KR20010062121A - Cabin for construction machinery - Google Patents

Abstract

PURPOSE: To provide an operator cab for a construction machine capable of retaining a front lower window removed in opposed to a side wall, effectively utilizing a space formed between the side wall and the front lower window retained, enhancing a usability of equipment disposed in a room and enhancing a comfortability. CONSTITUTION: This operator cab for a construction machine has a front upper window 8 positioned at a front side of a driver's seat 2, a front lower window 9 positioned below this front upper window 8 and attachably/detachably arranged, and a side wall inner surface 6s of which a horizontal cross section is outwardly curved. The operator is provided with retaining means 19, 20, 21 for retaining the front lower window 9 removed in opposed to the side wall inner surface 6s curved. A space V formed between the front lower window 9 retained and the side wall inner surface 6s opposed thereto is used as an article-housing space such as a magazine rack 18, etc.

Description

Cab for construction machinery {CABIN FOR CONSTRUCTION MACHINERY}

The present invention relates to a construction machine cab used for construction machinery such as hydraulic excavators.

The hydraulic excavator as a construction machine includes a traveling body, a swinging body rotatably disposed around the vertical axis on the upper part of the traveling body, a boom rotatably mounted on the swinging body around a horizontal axis, and rotatably mounted on the tip side of the boom. And a bucket which is rotatably mounted on the tip side of the arm. Moreover, a cab is provided in the said turning body, and a cab is provided in this cab. The operator is seated in the driver's seat and manipulates an operating lever or operation pedal to control the traveling operation of the traveling body, the turning operation of the turning body, the rotation operation of the boom, the arm and the bucket, and the like. Run the job.

When the work by the hydraulic excavator is performed, the operator needs to look around, so that a plurality of windows are provided in the cab. Specifically, the upper upper window at the front of the driver's seat, the front lower window at the lower side of the front upper window, the rear sole at the rear position of the driver's seat, the right side sole at the right upper position of the driver's seat, and the left upper position of the driver's seat The window is installed. These windows generally consist of transparent glass, and are fixed and slightly openable or detachable, depending on the application.

In addition, an opening serving as an entrance and exit is formed in the left wall of the cab, and a door for opening and closing the opening is provided. Therefore, the left side window is generally divided into a left side front window provided in the door and a left side rear window provided behind the opening.

By the way, when carrying out excavation work by the said hydraulic excavator, for example, the earth and sand of the place close to a cab may be excavated. In this case, the worker sees the work place through the front lower window, but since the front lower window is located closer to the ground than other windows, it is easy to attach soil, etc. There is a risk of deterioration. Therefore, when the front lower window is detachably arranged and the work in the place close to the cab is performed, the front lower window is dismantled to perform the predetermined work while securing a good visual field.

When the work is performed by separating the front lower window as described above, it is necessary to maintain the separated front lower window at a predetermined place in the cab. In the past, it has been configured to be held on the rear side of the driver's seat. However, in recent years, it has become difficult to secure a holding space on the rear side of the driver's seat due to the miniaturization of the cab and the increase of equipment in the cab.

Thus, a cab configured to arrange and hold the front lower window so as to overlap the rear window is used. However, in this cab, a bracket or the like that maintains the anterior lower window is located at the position near the head when the operator stands in the cab, so it tends to give psychological pressure to the worker even if it is not dangerous. It will impair the comfort of the room. In addition, the rear sole may be used for emergency evacuation when the door does not open due to soil disintegration or the like during excavation, for example. However, the rear sole is disposed in front of the rear sole to overlap the rear sole. Since it is blocked by a window, there exists a possibility that it may interfere with using a rear insole for emergency escape. Therefore, the structure which arrange | positions and hold | maintains a front lower window in the side wall side of a cab is proposed.

