JP6948854B2 - Weight piece replacement device and method - Google Patents

Description

The present invention relates to a weight piece replacement device used when replacing a weight piece from a balanced weight of an elevator. The present invention also relates to a weight piece replacement method for replacing a weight piece from a balanced weight of an elevator.

Conventionally, there is a balance weight of an elevator described in Patent Document 1. The balance weight includes a weight frame and a plurality of rod-shaped weight pieces, and the weight frame has a pair of vertical frames, an upper frame, and a lower frame. The pair of vertical frames are arranged at intervals in the width direction of the balance weight, the upper frame connects the upper ends of the pair of vertical frames, and the lower frame is the lower end of the pair of vertical frames. Connect each other.

The plurality of rod-shaped weight pieces are held in the weight frame in a state of being stacked in the height direction of the balance weight. Each weight piece extends in the width direction between one vertical frame and the other vertical frame. One end of each weight piece is held by one vertical frame, and the other end of each weight piece is held by the other vertical frame.

A frame band is attached to the balance weight. The frame band has an annular structure and is arranged near the central portion in the height direction of the balance weight. The frame band is attached to the vertical frame so as to surround the pair of vertical frames and weight pieces. The frame band is provided to increase the rigidity of the balance weight in the width direction and to reinforce the balance weight in the width direction. The frame band is provided to prevent the vertical frame from widening outward in the width direction and to prevent the weight piece from falling even if an impact is applied to the vertical frame due to an earthquake or the like.

Japanese Unexamined Patent Publication No. 2014-125311

Depending on the structure of the balance weight, it may be necessary to replace some weight pieces when attaching the frame band to the balance weight. Hereinafter, using FIGS. 7 to 11, the structure of the balance weight 10 in which some weight pieces 3 need to be replaced when the frame band 7 is attached, and the attachment of the frame band 7 to the balance weight 10 The problems that occur in this case will be explained.

The balance weight 10 is a balance weight to which the frame band 7 cannot be attached unless some weight pieces are replaced, and will be used later in the description of the embodiment. Further, in the following description and drawings including the description in the embodiment, the X direction represents the depth direction of the weight piece replacement device attached at a predetermined position, and coincides with the depth direction of the balance weight 10. Further, the Y direction represents the width direction of the weight piece replacement device attached at a predetermined position, and coincides with the width direction of the balance weight 10. Further, the Z direction represents the height direction of the weight piece replacement device attached at a predetermined position, and coincides with the height direction of the balance weight 10. The X, Y, and Z directions are orthogonal to each other. Further, in the present specification, the balance weight before the weight piece 3 is replaced is expressed as the balance weight 10, some weight pieces 3 are replaced with another weight piece 33, and the frame band 7 is attached. The balance weight in a possible state is expressed as the balance weight 11 after the weight piece is replaced. Further, the balance weight 11 after replacing the weight piece to which the frame band 7 is attached is referred to as a balance weight 1 with a band.

FIG. 7 is a front view of the balance weight 10 when viewed from the front, and FIG. 8 is a view of the balance weight 10 when viewed from below as indicated by an arrow D in FIG. Further, FIG. 9 is a plan view showing the positional relationship between the weight piece 33 to which the frame band 7 can be attached and the vertical frames 21a and 21b, and FIG. 10 shows the balance weight 11 after the weight piece is replaced. It is a front view when viewed from the front. Further, FIG. 11 is a front view of the balance weight 1 with a band when viewed from the front. In order to explain the structure of the balance weight 1 with a band in an easy-to-understand manner, the lower frame 23 described below is not shown in FIG.

As shown in FIG. 7, the balance weight 10 includes a weight frame 2, a plurality of rod-shaped weight pieces 3, a sheave 4, four guide shoes 5, and two stoppers 6. The weight frame 2 has a pair of vertical frames 21a and 21b, an upper frame 22, and a lower frame 23. The pair of vertical frames 21a and 21b are arranged at intervals in the Y direction, the upper frame 22 connects the upper ends of the pair of vertical frames 21a and 21b, and the lower frame 23 is a pair of vertical frames. The lower ends of the frames 21a and 21b are connected to each other. The plurality of rod-shaped weight pieces 3 are held in the weight frame 2 in a state of being stacked in the Z direction. Specifically, each weight piece 3 extends in the Y direction between one vertical frame 21a and the other vertical frame 21b. One end of each weight piece 3 is irremovably held by one vertical frame 21a, and the other end of each weight piece 3 is irremovably held by the other vertical frame 21b. The structure in which the weight piece 3 cannot be detached from the vertical frames 21a and 21b will be described later.

The sheave 4 is rotatably attached to the upper frame 22. For example, the sheave 4 is rotatably attached to a columnar shaft portion (not shown) protruding in the X direction from the back side of the upper frame 22 to the back side of the hoistway (the wall side on the back side) via a bearing. .. The balance weight 10 moves up and down in the Z direction based on the tension of the wire rope 9 wound around the sheave 4. The sheave may not be attached to the weight frame, or the tip side of the wire rope may be fixed to the weight frame.

