JP2016130430A - Skylight device for cab - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a skylight device for a cab that enables adjustment of skylight opening, without installing a small window part.SOLUTION: A skylight device for a cab includes: a canopy 8 installed to open/close an opening 7 formed on a ceiling 6; a second slide rail 10 having a revolving shaft 13 disposed on an edge side of the canopy 8, for supporting the revolving shaft 13 slidably along the ceiling 6; a first slide rail 9 having a pin 12 disposed at the other edge side of the canopy 8, for supporting the pin 12 to enable the pin to be detached in a vicinity of an edge part of the second slide rail 10, at the same time supporting the pin slidably along the ceiling 6; a support shaft 19a disposed on a rear side of the first slide rail 9, on a part of the ceiling 6 in front of a rear edge of the second slide rail 10; a cylinder 11 connecting the pin 12 and the support shaft 19a in a way that allows extension/contraction; and a recess 14 disposed on the first slide rail 9, for retaining the pin 12 at a plurality of pre-set locations in the slide direction.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a cab skylight device, and more particularly to a cab skylight device that can be opened and closed on a ceiling of a cab of a construction machine such as a hydraulic excavator or a work machine.

  A cab such as a construction machine is provided with a skylight mainly for ventilation. A typical skylight is composed of a ceiling having a large opening, a canopy that covers the opening, and a hinge mechanism that supports the canopy so that it can be opened and closed. By opening the canopy, a large opening is obtained at the top of the cab. be able to. However, the openable / closable state of the skylight that can be held is generally only fully open and fully closed, and the size of the opening cannot be adjusted. Therefore, even when it is light rain, if it is in the fully open state, rain will enter the cab from the large opening. However, in such a situation, it is only necessary to open the skylight a little to encourage ventilation and to allow air in and out of the cab through the small opening.

  Therefore, as a technique capable of coping with such a situation, for example, the invention described in Patent Document 1 is known. In this known technique, a small window part that can be opened and closed is provided in the skylight, and by opening and closing this small window part, it is possible to obtain a small opening part in the ceiling part, and ventilation in the cab is made through this opening part. It can be done or encourage ventilation in the cab.

JP 2000-198357 A

  However, since the known technique disclosed in Patent Document 1 has a configuration in which a new small window is added to the conventional skylight, the number of steps and the manufacturing cost of the skylight are greatly increased. Or the aesthetics in a cab will be impaired by the increase in the lock release apparatus for small windows in a cab. In addition, it is divided into small windows and skylights, and the opening angle of the small windows is set small, so that the opening of the small window or skylight is adjusted to obtain the desired ventilation and provide a comfortable working environment Is difficult. These problems are caused by adjusting the ventilation amount by providing a small window portion in the skylight.

  Therefore, an object of the present invention is to provide a cab skylight device that allows the opening degree of the skylight to be adjusted without providing a small window portion.

  In order to solve the above-described problems, the present invention provides a canopy provided so that an opening formed in a ceiling of a cab can be opened and closed, and a first support shaft is provided on one end side of the canopy, and the first support is provided. A first support member that slidably supports the shaft along the ceiling, and a second support shaft is provided on the other end side of the canopy, and the second support shaft is provided on the first support member side. A second support member that is detachable in the vicinity of the end portion and slidably supported along the ceiling; and a rear side of the second support member and a rear end of the first support member A third support shaft provided on the ceiling on the front side, a connecting member for connecting the second support shaft and the third support shaft in an extendable manner, and a second support member provided on the second support member; Characterized by a cab skylight device comprising: a holding portion that holds the support shaft at a plurality of preset positions in the sliding direction. That.

  In the present invention configured as described above, when the opening portion is in the half-open state, the second support shaft is arranged so that the second support shaft is held by any one of the plurality of holding portions from the fully closed state. While retracting along the 2nd support member, a 1st spindle is retracted along the 1st support member, and a canopy is moved back. Thereby, an opening part can be made into a half open state by desired opening degree.