By the way, in recent years, the cab which has the side wall which curved the horizontal cross section to the outer side has spread. The side walls are curved to prevent the outer circumference of the cab from protruding from the outer circumference of the swivel body when the outer circumferential shape is provided in a circular swivel body, and to maximize the space in the cab as much as possible. In the case where the front lower window is arranged and held on the side wall side of the cab, it is necessary to secure a holding space for holding the front lower window in advance, and equipment and the like can be arranged on the side wall portion facing the retained front lower window. There is a problem that dead space exists because it becomes impossible. In particular, as the side walls are curved, the length of the front and rear directions of the side wall portions covered by the planar front lower window becomes longer than the case where the side walls are planar, and the dead space becomes large. The presence of this dead space has been a major obstacle in meeting the demand for the placement of numerous pieces of equipment in a compact cab. This is because, if a large number of equipments are arranged in a narrow space, the usability of the equipments is lowered and the comfort of the cab may be impaired.

The present invention has been made to solve the above-mentioned drawbacks, and its object is to keep the separated front lower window facing the side wall and at the same time effectively utilize the space formed between the side wall and the retained front lower window, An object of the present invention is to provide a cab for construction machinery that can improve the usability of the arranged equipment and improve comfort.

1 is a horizontal sectional view showing a main part of an embodiment of the present invention.

2 is a front view of the cab.

3 is a left side view of the cab.

Figure 4 is a front view showing the vicinity of the lower end of the mounted front lower window.

FIG. 5 is a cross-sectional view taken along the line V-V of FIG. 4.

6 is a left side view for explaining a separation operation of the front lower layer.

(A) is sectional drawing seen from the cut line A-A of FIG. 4, (b) is sectional drawing seen from the cut line B-B of FIG.

8 is a side view showing a holding state of the front lower window.

(A) is a front view which shows the holding | maintenance state of a front lower window, (b) is a rear view.

10 shows the configuration of the locking means, (a) is a plan view, (b) is a front view, and (c) is a side view.

It is a side view for demonstrating another embodiment of this invention.

(A) is a front view which shows the holding | maintenance state of FIG. 11, (b) is a rear view.

(Explanation of the sign)

1 ----- cab 2 ----- cab

4 ----- body 5 ----- slidedoor

5b ---- Circumference edge 6 ----- Side wall

6a ---- circumference 6s ---- inside

7 ----- Door opening 8 ----- Front upper window

9 ----- Front bottom window 18 ----- Magazine rack

19 ---- bracket 20 ---- bracket

20b --- Guide 21 ---- Lock means

V ----- Storage space

The cab for a construction machine according to claim 1 has a front upper window 8 located in front of the driver's seat 2, and a front lower window 9 disposed below and detachably disposed at the front upper window 8, respectively. And a side wall inner surface 6s having a horizontal cross section curved outwardly, wherein the separated front lower window 9 faces the curved side wall inner surface 6s. The magazine rack 18 is provided with holding means 19, 20, and 21, and is formed between the retained front lower window 9 and the side wall inner surface 6s opposite the front lower window 9. It is characterized in that it is configured to be used as an article storage space, such as).

In the construction machine cab of claim 1, the separated front lower window 9 is maintained facing the inner side surface 6s of the side wall curved by the holding means 19, 20, 21. At this time, since the side wall inner surface 6s is curved outward, a space V is formed between the front lower window 9 and the side wall inner surface 6s to be curved outward and the width of the center portion is widest. The space V is partitioned inside by the front lower window 9, but since the upper side is open, a magazine rack 18 is placed in the space V, for example, to carry in and take out the magazine in the vertical direction. In other words, the space V, which was conventionally a dead space, can be used as an article storage space.

Thus, according to the cab for a construction machine according to claim 1, since the space V, which is conventionally used as a dead space, is used as an article storage space, the side wall portion that has conventionally been used for an article storage space can be used for another purpose. Therefore, the freedom degree at the time of arrange | positioning an equipment article on the side wall 6 becomes large, and an equipment article can be arrange | positioned in the position which an operator is easy to use. Thereby, the usability of the equipment arrange | positioned indoors improves and the comfort in a cab also improves by this.

