JPH0826649A - Safety fence installation - Google Patents

Abstract

PURPOSE:To save installation works, prevent the safety fence from being moved and falling down, and thereby enhance safety. CONSTITUTION:The safety fence installation is provided with a trolley 20 having a front and a rear fixing mechanism 30 and 40 for fixing the fence over a floor, and with a safety fence 50 where one end section of the safety fence is connected to a pillar 51 erected over the trolley 20 in such a way as to be freely rotated and also moved up and down, and a plurality of fence bodies 52 and 53 furnished with feet 52 and 53 which are longer than the height of the rest section 21 of the trolley respectively, are connected in parallel in such a way as to be freely folded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety fence device capable of transporting and erecting a safety fence used for maintenance and inspection of escalators.

[0002]

2. Description of the Related Art Generally, when performing maintenance or inspection of a machine room provided below an entrance / exit of an escalator, a safety fence is set up around the opening of the machine room to prevent people from falling into the opening. To be

Conventionally, there is a safety fence of this type as shown in FIG. In FIG. 15, reference numeral 1 is an entrance / exit of the escalator, and a machine room 2 is provided below the entrance / exit 1.
Is provided. During maintenance and inspection of this machine room 2,
A lid (not shown) is opened, and a worker enters the machine room 2 through the opening 2a to perform work. At this time, the safety fence 100 is erected so that a person does not fall into the machine room 2 through the opening 2a.

Generally, the safety fence 100 is stored in a storage place different from the work place. Then, at the time of maintenance and inspection of the machine room 2, the worker carries the safety fence 100 from the storage location to the work location and arranges it. That is, as shown in FIG.
A foldable safety fence 100 is installed so as to surround the opening 2a of the machine room 2.

[0005]

In the conventional safety fence 100 having the above-described structure, an operator must manually carry it up from a remote storage location to a work location during maintenance and inspection of the machine room 2. Therefore, there is a problem that the work is lacking in convenience. In addition, since it has a structure in which it stands upright, if it is hit by the wind or a person, it will greatly move or fall from a predetermined standing position. For this reason, there is also a problem in that there is a risk that an accident may occur, such as a person tripping over the safety fence 100 that has moved or collapsed and falls. Further, in order to prevent the safety fence 100 from moving or falling, it is necessary to tie the safety fence 100 with a rope or attach a weight, which requires a long time for the standing work.

The present invention has been made to solve the above-mentioned problems, and it is possible to save labor in the installation work, and to prevent the safety fence from moving or falling, thereby ensuring safety. It is an object of the present invention to provide a safety fence device that can improve the safety.

[0007]

A safety fence device according to a first aspect of the present invention is a trolley having a fixing mechanism for fixing the pedestal on a floor, and one end of a stanchion erected on the trolley rotates and vertically moves. A safety fence that is movably connected and that has a plurality of fences each having legs longer than the height of the platform of the carriage and foldably connected side by side Is.

In the safety fence device according to the second aspect of the present invention, the safety fence can be folded so as to surround the mounting portion, and when the safety fence is folded, the lower end portion of the foot of each fence body is fitted into the fixing hole. Is provided on the mounting portion.

In the safety fence device according to a third aspect of the present invention, a friction member is fixed to the lower ends of the legs of the fence.

[0010]

According to the invention of claim 1, the safety fence can be folded and can be transported to the work site together with the trolley, and at the work site, the trolley is fixed by using the fixing mechanism,
The safety fence can be expanded and set up on the floor.

According to the second aspect of the present invention, the pair of safety fences are folded so as to surround the mounting portion, and the lower end portion of the foot is fitted into the fixing hole to be fixed, whereby the work tool or the like is enclosed in the space surrounded by the safety fence. Can be stored and transported to the work site.

According to the third aspect of the invention, the safety fence can be erected while the foot friction member is in contact with the floor to prevent the safety fence from moving.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. In each figure, the same or corresponding parts as those in FIG. 15 are designated by the same reference numerals, and the description thereof will be omitted.

Example 1. 1 is a sectional view showing a safety fence device according to a first embodiment of the present invention. The safety fence device 10 according to the first embodiment has a configuration in which a pair of left and right safety fences 50 (see FIG. 2) are attached to a carriage 20. The trolley | bogie 20 has the structure which attached the four casters 25 to the mounting part 21 in which a work tool etc. are mounted.

As shown in FIG. 2, fixing holes 22 (22-) for fixing the safety fence 50 are provided at the four corners of the upper surface of the mounting portion 21.
1 to 22-4) are provided. Also, each caster 2
As shown in FIGS. 3 and 4, 5 has a structure in which a rubber wheel 26 is rotatably supported by two wheel holding plates 28.

