JPH10298913A - Tamping rammer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the vibration and shock to a worker without impairing maneuverability by fitting a handle member via two buffer materials arranged at the prescribed interval in the vertical direction on both sides of a tamping rammer main body. SOLUTION: Buffer materials 3a, 3b are fitted at the prescribed interval in the vertical direction to both side faces 4a, 4b of a tamping rammer main body 4. The buffer materials 3a, 3b are connected to the upper and lower fitting plates 15a, 15b fitted to the middle section of the lower frame bar 12b of a handle member 1 by bolts, and the handle members 1 each constituted of a handle bar 13 and a holding member 9 are fitted to the tamping rammer main body 4 via the buffer materials 3. Since two buffer materials 3a, 3b are arranged at the prescribed interval in the vertical direction on both sides 4a, 4b of the tamping rammer main body 4, the rigidity around the D-axis of the whole buffer materials 3 is increased, and the individual rigidity of the buffer materials 3a, 3b can be set low. The uncomfortable vibration and shock transferred to a worker can be reduced without deteriorating maneuverability.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tamping rammer for compacting road surfaces, embankments, buried soils, etc. in civil engineering construction work.

[0002]

2. Description of the Related Art A tamping rammer is a working machine that uses an internal combustion engine or an electric motor as a prime mover to move up and down a working press plate connected to a crank mechanism via a spring or the like to compact a road surface. Various shapes and structures are conventionally provided according to the requirements. FIG. 5 shows an example of a tamping rammer widely used in the past. Such a standard type tamping rammer is used when an operator stands on the same surface as the road surface A to be compacted and grips the grip portion 2 of the handle member 1 attached to the tamping rammer body. It is supposed to.

Further, as a tamping rammer used for a special purpose, there is a tamping rammer described in Japanese Utility Model Publication No. 144575 (Utility Model Registration No. 1829767). This is a tamping rammer suitable for the burying method of pipes called the "small width method", so that the height position of the handle grip can be appropriately changed according to the depth of the groove to be compacted and the like. Has become.

As described above, a tamping rammer includes a standard tamping rammer as shown in FIG.
As with the tamping rammer for the narrow width method described above, there are various types in which the shape and structure of the handle are modified in order to adapt to a special use.

[0005] Regardless of the type and type of tamping rammer, the handle member 1 of the tamping rammer is
It is often attached to the tamping rammer main body 4 via a cushioning material 3 made of a cylindrical vibration-proof rubber or the like (see FIG. 5). As described above, the reason why the cushioning material 3 is used between the main body 4 and the handle member 1 is that when the tamping rammer is operated, the small vibration generated in the main body 4 due to the operation of the prime mover 5 and the strong vibration of the main body 4 are caused. This is because the shock caused by the up-and-down motion is absorbed by the cushioning material 3 so as to reduce such vibration and shock transmitted to the operator holding the grip 2 of the handle.

It is considered that if the tiny vibrations caused by the operation of the prime mover 5 are transmitted to the worker as they are, the worker will be tired unnecessarily, and the shock due to the vertical movement of the main body 4 will cause the worker to grip the handle. If it is transmitted as it is, not only will the maneuverability deteriorate, but also the worker may be injured. Therefore, a buffer material is interposed between the main body 4 and the handle member 1 to absorb and reduce such vibrations and shocks, thereby preventing a decrease in work efficiency due to worker fatigue and improving work safety. It is trying to plan.

[0007]

As described above, it can be said that the functional importance of the cushioning material has been recognized in the past. However, by setting the rigidity of the cushioning material to be low, the vibration transmitted to the worker can be reduced. No attempt has been made to minimize the impact and impact. This is because it has been considered that there is no choice but to set the stiffness of the cushioning material to a range that does not impair the maneuverability.
In other words, from the viewpoint of reducing unpleasant vibrations and shocks transmitted to the worker, it is considered that the stiffness of the cushioning material is preferably as low as possible, but if the stiffness is too low, the maneuverability is rather deteriorated. Therefore, it is impossible to prevent a decrease in work quality and improve work safety.

