JP6542309B2 - Balance weight of elevator - Google Patents

Description

  The present disclosure relates to elevator counterweights.

  The elevator carries the passenger from the landing on the car, raises and lowers the inside of the hoistway according to the customer's request, and lands on the customer's desired landing to drop the passenger. is there. In the elevator, for example, a hoisting machine provided in a machine room in the upper part of a hoistway of a building lifts or unrolls a lifting rope to raise or lower a car connected to one end of the lifting rope. At the other end of the elevating rope, a counterweight having a counterweight corresponding to the mass of the car is connected, thereby lightening the load on the hoisting machine and balancing at the time of elevating the car To be done.

  Since the balance mass corresponding to the mass of the car is different depending on the specification of the elevator, the balance weight is a flat plate called an adjustable weight plate with a weight of about 20 to 30 kg on the balance weight frame. It is configured by stacking the plates in the number corresponding to the balance mass. The balance mass is constant unless the number of additional weight plates is increased or decreased.

  Patent Document 1 describes an elevator apparatus that automatically adjusts the balance mass continuously in order to cope with the fluctuation of the mass of the car due to the fluctuation of the customer. Here, a counterweight is used which has a tank for containing a liquid for adjusting the mass, a piston for adjusting the amount of liquid in the tank, and a first joining means in communication with the tank. Further, a storage pipe provided along the height direction of the hoistway and storing a liquid for mass adjustment, and a position opposite to the first bonding means at the position of the balance weight when the car is positioned at the stop floor A second joining means is provided and is in communication with the storage pipe. By this, when the car is located on the stop floor, the mass difference between the car and the counterweight is detected, and the first joining means and the second joining means are connected, and the amount of liquid corresponding to the mass difference It is stated that the amount of displacement of the piston is controlled to obtain.

JP, 2014-122102, A

  After an elevator has been installed in a building, partial renewal of the elevator may be performed, or full renewal may be performed along with total replacement of a new type of car. In this case, since the mass of the car changes, in order to increase or decrease the balance mass of the balance weight, removal or addition of the additional weight plate is performed. If the work to increase or decrease the weight board is carried out with the car and the counterweight frame connected, adjust the height of the car and the height inside the hoistway of the counterweight frame, and the ceiling side of the car A maintenance worker gets in at the top of the building. Since one weight of the weight board is approximately 20 to 30 kg, the work of increasing and decreasing the number of weight boards becomes a power work at a high place, and it is necessary to pay close attention, and maintenance workers The burden is heavy.

  Then, the balance weight of the elevator which can reduce the burden of a maintenance worker in the increase and decrease work of the balance mass in a balance weight is desired.

The counterweight of the elevator according to the present disclosure is arranged on a hoistway provided penetrating from the upper side to the lower side of the building, and is arranged on two vertical frames parallel to the raising and lowering direction, the upper side of the two vertical frames A balance weight frame formed by combining an upper frame connecting the end portions and a lower frame connecting the lower side ends of two vertical frames, and a predetermined number of adjustable weights stacked and held on the balance weight frame A weight plate portion composed of a plate, and a steel ball tank portion containing a predetermined number of steel balls therein, the two vertical holding ends held by the two vertical frames of the counterweight frame And having a steel ball tank portion stacked on the upper side of the weight plate portion, and the shape of the steel ball tank portion is a parallelogram having each vertical holding end portion on the oblique side, each vertical holding The dimensions along the width direction including the end portions of the counterweight frame face each other Than the distance between the dimensions of the vertical frame of, respectively, it is set to be slightly smaller.

  According to the above configuration, by setting the mass of one steel ball to a suitably small mass, the load is much reduced compared to increasing or decreasing an adjustable weight plate having a mass of about 20 to 30 kg per sheet. The balance mass can be increased or decreased.

