JPH0230557Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a break device for a lifting ramp for a shaft liner plate, and in particular, it is attached to the inner surface of a liner plate used for shaft excavation work, etc., and is installed in the middle of the lifting ramp. This invention relates to a resting device for a lifting ramp for a shaft liner plate, which is used as a resting place during lifting.

[Prior Art] During shaft excavation work, it is necessary to enter the liner plate being excavated in order to visually observe the condition of the ground being excavated and the progress of the excavation work. Therefore, ropes, rope ladders, or lifting ramps fixed to the inner peripheral surface of the liner plate have been used as lifting equipment.

[Problems to be Solved by the Invention] Incidentally, in the above-mentioned lifting equipment, a sturdy lifting ramp is mainly used. In addition, the number of stages of the lifting ramp will be increased depending on the depth of the shaft.
Rest devices are provided at predetermined intervals along the elevator ramp to ensure safety during the elevator operation.

However, in the above-mentioned rest device, since the device is formed firmly to ensure safety, the structure becomes complicated and the cost increases.
There is a disadvantage that the weight increases, making assembly difficult.

[Purpose of the invention] Therefore, in order to eliminate the above-mentioned disadvantages, the purpose of this invention is to simplify the structure by forming the support frame into a surrounding shape by members having an L-shaped cross section.
To provide a resting device for a lifting ramp for a shaft liner plate that can maintain sufficient structural strength, reduce cost, reduce weight, facilitate assembly, and allow safe and easy lifting.

[Means for solving the problem] In order to achieve this purpose, this invention forms the support frame in an encircling shape, and supports the distal end side facing the proximal end side from the proximal end side diagonally downward. A part of the support rod is fixed, and the other end of the support rod and the proximal end of the support frame are respectively screwed to the liner plate, and a hole is formed on the upper surface of the support frame beyond the through hole of the support frame. The rest opening/closing plate is characterized in that a large opening/closing plate for resting is placed thereon, and a pivot portion is provided on the tip side of the opening/closing plate for resting, so that the opening/closing plate for resting can be opened and closed only upwardly.

[Function] With the above-mentioned configuration, the opening/closing plate for resting is placed on the support frame during the lowering or ascending operation, and the user rests on this opening/closing plate. Further, when descending or ascending the step, the rest opening/closing plate placed on the support frame is opened upward to expose the through hole so that the step can be passed through.

[Example] Hereinafter, an example of this invention will be described in detail based on the drawings.

1 to 4 show examples of this invention. In FIG. 1, 2 is a foot pedal and 4 is a resting device. As shown in FIGS. 1 and 2, the foot stick 2 is made of a steel material with spiral anti-slip irregularities, and both ends thereof are fixed to the tips of the arc-shaped side rods 6. The lower end of this side rod 6 is bent to form a fixing piece 8, and a mounting hole 6a for inserting a bolt is bored therein. A receiving metal fitting 12 is attached to the outer surface of the side rod 6 for attaching a back support frame 10 (see FIG. 1) for preventing fall accidents.

When attaching the steps configured as described above to the liner plate 14, as shown in FIG.
The fixing pieces 8 are placed in contact with the upper and lower sides of the flange 14a, respectively, and the steps attached to the upper side of the flange 14a are oriented upward, while the steps attached to the lower side are oriented downward, that is, vertically symmetrically with respect to the flange 14a. In this state, the tightening bolt 16 is passed through and integrally tightened and fixed with a nut.

In this way, a plurality of steps are attached and fixed in a column inside the liner plate 14 using the joint bolts 16, thereby constructing an elevating ramp.

3 and 4 show the resting device 4, 1
8 is a support frame body, and 20 is an opening/closing plate for rest. The support body 18 is formed into a trapezoidal shape with its proximal end 18a being larger by an L-shaped member in cross section, and as is clear from FIGS. A through hole 22 is formed. That is, the support frame 18 is formed in a surrounding shape in plan view. A mounting hole 24 for inserting a bolt is bored on the base end side 18a. In addition, this support frame 18
As shown in FIG. 4, a support rod 26 is attached to support the distal end side 18b facing the proximal end side 18a from the diagonally downward proximal end side, and the other end of the support rod 26 is provided with a bolt (not shown) for insertion. Mounting holes are drilled. The upper end surface of the support frame 18 is formed substantially horizontally, and as shown in FIG. 20 are on board. Moreover, the opening/closing plate 20 may be a wire mesh or an iron plate. The opening/closing plate 20 has a pivot portion formed by a hinge 28 and is attached to the distal end side 18b of the support frame 18 so as to be openable and closable.

In order to arrange the break device 4 constructed as described above in the middle of the lifting ramp, as is clear from FIG. The support frame 18 is integrally tightened and fixed with a nut through the bolt 30. Further, the other end of the support rod 26 that supports the support frame 18 from diagonally below is fastened and fixed to the upper side of the flange 14a below the support frame 18.

Therefore, when descending the steps, after taking a short break on the opening/closing plate 20, place the foot on the step 2.
Grasp the upper step stick 2 with one hand, bend down with your body resting on the step, and use your free hand to open the opening/closing board 20 upwards as shown by the imaginary line in Figure 4. Alternatively, you can hook the tip of the opening/closing plate 20 with the instep of one of your feet and lift it up a little to open it, or you may use an auxiliary tool to open it.

Conversely, when going up a step, simply pushing up the opening/closing plate 20 from below allows the opening/closing plate 20 to open and pass through.

In FIG. 1, reference numeral 32 is a main rope that connects the body via a rope 34 to prevent accidents such as falling due to missing a step.

Thereby, the structure of the support frame can be simplified, and sufficient structural strength can be maintained by the L-shaped cross-sectional member. Furthermore, the cost can be reduced and the weight can be reduced, which is advantageous in practice.

[Effects of the invention] As explained in detail above, according to this invention, the support frame is formed into an encircling shape by members having an L-shaped cross section, so the structure can be simplified and sufficient structural strength can be achieved. can be maintained and the cost can be kept low. Furthermore, the device can be made lightweight, easy to assemble, and can be moved up and down safely and easily.

[Brief explanation of drawings]

Figures 1 to 4 show an embodiment of this invention. Figure 1 is a perspective view of a lifting ramp equipped with a resting device, Figure 2 is a perspective view of a step, Figure 3 is a plan view of the resting device, and Figure 4 is a perspective view of a lifting ramp equipped with a resting device. The figure is a side view thereof. In the figure, 2 is a footrest, 4 is a resting device, 6 is a side lever, 6a is a mounting hole, 8 is a fixed piece, 10 is a backrest lever,
12 is a receiving fitting, 14 is a liner plate, 14a is a flange, 16 is a tightening bolt, 18 is a support frame, 18a is a proximal end side, 18b is a distal end side, 20 is an opening/closing plate for resting, 22 is a through hole, 24 is a mounting hole, 26 is a support rod, 28 is a hinge, 30 is a tightening bolt, 32
is the parent network, and 34 is the lolip.

Claims (1)

[Scope of utility model registration request] The support frame is formed into an encircling shape, and a part of a support rod that is supported from the base end side diagonally downward is fixed to the distal end side facing the base end side, and the other end of this support rod and the support frame body are connected to each other. The proximal end side is screwed to the liner plate, and a break opening/closing plate larger than the through hole of the support frame is placed on the upper surface of the support frame, and a break opening/closing plate is placed on the tip side of the break opening/closing plate. 1. A rest device for a lift ramp for a shaft liner plate, characterized in that a pivot portion is provided so that the rest opening/closing plate can be opened and closed only upwardly.