JP4463636B2 - Engine driven work machine - Google Patents

Description

  The present invention relates to an engine-driven work machine that drives a work machine such as a compressor, a generator, and a pump by an engine, and more particularly to a waterproof and sound-insulating structure around the door.

  This type of engine-driven work machine is placed on a base member called a base and housed in a soundproof structure case assembled on the base. As a result, noise countermeasures around the engine-driven work machine have been taken, but further countermeasures may be required, and the case side wall has a double shielding structure to prevent sound leakage especially from the vicinity of the door provided in the case. In order to prevent this, a double sealing material is used.

  For example, the one disclosed in Patent Document 1 shown in FIG. 7 employs a double shielding structure. That is, the outer wall 200 of the soundproof case is shielded with a double structure in which an air layer is formed between the outer iron plate 200a and the inner iron plate 200b, and the outer wall 200 of the soundproof case with the double shield structure is opened and closed. A door 210 is provided.

And the engaging part of the opening-and-closing door 210 and the window hole to which this opening-and-closing door 210 is assembled | formed is formed in step shape, and the sealing materials 220 and 221 are inserted in this step-shaped part in two steps. Therefore, the outer iron plate 210a and the inner iron plate 210b of the opening / closing door 210 have an air layer at the center between them, and the space between the outer walls is formed by the sealing materials 220 and 221 at the peripheral joint portion forming a step shape. The inside and outside are sealed.
Japanese Utility Model Publication No. 63-110637

  In the case shown in FIG. 7, the open / close door 210 is shielded but heavy. For this reason, especially in a large sized working machine, the weight of a door and a frame becomes too heavy, and is inconvenient. In addition, in the double seal structure using the sealing materials 220 and 221, it is necessary to firmly press the opening / closing door 210 in order to prevent rainwater intrusion from the sealing portion between the opening / closing door 210 and the door hole and sound insulation. A large force is required to open and close the door, and there is a difficulty in operability.

  The present invention has been made in consideration of the above-described points, and an object thereof is to provide an engine-driven work machine having a soundproof case having a structure with good shielding performance and door opening / closing operability.

In order to achieve the above object, in the present invention,
An engine and a work machine main body driven by the engine are accommodated in a soundproof case, and a door that can be opened and closed by rotation and a door frame body that supports the door are provided on a side wall of the soundproof case, And the door frame body have a built-in sound absorbing material, and the first seal material (70) and the second seal material (81) are arranged in a double annular shape at the portions in contact with each other. In
The door frame body has an annular groove that is recessed by one step from the surface of the door frame body at the contact portion with the door, and is formed in an annular shape on the contact surface with the door at the inner edge of the annular groove. The first sealing material (70) is arranged,
The edge of the door is bent at a right angle toward the door frame and bites into the space in the annular groove, and the door frame is elastic and has at least a door opening end among the edges of the door. An engine-driven work machine, characterized in that a contact member (80) for contact is disposed;
Is to provide.

  As described above, according to the present invention, the door frame body of the soundproof case is provided with an annular groove that is recessed by one step from the surface of the door frame body, and an annular sealing property is formed on the contact surface with the door at the inner edge of the annular groove. Since the abutting member is provided, an engine-driven work machine having a soundproof case with good shielding and waterproofing around the door can be provided.

Further, since the storage frame for storing and holding the sound absorbing material on the back surface of the door has a function as a reinforcing material that increases the rigidity of the door, the rigidity of the door is further improved.
Furthermore, since the annular sealing material disposed on the back cover pushes the storage frame from the back, resonance can be suppressed even when the door is enlarged and the resonance frequency is lowered, and the waterproof and sound insulation effect can be improved. it can.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a side view of an embodiment of the present invention. As shown in the figure, the engine-driven work machine 100 has a configuration in which an engine 50, a generator 51, which is a work machine, a muffler 52, and the like are arranged inside a soundproof case, as indicated by a broken line. In the soundproof case, the upper soundproof case 110 is provided with an intake duct 120 and a wind exhaust duct 130 at the left and right positions in the figure, and the lower case 140 is provided with a door frame 150 and doors 180 and 185. The doors 180 and 185 are supported on the door frame 150 by a hinge 60 disposed on the back surface of the door, and are opened and closed by being operated by the handle 65. The lower case 140 is supported by the base 170.