The guide shoes 5 are attached to the four corners of the weight frame 2, and the stoppers 6 are attached to both ends of the weight frame 2 in the Y direction near the center in the Z direction. The guide shoe 5 arranged on one side in the Y direction is fitted to the one side rail 8a located on one side in the Y direction of the balance weight 10 and extending in the Z direction, and is arranged on the other side in the Y direction. The shoe 5 is fitted to the other side rail 8b located on the other side of the balance weight 10 in the Y direction and extending in the Z direction. The stopper 6 prevents the balance weight 10 from coming off the rails 8a and 8b near the central portion in the Z direction. By guiding the guide shoe 5 to the rails 8a and 8b, the balance weight 10 can move up and down in the Z direction without swinging significantly in the Y direction.

As shown in FIG. 8, the vertical frames 21a and 21b have a U-shape with a cut surface parallel to the XY plane, and the U-shaped openings of the vertical frames 21a and 21b are on the weight piece 3 side in the Y direction. It is aimed. The weight piece 3 has projecting portions 3a and 3b protruding outward in the Y direction on both sides in the Y direction, and the projecting portions 3a are arranged in the recesses of the vertical frame 21a having a U-shaped cross section and projecting portions. 3b is arranged in the recess of the vertical frame 21b having a U-shaped cross section. With such a configuration, the weight piece 3 cannot be separated from the weight frame 2.

The length of the vertical frames 21a and 21b in the X direction (length in the width direction) is shorter than the length of the weight piece 3 in the X direction (length in the width direction). On the other hand, as will be described in detail later, the frame band 7 (see FIG. 11) has a structure in which metal plates such as iron plates are arranged in an annular shape, and is located on both sides of the vertical frames 21a and 21b in the X direction. It is attached to the side wall portions 28a, 28b, 29a, 29b extending in the Y direction by bolts. Therefore, since the weight piece 3 shown in FIG. 8 protrudes in the X direction from the vertical frames 21a and 21b, the frame band 7 cannot be attached to the vertical frames 21a and 21b. Therefore, the weight piece 3 existing in the Z direction range (height range) to which the frame band 7 is attached has a length in the X direction (length in the width direction) shorter than the length in the X direction of the frames 21a and 21b. It needs to be replaced with 33 (see FIG. 9).

Conventionally, the weight piece 3 in the mounting Z direction range of the frame band 7 is replaced with the weight piece 33 as follows. Specifically, as shown in FIG. 7, the vertical frame 21a on one side in the Y direction is provided with a notch 34 that opens inward in the Y direction on the upper side in the Z direction. The notch 34 is a cut surface parallel to the YZ plane and has a rectangular shape. In the front view shown in FIG. 7, the notch 34 has a pair of edges extending in the Y direction and one edge extending in the Z direction. .. The length of the notch 34 in the Z direction is longer than the height of the rod-shaped weight pieces 3, 33.

The replacement weight piece 3 is lifted to the notch 34 formation height by one or two workers and then removed from the weight frame 2 using the notch 34. All the weight pieces 3 including the portion above the lower end of the mounting position of the frame band 7 are removed. Subsequently, the short weight piece 33 (see FIG. 9) is housed in the weight frame 2 using the notch 34. By continuously accommodating the plurality of weight pieces 33 in the weight frame 2, all the weight pieces arranged in the Z-direction existence range of the frame band 7 are composed of the weight pieces 33. After that, for example, one or more weight pieces 3 are cut out 34 so that all the weight pieces whose lower end position is located above the upper end of the Z direction existence range of the frame band 7 in the Z direction are composed of the weight pieces 3. It is used and housed in the weight frame 2. In this way, the balance weight 11 is formed after the weight piece is replaced as shown in FIG. 10, and the work of replacing a predetermined number of weight pieces 3 with the weight piece 33 is completed.

After that, as shown in FIG. 11, the frame band 7 is attached to the balance weight 11 after the weight piece is replaced. Although not described in detail, the frame band 7 has an annular structure and is arranged near the central portion in the Z direction of the balance weight 11 after the weight piece is replaced. The weight frame 2 is arranged so as to surround the pair of vertical frames 21a and 21b and the weight piece 33 (see FIG. 10).

The following problems exist with respect to the replacement of the plurality of weight pieces 3 with the weight pieces 33 described above. That is, one weight piece 3 is a heavy object, and the weight can reach up to about 30 kg. Further, the worker is forced to replace the plurality of weight pieces 3 when attaching the frame band 7. Therefore, lifting the weight piece 3 forces the worker to work hard. Therefore, it is of great significance if the worker can reduce the labor of the replacement work of the weight piece 3. Furthermore, it is preferable that the weight piece 3 removed by attaching the frame band 7 can be removed from the site more easily and smoothly.

Therefore, an object of the present invention is to provide a weight piece replacement device and a method capable of reducing the labor for replacing the weight piece and easily and smoothly removing the removed weight piece from the site.

In order to solve the above problems, the weight piece replacement device of the present disclosure has a plurality of rod-shaped weight pieces stacked and a notch for holding the plurality of weight pieces and inserting and removing the weight pieces in an elevator. A weight piece replacement device used when replacing the weight piece from a balanced weight including a weight frame having a weight frame, which can be mounted on the upper side of the weight frame and has a mounting portion on the lower side in the height direction. A pair of sandwiches that include a hoisting machine that winds up the string-shaped member to be held, and a locking portion that locks the bottom surface of the weight piece at the lower end portion in the height direction, and sandwiches both sides of the weight piece in the width direction. A handle that includes an arm, a mounted portion to which the mounting portion is detachably attached, and a grip portion that can be gripped by a person, and connects the mounting portion and the upper portion of each of the pair of holding arms in the height direction. It is provided with a member.