As shown in FIG. 5, such a trolley 20 is provided with a rear fixing mechanism 30 as a first fixing mechanism and a front fixing mechanism 40 as a second fixing mechanism. The rear fixing mechanism 30, as shown in FIG.
1 is a mechanism for fixing the rear wheel 26. Specifically, as shown in FIG. 3, a plate 31 is provided in the central portion on the lower rear side of the carriage 20, and a shaft 32 is rotatably attached to the plate 31. Also, shaft 3
A lever 33 is fixed to the center of the shaft 2, and a pair of leaf springs 34 is attached to both ends of the shaft 32. A spring 35 is interposed between the mounting portion 21 and the pair of leaf springs 34, and the pair of leaf springs 34 are urged downward.

The lever 33, as shown in FIG.
The plate 31 is inserted into an L-shaped groove 31 a formed in the plate 31. The lever 33 is pushed downward along the groove 31a against the urging force of the spring 35, and the groove 31a
It can be hung on the locking portion 31b. As a result, as shown in FIG. 5, the wheel 26 can be unfixed. Further, when the lever 33 is removed from the locking portion 31b,
As shown in FIG. 6, the pair of leaf springs 34 are pushed down by the urging force of the spring 35, and the wheel 26 is fixed by the frictional force between the leaf spring 34 and the wheel 26.

The front portion fixing mechanism 40 is a mechanism for fixing the front portion of the carriage 20. Specifically, as shown in FIG. 5, a support shaft 41 is provided in the center of the lower part of the front portion of the mounting portion 21, and a stopper 42 is rotatably attached to the support shaft 41. The stopper 42 has its front end bent downward, and an abutment body 43 made of a material such as rubber having a large friction coefficient is fixed to the front end thereof.

In addition, at a portion corresponding to the mounting of the stopper 42,
As shown in FIG. 4, a clip 45 is attached, and the lifted stopper 42 is sandwiched by the clip 45. As a result, the stopper 42
The front part of the trolley | bogie 20 can be fixed by detaching from the clip 45 and making the contact body 43 contact | abut on the floor 3 previously.

On the other hand, as shown in FIGS. 1 and 2, the safety fence 50 is connected to a main fence body 52 (52-1, 52-2) and a hinge 55 to the main fence body 52 so as to be openable and closable. Sub fence 53
(53-1, 53-2). Main fence 5
2 and the sub fence 53 are set to have the same structure. Specifically, the main fence body 52 and the sub fence body 53 are frames 52b and 53b in which plastic plates 52a and 53a are fitted, respectively.
And has a structure in which feet 52c and 53c are extended below the front of the frames 52b and 53b.

Rubbers 52d and 53d as friction members are fixed to the tips of the feet 52c and 53c, respectively. Frame 52 having such feet 52c, 53c
The width L of b and 53b is between the front and rear fixing holes 22 (22-1,
22-2, 22-3 and 22-4). The length of the feet 52c and 53c is
It is set to be slightly larger than the height from the floor 3 to the upper surface of the mounting portion 21.

The main fence 52 is attached to a pair of columns 51 standing upright on both sides of the rear portion of the mounting portion 21 so as to be vertically movable and rotatable. Specifically, as shown in FIG. 1 and FIG. 7, a pair of connecting pipes 51a are vertically movably and rotatably fitted into a support column 51, and upper and lower portions of a rear portion of a frame 52b of a main fence 52 are connected to each other. It is attached to the attachment portion 51b of the pipe 51a. In this way, the rear plate 59 is attached between the pair of columns 51 to which the main fence 52 is attached (FIG. 2).

Next, the operation will be described. When the maintenance and inspection work of the machine room 2 shown in FIG. 1 is performed, the safety fence device 10 is moved from a storage location (not shown) to near the machine room 2. At this time, as shown in FIG. 8, the lever 33 of the rear part fixing mechanism 30 is pushed down along the groove 31a of the plate 31, and is hooked on the locking part 31b, so that the wheels 2 of the caster 25 are locked.
6 can be freely rotated, and the front fixing mechanism 40
The stopper 42 is lifted up and fitted into the clip 45.

Further, the safety fence 50 is folded and fixed on the carriage 20 as shown in FIG. That is,
Fixing holes 22-2, 2 in which the legs 52c of the main fence 52 are indicated by broken lines
The legs 53c of the sub-fence body 53 folded back to the rear face plate 59 side are fitted into the fixing holes 22-1 and 22-4 while being fitted into 2-3. As a result, the upper surface of the trolley 20 is covered by the safety fence
Then, the rear surface plate 59 is surrounded by a U-shape.

