JPH11217849A - Construction equipment with driver's cab - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve habitability in a driver's cab by preventing large shaking of a cab by vibration of the frame side. SOLUTION: A vibrationproof mount 12 is composed of cylindrical laminated rubbers 13, etc., in which rigidity to vibrations in the vertical direction are increased and rigidity to vibrations in the horizontal direction are reduced. Accordingly, even when vibrations in the longitudinal direction or the horizontal direction are generated on the bed frame side, the transmission of vibrations to the cab can be inhibited by deflecting the laminated rubbers 13 in the horizontal direction, the large shaking of the pitching, rolling, etc., of the cab is obviated and habitability in the driver's cab can be improved. The cab can be supported by a large supporting area by forming the laminated rubbers 13 in a cylindrical shape, and a translational motion can be conducted smoothly to the cab.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction machine with an operator's cab, such as a hydraulic shovel and a hydraulic crane, and more particularly to an operator's cab in which a cab defining an operator's cab is supported on a frame of the construction machine in an anti-vibration state. With construction machinery.

[0002]

2. Description of the Related Art Generally, as a construction machine with an operator's cab such as a hydraulic shovel or a hydraulic crane, a support plate provided on a frame of the construction machine and an operator's cab provided on the support plate of the frame are defined. A cab and a plurality of anti-vibration mounts provided between the support plate of the frame and the cab and elastically supporting the cab with respect to the frame are known (for example, Japanese Patent Application Laid-Open No. 5-1).
No. 25745).

In this type of construction machine with a cab according to the prior art, a liquid-filled rubber mount is provided at each of the four corners of the cab floor plate as an anti-vibration mount, and the cab is mounted on a frame by each liquid-filled rubber mount. It is configured to be supported in a vibration-proof state.

In the construction machine with a cab according to the prior art constructed as described above, when the frame vibrates due to vibration generated during traveling, vibration caused by excavation reaction force generated during excavation work of earth and sand, etc., the vibration is transmitted to a liquid-filled type. The vibration is absorbed by the vertical deflection of the rubber mount, and the transmission of these vibrations to the cab is suppressed. Thereby, the livability of the operator in the cab is improved, and the operability of the operation lever and the like is improved.

[0005] Among hydraulic excavators, large excavators used for excavating a large amount of earth and sand, such as open pit mining in mines, waste a great deal of time for repair work in the event of a breakdown, resulting in reduced productivity. In order to avoid the problem, it usually tends to give priority to improving the durability of the machine rather than improving the livability in the cab, and at present, sufficient consideration is not given to livability in the cab.

In particular, in a high-mount cab type hydraulic excavator in which a bed frame extending in the vertical direction is provided on a main frame constituting a bottom portion of a revolving structure, and a cab is provided on the bed frame, the bed frame is connected to the bed frame. The cab is largely separated upward from the traveling body by the amount provided, and vibration during traveling or excavation work is transmitted to the cab through the bed frame, causing a problem that the cab vibrates greatly.

In a large hydraulic excavator, horizontal excavation work is often performed using a loader bucket.
Vibration in the front-rear direction or the left-right direction (horizontal direction) is easily transmitted to the cab during excavation work.

[0008]

However, in the construction machine with a cab according to the prior art described above, a liquid-filled rubber mount is used as an anti-vibration mount. The vibrations are absorbed by reducing the rigidity of the motor, and the rigidity in the horizontal direction (front-back direction, left-right direction) is increased.

For this reason, when vibrations in the front-back direction occur in the bed frame during excavation work, the anti-vibration mount cannot absorb the front-back vibrations because the mount has high rigidity against horizontal vibrations. For example, as shown in FIG.
When the cab 102 vibrates in the
As shown by arrow B on FIG. 01, large swinging due to swinging (pitching) in the front-rear direction occurs, which causes a problem that the cab 102 is deteriorated in comfort and the operability of the operating lever and the like is reduced. Further, when the bed frame 101 vibrates in the left-right direction, there is a problem that the cab 102 is largely shaken by the right-left swing (rolling).

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to prevent the cab from shaking greatly due to the vibration on the frame side, thereby improving the livability in the cab. A construction machine with a driver's cab is provided.

[0011]

A construction machine with a cab according to the present invention includes a support plate provided on a frame of a construction machine, a cab disposed on the support plate of the frame, and defining a cab. And a plurality of anti-vibration mounts provided between the support plate of the frame and the cab to elastically support the cab with respect to the frame.

Then, in order to solve the above-mentioned problem,
The feature of the configuration adopted by the invention of claim 1 is that each of the vibration isolation mounts has a hollow structure, and both ends in the axial direction are formed of cylindrical laminated rubber fixed to a support plate and a cab of the frame. Laminated rubber has the advantage of increasing rigidity against vertical vibrations and decreasing rigidity against horizontal vibrations.

With this structure, when the frame is vibrated in the front-rear direction or the left-right direction, the laminated rubber is largely bent in the horizontal direction in response to the vibration in the front-rear direction or the left-right direction, and the vibration is transmitted to the cab. To prevent In addition, since the vertical deformation of the cab is suppressed by the laminated rubber, the cab generates a translational motion displaced in parallel with the horizontal direction, thereby preventing large swaying due to pitching and rolling.

Further, by forming the laminated rubber into a cylindrical shape having a hollow structure, the cab can be stably supported with a large supporting area by the cylindrical laminated rubber, and the cab can be smoothly translated. Can be.

According to a second aspect of the present invention, an axial displacement restricting member is provided on the inner peripheral side of the cylindrical laminated rubber for restricting an axial tensile load from acting on the laminated rubber due to the upward displacement of the cab. It is in.

Thus, the axial displacement restricting member can be disposed by utilizing the space formed on the inner peripheral side of the cylindrical laminated rubber. When the cab is to be displaced upward, the axial displacement restricting member can restrict the tensile load from acting on the laminated rubber.

According to a third aspect of the present invention, the axial displacement restricting member is provided at the lower end side of the projecting body, the upper end side being fixed to the cab side, the lower end side projecting axially downward from the support plate of the frame. And a stopper for restricting the tensile load from acting on the laminated rubber.

With this configuration, when the cab is largely displaced upward with respect to the frame, the stopper provided on the lower end side of the protruding body restricts the tensile load from acting on the laminated rubber. be able to.

A feature of the structure adopted by the invention of claim 4 is that each of the vibration isolating mounts has a cylindrical upper side mounted in a state where an initial load in the compression direction is applied between the support plate of the frame and the cab. A laminated rubber, a protruding body whose upper end side is fixed to the cab, and whose lower end side penetrates the upper laminated rubber and the support plate in the axial direction and protrudes downward; and It is constituted by a cylindrical lower laminated rubber that is surrounded from the outside and is attached in a state where an initial load in the compression direction is applied between the support plate and the lower end side of the protrusion.

