JPH07277178A - Safety device for floor conveyor - Google Patents

Abstract

PURPOSE:To prevent the danger that a worker's foot is caught by a slit of the floor plates, which seal a pit, and that a foreign matter is fallen into the pit through the slit, and to aim at the safety of the floor surface of a conveyor. CONSTITUTION:Plural auxiliary floor plates 52 are arranged along at least one edge of a required block of a slit 22 of the floor plates 21. Each auxiliary floor plate 52 is supported on an arm 61 freely to be moved forward and backward in relation to the yoke moving route and freely to be oscillated in the vertical direction so as to form the surface as same as the floor plates 21. Downward oscillation of each auxiliary floor plate 52 is regulated by a stopper 71 so that the condition that the auxiliary floor plates 52 is formed as same as the floor plates 21 is the lower limit. The auxiliary floor plates 52 are energized by a spring 75 so as to be oscillated downward. A yoke 35 during the movement abuts on the auxiliary floor plates 52 at the lower limit position, and the auxiliary floor plates 52 are thereby oscillated upward so as to be retreated from the yoke moving route.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for ensuring the safety of a floor surface of a floor conveyor used for transporting a car body in an automobile factory.

[0002]

Generally, a pit is provided on the floor and a trolley traveling rail is provided in the pit,
The top opening of the pit is closed by a floor plate that is flush with the floor surface, and the floor plate is provided with a slit that extends directly above the rail in parallel with the rail. Floor conveyors having a yoke connecting them are known.

In the above conveyor, if the operator's foot is caught in the slit, the operator may fall and it is dangerous. Further, if a foreign matter falls through the slit in the pit, it is dangerous because the foreign matter is caught in the trolley.

Conventionally, no measures have been taken to prevent the above danger and ensure safety.

An object of the present invention is to provide a safety device for securing the floor surface of a floor conveyor.

[0006]

In the safety device according to the present invention, a pit is provided on the floor, a trolley traveling rail is provided in the pit, and an upper end opening of the pit is closed by a floor plate which is flush with the floor. On the floor board, a slit extending right above the rail in parallel with the rail is provided, and in a floor conveyor having a yoke that connects the trolley and the load carrying table through the slit, A plurality of auxiliary floorboards arranged along at least one edge,
At least one attached to each of the auxiliary floorboards,
In addition, the lower limit of the condition is that the auxiliary floor plates move forward and backward with respect to the movement path of the yoke, and the plurality of support arms are swingably arranged vertically so that they can be flush with the floor plate, and the auxiliary floor plate is flush with the floor plate. The auxiliary yoke is provided with stoppers for restricting downward swinging of the auxiliary floorboard, and biasing means for biasing the auxiliary floorboard to swing downwards. Abut the auxiliary floorboard of
As a result, the auxiliary floor plate is swung upward and is retreated from the yoke movement path.

[0007]

In the safety device according to the present invention, a plurality of auxiliary floor plates arranged along at least one edge of the slit required section, and at least one auxiliary floor plate attached to each of the auxiliary floor plates, and each of the auxiliary floor plates are provided. A plurality of support arms that are vertically swingable so as to move forward and backward with respect to the movement path of the yoke and can be flush with the floor plate, and the auxiliary floor plate so that the lower limit is the state where the auxiliary floor plate is flush with the floor plate. Since each of them is provided with a stopper that restricts the downward swing of the auxiliary floorboard and an urging means that urges the auxiliary floorboard to swing downward, the auxiliary floorboard is normally positioned at the lower limit and the floorboard is It is held in a state of being flush with.

Further, since the moving yoke abuts on the auxiliary floor plate at the lower limit position, which causes the auxiliary floor plate to swing upward and be withdrawn from the movement path of the yoke, the auxiliary floor plate serves as a carrier. It does not interfere with the movement.

[0009]

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

Referring to FIG. 1, a pit 12 is provided on a floor surface 11. A power rail 13 is provided in the pit 12, and a free rail 14 is provided above the power rail 13 and in parallel therewith. A pair of swing rails 15 are provided on both sides of the free rail 14. A power trolley 16 is mounted on the power rail 13, and a free trolley 17 is mounted on the free rail 14. Power trolley 16
A drive chain 18 is suspended from. A carrier 19 is mounted on the free trolley 17.

The upper end opening of the pit 12 is closed by a floor plate 21 which is flush with the floor surface 11. The floor plate 21 is provided with a slit 22 extending right above the rails 13 and 14 in parallel with the rails 13 and 14.

The carrier 19 is straddled by the leading and trailing free trolleys 17, and is connected to each of the leading and trailing free trolleys 17 via a kingpin bracket 31 so as to move in the pit 12. The front and rear horizontal swing-arms 33, to which the pair of connecting rods 32 are stopped, and the vehicle body W, which is outside the pit 12,
It is composed of an H-shaped carrier loading platform 34 in plan view, and leading and trailing yokes 35 that connect the leading and trailing horizontal swing arm 33 to the loading platform 34, respectively.

At both ends of the swing arm 33, swing rails are provided.
The roller 36 received at 15 is installed.

The yoke 35 is made of a U-shaped member, has a vertical pillar 41, and has a slit in the middle of the height of the pillar 41.
22. Referring to FIG. 3, the horizontal cross section of the pillar 22 is a quadrangle.

Referring to FIG. 2, the branch points of the conveyor transport path are shown. Along with the branching of the conveyor transport path, the slit 22 is also branched, and the bending portion 51 is provided in the slit 22 at this branching point. The slit 22 near the branching point including the bent portion 51 is formed wide.