In addition, the cab for a construction machine according to claim 2 forms an opening 7 in the side wall 6 whose horizontal section is curved outwardly, and at the same time includes a slide door 5 for opening and closing the opening 7 of the side wall 6. It is mounted so as to be movable in the front-rear direction along the outer surface, and the slide door 5 is configured to be received by being pulled into the cab in the closed position and at the same time the side wall circumferential edge 6a facing the opening 7 is provided. To be recessed into the cab so as to overlap the circumferential edge portion 5b of the slide door 5 in the closed position, and the retaining means 19, 20, 21 are separated from the front lower window 9 Is maintained at the front side or the rear side of the opening 7 and at the same time the circumferential edge on the side of the opening 7 of the front lower window 9 is located near the side wall circumferential edge 6a. I am doing it.

In the cab for a construction machine according to claim 2, the front lower window 9 is separated from the front or rear side of the opening 7 on which the slide door 5 is mounted. It is held so as to be located in the vicinity of the edge portion 6a of the side wall facing 7). At this time, the side wall circumferential edge portion 6a is concave into the cab, and in this state, the side wall 6 is largely bent inward in the vicinity of the circumferential edge portion 6a. Therefore, the space V formed between the front lower window 9 and the side wall inner surface 6s has a substantially horizontal cross section and has the largest width on the side of the opening 7. This space V has a larger width than the case where only the front lower window 9 is disposed facing the curved surface.

As described above, according to the construction machine cab according to claim 2, since the article storage space V can be largely secured, more articles or larger articles can be stored.

In addition, in the cab for a construction machine according to claim 3, the holding means includes brackets 19 and 20 for supporting the lower end of the front lower window 9 and locking means 21 for restraining the movement of the front lower window 9. It is characterized by having).

In the cab of the construction machine of claim 3, the retained front lower window 9 has its lower end supported by brackets 19 and 20, and the height of the upper end is restricted, and its movement is prevented by the locking means 21. Is constrained. Thus, according to the cab for a construction machine according to claim 3, the front lower window 9 is maintained at a constant height with respect to the side wall 6, and its movement is constrained so that it does not move or vibrate even when the construction machine is running or working. The front lower window 9 can be firmly held.

The cab for a construction machine according to claim 4 is characterized in that the holding means has guide means 20b for guiding the front lower window 9 to a holding position.

In the cab for a construction machine according to claim 4, the front lower window 9 is guided to a predetermined holding position by the guiding means 20b. Therefore, the front lower window 9, which is generally formed of glass and has a relatively large weight, can be easily disposed in the holding position, and the burden on the worker is reduced.

EMBODIMENT OF THE INVENTION Next, the specific embodiment of the construction machine cab of this invention is described in detail, referring drawings. 1 is a horizontal cross-sectional view showing a main part of an embodiment of the present invention, FIG. 2 is a front view of a cab for construction machinery (hereinafter simply referred to as a cab) 1, and FIG. 3 is a left side view of the cab 1. to be.

The cab 1 is installed in, for example, a hydraulic excavator that is a construction machine. In general, the hydraulic excavator is provided with a traveling body, a swinging body disposed rotatably around a vertical axis on an upper portion of the traveling body, a boom rotatably mounted around a horizontal axis on the swinging body, and rotatably mounted on the tip side of the boom. And a bucket which is rotatably mounted on the tip side of the arm. And the cab 1 is provided in the said turning body.

The driver's seat 2 is provided in the cab 1. The operator 3 is seated in the driver's seat 2 to operate the operation lever or the operation pedal to control the traveling operation of the traveling body, the turning operation of the swinging body, the rotational operation of the boom, the arm and the bucket, and the like. A predetermined operation such as transportation is performed.

The cab 1 includes a substantially box-shaped body 4 and a slide door 5. The main body 4 has an opening for a door that extends from the front edge side to the approximately middle position in the front and rear direction on the left side wall (hereinafter referred to as the left wall) 6 as viewed from the operator 3 seated in the driver's seat 2. 7 is formed as an entrance and exit of the worker 3. The slide door 5 is mounted to the main body 4 so that the slide door 5 can slide in the front-rear direction along the outer surface of the left wall 6 between the closing position for closing the door opening 7 and the opening position for opening. Moreover, the front end of the slide door 5 is provided with the handle 5a for opening and closing this slide door 5.