  In the counterweight of the elevator according to the present disclosure, the steel ball tank portion is housed in a tank case having a steel ball housing space therein, and a predetermined one which is housed in the tank case and forms a mass corresponding to a predetermined balanced mass. Preferably, the tank case includes a steel ball supply port provided on the upper surface and a steel ball discharge part provided on the front side surface.

  According to the above configuration, the maintenance worker can supply the steel balls from the upper side of the tank case when increasing the balance mass, and discharge the steel balls from the front side of the tank case when reducing the balance mass. it can. For example, by arranging the tank case so that the steel ball discharge portion is on the side of the car, it is possible to easily increase or decrease the balance mass in the work from the upper part on the ceiling side of the car.

  In the counterweight of the elevator according to the present disclosure, the tank case is configured such that the steel ball flows from the upper steel ball supply port side to the lower steel ball discharge portion in a folded step-like manner in the internal space accommodating the plurality of steel balls. It is preferred to include a plurality of steel ball arrangement plates arranged in.

  According to the above configuration, since the steel ball arranging plate is provided in the tank case, it is possible to suppress the steel ball from jumping and the balance weight vibrating when the balance weight moves up and down.

  In the counterweight of the elevator according to the present disclosure, the steel ball discharge portion preferably has a steel ball discharge port in which at least two outlet door plates are overlapped to cover the opening.

  According to the above configuration, since the steel ball discharge port is double-blocked by the two outlet door plates, it is possible to sufficiently prevent the steel balls from being unexpectedly discharged.

  In the counterweight of the elevator according to the present disclosure, it is preferable that the tank case has a steel ball amount visualizing window provided on the front side and capable of visually recognizing the uppermost surface position of the plurality of steel balls housed in the tank case. .

  According to the above configuration, when the tank case is made of metal, even if the inside of the tank case can not be viewed directly, the total amount of steel balls in the tank can be easily confirmed from the steel ball amount viewing window. The balance mass can be easily confirmed.

  According to the counterweight of the elevator configured as described above, it is possible to reduce the burden on the maintenance worker in increasing and decreasing the balance mass.

It is a figure which shows the state in which adjustment operation of the balance mass of the balance weight of the elevator which concerns on embodiment is performed. It is a block diagram of the balance weight of the elevator which concerns on embodiment. In FIG. 2, it is a figure which shows the method of installing a tank case in a balance weight frame. It is detail drawing of the tank case of FIG. It is a block diagram of the counterweight of the elevator in another embodiment.

  Hereinafter, an embodiment according to the present disclosure will be described in detail using the drawings. In the following, the maintenance worker moves up and down the balance mass for the balance weight on the upper side of the ceiling of the elevator, but depending on the specification of the elevator, etc., it is performed in the pit at the bottom of the hoistway May be In the hoistway, the counterweight is placed on the back side opposite to the entry / exit side of the car, but depending on the specifications of the elevator, it may be fishing on the side of the entrance / exit of the car. A combined weight may be placed. The shape described below, the number of adjustable weight plates, the value of the balance mass, and the like are examples for explanation, and can be appropriately changed according to the specifications of the elevator. Below, the same numerals are given to the same element in all the drawings, and the overlapping explanation is omitted.

  FIG. 1 is a view showing a state in which the adjustment work of the balance mass of the counterweight 30 of the elevator is being performed in the elevator 10. Hereinafter, the counterweight 30 of the elevator will be called the counterweight 30 unless otherwise specified. The elevator 10 ascends and descends in the hoistway 12 which vertically penetrates the building, places the passenger from the landing 13 on the carriage 14 and lands on the desired landing 13 of the passenger and uses the passenger It is a customer transport device. FIG. 1 shows the vertical direction, the depth direction, and the width direction orthogonal to each other. The vertical direction is the direction in which the hoistway 12 extends, and is the elevating direction of the car 14. The direction toward the upper floors of the building is the upper side, and the direction toward the lower floors is the lower side. The depth direction is a direction parallel to the direction from the landing 13 toward the hoistway 12, and the direction in which the counterweight 30 is disposed is indicated as the counterweight side. The direction of the counterweight side is the opposite direction to the landing side. The width direction is a direction corresponding to the width direction of the entrance at the landing 13. When looking at the car 14 side from the landing 13, the left side is the left side and the right side is the right side. The same applies to the following figures.