With this configuration, when the frame is vibrated in the front-rear direction or the left-right direction, the upper laminated rubber and the lower laminated rubber are largely bent in the horizontal direction with respect to the vibration in the front-rear direction or the left-right direction. Prevents vibration from being transmitted to the cab. In addition, since the upper and lower laminated rubbers suppress bending in the vertical direction, the cab generates a translational motion that is displaced in parallel in the horizontal direction, so that large swaying due to pitching and rolling is prevented. You.

Further, by forming the upper laminated rubber and the lower laminated rubber into a cylindrical shape having a hollow structure, the cab can be stably supported with a large supporting area by each of the cylindrical laminated rubbers. The cab can be smoothly translated.

Further, when the cab vibrates in the vertical direction, the compressive load on any one of the laminated rubbers becomes larger than that in the initial state, and the other laminated rubber only expands due to elasticity. Therefore, it is possible to restrict the tensile load from acting on the laminated rubber, and it is possible to prevent the laminated rubber from being damaged.

According to a fifth aspect of the present invention, a horizontal displacement restricting member for restricting the relative displacement of the cab in the horizontal direction with respect to the frame within a predetermined range is provided on the inner peripheral side of the laminated rubber. is there.

Accordingly, when the cab is largely displaced in the horizontal direction with respect to the frame, the displacement of the cab can be restricted by the horizontal displacement restricting member, and the excessive deflection of the laminated rubber due to the large displacement can be prevented. Can be prevented.

According to a sixth aspect of the present invention, the support plate of the frame is located on the inner peripheral side of the laminated rubber and surrounds the protruding body from the radial outside, so that the cab is largely displaced in the horizontal direction with respect to the frame. There is provided a horizontal displacement restricting member for restricting by contacting the protruding body.

Thus, the projecting body can be used as a mating member of the horizontal stopper. When the cab is largely displaced in the horizontal direction with respect to the frame, the horizontal stopper comes into contact with the protruding body to restrict the displacement of the cab, thereby preventing excessive bending of the laminated rubber due to the large displacement. be able to.

According to a seventh aspect of the present invention, an oil damper is provided between the frame and the cab so as to extend in the horizontal direction and connect the frame and the cab to attenuate the vibration of the cab.

With this configuration, when the laminated rubber that has been bent by the vibration of the cab generates residual vibration due to the elastic force at the time of restoration, the residual vibration can be attenuated by the oil damper. It is possible to suppress the resonance phenomenon due to the residual vibration. Moreover, since most of the vibration of the cab occurs in the horizontal direction, the horizontal vibration can be efficiently attenuated by the oil damper arranged to extend in the horizontal direction.

According to an eighth aspect of the present invention, the laminated rubber is constituted by a rubber cylinder in which a plurality of thin steel annular plates are arranged in parallel in multiple stages at a certain interval in the vertical direction.

Thus, for vertical vibration,
The rigidity can be increased by the thin steel annular plates, and the rubber cylinder between the thin steel annular plates can be deformed to reduce the rigidity and largely bend against horizontal vibration.

According to a ninth aspect of the present invention, the frame is a main frame constituting the bottom of the revolving structure, and the cab is supported on the main frame via each anti-vibration mount.

[0032] With this configuration, when the main frame vibrates during traveling or excavation work, transmission of the vibration of the main frame to the cab can be suppressed by each anti-vibration mount.

According to a tenth aspect of the present invention, the frame comprises a main frame constituting a bottom portion of the revolving structure, and a bed frame provided on the main frame so as to extend in the vertical direction. To support on the bed frame.

With this configuration, the transmission of vibration of the frame to the cab through the bed frame can be suppressed by the respective vibration-proof mounts, and the cab can be prevented from vibrating greatly on the bed frame.

[0035]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As a construction machine with a cab according to an embodiment of the present invention, a large-sized excavator called a high-cab type excavator will be described below in detail with reference to FIGS.

First, FIG. 1 to FIG. 8 show a first embodiment of the present invention.
Is an upper revolving structure that is rotatably mounted on the lower traveling structure 1. The upper revolving structure 2 includes a main frame 3 that forms the bottom of the upper revolving structure 2, and a machine room 4 that is provided on the main frame 3. A bed frame 5 provided on the front side of the main frame 3, an operator's cab 6 mounted on the bed frame 5 and surrounded by a cab 9 described later, and a rear side of the machine room 4. And a counter weight 7 attached to the rear of the main frame 3.
At the front of the main frame 3, a loader bucket type working device 8 for excavating earth and sand is attached so as to be able to move up and down.

Here, the bed frame 5 is provided on the main frame 3 so as to extend in the vertical direction.
As shown in the figure, the upper portion is formed in a box shape with an opening, and the opening side has a frame plate-like driver's cab installation plate 5 as a support plate.
A is fixed so as to be substantially horizontal. Also,
In the driver's cab installation plate 5A, through holes 5B are formed at four corners and through which a spacer cylinder 17 of the anti-vibration mount 12, which will be described later, penetrates. As shown in FIG. Mounting bracket 5 to which oil dampers 23 and 25 to be described later are mounted at four positions, that is, a position and a front and rear position on the left side.
C, 5C,... Are fixed.

Reference numeral 9 denotes a cab provided on the bed frame 5 and defining an operation cab 6 therein. The cab 9 is formed by, for example, pressing a thin steel plate and welding each part to form an upper surface 9A. The front part 9B, the rear part 9C, and the left and right side parts 9D, 9D (only one is shown) are formed in a box shape, and floor plate brackets 9E, 9E are provided on the lower surface side. A floor plate 10 is mounted on each of the floor plate brackets 9E, and a mounting bracket 10A on the lower surface side of which the oil dampers 23 and 25 are mounted corresponding to the mounting bracket 5C on the bed frame 5 side.
Is provided.

Further, a thick disk-shaped mounting seat 11 (only one is shown in FIG. 5) is fixed to the lower surface side of the floor plate 10 by fixing means such as welding. A screw hole 11A is formed corresponding to each through hole 5B of the driver's cab installation plate 5A, into which a screw portion 18A of a fixing bolt 18 described later is screwed. Further, inside the cab 9, a seat on which an operator sits, an operation lever for operating the working device 8, and the like (none of them are shown) are arranged.