A plurality of types of auxiliary floorboards 52 having different lengths along the inner edge of the bent portion 51 (one reference numeral is attached for convenience) are arranged so as to project toward the outer edge of the bent portion 51. Are listed in. Tapered taper portions 53 are provided at both ends of the auxiliary floor plate 51.

Referring to FIGS. 3-5, one auxiliary floorboard.
Although 52 and a support mechanism 54 for this are shown, other auxiliary floorboards 52 are also supported by the support mechanism 54 having the same structure.

The auxiliary floor plate 52 includes a pair of vertical swing arms.
The tips of 61 are connected. A horizontal rotation shaft 62 is fixed to the base ends of both arms 61. A support cylinder 63 is fitted on the rotating shaft 62. The lower end of a vertical plate-shaped bracket 64 is fixed to the top of the support cylinder 63. bracket
A flange 65 is provided at the upper end of 64. Flange 65
Is applied to the lower surface of the edge of the slit 22, and a screw 66 penetrating the same is screwed into the lower surface of the slit 22.

A strip plate-shaped stopper 71 and a spring retainer 72 face each other with a bracket 64 in between and are abutted separately on both side surfaces of the bracket 64 at both edges in the middle of the length of both arms 61. Have been handed over to. Cushion materials 73 and 74 are attached in the middle of the lengths of the facing surfaces of the strip-shaped stopper 71 and the spring retainer 72, respectively. Support tube
A spring plate 75 is attached upright at a position near one end of 63 so as to face the spring retainer 72. Also,
An arm escape notch 76 is formed at an appropriate position on the edge of the slit 22.

As shown by the solid line in FIG. 4, when the stopper 71 is brought into contact with one side surface of the bracket 64 via the cushion material 73, the downward swing of the auxiliary floor plate 52 is restricted. In this state, the floor plate 21 and the auxiliary floor plate 52 are flush with each other. Further, in this state, the spring retainer 72 is separated from the spring plate 75. On the other hand, as shown by an imaginary line in FIG. 4, when the arm 61 rises right above the rotating shaft 62 and the auxiliary floor plate is projected above the floor plate 21 to stand upright, the spring retainer 72 causes the spring plate 72 to rise. 75 is pressed and bent, and the cushion member 74 of the spring presser 72 is brought into contact with the bracket 64.

In the steady state, the auxiliary floor plate 52 is in a horizontal posture, and the floor plate 21 and the auxiliary floor plate 52 are flush with each other. In this state, approximately half the width of the slit 22 is the auxiliary floorboard.
It is covered with 52.

When the carrier 19 is moved together with the free trolley 17, the column 41 of the yoke 35 is moved while being passed through the slit 22. When the pillar 41 reaches the position of the auxiliary floor plate 52, the pillar 41 abuts on one end tapered portion 53 of the auxiliary floor plate 52, and the auxiliary floor plate 52 is pushed upward by the pillar 41 against the spring plate 75 to stand up. Becomes The pillar 41 passes through the auxiliary floor plate 52 while being slidably in contact with the free edge portion of the auxiliary floor plate 52. When the pillar 41 has finished passing through the free edge portion of the auxiliary floor plate 52, the auxiliary floor plate 52 is swung downward by the spring plate 75 while being guided by the other end taper portion 53 of the auxiliary floor plate 52. 52 is returned to the horizontal position.

[0023]

According to the present invention, since the auxiliary floor plate is normally positioned at the lower limit and held in a state of being flush with the floor plate, the operator's foot is caught in the slit or the slit is formed in the pit. It is possible to prevent the danger that foreign matter may fall through it.

Further, since the auxiliary floor plate does not hinder the movement of the carrier, there is no fear of the carrier colliding with the auxiliary floor plate.

[Brief description of drawings]

FIG. 1 is a front view of a floor conveyor provided with a safety device according to the present invention.

FIG. 2 is a plan view of the conveyor.

FIG. 3 is a perspective view including a crushed section of the safety device.

FIG. 4 is a vertical cross-sectional view of the safety device.

FIG. 5 is a side view of the safety device.

[Explanation of symbols]

 11 Floor surface 12 Pit 14 Free rail 17 Free trolley 19 Carrier 21 Floor plate 22 Slit 34 Conveyor loading table 35 Yoke 52 Auxiliary floor plate 61 Arm 71 Stopper 75 Spring plate

Claims (1)

[Claims] 1. A pit 12 is provided on the floor surface 11, and the pit 12
A trolley traveling rail 14 is provided inside, the upper end opening of the pit 12 is closed by a floor plate 21 that is flush with the floor surface 11, and the floor plate 21 is provided with a slit 22 extending directly above the rail 14 in parallel with the rail 14. The carrier 19 is passed through the slit 22 and
In the floor conveyor having the yoke 35 that connects the 17 and the object placing table 34, the plurality of auxiliary floor plates 52 arranged along at least one edge of the slit 22 required section, and the auxiliary floor plates 52 A plurality of support arms 61, each of which is attached at least one to each other, and each of the auxiliary floor plates 52 is vertically swingable so as to move forward and backward with respect to the yoke movement path and be flush with the floor plate 21. , A stopper 71 for restricting the downward swing of each of the auxiliary floor plates 52 so that the lower limit is a state where the auxiliary floor plates 52 are flush with the floor plate 21, and an urging force for swinging the auxiliary floor plates 52 downward. The moving yoke 35 comes into contact with the auxiliary floor plate 52 at the lower limit position, whereby the auxiliary floor plate 52 is swung upward and is withdrawn from the yoke moving path. Done Safety equipment it is.