The left side wall 6 of the main body 4 is formed by bending outward so that the horizontal cross section may become substantially arcuate in conformity with the outer circumferential surface of the circular swinging body (not shown) on which the main body 4 is mounted. Thereby, it is comprised so that the space volume of the main body 4 may become very large. In the closed position, the slide door 5 is held such that its outer surface forms the same surface as the outer surface of the left wall 6, as indicated by the solid line in FIG. In addition, when the slide door 5 is slid from the closed position to the open position, the slide door 5 is moved in the direction extending outward from the closed position at the beginning of the slide, and then, in FIG. It is comprised so that it may slide back to the open position shown by the dashed-two dotted line. Then, the circumferential edge portion 6a of the left side wall 6 facing the door opening 7 is bent so as to be recessed into the cab 1 so that the circumferential edge portion of the slide door 5 in the closed position ( It is formed so as to overlap 5b).

In addition, since the worker 3 needs to look around when working with the hydraulic excavator, the cab 1 is provided with a plurality of windows. Specifically, the front upper window 8 at the front upper position of the driver's seat 2, the front lower window 9 at the lower part of the front upper window 8, and the rear sole at the rear upper position of the driver's seat 2 Not shown), the right side sole 10 is provided in the upper right position of the driver's seat 2, and the left side sole 11a, 11b, 11c is provided in the left position of the driver's seat 2. As shown in FIG. These windows are made of transparent glass and are arranged in the openings for the windows formed in the main body 4 in a fixed or openable or detachable manner depending on their use.

In this embodiment, the front lower window 9 is arranged detachably. This is because the front lower window 9 is located closer to the ground than the other windows, so it is easy to attach soil and the like, and a good clock is often not obtained, and work efficiency is performed when working at a place close to the cab 1. This is because there is a risk of deterioration of work accuracy. Therefore, when performing work of the place close to the cab 1, a desired work can be performed in the state which secured the favorable clock by removing the front lower window 9. Moreover, the front upper part window 8 is arrange | positioned so that opening and closing is possible. This is for the operator 3 to separate the front lower window 9 from the outside as will be described later. And the rear window which is not shown in figure is arrange | positioned so that opening and closing is possible. This is to make it possible to use it for emergency escape, for example, when the slide door 5 does not open due to earth and sand collapse during an excavation work.

Moreover, the right side window 10 is arrange | positioned so that opening and closing is possible. On the other hand, the left side windows 11a, 11b, 11c are fixedly arranged. Moreover, since the door opening 7 is formed in the left side wall 6 of the main body 4, and the slide door 5 which opens and closes this door opening 7 is attached, the left side window is a slide door ( The left part front upper window 11a arrange | positioned at the upper side of 5), the left part front lower window 11b arrange | positioned under this left part front upper window 11a, and the left part arrange | positioned behind the door opening 7. It is comprised by rear part 11c.

A feature of the present invention is that when the detachable anterior lower window 9 is detached, the separated anterior lower window 9 is held facing the inner surface 6s of the left wall 6 which is curved outward, The space V formed between the retained front lower window 9 and the inner surface 6s of the left wall 6 opposite thereto is used as the article storage space.

First, the detachable structure of the front lower window 9 is demonstrated. FIG. 4 is a front view showing the vicinity of the lower end of the mounted front lower window 9, and FIG. 5 is a sectional view seen from the cut line V-V side of FIG. The anterior lower window 9 is normally attached to an opening 12 for anterior lower window formed below the anterior upper window 8 as shown in FIGS. 2 and 4. A substantially U-shaped window frame 14 is provided in the peripheral portion 13a of the front wall 13 facing the opening 12 for front lower window. The window frame 14 has an outer vertical portion 14a and an inner vertical portion 14b formed in parallel with each other, and each of the vertical portions 14a and 14b has seal members 15a and 15b formed of elastic bodies such as soft rubber, respectively. Is attached. The front lower window 9 is fitted in close contact with the pair of sealing members 15a and 15b while the peripheral portion thereof is fitted between the pair of vertical portions 14a and 14b.

