JP2021010146A - Inside structure of cab of construction machine - Google Patents

Abstract

To provide an inside structure of a cab of a construction machine which can provide an operator with clear speaker sound when an air outlet for air-conditioned wind and a speaker are both included behind the driving seat in the construction machine.SOLUTION: There is provided an inside structure of a cab of a hydraulic shovel. Behind the driving seat, a left-side speaker 7L and a right-side speaker 7R are arranged with a space in a horizontal direction in between. Between the left-side speaker 7L and the right-side speaker 7R, an air outlet (front end part of an air route 51) for blowing air-conditioned wind into the inside of the cab is arranged. The left-side speaker 7L and the right-side speaker 7R are fixed so that their respective vibrators 70L and 70R face to the front. The left-side speaker 7L and the right-side speaker 7R and the air outlet are so arranged that the respective output directions of the speaker sounds and the direction of sending the air-conditioned wind do not intersect with each other.SELECTED DRAWING: Figure 3

Description

The present invention relates to the interior structure of a cab of a construction machine.

Conventionally, an air conditioner for vehicles for construction machinery has been proposed (see, for example, Patent Document 1). In Patent Document 1, as shown in FIGS. 3 and 4, the conditioned air flowing through the first pillar duct (121) and the second pillar duct (122) arranged on the left and right sides is the wall surface (124a) (outer circumference of the duct). Section (124)) merges at the air outlet (125) and then turns towards the seat (210).

Further, as another technique, there is a technique in which speaker interior bodies are erected on both sides of a rear parcel of a vehicle (automobile) and speakers are installed inside the speaker interior (see, for example, Patent Document 2). In Patent Document 2, the speaker is arranged so that the sound wave radiation direction in which the three-dimensional sound range is generated can be obtained at the position of the occupant in the front part (driver's seat and passenger's seat) of the vehicle interior.

Japanese Unexamined Patent Publication No. 2001-30738 JP-A-58-67540

If a speaker and an air outlet that blows air-conditioning air into the room are installed behind the driver's seat of a construction machine, it may be difficult to hear the speaker sound due to the influence of the air-conditioning air.

Therefore, the present invention provides an interior structure of a cab of a construction machine capable of providing a clear speaker sound to an operator even when a speaker and an air-conditioning air outlet are provided behind the driver's seat of the construction machine. The purpose is to provide.

In order to achieve the above object, the present invention is an indoor structure of a cab of a construction machine, in which a left side speaker and a right side speaker are arranged behind the driver's seat with a space between the left side speaker and the right side speaker. An air outlet that blows air conditioning air into the room is arranged between the right side speaker, and the left side speaker and the right side speaker are fixed so that their respective vibrating plates face forward, and the left side speaker and the right side speaker are fixed. The air outlet is a construction machine characterized in that the output direction of each speaker sound and the blowing direction of the air conditioning air do not intersect with each other until the speaker sound reaches the driver's seat. It provides the interior structure of the cab.

Here, a housing is installed behind the driver's seat, and in the housing, a left side speaker area for arranging the left side speaker, a right side speaker area for arranging the right side speaker, the left side speaker area, and the above. An outlet area for arranging the outlet is provided between the right speaker areas, and the left speaker is fixed in the left speaker area so that the diaphragm of the left speaker faces forward, and the left speaker is fixed in the right speaker area. The right side speaker is fixed so that the vibrating plate of the right side speaker faces forward, and an air passage penetrating the front-rear direction of the housing is formed in the air outlet area, and the front end of the air path is formed. It is preferable that the portion functions as the air outlet and an air conditioning duct is connected to the rear end portion.

Further, the housing is provided with a plurality of fixed portions in the vicinity of the left side speaker and the vicinity of the right side speaker, and the housing is provided with a plurality of fixing portions having the plurality of fixed portions provided in the cab. It is preferable that it is attached to the cab by being fixed to the portion.

Further, it is preferable that at least a part of the cross-sectional shape of the air path has a shape along at least a part of the outer shape of the housing.

