JP2009208917A - Safety fence on elevator car - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safety fence on an elevator car sufficiently securing the height of the safety fence which can be gripped by a worker as a handrail and suppressing increase in a distance between a car and a ceiling part of a hoistway. <P>SOLUTION: The safety fence on the elevator car is provided with a pair of fence base parts 5 rotatably journaled on an upper beam 31 of a car frame 3 between the erected state and the folded state and arranged separately from each other in positions preventing interference with each other when folded to the inner side; and with extension parts 6 mounted to the upper part of the fence base parts 5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a safety fence on an elevator car, and more particularly to a safety fence capable of securing a handrail height during work.

  In order to ensure smooth and safe operation of the elevator, not only regular maintenance and inspection, but also when the cumulative operation time reaches a predetermined time, check the operating status of each device and wear parts. The state is inspected, and adjustment and replacement work is performed by the worker as necessary. Recent elevators have various options according to their needs. Many of these options fulfill their functions by installing some peripheral device outside the car. For example, various equipment such as a cooler body, a security camera power box, and a hard disk storage device are installed on the car in consideration of workability during maintenance and inspection work. In order to perform such maintenance and inspection work, it is necessary to install a safety fence on the car to ensure the safety of the worker.

As a conventional safety fence, one fixed on a car is known (see, for example, Patent Document 1). In the safety fence fixed in this way, the work space is limited when various facilities are mounted on the car. For this reason, there is a problem that the height of the safety fence on the car becomes insufficient when an attempt is made to secure the work space of the worker using the equipment installed on the car as a work table. Therefore, it is conceivable to install a safety fence that is long in the vertical direction on the car. However, in recent years, space saving of elevators has tended to reduce the clearance between the car and the ceiling of the hoistway. The fence cannot be adopted. In addition, it is conceivable to fold the safety fence on the car, but when the safety fence is raised, the safety fence frames overlap each other when folded, or the height of the folded frame itself is high. Even in this case, there is a problem that the clearance between the carriage and the ceiling of the hoistway cannot be reduced.
JP 2003-95554 A

  The problem to be solved by the present invention is that even if various facilities are installed on the car, the height of the safety fence that can be grasped as a handrail by the operator can be secured sufficiently, and the car is raised and lowered. The object is to provide a safety fence on the elevator car that does not increase the gap with the ceiling of the road.

  Therefore, a feature of the present invention is a safety fence on the elevator car, which is pivotally supported at the uppermost part of the elevator car so as to be able to rotate and displace between the standing state and the folded state, and folded inward from each other. The gist of the present invention is to include a pair of fence bases arranged apart from each other so as not to interfere with each other and an extension part attached to the upper part of the fence base.

  When various facilities are mounted on the car, the uppermost part of the car is preferably an upper beam of a car frame that holds the car. The extension part may be housed inside the fence base, or may be pivotally supported on the upper part of the fence base. In this case, the extended portion is fixed in a standing state on the upper portion of the fence base.

  According to the present invention, even when various facilities are installed on the car, the height of the safety fence that can be grasped as a handrail by an operator can be secured sufficiently, and the ceiling of the car and the hoistway can be secured. A safety fence on the elevator car that does not increase the gap between the parts.

  Hereinafter, the details of the safety fence on the elevator car according to each embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
1 to 3 show a safety fence on an elevator car according to a first embodiment of the present invention. In the present embodiment, a pair of safety fences 1 are provided on the upper beam 31 that is the uppermost part of the car frame 3 of the elevator car 2 at a predetermined distance from each other.

  As shown in FIGS. 1 and 2, various facilities such as a cooling device body 7 are mounted on the upper surface of the car 2. The uppermost part of these various facilities is set lower than the upper beam 31 of the car frame 3. Therefore, providing the safety fence 1 on the upper beam 31 is easy to install because it is not interfered with these facilities, and ensures safety when an operator works on these facilities. It is also effective in doing.

  The safety fence 1 includes an attachment portion 4 fixed on the upper beam 31, a fence base portion 5 that is pivotally supported at one end of the attachment portion 4, and an end portion that is rotatable at the other end of the fence base portion 5. And an extension portion 6 that is pivotally supported.