  The elevator 10 raises or lowers the elevator car 16 connected to one end of the elevator rope 16 by raising or lowering the elevator rope 16 by a hoisting machine provided in a machine room (not shown) above the hoistway 12 of the building. . The counterweight 30 is connected to the other end of the elevating rope 16 and has a counterweight corresponding to the mass of the car 14, thereby reducing the load on the hoisting machine and raising and lowering the car 14. Balance. In the hoistway, when the car 14 ascends, the counterweight 30 descends, and when the car 14 descends, the counterweight 30 ascends. The weight guide rails 20 and 22 are guide rails when the counterweight 30 moves up and down in the hoistway 12. Guide members 24, 25, 26, 27 (guide member 27 is shown in FIG. 2) are provided on the counterweight 30, and when the counterweight 30 moves along the weight guide rails 20, 22, the weight guide rails 20. , 22 is a guide member for preventing it from coming off. In each of the guide members 24, 25, 26, 27, a guide roller or the like that contacts the weight guide rails 20, 22 is disposed inside. A car guide rail which is a guide rail for moving up and down the hoistway 12 is also provided for the car 14, but is not shown in FIG. 1.

  The balance mass of the counterweight 30 has two parts of a weight plate portion 40 and a steel ball tank portion 50. The weight plate portion 40 is obtained by stacking a plurality of additional weight plates 42 in a predetermined number. The adjustable weight plate 42 is used in the prior art, and one is a cast plate having a weight of about 20 to 30 kg. In the counterweight 30, the number of the adjustable weight plates 42 of the weight plate portion 40 is a fixed number, and the number of the adjustable weight plates 42 is not increased or decreased in the case of adjustment of the balance mass. In the example of FIG. 1, the number of adjustable weight plates 42 is 30, and the weight of the weight plate portion 40 is about 600 to 900 kg.

  The steel ball tank portion 50 is a tank container capable of accommodating the steel ball 80 therein, and when the balance weight needs to be adjusted in the counterweight 30, the steel ball tank portion 50 is used. Adjust the mass. The steel ball 80 is used because the mass per steel ball 80 is much smaller than the mass of one of the adjustable weight plates 42, so the burden of increasing and decreasing the balance mass is significantly reduced. It is. As the steel ball 80, a steel ball equivalent to a steel ball used in a game machine generally called "pachinko" can be used. The steel ball used in the game machine has a diameter of 11 mm and a weight of 5.4 to 5.7 g according to the standard. When the steel ball 80 of this specification is used, about 17,500 to 18,500 steel balls 80 may be prepared to adjust the balance mass to about 100 kg.

  The steel ball tank portion 50 is provided as the balance mass in addition to the weight plate portion 40, in the case where the elevator 10 is partially renewed after the elevator 10 is installed in the building, adjustment of the balance mass is This is because the mass is often increased. In the case of increasing the balance mass, the portion of the balance mass by the conventional weight plate 42 is left as the weight plate portion 40, the intermediate plate 44 is disposed on the weight plate portion 40, and steel is placed on the upper side The ball tank unit 50 is additionally arranged. In this way, if the weight of the steel ball 80 to be supplied to the steel ball tank portion 50 is set as the mass of the balance mass to be increased, adjustment of the balance mass accompanying partial renewal is lighter for the maintenance worker 8 It will be possible to do with the burden. Examples of such partial renewal include the installation of a scratch prevention plate inside the car 14, the addition of handrails, the construction of a wheelchair control panel, and the introduction of barrier-free equipment. This is an example for explanation, and the contents differ depending on the renewal specification of the elevator 10.

