JPH0251814A - Seat switch device - Google Patents

Abstract

PURPOSE:To strictly and reproducibly satisfy the safety regulation prescribed for a working machine or the like by providing a center horizontal section at the free end of a T-shaped plate and inclined sections extending slantly upward toward both sides and providing a seat protruded section and a seat switch apart from the center horizontal section above and below the free end respectively. CONSTITUTION:A flat T-shaped plate 2 stored in a space section formed at the lower section in a seat 1 is horizontally supported in the cantilever state, a center horizontal section 2a is formed on the free end of the plate 2, inclined sections 2b and 2c extending slantly upward toward both sides from the center horizontal section 2a are formed, the protruded section 1a of the seat 1 and a seat switch 6 are arranged apart from the center horizontal section 2a of the free end above and below the free end of the plate 2 respectively. When the attitude of a worker is inclined by the preset angle or more, the center horizontal section 2a of the plate free end is inclined and separated from the seat switch 6, thus the seat switch 6 is turned off, the drive of an engine is stopped, the safety of the worker is secured. The regulation content can be strictly and reproducibly satisfied.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a seat switch device that is housed in a seat of a working machine or the like.

(Prior art) In order to ensure safety, in working machines such as riding lawn mowers, for example, the worker on the seat is tilted at a predetermined angle (15 degrees) or more in the left-right direction, or the worker or the seat is tilted at a heel of more than 658'. It is stipulated that the engine should stop driving when the
986) Therefore, various attempts have been made to satisfy the above regulations by providing a seat switch device under the seat of a working machine.

(Problems to be Solved by the Invention) However, with conventional seat switch devices, it is extremely difficult to strictly satisfy the specified contents with good reproducibility.
Improvements to this were hoped for.

The present invention has been made in view of the above-mentioned circumstances, and its object is to provide a seat switch device that can strictly satisfy the specified contents with good reproducibility.

(Means for Solving the Problems) In order to achieve the above object, the present invention supports a water moat plate in a cantilevered state that is housed in a space formed in the lower part of the seat, and At the free end of the plate, a central water gutter part and an inclined part extending diagonally upward from the central horizontal part to both sides are formed, and at the top and bottom of the free end of the plate, a central water gutter part of the free end is formed. a protrusion of the sheet, spaced apart from
The present invention is characterized in that a seat switch device is constructed by arranging seat switches respectively.

(Function) When the operator is not sitting on the seat, the seat switch is separated from the center horizontal part of the free end of the plate.
The seat switch is in the OFF state, and in this state it is impossible to drive the engine.

When a worker sits on the seat, the seat is compressively deformed and its protrusion comes into contact with the free end of the plate, causing the free end of the plate to move downward, so that the free end of the plate is forced into contact with the seat switch located below it. This turns it on and enables the engine to run. Even if the worker's posture is inclined during work, as long as the angle of inclination is within a predetermined value (for example, 15 degrees), only the inclined part of one free end of the plate (the inclined side) will be deformed. Since the central horizontal portion remains in the same state and the seat switch is maintained in the ON state, the engine drive is not stopped.

However, if the worker's posture tilts beyond a certain angle, the center horizontal part of the free end of the plate will tilt and move away from the seat switch, which will turn the seat switch OFF, causing the engine to stop running and endangering the safety of the worker. Secured.

Additionally, if a worker stands up and leaves the seat while the engine is running, the seat and plate will return to their original state within a predetermined time (for example, 5 seconds) due to their elasticity.
'Place this at the free end of the plate or away from the seat switch.
The engine is turned on or off within a predetermined time after the operator leaves the seat.

(Example) An example of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a side sectional view of a seat that accommodates a seat switch device according to the present invention, FIG. 2 is a cutaway front view of the same seat, and FIG.
The figure is a partial bottom view of the seat, FIG. 4 is a perspective view of the plate, and FIGS. 5(a) to 5(d) are explanatory views of the operation of the seat switch device.

As shown in the figure, a space S is formed in the lower part of the seat 1, and a metal plate 2 having a single-shaped plane is housed in the center of the space S. The rear end of this plate 2 is supported by a bolt 4.4 and a nut 5.5 on a support protrusion 3a integrally bulging from a bottom plate 3 that covers the bottom surface of the seat l. is homogeneously supported in a cantilevered state within the space S.

As shown in FIG. 4, the plate 2 has a central horizontal portion 2a at its front free end, and #R oblique portions 2b extending obliquely upward from the central horizontal portion 2a toward both sides. 2c
have.

