JP2979392B1 - Cab front window opening and closing device - Google Patents

Abstract

The present invention provides a cab front window opening and closing device that is easy to move when the front window is opened and closed. SOLUTION: A pair of left and right guide rails extending in parallel from both sides of the front surface of the cab body to both sides of the ceiling, and a front surface movable along the guide rails between a closed position on the front surface of the cab and a storage position on the lower surface of the cab ceiling. A cab front window opening / closing device comprising a window and a locking means for locking the front window to the closed position and the storage position, wherein the lower portion is laterally protrudingly mounted on both lower side portions of the front window. A roller, a stay rotatably mounted at one end on each of upper sides of the front window, and an upper roller rotatably mounted at the other end of the stay, and guides the lower roller and the upper roller. It is configured to move along the rail.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front window opening and closing device mounted on a cab mounted on a construction machine or the like.

[0002]

2. Description of the Related Art In recent years, a cab mounted on a construction machine such as a power shovel has a front window that can be opened and closed to improve ventilation in the cab. The openable front window is configured to be movable between a closed position on the front surface of the cab and a storage position on the lower surface of the cab ceiling. Such a front window opening / closing device includes a pair of left and right guide rails extending in parallel from both sides of the front surface of the cab body to both sides of the ceiling. The roller and the lower roller are adapted to move between the closed position and the storage position along the guide rail, and include a lock means for locking the front window between the closed position and the storage position. This locking means
A latch sliding mounted on the upper end portion of the front window, which is closed latch receiver and the storage latch receiver Toka et provided with engagement holes of the latch and each engagement provided in the side panels of the cab body. In the front window opening / closing device configured as described above, when the front window positioned at the closed position is stored in the storage position, a slide latch that locks the front window to the cab body in the closing device is provided. Remove the front window along the guide rail while pulling the handle attached to the upper and lower ends of the front window, pulling the upper handle backward, and pushing up the lower handle upward while pulling out the engagement hole of the closing latch receiver. It is moved to the storage position, and at this storage position, the slide type latch is fitted into the engagement hole of the storage latch receiver.

[0003]

Since the guide rail is formed in a substantially L-shape, a considerable technique is required to move the front window along the guide rail. Further, in order to facilitate the locking operation between the closed position and the storage position by the locking means, the positional relationship between the upper roller and the slide-type latch, and the engagement of the upper roller with the closed latch receiver and the storage latch receiver. It is necessary to completely match the positional relationship with the hole, and if the positional relationship does not match, it becomes difficult to fit both latch receivers of the slide type latch into the engaging holes, and locking operability deteriorates. In order to facilitate the engagement between the slide type latch and the engagement holes of both latch receivers, if the engagement hole is made larger than the size of the latch, the front window is locked in the closed position and the storage position. Rattling occurs.

[0004] The present invention has been made in view of the above-mentioned facts, and a main technical problem is to provide a cab front window opening / closing device that can be easily moved when the front window is opened / closed. Another technical object of the present invention is to provide a cab front window opening / closing device that is easy to lock in a closed position and a stored position.

[0005]

According to the present invention, a pair of left and right guide rails extending in parallel from both sides of the front surface of the cab body to both sides of the ceiling are provided. A front window opening / closing device for a cab, comprising: a front window that can be moved between a closed position on the front surface of the cab and a storage position below the cab ceiling along with locking means for locking the front window to the closed position and the storage position. A lower roller protruding laterally at each of the lower side portions of the front window, a stay rotatably mounted at one end to each of the upper side portions of the front window, and a second end at the other end of the stay. An upper roller rotatably mounted, wherein the lower roller and the upper roller are configured to move along the guide rail, wherein a front window mounted on the cab is provided. Closing device is provided.

