JP2010052677A - Defroster - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a defroster having sufficient defrosting effect with simple structure. <P>SOLUTION: The defroster is mounted on a working vehicle provided with an opening and closing plate 21 for opening and closing an air feed path and a manual operation means for opening and closing the opening and closing plate 21 in an air duct 22. One end of the opening and closing plate 21 is fixed to a rotational shaft 24 pivoted on the air duct 22. One end of the rotational shaft 24 is connected to an operation lever part 24a which is an operating means and protrudes outside of the air duct 22. A holding means for holding the opening and closing plate 21 to an opening position and a closing position is provided between the operation lever part 24a and the air duct 22. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a defroster for a work vehicle equipped with a cabin.

  Conventionally, a work vehicle such as a wheel loader has a cabin specification in which the periphery of a driver's seat is stretched with glass, and the work vehicle is equipped with an air conditioning device in the cabin in order to improve a worker's working environment. The

  In winter and cold regions, the windshield of the cabin is cooled by outside air, and the air around the inside of the windshield is cooled. When the air contains a lot of moisture, the cooled air is saturated and water droplets adhere to the inside of the windshield. For this reason, the worker's field of view is narrowed, and the operation of the work vehicle is hindered.

  In order to solve the above-mentioned problems, for example, a method of defrosting water droplets adhering to the inside of the windshield by directly applying air-conditioning air such as dry air, hot air, or cold air generated by an air conditioner as described below has been proposed. ing.

In Patent Document 1, a mechanism that opens and closes an opening / closing plate by a damper or the like is provided in a blower duct extending from an air conditioner, and the windshield is defrosted by applying conditioned air.
Regarding Patent Document 2, the windshield defrosting is performed by adjusting the wind direction of the discharge port of the air conditioner provided near the front panel to apply air-conditioned air.
JP 2000-168342 A JP 2005-119535 A

  However, in patent document 1, since the control means of the opening / closing device of the defroster is incorporated in the control panel, the control system becomes complicated and requires a great deal of cost. In addition, because the opening and closing plate of the remote duct is operated, there is a need for sufficient space for the mechanism to be built in, and the defroster can not be freely placed. As a result, the defroster should be placed at a position where the defrost function cannot be fully demonstrated. was there.

  Further, in Patent Document 2, since the duct built in the steering panel and the front window defrost are used together, a complicated control system and mechanism are not required, and low cost and space saving can be achieved. The placement of the defroster was not enough, so the defroster's ability was insufficient. There is also a problem that the defroster and the air conditioner cannot be used at the same time because they are shared.

  Accordingly, an object of the present invention is to provide a defroster having a simple structure and a sufficient defrost effect.

  The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.

  That is, according to the first aspect of the present invention, the air conditioner is mounted on a work vehicle including a driver's seat, a steering handle, a cabin that covers the driver's seat and the steering handle, and an air adjusting device that adjusts air in the cabin. A blower hose extending from the apparatus, a discharge part that is arranged in front of the steering handle and discharges the adjusted air, and a blower duct interposed between the blower hose and the discharge part, A defroster that discharges air adjusted by an air adjusting device to the inside of the front glass of the cabin, and is provided with an open / close plate that opens and closes the air passage in the air duct and a manual operation means that opens and closes the open / close plate. Is.

  According to claim 2, one end of the opening and closing plate is fixed to a rotating shaft pivotally supported by the air duct, and one end of the rotating shaft projects outward from the air duct and serves as a manual operation means. And holding means for holding the opening / closing plate in the open position and the closed position is provided between the operation lever portion and the air duct.

  In one embodiment of the present invention, one end of the opening / closing plate is fixed to a rotating shaft that is rotatably supported by the air duct, and a side surface of the air duct has an arc-shaped long hole centered on the rotating shaft. Is provided with fastening means that also penetrates the elongated hole and fastens and fixes the opening and closing plate and the air duct to the side of the other end of the opening and closing plate and also serves as an operating means.