  In FIG. 1, a maintenance worker 8 is shown that has climbed to a work space 15 provided on the ceiling side of the car 14 of the elevator 10 for the purpose of adjusting the balance mass in the counterweight 30. The maintenance worker 8 sets the operation mode to the maintenance work mode to the control device disposed in the machine room of the elevator 10 using the maintenance work terminal (not shown). In the maintenance operation mode, the maintenance worker 8 can move the car 14 using the terminal for maintenance work, so the ceiling of the car 14 and the counterweight 30 are aligned at substantially the same height in the hoistway 12 As described above, the stop position of the car 14 is set. Then, the maintenance worker 8 inserts a plurality of steel balls 80 into the supply bucket 6 from the steel ball box 4 carried into the work space 15. Then, hold the supply bucket 6 and remove the lid portion 62 of the steel ball supply port 60 of the steel ball tank unit 50, and from the supply bucket 6 the steel ball 80 through the steel ball supply port 60 Supply to the interior space of Details of the steel ball supply port 60, the lid 62 and the like will be described later.

  FIG. 2 is a block diagram of the counterweight 30. As shown in FIG. Fig.2 (a) is the front view which looked at the balance weight 30 in FIG. 1 from the landing side, (b) is the side view which looked at (a) from the right side. The counterweight 30 includes a counterweight frame 32 for holding the weight plate portion 40 and the steel ball tank portion 50.

  The counterweight frame 32 is a frame formed by combining two vertical frames 34 and 35, an upper frame 36, and a lower frame 38. In a state where the counterweight 30 is disposed in the hoistway 12 of the building, the two vertical frames 34 and 35 are members extending in parallel in the vertical direction which is the elevating direction. The upper frame 36 is a member connecting the upper side end portions of the two vertical frames 34 and 35, and the lower frame 38 is a member connecting the lower side ends of the two vertical frames 34 and 35. The guide members 24, 25, 26, 27 used when the counterweight 30 moves along the weight guide rails 20, 22 are fixedly attached to the left and right ends of the upper frame 36 and the lower frame 38, respectively. .

  Each of the two vertical frames 34 and 35, the upper frame 36, and the lower frame 38 is formed by molding a metal material having sufficient strength into a predetermined shape. For example, the vertical frames 34 and 35 have a predetermined length of a pillar material having a U-shaped cross section, serving also as the guide groove 33 when stacking the adjustable weight plate 42 or holding the steel ball tank portion 50. And used (see FIG. 3 (b)).

  As the counterweight frame 32, one in which these are firmly connected by welding or fastening of a bolt and a nut or the like is used. Sufficient strength and firm coupling means that the balance mass of weight plate portion 40 and steel ball tank portion 50 held by balance weight frame 32 is sufficiently endured, and balance weight 30 is operated by operation of elevator 10. It means to endure the external force by the acceleration and impact received.

  The adjustable weight plate 42 constituting the weight plate portion 40 is a flat mass having a predetermined planar shape and a predetermined thickness. The predetermined planar shape is substantially rectangular. The substantially rectangular shape is based on a rectangle formed by long sides and short sides, and is a shape having projecting portions at both ends in the direction in which the long sides extend. The overhanging portions at both ends are portions fitted into the guide grooves 33 of the vertical frames 34 and 35 so as to be an aligned stack when the adjustable weight plates 42 are stacked and arranged on the counterweight frame 32. .

  The steel ball tank portion 50 is disposed above the weight plate portion 40 in the counterweight frame 32. The middle plate 44 is a fixing plate which is disposed on the uppermost surface of the thirty additional weight plates 42 stacked and firmly fixed to the counterweight frame 32 in a state where the plural weight plates 42 are stacked. Fixing between the intermediate plate 44 and the counterweight frame 32 is performed by means of fixing means such as bolts not shown. The steel ball tank unit 50 is held by the counterweight frame 32 so as to place the bottom surface on the upper surface of the intermediate plate 44.