Reference numerals 12, 12,... Denote anti-vibration mounts located between the floor panel 10 of the cab 9 and the bed frame 5 and disposed at four corners of the floor panel 10, respectively.
It is composed of a laminated rubber 13, a lower flange 14, an upper flange 16, a spacer cylinder 17, an axial stopper 20, a horizontal stopper 21, and the like, which will be described later.

Reference numeral 13 denotes a driver's cab installation plate 5 of the bed frame 5.
As shown in FIG. 6, the laminated rubber 13 includes a rubber cylinder 13A made of an elastic rubber material and a rubber cylinder 13A. A thin steel annular disk 13B as a thin steel annular plate buried in multiple stages parallel to each other in the vertical direction at a certain interval
13B,... And laminated rubber 1
3, the lower end of the rubber cylinder 13A is fixed to the lower flange 14 and the upper end thereof is fixed to the upper flange 16 by means of integral molding, adhesion, welding or the like.

Here, the laminated rubber 13 elastically supports the cab 9 on the bed frame 5 with a large rigidity against vertical vibrations (load) by the thin steel annular disks 13B. I have. Further, the rigidity of the laminated rubber 13 against vibration in the horizontal direction (front-back direction, left-right direction) is reduced by bending the rubber cylinder 13A between the thin steel annular disks 13B. Further, by forming the laminated rubber 13 in a cylindrical shape, the cab 9 can be supported with a large supporting area, so that the cab 9 swings in the front-rear direction (hereinafter referred to as pitching) and swings in the left-right direction. (Hereinafter referred to as rolling), vertical displacement (hereinafter referred to as bounce)
Cab 9 can be stably supported. When the cab 9 vibrates with respect to the bed frame 5, the vibration is converted into a horizontal translational motion, and the occurrence of pitching, rolling, and the like can be suppressed.

Numeral 14 denotes a cab installation plate 5 of the bed frame 5.
The lower flange 14 is attached to the A side, and the lower flange 14 is slightly smaller than the inner diameter of the laminated rubber 13 at the center thereof, and has an insertion hole having substantially the same diameter as the through hole 5B of the cab installation plate 5A. It is formed as a substantially rhombic plate having 14A. The lower flange 14 is fixed to the driver's cab installation plate 5A by two bolts 15, 15, and the laminated rubber 13 is integrally fixed to the upper surface thereof.

Reference numeral 16 denotes an upper flange mounted on the cab 9 side. The upper flange 16 is formed in a disk shape having an outer dimension slightly larger than the outer diameter of the laminated rubber 13 and has an inner peripheral side. A cylindrical portion 16A is formed so as to protrude downward, and a laminated rubber 13 is integrally fixed to the lower surface side.

Here, the inner diameter of the cylindrical portion 16A is set corresponding to the reduced diameter step portion 17A of the spacer tube 17, whereby the spacer tube 17 is fixed to the cab 9 side by fixing bolts 18. Sometimes, the reduced diameter step 17
It is fixed in a state sandwiched between A and the mounting seat 11.

The cylindrical portion 16A has a function of guiding the reduced-diameter step portion 17A of the spacer cylinder 17 so that it can be easily inserted at the time of assembly. Moreover, when the step 17A of the reduced diameter of the spacer cylinder 17 is inserted into the cylindrical part 16A, the end face of the spacer cylinder 17 abuts against the cylindrical part 16A,
In the state where the reduced diameter step portion 17A is not inserted into A, that is, in the state where the assembly failure occurs, the spacer tube 17, the fixing bolt 18 and the like are moved by the axial dimension of the cylindrical portion 16A to the cab installation plate 5A. Can protrude greatly downward.

Reference numeral 17 denotes a spacer cylinder as a protruding body which is provided on the inner peripheral side of the laminated rubber 13 and extends in the vertical direction.
A is formed, and the cylindrical portion 16A of the upper flange 16 is fitted to the reduced diameter step portion 17A. 18 is a spacer cylinder 17
The fixing bolt 18 has a threaded portion 18A on the tip side screwed into a screw hole 11A of the mounting seat 11.

When the spacer tube 17 is mounted on the cab 9 side, the reduced-diameter stepped portion 17A is connected to the upper flange 1
6 into the cylindrical portion 16A, and in this state, the fixing bolt 1
8 is screwed into the screw hole 11A of the mounting seat 11, and a nut 19 is screwed to the tip of the screw portion 18A. As a result, the spacer cylinder 17 is fixed to the cab 9 side, and the laminated rubber 13 is transferred to the cab 9 via the upper flange 16.
To the positioning position on the side. Further, the spacer cylinder 17
Has a function of adjusting the vertical position of the axial stopper 20 attached to the lower end protruding from the driver's cab installation plate 5A by adjusting its axial dimension.

Reference numeral 20 denotes an axial stopper which is located below the operator's cab installation plate 5A and is attached to the lower end of the spacer cylinder 17 and constitutes an axial displacement restricting member together with the spacer cylinder 17 and the like. 20 is a driver's cab installation plate 5A
Is formed of a high-strength disc body having a diameter larger than that of the through hole 5B.

The axial stopper 20 is provided with a gap S1 between the cab installation plate 5A and the cab 9
When it is attempted to make a large upward displacement, the outer peripheral side is brought into contact with the driver's cab installation plate 5A from below, and the laminated rubber 13
To prevent an excessive tensile load from acting on the surface.
Further, the axial stopper 20 has a function of holding the cab 9 on the bed frame 5 in a retaining state when the laminated rubber 13 is damaged due to aging or the like.

Reference numeral 21 denotes a horizontal stopper serving as a horizontal displacement restricting member. The horizontal stopper 21 is formed as a plate body similar to the lower flange 14, and a laminated rubber is provided on the inner peripheral side of the horizontal stopper 21. A stopper cylinder 21A having a predetermined gap S2 is provided on the outer peripheral side of the spacer cylinder 17 and protrudes upward. An annular buffer rubber 22 made of an elastic rubber material is fixed to the inner peripheral surface of the stopper cylinder 21A, and the inner peripheral surface of the buffer rubber 22 projects in a triangular cross section.
The shock when it comes into contact with 7 is reduced.

The horizontal stopper 21 is provided between the stopper cylinder 21A and the spacer cylinder 17 to provide the laminated rubber 13
7, the maximum displacement width when displacing in the horizontal direction is restricted within the range of the gap S2. This allows
When the laminated rubber 13 is going to be excessively bent by the large vibration of the cab 9, the stopper tube 21A is brought into contact with the spacer tube 17 to restrict the vibration of the cab 9. In addition, the shock when the stopper tube 21 </ b> A and the spacer tube 17 come into contact with each other is reduced by the cushioning rubber 22.