As effects of the present invention, the following effects can be obtained.
According to the present invention, the defroster opening / closing device having a simple structure can be realized, and a defrost having sufficient capacity can be realized at low cost and in a small space. Then, the opening / closing plate can be opened / closed by the manual operation means to easily act as defrost or to stop blowing.
Since the defroster opening / closing device having a simple structure can be realized, it can be easily held in the opening / closing plate open position and the closed position.
Since the defroster opening / closing device having a simple structure can be realized, the opening / closing plate can be fixed at an arbitrary position, and the air flow rate can be adjusted. It is also possible to blow air toward the direction, which widens the air blowing range of the defroster.

Next, an embodiment of the present invention when mounted on a work vehicle will be described.
1 is an overall side view of a work vehicle equipped with the defroster of the present invention, FIG. 2 is a side view of a cabin of the work vehicle equipped with the defroster of the present invention, and FIG. 3A is a left front view of the defroster of the present invention. FIG. 4 is a side view of the defroster according to the present invention when closed, FIG. 4 is a view when opened, and FIG. 5 is a left front view of a defroster according to another embodiment. 6A is a side view of a defroster according to another embodiment, and FIG. 6B is a view when the defroster is closed, and FIG. 6B is a view when the defroster is opened.

First, the whole structure of the wheel loader 1 to which the defroster of the present invention is attached will be described.
As shown in FIG. 1, the wheel loader 1 is an articulated type in which a front frame 2 and a rear frame 4 are bendable. The front frame 2 is provided with a working device 3, and the rear frame 4 includes an engine 5, a cabin 6, and the like. Is provided.

  As shown in FIG. 2, the cabin 6 includes an air conditioner (indoor unit) 7, a steering handle 8, a driver's seat 9, a steering column 10, a steering shaft 11, a work operation panel 12, a work operation pedal 13, a distribution box 14, and a work operation. The lever 16 and the defroster discharge part 20 are provided.

  The four directions of the driver's seat 9 are covered with a cabin 6, a steering column 10 is disposed to protrude obliquely upward from the rear frame 4 in front of the driver's seat, and a work operation panel 12 is provided at the upper end of the steering column 10. Yes. A steering shaft 11 protrudes from the steering column 10 and a steering handle 8 is provided at the upper end thereof. A work operation pedal 13 is disposed below the steering column 10.

A distribution box 14 and an air conditioner 7 are disposed below the driver's seat 9, and the air conditioner 7 includes an evaporator, a receiver, a blower, a heater unit, and the like (not shown). A distribution box 14 is connected to the air conditioning device 7, and a plurality of blower hoses 17, 17... Are connected to the distribution box 14, and the other end of the blower hoses 17, 17. The discharge parts 15 and 15 and the defroster discharge part 20 are connected. The air-conditioning discharge sections 15 and 15 are arranged on both the left and right sides of the steering column 10 and are attached to the frame constituting the cabin, and the adjusted air is discharged toward the operator seated on the driver's seat 9.
The defroster discharge portion 20 is fixed to the front panel 19 at the lower part of the front window, in front of the steering handle 8, and the adjusted air is discharged from below to above on the inner surface of the front window.
Thus, the conditioned air adjusted by the air conditioner 7 is distributed by the distribution box 14 and is sent to the air-conditioning discharge sections 15 and 15 and the defroster discharge section 20 through the blower hoses 17, 17.

  The blower hose 17 passes above the rear frame 4 and below the floor mat (not shown) so as not to obstruct the operation of the wheel loader 1 from the distribution box 14 and to impair the aesthetics. It protrudes upward from the inner wall of the air-conditioner and is connected to the air-conditioning discharge sections 15 and 15 and the defroster discharge section 20.