According to the present disclosure , for example, after the hoisting machine is attached to the upper side of the weight frame, the locking portion of the pair of holding arms can be locked to the bottom surface of the weight piece located at the uppermost position in the weight frame. Then, by simply pulling up the string-shaped member with the hoisting machine, the weight pieces sandwiched between the pair of holding arms can be pulled up to a height at which it is easy to work in the weight frame. Then, after that, a maintenance worker or the like can easily grasp the grip portion and manually remove the weight piece from the weight frame through the notch. Therefore, the labor for replacing the weight piece can be reduced.

Further, after removing a plurality of unnecessary weight pieces from the weight frame, the hoisting machine can be removed from the handle member, and one or more unnecessary weight pieces can be held by a pair of holding arms connected to the handle member. .. Then, with the pair of holding arms holding the unnecessary one or more weight pieces, one or more maintenance workers grab the grip portion and grip the one or more weight pieces more easily and smoothly. Can be transported to. Therefore, the removed weight piece can be easily and smoothly removed from the site.

Further, in the present disclosure , the grip portion extends substantially in a first orthogonal direction substantially orthogonal to the height direction, and substantially extends in a second orthogonal direction orthogonal to both the height direction and the first orthogonal direction. The handle member has an extending through hole, and the upper side of each of the pair of holding arms in the height direction is attached, and the handle member is located below the grip portion in the height direction. A pair of arm mounting portions extending substantially parallel to the portions, connecting both ends of the grip portion in the extending direction and both ends of the arm mounting portion in the extending direction, extending in the height direction. Each of the pair of holding arms, including the connecting portion, may have a through hole through which the arm mounting portion passes on the upper side in the height direction.

According to the above configuration, the handle member can be easily and inexpensively configured.

Further, in the present disclosure , the locking portion includes two wedge-shaped members whose tip ends are tapered, each of the pair of holding arms includes a main body portion and the wedge-shaped member, and the wedge-shaped member includes the wedge-shaped member. the the tip side opposite pivotably attached to the main body portion on the lower side of the height direction of the main body portion, said body portion, engaging said wedge-shaped member is locked to the weight piece It may have a stopper that prohibits rotation below the stop position in the height direction.

According to the above configuration, since the tapered tip side of the wedge-shaped member can be easily inserted between the two stacked weight pieces, the bottom surface of the weight piece can be easily locked by the locking portion. Further, since each holding arm has a stopper that prohibits the wedge-shaped member from moving downward in the height direction from the locking position of the weight piece, the weight piece is held while the weight piece is being held by the pair of holding arms. It is possible to suppress the fall from the pair of holding arms.

Further, in the present disclosure , an urging member may be provided in which one end is attached to one of the pair of holding arms and the other end is attached to the other of the pair of holding arms.

According to the above configuration, it is possible to prevent the pair of holding arms from moving in a direction away from each other while holding the weight piece. Therefore, it is possible to prevent the weight piece from falling from the pair of holding arms.

Further, in the present disclosure , each of the pair of holding arms includes a shaft portion provided with a male screw, and further includes a nut that is screwed into the male screw of each of the shaft portions and can move in the height direction. You may.

According to the above configuration, when one or more unnecessary (removed) weight pieces are sandwiched between a pair of holding arms, the nut can be lowered with respect to the shaft portion, and one or more weight pieces to be carried. Can be pressed from above with a nut. Therefore, it is possible to securely lock one or more unnecessary weight pieces in the vertical direction, and it is possible to prevent the one or more weight pieces from falling from the pair of holding arms during transportation.

Further, in the present disclosure , the tip end side of the tool can be inserted into the outside of at least one of the pair of holding arms on the side opposite to the other side of the pair of holding arms, and the upper side in the height direction is. A tool insertion chamber that opens may be provided.

According to the above configuration, when the locking portion is inserted between the stacked weight pieces, a force can be applied to the holding arm by the tool inserted into the tool insertion chamber on the tip side, and the locking portion is repeatedly minute in the vertical direction. Can be moved. Therefore, the tip end side of the locking portion can be easily inserted between the weight pieces.

Further, the weight piece replacement method of the present disclosure includes a plurality of rod-shaped weight pieces stacked and a weight frame having a notch for holding the plurality of weight pieces and inserting and removing the weight pieces in an elevator. It is a weight piece replacement method for replacing the weight piece from the balanced weight including the weight piece using the weight piece replacement device of the present disclosure , wherein the hoisting machine of the weight piece replacement device is placed on the upper side of the weight frame or. The device mounting step for mounting at a predetermined position on the hoistway and the locking portion of the pair of holding arms of the weight piece replacement device are placed on the uppermost side of the plurality of weight pieces housed in the balance weight. After the weight piece holding step of locking to the bottom surface of the positioned weight piece and holding the weight piece from both sides in the width direction of the weight piece with the pair of holding arms, and the weight piece holding step, the winding After the weight piece pulling step of pulling up the string-shaped member with the upper machine to pull up the weight piece held by the pair of holding arms and the weight piece pulling step, the weight piece is said to be said. After the weight piece pulling stop step of stopping the pulling of the string-shaped member by the hoisting machine and the weight piece pulling stop step of the balance weight located below the notch, a person Includes a weight piece removal step of pulling up the pair of holding arms with the grip and then removing the weight piece from the weight frame of the balance weight using the notch.

According to the present disclosure , the labor for replacing the weight piece can be reduced.