More specifically, the tamping rammer body which repeats up and down movement is prevented from falling down.
The role of the handle in the tamping rammer is to support the main body so that the main body does not rotate around the vertical movement direction, or to guide the body in the direction to compact the road surface while repeating the vertical movement. However,
If the rigidity of the cushioning material is set low, for example, as shown in FIG. 6, the handle member 1 may move up and down around the cushioning material 3, or as shown in FIG. This causes a situation in which 1 rotates left and right. If the rigidity of the cushioning member 3 is set to be low in this way, the rotation of the main body and the disturbance of the vertical movement will be allowed within the rigidity range. Therefore, it is attempted to operate the tamping rammer by grasping the handle. For the worker, it becomes very difficult to steer.

As described above, when determining the rigidity of the cushioning material, it is more important to not impair the maneuverability than to reduce the vibration and impact transmitted to the operator.
There has been a tendency to use cushioning materials having high rigidity to some extent, and the purpose of reducing vibration and impact has not been sufficiently achieved.

[0010] In particular, in a tamping rammer for a narrow width construction method, there is a strong tendency to use a relatively rigid cushioning material. This is due to the fact that the tamping rammer for the narrow width construction method is slightly inferior in maneuverability as compared with a normal tamping rammer. Specifically, when the worker operates the tamping rammer for the narrow width method lowered into the groove from the ground, when the handle grip is set at a higher position, the handle is smaller than that of the normal tamping rammer. There is a problem that the position of the gripping part moves away from the position of the center of gravity of the main body. In other words, the tamping rammer for the narrow width method is intended to remotely control the heavy body that repeats violent up and down movement on the premises from the ground, so it can be said that the maneuverability is originally poorer than the case of the normal tamping rammer. . In addition, since the size of the handle member is set longer than that of a normal tamping rammer, the torque at the grip portion also increases. For this reason, if the tamping rammer for the narrow width construction method is of the same rigidity as the cushioning material of a normal tamping rammer, the play allowed by the cushioning material is enlarged, and the maneuverability deteriorates.

From the above, in a tamping rammer for a narrow width construction method, a relatively rigid cushioning material is often employed, so that uncomfortable vibrations and impacts transmitted to the operator are increased accordingly. is there.

When the bottom of a relatively deep groove is compacted, an extension work board 11 for the consolidation of the groove bottom as shown in FIG. When such an extension work panel 11 is attached, the center of gravity of the tamping rammer becomes high. Therefore, as in the case where the handle grip is set at a relatively high position in the tamping rammer for the narrow width method, it is usually used. The maneuverability becomes worse compared with the case of the tamping rammer. Therefore, in this case as well, unless a cushioning material having a high degree of rigidity is used, workability is reduced due to deterioration in maneuverability, and danger is increased.

As described above, in any type of tamping rammer, even if the rigidity of the cushioning material is set low to reduce the unpleasant vibration and impact transmitted to the operator as much as possible, the maneuverability is deteriorated. There was a limit because of the problem. The present invention has been made to solve such a problem, and compared with a conventional tamping rammer, the rigidity of a cushioning material interposed between a main body and a handle member is reduced without impairing maneuverability. An object of the present invention is to provide a tamping rammer that can reduce vibration of a main body transmitted to an operator holding a handle by setting the tamping rammer low.

[0014]

According to a first aspect of the present invention, there is provided a tamping rammer of the type in which a handle member is attached to both sides of a main body via a cushioning material. To this end, at least two of the cushioning members are arranged on each side of the main body at a predetermined interval.

The tamping rammer according to claim 2 is the tamping rammer according to claim 1, wherein
The handle member attached to the main body includes a mechanism capable of changing the height position of the handle grip.

Further, the tamping rammer according to claim 3 is the tamping rammer according to claim 2,
It is characterized in that two cushioning materials are provided on each side of the main body, and the two cushioning materials on each side are arranged in parallel in the vertical direction.

[0017] The tamping rammer according to claim 4 is
The tamping rammer according to claim 1, wherein
It is characterized by the fact that an extension work board for groove bottom crimping is installed as a rolling press.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a tamping rammer according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of one embodiment of a tamping rammer according to the present invention. In FIG. 1, reference numeral 1 denotes a handle member, which includes a frame bar 12, a handle bar 13, and a holding member 9. Reference numeral 4 denotes a main body of the tamping rammer, and 2 is provided on the left side surface (front side in the figure) 4a of the main body 4.
The three cushioning members 3a and 3b are arranged side by side at predetermined intervals in the vertical direction. Although not shown in this figure,
Similarly to the left side surface 4a, two cushioning members are attached to the right side surface 4b of the main body 4 at predetermined intervals in the vertical direction.

