JPH10292434A - Work machine with driver's cab - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sharply increase the strength of the whole by increasing the rigidity of a driver's cab main body against a lateral load or the like. SOLUTION: Rubber mounts 30 are arranged at the positions nearly directly below stanchions 26-29 at four comers of a driver's cab main body 24, and the driver's cab main body 24 is elastically supported on the support sections of a rotary frame via the rubber mounts 30. Fixing bolts 32 are fastened to a floor board 25 side at the center positions in the hollow stanchions 26-29 respectively, and displacement regulating plates 34-37 are arranged in the hollow stanchions 26-29 at an interval in the vertical direction. Rod sections extended upward from the male screw sections of the fixing bolts 32 are arranged inside the notch sections 34A-37A provided on the displacement regulating plates 34-37 via slight gaps.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working machine with a cab, such as a hydraulic shovel, and more particularly, to a working machine with a cab that reduces vibration transmitted from a frame of the working machine to the cab.

[0002]

2. Description of the Related Art FIGS. 6 to 12 show a hydraulic shovel as an example of a working machine with a cab according to the prior art.

[0003] In the drawings, reference numeral 1 denotes a lower traveling body, and 2 denotes an upper revolving body which is rotatably provided on the lower traveling body 1. A swing frame 4 provided so as to be able to swing, a machine room 5 provided on the swing frame 4 and housing an engine, a hydraulic pump (both not shown) and the like, and a rear side of the machine room 5 A counter weight 6 is provided at a rear portion of the turning frame 4 and an operator cab 7 is provided at a front left portion of the turning frame 4 and includes an operator cab body 12 and the like described later. In the center of the front part of the revolving frame 4, a working device 8 for excavating soil and the like is provided so as to be able to move up and down.

Here, the turning frame 4 is shown in FIGS.
As shown in FIG. 1, a central portion constituting a connecting portion with the turning device 3 is a center frame 9 made of a thick steel plate or the like. A supporting portion 10 is provided. Further, the support portion 10 includes two cross beams 10A, 1 each having a substantially U-shaped cross-sectional shape extending in the left and right directions while being separated from the front and the rear.
0B, a side frame 10C composed of a side frame connecting the left ends of the cross beams 10A and 10B in the front and rear directions, and protruding forward from the cross beam 10A and moving forward and rearward in parallel with the side frame 10C. It is roughly composed of an extending vertical beam portion 10D, a front frame portion 10E, etc., which is located on the front side of the horizontal beam portion 10A and connects the side frame portion 10C and the vertical beam portion 10D in the left and right directions.

[0005] Further, the support portion 10 has a cross beam portion 10.
Left and right front brackets 11A and 11B are provided between A and the side frame portion 10C and between the cross beam portion 10A and the vertical beam portion 10D, respectively, and the cross beam portion 10B is provided.
Left and right rear brackets 11C and 11D are provided between the left and right frame portions 10C and between the horizontal beam portion 10B and the center frame 9, respectively.

Reference numeral 12 denotes an operator's cab main body mounted on a support portion 10 of the revolving frame 4. The operator's cab main body 12 is formed by press-forming and welding a metal panel or the like as shown in FIGS. Hollow pillars 13, 14, 1 which are formed as a cab box having a shape and have hollow structures extending in the upward and downward directions at four corners of front, rear, left and right.
5 and 16 are integrally formed.

The operator cab body 12 includes a rectangular upper surface portion 12A extending forward and rearward between the upper ends of the hollow columns 13, 14 and the upper ends of the hollow columns 15, 16, and the hollow column 1
Front part 12B which extends between 3 and 14 by curving upward and downward
And a rear surface portion 12C extending upward and downward between the hollow columns 15 and 16 and facing the front surface portion 12B, and left and right side surface portions 12D and 12 connected to the rear surface portion 12C and the front surface portion 12B.
E and the like.

A floor bracket 12F is integrally provided on the inner surface of the front portion 12B, the rear portion 12C, and the side surfaces 12D and 12E at the lower end of the hollow column 12, and is provided on the floor plate bracket 12F. A floor plate 17 forming a part of the cab body 12 is fixed.

Reference numerals 18, 18,... Denote buffer supports provided between the support portion 10 of the revolving frame 4 and the driver's cab main body 12 in front, rear, left, and right. As shown in FIG. 7 and FIG.
The cab main body 12 is elastically supported on the revolving frame 4 by being integrally attached via 8A or the like. The buffer support 18 acts on the cab main body 12 and generates a constant damping force against downward vibration.