Further, it is preferable that the housing is equipped with a net-like cover that covers the entire front area of the housing.

Further, it is preferable that a sound absorbing material is provided on the inner surface of the air passage.

Further, the outlet is arranged at a position where the blowing direction of the air conditioning air extends linearly toward the vicinity of the back of the head of the operator seated in the driver's seat, and the left speaker has an output direction of the output speaker sound. The right speaker is arranged so as to extend linearly toward the vicinity of the left ear of the operator, and the right speaker is arranged so that the output direction of the output speaker sound extends linearly toward the vicinity of the right ear of the operator. Is preferable.

According to the present invention, since the output direction of each speaker sound of the left speaker and the right speaker does not intersect with the blowing direction of the air conditioning air, each speaker sound is not easily affected by the air conditioning air, and a clear speaker sound is provided to the operator. It is possible to do.

The figure which shows the cab of the hydraulic excavator (construction machine) by embodiment of this invention. FIG. 1 II arrow view (view of the rear of the cab chamber from the front). Front view showing the housing. Top view showing the housing. A front view showing a housing with a cover attached. The plan view which shows the housing with the cover attached. VII arrow view of FIG. The figure which shows the air path which concerns on the modification. The figure which shows the air path which concerns on another modification. The figure which shows the air path which concerns on still another modification. The figure which shows the housing which concerns on the modification. The figure which shows the housing which concerns on another modification. The figure which shows the housing which concerns on still another modification.

<1. Embodiment>
The indoor structure of the cab of the construction machine according to the embodiment of the present invention will be described with reference to FIGS. 1 to 7. Hereinafter, as an example of the cab of the construction machine according to the present invention, the cab (also referred to as a square cab) 1 of the hydraulic excavator shown in FIG. 1 will be illustrated.

As shown in FIG. 2, inside the cab 1, a driver's seat 3 and a housing 5 arranged behind the driver's seat 3 are provided.

The driver's seat 3 is a seat for the operator to sit on, and is arranged substantially at the center of the cab 1 in the width direction (left-right direction).

The housing 5 is a member for integrating the air-conditioning air outlet and the speaker, and is attached in the vicinity of the cross member connecting the upper ends of the left and right rear pillars (C pillars).

As shown in FIGS. 3 and 4, the housing 5 is configured as a substantially rectangular parallelepiped member elongated in the left-right direction. The housing 5 is provided with a left speaker area LA, a right speaker area RA, and an outlet area CA.

The left speaker 7L is fixed to the left speaker area LA so that the diaphragm 70L of the left speaker 7L faces forward. Further, in the right speaker area RA, the right speaker 7R is fixed so that the diaphragm 70R of the right speaker 7R faces forward.

On the other hand, in the air outlet area CA, an air path 51 penetrating the front-rear direction of the housing 5 is formed between the left speaker area LA and the right speaker area RA. The cross-sectional shape of the air path 51 has a substantially rectangular shape along the outer shape of the housing 5. That is, the upper surface and the lower surface of the air path 51 are substantially parallel to the upper surface and the lower surface of the housing 5, and the left and right side surfaces of the air path 51 are substantially parallel to the left and right side surfaces of the housing 5.

An air conditioning duct (not shown) is connected to the rear end side of the air path 51. The front end side of the air path 51 functions as an air outlet for blowing air conditioning air from an air conditioning duct (not shown) into the room.

A sheet-shaped sound absorbing material 510 for absorbing the air blowing sound accompanying the air conditioning air from the air conditioning duct is attached to the inside of the air path 51.

Further, in the housing 5, a plurality of fastening holes 531H to 534H are formed in the vicinity of the left side speaker 7L and the vicinity of the right side speaker 7R.

Specifically, the fastening hole 531H is formed on the upper side of the left speaker 7L, and the fastening hole 532H is formed on the lower side of the left speaker 7L. Further, a fastening hole 533H is formed on the upper side of the right side speaker 7R, and a fastening hole 534H is formed on the lower side of the right side speaker 7R.