In this state, a work tool or the like is placed on the mounting portion 21 of the carriage 20, the carriage 20 is moved to the vicinity of the opening 2a of the machine room 2 shown in FIG. 1, and a lid (not shown) is opened from the opening 2a. After removing, the safety fence 50 is erected.

In this work, first, the front and rear parts of the carriage 20 are fixed by the rear fixing mechanism 30 and the front fixing mechanism 40. That is, as shown in FIG. 10, the lever 33 of the rear fixing mechanism 30 is disengaged from the locking portion 31b of the plate groove 31a. Then, the pair of leaf springs 34 are pushed down by the biasing force of the spring 35, and the tip end portions of the pair of leaf springs 34 press the wheel 26 from above by the biasing force of the spring 35 and the spring force of the pair of leaf springs 34. As a result, a frictional force acts between the rubber wheel 26 and the floor 3, and the rear portion of the truck 20 is fixed by the rear fixing mechanism 30.

Further, the stopper 42 of the front fixing mechanism 40 is removed from the clip 45, and the abutment body 43 thereof is abutted on the floor 3. As a result, the front portion of the carriage 20 is fixed by the frictional force between the contact body 43 of the stopper 42 and the floor 3. As a result, the carriage 20 is in a fixed state against an external force in the front, rear, left, and right directions.

After such fixing work, the safety fence 50 is opened. That is, as shown in FIG. 10, the main fence body 52 and the sub fence body 5
3 and the foot 52c and 53c are fixed to the fixing hole 22.
2 and the main fence body 52 and the sub fence body 53 as shown in FIG.
And are rotated outward with respect to the support column 51 and lowered. Then, as shown in FIG. 11 and FIG. 12, the sub fence 53 is opened, and the main fence body 52-1 and the sub fence body 53-1 surround the left side portion of the opening 2a, and the main fence body 52- 2 and the sub fence 53-2 surround the right side of the opening 2a. As a result, the opening 2a is completely surrounded from the outside by the rear plate 59 on the carriage 20 and the pair of safety fences 50.

In this state, even if the external force F1 is applied to the rear face plate 59 by a person or the wind, the trolley 20 is fixed by the action of the rear fixing mechanism 30 and the front fixing mechanism 40. The safety fence 50 does not move or fall. Further, even when the external force F2 is applied to the safety fence 50, the rubber 52d of the feet 52c, 53c,
Since 53d produces a frictional force with respect to the floor 3, it hardly moves.

After the maintenance and inspection work of the machine room 2, the safety fence 50 is refolded as shown in FIG.
After mounting the work tool and the like on the trolley 20, the rear fixing mechanism 30 and the front fixing mechanism 40 are released, and the safety fence device 10 is transported to the storage location.

As described above, according to the safety fence device of the first embodiment, since the safety fence 50 can be carried together with the work tools and the like, the work of carrying the work tools and the work of carrying the safety fence can be carried out in one step. This can be done in one operation, which can save labor in installation work.

The carriage 20 is fixed on the floor 3 by the rear fixing mechanism 30 and the front fixing mechanism 40, and the feet 52c and 53c of the safety fence 50 are fixed on the floor 3 by the rubbers 52d and 53d. Therefore, the work of fixing the safety fence by tying it with a rope or attaching a weight can be omitted. As a result, the safety fence erection work can be performed quickly in a short time, and also in this respect, the labor can be saved.

Example 2. Next, a second embodiment of the present invention will be described with reference to FIG.
It will be described based on 3. The safety fence device of the second embodiment is different from the first embodiment in that the safety fence device has a structure capable of preventing a work tool or the like mounted on the carriage 20 from falling. That is, the main fence body 52-1 to which the sub fence bodies 53-1 and 53-2 are connected,
The reference numeral 52-2 is attached to a pair of columns 51 standing on the mounting portion 21 so as to be vertically movable and rotatable. The width of the main fence body 52-1 is set to be slightly shorter than the width of the main fence body 52-2, and correspondingly, the fixing hole 23 (23-
1, 23-2) are set.

Specifically, the fixing hole 23-1 is L-shaped, and the foot 52c-1 of the main fence 52-1 and the main fence 5 are provided.
The foot 53c-2 of the sub fence 53-2 bent inward at the tip of 2-2 can be fitted therein. Further, the fixing hole 23-2 is horizontally long, and the foot 52c-2 of the main fence body 52-2 and the foot 53c of the sub fence body 53-1 bent inward at the tip of the main fence body 52-1. -1 and -1 can be fitted.

Here, in the first embodiment, the work tool or the like can be carried by the trolley 20 in the state shown in FIG. 9, but in this state, the front is open, so the trolley 20 is suddenly stopped. If this is done, the work tool etc. may fall from the front. However, according to the safety fence device of the second embodiment, the trolley 20 is completely surrounded by the safety fence 50 from all sides. Therefore, if work tools and the like are put in this space, work can be performed when the vehicle suddenly stops. Tools are trolley 20
Never fall from.