Reference numerals 23, 23 denote two first oil dampers provided between the floor plate 10 on the cab 9 side and the bed frame 5, and each of the first oil dampers 23 has, as shown in FIG. 23A, a piston (not shown) is slidably inserted into the tube 23A, a piston rod 23B having a proximal end connected to the piston in the tube 23A and a distal end projecting from the tube 23A, and a proximal end of the tube 23A. A mounting eye 23C with a built-in rubber bush fixed to the side thereof and a mounting eye 23D with a built-in rubber bush fixed to the distal end side of the piston rod 23B.

Here, the first oil damper 23 is connected to the mounting bracket 5 of the bed frame 5 via a connecting pin 24 whose mounting eye 23C on the tube 23A side extends vertically.
A mounting eye 23D on the piston rod 23B side is mounted on the mounting bracket 10A of the floor plate 10 via the connecting pin 24 so as to be rotatable in the horizontal direction. The first oil damper 23
Is slightly rotatable in the vertical direction by a rubber bush incorporated in the mounting eyes 23C and 23D.

Each of the first oil dampers 23 is disposed on the left and right sides of the cab 9 so as to extend substantially horizontally in the front-rear direction, and connects the bed frame 5 and the cab 9 in the front-rear direction. Thereby, the first oil damper 2
Numeral 3 attenuates longitudinal vibrations generated in the cab 9.

Reference numerals 25, 25 denote two second oil dampers provided between the floor plate 10 on the cab 9 side and the bed frame 5, and each of the second oil dampers 25 is the first oil damper described above. 23, a tube 25A, a piston rod 25B, mounting eyes 25C, 25D, and the like.
A.

Then, the second oil dampers 25, 25
Are arranged so as to extend substantially horizontally in the left-right direction at positions before and after the cab 9, and connect the bed frame 5 and the cab 9 in the left-right direction. Thereby, the second oil damper 25 attenuates the left-right vibration generated in the cab 9.

The hydraulic shovel according to the present embodiment has the above-described configuration. Hereinafter, the vibration-proofing action between the bed frame 5 and the cab 9 which is a feature of the present embodiment will be described.

First, when the lower traveling body 1 is traveling or when the working device 8
For example, when the main frame 3 vibrates in the front-rear direction at the time of excavation work, the vibration is transmitted to the laminated rubber 13 of each anti-vibration mount 12 through the bed frame 5, and the lower side of the laminated rubber 13 is Move in the direction of arrow A in the middle.
However, since the laminated rubber 13 is formed with low rigidity and flexibility with respect to horizontal vibration, the vibration is allowed to some extent by bending in the direction of arrow A to generate shear deformation. be able to. As a result, the laminated rubber 13 prevents the vibration on the bed frame 5 side from being directly transmitted to the cab 9 side as shown in FIG. Side vibration can be kept small.

Even when the vibration in the front-rear direction is transmitted to the cab 9, the laminated rubber 13 is formed with high rigidity in the up-down direction and small rigidity in the front-rear direction and the left-right direction. The cab 9 can be supported in the vertical direction by the rubber 13 to prevent the cab 9 from swinging.

As described above, the cab 9 generates a translational movement that is displaced parallel to the front-rear direction in response to the vibration in the front-rear direction.
Similarly, when the bed frame 5 vibrates in the left-right direction, the cab 9 generates a translational movement displaced parallel to the left-right direction. As a result, the cab 9 is prevented from generating large swings such as pitching and rolling as in the prior art.

When large vibrations such as pitching, rolling, and bounce are generated in the cab 9, the axial stopper 20 suppresses the displacement of the cab 9 in the range of the gap S 1, and Prevents tensile loads from acting. In addition, even if the laminated rubber 13 is damaged due to aging or the like, the axial stopper 20
Can be engaged with the cab setting plate 5A of the bed frame 5, and the cab 9 can be held on the bed frame 5 in a retaining state.

Further, since the laminated rubber 13 is formed with low rigidity in the horizontal direction and flexibility, it tends to largely bend in the front-rear direction or the left-right direction depending on the magnitude of the vibration. However, in this case, the stopper cylinder 21A of the horizontal stopper 21 provided on the bed frame 5 side is used.
Is mounted on the spacer cylinder 17 provided on the cab 9 side.
2, the amount of bending of the laminated rubber 13 is restricted within the range of the gap S2, and excessive deformation of the laminated rubber 13 is prevented. Further, the shock when the stopper cylinder 21 </ b> A contacts the spacer cylinder 17 is reduced by the cushioning rubber 22.

On the other hand, after the vibration is absorbed by bending the laminated rubber 13, residual vibration is generated by the restoring force of the laminated rubber 13. However, between the bed frame 5 and the cab 9, a first oil damper 23 connecting the bed frame 5 and the cab 9 in the front-rear direction, and a second oil damper 23 connecting the bed frame 5 and the cab 9 in the left-right direction. The residual vibration at this time is attenuated by the oil dampers 23 and 25, and the resonance phenomenon due to the residual vibration is suppressed.

Therefore, according to the present embodiment, the anti-vibration mount 12 is made of the laminated rubber 13 or the like having high rigidity against vertical vibration and low rigidity against horizontal vibration. The rubber 13 can prevent the cab 9 from generating large swings such as pitching and rolling, and can improve the livability of the operator in the cab 6 and the operability of the operation lever and the like.

The laminated rubber 13 includes a rubber cylinder 13A,
The cab 9 is supported by the rubber cylinder 13A and each of the thin steel annular disks 13B, since the thin steel annular disks 13B are buried in the rubber cylinder 13A at predetermined intervals in parallel and vertically in multiple stages. The cab 9 can be translated in the front-rear direction for vibration in the front-rear direction, and the cab 9 can be translated in the left-right direction for vibration in the left-right direction. . Thereby, the riding comfort in the cab 6 can be improved.

Moreover, since the laminated rubber 13 is formed in a cylindrical shape, the cab 9 can be supported with a large supporting area by the cylindrical laminated rubber 13, and large swings such as pitching and rolling can be prevented. The cab 9 can be smoothly translated and the riding comfort can be further improved.

Further, since the laminated rubber 13 can be supported on the cab 9 side via the upper flange 16 by using the spacer cylinder 17 constituting the axial displacement regulating member, a bolt or the like for attaching the upper flange 16 can be used. Can be omitted, and assembling workability and the like can be improved.

The upper flange 16 has a cylindrical portion 16A.
Is provided, the reduced-diameter step 17A of the spacer tube 17 can be easily inserted at the time of assembling, and assembling workability can be improved. In addition, by extending the cylindrical portion 16A in the axial direction, if the spacer cylinder 17 is not properly assembled, the spacer cylinder 17, the fixing bolts 18 and the like are largely protruded downward from the cab installation plate 5A. This allows the worker to recognize the assembly failure, thereby improving workability and yield.