The housing 5 is bolted to the cab 1 (specifically, a bracket (not shown) provided in the cab 1) via the plurality of fastening holes 531H to 534H described above.

As shown in FIGS. 5 and 6, the housing 5 is equipped with a mesh-like cover 8 that covers the entire front area of the housing 5. The gap between the nets of the cover 8 is formed so as to prevent the human fingertip from passing through.

As shown in FIGS. 6 and 7, the horizontal length of the cover 8 is longer than the horizontal length of the housing 5, and the vertical length of the cover 8 is longer than the vertical length of the housing 5. long. Further, the thickness of the cover 8 in the front-rear direction is thinner than the thickness of the housing 5 in the front-rear direction.

The housing 5 described above is attached so as to fit into a recess (not shown) formed inside the rear surface of the cab 1.

In the state where the housing 5 is attached to the cab 1, the front end side (air conditioning air outlet) of the air path 51 is directed toward the vicinity of the back of the operator's head where the blown air conditioning air is blown in the driver's seat 3. It is placed in an extended position.

Further, the left speaker 7L fixed to the housing 5 is arranged so that the output direction of the output speaker sound extends toward the vicinity of the left ear of the operator seated in the driver's seat 3. Further, the right side speaker 7R fixed to the housing 5 is arranged so that the output direction of the output speaker sound extends toward the vicinity of the right ear of the operator seated in the driver's seat 3.

In particular, in the present embodiment, the output directions of the left speaker 7L and the right speaker 7R are substantially parallel to the blowing direction of the air conditioning air blown from the front end side (air conditioning air outlet) of the air path 51. It is fixed to the housing 5 so as to be. Therefore, the output directions of the speaker sounds of the left speaker 7L and the right speaker 7R do not intersect with the blowing direction of the air conditioning air blown from the front end side (air conditioning air outlet) of the air path 51.

According to the above-described embodiment, the output direction of each speaker sound and the front end side of the air path 51 (air-conditioning air outlet) until the speaker sounds of the left speaker 7L and the right speaker 7R reach the driver's seat 3. ) Does not intersect with the air-conditioning air blown out. Therefore, the speaker sounds of the left speaker 7L and the right speaker 7R are not disturbed by the air-conditioning wind, and it is possible to provide the operator with a clear speaker sound.

In particular, in the above-described embodiment, the front end side (air-conditioning air outlet) of the air path 51 is arranged at a position where the air-conditioning air blowing direction extends toward the vicinity of the back of the operator's head. Further, the left speaker 7L and the right speaker 7R are arranged so that the output direction of each speaker sound extends toward the operator's left ear and the vicinity of the right ear. Therefore, it is possible to provide the operator with clear speaker sound while more reliably delivering the conditioned air to the operator.

Further, according to the above-described embodiment, since the housing 5 is installed behind the driver's seat 3, even in a cab for a mini excavator having a relatively narrow interior space, the speaker and the air conditioning outlet are located at the rear of the cab. It is possible to add it. In short, if the housing 5 is used, both the speaker and the air conditioning outlet can be installed at the rear of the cab without being limited by the cab width.

Further, according to the above-described embodiment, the fastening holes 531H and 532H are formed in the vicinity of the left side speaker 7L which is also a vibration source, and the fastening holes 533H and 534H are formed in the vicinity of the right side speaker 7R which is also a vibration source. .. Therefore, it is possible to suppress the vibration of the housing 5 itself and the vibration transmission to the cab 1 to which the housing 5 is attached.

Further, according to the above-described embodiment, the cross-sectional shape of the air path 51 is a substantially rectangular shape along the outer shape of the housing 5. Therefore, the cross-sectional area of the air path 51 can be made larger, and as a result, the flow rate of the conditioned air can be increased.

Further, according to the above-described embodiment, the housing 5 is equipped with a net-like cover 8 that covers the entire front area. That is, the front surface of the left side speaker 7L and the right side speaker 7R and the front end side (air conditioning air outlet) of the air path 51 are integrally covered by the common cover 8. Therefore, it is possible to standardize the parts to reduce the cost, give the viewer a sense of unity, and have an excellent design.