Further, in the weight piece replacement method of the present disclosure , after the weight piece removing step, the hoisting machine removing step of removing the hoisting machine from the handle member and one of the weights removed from the weight frame. The locking portion is locked to the bottom surface of one piece, and the one weight piece is sandwiched from both sides in the width direction by the pair of holding arms, or two or more weight pieces removed from the weight frame. The locking portion is locked to the bottom surface of the weight pieces located at the lowermost position in the height direction in a stacked state, and the two or more weight pieces are sandwiched from both sides in the width direction by the pair of holding arms. After the weight piece holding step, the hoisting machine removing step, and the weight piece holding step, the one weight piece held by the pair of holding arms by a person grasping the grip portion of the handle member. Alternatively, it may include a weight piece moving step of moving the two or more weight pieces sandwiched between the pair of holding arms.

According to the above configuration, the removed weight piece can be easily and smoothly removed from the site.

According to the weight piece replacement device and method according to the present invention, the labor for replacing the weight piece can be reduced, and the removed weight piece can be easily and smoothly removed from the site.

It is a figure which shows the state in the process of pulling out a weight piece from a balance weight by using the 1st and 2nd weight piece exchange apparatus which concerns on one Embodiment of this invention. It is a schematic diagram explaining the structure of the hoisting machine and the string-like member, and is the schematic view when the hoisting machine and the string-like member are seen from the direction indicated by the arrow A in FIG. It is a schematic block diagram when the handle member and a pair of holding arms in the 1st weight piece exchange apparatus part are seen from the direction shown by the arrow A in FIG. It is a front view around the connecting part of a handle member and a pair of holding arms. It is a schematic view when the one side holding arm is seen from the direction indicated by the arrow B in FIG. It is a figure which shows the state when a person carries one or more weight pieces 3 which became unnecessary. It is a front view when the balance weight is seen from the front. It is a figure when the balance weight is seen from the lower direction shown by the arrow D in FIG. It is a top view which shows the positional relationship between a weight piece to which a frame band can be attached, and a vertical frame. It is a front view when the balance weight is seen from the front after the weight piece is replaced. It is a front view when the balance weight with a band is seen from the front.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. When a plurality of embodiments and modifications are included in the following, it is assumed from the beginning that a new embodiment is constructed by appropriately combining the characteristic portions thereof.

The balance weight 10 used for explanation in the present embodiment is the same as that described with reference to FIG. 7, and the balance weight 11 after replacement of the weight piece is the same as that described with reference to FIG. Is. Further, the balance weight 1 with a band is the same as that described with reference to FIG. The structures of the balance weight 10, the balance weight 11 after replacing the weight piece, and the balance weight 1 with a band will be omitted in the above description.

FIG. 1 is a diagram showing a state in which the weight piece 3 is being pulled out from the balance weight 10 by using the first and second weight piece replacement devices 50a and 50b according to the embodiment of the present invention. Further, FIG. 2 is a schematic view illustrating the configuration of the hoisting machine 51 and the string-shaped member 52, and is a schematic view of the hoisting machine 51 and the string-shaped member 52 when viewed from the direction indicated by the arrow A in FIG. It is a figure. In this embodiment, the weight piece 3 is replaced by using two weight piece replacement devices, that is, the first and second weight piece replacement devices 50a and 50b. The first weight piece replacement device 50a is attached to one side of the upper frame 22 included in the upper side of the weight frame 2 in the Y direction, and the second weight piece replacement device 50b is attached to the other side of the upper frame 22 in the Y direction. Be done. The first weight piece replacement device 50a is the same as the second weight piece replacement device 50b. Hereinafter, the description of the structure and operation of the second weight piece replacement device 50b will be omitted with the same description of the structure and operation of the first weight piece replacement device 50a.

The first weight piece changing device 50a includes a hoisting machine 51, a string-shaped member 52, a handle member 53, and a pair of holding arms 54. As shown in FIG. 2, the hoisting machine 51 has a first winch 61, a second winch 62, an upper frame mounting portion 63 having a substantially U-shaped cross section, and two bolts 67 and 68. Further, the string-shaped member 52 has a first string-shaped portion 64a, a second string-shaped portion 64b, a third string-shaped portion 64c, and a mounting portion 65. The integrated body including the hoisting machine 51 and the string-shaped member 52 is substantially plane-symmetrical with respect to the YZ plane P that vertically divides the upper frame mounting portion 63 into two equal parts. The first string-shaped portion 64a extends from the first winch 61 to the lower region in the Z direction, and the second string-shaped portion 64b extends from the second winch 62 to the lower region in the Z direction. The first string-shaped portion 64a, the second string-shaped portion 64b, and the third string-shaped portion 64c form a string-shaped portion and have a substantially Y-shaped shape. Specifically, the first string-shaped portion 64a and the second string-shaped portion 64b are integrated at an intersection 69, and the third string-shaped portion 64c extends downward from the intersection 69 in the Z direction due to gravity. The string-shaped portion is composed of, for example, a string made of fibers, a wire rope, or the like.

The first winch 61 is the same as the second winch 62, and the first winch 61 and the second winch 62 perform the same operation at the same timing, for example, by a remote controller or the like. The first and second winches 61, 62 are attached to the upper surface of the top plate portion 63a of the upper frame mounting portion 63 by mounting means, for example, a fastening member, welding, or the like. The first winch 61 appropriately decelerates the rotational force of the rotating portion (not shown) by a gear mechanism or the like and transmits it to the drum, and the rotating drum (not shown) winds up the first string-shaped portion 64a. Then, tension is applied to the first string-shaped portion 64a. Further, the second winch 62 also appropriately decelerates the rotational force of the rotating portion (not shown) by a gear mechanism or the like and transmits it to the drum, and the rotating drum (not shown) winds up the second string-shaped portion 64b. Tension is applied to the second string-shaped portion 64b.