Further, when the cab 9 is largely displaced upward, the displacement of the cab 9 can be suppressed in the range of the gap S1 by bringing the axial stopper 20 into contact with the cab installation plate 5A. Accordingly, it is possible to prevent a tensile load from acting on the laminated rubber 13, and it is possible to hold the cab 9 on the bed frame 5 even if the laminated rubber 13 is damaged.

Even when the laminated rubber 13 is bent so as to cause a large shear deformation in the horizontal direction, the laminated rubber 13
Can be restricted in the range of the gap S2 by the horizontal stopper 21, so that the laminated rubber 13 can be prevented from being damaged due to excessive bending, and the life can be extended.

A buffer rubber 22 is fixed to the inner peripheral side of the stopper cylinder 21A of the horizontal stopper 21.
Since the impact at the time when A and the spacer cylinder 17 come into contact with each other can be reduced, it is possible to prevent collision noise, vibration, abnormal wear, breakage, and the like at this time. Moreover, since the inner peripheral side of the cushion rubber 22 has a triangular cross section, the impact at the time of contact can be further reduced.

On the other hand, a first oil damper 23 connecting the bed frame 5 and the cab 9 horizontally in the front-rear direction and a second oil damper 25 connecting the bed frame 5 and the cab 9 horizontally in the left-right direction are provided. Since the residual vibration due to the restoring force of the laminated rubber 13 can be attenuated by the use of 25, the resonance phenomenon due to the residual vibration can be suppressed, and the livability and the like of the cab 6 can be further improved.

Further, since the oil dampers 23 and 25 are mounted so as to be largely rotatable in the horizontal direction via the connecting pins 24 extending in the vertical direction, the bed frame 5 and the cab 9 are relatively displaced in the horizontal direction. In this case, the first oil damper 23 can be smoothly rotated in the left-right direction between the mounting eyes 23C and 23D and the connecting pin 24. When the bed frame 5 and the cab 9 are relatively displaced in the front-rear direction, the second oil damper 25 can be smoothly rotated in the front-rear direction between the mounting eyes 25C, 25D and the connecting pin 24. it can. Thereby, the laminated rubber 13 can be smoothly bent in the horizontal direction, and the cab 9 can be bent.
Can be efficiently suppressed. Further, it is possible to prevent an unreasonable load from acting on each of the oil dampers 23 and 25, and it is possible to extend the life of each of the oil dampers 23 and 25.

Next, FIGS. 9 and 10 show a second embodiment of the present invention. The feature of this embodiment is that the anti-vibration mount is constituted by upper laminated rubber, lower laminated rubber and the like. It is in. In the present embodiment, the same components as those in the above-described first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

Reference numeral 31 denotes an anti-vibration mount provided between the bed frame 5 and the cab 9 according to the present embodiment. The anti-vibration mount 31 includes an upper laminated rubber 32, lower flanges 33 and 38, and an upper It is composed of flanges 35 and 37, an initial load applying mechanism 39, a horizontal stopper 44, and the like.

Reference numeral 32 denotes a cab installation plate 5 of the bed frame 5.
The upper laminated rubber 32 is provided between A and the mounting seat 11 fixed to the floor plate 10, and the upper laminated rubber 32 is made of an elastic rubber material like the laminated rubber 13 according to the first embodiment. , And thin steel annular disks 32B, 32B,... Buried in the rubber cylinder 32A in parallel in multiple stages in the vertical direction at regular intervals.

Reference numeral 33 denotes a cab installation plate 5 of the bed frame 5.
The lower flange 33 is formed as a substantially rhombic plate having an insertion hole 33A similarly to the lower flange 14 according to the first embodiment. The lower flange 33 is fixed to the cab installation plate 5A by two bolts 34, 34, and the upper laminated rubber 32 is integrally fixed to the upper surface thereof.

Reference numeral 35 denotes an upper flange provided above the upper laminated rubber 32. The upper flange 35 has a cylindrical portion 35A facing downward on the inner peripheral side, substantially in the same manner as the upper flange 16 according to the first embodiment. Is formed in a disk shape protruding into
The upper laminated rubber 32 is integrally fixed to the lower surface side.
However, the upper flange 35 is different from the upper flange 16 according to the first embodiment in that the cylindrical portion 35A is vertically movable with respect to a spacer tube 40 described later.

Reference numeral 36 denotes a cab installation plate 5 of the bed frame 5.
A lower laminated rubber provided coaxially with the upper laminated rubber 32 on the lower surface side of A. The lower laminated rubber 36 is buried in the rubber cylinder 36A in the vertical direction in multiple stages, similarly to the upper laminated rubber 32 described above. Are formed from the thin steel annular disks 36B, 36B,...

Reference numeral 37 denotes a cab installation plate 5 of the bed frame 5.
The upper flange 33 is attached to the A side, and the upper flange 33 is similar to the lower flange 33 described above.
It is formed as a plate having 7A. The upper flange 37 is fixed to the driver's cab installation plate 5A by bolts 34, 34, and the lower laminated rubber 36 is integrally fixed to the lower surface thereof.

Reference numeral 38 denotes a lower flange provided below the lower laminated rubber 36. The lower flange 38 has a cylindrical portion 38A protruding upward on the inner peripheral side similarly to the upper flange 35 described above. The lower laminated rubber 36 is integrally fixed to the upper surface side.

An initial load applying mechanism 39 is mounted on the cab 9 side.
2, 36, a spacer cylinder 40 as a protruding body extending axially through the inner peripheral side of the cab installation plate 5A, and provided at the lower end side of the spacer cylinder 40 projecting downward from the lower laminated rubber 36, Pressing plate 41 in contact with the lower surface of lower flange 38
The pressing plate 41 is inserted into the spacer tube 40 from below, and the screw portion 42 </ b> A on the distal end side is screwed into the screw hole 11 of the mounting seat 11.
A, the pressing plate 41, the spacer tube 40
And a nut 43 screwed to the tip of a screw portion 42A of the fixing bolt 42.

The initial load applying mechanism 39 applies an initial load in the compression direction to the laminated rubbers 32 and 36 by sandwiching the laminated rubbers 32 and 36 between the mounting seat 11 and the pressing plate 41. is there. At this time, the laminated rubber 3
The magnitude of the initial load in the compression direction applied to 2, 36 is
By adjusting the axial dimension of the spacer cylinder 40, it can be changed appropriately.