  As shown in FIG. 3, the attachment portion 4 includes a plate-like attachment seat plate 41 having a predetermined length. The mounting seat plate 41 is made of, for example, a durable metal material. The mounting seat plate 41 is arranged so as to intersect at right angles to the longitudinal direction of the upper beam 31 of the car frame 3. The mounting seat 41 is fixed to the upper surface of the upper beam 31 by fixing means such as welding or bolt-nut tightening.

  As shown in FIG. 3, at both ends in the longitudinal direction of the mounting seat plate 41, grooves 42a are formed along a direction perpendicular to the longitudinal direction (a direction parallel to the upper beam 31). The fence base support portion 42 is integrally provided.

  As shown in FIG. 3, the fence base 5 is a substantially rectangular frame member. The fence base 5 includes two parallel upper and lower horizontal frame members 51 and 52 having a length within a range that can be used by an operator in a direction perpendicular to the longitudinal direction of the upper beam 31. Two vertical frame members 53 and 54 which are arranged so as to integrally connect both ends of the upper horizontal frame member 51 and the lower horizontal frame member 52 and have a vertical length shorter than the height dimension of the entire safety fence 1, and the lower horizontal frame member The intermediate vertical frame member 55 protrudes downward from an intermediate portion 52 (a central portion in the present embodiment) when standing. The vertical frame member 53 and the intermediate vertical frame member 55 are set so as to protrude with the same length with respect to the lower horizontal frame member 52.

  The lower ends of the vertical frame member 53 and the intermediate vertical frame member 55 are bent portions 53a and 55a (not shown) of the same length bent at a right angle in the same direction. And it is rotatably supported by the support shaft 43 in the vicinity of one end in the groove direction of the fence base support portion 42 in the vicinity of the front ends of the bent portions 53a and 55a (not shown). Then, when the fence base portion 5 stands upright by rotating around the support shaft 43 as a rotation axis, the bottom surface of the bent portion 53a comes into contact with the bottom surface of the groove 42a of the fence base support portion 42 and stands up stably. Can be kept. Although not shown, a lock mechanism is provided that can hold the fence base 5 in an upright state and can hold the fence base 5 in a folded state.

  And the vicinity of the front-end | tip part of the vertical frame member 53 of a pair of fence base part 5 which mutually opposes, and the bending parts 53a and 55a (not shown) of the intermediate | middle vertical frame member 55 mutually of the fence base support part 42 to which each is attached. It is pivotally supported by a support shaft 43 in the vicinity of the opposite end.

  In the present embodiment, a pair of mounting portions 4 are disposed at a predetermined interval in the length direction of the upper beam 31. This interval is a direction in which the fence bases 5 face each other as shown in FIG. It is set so that the fence bases 5 do not overlap each other when they are brought down. In addition, by shortening the height dimension of the fence base 5, it is possible to set the distance between the mounting seats 41 to be shorter. That is, the pair of fence bases 5 is pivotally supported between the standing state and the folded state so as to be rotationally displaceable, and is arranged at a position that does not interfere with each other when folded inward.

  As shown in FIG. 2, in this embodiment, when the pair of fence bases 5 is tilted, the lengths of the bent portions 53 a and 55 a (not shown) of the vertical frame member 53 and the intermediate vertical frame member 55 are the same. However, in order to avoid that the part close to the fence base support part 42 in the fence base part 5 is lifted from the upper beam 31, the fence base support parts 42 at both ends of the mounting seat 41 are made a predetermined length from the upper surface of the upper beam 31. It is set so that it is located just below.

  As shown in FIG. 3, the extension 6 is a rectangular panel having a size that can be accommodated in the frame of the fence base 5. In addition, the extension part 6 is not restricted to a panel, Of course, like the fence base part 5, it may be a frame-like handrail.

  One end edge side of the extended portion 6 is pivotally supported on the upper portion of the vertical frame members 53 and 54 of the fence base 5 by a support shaft 56. In addition, the one end edge side of the extended part 6 is formed as the thin part 6a, and the extended part 6 can stand in the extending direction of the fence base 5 along the side surface of the upper horizontal frame member 51 of the fence base 5. Yes. As shown in FIG. 1, the region other than the thin portion 6 a is a thick portion 6 b having a thickness similar to that of the upper horizontal frame member 51. Although not shown, a lock mechanism is provided that can hold and release the extended portion 6 in a state where the extended portion 6 stands in the extending direction of the fence base 5.