The lock means includes a lock mechanism disposed on an outer surface side of the front window, and a cab body side at a position opposed to the lock mechanism with the front window positioned at a closed position and a storage position. And a first and a second held member respectively fixed to the lock mechanism and held by the lock mechanism. Other features of the present invention will become apparent from the following description.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a front window opening / closing device mounted on a cab constructed according to the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows a power shovel as an example of a construction machine equipped with a cab having a front window opening / closing device configured according to the present invention. The illustrated power shovel has a lower traveling body 2 provided with a pair of traveling crawler tracks 2a and 2b, and an upper traveling body 3 mounted on the lower traveling body 2 so as to be pivotable. In this upper traveling body 3,
The working device 4 and the working device 4 and the traveling crawler 2a, 2
An engine room 5 for accommodating an engine serving as a power source for operating b is provided. In addition, a cab 6 on which an operator rides and performs work is disposed in front of the upper traveling body 3.

The cab 6 is provided with a pair of guide rails 7, 7 arranged from the front side of the cab body 60 to the ceiling side.
A front window 8 is movably disposed along the line. The pair of guide rails 7, 7 are disposed on front pillars 61, 61 constituting both front sides of the cab body 60, and are lower guide rails 71, 71 extending in the vertical direction in parallel with each other.
And side rails 63, 63 that are configured to be continuous with the front pillars 61, 61 and that are provided on both sides of the ceiling plate 62.
And upper guide rails 72, 72 extending substantially horizontally in parallel with each other. The lower guide rail 71 is, as shown in FIG.
Is formed by a concave groove formed on the inner surface of the. The upper guide rail 72 is formed of a channel material as shown in FIG. 7, and is attached to the inner surface of the side rail 63 by a fixing means such as welding. The upper guide rail 72 and the lower guide rail 71 are configured to be continuous. As shown in FIGS. 8 to 11, it is formed to be substantially L-shaped. As shown in FIGS. 8 to 11, the lower guide rail 7 constituting the guide rail 7
A first stopper 710 made of hard rubber or a suitable synthetic resin is provided at a lower end of the first guide rail 72, and a second stopper 720 made of hard rubber or a suitable synthetic resin is provided at a rear end of the upper guide rail 72. Have been.

The front window 8 will be described with reference to FIGS. The front window 8 has a window frame 81 as shown in FIG.
And a window glass 80 mounted on the window frame 81. As shown in FIG. 4, the window frame 81 has a cross-sectional structure that can be roll-formed by a single metal plate, and a window glass 80 is attached to an outer surface of the window frame 81 by an adhesive rubber 800. . As shown in FIG. 2, the window frame 81 has both upper corners formed in an arc shape. Support plates 82, 82 formed in a substantially L-shape inside the upper both corners (inside the room) are provided. Each is attached by a fixing means such as welding. The front window 8 configured as described above includes:
A handle 8 to be gripped when moving the front window 8 inside the lower part.
3, and the support plate 82,
Handles 84, 84 are also attached to the inside of 82.

Lower rollers 85 are mounted on both lower sides of the window frame 81, respectively. The lower rollers 85, 85 are respectively provided with roller pins 851, 851 protruding laterally on both lower sides of the window frame 81.
And rollers 852, 852 rotatably mounted on the roller pins 851, 851. A support plate 82, 82 attached to both upper corners of the window frame 81 has a stay 86, one end of which is rotatably mounted,
86 are provided. An example of a mechanism for rotatably mounting one end of the stay 86 to the support plates 82, 82 will be described with reference to FIG. In the embodiment shown in FIG. 4, a support pin 87 having a screw hole 871 at the end is fixedly attached to the support plate 82 by fixing means such as welding. A stepped bolt 88 screwed into a screw hole 871 of the support pin 87 is provided. A hole 861 formed at one end of the stay 86 is inserted into a collar 881 of the stepped bolt 88 to screw the screw 882 into the screw. One end of the stay 86 is rotatably supported by being screwed into the hole 871. As a mechanism for rotatably mounting one end of the stay 86 to the window frame 81, a support pin 87 may be rotatably mounted to the window frame 81, and one end of the stay 86 may be fixed to the support pin 87. .