Reference numeral 44 denotes a horizontal stopper provided on the bed frame 5 side according to the present embodiment. The horizontal stopper 44 is formed as a plate similar to the horizontal stopper 21 according to the first embodiment. On its inner circumference,
A stopper tube 44A is provided to project upward with a predetermined interval between the stopper tube 44A and the spacer tube 40. Stopper cylinder 4
An annular buffer rubber 45 made of an elastic rubber material is fixed to the inner peripheral surface of 4A, and the inner peripheral surface of the buffer rubber 45 has a triangular cross section.

Thus, the present embodiment having such a structure also has substantially the same operation and effect as those of the above-described first embodiment, and the case where the revolving frame 3 vibrates in the horizontal direction. 10, the vibration of the cab 9 can be suppressed by bending the respective laminated rubbers 32 and 36.

Further, in this embodiment, the upper laminated rubber 32 and the lower laminated rubber 36 are arranged with the cab setting plate 5A of the bed frame 5 interposed therebetween, and the initial load applying mechanism 39 attached to the cab 9 side is provided. An initial load in the compression direction is applied to the laminated rubbers 32 and 36.

Thus, when the cab 9 vibrates in the vertical direction, the laminated rubbers 32 and 36 only extend by the amount of the initial load, thereby preventing a tensile load from acting on the laminated rubbers 32 and 36. be able to. When a larger vibration acts on the laminated rubbers 32, 36, the upper flange 35 or the lower flange 38 slides in the axial direction, thereby preventing a tensile load from acting on the laminated rubbers 32, 36.

Therefore, according to the present embodiment, the cab 9
When the rubber vibrates greatly in the vertical direction, the laminated rubber 32,
Since it is possible to reliably prevent a tensile load from acting on the laminated rubber 36, the durability of the laminated rubbers 32 and 36 can be improved, and the life can be extended.

Next, FIG. 11 shows a third embodiment of the present invention. The feature of this embodiment is that the flanges provided on the upper and lower sides of the laminated rubber are constituted by two members. . In the present embodiment, the same components as those in the above-described first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

Reference numeral 51 denotes an anti-vibration mount according to the present embodiment,
Reference numeral 52 denotes a lower flange provided below the laminated rubber 13. The lower flange 52 has a flange main body 53 integrally fixed to the lower end surface of the laminated rubber 13 and an outer peripheral side of the flange main body 53. And a flange holding plate 54 provided. The flange holding plate 54
A step portion 54A for fixing the outer peripheral edge of the flange main body 53 in a positioned state is formed on the inner peripheral side of the main body.
A.

Reference numeral 55 denotes an upper flange provided on the upper side of the laminated rubber 13.
A flange body 56 integrally fixed to the upper end surface of the flange body, and a flange pressing plate 57 provided on the inner peripheral side of the flange main body 56. A step portion 57A for fixing the inner peripheral edge of the positioning member 56 in a positioning state is formed.

Reference numeral 58 denotes a spacer cylinder as a protrusion according to the present embodiment. The spacer cylinder 58 is different from the spacer cylinder 17 according to the first embodiment in the upper flange 5.
The axial dimension is reduced by the thickness of the flange holding plate 57 of No. 5. The spacer cylinder 58 fixes the flange holding plate 57 between the mounting seat 11 and the flange holding plate 57.

Thus, also in the present embodiment configured as described above, it is possible to obtain substantially the same operation and effect as those of the first embodiment.

In this embodiment, however, the lower flange 52 and the upper flange 55 are composed of two members, namely, the flange main bodies 53 and 56 and the flange pressing plates 54 and 57, so that a plurality of flange pressing plates 54 and 57 are provided. By preparing the types, it is possible to select and attach another laminated rubber 13 to which the flange main bodies 53 and 56 are fixed. Thereby, various laminated rubbers can be used as general-purpose products,
Cost can be reduced.

Next, FIGS. 12 and 13 show a fourth embodiment of the present invention. The feature of this embodiment is that a vibration isolating mount is provided on a main frame constituting the bottom of a revolving structure. He supported the cab. In the present embodiment, the same components as those in the above-described first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

Reference numeral 61 denotes a main frame applied to the present embodiment. The main frame 61 has a center frame 62 attached to a turning device (not shown). Instead of the bed frame 5 according to the first embodiment, a cab support 63 for supporting the cab 9 from below is provided.

The center frame 62 includes a bottom plate 62A made of a thick steel plate and a pair of vertical plates 62B (only one is shown) extending on the bottom plate 62A in the front-rear direction.

Further, the cab support 63 is provided with a cross-shaped U-shaped cross beam 6 extending in the left-right direction from the front portion of the center frame 62.
3A, a rear frame 63B located on the rear side of the horizontal beam 63A and extending in the left-right direction, and a left side frame 63C connected to the left ends of the horizontal beam 63A and the rear frame 63B and extending in the front-rear direction.
A right side frame 63D extending in the front-rear direction parallel to the side frame 63C from the right end side of the cross beam 63A, and a front frame 63E having an L-shaped cross section connecting the front ends of the side frames 63C and 63D in the left-right direction. It is roughly configured.

The front frame 6 is provided at the front of the cab support 63.
Front support plate 6 extending in the left-right direction facing 3E
4 is provided, and a rear frame 63B is provided at a rear portion of the cab support portion 63.
A rear support plate 65 is provided to extend in the left-right direction so as to face the front side. Then, the support plate 64 and the cab 9
Two anti-vibration mounts 12 are provided between the floor plate 10 and the support plate 65 and the cab 9.
Two anti-vibration mounts 12 are provided apart from the floor plate 10 in the left-right direction, and the cab 9 is elastically mounted on the main frame 61 via the four anti-vibration mounts 12. The configuration is supported.

Are fixedly provided on the upper surface of the front support plate 64. The mounting bracket 64A and the mounting bracket 10A fixed to the lower surface of the floor plate 10 of the cab 9 are provided. Between them, two oil dampers 23, 23 for attenuating vibration in the front-rear direction of the cab 9 and one oil damper 25 for attenuating vibration in the left-right direction of the cab 9 are provided. One mounting bracket 65A is fixedly provided on the upper surface of the rear support plate 65, and the mounting bracket 65A and the mounting bracket 10
1A that attenuates the vibration of the cab 9 in the left-right direction.
An oil damper 25 is provided.

Thus, also in the present embodiment configured as described above, when the main frame 61 vibrates in the front-rear direction or the left-right direction (horizontal direction), the laminated rubber 13 of the anti-vibration mount 12 is connected to the main frame 61. By flexing the cab 9 with the floor plate 10 in the horizontal direction, the vibration of the main frame 61 is prevented from being directly transmitted to the cab 9, and the vibration of the cab 9 can be suppressed.