  The tank case 52 is a container unit that internally accommodates the steel balls 80 whose number corresponds to the balance mass in the steel ball tank unit 50. The tank case 52 is made of a material that withstands the entire mass of the steel ball 80 housed inside, and is formed into a predetermined shape. As a material, a metal material is used, and for example, one formed into a predetermined container shape using a steel material is used.

  The vertical holding end portions 54 and 56 at both left and right ends of the tank case 52 are projecting portions shaped to be fitted into the guide grooves 33 of the vertical frames 34 and 35. If a partial renewal of the elevator 10 is performed after the elevator 10 is installed in the building, the counterweight frame 32 has been installed. In order to fit the vertical holding end portions 54 and 56 into the guide grooves 33 of the vertical frames 34 and 35 of the existing counterweight frame 32, the shape of the tank case 52 is not rectangular but the vertical holding end portions 54 and 56. It is good to make it a parallelogram having an oblique side.

  FIG. 3 shows a method of fitting and fixing a parallelogram-shaped tank case 52 having vertical holding ends 54 and 56 on the oblique side in the guide grooves 33 of the vertical frames 34 and 35. 3 (a) is a front view showing the upper side of the intermediate plate 44 in the counterweight frame 32, and FIG. 3 (b) is a top view of FIG. 3 (a) as viewed from the upper side. The part which protrudes upwards from the upper surface side of the tank case 52 in FIGS. 3A and 3B is a steel ball supply port 60.

  The thickness A of the tank case 52 is set to be substantially the same as the thickness B of the vertical frames 34, 35. The thicknesses A and B are dimensions along the depth direction of the elevator 10 in a state where the tank case 52 is held by the vertical frames 34 and 35. The shape of the parallelogram of the tank case 52 is the shape in the front view of the counterweight frame 32 in a state where the tank case 52 is held by the vertical frames 34 and 35. In order to fit the vertical holding ends 54, 56 at the left and right ends of the tank case 52 into the guide grooves 33 of the vertical frames 34, 35, as shown in FIG. 3A, the vertical holding ends 54, 56 are stretched. The direction is parallel to the extending direction of the vertical frames 34, 35. In this state, the dimension C along the width direction including the vertical holding end portions 54 and 56 of the tank case 52 is slightly smaller than the distance dimension D between the vertical frame 34 and the vertical frame 35 facing each other. Set the 52 shape. By this setting, the tank case 52 can be diagonally arranged in the upper space of the intermediate plate 44 of the existing balance weight frame 32. In this state, as shown in FIG. 3B, the vertical holding end portions 54 and 56 have a positional relationship in which the guide groove 33 of the vertical frame 34 and the guide groove 33 of the vertical frame 35 face each other.

  From the state of FIG. 3A, the position of the end E of the right side of the vertical holding end 56 on the bottom surface of the tank case 52 is on the upper surface of the intermediate plate 44 until E ′ abuts against the guide groove 33 of the vertical frame 35. Slide it to the right as indicated by the arrow. At the same time, the tank case 52 is rotated in the direction indicated by the arrow until the position of the left end F of the bottom surface of the tank case 52 abuts against the intermediate plate 44 F ′. At this time, the position of the end G on the left side of the vertical holding end 54 on the upper surface of the tank case 52 rotates to G ′ which abuts on the guide groove 33 of the vertical frame 34. Thus, the tank case 52 obliquely disposed within the range D of the distance between the vertical frame 34 and the vertical frame 35 facing each other is guided by the vertical frame 35 at the right end E ′ of the vertical holding end 56 at the bottom surface. The left end G ′ of the vertical holding end 54 on the upper surface is fitted into the guide groove 33 of the vertical frame 34. In the tank case 52, the right end E 'of the vertical holding end 56 and the left end G' of the vertical holding end 54 are fitted in the guide grooves 33 of the vertical frames 35, 34, respectively. Therefore, the end E 'and the vertical frame 35, and the end G' and the vertical frame 34 are fixed by a suitable fixing member such as a bolt.