  Also, in the present invention, the first and second support members are each provided in parallel with each other, the second support member is on both sides in the left-right direction of the opening, and the first support member is the Since it is arrange | positioned at the back side of an opening part, an opening / closing apparatus can be easily performed only by slidingly moving in the front-back direction.

  In the present invention, when the canopy is in the fully closed state, the second support shaft is held by the holding portion closest to the front side of the opening, so that the canopy is locked when the canopy is closed. The canopy can be fixed in a closed state only by a mechanism for opening and closing.

  In the present invention, when the canopy is in a fully open state, the first support shaft is located at a position farthest from the opening of the first holding member, and the second support shaft is the second support shaft. Since the canopy is separated from the vicinity of the end portion of the support member, the canopy rotates around the first support shaft and is constrained by the connecting member supported by the third support shaft, When the portion is fully opened, the second support shaft is pulled out from the vicinity of the end of the second support member to release the support relationship between them, and the first support shaft is positioned at the rearmost position of the first support member. In this state, the canopy (the second spindle side: the front side) is rotated upward about the first spindle. Thereby, an opening part can be made into a full open state.

  Further, when the opening is fully closed, the canopy is rotated downward, the second support shaft is inserted from the vicinity of the end of the second support member, and the forefront of the plurality of holding portions The canopy is closed by sliding so that the second support shaft is held by the holding portion located at the position. In this state, as described above, the canopy is held in the fully closed state at the foremost position, and the state is locked.

  That is, according to the present invention, the opening can be opened halfway by moving the canopy rearward through the second support member and the first support member, so that the skylight can be opened without providing a small window. The degree adjustment can be performed in multiple stages. Further, the canopy can be held in the fully open position by detaching the second support shaft from the second support member.

  The holding portion is a recess formed in a lower side of a long hole formed in the second support member, and the second support shaft is fitted and held therein, and the second support shaft is the long Since it can slide along the upper side of the hole, a single long hole can be used to provide a slide movement function (opening function) and a canopy position holding function.

  Furthermore, since a cover for preventing rain is provided on the open end side of the canopy of the opening, it is possible to prevent rain from falling from the opening even if it rains up to a predetermined opening degree. It becomes possible, and the working environment of the worker can be improved.

  In the embodiment described later, the ceiling is denoted by reference numeral 6, the opening is denoted by the ceiling opening 7, the canopy is denoted by numeral 8, the first support shaft is defined by the rotary shaft 13, and the first support member is defined by the second slide rail. 10, the second support shaft is the pin 12, the second support member is the first slide rail 9, the third support shaft is the support shaft 19 a, the connection member is the cylinder 11, and the holding portion is the recess 14. The slot corresponds to the reference numeral 15, and the cover corresponds to the reference numeral 18.

  According to the present invention, the opening degree of the skylight can be adjusted without providing a small window portion.

It is a side view of the hydraulic excavator which shows an example of the construction machine with which one Embodiment of the skylight which concerns on this invention is provided. It is a perspective view of the cab shown in FIG. It is a top view of the cab shown in FIG. It is a perspective view which shows the skylight which concerns on this embodiment. It is a perspective view which shows the 1st slide rail with which this embodiment is equipped. It is a perspective view which shows the slide mechanism of the canopy with which this embodiment is equipped. It is a figure which shows operation | movement of this embodiment, and is a side view which shows the state by which the ceiling opening part was closed by the canopy. It is a figure which shows operation | movement of this embodiment, and is a side view which shows the state which unlocked the canopy from the state shown in FIG. It is a figure which shows operation | movement of this embodiment, and is a side view which moved the canopy back from the state shown in FIG. 8, and made the ceiling opening part the half-open state. It is a perspective view in the state shown in FIG. It is a top view in the state shown in FIG. It is a figure which shows operation | movement of this embodiment, and is a side view which shows the state which moved the canopy back until the pin provided in the canopy remove | deviated from the 1st slide rail. It is a figure which shows operation | movement of this embodiment, and is a side view which shows the state which rotated the canopy in the state shown in FIG. It is a side view which shows the state by which the ceiling opening part was fully opened after rotation of the canopy. It is a perspective view in the state shown in FIG. It is a top view in the state shown in FIG. It is a side view which shows another embodiment of the skylight in this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 is a side view of a hydraulic excavator as a construction machine having a skylight according to an embodiment of the present invention, FIG. 2 is a perspective view of the cab shown in FIG. 1, and FIG. 3 is a plan view of the cap shown in FIG.