In particular, in the above-described embodiment, the gap between the nets of the cover 8 is formed so as to prevent the human fingertips from passing through. Therefore, while delivering the speaker sound and the air-conditioning wind to the room, the diaphragms (cone paper) 70L and 70R of the left speaker 7L and the right speaker 7R are protected, and the invasion of foreign matter (pests, etc.) into the air path 51 is reduced. It is possible.

Further, according to the above-described embodiment, the housing 5 is attached so as to fit into a recess (not shown) formed inside the rear surface of the cab 1. Further, the horizontal length of the cover 8 is longer than the horizontal length of the housing 5, and the vertical length of the cover 8 is longer than the vertical length of the housing 5. Further, the thickness of the cover 8 in the front-rear direction is thinner than the thickness of the housing 5 in the front-rear direction. Therefore, it is possible to minimize the protrusion of the housing 5 including the cover 8 from the rear surface of the cab 1 (the fastening destination of the housing 5).

Further, according to the above-described embodiment, a sheet-shaped sound absorbing material 510 for absorbing the air blowing sound accompanying the air conditioning air from the air conditioning duct is attached to the inside of the air path 51. Therefore, it is possible to reduce the volume of the air conditioning sound blown out from the air outlet.

<2. Modification example>
The interior structure of the cab of the construction machine according to the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made within the scope of the claims.

In the above-described embodiment, the case where the cross-sectional shape of the air path 51 has a substantially rectangular shape along the outer shape of the housing 5 is illustrated, but the present invention is not limited to this. For example, as shown in FIG. 8, the cross-sectional shape of the air path 51 may be configured to have an elliptical shape elongated in the vertical direction.

Further, in the above-described embodiment, the case where one air path 51 is formed in the housing 5 has been illustrated, but the present invention is not limited to this. For example, as shown in FIG. 9, substantially rectangular air passages 51A and 51B elongated in the vertical direction may be formed side by side, and as shown in FIG. The rectangular air paths 51A and 51B may be formed side by side. In the modified examples shown in FIGS. 9 and 10, one of the air paths 51A and 51B is composed of the above-mentioned net-shaped cover, and the other is a louver (specifically, a louver whose air conditioning air direction can be adjusted in the vertical direction). ) May be used. According to this, the air conditioning air from one air conditioning path (the side where the mesh-shaped cover is provided) is provided to the operator seated in the driver's seat to cool the operator, and the other air conditioning path (louver is provided). It is possible to provide air conditioning air from the side) to the cab ceiling to suppress heat radiation from the cab ceiling.

Alternatively, as shown in FIG. 11, two housings 5A and 5B are arranged side by side, the left side housing 5A is provided with the left side speaker 7L and the air path 51A, and the right side housing 5B is provided with the right side speaker 7R and. The air path 51B may be provided.

Further, in the above-described embodiment, the case where the housing 5 is configured as a substantially rectangular parallelepiped member elongated in the left-right direction is illustrated, but the present invention is not limited to this. For example, as shown in FIG. 12, the housing 5 may be configured as a member having an elliptical front view. In that case, at least a part (upper surface and lower surface) of the cross-sectional shape of the air path 51 may be configured to have a curved shape along the outer shape of the housing 5.

Further, in the above-described embodiment, the case where the air outlet (the front end side of the air path 51), the left side speaker 7L, and the right side speaker 7R are provided in one housing 5 is illustrated, but the present invention is not limited to this. For example, as shown in FIG. 13, the air outlet, the left side speaker, and the right side speaker may be provided in different housings. Even in such a modified example, the individual housings are arranged so that the output directions of the sound of each speaker of the left and right speakers and the air-conditioning air blown from the air outlet do not intersect.