Example 3. Next, a third embodiment of the present invention is shown in FIG.
4 will be described. The safety fence device of the third embodiment has one
This is different from the first and second embodiments in that the safety fence 50 is configured by connecting two auxiliary fence bodies 53 and 54 to one main fence body 52. That is, as shown in FIG. 14, the sub-fence bodies 53-1 and 53-2 are attached to the front ends of the sub-fence bodies 53-1 and 53-2 via the hinge 56.
Sub fences 54-1 and 54-2 having the same structure as are foldably connected.

By expanding the safety fence 50, it is possible to completely enclose the opening 2a from the outside while securing a wide working area by the safety fence 50 as shown in the figure.

The present invention is not limited to the above-mentioned embodiments, but various embodiments are possible within the scope of the gist of the invention. For example, three or more auxiliary fence bodies may be connected to one main fence body 52 to secure a large work area.

In each of the above embodiments, both the rear fixing mechanism 30 as the first fixing mechanism and the front fixing mechanism 40 as the second fixing mechanism are provided. However, if the carriage 20 can be fixed. , Either one may be sufficient. Further, the specific structure of the fixing mechanism is not limited to the above embodiments.

[0040]

As described above, according to the safety fence device of the invention of claim 1, the safety fence can be folded and can be transported to the work site together with the trolley, which facilitates transportation of the safety fence. The effect that labor saving of installation work can be achieved is obtained. In addition, at the work site, the trolley can be fixed on the floor using the fixing mechanism, which prevents the safety fence from moving or falling due to external forces such as people or wind, and therefore ties the safety fence with ropes or weights. Since the work of attaching the safety fence can be omitted, the work of installing the safety fence can be simplified, and the safety can be improved.

According to the safety fence device of the second aspect of the invention, since the safety fence can surround the placing portion of the trolley, in addition to the same effect as the invention of the first aspect, the placing portion is also provided. It is possible to store work tools and the like in the space surrounded by the upper safety fence, facilitate transport work, and improve workability.

Further, according to the safety fence device of the third aspect of the invention, since the friction member is fixed to the tip of the foot, in addition to the same effect as the invention of the first aspect, the safety fence is also provided. Can be more reliably fixed, and the safety can be further improved.

[Brief description of drawings]

FIG. 1 is a side view showing a safety fence device according to a first embodiment of the present invention.

FIG. 2 is a plan view showing the carriage of FIG.

3 is a rear view of the truck of FIG. 1. FIG.

4 is a front view of the trolley of FIG. 1. FIG.

5 is a side view showing a released state of each fixing mechanism of the bogie of FIG. 1. FIG.

6 is a side view showing a fixed state of each fixing mechanism of the bogie of FIG. 1. FIG.

FIG. 7 is a plan view showing how the main fence of FIG. 1 is attached to a column.

FIG. 8 is a side view showing a state of the apparatus of FIG. 1 during transportation.

FIG. 9 is a plan view of FIG. 8;

FIG. 10 is a side view showing a state where the safety fence of FIG. 8 is lifted.

11 is a plan view showing a state in which a safety fence of the apparatus of FIG. 1 is erected.

FIG. 12 is a side view of FIG. 11.

FIG. 13 is a plan view showing a safety fence device according to a second embodiment of the present invention.

FIG. 14 is a plan view showing a safety fence device according to a third embodiment of the present invention.

FIG. 15 is a perspective view showing an example of a conventional safety fence.

[Explanation of symbols]

3 floors, 20 carts, 23-1, 23-2 fixing holes, 3
0 rear fixing mechanism, 40 front fixing mechanism, 50 safety fence, 51 prop, 52 main fence body, 53 sub fence body, 52
c, 53c foot, 52d, 53d rubber (friction member).

Claims (3)

[Claims] 1. A dolly having a fixing mechanism for fixing the dolly on a floor, one end of which is rotatably and vertically movably connected to a column which is erected on the dolly, and a mounting portion of each of the dolly. A safety fence device comprising: a safety fence in which a plurality of fence bodies provided with legs having a length equal to or higher than the height are connected side by side in a foldable manner. 2. The safety fence is foldable so as to surround the mounting portion, and when the safety fence is folded, a fixing hole into which the lower end portion of the foot of each fence body is fitted is provided on the mounting portion. The safety fence device according to claim 1, wherein the safety fence device is provided. 3. The safety fence device according to claim 1, wherein a friction member is fixed to the lower end portion of the foot of the fence body.