  The defroster includes an air conditioning device 7, a distribution box 14, a blower hose 17, a defroster discharge part 20, and the like. A blower duct 22 is disposed between the blower hose 17 and the defroster discharge part 20, and opens and closes to the blower duct 22. The plate 21 and the operation lever part 24a are provided. In this embodiment, the defroster discharge section 20 and the air duct 22 are integrally formed. However, the defroster discharge section 20 and the air duct 22 can be separately configured, and are arranged in the middle of the air hose 17 in which the air duct 22 is easily operated. It can also be set as the structure to install.

A first embodiment of the air duct 22 will be described.
As shown in FIG. 3 and FIG. 4, the air duct 22 has a substantially box shape and is open at the top and front, and has a structure in which a communication hole is opened on the lower surface to connect the air hose 17. That is, the blower duct 22 has an opening for fitting the blower hose 17 on the bottom surface, the top surface is open, and is connected to the defroster discharge unit 20 by welding or the like. The front surface is open, has a fixing portion 22b for fixing to the front panel 19, and is fixed using a bolt nut 22c or the like. In this way, a ventilation path is formed in the up-down direction.
A rotating shaft 24 is pivotally supported in the front lower part or rear lower part of the air duct 22 so as to be rotatable in the left-right direction, and one end of the opening / closing plate 21 is fixed on the rotating shaft 24 in the air duct 22 by welding or the like. Yes. The opening / closing plate 21 is formed in a quadrangular shape, and the size of the opening / closing plate 21 is configured by a plate material having a size capable of sufficiently closing the opening provided on the lower surface of the air duct 22. One end of the rotating shaft 24 protrudes from the side surface of the air duct 22 and serves as an operation lever portion 24a. The operation lever portion 24a is formed by bending one end, but a grip or the like may be provided. In this way, manual operation means is configured outside the air duct 22.

  In addition, the air duct 22 and the rotating shaft 24 are provided with holding means for holding the opening / closing plate 21 in the open position and the closed position so that the air passage can be opened and closed by the opening / closing plate 21. That is, a spring 24b is wound around the outer periphery of the rotating shaft 24 between the opening / closing plate 21 on the operation lever portion 24a side and the inner surface of the air duct 22 and rotates on the rotating shaft 24 outside the air duct 22. A protrusion 24c is provided to prevent this, and a fan-shaped holding plate 22a having an appropriate thickness is fixed on the outer surface of the air duct 22. Thus, the protrusion 24c provided on the rotating shaft 24 is pressed against the side surface of the air duct 22 by the urging force of the spring 24b, so that the protrusion 24c can be hooked on both sides of the holding plate 22a. It can be held in an open position rotated in the direction) and a closed position rotated in the lower direction (horizontal direction). However, the holding structure of the opening / closing plate 21 is not limited to the above-described structure, and can be held at a plurality of locations by forming serrated irregularities on the surface of the holding plate 22a. Further, the protrusion 24c is bent in an L shape, and holes for inserting the tip of the protrusion 24c on the outer surface of the air duct 22 are held at a plurality of locations by appropriately spacing on a concentric circle with the rotation shaft 24 as the center. It can also be configured. It is also possible to adopt a configuration in which the protruding portion 24 c and the holding plate 22 a are arranged in the air duct 22.

  A blower guide 23 is integrally formed on the upper portion of the blower duct 22, and the blower guide 23 has a substantially inverted trapezoidal shape when viewed from the front and a triangular shape when viewed from the side, and is disposed along the inclination of the windshield 18. The The surface constituted by the short side of the lower part of the blower guide 23 is connected to the upper surface of the blower duct 22 so that conditioned air can be taken in. The upper surface constituted by the long side of the upper part of the blower guide 23 is opened and serves as a discharge port 23a so as to spread on both the upper and left and right sides to discharge the conditioned air. A long hole-like opening 23b is provided on the side surface of the blow guide 23 so as to discharge air-conditioned air to the side, and the range of defrost can be expanded.

