JPH06185055A - Sound arrester - Google Patents

Abstract

PURPOSE:To simplify a sound arrester by separately covering the hammer section and centrizer section of a percussion type drill with a detachable sound- insulating can body while a drilling rod is covered with expansible sound- insulating bellows. CONSTITUTION:A hammer 5 movably installed to a guide cell 4 is covered with a detachable sound-insulating can body 1 while centrizers 6, 7 are covered with a sound-insulating can body 2. A drilling rod 8 is covered with an expansible sound-insulating bellow pipe 3. A high striking sound in the hammer section 5 is absorbed while noises generated in the drilling rod 8 and the centrizers 6, 7 are also absorbed. The can body 1 is divided previously so that transportation, mounting and handling are facilitated. Accordingly, a sound-insulating effect can be improved by a simple structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof device directly attached to a drilling device in order to suppress noise generated from the drilling device.

[0002]

2. Description of the Related Art Boring work occupies an important position in various civil engineering works such as anchor work, slope work or pouring work. As the punching machine, there is known a percussion type punching machine that punches holes while applying a striking force to a drilling rod, in addition to a rotary punching machine that punches holes only with a rotational force and a pressure input.

In such a percussion-type punching machine, a hammer driven by hydraulic pressure or the like strikes the punching rod to give a strong vibration, and this vibration is transmitted to the tip of the drilling rod to punch a target portion. In this case, a centrizer is provided in order to regulate the drilling direction of the drilling rod to be constant.

In such a punching machine, since the punching rod penetrates into the ground by hitting, there is a problem in that intense noise is generated. As the source of the noise,
A hammer portion that strikes the drilling rod with a hammer to impart vibrational force, a drilling rod portion to which vibration is propagated, and a centrizer portion that holds the drilling rod are conceivable.

Therefore, in order to prevent noise generation, it is necessary to cover at least these three places with a soundproof cover made of lead material, glass wool or the like.

[0006]

The conventional soundproof cover is
The hammer, the centralizer, the drilling rod portion, and the like were not particularly distinguished, and they were composed of a single box or the like covering all of them. Therefore, the soundproof cover made of lead material or the like has a considerable weight and becomes bulky,
Transportation, installation and removal work was extremely troublesome.

Therefore, a main object of the present invention is to provide a soundproofing device for a boring machine, which is light in weight and is easy to carry, install and remove.

[0008]

The above object is to provide a hammer and a centrizer on a guide cell, and give a striking force by the hammer while holding the attached drilling rod by the centrizer at the tip of the guide cell. ,
A soundproofing device attached to a hole punching machine for penetrating a drilling rod, the soundproofing box individually covering the hammer and the centralizer, and connecting the soundproofing boxes together and covering the drilling rod. The problem can be solved by using a soundproof bellows tube that can be expanded and contracted in the drilling direction.

[0009]

[Function] In order to effectively reduce the noise generated from the boring machine, it is necessary to completely enclose the hammer part, the centrizer part, and the boring rod, which are the generation sources, with a completely soundproof and airtight cover. desirable.

However, when a box covering all of these is prepared, since the perforation load is successively penetrated into the ground, the initial state, that is, the length corresponding to the entire length of the perforation rod is secured. However, since the soundproof box had to be the length of the hammer plus this, it was a long and heavy box.

Therefore, in the present invention, since the perforated rod is gradually penetrated into the ground, a soundproof bellows tube is used in order to minimize the soundproof cover in this portion. There is. Therefore, the remaining hammer part and centrizer part need only cover each one separately, so a small box is required, and the overall size and weight of the device can be reduced, making it extremely easy to install and remove. become.

Further, since the bellows tube is used as the soundproof cover for the perforated rod portion as described above,
Even if the length of the piercing rod changes depending on the construction site or the like, it is possible to easily cope with this.

[0013]

EXAMPLES Next, the present invention will be specifically described by way of examples. FIG. 1 is a mounting state diagram of a soundproofing device according to the present invention with respect to a boring machine M, FIG. 2 is an enlarged view of a main part thereof, and FIG. The drilling machine M is a crawler traveling carriage 15
The guide cell 4 is attached to the boom 16 from
Further, on the guide cell 4, a hammer 5 movable along the guide cell 4 is provided, and at the tip end portion of the guide cell 4, there are provided centrizers 6 and 7 as guides for drilling a drilling rod 8. There is. And, the rear end of the attached drilling rod 8 is supported by the hammer 5,
A punching force and a penetration force are applied to penetrate the drilling rod 8 into the ground. The cylinder 17 is for sliding the guide cell 4.

In punching, the pad 4a at the tip of the guide cell 4 is brought into contact with the ground, and the tilting cylinder 18 positions the guide cell 4 in a predetermined direction. In the case shown, it is vertical. When the guide cell 4 is seated in a predetermined state, the hammer 5 is moved forward by driving a chain or the like which is circulated in the guide cell 4, and
The perforating rod 8 is given a striking force to be gradually inserted.

In the boring machine having such a structure, a high impact sound is generated due to the impact at the hammer 5 part, and the vibration due to the impact is transmitted to the boring rod 8 and the centrizers 6 and 7, so that noise is generated from each part. Generate.

According to the present invention, in order to prevent noise from the boring machine, a soundproof box 1 for covering the hammer 5 and a soundproof box 2 for covering the centrizers 6 and 7 are separately provided. The bellows tube 3 that covers the perforating rod R is provided between the boxes 1 and 2.