  FIG. 4 is a view showing a state in which the end E 'and the vertical frame 35, and the end G' and the vertical frame 34 are fixed on the upper surface of the intermediate plate 44 of the tank case 52. As shown in FIG. The holding plate 46 is a member having substantially the same outer shape as the intermediate plate 44 and has a through hole through which the steel ball supply port 60 passes. With the tank case 52 fixed to the vertical frames 34, 35, the presser plate 46 passes the steel ball supply port 60 through the through hole to press the upper surface of the tank case 52, and the vertical frames 34, 35 It is fixed by the following fixing means. Thus, the tank case 52 is firmly fixed to and held by the counterweight frame 32 in a state where the steel ball supply port 60 protrudes from the upper surface of the pressing plate 46.

  In the above, the outer shape of the tank case 52 of the steel ball tank portion 50 is a parallelogram having an oblique side, and the vertical holding end portions 54 and 56 are fitted into the guide grooves 33 of the vertical frames 34 and 35 of the counterweight frame 32. It shall be fixed. Instead of this, the outer shape of the tank case 52 may be a simple rectangle, and the dimension in the width direction may be smaller than the facing dimension D of the vertical frames 34 and 35 facing each other. In this case, in order to fix the smaller tank case to the counterweight frame 32, between the bottom of the smaller tank case and the middle plate 54, and between the upper surface of the smaller tank case and the holding plate 46, It is preferable to fix each with appropriate fixing means such as a bolt.

  The detailed configuration of the steel ball tank unit 50 will be described with reference to FIG. The steel ball tank portion 50 includes a tank case 52 and a predetermined number of steel balls 80 accommodated in the internal space 53 thereof. The predetermined number of steel balls 80 corresponds to the number obtained by dividing the mass corresponding to the balanced mass in the steel ball tank portion 50 by the mass of one steel ball 80.

  The steel ball supply port 60 is a cylindrical portion provided so as to protrude upward from the upper surface of the tank case 52 and having a supply hole communicating with the internal space 53. The inner diameter of the supply hole is set to several times the outer diameter of the steel ball 80. The lid portion 62 is a lid member for closing the steel ball supply port 60 which protrudes from the upper surface of the pressing plate 46 in a state where the tank case 52 is fixed and held by the counterweight frame 32. A female thread is cut on the inner surface of the lid 62, and a thread is cut on the outer periphery of the cylindrical portion of the steel ball supply port 60 correspondingly. The steel ball supply port 60 is firmly fixed to the tank case 52 by fitting the female screw portion of the lid portion 62 to the male screw portion of the steel ball supply port 60 and tightening it. As shown in FIG. 1, it is preferable to connect the lid 62 with the pressing plate 46 by an appropriate chain or the like so that the lid 62 is not lost.

  The steel ball discharge portion 63 is provided on the front side surface of the tank case 52 and is a discharge mechanism used when the steel ball 80 is discharged from the internal space 53 of the tank case 52. The front side surface of the tank case 52 is the surface of the tank case 52 facing the car 14 when the counterweight 30 is disposed in the hoistway 12, and in FIG. It is a face.

  The steel ball discharge portion 63 has a steel ball discharge port 64 which is an opening provided on the front side surface of the tank case 52, and two outlet door plates 66, 68 for closing the steel ball discharge port 64. The two outlet door plates 66, 68 are slidably disposed on the front side of the tank case 52 along suitable slide grooves and are superimposed on each other at the position of the steel ball outlet 64. FIG. 4 shows a state in which the steel ball outlet 64 is closed in a state in which the two outlet door plates 66 and 68 are stacked. The fixing bolt 70 is a fixing means for fixing the steel ball outlet 64 to the tank case 52 in a state of closing the steel ball outlet 64 twice for the two outlet door plates 66 and 68. The steel ball outlet 64 is closed by two outlet door plates 66 and 68 and fixed to the tank case 52 so that the balance weight 30 receives the vibration and impact when it moves up and down in the hoistway 12. Leakage of the steel ball 80 from the ball outlet 64 can be reliably prevented. The number of exit door plates may be at least two, for example, three.