  In the embodiment of the present invention configured as described above, an operator sits in the driver's seat 9 of the wheel loader 1 and uses the steering handle 8, the work operation panel 12, the work operation pedal 13, the work operation lever 16, etc. 1 movement, operation of the working device 3 and the like.

  When defrosting of the windshield 18 is required, the projecting portion 24c avoids the holding plate 22a and rotates the rotating shaft 24 clockwise while pulling the operation lever portion 24a to the side. Since the opening / closing plate 21 rotates in conjunction with the rotation of the rotation shaft 24, the closed air duct 22 is opened. Then, when the operation lever portion 24a pulled out with the air duct 22 opened is released, the projecting portion 24c of the rotating shaft 24 is locked to the end of the holding plate 22a by the urging force of the spring 24b, and the opening / closing plate 21 is moved. The air-conditioning air from the air conditioner 7 is applied to the inner surface of the windshield 18 through the blower hose 17 and the blower duct 22 to perform defrosting.

  When defrosting of the windshield 18 is unnecessary, the winder 18 is rotated counterclockwise while the operation lever portion 24a is pulled. The opening / closing plate 21 rotates downward in conjunction with the rotation of the operation lever portion 24a, and the closing portion of the air duct 22 is closed. When the operation lever portion 24a is released, the protruding portion 24c is locked to the holding plate 22a by the urging force of the spring 24b. Thereby, the ventilation duct 22 is closed and defrosting is not performed.

  Next, a second embodiment of the air duct 22 will be described. In addition, the same code | symbol is attached | subjected to the part which is common in the said embodiment, and the description is abbreviate | omitted.

  As shown in FIGS. 5 and 6, one end of the opening / closing plate 21 is pivotally supported by a hinge 25 at the front lower part or the rear lower part of the air duct 22. Alternatively, it is pivotally supported by a rotating shaft, and one end of the opening / closing plate 21 is fixed on the rotating shaft in the air duct 22 by welding or the like. On both side surfaces of the air duct 22, the hinge 25 or arc-shaped long holes 22d and 22d centering on the rotating shaft are opened. Fixing nuts 21 a and 21 a are fixed to both sides of the other end of the opening / closing plate 21 by welding or the like, and the operation bolts 22 e and 22 e are passed through the long holes 22 d and 22 d from the outside of the air duct 22 and tightened. Thus, the opening / closing plate 21 can be fixed.

  Thus, when defrosting of the windshield 18 is necessary, the operation bolts 22e and 22e of the defroster are loosened and slid along the long holes 22d and 22d of the air duct 22, and the operation bolt is in a position where the opening and closing plate 21 is sufficiently opened. The opening / closing plate 21 is fixed by tightening 22e and 22e. When the air conditioner 7 is set to air blowing, the conditioned air spreads through the windshield 18 and the defroster discharge part 20 to the windshield 18 and defrosts.

  In addition, when the air duct 22 is opened as described above, the conditioned air is blown out from the long holes 22d and 22d of the air duct 22, so that the defrost air can be blown over a wide range.

  When defrosting of the windshield 18 is not required, the operation bolts 22e and 22e of the defroster are loosened, the opening and closing plate 21 is slid along the guides of the long holes 22d and 22d of the air duct 22, and the opening and closing plate is moved. The operating bolts 22e and 22e are tightened at a position where the valve 21 is sufficiently closed to fix the opening / closing plate 21. Regardless of the air blowing setting of the air conditioner 7, the wind duct 22 is closed, so that the windshield 18 is not defrosted.

  Further, the opening / closing plate 21 of the defroster can be fixed at an arbitrary position, and the strength of the defrost can be adjusted by the opening / closing degree of the opening / closing plate 21.

  Further, the fixing nuts 21a and 21a of the opening and closing plate 21 may be arranged as fixing bolts so as to protrude into the long holes 22d and 22d of the blower duct 22, and the fixing member of the opening and closing plate may be an operation nut.