  The hydraulic excavator SV according to the present embodiment basically includes a traveling body 1, a revolving body 2, and a work device 3. The revolving unit 2 is provided on the traveling unit 1 so as to be capable of revolving, and the revolving unit 2 is provided with a cab 4. The work device 3 includes an arm 3a, a boom 3b, and a bucket 3c, and is provided in front of the swivel body (vehicle body) 2. As shown in FIGS. 2 and 3, a skylight 5 is provided at the top of the cab 4, and a front window 4a is provided at the front. Hereinafter, the side on which the front window is provided is referred to as a front side F, and the opposite side is referred to as a rear side R. The skylight 5 includes a ceiling 6 and a canopy 8, and the canopy 8 is provided so as to close or open a ceiling opening 7 formed in the ceiling 6. That is, the canopy 8 is provided so as to be openable and closable with respect to the ceiling opening 7.

  4 is a perspective view of a main part of the cab 4 with the canopy 8 opened, FIG. 5 is a perspective view of the first slide rail shown in FIG. 4, and FIG. 6 is a perspective view showing a sliding mechanism of the canopy 8 shown in FIG.

  As shown in FIG. 4, the skylight 5 includes a canopy 8 and a cylinder 11. The canopy 8 has a function of covering a part of the ceiling 6 of the cab 4 having the ceiling opening 7 and the ceiling opening 7. In this embodiment, the cylinder 11 has a damper action by air, and an expandable / contractible air cylinder is used. When the canopy 8 is opened at a desired opening, the cylinder 11 generates a force that maintains the opening state. . Further, when the canopy 8 is opened, an auxiliary force that rotates in the opening direction is generated. Further, when the canopy 8 is closed, the canopy 8 functions as a damper for buffering the moving speed when rotating in the closing direction.

  As a mechanism for maintaining the opening degree of the canopy 8, in this embodiment, a pin (second support shaft) 12, a pair of first slide rails 9 (second support members), and a pair of second slide rails 10 are used. (First support member) is provided. The pair of rails 9 and 10 are installed in parallel to each other. The pin 12 is provided on one of the canopy 8 and the cab 4, for example, on the front end side (the other end side) of the canopy 8. The first slide rail 9 is provided on the other of the canopy 8 and the cab 4, that is, the cab 4, and extends in the front-rear direction of the ceiling 6 of the cab 4. The first slide rail 9 is a long member that has a plurality of recesses (holding portions) 14 that can be held when the pin 12 can be engaged and disengaged at the locking position. The second slide rail 10 extends in the front-rear direction of the cab 4 and guides the rotating shaft 13 (first support shaft) provided on the rear end side (one end side) of the canopy 8 in the front-rear direction of the cab 4. It is a guide member. A rotary shaft 13 is loosely fitted on the second slide rail 10, and a slide groove 17 is formed to guide the rotary shaft 13 so as to be slidable. The second slide rails 10 are arranged on both left and right sides of the rear side R of the ceiling opening 7, and the first slide rails 9 are arranged on both sides of the ceiling opening 7 in the left and right direction.