However, the pair of vertical portions 14a and 14b are formed only at the left vertebrae side of the front lower window opening 12, and are formed at only one side at the upper end and the lower end. In detail, the inner side vertical part 14b is not formed in the upper end side, and only the outer side vertical part 14a and the outer side sealing member 15a are provided. On the other hand, at the lower end side, the outer vertical portion 14a is not formed, and only the inner vertical portion 14b and the inner seal member 15b are provided. Therefore, as shown in FIG. 6, when the worker 3 extends his hand from the outside and lifts the front lower window 9 upward, the front lower window 9 is released from the window frame 14.

By the way, the lower end of the front lower window 9 contacts and supports the support parts 16 and 16 provided in the bottom part 14c of the window frame 14. As shown in FIG. As a result, a constant gap W1 is formed between the lower end portion of the front lower window 9 and the bottom portion 14c of the window frame 14 (see FIG. 7A). Therefore, the worker 3 can raise the front lower window 9 by inserting the finger 3a into this clearance gap W1. However, when the gap W1 is increased, the front lower window 9 is easier to be lifted by the worker 3, but foreign matters such as soil and sand are easily invaded from the outside, so it cannot be made too large and is set to about 10 mm. have. Here, a rectangular gripping notch (hereinafter simply referred to as a notch) 17 is formed in the substantially center portion of the lower end portion of the front lower window 9. As a result, the length of the gap W2 between the bottom part of the notch 17 and the bottom part 14c of the window frame 14 becomes larger than the length of the gap W1, so that the operator 3 has a finger 3a. (See (b) of FIG. 7), and as a result, the front lower window 9 is easily lifted. The depth of the notch 17 is about 15 mm, so that the length of the gap W2 between the front lower window 9 and the window frame 14 is about 25 mm. This length of 25 mm is generally known as a length for a person to easily insert a finger.

From the above, when removing the front lower window 9, as shown in FIG. 6, the operator 3 opens the front upper window 8, extends the hand outward, and inserts the finger 3a into the notch 17 portion. The front lower window 9 may be lifted up and pulled out of the window frame 14. In addition, the notch 17 can also be used when listening to the disassembled front lower window 9. Moreover, when attaching the front lower window 9, the worker 3 should just insert and insert the front lower window 9 from the upper end side of the window frame 14 in the room side.

Next, the holding structure of the separated front lower window 9 will be described. The separated front lower window 9 is held in opposition to the inner surface 6s of the left wall 6, which is curved by a predetermined holding means as shown in FIG. More specifically, the front lower window 9 has a circumferential edge on the side of the opening 7 for the door below the left rear window 11c from the rear side of the door opening 7 on which the slide door 5 is mounted. The addition is maintained to be in the vicinity of the circumferential edge portion 6a of the left wall 6. At this time, the front lower window 9 is maintained such that its long side is in the up and down direction, and the short side is in the front and rear direction, and the lower end thereof is kept slightly above the lower end of the left rear window 11c.

Here, the circumferential edge portion 6a of the left wall 6 is concave inwardly of the cab 1 as described above, and in this state, the left wall 6 is moved inward from the circumferential edge portion 6a. It is largely bent. Therefore, the article storage space V formed between the front lower window 9 and the inner surface 6s of the left side wall 6 has a substantially horizontal cross section and has the largest width on the side of the opening 7 for the door.

In addition, this article storage space V has a larger width than the case where the front lower window 9 is simply arranged to face the inner surface 6s of the curved left wall 6. The article storage space V is partitioned inside by the front lower window 9, but since the upper side is open, the magazine rack 18 is arranged to carry in and take out the magazine in the vertical direction.

FIG. 8 is a side view showing a holding state of the front lower window 9, and FIG. 9A is a front view of the retained front lower window 9 viewed from the front side (arrow F direction in FIG. 8), and FIG. (B) is a rear view seen from the rear side (arrow R direction of FIG. 8). 8 is a figure seen from the left wall 6 side, the left wall 6 is omitted for clarity.