Above the free end of the plate 2, there is a sheath 1 marked with #.
91 When the operator is not sitting on the seat 1, the protrusion 1a facing into the space S of the plate 1 is located at the forward-inclined M portions 2b, 2 at the free end of the plate l.
c and is spaced a predetermined distance from the central horizontal portion 2a (see Figures 1, 2, and 5(a)).
.

On the other hand, a seat switch 6 is housed and fixed in a channel-shaped housing 7 below the seat l, and an actuator 6a of the seat switch 6 is connected to the bottom plate 3.
It faces into the space S from a hole 3b formed in the hole 3b.

When one worker is not sitting on the seat L, the center horizontal part 2a of the plate 2 is connected to the actuator 6 of the seat switch 6.
It is separated from a (Figures 1 and 5 (am! It,
Incidentally, the switch 6 interrupts the flow of current in the electric circuit of the engine ignition line in the OFF state to stop driving the engine.

Therefore, when one worker is not sitting on the seat L, the center horizontal part 2a of the plate 2 and the actuator 6a of the seat switch 6 are separated from each other, as shown in FIG. is in the OFF state, and in this state it is impossible to drive the engine.

When a worker sits on the seat 1, the seat 1 is compressively deformed as shown in FIG. 5(b) and its protrusion @1a moves the free end of the plate 2 downward. The actuator 6a of the seat switch 6 located below this is actuated to turn on the seat switch 6, thereby enabling the engine to be driven. Even if the worker's posture is tilted to one side during work, as long as the tilt angle is within a predetermined value (for example, 15 degrees), ffJ5 (C)
As shown, only one (sloping side) sloped part (in the illustrated example, sloped part 2b) of the free end of the plate 2 is deformed and comes into contact with the bottom plate 3, while the central horizontal part 2a remains in the same state. Since the seat switch 6 is maintained in the ON state, the engine drive is not stopped and work can be continued.

However, if the worker's posture is tilted beyond a predetermined angle, the central horizontal portion 2a of the plate 2 will tilt and move away from the actuator 6a of the seat switch 6, as shown in FIG. 5(d). 6 is turned off and the engine is driven or stopped to ensure the safety of the workers.

Furthermore, if a worker stands up and leaves the seat 1 while the engine is running, the seat 1 or its elasticity will return to its original state within a predetermined time (for example, 5 seconds) and the protruding portion 1a will return to its original state.
Since the plate 2 moves upward, no external force acts on the plate 2, and the plate 2 also returns to its original state due to its elasticity and maintains a horizontal state, as shown in FIG. 5(a).
The central horizontal portion 2a of the seat switch 6 is moved away from the actuator 6a of the seat switch 6 to turn off the seat switch 6, thereby causing the engine to be driven or stopped within a predetermined time after the operator leaves the seat 1. In this way, the plate 2 returns to the horizontal state due to its own elasticity and turns off the seat switch 6, so that even if the elasticity of the seat 1 is lost, the seat switch 6 will be turned off reliably.

Thus, in this embodiment, the contents of the safety regulations imposed on a single work machine etc. can be strictly satisfied with good reproducibility.

(Effects of the Invention) As is clear from the above description, according to the present invention, a plate in the shape of a single plane, which is housed in a space formed in the lower part of the seat, is horizontally supported in a cantilevered state, and the plate is free to move freely. A central horizontal part and an inclined part extending diagonally upward from the central horizontal part to both sides are formed at the end, and the plate is provided above and below the free end of the plate at a distance from the central water moiety of the free end. Since the seat switch assembly δ is constructed by arranging the seat protrusion and the seat switch, the effect is that the safety regulations imposed on working machines etc. can be strictly satisfied with good reproducibility. .

[Brief Description of the Drawings] Fig. 1 is an OJl sectional view of a seat that accommodates a seat switch device according to the present invention, Fig. 2 is a cutaway front view of the same seat,
FIG. 3 is a partial bottom view of the seat, FIG. 4 is a perspective view of the plate, and FIGS. 5(a) to 5(d) are explanatory views of the operation of the seat switch device. DESCRIPTION OF SYMBOLS 1... Seat, 1a... Seat protrusion part, 2... Plate, 2a... Central horizontal part, 2b, 2c... Inclined part, 6... Seat switch, S... Space part .

Claims (1)

[Claims] A flat T-shaped plate stored in a space formed in the lower part of the seat is horizontally supported in a cantilevered state, with a central horizontal part at the free end of the plate, and a horizontal part diagonally extending from the central horizontal part to both sides. It is characterized by forming an upwardly extending sloped portion, and disposing a protruding portion of the seat and a seat switch above and below the free end of the plate, spaced apart from the central horizontal portion of the free end. Seat switch device.