Further, in the above-described embodiment, as shown in FIG. 5, the case where the shape of the net is the same in all the regions of the cover 8 is illustrated, but the present invention is not limited to this. For example, the left and right speaker areas LA and RA and the air outlet area CA may be configured so that the shape of the net is different.

In particular, in the air outlet area CA, a louver that can adjust the direction of the air conditioning air in the vertical direction may be provided instead of the shape of the net.

Further, in the above-described embodiment, the case where the housing 5 is fixed to the recess (not shown) formed inside the rear surface of the cab 1 has been illustrated, but the present invention is not limited to this. For example, rotation shafts may be provided on the left and right side surfaces of the housing 5, and the housing 5 may be rotatably attached in the vertical direction so that at least the vertical angle of the front surface of the housing 5 can be adjusted.

Further, in the above-described embodiment, the case where the housing 5 is bolted to the cab 1 via a plurality of fastening holes 531H to 534H has been illustrated, but the present invention is not limited to this. For example, the housing 5 may be provided with a plurality of claws, and the housing 5 may be fixed to the cab 1 by fitting the plurality of claws into the plurality of receiving portions provided in the cab 1.

As described above, the indoor structure of the cab of the construction machine according to the present invention is suitable for a hydraulic excavator or the like in which an air-conditioning air outlet and a speaker are provided in the cab.

1 cab, 3 driver's seat, 5 chassis, 5A, 5B chassis, 7L left speaker,
7R right speaker, 8 covers, 51 air paths, 51A, 51B air paths,
70L diaphragm, 70R diaphragm, 510 sound absorbing material, 513H to 534H fastening hole,
CA outlet area, LA left speaker area, RA right speaker area

Claims (7)

The interior structure of the cab of construction machinery
Behind the driver's seat, the left speaker and the right speaker are arranged at intervals in the left-right direction.
An air outlet that blows air conditioning air into the room is arranged between the left speaker and the right speaker.
The left side speaker and the right side speaker are fixed so that their diaphragms face forward.
The left side speaker, the right side speaker, and the air outlet are arranged so that the output direction of each speaker sound and the blowing direction of the air conditioning air do not intersect until each speaker sound reaches the driver's seat. The interior structure of the cab of construction machinery is characterized by that. A housing is installed behind the driver's seat.
The housing includes a left speaker area where the left speaker is arranged, a right speaker area where the right speaker is arranged, and an outlet area where the outlet is arranged between the left speaker area and the right speaker area. Provided,
In the left speaker area, the left speaker is fixed so that the diaphragm of the left speaker faces forward.
In the right side speaker area, the right side speaker is fixed so that the diaphragm of the right side speaker faces forward.
An air passage that penetrates the front-rear direction of the housing is formed in the air outlet area.
The interior structure of a cab of a construction machine according to claim 1, wherein the front end portion of the air path functions as the air outlet and an air conditioning duct is connected to the rear end portion. The housing is provided with a plurality of fixed portions in the vicinity of the left speaker and in the vicinity of the right speaker.
The interior of the cab of a construction machine according to claim 2, wherein the housing is attached to the cab by fixing the plurality of fixed portions to the plurality of fixed portions provided in the cab. Construction. The interior structure of a cab of a construction machine according to claim 2 or 3, wherein at least a part of the cross-sectional shape of the air path has a shape along at least a part of the outer shape of the housing. The interior structure of a cab of a construction machine according to any one of claims 2 to 4, wherein a net-like cover covering the entire front surface of the housing is attached to the housing. The interior structure of a cab of a construction machine according to any one of claims 1 to 5, wherein a sound absorbing material is provided on the inner surface of the air passage. The air outlet is arranged at a position where the air-conditioning air blowing direction extends linearly toward the vicinity of the back of the head of the operator seated in the driver's seat.
The left speaker is arranged so that the output direction of the output speaker sound extends linearly toward the vicinity of the operator's left ear.
The construction according to any one of claims 1 to 6, wherein the right side speaker is arranged so that the output direction of the output speaker sound extends linearly toward the vicinity of the right ear of the operator. The interior structure of the machine cab.

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