The upper frame mounting portion 63 having a substantially U-shaped cross section is mounted on the upper frame 22 (see FIG. 1) of the weight frame 2. The upper frame mounting portion 63 having a substantially U-shaped cross section has a first side plate portion 63b and a second side plate portion 63c in addition to the top plate portion 63a. The first side plate portion 63b extends downward in the Z direction on the YZ plane from the end portion of the top plate portion 63a on one side in the X direction, and the second side plate portion 63c is the end portion of the top plate portion 63a on the other side in the X direction. Spreads downward on the YZ plane in the Z direction.

The distance between the first side plate portion 63b and the second side plate portion 63c in the X direction is slightly larger than the dimension of the upper frame 22 in the X direction. With the bottom surface of the top plate portion 63a in contact with the upper surface of the upper frame 22, the first side plate portion 63b is fixed to the back side surface of the upper frame 22 on one side in the X direction with bolts 67, and the second side plate portion 63c Is fixed to the front side surface of the upper frame 22 on one side in the X direction with a bolt 68. In this way, the first weight piece replacement device 50a is fixed to the upper frame 22.

The end of the third string-shaped portion 64c on the side opposite to the intersection 69 side is attached to the attachment portion 65. Specifically, the mounting portion 65 is an integral metal member, has a wacker 65a and a hook 65b, and the hook 65b extends outward in the radial direction of the wacker 65a from the outer peripheral portion of the wacker 65a. The end of the third string-shaped portion 64c opposite to the intersection 69 side is attached to the wacker 65a.

Next, the structure of the handle member 53 and the pair of holding arms 54 will be described. As shown in FIG. 1, the handle member 53 has a substantially rectangular frame-like shape. Specifically, the handle member 53 includes a grip portion 80, an arm mounting portion 81, and a pair of connecting portions 82, 83. The grip portion 80 extends in the first orthogonal direction substantially orthogonal to the Z direction, and extends substantially in the second orthogonal direction perpendicular to both the Z direction and the first orthogonal direction (see FIG. 3). Has. In the example shown in FIG. 1, the first orthogonal direction coincides with the substantially Y direction, and the second orthogonal direction coincides with the substantially X direction. Further, the arm mounting portion 81 is located below the grip portion 80 in the Z direction and extends substantially parallel to the grip portion 80. The pair of connecting portions 82, 83 extend in the Z direction, and connect both ends of the grip portion 80 in the extending direction and both ends of the arm mounting portion 81 in the extending direction.

FIG. 3 is a schematic configuration diagram of the handle member 53 and the pair of holding arms 54 in the first weight piece changing device 50a when viewed from the direction indicated by the arrow A in FIG. As shown in FIG. 3, the hook 65b is locked in the through hole 84 of the grip portion 80. The through hole 84 is an example of the mounted portion. By locking the hook 65b to the through hole 84, the string-shaped member 52 is connected to the handle member 53. Further, the upper end portions of the pair of holding arms 54 are attached to the arm attachment portion 81.

Next, the connection structure of the pair of holding arms 54 to the handle member 53 will be described with reference to FIG. FIG. 4 is a front view of the vicinity of the connecting portion of the handle member 53 and the pair of holding arms 54. With reference to FIG. 4, the arm mounting portion 81 has a solid round bar structure. Further, one side holding arm 54a of the pair of holding arms 54 includes a through hole 87a extending in the Y direction at the upper end portion, and the other side holding arm 54b of the pair of holding arms 54 includes a through hole 87a extending in the Y direction at the upper end portion. Includes a through hole 87b extending into.

Each of the two through holes 87a and 87b is larger than the diameter of the rod-shaped arm mounting portion 81. The arm mounting portion 81 passes through the through hole 87a of the one-side holding arm 54a and the through hole 87b of the other-side holding arm 54b. With the arm mounting portion 81 passing through the two through holes 87a and 87b, one end of the arm mounting portion 81 is fixed to the lower side of the connecting portion 82 on one side by a joining means such as welding or an adhesive. The other end of the arm mounting portion 81 is fixed to the lower side of the connecting portion 83 on the other side by a joining means such as welding or an adhesive. With such a structure, the one-sided and the other-side holding arms 54a and 54b are rotatably connected to the rod-shaped arm mounting portion 81, respectively.

Again, with reference to FIG. 3, the one-side holding arm 54a includes a body 60 and a wedge-shaped member 73 as an example of a locking portion. The main body portion 60 has an integral structure and includes a first extending portion 60a, a second extending portion 60b, and a tool inserting portion 60c. The first extending portion 60a extends linearly in one direction, and a through hole 87a (see FIG. 4) is provided at one end in the extending direction. Further, the second extending portion 60b extends linearly in the other direction from the end portion of the first extending portion 60a on the side opposite to the through hole 87a side. The second extending portion 60b includes a round bar-shaped portion provided with a male screw 97 at a central portion other than both end portions. A nut 75 is screwed into the male screw 97. By rotating the nut 75 clockwise or counterclockwise by a desired amount, the nut 75 can move in a range in the Z direction in which the male screw 97 is provided. The second extending portion does not have to have a round bar-shaped portion provided with a male screw, and the weight piece changing device does not have to have a nut.