On the other hand, upper rollers 89, 89 are mounted on the other ends of the stays 86, 86, respectively. As shown in FIG. 4, the upper roller 89 includes a roller pin 891 which is fixed to the other end of the stay 86 so as to protrude outward and is fixed to the other end of the stay 86.
It consists of two. The upper roller 89 may be configured such that a roller pin 891 is fixedly attached to the roller 892, and the roller pin 891 is rotatably mounted on the other end of the stay 86. In this way, the lower rollers 85, 85 and the upper rollers 89, 89 mounted on the front window 6 are fitted into the grooves of the guide rails 7, 7 as shown in FIGS. It can move while being guided along 7,7. Therefore, the front window 6 on which the lower rollers 85 and 85 and the upper rollers 89 and 89 are mounted, as shown in FIG.
1 from the closed position located in front of the cab 6 shown in FIG.
1 can move along the guide rails 7 between the storage positions positioned below the ceiling plate 62.

In the illustrated embodiment, there is provided a locking means 9 for locking the front window 6 in the closed position shown in FIG. 7 and the storage position shown in FIG. The lock means 9 includes a lock mechanism 9 attached to the support plates 82, 82, respectively.
0, 90 and the lock mechanism 90 with the front window 6 positioned in the closed position shown in FIG. 8 and the storage position shown in FIG.
The first and second held members 10 and 10 and the second held members 12 and 12 are respectively fixed to the cab 6 at positions facing each other. As shown in FIG. 4, the first held members 10 and 10 are made of a striker formed by forming a round bar steel material into a U-shape, and the width of the cab 6 is formed on the inner surface of the front hanging portion 621 of the ceiling plate 62. And are attached by fixing means such as welding. The second held members 12, 12 are formed of strikers having the same configuration as the first held members 10, 10, and are disposed on the inner surface of the rear portion 622 of the ceiling plate 62 in the width direction of the cab 6, and are fixed by welding or the like. Attached by means. In addition, as shown in FIG. 4, a window glass 80 attached to the outer surface of the window frame 81 is provided on the inner surface of the front hanging portion 621 of the ceiling plate 62.
A weather strip 14 which is a sealing member for preventing rainwater intrusion is mounted at a position opposite to the above.

Next, the lock mechanism 90 will be described mainly with reference to FIGS. The lock mechanism 90 includes an L-shaped mounting plate 91 on the support plate 82 by mounting bolts 911. This mounting plate 91
A support member 92 for supporting first and second holding members described later is attached. The support member 92 includes a pair of upper and lower sleeves 923 and 924 connecting the pair of side plates 921 and 922 and the pair of side plates 921 and 922.
The side plates 921 and 922 and each sleeve 9
23, 924 and bolts 931, 931, which are disposed through the mounting plate 92, and the bolts 931, 931
Mounting plate 91 by nuts 932, 932 screwed with
It is fixed to. The pair of side plates 921 and 922 constituting the support member 92 are provided with U-shaped grooves 921a and 922a at the central portion on the side facing the first held member 10 and the second held member 12, respectively. Bottom 921 on the side
b and 922b are bent.

A first holding member 94 is rotatably supported by the upper sleeve 923, and a second holding member 95 is rotatably supported by the lower sleeve 924. The first holding member 94 is provided with the first held member 1.
It has an arc-shaped (semicircular) groove 941 fitted to the zero and second held members 12, and a convex portion 942 formed inside the groove 941 and engaged with the second holding member 95. I have. The second holding member 95 includes an arc-shaped groove 951 that fits with the first held member 10 and the second held member 12 in cooperation with the first holding member 94, and the groove 951.
A nose 952 formed on the inner side, an engagement recess 953 formed on the inside of the nose 952 and engaging with the projection 942 formed on the first holding member 94, and the engagement recess 953
And a flange portion 854 formed inside. In addition,
The engagement recess 953 formed in the second holding member 95 and the first
As shown in FIG. 6, the first held member 10 or the second held member 12 is fitted between the two arc-shaped grooves 941 and 951 with the convex portion 942 formed on the holding member 94. They engage with each other in the held state, and hold the engaged state.