  The steel ball amount visual recognition windows 72 and 74 are provided on the front side surface of the tank case 52 and are vertically extending visible holes. When the tank case 52 is made of metal, the state of the internal space 53 can not be viewed directly. Therefore, the maintenance worker 8 places the uppermost surface position of the plurality of steel balls 80 accommodated in the internal space 53 of the tank case 52. In order to visually recognize, a steel ball amount visual recognition window 72, 74 is provided. From the uppermost surface position of the plurality of steel balls 80, the total number of the plurality of steel balls 80 accommodated in the tank case 52 can be estimated, and the balanced mass in the steel ball tank portion 50 can be estimated. It is preferable to provide a scale in which the topmost surface position of the steel ball 80 is converted to the accommodation mass along the steel ball amount visual recognition windows 72 and 74. The steel ball amount visualizing windows 72 and 74 may be through holes having a width smaller than the diameter of the steel ball 80. Alternatively, a plate of transparent material of appropriate strength may be fitted into the through slot. In this case, the width of the steel ball amount visualizing windows 72 and 74 can be made larger than the diameter of the steel ball 80, which facilitates visual recognition. It is necessary to fix to the tank case 52 with a suitable fixing member so that the plate of the transparent material does not come out of the through hole. Although two steel ball quantity visual recognition windows 72 and 74 are shown in FIG. 4, two are an illustration for explanation, and may be one or three in some cases.

  In FIG. 4, the tank case 52 is partially broken to show the internal space 53. In the internal space 53 of the tank case 52, the plurality of steel ball disposition plates 76 disposed in the internal space 53 is from the steel ball supply port 60 on the upper side to the steel ball discharge port 64 of the steel ball discharge portion 63 on the lower side. The steel ball 80 is disposed to be inclined so as to flow in a folded step-like manner according to gravity. By providing the plurality of steel ball arranging plates 76, the plurality of steel balls 80 are appropriately partitioned in the vertical direction, so when the counterweight 30 is raised and lowered in the hoistway 12, the steel case is disposed in the tank case 52. It is possible to suppress that the ball 80 bounces and the balance weight 30 vibrates.

  As described above, the adjustable weight plate 42 and the steel ball tank portion 50 are attached to the counterweight frame 32 by the intermediate plate 44, the holding plate 46, the guide grooves 33 of the vertical frames 34 and 35, and a plurality of fixing members such as bolts. It is fixed. If necessary, the additional weight plate 42 and the steel ball tank portion 50 can be further fixed to the counterweight frame 32 by using a suitable reinforcing plate.

  In the above, it has been described that the steel ball tank portion 50 is disposed in the existing counterweight frame 32 when the elevator 10 is partially renewed after the elevator 10 is installed in the building. In addition, after the elevator 10 is installed in a building, the elevator 10 may be fully renewed due to, for example, total replacement of a new type of car, or the elevator may be newly installed in the building. In such a case, the balance mass of the elevator counterweight 90 can be the mass of only the steel ball tank portion. Hereinafter, the counterweight 90 of the elevator will be referred to as the counterweight 90 unless otherwise specified.