The frame bar 12 is an upper frame bar 1
2a and a lower frame bar 12b. A straight portion having a predetermined length is formed in the upper frame bar 12a, and a rear end portion thereof is curved downward. Further, a handle bar 13 is attached to the upper frame bar 12a via a sliding member and a holding member 9 as described later.
At the middle part of the lower frame bar 12b, a mounting plate 15a is provided upward and a mounting plate 15b is provided downward. The mounting plate 15a and the cushioning material 3a, and the mounting plate 15b and the cushioning material 3b are joined by bolts or the like, respectively, so that the handle member 1 including the frame bar 12, the handle bar 13, and the holding member 9 becomes a cushioning material. 3 to be attached to the main body 4.

FIG. 2 is a side view showing the structure of the handle member 1 of the tamping rammer shown in FIG. Numeral 8 denotes a sliding member provided on a straight portion of the upper frame bar 12a, which is provided on the upper frame bar 12a within a range from a position shown to a rear protruding piece 18 provided on a rear portion of the upper frame bar 12a. Is configured to be slidable. Further, the sliding member 8 is provided with a stopper 17 which can fix the sliding member 8 at an arbitrary position within the above range.

The handle bar 13 has an end 13a connected to a sliding projection 20 provided on the sliding member 8, and has a handle-side projection 19 and an upper frame bar 1 connected thereto.
The rear projection 18 provided on 2 a is connected to the frame bar 12 by being connected via the holding member 9. Each connecting portion is configured to be rotatable.

For this reason, when the sliding member 8 is moved backward from the position shown in FIG. 2, the handle bar 13 gradually rises as the sliding member 8 approaches the rear projection piece 18, and finally, Will be in the state shown in FIG. In this way, the height position of the grip portion 2 can be changed from a normal position as shown in FIG. 2 to a very high position as shown in FIG. Since the sliding member 8 can be fixed at an arbitrary position on the upper frame bar 12a by using the stopper 17 as described above, the grip portion 2 can be held at a desired height position.

Next, the operation of the tamping rammer according to the present embodiment will be described. In this tamping rammer, as described above, since the cushioning members 3a and 3b are arranged at a predetermined interval, compared with the conventional one in which only one cushioning member is arranged on each of the left and right side surfaces of the main body. Thus, the rigidity of the entire cushioning material is increased. More specifically, with respect to the rigidity around the D-axis shown by the dashed line in FIG. 1, when there is only one cushioning material, the cushioning material itself becomes the center of rotation, whereas in the present embodiment, If the two cushioning materials are arranged at a predetermined interval,
Either one of the two cushioning materials or any point between the two cushioning materials becomes the center of rotation, so that at least one of the cushioning materials is at a position somewhat distant from the center of rotation. Since it can resist displacement, it can be said that the rigidity around the D-axis is higher than in the case of one cushioning material. In the present embodiment, the cushioning members 3a and 3b are arranged in parallel in the vertical direction, so that the handle member 1
Can be strongly opposed to the displacement in the vertical direction (vertical direction), and as a result, it can be said that the rigidity around the E axis indicated by the two-dot chain line in FIG. 1 is high.

Here, the maneuverability of the tamping rammer is affected by the rigidity of the whole cushioning material, whereas the efficiency of absorbing vibration and shock is affected by the individual rigidity of each cushioning material. It is believed that there is. Therefore, in the tamping rammer according to the present embodiment, since the rigidity of the entire cushioning material is increased by adopting the above-described configuration, the individual rigidity of each cushioning material is set lower by the increased amount. be able to. In other words, even if the individual stiffness of each cushioning material is set to a certain low level, if the rigidity of the cushioning material as a whole reaches the same level as the conventional cushioning material, the maneuverability is impaired compared to the conventional cushioning material. In addition, it is possible to reduce unpleasant vibrations and shocks transmitted to the operator holding the handle.

In this embodiment, two cushioning members are arranged on both left and right sides of the main body 4 at predetermined intervals in the vertical direction. This is because the present embodiment is applied to a tamping rammer for a narrow width construction method. This is because the example is applied, and in consideration of the case where the handlebar 13 is raised and used as shown in FIG. 3, the rigidity around the E-axis shown in FIG. Is intended.
However, needless to say, the present invention is not limited to this embodiment, and the type of the tamping rammer to be applied may be a standard type or a narrow width method. Further, the cushioning members may be arranged in the horizontal direction, and three cushioning members may be attached to each side surface, and the cushioning members may have different rigidities.