Here, among the respective buffer supports 18, the respective buffer supports 18 on the front frame 10E side and the respective buffer supports 18 on the rear brackets 11C and 11D are shown in FIGS. 8 and 12. Are arranged at four corners of the cab main body 12 at positions away from the center of the hollow columns 13 to 16 by a certain dimension δ (hereinafter, referred to as a separation dimension δ) toward the inside.

In the hydraulic shovel according to the prior art configured as described above, the lower traveling body 1 travels on the road, and the working device 8 performs excavation work of earth and sand. Also, when upward and downward vibrations are transmitted from the turning frame 4 side to the cab body 12 due to vibrations during traveling or excavation reaction force during work, a constant damping force is generated against the vibrations, This prevents the ride comfort in the driver's cab 7 from deteriorating.

[0012]

By the way, in the above-mentioned prior art, a total of four buffer supports 18 of each buffer support 18 are connected to the hollow columns 13, 14, 1 as shown in FIG.
The cab main body 12 is disposed at four corners of the cab main body 12 so as to be located closer to the inside by a separation dimension δ than the center position in the cabs 5 and 16.

For this reason, in the prior art, for example, when a lateral load is applied to the driver's cab body 12 from the front and rear directions or from the left and right directions, the entire driver's cab body 12 is provided with the respective buffer supports 18.
When the driver's cabin main body 12 receives such a bending moment, stress tends to concentrate on a relatively low-strength portion such as a welded portion of the floor plate bracket 12F. In addition, there is a problem that the rigidity of the entire cab body 12 is reduced.

Further, for example, Japanese Utility Model Laid-Open Publication No. 4-50460 (hereinafter referred to as another prior art) discloses a configuration in which a driver's cab body is elastically supported on a revolving frame via suspensions provided in hollow columns. Is disclosed.

However, in this case, a lateral load acting on the cab body from the turning frame side is received by a torsion bar or the like. It is impossible to prevent the rigidity of the cab main body from being reduced due to the bending moment acting on the cab.

The present invention has been made in view of the above-described problems of the prior art, and the present invention is directed to a case where an impact force such as a lateral load is applied to the driver's cab body, and the lateral load is applied to the shock absorbing support and the hollow column. The working machine with an operator cab is provided which can increase the rigidity of the operator cab main body including each hollow strut and ensure sufficient strength and simplify the entire configuration. It is intended to be.

[0017]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a working machine frame, an operator's cab main body having a hollow column disposed on the frame and extending upward and downward. , Provided between the cab body and the frame,
The present invention is applied to a working machine with a driver's cab, which comprises a buffer support member that buffers transmission of vibration from the frame to the driver's cab body.

The first aspect of the present invention is characterized in that a rod member extending in the hollow column of the cab body is provided integrally with the buffer support, and the rod member is provided in the hollow column of the cab body. According to another aspect of the present invention, there is provided a structure in which a displacement regulating member for regulating relative displacement of the hollow support in the front and rear directions or left and right directions with respect to the rod member is provided.

According to the above construction, even when an impact force such as a lateral load acts on the cab body, the displacement regulating member provided on the hollow column of the cab body is accordingly provided with the rod member integrally provided on the buffer support. , The relative displacement of the hollow column relative to the rod member in the forward and rearward directions or in the left and right directions is restricted. Thus, it is possible to prevent the cab main body including the hollow column from vibrating relatively largely with respect to the rod member under the influence of the lateral load.

According to the second aspect of the present invention, the cab body is formed of a cab frame formed in a box shape and the hollow pillars are respectively disposed at four front, rear, left and right corners. The shock-absorbing supports are disposed below the hollow columns at positions corresponding to the four corners of the cab body.

With this configuration, the hollow pillars at the four corners of the cab main body can be directly supported from below by the respective buffer supports, so that when a lateral load or the like acts on the cab main body, a large load is applied to the cab main body. Generation of a bending moment can be suppressed to a small value.

Further, in the invention according to claim 3, the buffer support has a bottomed cylindrical casing in which one end is closed as a bottom and the other end is an open end and a viscous fluid is sealed therein. An elastic body formed of an elastic material and fixed to the open end side of the casing so as to close the open end side of the casing; and a casing having a lower end inserted into the casing and an upper end penetrating the elastic body. A fixing bolt extending upward from the cab body and being fastened to the floor plate side of the cab body, provided at a lower end side of the fixing bolt located in the casing, and provided when the fixing bolt and the casing are relatively displaced. It comprises resistance generating means for generating a resistance to the viscous fluid in the casing, and the rod member is integrally formed on the upper end side of the fixing bolt.

