JP4471615B2 - Elevator guard device - Google Patents

Description

  TECHNICAL FIELD The present invention relates to an elevator guard device in which a guard plate called a toe guard (or apron) is provided on the lower surface of the front side of an elevator car. The present invention relates to an elevator guard device in which abnormal noise or vibration noise due to swinging of the movable plate is prevented in advance when a so-called telescopic structure is employed.

In Patent Document 1, which is a representative example of this type of technology, as a guard plate structure referred to as a toe guard, a fixed plate and a movable plate are overlapped in a vertically stretchable structure, and as a result, the entire guard plate The thing whose height dimension of can be reduced is disclosed. According to this structure, the guard plate has the maximum height during normal operation (maximum extended state). For example, even if the stop position accuracy of the car varies, It is possible to prevent the occurrence of a gap that can enter the toe of the elevator user at the landing. On the other hand, for example, when the pit depth is set shallower than the maximum height dimension of the guard plate, and the car is lowered to the lowest position, the lower end of the movable plate is brought into contact with the pit floor surface. Thus, the movable plate is relatively pushed up, and as a result, the height dimension of the entire guard plate is reduced (shrinked), thereby preventing the guard plate from being damaged.
JP 2002-302370 A

  However, in the guard device disclosed in Patent Document 1, the movable plate is merely guided and supported so as to be movable up and down with respect to the fixed plate, so that the movable plate swings or vibrates as the car moves up and down. However, vibration noise or abnormal noise is generated between the fixed plate and the passenger, which may cause discomfort.

  The present invention has been made paying attention to such a problem, and suppresses the swinging or vibration of the movable plate accompanying the lifting and lowering operation of the elevator car by constantly bringing the movable plate into close contact with the fixed plate side. Thus, an elevator guard device is provided that prevents unpleasant vibrations and abnormal noises from occurring.

  According to the first aspect of the present invention, a guard plate protruding downward is provided on the lower surface on the front side of the elevator car, and the guard plate includes a fixed plate suspended from the lower surface on the front side of the car, and the fixed plate. It is assumed that the elevator guard device has a structure in which the height of the entire guard plate can be reduced by being formed by a movable plate guided and supported by the plate so as to be movable up and down.

  In addition, on both sides of either the fixed plate or the movable plate, there are provided oblique slide guide portions that are inclined downward from the rear side of the car to the front side in a side view, The movable plate is guided and supported along the slide guide portion so that the movable plate can be moved up and down while moving toward and away from the fixed plate in the longitudinal direction of the car. The movable plate is in pressure contact with the slide guide portion while being overlapped with each other, and the lowest position is regulated by being pressed against the fixed plate.

  As the slide guide portion, for example, as described in claim 2, side flange portions are bent and formed on both side portions of the fixed plate, and the side flange portion is directed from the back side to the front side of the car in a side view. An oblique guide slot portion having a downward slope is formed as a slide guide portion, and the movable plate is guided and supported so as to be movable up and down along the guide slot portion. Of course, it is also possible to adopt a rail-like one as the slide guide portion, but the above guide slot type is advantageous in terms of processability and processing cost.

  It should be noted that the same function is exhibited even if the above-described slide guide portion or guide slot portion is provided on the movable plate side instead of the fixed plate side.

  Further, as the relative positional relationship between the movable plate and the fixed plate, as described in claim 3, the upper end of the movable plate and the lower end of the fixed plate are bent toward the mating plate, respectively. Are brought into contact with the mating plate so that the lowest position of the movable plate with respect to the fixed plate is regulated. By doing so, the movable plate and the fixed plate do not come into contact with each other but each stopper comes into contact with the mating plate so that the lowest position of the movable plate with respect to the fixed plate is regulated.

  With regard to the above stoppers, the same function can be achieved by bringing only one of the upper and lower stoppers into contact with the mating plate, but the upper and lower stoppers are respectively used for the intended purpose and ensuring the stability of the contact portion. It is desirable to contact the mating plate.

  Therefore, according to the first to third aspects of the present invention, during the normal operation, the movable plate is lowered along the oblique slide guide portion or guide slot portion by its own weight, and the guard plate as a whole is in the maximum extension state. In this maximum extended state, since the slide guide portion or guide slot portion is slanted, the movable plate's own weight is converted into a mutual pressure contact force in the approaching / separating direction (front / rear direction of the car) with the fixed plate. The fixed plate and the movable plate are in direct pressure contact with the slanted slide guide or guide slot, or the upper and lower stoppers are in pressure contact with the mating plate, so that the lowermost position of the movable plate relative to the fixed plate is Being regulated, the movable plate is held in that position.