FIG. 4 is a view showing another embodiment of the tamping rammer according to the present invention. More specifically, FIG. 4 shows a state where the extension work board 11 is mounted on the tamping rammer shown in FIG. It is a side view. In the tamping rammer of FIG. 1, the pressing plate 10 is mounted at a position shown by a chain line in this figure. In this embodiment, the extension work is performed so that the bottom of the deeper groove can be compacted. Panel 1
1 is attached. For this reason, since the center of gravity of the main body becomes higher than that of the tamping rammer of FIG. 1, the maneuverability is inferior. Further, as shown in this figure, when the position of the handle grip 2 is set high, the maneuverability is further deteriorated.

Therefore, in the case where such a tamping rammer is provided with one cushioning material on each side of the main body 4 as in the prior art, it is necessary to select a tamping rammer having a certain degree of rigidity so as not to deteriorate the maneuverability. I have no choice but
As a result, the vibration and shock transmitted to the worker are increased. However, if two cushioning members are arranged at predetermined intervals on each side of the main body 4 as in the present embodiment, the cushioning can be increased as described above. Since the individual rigidity of each cushioning material can be set low without lowering the rigidity of the entire material, it is possible to preferably reduce the unpleasant vibration and impact transmitted to the operator without deteriorating the maneuverability. it can.

[0028]

As described above, according to the present invention,
Since at least two cushioning materials attached to both sides of the main body are provided on each side and are arranged at predetermined intervals, even if the rigidity of each cushioning material is set to a certain degree,
As the overall rigidity of the cushioning material can achieve the same level of rigidity as the conventional cushioning material, the operator can reduce the rigidity of each cushioning material without impairing maneuverability compared to the conventional tamping rammer. Uncomfortable vibration and impact transmitted to the vehicle can be reduced.

The burden on the worker is reduced by reducing the unpleasant vibration transmitted to the worker.
It is possible to prevent a danger such as an accident caused by fatigue and prevent a decrease in work efficiency.

Particularly, even in a tamping rammer for a narrow width construction method or a tamping rammer equipped with an extension work panel, which is originally poor in maneuverability, unpleasant vibration and impact transmitted to an operator can be reduced, which is very useful. It is an invention.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a tamping rammer according to the present invention.

FIG. 2 is a side view showing the structure of a handle member 1 of the tamping rammer of FIG.

FIG. 3 is a side view showing the structure of the handle member 1 of FIG. 2 in a state where the handlebar 13 is raised.

FIG. 4 is a diagram showing a state where an extension work board is mounted on the tamping rammer of FIG. 1;

FIG. 5 is a view showing an example of a conventional standard tamping rammer.

FIG. 6 is a view showing the amount of vertical play of a handle member by a cushioning material, taking a tamping rammer of FIG. 5 as an example.

FIG. 7 is a diagram showing the horizontal play amount of the handle member by the cushioning material, taking the tamping rammer of FIG. 5 as an example.

FIG. 8 is a view showing a state where an extension work board is attached to the tamping rammer of FIG. 5;

[Explanation of symbols]

 1: handle member, 2: gripping part, 3: cushioning material, 4: main body, 5: motor, 8: sliding member, 9: holding member, 10: rolling platen, 11: extension work panel, 12: frame bar, 13: Handlebar, 15: Mounting plate, 17: Stopper, 18: Rear projection piece, 19: Handle side projection piece, 20: Sliding projection piece

Claims (4)

[Claims] 1. A tamping rammer having handle members mounted on both sides of a main body via cushioning materials, wherein said cushioning materials are provided at least two on each side of the main body and are arranged at predetermined intervals. A tamping rammer characterized by being 2. The tamping rammer according to claim 1, wherein the handle member attached to the main body has a mechanism capable of changing a height position of the handle grip. 3. The body according to claim 2, wherein on each side of the body, two cushioning members are arranged side by side in the vertical direction.
A tamping rammer according to item 1. 4. The tamping rammer according to claim 1, wherein an extension work panel for consolidating the groove bottom is mounted as the consolidation press.