  The plurality of concave portions (holding portions) 14 of the first slide rail 9 are formed in a shape that allows the pins 12 to be engaged and disengaged. That is, the 1st slide rail 9 is provided in each of the some recessed part 14, is formed along the front-back direction of the cab 4, and has the long hole 15 which can move the pin 12 so that a slide is possible. That is, the plurality of recesses 14 are formed on the lower side of the long hole 15, and the pin 12 is slidable along the upper side of the long hole 15. One end of the cylinder 11 is attached to the canopy 8 side via a pin 12, and the other end is attached to the ceiling 6 via a fixture 19 so as to be swingable by a support shaft 19a (third support shaft). The fixture 19 is provided on the ceiling on the rear side of the first slide rail 9 and on the front side of the rear end of the second slide rail 10, and the support shaft 19 a is rotatably supported by the fixed portion 19. Has been. Further, in the present embodiment, the fixtures 19 are respectively installed outside the second slide rail 10 in the longitudinal direction. A handle 8a for opening and closing the canopy 8 is provided on the inner surface of the canopy 8, so that an operator can operate it by hand.

  7 to 16 are diagrams showing the operation of this embodiment. 7 is a side view showing a state where the ceiling opening 7 is closed by the canopy 8, FIG. 8 is a side view showing a state where the canopy 8 is unlocked from the state shown in FIG. 7, and FIG. 9 is a state shown in FIG. FIG. 10 is a perspective view of the state shown in FIG. 9, and FIG. 11 is a plan view of the state shown in FIG.

  FIG. 12 is a side view of a principal part showing a state in which the canopy 8 is slid rearward until the pin 12 provided on the canopy 8 is detached from the first slide rail 9, and FIG. 14 is a side view showing a state in which the ceiling opening 7 is fully opened, FIG. 15 is a perspective view in the state shown in FIG. 14, and FIG. 16 is a plan view in the state shown in FIG. is there.

  In this embodiment configured as described above, the pin 12 is related to the concave portion 14a at the forefront of the first slide rail 9 (the position closest to the front side of the ceiling opening 7), which is the position close to the front edge of the ceiling opening 7. By stopping, the ceiling opening 7 is fully closed (FIG. 7). In addition, since it is possible to prevent the canopy 8 from moving unexpectedly due to vibration by the pressing force generated by the cylinder 11, in addition to the locking of the pin 12 in the foremost recess 14a of the first slide rail 9, A lock mechanism is not required. Thereby, the lock release apparatus in a cab can be simplified.

  When the canopy 8 is moved upward from the state in which the pin 12 is locked to the foremost recess 14a of the first slide rail 9 (FIG. 8), that is, the pin 12 is moved to the upper side of the elongated hole 15 of the first slide rail 9. , The pin 12 and the rotary shaft 13 of the canopy 8 can be moved in the front-rear direction (sliding direction) along the elongated hole 15 of the first slide rail 9 and the slide groove 17 of the second slide rail 10, respectively. It becomes a state. By moving the pin 12 to a recess 14 other than the foremost position and locking it (FIG. 9), the canopy 8 can be retracted and held at that position, and the ceiling opening 7 is in a half-open state (FIG. 10). , FIG. 11). At that time, the pressing force generated by the cylinder 11 can prevent the canopy 8 from moving unexpectedly due to vibration, so that the opening state of the ceiling opening 7 can be stably maintained.

  Further, when the canopy 8 is moved until the pin 12 is positioned at the opening end 16 formed in the vicinity of the rear end of the first slide rail 9 (FIG. 12), the pin 12 is detached from the first slide rail 9. Then, the rotating shaft 13 provided in the canopy 8 can be pivoted upward (FIG. 13). That is, the pin 12 is removably supported by the first slide rail 9 at the opening end 16 near the end on the second slide rail 10 side, and the pin 12 is detached from the first slide rail 9 according to the opening degree. Can do. Then, by turning the canopy 8 upward until the rear end of the canopy 8 interferes with the ceiling 6, the skylight opening 7 is fully opened (FIGS. 14, 15, and 16). At that time, the pressing force generated by the cylinder 11 acts in the direction of rotation of the canopy 8, so that the load on the operator for rotating the canopy 8 is reduced. Moreover, since the canopy 8 can be prevented from moving unexpectedly by vibration, the fully open state of the ceiling opening 7 can be stably maintained.