The counterweight 90 shown in FIG. 5 is an example in which the balance mass necessary for the elevator 10 is covered only by the mass of the large steel ball tank 92 without using the weight plate 40 described in FIG. 1 at all. . The steel ball tank portion 92 includes a tank case 94 and guide members 24, 25, 26, 27. The tank case 94 is a large-sized steel ball container that is integrally molded using a material having sufficient strength to the balance mass required for the elevator 10. Although not shown in the tank case 94, the steel ball supply port 60, the cover 62, the steel ball discharge part 63, the steel ball amount visualizing windows 72 and 74 described in FIG. A plurality of steel ball arrangement plates 76 are provided. Since the contents of these are the same as the contents described in FIG. 4, detailed description will be omitted. The guide members 24 and 26 , which are guide members for the weight guide rails 20 and 22, are fixedly attached to the bottom side of the tank case 94, and the guide members 25 and 27 are fixedly attached to the upper surface side of the tank case 94. . Since the tank case 94 is larger than the tank case 52 described in FIG. 4, the number of steel balls 80 supplied to the tank case 94 is considerable, so the steel balls 80 can be used with a suitable steel ball feeder or the like. It is preferable to supply.

  According to the counterweights 30, 90 of the above configuration, by setting the unit mass of the steel balls 80 to a suitably small mass, it is much more than increasing or decreasing the weight plate 42 having a mass of about 20 to 30 kg per sheet. The balance mass can be increased or decreased with reduced burden. By this, it is possible to reduce the burden on the maintenance worker 8 in the work of increasing and decreasing the balance mass.

  4 steel ball box, 6 supply buckets, 8 maintenance workers, 10 elevators, 12 hoistways, 13 landings, 14 cars, 15 working spaces, 16 lifting ropes, 20, 22 weight guide rails, 24, 25, 26, 27 Guide member 30, 30 counterweight, 32 counterweight frame, 33 guide groove, 34, 35 vertical frame, 36 upper frame, 38 lower frame, 40 weight plate portion, 42 additional weight plate, 44 middle plate, 46 presser Plate, 50, 92 steel ball tank part, 52, 94 tank case, 53 internal space, 54, 56 vertical holding end, 60 steel ball supply port, 62 lid part, 63 steel ball discharge part, 64 steel ball discharge port, 66, 68 outlet door plate, 70 locking bolt, 72, 74 ball size visual window, 76 steel ball arrangement plate, 80 steel ball.

Claims (5)

Two vertical frames parallel to the raising and lowering direction while being disposed in a hoistway provided penetrating from the upper side to the lower side of the building, an upper frame connecting upper end portions of the two vertical frames, and 2 A counterweight frame formed by combining lower frames connecting lower ends of the two vertical frames;
A weight plate portion composed of a predetermined number of additional weight plates stacked and held in the balance weight frame;
A steel ball tank portion containing a predetermined number of steel balls therein, comprising two vertical holding end portions held by each of the two vertical frames of the counterweight frame, from the weight plate portion Also, a steel ball tank unit stacked on the upper side,
Equipped with
The shape of the steel ball tank portion is a parallelogram having the respective vertical holding ends on the oblique side, and dimensions along the width direction including the respective vertical holding ends face each other of the counterweight frames The counterweight of an elevator set so as to be slightly smaller than the distance between the vertical frames . The steel ball tank portion includes a tank case having a steel ball accommodation space therein, and a predetermined number of the steel balls accommodated in the tank case and forming a mass corresponding to a predetermined balance mass.
The tank case is
A steel ball supply port provided on the upper surface,
A steel ball outlet provided on the front side,
The counterweight of an elevator according to claim 1, comprising: The tank case is
A plurality of steel ball arranged plates arranged so that the steel balls flow in a step-like manner from the upper side of the steel ball supply port to the lower side of the steel ball discharge portion in an internal space for accommodating the plurality of steel balls; The elevator counterweight according to claim 2 , comprising. The steel ball discharge unit is
The elevator counterweight according to claim 2 , wherein at least two outlet door plates are stacked to have a steel ball outlet with an opening covered. The tank case is
The counterweight of an elevator according to claim 2 , further comprising a steel ball amount visualizing window provided on the front side surface and capable of visually recognizing the uppermost surface position of the plurality of steel balls housed in the tank case.

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