The first extending portion 60a and the second extending portion 60b intersect at an obtuse angle θ1. The obtuse angle θ1 is preferably set to an angle in the range of 100 ° to 130 °. The wedge-shaped member 73 is rotatably attached to an end portion of the second extending portion 60b on the side opposite to the first extending portion 60a side. The tapered tip portion of the wedge-shaped member 73 projects from the tip end side of the second extending portion 60b to one side region in the X direction.

FIG. 5 is a schematic view of the one-side holding arm 54a when viewed from the direction indicated by the arrow B in FIG. Next, the attachment structure of the wedge-shaped member 73 to the main body 60 will be described with reference to FIG. In FIG. 5, the tool insertion portion 60c, which is irrelevant to the mounting structure, is not shown. As shown in FIG. 5, the second extending portion 60b has a recess 79 on the outer side in the extending direction at an end opposite to the side of the first extending portion 60a, and the side surface of the recess 79 has a recess 79. It is defined by a first side wall portion 88 and a second side wall portion 89 located on both sides of the recess in the Y direction. Further, the second extending portion 60b has a shaft member 90, and the shaft member 90 extends in the Y direction between the first side wall portion 88 and the second side wall portion 89 so as to cross the recess 79.

Again, referring to FIG. 3, the wedge-shaped member 73 has a through hole 92 at the end on the wall thickness side through which the shaft member 90 passes and extends in the Y direction. The diameter of the through hole 92 is slightly smaller than the diameter of the shaft member 90. With this configuration, the wedge-shaped member 73 becomes rotatable with respect to the shaft member 90. When the wedge-shaped member 73 rotates counterclockwise or more as shown by an arrow C in FIG. 3, the upper corner portion of the wedge-shaped member 73 on the thick side in the Z direction comes into contact with the bottom surface 93 of the recess 79. This contact prohibits the wedge-shaped member 73 from further rotating counterclockwise. The bottom surface 93 of the recess 79 constitutes a stopper. The maximum angle θ2 formed by the wedge-shaped member 73 and the second extending portion 60b is preferably set to an angle in the range of, for example, 80 ° to 110 °, but may be set to any other angle.

The tool insertion portion 60c is attached to the side surface of the second extending portion 60b on the side opposite to the protruding side of the wedge-shaped member 73. The tool insertion portion 60c defines a tool insertion chamber 95 in which only the upper side in the Z direction opens. The tip of a tool 99 such as a spanner can be inserted into the tool insertion chamber 95. The other side holding arm 54b is different from the one side holding arm 54a only in that it does not have the tool insertion portion 60c. The tool insertion portion may be provided on both one side and the other side holding arm, and may not be provided on either one side or the other side holding arm. The description of the other side holding arm 54b having a structure similar to that of the one side holding arm 54a will be omitted.

The first weight piece replacement device 50a includes a vine winding spring 71 as an example of the urging member. One end of the vine winding spring 71 is attached to the first extending portion 60a of the one-side holding arm 54a, and the other end of the vine winding spring 71 is attached to the first extending portion 60a of the other side holding arm 54b. .. One end and the other end of the vine winding spring 71 are attached to the same height by the one-side holding arm 54a and the other side holding arm 54b, and the vine winding spring 71 extends in the substantially Y direction. Due to the arrangement of the vine winding spring 71, the dimension of the gap in the X direction between the second extending portion 60b of the one-side holding arm 54a and the second extending portion 60b of the other side holding arm 54b is the natural length of the vine winding spring 71. It is less likely to be longer and shorter than in the state of. When the vine winding spring 71 has a natural length or is extended, the length of the gap between the second extending portions 60b of the one-side and the other-side holding arms 54a and 54b in the Y direction is the weight piece 3. It is preferable that it matches the length of.

It should be noted that any urging member other than the vine winding spring may be arranged between the first extending portion of the one-side holding arm and the first extending portion of the other holding arm, for example, curved. The leaf spring may be arranged so that the convex portion faces the upper side or the lower side in the Z direction. Alternatively, the urging member may be arranged between the second extending portion of the one-side holding arm and the second extending portion of the other holding arm. Alternatively, no urging member may be arranged between the one-sided holding arm and the other-side holding arm.

In the above configuration, for example, a predetermined number of weight pieces 3 are taken out from the balance weight 10 as follows.

First, the hoisting machine 51 of the first weight piece changing device 50a is attached to one side of the upper frame 22 of the weight frame 2 in the Y direction, and the hoisting machine 51 of the second weight piece changing device 50b is mounted on the weight frame 2. It is attached to the other side of the frame 22 in the Y direction. After that, the wedge-shaped member 73 of the pair of holding arms 54 of the first weight piece replacement device 50a is attached to the bottom surface of the weight piece 3 located at the uppermost position among the plurality of weight pieces 3 housed in the balance weight 10. While locking, the weight piece 3 is sandwiched from both sides of the weight piece 3 in the X direction by a pair of holding arms 54. Further, the wedge-shaped member of the pair of holding arms of the second weight piece replacement device 50b is locked to the bottom surface of the weight piece 3 located at the uppermost position among the plurality of weight pieces 3 housed in the balance weight 10. At the same time, the weight piece 3 is held by a pair of holding arms from both sides of the weight piece 3 in the X direction. Since the string-shaped portion has a Y-shape, the hook 65b can be positioned at the center in the X direction, and the weight piece 3 can be locked in a well-balanced manner.

