JP3622080B2 - Heavy machine operation seat - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, when operating a hoist (crane), a construction machine, other heavy equipment for construction work or construction work (hereinafter referred to as a heavy machine), it sits by holding a control stick or a handle and frequently leans forward. The present invention relates to a heavy machine operation seat that can reduce the muscle load on the back of the waist associated with the work by elastically pressing or recoil-supporting the body load of the heavy machine operator who performs the work at a high position while taking the work.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there are known office chairs and treatment chairs having a chest support and supporting the chest (or chest abdomen) when taking a forward leaning posture. (For example, see Japanese Utility Model Laid-Open No. 6-46556, USP5401078.)
[0003]
However, when seating and operating heavy machinery, the heavy machinery operator's seat for heavy machinery is considered for occupational health, which can reduce the strain on the back of the waist during work by elastically distributing and supporting the body load of heavy machinery operators. I don't see it.
[0004]
This kind of heavy equipment operation seat (operator's cab) is installed at a relatively high place, and heavy equipment operators work (machine operation) while looking into the load (object) below, so that the waist leans forward. Often it takes a bad posture repeatedly.
[0005]
For example, overhead cranes are generally located at a height of 20 to 30 m, and a work posture in which the waist is tilted forward frequently occurs because the load on the ground is looked up at when lifting and lowering the load on the ground. .
[0006]
Looking at the posture analysis of the crane work so far, the time ratios of upright sitting position, lumbar forward tilt of 0-30 ° and 30 ° or more during driving operation of 6.3 hours are 38.1%, 23%, respectively. .8% and 38.1%, and the appearance frequency of the forward leaning posture of the waist is as high as 61.9%, and the burden on the waist is high because there are many bad postures.
[0007]
In addition, the rate of pain complaints of the neck, back, and lower back of the crane driver (heavy machinery operator in the present invention) is as high as 35%, 35%, and 53.3%, respectively. The above-mentioned anteversion posture is important as a high factor in the complaint of cervical back pain.
[0008]
Up to now, as countermeasures for back pain of crane operators, changes in the cab position to relieve forward leaning posture, conversion of standby posture with reclining seat, etc. have been attempted, but it has been fully resolved Absent.
[0009]
[Problems to be solved by the invention]
To explain the problem of leaning forward here, the mechanism of the front of the lower back during inclined attitude burden, when holding the stoop of the upper body, the upper half of the body of the anteversion is when there is nothing to support this The muscles of the lower back are contracted against the moment of force to generate a backward tilting moment. At this time, a persistent strong load is applied to the lower back, which causes a back and back pain.
[0010]
The solution to this problem is to provide a chest-abdominal support that supports the chest and abdomen like a back rest to balance the moment of force related to the forward leaning of the upper body. It is desirable to reduce the burden of
[0011]
Therefore, based on the above knowledge, a crane operation seat is required that considers at least the following points.
[0012]
[1] When operating the crane, use both upper limbs to operate the lever.
[0013]
[2] The forward inclination differs depending on the height of the load.
[0014]
[3] The upper body tilts left and right depending on the position of the load.
[0015]
[4] One crane should be used jointly by operators (operators) with different physiques.
[0016]
[5] The driver's cab is small and can be easily seated.
[0017]
The present invention has been made in view of such circumstances, and includes a thoracoabdominal support body to which a pad member necessary for solving the above-described problems is attached, and sits frequently holding a control stick and a handle. A heavy equipment operation seat that can reduce the strain on the back and back muscles during work by elastically pressing or recoil-supporting the body load of heavy equipment operators who work at heights while taking a forward leaning posture. It is to provide.
[0018]
Of course, the heavy machinery operating sheet of the present invention is not limited to a crane, and can be applied to all heavy machinery having the same problems as described above.
[0019]
[Means for Solving the Problems]
In order to solve the problem, the present invention is designed to elastically press or recoil the body load of a heavy machinery operator who sits by grasping a control stick or a handle and frequently works in a tilted position while performing a work at a high altitude from the thoracoabdominal side. By supporting, it is a heavy machine operation sheet for reducing the muscle burden on the back and back of the work,
The chest and abdomen support body with at least a pad member attached to the front edge of the seat part facing the backrest part is erected so that the height can be adjusted, and it can be tilted forward by using a non-linear spring with the base end as a fulcrum It is elastically supported so that it can be restored.
The restoring force of the nonlinear spring exhibits sinusoidal nonlinear characteristics,
The pad member of the thoracoabdominal support is brought into contact with the chest and abdomen of the operator who has shifted to the forward leaning posture and pressed or recoiled in the restoring direction so as to balance the moment of force related to the forward tilt of the upper body. It is characterized by that.
[0020]
Here, there is a case in which the chest / abdomen support is attached so that the outer periphery of the seat excluding the backrest is rotatable.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
In an embodiment of the present invention, in the above configuration, the thoracoabdominal support body has a foldable body part, and the base end is erected and fixed to the front end of the cushion support member disposed on the lower surface of the seat part.
[0022]
In order to reduce the load on the neck of the operator, a chin rest may be connected to the pad member of the thoracoabdominal support.
[0023]
The elastic support of the thoracoabdominal support is made by a non-linear spring that adjusts the accumulation or release of restoring force or elastic energy in response to the operator's sinusoidal forward tilting load, to prevent posture fluctuation or load fluctuation. The operator's chest and abdomen are always pressed or recoiled with a constant restoring force without being affected. That is, the non-linear spring is an elastic material whose restoring force exhibits sinusoidal non-linear characteristics.
[0024]
Here, what is necessary is just to be comprised so that a press support is possible when the operator's forward leaning attitude is taken.
[0025]
According to this characteristic configuration, the following effects can be obtained.
[0026]
(1) It can be folded so that it can be easily seated.
[0027]
(2) The height can be adjusted according to the physique of the operator.
[0028]
(3) It has elasticity in the front, rear, left and right, and can press and support the chest and abdomen according to the forward tilt (or right and left tilt) posture of a predetermined angle or more.
[0029]
(4) The elastic force (restoring force) can be adjusted according to the difference in load (weight).
[0030]
(5) It is not affected by posture fluctuations or load fluctuations related to the forward tilt of the operator, and always presses or recoils the operator's chest and abdomen with a constant restoring force, thereby greatly reducing the muscular burden on the back of the waist associated with the work. Since it can be effectively reduced, the back and back pain prevention effect is high.
[0031]
【Example】
An embodiment of the present invention will be described below with reference to the accompanying drawings.
[0032]
FIG. 1 is a side view explanatory view of a heavy machinery operating sheet according to an embodiment of the present invention, and FIG. 2 is a front view explanatory view.
[0033]
FIG. 3 is a partial explanatory view of the thoracoabdominal support, wherein (a) is a side view and (b) is a front view.
[0034]
As shown in the drawing, this example sheet (X) has a thoracoabdominal support (4) having at least a pad member (5) attached to the front edge of the seat (3) opposite the backrest (2). It stands upright so that its height can be adjusted, and is elastically supported so that it can be tilted forward and restored with the base end (42) as a fulcrum.
[0035]
Here, the thoracoabdominal support (4) has a foldable body (41; 411), and the base end is erected and fixed to the front end of the cushion support member (7) disposed on the lower surface of the seat. . The height adjusting means (412) is, for example, a bolt locking hole formed in multiple stages in the body part. Therefore, the operator sits in a cool manner across the thoracoabdominal support (4) and takes a working posture.
[0036]
Further, the elastic support of the thoracoabdominal support (4) is based on a non-linear spring (not shown) that adjusts the accumulation or release of restoring force or elastic energy corresponding to the operator's sinusoidal forward tilting load. The chest and abdomen of the operator are always pressed or recoiled with a constant restoring force without being influenced by posture fluctuation or load fluctuation. That is, the non-linear spring is an elastic material whose restoring force exhibits sinusoidal non-linear characteristics.
[0037]
As shown in the explanatory diagram of the use state in FIG. 4, the operator sits in a manner that straddles the chest / abdomen support (4) and takes a working posture. Then, the pad member (5) of the thoracoabdominal support (4) is brought into contact with the chest abdomen of the operator who has shifted to the forward leaning posture and pressed in the restoring direction, so that the moment of force relating to the forward tilt of the upper body is reduced. I try to get a balance .
[0038]
When the chest / abdominal support (4) is erected and fixed, it is preferable to provide a degree of freedom (play) that can move left and right within a predetermined range following the operator's left-right tilting posture.
[0039]
In addition to the above configuration, a chin rest (6) may be connected to the pad member (5) of the thoracoabdominal support (4) in order to reduce the load on the neck of the operator. [Indicated in phantom lines in FIGS. ]
[0040]
Further, the base (71) of the cushion support member (7) is pivotally attached to the central column (1), and the chest / abdomen support (4) is attached to the outer periphery of the seat (3) except for the backrest (2). You may comprise so that it can rotate and a position can be changed. [See the arrow in FIG. 4. ]
[0041]
【The invention's effect】
The present invention is configured as described above, and according to this, it is not affected by the posture fluctuation or load fluctuation related to the forward tilt of the heavy machinery operator, and always presses or recoils the operator's chest and abdomen with a constant restoring force. By doing so, the muscular burden on the back and back at the time of the work can be remarkably reduced, so that the effect of preventing back and back pain is high, and there is a beneficial effect on occupational health.
[Brief description of the drawings]
FIG. 1 is a side view illustrating a heavy machinery operating sheet according to a first embodiment.
FIG. 2 is also a front view explanatory view.
FIG. 3 is a partial explanatory view of a thoracoabdominal support.
FIG. 4 is an explanatory diagram showing a use state.
[Explanation of symbols]
1 Center column 2 Backrest 3 Seat (seat surface)
4 Chest Abdominal Support
41 body
411 Folding means
412 Height adjustment means
42 Base 5 Pad member 6 Chin rest 7 Cushion support member
71 Base X Heavy Equipment Operation Sheet