The holding means has a pair of brackets 19 and 20 serving as supporting means and locking means 21 serving as restraining means. The pair of brackets 19 and 20 are attached to the lower side of the left wall 6 and support the lower end of the front lower window 9. On the other hand, the locking means 21 is attached at an approximately center position in the vertical direction at the front side of the front lower window 9 to restrain the movement of the front lower window 9.

The bracket 19 arranged on the front side includes a flat plate-shaped support portion 19a, a restricting portion 19b erected in a substantially vertical direction from one end side of the support portion 19a, and the other end side of the support portion 19a. Has an attachment portion 19c that is spoken in the opposite direction to the restricting portion 19b. The attachment portion 19c is formed in a flat plate shape and has two through holes 19d and 19d. The bracket 19 is a bolt in which the restricting portion 19b is located on the interior side and the supporting portion 19a is approximately horizontal, and is penetrated through the through holes 19d and 19d of the attachment portion 19c. Is attached to the left side wall (6). The front lower window 9 is supported by its lower end surface in contact with the supporting portion 19a, and at the same time, movement to the interior side is restricted by the restricting portion 19b.

On the other hand, the bracket 20 disposed on the rear side includes a support portion 20a having a groove 20d formed thereon, a guide portion 20b erected in an inclined direction at one end of the support portion 20a, and a support. It has the attachment part 20c formed in the lower part of the part 20a. The width of the groove 20d is set slightly larger than the thickness of the front lower window 9. In addition, the guide part 20b is formed in parallel with the longitudinal direction of the groove 20d. The bracket 20 is arranged in a posture in which the guide portion 20b is positioned on the left wall 6 side, and the groove 20d of the support portion 20a extends substantially in the horizontal direction, and the attachment portion 20c is disposed. It is fixedly attached to the bottom or left wall 6 of the cab 1 (main body 4). The front lower window 9 is supported by being fitted with its lower end inserted into the groove 20d of the base 20a. Moreover, when the lower end part of the front lower window 9 contacts the guide part 20b, since the said guide part 20b is inclined, the lower part part is guided to the groove 20d of the base part 20a. In other words, the guide portion 20b functions as a guide means for guiding the front lower window 9 to a predetermined holding position.

As shown in FIG. 10, the locking means 21 has a main body portion 22 and a pair of fitting portions 23 and 24 provided in the main body portion 22. As shown in FIG. The main body portion 22 is formed in a relatively flat rectangular parallelepiped shape and has a pair of bolt through holes 22a and 22a formed side by side in the longitudinal direction. One fitting portion 23 is formed to protrude from the other side on one side of the long side of the main body portion 22, the length is the same as that of the main body portion 22, and the height (bolt through hole 22a in the axial direction). Length along the side) is set smaller than that of the main body portion 22 so that a gap is formed between the fitting portion 24.

On the other hand, the other fitting part 24 is rotatably attached to the substantially center part of one surface (the surface which the bolt through-hole 22a opens) of the main-body part 22. As shown in FIG. In detail, the fitting portion 24 has a flat fitting plate 24a and a handle 24b formed on one surface of the fitting plate 24a. The fitting plate 24a has a width smaller than the gap between the bolt through holes 22a and 22a, and the length is set to be approximately equal to the sum of the respective widths of the main body portion 22 and the fitting portion 23. The fitting portion 24 has a position where the longitudinal direction of the fitting plate 24a is orthogonal to the longitudinal direction of the body portion 22 (lock position), and the longitudinal direction of the fitting plate 24a is defined by the body portion 22. It is rotatably attached between the positions parallel to the longitudinal direction (release position). In the locked position, the front end side of the fitting portion 23 on the fixed side and the fitting portion 24 on the movable side oppose each other, and the pair of fitting portions 23, 24 around the periphery of the front lower window 9 is provided. Fit tightly to constrain the movement. In addition, the fitting portion 23 on the fixed side has a pair of fitting pieces 23a and 23a arranged in the longitudinal direction, and the fitting piece 23a is pressed against the surface of the front lower window 9 by using an elastic force. have. The elongate bar-shaped contact part 23b which contacts the surface of the front lower window 9 is formed in the front end side of the fitting piece 23a.