  In this state, the fixed plate is sandwiched in a so-called wedge-shaped space formed by the vertical wall surface of the fixed plate and the oblique slide guide portion or guide slot portion, and the vertical wall surface of the fixed plate and the oblique slide guide portion or guide slot portion. For both of these, the movable plate itself is in a state of being in pressure contact with its own weight.

  In this way, during normal operation, the movable plate is sandwiched in the wedge-shaped space on the fixed plate side, and the mutual pressure force between the fixed plate and the movable plate in the longitudinal direction of the cage acts on the cage. As a result, it is possible to prevent generation of vibration noise or abnormal noise.

  The invention according to claim 4 is characterized in that a rolling element having a ground contact surface at a position below the lowermost end of the movable plate is provided at the lower end of the movable plate.

  The rolling element here is assumed to be a rotatable roller that can follow the approaching and separating operation of the fixed plate and the movable plate in the longitudinal direction of the car, more preferably the movable plate abuts the pit floor surface. In order to alleviate the impact, a rubber roller whose surface is covered with an elastic body such as rubber is used.

  In the first to third aspects of the invention described above, when the pit depth is set shallow with respect to the maximum height dimension of the guard plate, and the car is lowered to the lowest position, it is movable. The lower end of the plate comes into contact with the pit floor. Then, as the movable plate receives the pushing-up force from the pit floor surface and moves upward relatively, the slide guide portion or the guide slot portion is slanted, so that the movable plate remains in contact with the pit floor surface at the same time. There is a possibility that the pit floor may be damaged by a so-called drag phenomenon that moves in the horizontal direction from the front side of the car toward the back side.

  The invention according to claim 4 solves this problem, and when the lower end of the movable plate comes into contact with the pit floor surface, the two move relative to each other in the longitudinal direction of the car as the movable plate moves upward relative to the fixed plate. Smoothly allows the guard plate to be damaged, and the pit floor is not damaged.

  According to the first to third aspects of the invention, as long as the elevator plate is in normal operation, that is, as long as the guard plate maintains the maximum height, the movable plate is placed in a so-called wedge-shaped space on the fixed plate side. Because the mutual pressure force between the fixed plate and the movable plate in the front-rear direction is acting, the movable plate will not oscillate or vibrate, preventing the generation of vibration noise or abnormal noise. can do.

  According to the invention of claim 4, by providing a rolling element at the lower end of the movable plate, it is possible to prevent damage to the guard plate or damage to the pit floor when the guard plate contacts the pit floor. It can be prevented in advance.

  FIG. 1 and the subsequent drawings show a preferred embodiment of the guard device according to the present invention. In particular, FIG. 1 shows the entire elevator car including the guard device as a perspective view. 2A is a front perspective view of the guard plate 2 that is the main element of the guard device in a fully extended state, and FIG. 2B is a rear perspective view of the guard plate 2. 3 is a side view of FIG. 2A and FIG. 4 is an exploded view of the guard plate 2.

  As shown in FIG. 1, a guard plate 2 called a toe guard is installed on the lower surface of the front side of the elevator car 1 (directly below the part that becomes the sill of the car door 3) and protrudes downward in a vertical posture. Yes. When the car 1 stops at a predetermined stop floor, both sides of the guard plate 2 are opened when the landing door 6 is opened with the car floor 4 being higher than the landing floor 5 due to a stop position error. This is to prevent a gap from being generated at the level difference between the floors 4 and 5 of the floor.

  As shown in FIGS. 2 and 3, the guard plate 2 guides the fixed plate 2a suspended from the front lower surface of the car 1 and the fixed plate 2a so as to be movable up and down so as to overlap the fixed plate 2a. The movable plate 2b is supported, and the guard plate 2 as a whole can be reduced in height, that is, can be expanded and contracted in the vertical direction.

  Two brackets 11 extending obliquely upward are attached to the fixing plate 2a, and three attachment holes 13 are formed at the upper end. The attachment holes 14 are formed at the upper end of the bracket 11. And three mounting holes 13 are fixed to the lower surface of the front side of the car 1 by screwing.

  Then, both sides of the fixed plate 2a are bent at substantially right angles as side flange portions 15, and guide slot portions 16 serving as slide guide portions are formed on the side flange portions 15 from the back side of the car 1 toward the front side. It is formed obliquely so as to have a downward slope. As will be described later, both ends of the movable plate 2b in the width direction are engaged with the guide slot portion 16 so that the movable plate 2b can move up and down along the guide slot portion 16 with respect to the fixed plate 2a. 1 is supported so as to be able to approach and separate in the front-rear direction.

  Further, the left and right auxiliary flange portions 17 are formed by further bending the lower half of the side flange portion 15 formed on both sides of the fixed plate 2a substantially at a right angle, and the left and right auxiliary flange portions 17 are connected to each other in an angled shape. A reinforcing bar 18 and a bolt / nut 19 are connected to each other. This secures the rigidity of the fixed plate 2a.

