a constant axial length is provided so that the vertical movement stroke is defined by the retaining pin 33.
Are formed.

The retaining pin 33 is provided with an arcuate deletion portion 3
3a is formed so that a state in which the work body 3 can be prevented from coming off and a state in which the work body 3 can be taken out can be selected depending on the rotational position of the coming-off prevention pin 33.

Therefore, according to the present embodiment, the working body 3 can be attached to the lower portion of the cylindrical body 4 without disassembling the lower portion of the cylindrical body 4, especially the holder 26 thereof.

In the dog nail driving device 1 of the present invention, the working part has a special shape as a working body supported below the engine-integrated impact device 2 having an example of the structure described above. The dog nail driving body 3 is adopted.

As shown in detail in FIGS. 1 and 2, the dog nail driving work body 3 has an upper shank portion which is axially movably supported in the lower portion of the tubular body 4 of the impact device 2 as described above. It has 3a and the lower working part 3b, and the dog nail head crown part 35 is formed in this lower working part 3b.

In this embodiment, the dog nail driving work body 3 has an upper shank portion 3a supported by the impact device 2 and a lower work portion 3b formed separately.
That is, a taper shaft portion 36 is formed in the lower portion of the upper shank portion 3a, while the lower working portion 3b is fitted with a taper hole 37 formed in the upper portion thereof. There is.

Dog nail head crown portion 3 in the lower working portion 3b
Reference numeral 5 denotes a dog nail head b which has a shape capable of being fixed to the head c of the dog nail a in a lateral direction and non-rotatably, so that the dog nail head b is shown in detail in FIGS. Of the abutment portion 38 against the top surface of the dog and projections 39, 39 extending downward so as to engage with the ends of the dog nail head b in the long-axis direction in plan view
Composed of and.

Further, as shown in FIG. 5, the head b of the dog nail a is displaced laterally as a whole with respect to the rectangular shaft portion b of its cross section, and the base Rb of the rail R or the tie plate. Although it is formed so as to press T against the sleeper W conveniently, the dog nail head crown portion 35 of the driving work body 3 corresponds to the deviation of the dog nail head b. Also, as a whole, is laterally offset with respect to the shank portion 3a, and when the head a is attached to the dog nail head crown portion 35, the shaft portion of the dog nail a is driven into the dog nail driving work a. Is formed so as to substantially coincide with the axis.

Further, in this embodiment, as shown in FIGS. 4 and 6, both sides of the dog nail head crown portion 35 are flatly removed, and the widthwise dimension thereof is changed to the dog nail head portion. The dimension is substantially the same as the dimension in the end axis direction of b. As a result, the dog nail a
Even if there is another object on the side of the head b, the dog nail a can be conveniently driven downward without interfering with it.

In the above-mentioned structure, the dog nail driving device 1 of the present invention is held vertically by grasping the upper handle 12 of the dog nail driving device 1, and then the head of the dog nail a temporarily held in advance vertically on the sleeper W. The dog nail covered portion 35 of the dog nail driving work body 3 is crowned to the portion b as shown in FIGS. 5 and 6, and the throttle lever 13 is operated to increase the rotation speed of the engine 5. Then, the centrifugal clutch transmits the output of the engine 5 to the crank mechanism and drives the striking mechanism 6 in the device. As a result, the top of the dog nail hammering work body 3 receives a continuous impact force by the hammering mechanism 6, and this impact force is downwardly directed to the head b of the dog nail a via the dog nail head crown portion 35. Be transmitted to.

The impact device 2 itself has a certain weight, and in addition to that, the extremely strong impact force as already described is continuously applied to the dog nail driving work body 3, so that the operator is While holding the dog nail driving device 1 of the invention in the vertical state as described above, the dog nail a is smoothly pushed into the sleeper W within a short time by merely pressing the handle downward while operating the throttle lever. Be driven in.

Then, as described above, the width of the dog nail head crown portion 35 formed in the lower portion of the dog nail driving work body 3 is
When the rail R is fixed to the sleeper W via the tie plate T by setting the width to be substantially equal to the width of the head b of the dog nail a, the dog nail driving work body 3 is moved relative to the tie plate W by the rail. The dog nail driving operation can be conveniently performed without interfering with the leaf spring S for fixing the.