  FIG. 2 shows the door frame 150 shown in FIG. 1 with the doors 180 and 185 removed. The door frame 150 is constituted by a continuous body having a U-shaped cross section, and the exterior is a rectangular shape that is long in the vertical direction as shown in the figure, and is composed of four sides. These are called the upper frame 151, the lower frame 152, the right frame 153, and the left frame 154, and indicate the position on the door frame 150.

  A first seal member 70 and a second seal member 81 as sealing contact members are provided at the center of the door frame 150 so as to surround the door (not shown). Two hinges 60 are provided in the vertical direction at the support end, and a third seal member 80 as a contact member is provided in the vertical direction on the opening end side.

  3 is a cross-sectional view taken along the line AA in FIG. This cutting position is substantially the center of the right frame 153 and the left frame 154, and the figure shows a state viewed from below.

  The right frame 153 and the left frame 154 are configured as columns of substantially U-shaped members, and the surface constituent portions 153a and 154a drawn on the upper side in the drawing are flush with the surface of the soundproof case. The surface constituent portions 153a and 154a are connected to annular grooves 153b and 154b having a substantially rectangular cross section arranged so as to surround the door, and the door central portions of the annular grooves 153b and 154b are drained. It continues to the groove portions 153c and 154c. A first sealing material 70 is provided on the door contact surfaces of the draining grooves 153c and 154c.

  Further, a hinge 60 is provided in the annular groove 153b, and a third sealing material 80 is provided in the annular groove 154b.

  Back covers 156a and 155a are attached to the back side of the right frame 153 and the left frame 154 with bolts 62 so as to form a space between the right frame 153 and the left frame 154, and the back of the formed space The sound absorbing material 63 is filled on the side.

  The back covers 156a and 155a form part of a plate-like member arranged so as to surround the periphery of the door, and an opening is formed at a portion corresponding to the door position, and the periphery of the opening is formed inside the case. Crank portions 156b and 155b are formed by being depressed one step toward the bottom. A second sealing material 81 is provided in an annular shape around the opening in the crank portions 156b and 155b.

  4 is a cross-sectional view showing a state in which a door 180 that is opened right is attached to the door frame 150 shown in FIG. The door 180 has a configuration in which the sound absorbing material 63 is attached to the back surface of the flat plate portion 180a that is flush with the surface of the case by a storage frame 182. The door 180 is supported by the door frame 150 by a hinge 60 and is centered on the pivot 60b. And turn.

  The edges of the flat plate portion 180a are formed with edges 180b and 180c that are bent at right angles to the flat plate portion 180a. The edges 180b and 180c bite into the annular grooves 153b and 154b of the door frame 150. Since the sound propagation path between the inside and outside of the case becomes long and bent and the rigidity of the door is increased, the door can be reduced in weight.

  The storage frame 182 supports the edge of the sound absorbing material 63 and has an opening at the center. The storage frame 182 forms a space between the door frame 150 and the door 180 at a position closer to the center of the door than the annular grooves 153 b and 154 b of the door frame 150, and passes through the sealing material 81 and the sealing material 70. The sound propagation path is longer and bent.

As a result, the sound propagation path between the door frame 150 and the door 180 changes the direction in the direction substantially perpendicular to 5 times, and is sealed by the first seal material 70 and the second seal material 81, and The door opening end on the left side of the figure also has a sound propagation preventing effect by the third sealing material 80 and has a sufficient shielding effect. Further, the main function of the third sealing material 80 is that the other end of the door 180 supported by the door frame 150 with a hinge 60 at one end in the closed state is provided by a latching device for the handle 60 (not shown) and the sealing material 80. An object of the present invention is to obtain a latching device that is both strong and elastic.
FIG. 5 is a longitudinal sectional view showing a state where the door 180 is attached along the line BB in FIG. A partition wall 182b is provided at the center of the storage frame 182 of the door 180, and a sound insulation cover 183 is further provided. Accordingly, the weight of the door 180 is reduced and the noise of the engine disposed in the immediate vicinity of the sound insulation cover 183 is sound-insulated, so that the sound insulation effect can be improved.