Accordingly, when the cab body vibrates up and down, the casing of the buffer support and the fixing bolt are relatively displaced via the elastic body between the cab body and the frame. Thereby, the viscous fluid flows in the casing. At this time, a resistance force is given by the resistance force generating means, and a damping force against the vibration can be generated. Further, by integrally forming the rod member on the upper end side of the fixing bolt, the fixing bolt and the rod member can be easily formed as an integral body.

Still further, in the invention according to claim 4, the displacement regulating member is constituted by one or a plurality of displacement regulating plates having a rod insertion hole fixed in the hollow support and into which the rod member is inserted. ing.

Thus, the displacement regulating plate can be used as a reinforcing beam member for the hollow column. Further, when the hollow support is relatively displaced forward or backward or left and right with respect to the rod member, the rod insertion hole of the displacement restricting plate can be easily brought into contact with the outer peripheral side of the rod member.

[0026]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 to 5 show an embodiment of the present invention. In this embodiment, the same reference numerals are given to the same components as those in the above-described conventional technology, and the description thereof will be omitted.

In the drawing, reference numeral 21 denotes a revolving frame used in the present embodiment. The revolving frame 21 has substantially the same configuration as the revolving frame 4 described in the related art, and has a center frame 9, a support portion 22, and the like. I have. In addition, the bearing 22
Are horizontal beam portions 22A and 22B, side frame portion 22C, vertical beam portion 22
D, front frame portion 22E and front brackets 11A, 11B
For example, the bearing 10 is configured substantially the same as the bearing 10 described in the related art.

However, as shown in FIG. 2, instead of the rear brackets 11C and 11D described in the related art, rear brackets 23A and 23B having a larger outer shape than the rear brackets 11C and 11D are provided on the support portion 22. It differs from the prior art in that it is provided.

Reference numeral 24 denotes an operator's cab body used in the present embodiment.
The upper surface portion 24A, the front surface portion 24B,
It has a rear surface portion 24C, side surface portions 24D and 24E, a floor plate bracket 24F, a floor plate 25, and the like. The cab main body 24 is provided with hollow columns 26, 27, 28, and 29 at four corners of front, rear, left, and right.

Here, the hollow columns 26 to 29 are formed in the same manner as the hollow columns 13 to 16 according to the prior art and have a hollow structure. It differs from the prior art in that the displacement regulating plates 34 to 37 are provided respectively.

Reference numerals 30, 30,... Indicate a total of four liquid-filled rubber mounts as buffer supports according to the present embodiment.
As shown in FIGS. 4 and 5, each of the rubber mounts 30 is composed of a cushion support 1 according to the prior art from a casing 30A, an elastic body 30B, a movable plate 30C and a fixing bolt 32 described later.
8 is substantially the same as that of FIG. The rubber mount 30 elastically supports the cab body 24 on the revolving frame 21 together with other rubber mounts 38 described later.

Further, the rubber mounts 30 are disposed at positions corresponding to the four corners of the operator's cab main body 24, respectively, at front, rear, left and right sides, and are disposed substantially directly below the hollow columns 26 to 29. This is different from the prior art.

Here, the casing 30A is formed as a closed-end cylindrical body having one end side closed as a bottom portion 30A1, and a working oil made of a viscous fluid such as silicon oil is sealed in the inside thereof. . Each of the casings 30A has an opening end 30A2 on the other end side of the casing 30A.
They are integrally attached to the support portion 22 via attachment holes 31 and the like drilled over both the 2C and the front frame portion 22E.

The elastic body 30B is formed in a stepped cylindrical shape from rubber or the like, and its outer peripheral side is formed on the bottom 30A1 side and the open end 30A.
By being fixed along the inner peripheral side of the casing 30A with the A2 side, the opening end 30A2 is closed in a liquid-tight manner. The elastic body 30B defines a damping force generation chamber 30D in the casing 30A.

Further, the movable plate 30C is formed in a stepped cylindrical shape and is located below the elastic body 30B and is fixed to the lower end of the fixing bolt 32. The movable plate 30C is displaced upward and downward together with the elastic deformation of the elastic body 30B in response to the vibration of the cab main body 24. At this time, the damping force generating chamber 30
The hydraulic oil in D flows viscously through the outer peripheral side of the movable plate 30C or the like, thereby forming a resistance force generating means for generating flow resistance such as viscous resistance and flow resistance for the hydraulic oil.