Moreover, the laminated rubber 13 of the anti-vibration mount 12
Since the cab 9 is formed to have high rigidity in the vertical direction and small rigidity in the horizontal direction, the cab 9 generates a translational movement displaced parallel to the horizontal direction. For this reason, it is possible to suppress the cab 9 from pitching or rolling, and to prevent the cab 9 from shaking greatly, thereby improving the livability in the cab 9,
Operability of the operation lever and the like can be improved.

When the cab 9 translates in the horizontal direction due to the vibration of the main frame 61, the laminated rubber 1
Even if the cab 9 generates residual vibration in the horizontal direction due to the restoring force of 3, the oil damper 23 that attenuates the vibration of the cab 9 in the front-rear direction and the vibration in the left-right direction are provided between the main frame 61 and the cab 9. Since the damping oil damper 25 is provided, the residual vibration of the cab 9 can be damped by the oil dampers 24 and 25, and the resonance phenomenon due to the residual vibration can be suppressed.

In the first embodiment, the spacer cylinder 17 attached to the cab 9 by the fixing bolt 18 is used.
Although the case where the laminated rubber 13 is supported on the cab 9 side via the upper flange 16 using the upper flange 16 has been exemplified, the present invention is not limited to this. For example, as shown by a two-dot chain line in FIG. 16 may be fixed to the mounting seat 11 on the cab 9 side by bolts 61, 61.

In each embodiment, the laminated rubber 13,
Although the case where 32 and 36 are formed in a cylindrical shape has been described as an example, the present invention is not limited to this. For example, the laminated rubber is formed as another cylindrical body such as an elliptic cylinder, a long cylinder, and a square cylinder. Is also good.

In each of the embodiments, the cushioning rubber 2 is attached to the stopper cylinders 21A, 44A of the horizontal stoppers 21, 44.
Although the case where 2, 45 is provided is illustrated, a configuration in which a cushion rubber is fixedly provided to the spacer cylinders 17, 40, 58 may be used instead.

In each embodiment, the case where two first oil dampers 23 and two second oil dampers 25 are provided is exemplified. However, one first oil damper and one second oil damper are provided. Alternatively, three or more may be provided.

Further, in each embodiment, the hydraulic shovel has been described as an example of a construction machine with a cab. However, the present invention is not limited to this, and the construction machine with another cab such as a wheel loader or a hydraulic crane may be used. It can also be applied to machines.

[0110]

As described above in detail, according to the first aspect of the present invention, when the frame is vibrated in the front-rear direction or the left-right direction, the laminated rubber is protected against the front-rear direction or the left-right vibration. The large deflection in the horizontal direction can prevent transmission of vibration to the cab. Also,
Vertical deflection can be suppressed by the laminated rubber, and the cab can be translated in the horizontal direction.
Thus, it is possible to prevent large swaying such as pitching and rolling from occurring in the cab, and it is possible to improve the livability of the operator in the cab, the operability of the operation lever, and the like.

Further, by forming the laminated rubber into a cylindrical shape having a hollow structure, the cab can be stably supported with a large supporting area by the cylindrical laminated rubber, so that the cab can be smoothly translated. Therefore, the ride comfort can be further improved.

According to the second aspect of the present invention, the axial displacement restricting member can be provided by utilizing the space formed on the inner peripheral side of the cylindrical laminated rubber, and the installation space for the vibration isolating mount is effectively used. And the whole can be miniaturized. When the cab is to be displaced upward, it is possible to restrict the tensile load from acting on the laminated rubber by the axial displacement restricting member, and it is possible to improve the durability of the laminated rubber.

According to the third aspect of the invention, when the cab is largely displaced upward with respect to the frame,
The stopper provided on the lower end side of the protruding body can restrict the tensile load from acting on the laminated rubber. Thereby, the laminated rubber can be prevented from being damaged, the durability can be improved, and even if the laminated rubber is damaged, the cab can be held on the frame, and the reliability can be improved. it can.

According to the fourth aspect of the present invention, when vibration in the front-rear direction or left-right direction occurs in the frame, the upper laminated rubber and the lower laminated rubber are moved in the horizontal direction in response to the front-rear or left-right vibration. The vibration can be prevented from being transmitted to the cab. Further, the upper laminated rubber and the lower laminated rubber can suppress bending in the vertical direction, and can translate the cab in the horizontal direction. Thus, it is possible to prevent large swaying such as pitching and rolling from occurring in the cab, and it is possible to improve the livability of the operator in the cab, the operability of the operation lever, and the like.

Further, by forming the upper laminated rubber and the lower laminated rubber into a hollow cylindrical shape, the cab can be stably supported with a large supporting area by these cylindrical laminated rubbers. The cab can be smoothly translated to further improve the riding comfort.

On the other hand, when the cab vibrates in the vertical direction, the compressive load on any one of the laminated rubbers becomes larger than that in the initial state, and the other laminated rubber only expands due to elasticity. Therefore, it is possible to restrict the tensile load from acting on the laminated rubber, prevent the laminated rubber from being damaged, and improve the reliability.

According to the fifth aspect of the present invention, when the cab is largely displaced in the horizontal direction with respect to the frame, the displacement of the cab can be regulated by the horizontal displacement regulating member. Excessive bending of the laminated rubber can be prevented, damage to the laminated rubber can be prevented, and the life can be extended.

According to the invention of claim 6, the protruding body can be used as a counterpart member of the horizontal displacement regulating member, and the configuration can be simplified. In addition, when the cab is to be displaced largely in the horizontal direction with respect to the frame, the displacement of the cab can be regulated by contacting the horizontal displacement regulating member with the protruding body. Excessive bending can be prevented, and damage to the laminated rubber can be prevented, thereby extending the life.

According to the seventh aspect of the present invention, when the laminated rubber that has been bent by the vibration of the cab generates residual vibration due to the elastic force at the time of restoration, the residual vibration is attenuated by the oil damper. Therefore, the resonance phenomenon due to the residual vibration can be suppressed, and the livability in the cab can be improved. Moreover, since most of the cab vibrations occur in the horizontal direction, the horizontal vibrations can be efficiently attenuated by the oil dampers disposed so as to extend in the horizontal direction, and the riding comfort can be further improved.

According to the eighth aspect of the present invention, the rigidity can be increased by the thin steel annular plates against vertical vibrations, and the thin steel annular plates can be improved against horizontal vibrations. By deforming the rubber cylinder between the plates, the rigidity can be reduced and the flexure can be largely bent, and the cab can be translated in the horizontal direction to improve the livability.