The second holding member 95 is integrally provided with a release lever 96 for rotating the second holding member 95 in the disengaging direction. The release lever 96 projects into the room through a hole (not shown) provided in the support plate 82 as shown in FIGS.

A torsion spring 97 is fitted on the upper sleeve 923. The torsion spring 97 includes a bottom portion 921b or 922 of a pair of side plates 921 and 922, one end portion 971 of which constitutes the support member 92.
b, and the other bent portion 972 is connected to the first holding member 94.
And the first holding member 94 is always in the groove 941.
It is urged to rotate in the opening direction (clockwise in FIG. 5). A torsion spring 98 is also fitted to the lower sleeve 924. One end 981 of the torsion spring 98 is engaged with the bottom 921b or 922b of the side plate 921 or 922 constituting the support member 92, and the other end bent portion 982 is engaged with the second holding member 95. The second holding member 95 is always biased to rotate in the direction in which the groove 951 opens (counterclockwise in FIG. 5). Therefore, when the lock mechanism 90 is in the unlocked state, the first holding member 94 and the second holding member 95 are maintained in the state shown in FIG.

The front window opening / closing device of the cab in the illustrated embodiment is configured as described above, and its operation will be described below. FIG. 9 shows a state in which the lower roller 85 mounted on the front window 8 is fitted to the lower guide rail 71 constituting the guide rail 7, and the upper roller 89 is fitted to the upper guide rail 72. In this state, the lower roller 85 is in contact with the first stopper 710, and the front window 8 is positioned at the lowest position. The operator grips the handles 84 from the state shown in FIG.
Is rotated forward (counterclockwise in FIG. 9) with the lower roller 85 as a fulcrum, the front window 8 is positioned at the closed position shown in FIG. 8, and the lock mechanism 90 is moved to the first position as shown in FIGS. And the locking means 9
Is locked.

The operation for locking the lock means 9 will be described. When the lock mechanism 90 is rotated forward with the front window 8 as a fulcrum about the lower roller 85 in the unlocked state shown in FIG. 5, the first holding member 94 has the convex portion 942 and the held portion of the first held member 10. The torsion spring 97 is relatively pressed by contacting the torsion spring 97 and is turned counterclockwise in the figure against the spring force of the torsion spring 97. In this manner, the first holding member 94 which is rotated in the counterclockwise direction in the drawing has a projection 942 having a nose 952 of the second holding member 95.
And press the second holding member 95 with the torsion spring 98.
Is turned clockwise in the figure against the spring force of the above.
When the projection 942 of the first holding member 94 gets over the nose 952 of the second holding member 95, the projection 942 engages with the engagement recess 953 formed on the second holding member 95 as shown in FIG. I do. For this reason, the return operation of the first holding member 94 and the second holding member 95 in the opening direction of the first holding member 94 and the second holding member 95 by the torsion springs 97 and 98 is regulated, and the first holding member 94 and the second holding member 95 are restricted. The locked state where the held portion 101 of the first held member 10 is held by the holding member 94 and the second holding member 95 is maintained. At this time, the first holding member 94 and the second holding member 95
Are arc-shaped grooves 941 and 951 formed in them.
Thus, the held portion 101 of the first held portion 10 is held so as to bite from above and below. In this way, the front window 8 is positioned at the closed position shown in FIG.

Next, the operation of positioning the front window 8 positioned at the closed position shown in FIG. 8 at the storage position on the lower surface of the ceiling 62 will be described. First, the locking means 9 shown in FIG.
When the operator holds down the grip 84 located near the lower side of the release lever 96 and presses down the release lever 96 downward in FIG. 6 with the thumb of the operator from the locked state of FIG. , The convex portion 942 of the first holding member 94 and the engaging concave portion 953 formed in the second holding member 95 are disengaged from each other. By pulling 84 forward (inside the vehicle compartment), front window 8 pivots rearward with lower roller 85 as a fulcrum, resulting in the state shown in FIG.