Claims (4)

In heavy machinery operation seats used for high-altitude work,
The back of the lumbar region that accompanies the work by elastically pressing or recoil-supporting the body load of heavy equipment operators who sit on the control stick and handle and frequently lean forward while working at a high altitude. It is a heavy machine operation seat that can reduce the strain on the muscles,
The chest and abdomen support body with at least a pad member attached to the front edge of the seat part facing the backrest part is erected so that the height can be adjusted, and it can be tilted forward by using a non-linear spring with the base end as a fulcrum It is elastically supported so that it can be restored.
The restoring force of the nonlinear spring exhibits sinusoidal nonlinear characteristics,
The pad member of the thoracoabdominal support is brought into contact with the chest and abdomen of the operator who has shifted to the forward leaning posture and pressed or recoiled in the restoring direction so as to balance the moment of force related to the forward tilt of the upper body. Heavy machine operation sheet characterized by that. The heavy machine operation seat according to claim 1, wherein the chest and abdomen support body is rotatably attached to the outer periphery of the seat portion excluding the backrest portion. Has a body portion capable thoracoabdominal support fold, heavy machinery operating sheet according to claim 1 or 2, wherein those erected fixing the base end to the front end of the cushion support member which is disposed on the seat bottom surface. The heavy machinery operation sheet according to any one of claims 1 to 3, wherein a chin rest is continuously provided on a pad member of a thoracoabdominal support body in order to reduce a load on an operator's neck.

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