According to the ninth aspect of the present invention, since the cab is supported on the main frame constituting the bottom of the revolving structure via the anti-vibration mount, when the main frame vibrates during traveling or excavation work. In addition, the transmission of the vibration of the main frame to the cab can be suppressed by the anti-vibration mount.

According to the tenth aspect of the present invention, the cab is supported on the bed frame provided on the main frame via the anti-vibration mount. Even if the bed frame vibrates greatly, the vibration of the bed frame is transmitted to the cab by the anti-vibration mount, and even in the case of a large construction machine with a cab mounted on the bed frame, the comfort in the cab Improve
Operability of the operation lever and the like can be improved.

[Brief description of the drawings]

FIG. 1 is an overall view showing a loader bucket type large-sized hydraulic excavator according to a first embodiment of the present invention.

FIG. 2 is a partially broken external view showing an anti-vibration mount and a first oil damper according to the first embodiment together with a bed frame and a cab.

FIG. 3 is a cross-sectional view showing an anti-vibration mount, a first oil damper, a second oil damper, and the like, as viewed from a direction indicated by arrows III-III in FIG.

FIG. 4 is an enlarged sectional view of an essential part showing an oil damper in an enlarged manner.

FIG. 5 is an enlarged vertical cross-sectional view of the anti-vibration mount.

6 is a cross-sectional view of the anti-vibration mount shown in FIG. 5 as seen from the direction of arrows VI-VI.

FIG. 7 is a longitudinal sectional view showing a state in which the laminated rubber of the vibration isolation mount is bent in the horizontal direction, as viewed from the same position as in FIG. 5;

FIG. 8 is an operation explanatory view showing a state in which the bed frame vibrates in the front-back direction.

FIG. 9 is a longitudinal sectional view of the anti-vibration mount according to the second embodiment viewed from the same position as in FIG.

FIG. 10 is a longitudinal sectional view showing a state in which an upper laminated rubber and a lower laminated rubber of the vibration isolating mount are bent in a horizontal direction.

FIG. 11 shows an anti-vibration mount according to the third embodiment shown in FIG.
It is the longitudinal cross-sectional view seen from the same position as (1).

FIG. 12 shows an anti-vibration mount according to a fourth embodiment,
FIG. 2 is a partially broken external view showing the oil damper of FIG.

FIG. 13 is a cross-sectional view showing the anti-vibration mount, the first oil damper, the second oil damper, and the like, as viewed from the direction indicated by arrows XIII-XIII in FIG.

FIG. 14 is an operation explanatory view showing a state in which pitching has occurred in a cab according to a conventional technique.

[Explanation of symbols]

2 Upper revolving superstructure (construction equipment) 3,61 Main frame 5 Bed frame 5A Operator cab installation plate (support plate) 6 Operator cab 9 Cab 12,31,51 Anti-vibration mount 13 Laminated rubber 13A, 32A, 36A Rubber cylinder 13B, 32B, 36B Thin steel annular disk (thin steel annular plate) 17, 40, 58 Spacer cylinder (projecting body) 20 Axial stopper (axial displacement control member) 21, 44 Horizontal stopper (horizontal displacement control member) 23 First oil damper 25 Second oil damper 32 Upper laminated rubber 36 Lower laminated rubber 64, 65 Support plate

Claims (10)

[Claims] 1. A support plate provided on a frame of a construction machine, a cab provided on the support plate of the frame to define a cab, and a cab provided between the support plate and the cab of the frame. In a construction machine with a cab comprising a plurality of anti-vibration mounts for elastically supporting a cab with respect to a frame, each of the anti-vibration mounts has a hollow structure, and both ends in the axial direction are provided with a support plate of the frame and a cab. A construction machine with an operator's cab, wherein the construction is such that the rigidity against vertical vibrations is increased and the rigidity against horizontal vibrations is reduced. . 2. An inner peripheral side of the cylindrical laminated rubber,
2. The construction machine with a cab according to claim 1, further comprising: an axial displacement restricting member that restricts an axial tensile load from acting on the laminated rubber due to an upward displacement of the cab. 3. 3. The axial displacement restricting member has an upper end fixed to the cab side, a lower end provided at a lower end side of the protruding body, and a lower end side projecting axially downward from a support plate of the frame. A stopper for restricting a tensile load from acting on the laminated rubber.
4. A construction machine with a cab according to claim 1. 4. A support plate provided on a frame of a construction machine, a cab provided on the support plate of the frame to define a driver's cab, and provided between the support plate and the cab of the frame. In a construction machine with a cab, comprising a plurality of anti-vibration mounts for elastically supporting a cab with respect to a frame, each of the anti-vibration mounts is provided between a support plate of the frame and a cab in an initial compression direction. A cylindrical upper laminated rubber that is attached in a state where a load is applied, an upper end fixed to the cab, and a lower end penetrating the upper laminated rubber and the support plate in the axial direction and projecting downward; A state in which an initial load in the compression direction is applied between the support plate and the lower end side of the projecting member, which is located below the plate and surrounds the projecting member from the radial outside. Cab with a construction machine, characterized by being configured and a tubular lower laminated rubber mounted. 5. A horizontal displacement restricting member for restricting a relative displacement of the cab relative to a frame in a horizontal direction within a certain range is provided on an inner peripheral side of the laminated rubber. The construction machine with a cab according to 2, 3, or 4. 6. The support plate of the frame, which is located on the inner peripheral side of the laminated rubber and surrounds the protruding body from the outside in the radial direction, to prevent the cab from being largely displaced in the horizontal direction with respect to the frame. 5. The construction machine with a driver's cab according to 2, 3, or 4, further comprising a horizontal displacement restricting member that restricts by contacting the protrusion. 7. An oil damper is provided between the frame and the cab to extend in the horizontal direction and connect the frame and the cab to attenuate vibration of the cab.
7. The construction machine with a cab according to 2, 3, 4, 5 or 6. 8. The laminated rubber is constituted by a rubber cylinder in which a plurality of thin steel annular plates are arranged in parallel in multiple stages at regular intervals in a vertical direction. Or the construction machine with a cab according to 7. 9. The frame according to claim 1, wherein said frame is a main frame constituting a bottom portion of said revolving structure, and said cab is supported on said main frame via said anti-vibration mounts. The construction machine with a cab according to 4, 5, 6, 7 or 8. 10. The frame comprises a main frame constituting a bottom of a revolving structure, and a bed frame provided on the main frame so as to extend in a vertical direction, and the cab is provided via the respective vibration-proof mounts. 5. The apparatus according to claim 1, wherein said supporting member is supported on said bed frame.
9. The construction machine with a cab according to 5, 6, 7, or 8.