From the state shown in FIG. 9, when the grip 83 is gripped and the lower part of the front window 8 is pushed upward, the grip 84 is gripped and the upper part of the front window 8 is pulled backward (to the right in FIG. 9). The lower roller 85 moves upward along the lower guide rail 71, and the upper roller 89 moves to the upper guide rail 7.
2 (to the right in FIG. 9). When the lower roller 85 reaches the upper end of the lower guide rail 71, it moves rearward (to the right in FIG. 9) along the upper guide rail 72. The lower roller 85 and the upper roller 89 move along the guide rail 7 by moving the upper roller 89 to the supporting plate 82 attached to the window frame 81.
Since one end is mounted on a stay 86 rotatably mounted on the stay 86, the operation can be easily performed without requiring skill. When the upper roller 89 comes into contact with a second stopper 720 disposed at the rear end of the upper guide rail 72 as shown in FIG.
2 is restricted. When the handles 84, 84 are gripped from the state shown in FIG. 10 and the front window 8 is rotated upward (counterclockwise in FIG. 10) with the lower roller 85 as a fulcrum, the front window 8 is positioned at the storage position shown in FIG. And
As shown in FIG. 7, the lock mechanism 90 is connected to the second held member 1.
2 and the locking means 9 is locked. In addition,
The locking operation between the lock mechanism 90 and the second held member 12 is substantially the same as the locking operation between the lock mechanism 90 and the first held member 10 in the closed position. In this way, the front window 8 is held at the storage position. In addition,
The lock means 9 in the illustrated embodiment rotates the front window 8 with the lower roller 85 as a fulcrum, so that the lock mechanism 90 is fitted to the first held member 10 or the second held member 12. Since the lock state is set, the lock operability becomes easy.

Next, the upper guide rail 72 and the upper roller 8 constituting the guide rail 7 in the above embodiment.
Ninth embodiment will be described with reference to FIG. In this embodiment, the upper guide rail 7
The components other than 2 and the upper roller 89 are substantially the same as those in the above-described embodiment, and therefore, the same members are denoted by the same reference numerals and description thereof will be omitted. Upper guide rail 720 shown in FIG.
Is mounted on the ceiling plate 62 such that the lower portion is opened in a range where the upper roller 890 is formed by a channel material and moves. This upper guide rail 720
The rails 720a and 720b have their lower ends bent inwardly. The stay 86 is configured to move along the lower end opening portion 720c of the upper guide rail 720 thus configured, and a roller pin 890a attached to the other end of the stay 86 is rotatable on both sides of the stay 86, respectively. The mounted rollers 890b, 890c are connected to the rails 720a, 720.
20b, the rollers 890b, 890c are configured to move along the rails 720a, 720b. In the embodiment shown in FIG. 12, the upper guide rail 720 and the stay 86 can be formed in the same line, so that the space in the width direction can be effectively used, and each rotation fulcrum can be formed on the gravity line. The operation stability of the window 8 is also improved.

[0023]

The cab front window opening / closing device according to the present invention is constructed as described above, and has the following operational effects.

That is, according to the present invention, since the upper roller is mounted on the other end of the stay, one end of which is rotatably mounted on each of the upper side portions of the front window, the lower roller and the upper roller can be trained. It can be easily moved along the L-shaped guide rail without need.

Further, according to the present invention, the lock means includes a lock mechanism disposed on the outer surface side of the front window, and a position opposite to the lock mechanism when the front window is positioned at the closed position and the storage position. And the first and second held members respectively fixed to the cab body side and held by the lock mechanism, so that the lock mechanism is rotated by rotating the front window with the lower roller as a fulcrum. Since the locked state is established by fitting the first held member or the second held member, the lock operability is facilitated.

Further, according to the present invention, the upper guide rail is formed of a channel material having an open bottom, and its lower end is bent inward to form a rail portion. It is configured to move along the open part, and the upper roller attached to the other end of the stay is placed on the rail, so the upper guide rail and the stay can be configured on the same line , so The space can be used effectively,
Since each rotation fulcrum can be configured on the gravity line, the operation stability of the front window is also improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a hydraulic shovel equipped with a cab equipped with a front window opening / closing device configured according to the present invention.