The locking means 21 of the above-described configuration is arranged at the tip end of the circumferential edge portion 6a of the left wall 6. After setting the movable side fitting part 24 of the lock means 21 to a release position, the worker 3 lifts the separated front lower window 9 in the state which the notch 17 is located to the front side, and in this state While contacting the lower end portion of the lower end portion with the pair of brackets 19 and 20, the position in the front and rear direction is adjusted so that the inner circumferential edge portion of the notch 17 is brought into contact with the fixing side fitting portion 23 of the locking means 21. . Then, the operator 3 holds the handle 24b and rotates the movable side fitting portion 24 to the locked position. Thereby, the front lower window 9 is maintained at a constant height with respect to the left wall 6, and its movement is restrained.

The locking means 21 is in close contact with the circumferential edge of the front side of the front lower window 9, but at this time, the locking means 21 is disposed at the position where the inner circumferential edge of the notch 17 is fitted. The front lower window 9 can be kept as close as possible to the opening 7 for the door without protruding to 7). This can prevent the slide door 5 and the front lower window 9 or the locking means 21 from interfering at the circumferential edge of the door opening 7.

In addition, an elastic material such as rubber is provided on the inner surface 6s of the left wall 6 at a position slightly upward from the front of the bracket 19 attached to the front side and a position upward from the rear of the locking means 21. The stoppers 25 and 25 which consist of these are attached. Moreover, the stopper 26 located in the room side rather than the bracket 20 (FIG. 1) in the position of the height substantially equal to the locking means 21 in the upper side of the bracket 20 attached to the rear side (refer FIG. 3). Is attached). By arranging these stoppers 25 and 26, the front lower window 9 is prevented from falling to the left wall 6 side or the interior side when the front lower window 9 is supported by the brackets 19 and 20, The locking operation and the unlocking operation of the comparatively heavy front lower window 9 can be safely performed.

As described above, according to the present embodiment, the space V formed between the retained front lower window 9 and the inner surface 6s of the left side wall 6, that is, a space that was conventionally a dead space, is used as the article storage space. Therefore, the side wall portion that has conventionally been used for the article storage space can be used for other purposes. Accordingly, the degree of freedom in arranging the equipment on the side wall is increased, and the equipment 3 can be arranged at a position where the worker 3 is easy to write. Thereby, the usability of the equipment goods arrange | positioned in the cab 1 improves, and also the comfort in the cab 1 improves accordingly.

Moreover, as the side wall part which arrange | positions the front lower side window 9, the circumferential edge part 6a of the left side wall 6 which enters inside a cab, ie, the left side wall 6, is located in the vicinity of the circumferential edge part 6a. Since a largely bent portion is used inward, the article storage space V can be largely secured. As a result, more or larger items can be stored.

In addition, since the front lower window 9 is maintained at a constant height with respect to the left wall 6 and its movement is constrained, the front lower window 9 is firmly fixed without moving or vibrating even when the construction machine is running or working. ) Can be maintained.

In addition, when the lower end portion of the front lower window 9 is brought into contact with the bracket 20, the lower end portion is guided to the groove 20d which becomes the holding position by the guide portion 20b of the bracket 20, so that the weight is relatively large. The front lower window 9 can be easily placed in the holding position, reducing the burden on the operator.

Moreover, according to this embodiment, since the rectangular notch 17 was formed in the substantially center part of the lower end part of the front lower window 9 at the time of mounting, the worker 3 has the front lower window 9 and the window frame in which it was mounted ( The fingers 3a are easily inserted between the 14th portions, and the front lower window 9 is easily lifted. In addition, the notch 17 can also be used when listening to the separated front lower window 9. This makes it easy to dismantle and arrange the front lower window 9.

Moreover, the locking means 21 is arrange | positioned at the circumferential edge part 6a of the left side wall 6 which faces the opening 7 for a door, and fits the circumferential edge of the front side of the front lower window 9, In embodiment, since it is arrange | positioned in the position which pinches the inner peripheral edge part of the notch 17, the front lower window 9 is made possible as much as possible, without protruding the locking means 21 to the opening 7 for door. It can be maintained at a position close to 7). This can prevent the slide door 5 and the front lower window 9 or the locking means 21 from interfering at the edge of the door opening 7.