The soundproofing devices 1 to 3 will be described in detail below.
First, since the soundproof box 1 for covering the hammer 5 is relatively large in size, as shown in FIG. 4 in detail, the rear cover 1A and the front cover 1A are longitudinally arranged for easy transportation and handling. 1B and 1B. Each of the covers 1A and 1B can be opened to the left and right by hinges 9 and 9, and even after the soundproofing device is attached,
The drilling rod 8 can be replaced, and the hammer can be inspected and repaired. A through hole 1a is formed on the front side surface of the front cover 1B, and a drilling rod 8 connected to the hammer 5 is inserted through the through hole 1a.

On the other hand, as shown in FIG. 5, the soundproof box 2 which covers the centralizers 6 and 7 is hinged to the rear side box 21 through which the guide cells 4 are inserted. The front side boxes 20A and 20B that can be opened to the left and right are attached by the above, and a sealed space surrounding the centrizers 6 and 7 is formed except for the guide cell insertion hole 21a and the drill rod insertion hole 20a. . At the time of mounting / removing the piercing rod 8, the front side boxes 20A, 20B are opened, and the holding and detaching of the piercing rod 8 by the centrizers 6, 7 is performed.

As a soundproof wall material constituting the soundproof box 1 and the box 2, as shown in FIG. 6, the outermost layer is an aluminum cover plate 30 from the viewpoint of weight reduction,
A lead material 51 as a soundproof material is laminated on the inner surface side by adhesion or the like, and a glass wool layer 52 having a predetermined thickness is further provided on the inner surface side to provide a soundproof effect. The soundproof wall material to be used is not limited to the above structure, and a structure using another soundproof material can be adopted. The hammer 5
The soundproof box 1 for covering and the soundproof box 2 for covering the centralizers 6, 7 are covered with a bellows tube 3 which connects them and covers the perforating rod 8. As shown in FIG. 7, the bellows tube 3 has a rectangular cross-sectional shape, and is fitted into the through hole 1a of the soundproof box 1 and the through hole 20a of the soundproof box 2 at both ends. It has mouth portions 3a, 3a, and the main body portion has a bellows structure that is expandable and contractable in the axial direction of the drilling rod 8. As a material for the bellows tube 3, a lead plate is used for imparting soundproofing although it is slightly disadvantageous in terms of weight. Other soundproofing materials can also be used.

The soundproof cover constructed as described above is attached to a punching machine or the like as follows. First, after installing the boring machine M at a predetermined position, the soundproof box 1 is installed in the through hole 1
It is fixed to the mounting slider 10 so that a is oriented in the drilling direction.

Next, after fixing the soundproof box 2 which covers the centralizers 6 and 7, the bellows tube 3 connecting them is attached.
When mounting the piercing rod 8, the piercing rod 8 is contracted to one side of the bellows tube 3 to insert the piercing rod 8, the head is connected to the joint coupler 5a of the hammer 5, and the front side is held by the centrizers 6 and 7. To do. After the work is completed, the soundproof cover can be removed by reversing the above operation.

In the present invention, since the soundproof covers for covering the hammer 5 and the centralizers 6 and 7 are formed separately, and the perforated rod in the middle thereof is covered with the bellows tube 3, the weight is reduced as a whole. , The soundproof cover can be easily attached and removed at the drilling site.

[Embodiment] Next, the soundproofing device according to the present invention was attached to an actual machine, and the noise prevention effect was investigated. As a result, when the soundproofing device was not attached, the noise level was 75 to 91 dB as shown in FIG. 8, whereas when the soundproofing device of the present invention was attached, the noise level was as shown in FIG. Could be reduced to 69 to 82 dB. From this test, it was found that the soundproofing device of the present invention exhibits a high soundproofing effect.

[0024]

As described above in detail, according to the present invention, it is possible to provide a soundproofing device which can be reduced in weight and can be easily attached to and detached from a punching machine.

[Brief description of drawings]

FIG. 1 is a view showing a state in which a soundproofing device according to the present invention is attached to a boring machine.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is an enlarged front view of a main part of FIG.

FIG. 4 is an overall perspective view of a soundproof box of a hammer portion.

FIG. 5 is an overall perspective view of a soundproof box of a centrizer unit.

FIG. 6 is a sectional view of a soundproof wall.

FIG. 7 is an enlarged view of a main part of the bellows tube 3.

FIG. 8 is a noise measurement graph without a soundproof cover.

FIG. 9 is a noise measurement graph with a soundproof cover.

[Explanation of symbols]

1 ... Hammer part soundproof box, 2 ... Centrizer part soundproof box, 3 ... Bellows tube, 4 ... Guide cell, 5 ... Hammer,
6.7 ... Centrizer, 8 ... Perforated rod, 9 ... Hinges

Front page continuation (72) Iku Mizuno, Iku Mizuno 4-chome, Kudankita 4-chome 35, Chiyoda-ku, Tokyo Light Industry Co., Ltd. (72) Hiroshi Niwa, 4-chome, Kudankita 4-chome, Chiyoda-ku, Tokyo Industry Co., Ltd.

Claims (1)

[Claims] 1. A drilling hole provided with a hammer and a centrizer on a guide cell, wherein a hammering force is applied by the hammer while the attached drilling rod is held by a centizer at the tip portion of the guide cell to penetrate the drilling rod. A soundproof device attached to a machine, the soundproof box for individually covering the hammer and the centralizer, and the soundproof box for connecting the soundproof boxes and covering the perforating rod, which is expandable / contractible in the drilling direction. A soundproof device comprising a soundproof bellows tube.