As described above, according to the dog nail driving device of the present invention, the dog nail can be easily and efficiently attached to the sleeper without requiring an excessive labor for the operator to hit down a large hammer many times. Driving work can be performed.

As explained in the section of the prior art,
In such dog nail driving work, the sleepers or the rails may have to be replaced at a relatively short time such as at night or during train passage time intervals. Even in such a case, the dog nail driving device of the present invention is also required. By using, you will be able to perform work smoothly.

In particular, since the dog nail driving device of the present invention is an engine-integrated type, it does not require a compressor or a pressure hose and is convenient to carry, and it should be said that its practicality is extremely excellent. .

Of course, the scope of the present invention is not limited to the above embodiments. Although the one shown in the embodiment is the most suitable as the impact device, it is an engine-integrated type and is configured so that an axial impact force can be continuously applied to the work body by the output of this engine. It may be in any form as long as it is

Further, as the dog nail driving work body, in the above embodiment, the upper shank portion and the lower work portion are separately formed so that they can be connected by taper fitting. It goes without saying that the portion and the upper shank portion may be integrally formed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the overall configuration of an example of a dog nail driving device of the present invention.

FIG. 2 is a partial cross-sectional side view showing an example of a dog nail driving work body.

FIG. 3 is a front view of the working body shown in FIG.

FIG. 4 is a bottom view of the working body shown in FIG.

FIG. 5 is a sectional view of an essential part showing a usage state of the above-described embodiment of the present invention.

6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is a side view of an example of dog nails.

FIG. 8 is a plan view of an example of dog nails.

FIG. 9 is a cross-sectional view showing an example of driving a dog nail.

FIG. 10 is a plan view showing an example of driving a dog nail.

11 is a sectional view taken along line XI-XI of FIG.

[Explanation of symbols]

 1 dog nail driving device 2 impact device 3 dog nail driving work body 3a upper shank portion 3b lower working portion 5 engine 35 dog nail head crown portion 38 contact portion 39 protrusion

Claims (8)

[Claims] 1. A tubular main body having a striking mechanism built-in, and a dog nail driving for striking the head of the dog nail, which is supported by the lower end of the tubular body so as to be axially movable and receives the striking force transmitted by the striking mechanism. The working body and an engine that is integrally attached to the upper portion of the tubular body and drives the striking mechanism are provided, and the dog nail driving body is an upper shank portion supported on the lower portion of the tubular body. And a lower working part,
A dog nail driving device characterized in that a dog nail head crown portion is formed in the lower working portion. 2. The dog nail head capped portion of the dog nail driving work engages with the abutting portion against the top surface of the dog nail head and each end of the dog nail head in the longitudinal direction in plan view. The dog nail driving device according to claim 1, wherein the dog nail driving device is configured with a protrusion extending downward. 3. The dog nail driving device according to claim 1, wherein the width of the lower working portion of the dog nail driving work body is set to be substantially equal to the width of the dog nail head in the short axis direction. 4. The dog nail driving work body has an upper shank portion and a lower work portion which are integrated with each other.
The dog nail driving device according to any one of 1 to 3. 5. The dog nail driving work body according to claim 1, wherein an upper shank portion and a lower work portion of the dog nail driving work body are separated from each other, and can be connected by taper fitting thereof. Any dog nail driving device. 6. A dog nail driving work body to be used by being mounted on an impact device capable of imparting an axial impact force, comprising an upper shank portion mounted on the impact device and a lower work portion. And the lower working portion has an abutting portion for contacting the top surface of the dog nail head, and a dog nail head having a projection extending downward so as to engage with each end of the dog nail head in the long-axis direction in plan view. A dog nail driving work characterized in that a crown portion is formed. 7. A dog nail driving work body, which is used by being connected to the taper shank of an impact device capable of imparting an axial impact force to the taper shank held at a lower portion, and which is fitted to the taper shank. Is provided with an upper shank portion having a tapered hole formed therein and a lower working portion, and the lower working portion has an abutting portion with respect to the top surface of the dog nail head, and each of the dog nail head in the long-axis direction in plan view. A dog nail driving work body, wherein a dog nail head crown portion having a protrusion extending downward so as to engage with an end portion is formed. 8. The dog nail driving work body according to claim 6, wherein the width of the lower working portion is set to be substantially equal to the width of the dog nail head in the short axis direction.