Subsequently, with the hoisting machines 51 of the first and second weight piece changing devices 50a and 50b, the first string-shaped portion 64a and the second string-shaped portion 64b of the string-shaped member 52 are moved at the same timing and at the same speed. By pulling up, the weight piece 3 held by the pair of holding arms 54 in each of the first and second weight piece replacement devices 50a and 50b is pulled up.

After that, with the weight piece 3 located below the notch 34 of the balance weight 10, the two hoisting machines 51 stopped pulling up the string-shaped member 52, and then the person first and second. After pulling up the two pairs of holding arms 54 by holding the gripping portions 80 of the weight piece changing devices 50a and 50b, the weight piece 3 is removed from the weight frame 2 of the balance weight 10 using the notch 34.

The difference from the conventional method of replacing the predetermined number of weight pieces 3 with the weight pieces 33 described with reference to FIGS. 7 to 11 is one of the work of taking out the weight pieces 3 which was performed manually without using any device. This is a point in which the first and second weight piece replacement devices 50a and 50b are used. After replacing a predetermined number of weight pieces 3 with weight pieces 33, the work is completed when the frame band 7 is attached to the Z direction range in which the weight pieces 33 are arranged. Even when the weight piece 33 and the weight piece 3 are inserted, the first and second weight piece replacement devices 50a and 50b may be used when lowering the weight piece 33 and the weight piece 3 in the weight frame 2. good.

After the installation work of the frame band 7 is completed, the plurality of weight pieces 3 that have been replaced and are no longer needed are removed from the site. This removal can be performed, for example, as follows. First, in each of the weight piece changing devices 50a and 50b, the hoisting machine 51 is removed from the handle member 53.

Next, in each of the weight piece replacement devices 50a and 50b, the wedge-shaped member 73 is locked to the bottom surface of the one weight piece 3 removed from the weight frame 2, and the one weight piece 3 is held by the pair of holding arms 54. A wedge-shaped member 73 is engaged with the bottom surface of the weight piece 3 located at the lowermost position in the height direction in a state where two or more weight pieces 3 that are sandwiched from both sides in the width direction or removed from the weight frame 2 are stacked. It is stopped and the pair of holding arms 54 hold the two or more weight pieces 3 from both sides in the width direction.

After that, when a person grasps the grip portion 80 of the handle member 53, one weight piece 3 sandwiched by the pair of holding arms 54 or two or more weight pieces 3 sandwiched by the pair of holding arms 54 is moved. Remove from the scene.

According to the above embodiment, after the hoisting machine 51 of each weight piece changing device 50a, 50b is attached to the upper side of the weight frame 2, the wedge shape of the pair of holding arms 54 of each weight piece changing device 50a, 50b. The member 73 can be locked to the bottom surface of the weight piece 3 located at the uppermost position in the weight frame 2. Then, by simply pulling up the string-shaped member 52 with each hoisting machine 51, the weight pieces 3 sandwiched between the pair of holding arms 54 can be pulled up to a height at which it is easy to work in the weight frame 2. Then, after that, a maintenance worker or the like can easily grasp the grip portion 80 and manually remove the weight piece 3 from the weight frame 2 via the notch 34. Therefore, the labor for replacing the weight piece can be reduced.

Further, as shown in FIG. 6, that is, a figure showing a state when a person carries one or more weight pieces 3 that are no longer needed, a plurality of unnecessary weight pieces 3 are removed from the weight frame. After that, the hoisting machine 51 can be removed from the handle member 53, and one or more weight pieces 3 that are no longer needed can be sandwiched by the pair of holding arms 54 connected to the handle member 53 (in FIG. 6, two weight pieces 3 are sandwiched). An example of doing this). Then, in a state where the pair of holding arms 54 are holding the unnecessary one or more weight pieces 3, one or more maintenance workers grab the grip portion 80 and hold the one or more weight pieces 3. It can be transported more easily and smoothly. Therefore, the removed weight piece 3 can be easily and smoothly removed from the site.

Further, since each of the pair of holding arms 54 includes two wedge-shaped members 73 having a tapered tip side, it is easy to insert the tapered tip side of the wedge-shaped member 73 between the two stacked weight pieces 3. , It is easy to lock the bottom surface of the weight piece 3 with the locking portion. Further, since each of the holding arms 54a and 54b has a stopper (bottom surface 93 of the recess 79) that prohibits the wedge-shaped member 73 from moving downward in the height direction from the locking position of the weight piece 3, a pair. It is possible to prevent the weight piece 3 from falling from the pair of holding arms 54 while the weight piece 3 is being held by the holding arm 54.

Further, since the vine winding spring 71 is provided with one end attached to one of the pair of holding arms 54 and the other end attached to the other of the pair of holding arms 54, the pair of holding arms 54 attaches the weight piece 3. It is possible to suppress the movement in the direction away from each other during pinching. Therefore, it is possible to prevent the weight piece 3 from falling from the pair of holding arms 54.

Further, each of the pair of holding arms 54 includes a shaft portion provided with a male screw 97, and further includes a nut 75 that is screwed into the male screw 97 of each shaft portion and can move in the height direction. Therefore, as shown in FIG. 6, when the unnecessary (removed) one or more weight pieces 3 are sandwiched between the pair of sandwiching arms 54, the nut 75 can be lowered with respect to the shaft portion and transported. One or more weight pieces 3 can be pressed from above with the nut 75. Therefore, it is possible to securely lock one or more weight pieces 3 that are no longer needed in the vertical direction, and it is possible to prevent the one or more weight pieces 3 from falling from the pair of holding arms 54 during transportation.