  When the canopy 8 is moved downward and the pin 12 is locked to the recess 14 of the first slide rail 9 through the opening end 16 of the first slide rail 9 when the ceiling opening 7 is fully open, the locked recess Depending on the position 14, the ceiling opening 7 is in a half-open state or a fully-closed state (FIGS. 7 and 9).

  According to the embodiment configured as described above, the opening degree of the skylight structure can be adjusted without providing a small window portion. Thereby, the man-hour and the manufacturing cost of the cab skylight device can be reduced. In addition, since it is not necessary to provide an unlocking device for small windows in the cab 4, the aesthetics in the cab 4 can be maintained.

  As shown in FIGS. 9 to 11, in this embodiment, it is possible to stably hold the skylight 5 with the skylight 5 being half open. For this reason, for example, even in the case of a rainy pattern, opening the canopy 8 a little and promoting ventilation makes the worker comfortable and improves the work efficiency. However, when it rains from the half-open skylight 5, unpleasantness increases and work efficiency is reduced.

  Therefore, as shown in the side view of the ceiling portion according to another embodiment of FIG. 17, the end portion 7a on the front side F of the ceiling opening 7 is located at a position that does not interfere with the canopy 8 when the canopy 8 rotates. It is also possible to provide a cover 18 that protects the end 7a from rain. All other parts are the same as those in the above-described embodiment.

  According to this other embodiment, the same effect as the above-described embodiment can be obtained, and in the half-open state of the skylight 5, the upper part of the ceiling opening 7 is covered with the cover 18 that prevents rain, so that rain or the like When rain falls, rainwater can be prevented from falling into the ceiling opening 7 even in this half-open state. On the other hand, the opening / closing operation of the canopy 8 is not hindered.

4 Cab 5 Skylight 6 Ceiling 7 Ceiling Opening 8 Canopy 9 First Slide Rail (Second Support Member)
10 Second slide rail (first support member)
11 Cylinder (connecting member)
12 pins (second spindle)
13 Rotating shaft (first support shaft)
14 Recessed part (holding part)
15 Long hole 16 Open end (near end)
18 Cover 19a Support shaft (third support shaft)
F front side R rear side

Claims (6)

A canopy provided in an opening formed in the ceiling of the cab so as to be openable and closable;
A first support member provided with a first support shaft on one end side of the canopy, and supporting the first support shaft slidably along the ceiling;
A second support shaft is provided on the other end side of the canopy, and the second support shaft is detachably supported in the vicinity of the end portion on the first support member side and is slidable along the ceiling. A second support member;
A third support shaft provided on the ceiling behind the second support member and in front of the rear end of the first support member;
A connecting member that connects the second support shaft and the third support shaft in an extendable manner;
A holding portion that is provided on the second support member and holds the second support shaft at a plurality of preset positions in a sliding direction;
Cab skylight device equipped with The cab skylight device according to claim 1,
The first and second support members are each provided in parallel in pairs,
The cab skylight device, wherein the second support member is disposed on both sides of the opening in the left-right direction, and the first support member is disposed on the rear side of the opening. The cab skylight device according to claim 1,
The cab skylight device, wherein when the canopy is in a fully closed state, the second support shaft is held by a holding portion closest to the front side of the opening. The cab skylight device according to claim 1,
When the canopy is fully open,
The first support shaft is located at a position farthest from the opening of the first support member;
The second support shaft is detached from the vicinity of the end portion of the second support member, the canopy rotates around the first support shaft, and the connecting member supported by the third support shaft A skylight device for a cab, which is located in a restrained position. The cab skylight device according to claim 1,
The holding portion is a recess formed on the lower side of the long hole formed in the second support member, and holds the second support shaft, and the second support shaft is an upper side of the long hole. A cab skylight device characterized by being slidable along. The cab skylight device according to claim 1,
A skylight device for a cab, wherein a cover for preventing rain is provided at an end on the front side of the opening.