  A flange-like lower stopper 21 is bent and formed at the lower end portion of the fixed plate 2a, and an upper stopper 34 is similarly bent and formed at the upper end portion of the movable plate 2b, as shown in FIG. The lowermost position of the movable plate 2b with respect to the fixed plate 2a is regulated by abutting the plates 34 and 21 against the counterpart plate.

  Further, as shown in FIG. 4, a flat plate-shaped guide plate 30 is fixed to the movable plate 2b by four sets of bolts and nuts 31 along the longitudinal direction (width direction). The guide plate 30 is set longer than the width of the movable plate 2b by a predetermined amount, and has the same gradient as the guide slot portion 16 on the fixed plate 2a side. The slide portion 32 is engaged with the guide slot portion 16. As a result, the movable plate 2b is guided and supported with respect to the fixed plate 2a so as to be able to move up and down along the guide slot portion 16 and to approach and separate in the front-rear direction of the car 1.

  The thickness of the guide plate 30 is smaller than the slot width of the side slot portion 16 so that the guide plate 30 can move up and down smoothly along the side slot portion 16.

  As shown in FIG. 3, even if the movable plate can be moved up and down with respect to the fixed plate 2a by the engagement of the guide slot portion 16 and the slide portion 32, the upper and lower stoppers 34 and 21 are respectively opposed to each other. The lowermost position of the movable plate 2b is regulated by contacting the fixed plate 2a or the movable plate 2b. Note that the upper stopper 34 is formed only at both ends in the longitudinal direction at the upper end of the movable plate 2b, and a clearance D as a gap is ensured otherwise.

  As shown in FIG. 5 in addition to FIG. 2, the right and left slide parts 32 are also provided with an angled extension arm 43 in a vertical posture via an angled bracket 41 and two sets of bolts and nuts 40 and 42. Are connected. A rubber roller 44 as a rolling element is rotatably attached to the lower end of each extension arm 43 by bolts and nuts 45. The rubber roller 44 assists the mutual movement of the fixed plate 2a and the movable plate 2b in the front-rear direction of the car 1 when the rubber roller 44 abuts against the pit floor as will be described later. The grounding surface which is the outer peripheral surface of the cylinder of the rubber roller 44 is set to be positioned below the lowermost end of the movable plate 2b itself, and the rotation center of the rubber roller 44 is set to be directed in the width direction of the car 1. It is.

  Therefore, according to the guard device configured as described above, when the guard plate 2 is in the maximum extended state (the state having the maximum height) as shown in FIG. The lower stopper 21 formed at the lower end of the fixed plate 2a is fixed to the movable plate 2b and the upper stopper 34 formed at the upper end of the movable plate 2b is fixed. By contacting each plate 2a, the movable plate 2b is stationary while the fixed plate 2a and the movable plate 2b partially overlap each other. That is, the movable plate 2b is held at its lowest lowered position with respect to the fixed plate.

  Even in this state, the slide portion 32 engaged with the guide slot portion 16 is not in contact with the lowermost end of the guide slot portion 16, and the movable plate is still at the lower end portion of the guide slot portion 16. A minute stroke is left so that 2b can descend.

In this state, since the movable plate 2b is guided and supported by the oblique guide slot portion 16 on the fixed plate side, a pressure contact force that always tries to come into close contact with the fixed plate 2a with its own weight acts on the movable plate 2b. The movable plate 2b is substantially sandwiched in a so-called wedge-shaped space between the vertical wall surface of the fixed plate 2a and the oblique guide slot portion 16 by its own weight, and the movable plate 2b is pressed against the guide slot portion 16 At the same time, it is also pressed against the fixed plate 2a.
Therefore, even if the car 1 is moved up and down, the movable plate 2b does not swing or vibrate accordingly, and the generation of vibration noise and abnormal noise caused by the guard plate 2 can be prevented.

  In particular, in a state where the upper stopper 34 is in pressure contact with the fixed plate 2a and the lower stopper 21 is in pressure contact with the movable plate 2b, the upper and lower stoppers 34 and 21 themselves and a part of the counterpart plate (fixed plate 2a or movable plate 2b) By slightly bending due to the self-elastic force, the movable plate 2b is further lowered by its own weight to promote the drop of the movable plate 2b with respect to the so-called wedge-shaped space. A force that further promotes the depression in the wedge-shaped space is always acting. As a result, the pressure contact force or adhesion force between the fixed plate 2a and the movable plate 2b is further increased, and the effect of preventing the vibration of the movable plate 2b and the effect of preventing the vibration between the fixed plate 2a and the movable plate 2b and the generation of abnormal noise. This is even more advantageous.