  And since the extension part 6 can be accommodated in the frame of the fence base part 5 as mentioned above, the fence base parts 5 are mutually inwardly folded in the state shown by the solid line in FIG. By tilting, the safety fences 1 can be folded flat on the upper beam 31 without overlapping each other as shown in FIG.

  In the safety fence 1 according to the present embodiment, as described above, the height of the safety fence 1 can be sufficiently secured on the upper beam 31, so that the worker can check the cooling device main body 7 on the cage at the time of inspection or the like When working on the top, a worker in a high position can grasp and secure safety. Moreover, since the expansion part 6 can be folded in the state accommodated in the fence base part 5, it is not necessary to ensure a large gap between the upper beam 31 and the ceiling part of the hoistway, and it is necessary to lengthen the hoistway vertically. Disappear. Therefore, if the safety fence 1 on the elevator car according to the present embodiment is used, a machine room is provided above the hoistway as well as a so-called machine roomless type elevator in which a drive system is arranged in the upper part of the hoistway. The provided elevator is advantageous in terms of space saving.

(Second Embodiment)
FIGS. 4-8 has shown the safety fence on the elevator car which concerns on the 2nd Embodiment of this invention. The safety fence 1A of the present embodiment differs from the safety fence 1 according to the first embodiment only in the configuration of the extension portion 6A, and the other configuration is the same as that of the first embodiment, so the extension portion 6A. Only explained. Note that the same parts as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  6 A of expansion parts are comprised with a rectangular-shaped panel, and are provided with a pair of clamp part 61 in the one end edge side. The clamp part 61 extends from one end edge of the extension part 6A, and the engagement panel part 62 is bent so that the lower end part is along the lower surface of the upper horizontal frame member 51 or the lower horizontal frame member 52 of the fence base 5; A knob 63 screwed into the bent portion of the engagement panel 62.

  The clamp 61 is expanded by rotating and tightening the knob 63 in a state where the upper horizontal frame member 51 or the lower horizontal frame member 52 is stored in the storage space of the bent portion of the engagement panel 62. The part 6 </ b> A can be fixed to the fence base 5. As shown in FIGS. 4, 5, and 7, when the clamp part 61 is attached to the upper horizontal frame member 51, the extended part 6 </ b> A stands and functions as the safety fence 1 </ b> A.

  As shown in FIG. 6, when the clamp portion 61 is attached to the lower horizontal frame member 52, the extended portion 6 </ b> A is housed in the fence base 5. When removing the extension 6A from the fence base 5, the knob 63 may be rotated to loosen the tightening.

  When the work is not performed, as shown in FIG. 8, the fence bases 5 may be folded inward as in the first embodiment.

  In addition, since the safety fence 1 of this Embodiment is a structure which the expansion part 6A isolate | separates from the fence base 5, as shown in FIG. 7, the chain | strand as a cable body which moores the fence base 5 and the expansion part 6A is shown. 8 is provided. In addition, in this Embodiment, although the chain | strand 8 was used as a rope body, you may use a rope, a wire, etc.

  The safety fence 1A according to the second embodiment has been described above, but other configurations are the same as those of the first embodiment.

  Also in this embodiment, since the height of the safety fence 1 can be sufficiently secured on the upper beam 31, when an operator rides on the air conditioner main body 7 etc. on the car at the time of inspection, An operator at a high position can grasp and secure safety. Further, since the extended portion 6 can be separated and stored in the fence base 5, the safety fence 1 </ b> A does not overlap when folded as shown in FIG. 8, and the upper beam 31 and the ceiling of the hoistway 10 are not overlapped. It is not necessary to ensure a large gap with the portion 10a, and it is not necessary to lengthen the hoistway 10 up and down. Therefore, if the safety fence 1A on the elevator car according to the present embodiment is used, a so-called machine roomless type elevator in which a drive system (not shown) is arranged in the upper part of the hoistway 10 is of course raised and lowered. An elevator provided with a machine room above the path 10 is also advantageous in terms of space saving.

(Modification of the second embodiment)
9 and 10 show a modification of the second embodiment.

  In this modification, a limit switch 9 is provided as a safety switch at the lower edge of the extension 6A. The limit switch 9 includes a rod portion 9a that protrudes downward from the lower edge of the expansion portion 6A, and performs switching when the rod portion 9a is pushed. In this modification, when the rod portion 9a is pushed, a safety circuit (not shown) prepared separately is set to work. The safety circuit controls the drive system and the like so as not to perform a normal operation in which the car moves up and down.