The elastic body 30B and the floor plate bracket 24
F, a stopper 30E is provided.
OE prevents the elastic body 30B from being further elastically deformed by contacting the upper surface of the casing 30A when the elastic body 30B is largely deformed by the vibration of the cab main body 24.

Reference numeral 32 denotes a fixing bolt according to this embodiment.
As shown in FIGS. 4 and 5, the fixing bolt 32 has a longer overall length than the fixing bolt 18A according to the prior art. The lower end of the fixing bolt 32 is located on the damping force generation chamber 30D side and the casing 30
A elastic body 30B
It is fixed on the lower side. The upper end side of the fixing bolt 32 is a male screw portion 32 </ b> A extending upward from the casing 30 </ b> A through the elastic body 30 </ b> B, the floor plate 25, and the like, and extending upward at the center position in the hollow columns 26 to 29. It is fastened to 24F.

Here, the male screw portion 32A of the fixing bolt 32
As shown in FIGS. 4 and 5, a rod portion 32B as a rod member is integrally formed at the upper end. The upper end side of each rod portion 32B is provided with a displacement regulating plate 34 described later.
Hollow pillar 26- through the notch 34A-37A
29, it is elongated in the upward direction.

Numerals 34, 34,... Denote displacement regulating plates as displacement regulating members provided in the hollow columns 26. The displacement regulating plate 34 is made of, for example, a substantially rectangular steel plate having high rigidity. It is formed as shown in FIG. 3 and FIG. For example, a total of three displacement restricting plates 34 are arranged at intervals in the upward and downward directions, and are firmly fixed along the inner wall surface of the hollow support 26 by welding or the like. Also,
As shown in FIG. 3, a notch 34A as a rod insertion hole having a substantially U-shape is formed in the displacement restricting plate 34, and the notch 34A is arranged so as to surround the rod 32B from the periphery with a slight gap. Has been established.

Also, 35, 36, and 37 are hollow columns 27,
Other displacement regulating plates (only one is shown) as displacement regulating members respectively provided in 28 and 29 are shown, and the displacement regulating plates 35, 36 and 37 are also shown in FIG. 34, and each rod portion 3
The portions corresponding to 2B are notches 35A, 36A,
37A. And the displacement regulating plates 35 to 37
Are arranged in the hollow columns 27 to 29, for example, three in total at intervals upward and downward.

When the operator cab main body 24 relatively oscillates (bends) with respect to the floor plate 25 at an angle θ as shown by a dashed line in FIG.
The notches 34A to 37A abut on the outer peripheral surface of the rod 32B, whereby the restricting plates 34 to 37 restrict the relative displacement of the hollow columns 26 to 29 with respect to the rod 32B. .

Reference numerals 38, 38 denote other liquid-filled rubber mounts as buffer supports provided on the front brackets 11A, 11B of the revolving frame 21, and the rubber mounts 38 are substantially the same as the rubber mounts 30 described above. It is composed. Each rubber mount 38 is attached to the lower side of the floor plate 25 via each fixing bolt 38A or the like.

The hydraulic shovel according to the present embodiment has the above-described configuration, and its basic operation is not particularly different from that of the prior art.

In this embodiment, however, each of the liquid-filled rubber mounts 30 is provided with hollow columns 26 to 2 at the four corners of the cab main body 24.
9, each fixing bolt 32
Are aligned with the respective center positions in the hollow columns 26 to 29 and fastened to the floor plate bracket 24F. Therefore, the hollow columns 26 to 29 at the four corners of the cab main body 24 are mounted on the respective rubber mounts from below. 30 allows direct support. Thereby, even when the lateral load F acts on the cab main body 24 as shown in FIG. 4, a large bending moment due to the separation dimension δ is generated in the cab main body 24 as described in the related art. Can be suppressed.

In the hollow columns 26 to 29, the respective displacement regulating plates 34 to 37 are disposed at intervals in the upward and downward directions, respectively, and the notch portions 34A to 34C provided in the respective displacement regulating plates 34 to 37 are provided.
Each rod portion 32B integrally formed with each fixing bolt 32 is inserted into the inside of 37A through a slight gap. Therefore, as shown by a dashed line in FIG. Is in front of the floorboard 25 at an angle θ,
In the case of relatively oscillating (deflecting) in the rearward direction or in the left and right directions, the respective displacement regulating plates 34 (35 to 37) integrated with the hollow columns 26 (27 to 29) are connected to the floor plate bracket 24F. It comes into contact with the rod portion 32B fixed to the side.