  Further, FIG. 5 is a vertical cross-sectional view showing how rainwater Q0 and Q1 flow through the draining grooves 151c and 152c. Rainwater flows into the gap between the door frame 150 and the door 180, but is guided to the outside of the case along the peripheral edge of the door 150 by the draining grooves 151 c and 152 c and discharged outside the case.

  FIG. 6 shows a state in which the door 180 of the embodiment shown in FIG. 5 is opened. The door 180 has high rigidity due to the edges 180b and 180d and the storage frame 182, and the storage frame 182 supports the sound absorbing material 63 on the back surface of the door 180, and further has a sound insulation cover 183 in the center thereof. . On the other hand, the door frame 150 is composed of an annular groove 154b and the like and first to third sealing materials 70, 81, 80.

  The combination of the door frame 150 and the door 180 can provide a structure excellent in waterproofness, that is, rainwater intrusion prevention and sound insulation, that is, leakage of internally generated sound.

The side view which shows the external appearance of one Example of this invention. The partial side view which shows the structure of the door frame in the Example of FIG. The cross-sectional view along the AA line in FIG. The cross-sectional view which shows the state which combined the door with the cross section of FIG. The longitudinal cross-sectional view of the position equivalent to the BB line in FIG. 2 of the other Example of this invention. The perspective view which shows the state which opened the door of the Example shown in FIG. The cross-sectional view which shows the structure of the door part in the conventional waterproof case.

Explanation of symbols

50 engine, 51 work machine body, 52 muffler, 60 hinge,
62 bolts, 63 sound absorbing material, 65 handles,
70 first sealing material (sealing contact member), 80 third sealing material (contact member), 81 second sealing material (sealing contact member), 100 soundproof type engine drive working machine, 110 upper case, 120 intake duct, 130 exhaust duct,
140 lower case, 150 door frame,
150a, 151b, 152b, 153b, 154b annular groove,
151-154 Frame part,
151c, 152c, 153c, 154c draining groove,
155-158 Back cover, 170 base, 180, 185 door,
182 storage frame, 183 sound insulation cover, 200 outer wall of soundproof case,
210 Opening / closing door, 220, 221 Sealing material.

Claims (3)

An engine and a work machine main body driven by the engine are accommodated in a soundproof case, and a door that can be opened and closed by rotation and a door frame body that supports the door are provided on a side wall of the soundproof case, And the door frame body have a built-in sound absorbing material, and the first seal material (70) and the second seal material (81) are arranged in a double annular shape at the portions in contact with each other. In
The door frame body has an annular groove that is recessed by one step from the surface of the door frame body at the contact portion with the door, and is formed in an annular shape on the contact surface with the door at the inner edge of the annular groove. The first sealing material (70) is arranged,
The edge of the door is bent at a right angle toward the door frame and bites into the space in the annular groove, and the door frame is elastic and has at least a door opening end among the edges of the door. An engine-driven work machine characterized in that a contact member (80) for contact is disposed. The engine-driven work machine according to claim 1, wherein
On the inner surface side of the door, there is provided a storage frame that is formed as an opening except for the outer peripheral portion and stores and holds the sound absorbing material, and at least a part of the opening is covered with a removable sound insulating cover. Engine-driven work machine. The engine-driven work machine according to claim 1 or 2 ,
An engine-driven work machine comprising: a back cover that is attached to a back surface of the door frame body and covers a region that includes the back surface of the door frame body and reaches a peripheral edge of the back surface of the door.

Images