  In the above structure, even when only one of the lower stopper 21 and the upper stopper 34 is in contact with the counterpart plate, the function of regulating the lowest position of the movable plate 2b and the swinging of the movable plate 2b are controlled. Although it has a function of preventing, by providing the stoppers 21 and 34 at two places above and below the guide plate 30 guided and supported by the side slot portion 16, the effect of preventing the movable plate 2b from swinging becomes more remarkable. .

  On the other hand, when the pit depth is set shallower than the maximum height dimension of the guard plate 2 and the car 1 is lowered to the lowest lowered position, as shown in FIG. The rubber roller 44 at the lower end of the movable plate 2b comes into contact with the pit floor surface 60, and as shown in FIG. 5B, the movable plate 2b is pushed up relative to the fixed plate 2a so that the entire guard plate 2 is in a contracted state. Become. At this time, the movable plate 2b moves up along the guide slot portion 16 and simultaneously moves horizontally in the direction in which the upper and lower stoppers 34 and 21 are separated from the mating plate, that is, the side of the cage 1 by the rolling of the rubber roller 44. It will be. As a result, the guard plate 2 smoothly enters the contracted state as shown in FIG. 6B, and damage to the guard plate 2 due to contact with the pit floor surface 60 is prevented.

  In addition, since only the rubber roller 44 comes into direct contact when the guard plate 2 comes into contact with the pit floor surface 60, the impact at the initial contact is absorbed and alleviated by the rubber roller 44. Further, since the horizontal movement operation of the movable plate 2b accompanying the ascent of the movable plate 2b, that is, the approaching / separating operation of the fixed plate 2a and the movable plate 2b is performed with the rolling of the rubber roller 44, there is no rubber roller 44, for example. As in the case where a part of 2b directly contacts the pit floor surface 60, the pit floor surface 60 is not damaged by a so-called drag phenomenon in the horizontal direction accompanying the ascending operation of the movable plate 2b.

  As described above, according to the present embodiment, it is possible to prevent vibrations and abnormal noises from occurring due to the raising and lowering operation of the car 1 due to the guard plate 2 having a telescopic structure, Even if the guard plate 2 comes into contact with the pit floor surface 60, damage to the guard plate 2 itself or damage to the pit floor surface 60 can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an overall configuration of an elevator car provided with a guard device called a toe guard as a preferred embodiment of the present invention. (A) is a front side perspective view of the guard plate which is the main element of a guard apparatus, (B) is a back side perspective view of the guard plate. FIG. 3 is an enlarged side view of the guard plate shown in FIG. 2. It is a disassembled perspective view of the guard plate shown in FIG. It is the C section enlarged view in (B) of FIG. It is operation | movement explanatory drawing when a guard plate contact | abuts to the pit floor surface, (A) is side explanatory drawing of the contact | abutting initial stage, (B) is side explanatory drawing in the contracted state of the guard plate.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Car 2 ... Guard plate 2a ... Fixed plate 2b ... Movable plate 15 ... Side flange part 16 ... Side slot part (slide guide part)
21 ... Lower stopper 30 ... Guide plate 32 ... Slide part 34 ... Upper stopper 44 ... Rubber roller (rolling element)

Claims (4)

A guard plate that protrudes downward is provided on the lower surface of the front side of the elevator car. The guard plate is supported by a fixed plate that is suspended from the lower surface of the front side of the car, and is supported by the fixed plate so as to be movable up and down. In the elevator guard device having a structure in which the overall height of the guard plate can be reduced by being formed with the movable plate,
On both sides of either the fixed plate or the movable plate, there is provided an oblique slide guide portion that is inclined downward from the rear side of the car to the front side in a side view, and this slide guide portion The movable plate is guided and supported so that it can be raised and lowered while moving in the longitudinal direction of the car with respect to the fixed plate along the
In the lowest lowered state of the movable plate with respect to the fixed plate, the lowermost position is regulated by the movable plate being pressed against the slide guide and pressed against the fixed plate while a part of both of them is overlapped with each other An elevator guard device characterized in that Side flanges are bent on both sides of the fixed plate,
In this side flange portion, an oblique guide slot portion that is inclined downward from the back side of the car in front view to the front side is formed as a slide guide portion,
The elevator guard device according to claim 1, wherein the movable plate is guided and supported along the guide slot portion so as to be movable up and down.   The upper end of the movable plate and the lower end of the fixed plate are bent toward the mating plate to make a stopper, and the upper and lower stoppers abut against the mating plate so that the lowest position of the movable plate relative to the fixed plate is regulated. The elevator guard apparatus according to claim 1 or 2, wherein the elevator guard apparatus is provided. The elevator guard device according to any one of claims 1 to 3, wherein a rolling element is provided at a lower end portion of the movable plate with a grounding surface at a position below the lowermost end of the movable plate.

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