As a result, the lateral load F is applied to each displacement regulating plate 3.
4 (35 to 37) and the rod portion 32B, and the hollow support 26 to each rod portion 32B can be received.
29 can be regulated. And the driver's cab body 24
The whole can be prevented from vibrating more than necessary under the influence of the lateral load F, and the vibrations such that the hollow columns 26 to 29 of the cab main body 24 are greatly inclined with respect to the floor plate 25 can be suppressed. For example, stress can be reliably prevented from concentrating on a relatively low strength portion such as a welded portion of the floor plate bracket 24F.

Moreover, each of the displacement regulating plates 3 having high rigidity
4 to 37 are fixedly provided in the hollow columns 26 to 29 so that the displacement restricting plates 34 to 37 can be attached to the hollow columns 26 to 2.
9 can also be used as the reinforcing beam member, and the hollow columns 26 to 29 having high rigidity can be formed not only in the vertical and horizontal loads but also in the lateral load F and the like.

Therefore, according to the present embodiment, the cab main body 24 having high rigidity and high rigidity against a load such as the lateral load F is provided by the rubber mounts 30 and the displacement restricting plates 34 to 37. Besides, as described in other related arts, it is not necessary to provide a special torsion bar or the like for receiving a lateral load by the shock-absorbing support, so that the entire configuration can be simplified.

Each fixing bolt 32 and each nut 3
4 can be hidden in the hollow columns 26 to 29, respectively.
As a result, as described in the related art, the fixing bolt 18
A (see FIG. 12) and the like do not appear in the driver's cab 7 and hinder the operator, so that the space under the driver's cab 7 can be made wider and the appearance can be improved as compared with the related art. .

In the above embodiment, each displacement regulating plate 34
It has been described that the notches 34A to 37A directly contact the rod portions 32B.
An elastic body such as rubber may be provided on at least one of the rod 7A and the rod portions 32B. In this case, an impact or the like when the notches 34A to 37A collide (contact) with the respective rods 32B can be attenuated by the elastic body.

In the above embodiment, the hollow columns 26 to 2 are used.
Although it has been described that three displacement regulating plates 34 to 37 are respectively provided in 9, for example, four or more displacement regulating plates 34 to 37 may be provided, or two or less displacement regulating plates 34 to 37 may be provided. .

Further, in the above embodiment, the fixing bolt 32
Although the rod portion 32B has been described as being integrally formed with the male screw portion 32A, a long-axis fixing bolt having a male screw portion formed in advance from the lower end to the upper end may be used instead. .

Furthermore, in the above-described embodiment, a hydraulic excavator has been described as an example of a working machine. However, the present invention is not limited to this, and other working machines such as a wheel loader and a hydraulic crane having an operator cab may be used. Can also be applied.

[0055]

As described above in detail, according to the first aspect of the present invention, the buffer member is provided integrally with the rod member extending inside the hollow hollow column provided in the cab body, and the hollow column is provided on the hollow column. Since a displacement regulating member is provided to regulate the relative displacement of the hollow column relative to the rod member in the forward or rearward direction or in the left and right directions by contacting the rod member. Lateral displacement, etc., can be received by these displacement restricting members and rod members, and the entire cab body is prevented from vibrating (bending) more than necessary under the influence of the lateral loads, etc. Can be. Thereby, the rigidity of the driver's cab body against the lateral load can be increased to greatly increase the overall strength, and the overall configuration can be simplified.

According to the second aspect of the present invention, each buffer support is provided below each hollow support provided at the four corners of front, rear, left, and right of the cab body. The four corners of the cab main body can be directly supported from below by the respective buffer supports, whereby a lateral load or the like acts on the cab main body and the cab main body is A large bending moment can be prevented from being received, and the rigidity of the driver's cab body against a lateral load or the like can be further increased.

Further, according to the third aspect of the present invention, a bottomed cylindrical casing in which a viscous fluid is sealed, and a lower end is inserted into the casing via an elastic body and an upper end extends upward from the casing. A fixing bolt fastened to the floor plate side of the chamber main body; and a lower end side of the fixing bolt located in the casing and provided to the viscous fluid in the casing when the fixing bolt and the casing are relatively displaced. Since the buffer support is constituted by the resistance generating means for generating the resistance, the damping force is generated by the viscous fluid and the resistance generating means when the cab body vibrates up and down. And the ride comfort can be improved.
Further, since the rod member is integrally formed on the upper end side of the fixing bolt, the fixing bolt and the rod member can be easily formed as an integral body, and the work and the like during the manufacturing can be improved by eliminating the trouble of separately manufacturing the two. .