  As described above, the vehicle is mounted on a work vehicle including the driver's seat 9, the steering handle 8, the cabin 6 that covers the driver's seat 9 and the steering handle 8, and the air adjusting device 7 that adjusts the air in the cabin 6. A blower hose 17 extending from the air conditioner 7, a discharge part disposed in front of the steering handle 8 and discharging adjusted air, and interposed between the blower hose 17 and the discharge part. A defroster that discharges the air adjusted by the air adjusting device 7 to the inside of the front glass of the cabin 6, and an opening / closing plate 21 that opens and closes the air passage in the air duct 22. Since a manual operation means for opening and closing the opening / closing plate 21 is provided, a defroster opening / closing device with a simple structure can be realized, and a sufficient capacity can be realized at low cost and in a small space. Made to defrost. Then, the opening / closing plate 21 is opened / closed by manual operation means, so that it can easily act as defrost or stop blowing.

  One end of the opening / closing plate 21 is fixed to a rotating shaft 24 pivotally supported on the air duct 22, and one end of the rotating shaft 24 projects outward from the air duct 22 and is connected to an operation lever portion 24 a serving as a manual operation means. Since the holding means for holding the opening / closing plate 21 in the open position and the closed position is provided between the operation lever portion 24a and the air duct 22, a defroster opening / closing device with a simple structure can be realized, It can be easily held in the open / close plate open position and the closed position.

  One end of the opening / closing plate 21 is fixed to a rotating shaft 24 pivotally supported by the air duct 22, and an arc-shaped long hole centering on the rotating shaft 24 is formed on a side surface of the air duct 22. Opening is provided on the other side of the opening / closing plate 21 with fastening means that penetrates the elongated hole and fastens and fixes the opening / closing plate 21 and the air duct 22 and also serves as operating means. Therefore, a defroster opening / closing device with a simple structure can be realized, the opening / closing plate 21 can be fixed at an arbitrary position, the air flow rate can be adjusted, and air can be blown to the side from the long hole at the open position. It becomes possible, and the air blowing range of the defroster is widened.

1 is an overall side view of a work vehicle equipped with a defroster according to the present invention. The cabin side view of the work vehicle equipped with the defroster of the present invention. (A) The left front view in the figure of the defroster of this invention. (B) Right front view. (A) The figure at the time of closing with the defroster side view of this invention. (B) Similarly, when opened. The left front view of the defroster of another Example. (A) The figure at the time of closing with the defroster side view of another Example. (B) Similarly, when opened.

Explanation of symbols

20 Defroster discharge part 21 Opening and closing plate 22 Air duct 22a Holding plate 24a Operation lever part 24b Spring 24c Protruding part

Claims (3)

  A blower hose mounted on a work vehicle having a driver's seat, a steering handle, a cabin covering the driver's seat and the steering handle, and an air adjusting device for adjusting the air in the cabin, and extending from the air adjusting device And a discharge part that is disposed in front of the steering handle and discharges the adjusted air, and a blower duct interposed between the blower hose and the discharge part, and the air adjusted by the air conditioner A defroster for discharging to the inside of the front glass of the cabin, wherein the air duct is provided with an opening / closing plate for opening and closing the air passage and manual operation means for opening and closing the opening and closing plate.   One end of the opening / closing plate is fixed to a rotating shaft that is rotatably supported by the air duct, and one end of the rotating shaft protrudes outward from the air duct and is connected to an operation lever portion serving as a manual operation means. The defroster according to claim 1, wherein holding means for holding the opening / closing plate in an open position and a closed position is provided between the operation lever portion and the air duct.   One end of the opening / closing plate is fixed to a rotating shaft pivotally supported by the air duct, and an arc-shaped long hole centering on the rotating shaft is opened on a side surface of the air duct. 2. The defroster according to claim 1, further comprising: a fastening unit that penetrates the elongated hole and fastens and fixes the opening and closing plate and the air duct to the side of the other end of the plate and also serves as an operation unit. .

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