  Therefore, when the extended portion 6A is assembled to the upper horizontal frame member 51 of the fence base 5, the rod portion 9a is pressed and the rod portion 9a is retracted. In this case, the tip of the rod portion 9 a comes into contact with the upper surface of the upper horizontal frame member 51.

  On the other hand, when the expansion portion 6A is housed in the fence base 5 and the knob 63 of the clamp portion 61 is tightened, the rod portion 9a is pressed against the upper surface of the lower horizontal frame member 52, so that the lower horizontal frame member 52 On the upper surface, a hole 52a for opening the rod portion 9a and preventing the rod portion 9a from being pressed is opened. For this reason, when 6 A of expansion parts are accommodated in the fence base 5, it can transfer to a normal driving | operation without a safety circuit working. Although not shown, a safety switch may be provided on the side of the fence base 5 so that the safety circuit works when the fence base 5 is folded.

(Other embodiments)
It should not be understood that the descriptions and drawings which form part of the disclosure of the above-described embodiments limit the present invention. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

  For example, in each of the above-described embodiments, the safety fence is installed on the car frame. However, when there are few facilities to be mounted, the safety fence may be installed on the upper surface of the car 2.

The front view which shows the state which stood the safety fence on the elevator car which concerns on the 1st Embodiment of this invention. The front view which shows the state which folded the safety fence on the elevator car which concerns on the 1st Embodiment of this invention. The side view which shows the state which folded only the expansion part of the safety fence on the elevator car which concerns on the 1st Embodiment of this invention. The front view which shows the state which stood up the safety fence on the elevator car which concerns on the 2nd Embodiment of this invention. The side view which shows the state which stood up the safety fence on the elevator car which concerns on the 2nd Embodiment of this invention. The front view which shows the state which accommodated the extended part of the safety fence on the elevator car which concerns on the 2nd Embodiment of this invention in the fence base. The side view which shows the state which stood up the safety fence on the elevator car which concerns on the 2nd Embodiment of this invention. The front view which shows the state which folded the safety fence on the elevator car which concerns on the 2nd Embodiment of this invention. The side view which shows the state which stood up the safety fence which concerns on the modification of the 2nd Embodiment of this invention. The side view which shows the state which accommodated the extended part of the safety fence which concerns on the modification of the 2nd Embodiment of this invention in the fence base.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1A Safety fence 3 Car frame 4 Attaching part 5 Fence base 6, 6A ... Expansion part 6a Thin part 6b Thick part 7 Cooling device body 8 Chain (strand body)
9 Limit switch (safety switch)
9a Rod part 10 Hoistway 10a Ceiling part 31 Upper beam 41 Mounting seat 42 Fence base support part 42a Groove 43 Support shaft 51 Upper horizontal frame member 52 Lower horizontal frame member 52a Hole 53 Vertical frame member 53a Bending part 55 Intermediate vertical frame Member 56 Support shaft 61 Clamp part 62 Engagement panel part 63 Knob

Claims (7)

A pair of fence bases that are pivotally supported between the standing state and the folded state so as to be rotationally displaceable at the top of the elevator car, and are arranged apart from each other when they are folded inward;
An extension attached to the top of the fence base;
A safety fence on an elevator car characterized by comprising   The safety fence on the elevator car according to claim 1, wherein the uppermost part of the car is an upper beam of a car frame that holds the car.   The safety fence on an elevator car according to claim 1 or 2, wherein the extension part can be stored inside the fence base.   The said extension part is pivotally supported by the upper part of the said fence base part, and is fixed in the state which stood up on the upper part of the said fence base part, The Claim 1 thru | or 3 characterized by the above-mentioned. Safety fence on the elevator car.   The extension portion includes a fixing knob that is fixed in a standing state on the fence base, and the fixing knob can be fixed to the fence base in a state in which the extension portion is housed inside the fence base. The safety fence on the elevator car as described in any one of Claims 1 thru | or 4 characterized by the above-mentioned.   The safety fence on the elevator car according to any one of claims 1 to 5, wherein the extension part is moored by a cable body on the car side.   The said extension part is provided with the safety switch which switches a safety circuit so that normal operation of the said cage may not be performed in the state which stood and fixed to the upper part of the said fence base part. A safety fence on an elevator car according to any one of the above.

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