Although specific embodiment of this invention was described above, this invention is not limited to the said form, It can variously change and implement within the range of this invention.

FIG. 11 is a side view showing another embodiment of the present invention, FIG. 12A is a front view of the retained front lower window 9 seen from the front side (arrow F direction in FIG. 11), and FIG. 12B Is a rear view seen from the rear side (arrow R direction in FIG. 11). 11 is a figure seen from the left wall 6, the left wall 6 is omitted for clarity.

The feature of the present embodiment is that the restraint belt 31 is used instead of the lock means 21 as restraining means for restraining the movement of the front lower window 9. The restraint belt 31 has a belt body 32 and a buckle portion 33 for adjusting the length of the belt body 32. On the other hand, with respect to the front lower window 9 supported by the pair of brackets 19 and 20, the left side wall 6 corresponding to the vicinity of the upper side of the rear side and the upper side of the notch 17 is shown. The support arms 34 and 35 are attached to each other. The restraint belt 31 is provided by winding the belt body 32 around the support arms 34 and 35.

When the front lower window 9 is held, the operator 3 operates the buckle 33 to lengthen the belt main body 32 to make it loose, and then arranges the front lower window 9 at a predetermined holding position. The belt body 32 is shortened by operating the buckle portion 33, and the belt main body 32 is tightened between the support arms 34 and 35. As a result, the restraint belt 31 is wound in an inclined direction from the upper end surface to the front end surface with respect to the front lower window 9, and the movement of the front lower window 9 is restrained. When the restraint is loosened, the restraint belt 31 may be loosened by operating the buckle portion 33 as described above. Also in this embodiment, the effect similar to embodiment mentioned above is acquired.

Moreover, in each said embodiment, although the front lower window 9 is hold | maintained in the back side of the door opening 7, you may make it hold | maintain in the front side, when a space exists in the front side.

As described above, according to the present embodiment, the space V formed between the retained front lower window 9 and the inner surface 6s of the left side wall 6, that is, a space that was conventionally a dead space, is used as the article storage space. Therefore, the side wall portion that has conventionally been used for the article storage space can be used for other purposes. Accordingly, the degree of freedom in arranging the equipment on the side wall is increased, and the equipment 3 can be arranged at a position where the worker 3 is easy to write. Thereby, the usability of the equipment goods arrange | positioned in the cab 1 improves, and also the comfort in the cab 1 improves accordingly.

Claims (4)

It has a front upper window 8 located in front of the driver's seat 2, and a front lower window 9 positioned below the front upper window 8 and detachably arranged, and having a horizontal cross section outside. In the cab for a construction machine having the curved side wall inner surface 6s, holding means (19, 20, 21) for holding the separated front lower window (9) facing the curved side wall inner surface (6s). A space V formed between the retained front lower window 9 and the side wall inner surface 6s facing the front lower window 9 as an article storage space such as a magazine rack 18. Cab for construction machinery, characterized in that configured. 2. The slide door (5) according to claim 1, wherein an opening (7) is formed in the side wall (6) whose horizontal cross section is curved outward, and a slide door (5) for opening and closing the opening (7) is formed along the outer surface of the side wall (6). It is mounted so as to be movable in the front and rear direction, and the slide door 5 is configured to be received by being pulled into the cab in the closed position, and the edge 6a of the side wall facing the opening 7 is in the cab. In order to overlap the circumferential edge portion 5b of the slide door 5 in the closed position, and the retaining means 19, 20, 21 separate the front lower window 9 from the opening. And a circumferential edge on the side of the opening 7 of the front lower window 9 so as to be positioned near the side wall circumferential edge portion 6a. Cab for the machine. 3. The holding means according to claim 1 or 2, wherein the holding means includes brackets (19, 20) for supporting the lower end of the front lower window (9), and locking means (21) for restraining the movement of the front lower window (9). Cab for construction machinery, characterized in that it has a). 4. The cab for a construction machine according to any one of claims 1 to 3, wherein the holding means has guide means (20b) for guiding the front lower window (9) to a holding position.