JPS6315361Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tamping tool in a track straightening machine.

Generally, a track straightening machine is provided with a tamping device for compacting the ballast on the track. This tamping device fills the lower part of the sleeper with ballast by thrusting a tamping tool provided at the lower end into the ballast while vibrating it. There are two methods for filling the lower part of the railroad ties with ballast: a vibration filling method and a compression filling method. The vibration filling method uses opposing tamping tools that vibrate at a high frequency of 3,000 to 3,600 vpm (vibrations per minute) and thrust into the ballast with sleepers in between, causing the ballast to vibrate at a high frequency via the tamping tools. In both methods, ballast is filled into the lower part of the sleeper by moving opposing tamping tools closer to the sides of the sleeper. On the other hand, in the compression filling method, in order to reduce the resistance when pushing the tamping tool into the ballast, the opposing tamping tools are vibrated at a low frequency of 1500 to 2000 vpm and inserted into the ballast with sleepers in between. The tamping tools move the opposing tamping tools closer to the sides of the sleepers to apply surface pressure to the ballast, and the tamping tools compress the ballast to the bottom of the sleepers, filling the ballast into the bottom of the sleepers. It is. The present invention relates to a tamping tool for a track straightening machine that uses the vibration filling method among these filling methods. The ballast pressing part a has a planar shape, and therefore, when the ballast b is compacted using this part, there is a drawback that the ballast vibrating at a high frequency tends to escape upward or in the left and right direction. In particular, when ballast b is pressed with a tamping tool, the repulsive force of the ballast filled below the sleeper c increases, causing the ballast to escape upward and in the left and right directions where the repulsive force is smaller, resulting in the filling amount of ballast on the lower surface of the sleeper. There was a phenomenon in which the amount of initial subsidence of the rail increased due to insufficient amount of rail. As a result, in order to actually prevent this, the ballast has to be pierced twice with the tamping tool, which makes the tamping operation less efficient.

The present invention was proposed to improve the drawbacks of the conventional tamping tools as described above. To provide a tamping tool which prevents a ballast vibrating at a frequency from escaping upward and in the lateral direction of the tamping tool.

Hereinafter, the present invention will be specifically explained based on illustrated embodiments.

FIG. 2 is a perspective view of the tamping tool of the present invention, in which reference numeral 1 indicates an arm of the tamping tool;
Reference numeral 2 denotes a ballast pressing portion provided at the tip of this arm 1. On the surface of this ballast pressing part 2, a plurality of protrusions 3 are provided at intervals in the longitudinal direction. This vertical protrusion 3 restricts movement of the ballast in the left and right direction. Furthermore, similar protrusions 4 are provided on the surface of the ballast pressing part 2 along the upper edge of the pressing part 2. This protrusion 4 restrains the ballast attempting to move upward along the longitudinal protrusion 3.

As mentioned above, the tamping tool of the present invention is provided with protrusions 3 and 4 on the surface of the ballast pressing part to restrain the upward and lateral movement of the ballast. When the ballast at the lower part of the sleeper is compacted by the ballast b, which vibrates at a high frequency, the ballast b, which vibrates at a high frequency, is obstructed by the protrusions 3 and 4 in the upper and lateral directions of the pressing part 2, as shown in Fig. 3a and b. There is no escape. Therefore,
The ballast pressed by the tamping tool is strongly packed into the lower part of the sleeper c.

As described above, according to the tamping tool of the present invention, it is possible to effectively fill the lower part of the sleeper with ballast using the vibration filling method, so it is possible to achieve the same ballast filling effect as conventional double-punch tamping with a single ballast filling effect. Can be obtained by tamping. As a result, the efficiency of the tamping operation is greatly improved, and there is an advantage that the working distance per hour is increased.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a conventional tamping tool and its usage state, Fig. 2 is a perspective view showing the tamping tool of the present invention, and Figs. 3 a and b are a side view and a plan view showing its usage state. . 1: Arm of tamping tool, 2: Ballast pressing part, 3, 4: Projection.

Claims (1)

[Scope of utility model registration request] It has an arm and a ballast pressing part provided at the tip of the arm, and a protrusion for ballast restraint is formed in the vertical direction on the surface of the ballast pressing part, and along the upper edge of the surface of the ballast pressing part. A tamping tool for a track straightening machine characterized by forming a protrusion for ballast restraint.