Further, in the invention of claim 4, the displacement regulating member is constituted by one or a plurality of displacement regulating plates which are fixed in the hollow support and have a rod insertion hole into which the rod member is inserted. Therefore, the displacement restricting plate can be used as a reinforcing member for the hollow column, and the rigidity of the hollow column itself can be easily increased. Further, when the hollow support is relatively displaced forward or rearward or left and right with respect to the rod member, the rod insertion hole of the displacement restricting plate can be brought into contact with the outer peripheral side of the rod member. The relative displacement of the hollow column with respect to the member can be reliably regulated, and the rigidity of the cab body can be further increased.

[Brief description of the drawings]

FIG. 1 is a partially broken plan view showing a cab of a hydraulic shovel according to an embodiment of the present invention.

FIG. 2 is a plan view showing a support portion side of a turning frame in a state where a cab main body in FIG. 1 is removed.

FIG. 3 is an enlarged view of a main part in FIG. 1 showing a hollow support column and the like of a cab main body.

FIG. 4 is a sectional view as seen from the direction of arrows IV-IV in FIG. 3;

FIG. 5 is an enlarged view of a main part in FIG. 4;

FIG. 6 is an overall view showing a conventional hydraulic excavator.

FIG. 7 is a partially broken external view showing a turning frame, a cab, and the like in FIG. 6 in an enlarged manner.

FIG. 8 is a partially cutaway plan view showing the cab in FIG. 6 in an enlarged manner.

9 is a plan view showing the support portion side of the turning frame with the cab removed, as viewed from the direction of arrows IX-IX in FIG. 7;

FIG. 10 is a perspective view showing a cab in FIG. 7;

11 is an exploded perspective view showing the turning frame, the cab main body, and the liquid-filled rubber mount in FIG. 7;

12 is a perspective view of a mounting portion of the liquid-filled rubber mount in FIG. 11 as viewed from the cab.

[Explanation of symbols]

Reference Signs List 21 swivel frame 24 cab body 25 floor plate 26, 27, 28, 29 hollow support 30 liquid-filled rubber mount (buffer support) 30A casing 30A1 bottom 30A2 open end 30B elastic body 30C movable plate (resistance generating means) 32 fixed Bolt 32B Rod part (rod member) 34, 35, 36, 37 Displacement regulating plate (displacement regulating member) 34A, 35A, 36A, 37A Notch (rod insertion hole)

Claims (4)

[Claims] 1. A cab main body having a frame of a working machine, a cab body provided on the frame, and having a hollow column extending upward and downward, provided between the cab main body and the frame, and provided from the frame. A working member with a driver cab comprising: a buffer support member for buffering transmission of vibrations of the driver cab to the driver's cab body; a rod member extending in a hollow support of the driver cab body is integrally provided on the buffer support member; An operation, wherein a displacement restricting member for restricting relative displacement of the hollow support in the hollow support in the front, rear or left and right directions with respect to the rod member is provided in the hollow support of the chamber body. Working machine with room. 2. The cab main body is formed of a cab frame formed in a box shape and the hollow pillars are respectively disposed at four front, rear, left and right corners, and the cushioning support is formed by the cab frame. The working machine with a cab according to claim 1, wherein the working machine with a cab is disposed at a position corresponding to four corners of the cab body below each hollow support. 3. The cushioning support body is formed of a bottomed cylindrical casing in which one end is closed as a bottom and the other end is an open end and a viscous fluid is sealed therein, and an elastic material. An elastic body fixed to the opening end side of the casing so as to close the opening end side of the casing; and a lower end side inserted into the casing and an upper end side extending upward from the casing through the elastic body and extending upward from the casing. A fixing bolt fastened to the floor plate side of the main body, and provided at a lower end side of the fixing bolt located in the casing and resisting a viscous fluid in the casing when the fixing bolt and the casing are relatively displaced. The working machine with an operator's cab according to claim 1 or 2, further comprising resistance force generating means for generating a force, wherein the rod member is integrally formed on an upper end side of the fixing bolt. 4. The displacement restricting member comprises one or more displacement restricting plates fixed in a hollow support and having a rod insertion hole into which the rod member is inserted. 4. The working machine with a cab according to 3.