FIG. 2 is a front view of a front window mounted on the cab of FIG. 1;

FIG. 3 is a side view of the front window of FIG. 2;

FIG. 4 is a sectional view taken along the line AA in FIG. 1;

FIG. 5 is a front view showing an open state of a lock mechanism used in the front window opening / closing device configured according to the present invention.

FIG. 6 is a front view showing a locked state of a lock mechanism used in the front window opening / closing device configured according to the present invention.

FIG. 7 is a sectional view taken along the line BB in FIG. 1;

FIG. 8 is a diagram illustrating a relationship between a guide rail and a front window of the front window opening / closing device configured according to the present invention, in which the front window is positioned at a closed position and locked by locking means.

FIG. 9 is a diagram illustrating a relationship between a guide rail and a front window of the front window opening / closing device configured according to the present invention, illustrating a state in which the front window is positioned at a closed position and the lock by the locking means is released.

FIG. 10 is a diagram illustrating a relationship between a guide rail and a front window of the front window opening / closing device configured according to the present invention, in which the front window is positioned at the storage position and the lock by the locking means is released.

FIG. 11 is a diagram showing a relationship between a guide rail and a front window of the front window opening / closing device configured according to the present invention, in which the front window is positioned at a storage position and is locked by locking means.

FIG. 12 is a sectional view showing another embodiment of an upper guide rail and an upper roller of the front window opening / closing device configured according to the present invention.

[Explanation of symbols]

 2: Lower traveling body 3: Upper traveling body 4: Working equipment 5: Engine room 6: Cab 60: Cab body 61: Front pillar 62: Ceiling plate 63: Side rail 7: Guide rail 71: Lower guide rail 710: First Stopper 72: Upper guide rail 720: Second stopper 8: Front window 80: Window glass 81: Window frame 82: Support plate 83: Handle 84: Handle 85: Lower roller 86: Stay 89: Upper roller 9: Locking means 90: Locking mechanism 91: Mounting plate 92: Support member 921: Support member side plate 922: Support member side plate 923: Sleeve 924: Sleeve 94: First holding member 95: Second holding member 96: Release lever 97: Torsion spring 98: Torsion spring 10: First held member 12: Second held member 14 Weather strip

────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Noriaki Endo 1-1-1 Shiohama, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Press Industry Co., Ltd. (56) References JP-A-8-72536 (JP, A) 62-248775 (JP, A) JP-A-7-317106 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) E02F 9/16 B60J 1/00

Claims (3)

(57) [Claims] 1. A pair of left and right guide rails extending in parallel from both front sides of a cab body to both sides of a ceiling, and can be moved along the guide rails between a closed position on the front of the cab and a storage position on the lower surface of the cab ceiling. A front window opening / closing device for a cab, comprising: a front window; and a locking means for locking the front window to the closed position and the storage position, wherein a lower portion protruding laterally from a lower side of the front window. A roller, a stay rotatably mounted at one end on each of upper sides of the front window, and an upper roller rotatably mounted at the other end of the stay, wherein the lower roller and the upper A front window opening / closing device for a cab, wherein a roller is configured to move along the guide rail. 2. The locking device according to claim 1, wherein said locking means includes a locking mechanism disposed on an outer surface side of said front window, and a position in which said front window faces said locking mechanism when said front window is positioned in said closed position and said storage position. The cab front window opening / closing device according to claim 1, further comprising first and second held members fixed to the cab body side and held by the lock mechanism, respectively. 3. The pair of guide rails comprises a vertically extending lower guide rail and a horizontally extending upper guide rail, and the upper guide rail is formed by a channel material which is open at the bottom, and each of which has a lower end. The stay is bent inward to form a rail portion, and the stay is configured to move along the lower end opening of the upper guide rail, and the upper roller attached to the other end of the stay is provided with the upper roller. 2. The front window opening / closing device for a cab according to claim 1, which is mounted on a rail portion.