Further, a tool insertion chamber 95 is provided on the outside of at least one of the pair of holding arms 54 on the side opposite to the other side, so that the tip side of the tool can be inserted and the upper side in the height direction opens. Therefore, when the wedge-shaped member 73 is inserted between the stacked weight pieces 3, a force can be applied to the holding arm 54 by the tool 99 whose tip side is inserted into the tool insertion chamber 95, and the wedge-shaped member 73 is repeatedly minute in the vertical direction. Can be moved. Therefore, the tip end side of the wedge-shaped member 73 can be easily inserted between the weight pieces.

The present invention is not limited to the above-described embodiment and its modifications, and various improvements and modifications can be made within the scope of the claims of the present application and the equivalent scope thereof.

For example, in the above embodiment, the case where the weight piece 3 is lifted by using the two weight piece replacement devices 50a and 50b has been described, but the weight piece may be lifted by using only one weight piece replacement device. In this case, it is preferable to attach one weight piece replacement device to the central portion of the weight frame of the balance weight in the width direction.

Further, although the case where each of the weight piece changing devices 50a and 50b has two first and second winches 61 and 62 has been described, the weight piece changing device may have only one winch. Further, the case where the hook 65b of the string-shaped member 52 is locked to the through hole 84 of the handle member 53 has been described, but the tip portion of the string-shaped member is placed on the upper side of the handle member having an annular structure (for example, a rectangular frame structure). The string-shaped member may be attached to the handle member by tying it to the handle member. Further, the case where the hoisting machine 51 of the weight piece changing devices 50a and 50b is fixed to the upper frame 22 of the weight frame 2 has been described, but the hoisting machine of the weight piece changing device is provided in the hoistway. It may be fixed to a locking portion, for example, an angle installed in the hoistway, or may be fixed to a place other than the weight frame.

2 weight frame, 3 weight piece, 10 balance weight, 22 upper frame, 34 notch, 50a, 50b weight piece switching device, 51 hoisting machine, 52 string-shaped member, 53 handle member, 54 pair of pinching arms, 60 pinching Arm body, 65 mounting part, 71 spiral spring, 73 wedge-shaped member, 75 nut, 80 gripping part, 81 arm mounting part, 82,83 connecting part, 84 through hole of gripping part, 87a, 87b Pair of holding arms Through hole, 93 recess bottom surface (stopper), 95 tool insertion chamber, 97 male screw, Z direction height direction.

Claims (7)

When replacing the weight piece from a balanced weight including a plurality of stacked rod-shaped weight pieces and a weight frame having a notch for holding the plurality of weight pieces and inserting / removing the weight pieces in an elevator. It is a weight piece replacement device used for
A hoisting machine that can be mounted on the upper side of the weight frame and has a mounting portion on the lower side in the height direction to wind up a string-shaped member.
A pair of holding arms that include a locking portion for locking the bottom surface of the weight piece at the lower end in the height direction and hold both sides in the width direction of the weight piece.
A handle member that includes a attachment portion to which the attachment portion is detachably attached and a grip portion that can be gripped by a person, and connects the attachment portion and the upper portion of each of the pair of holding arms in the height direction. With
On the outside of at least one of the pair of holding arms on the side opposite to the other side of the pair of holding arms, there is a tool insertion chamber in which the tip side of the tool can be inserted and the upper side in the height direction opens. A weight piece replacement device provided. When replacing the weight piece from a balanced weight including a plurality of stacked rod-shaped weight pieces and a weight frame having a notch for holding the plurality of weight pieces and inserting / removing the weight pieces in an elevator. It is a weight piece replacement device used for
A hoisting machine that can be mounted on the upper side of the weight frame and has a mounting portion on the lower side in the height direction to wind up a string-shaped member.
A pair of holding arms that include a locking portion for locking the bottom surface of the weight piece at the lower end in the height direction and hold both sides in the width direction of the weight piece.
A handle member that includes a attachment portion to which the attachment portion is detachably attached and a grip portion that can be gripped by a person, and connects the attachment portion and the upper portion of each of the pair of holding arms in the height direction. With
The grip portion extends substantially in a first orthogonal direction substantially orthogonal to the height direction, and has a through hole substantially extending in a second orthogonal direction orthogonal to both the height direction and the first orthogonal direction. Have and
The handle member is
An arm mounting portion to which the upper side of each of the pair of holding arms in the height direction is attached, is located on the lower side in the height direction of the grip portion, and extends substantially parallel to the grip portion.
Includes a pair of connecting portions that connect both ends of the grip portion in the extending direction and both ends of the arm mounting portion in the extending direction and extend in the height direction.
Each of said pair of holding arms have a through-hole through which the arm attachment portion passes the upper side of the height direction,
The arm mounting portion has a solid round bar shape and has a solid round bar shape.
Each of the pair of holding arms is rotatably connected to the arm mounting portion.
The pair of holding arms, the connecting position in the width direction of the counterweight relative to the arm mounting portion that different from each other, the weight piece replacement apparatus. In the weight piece replacement device according to claim 1 or 2.
The locking portion includes two wedge-shaped members whose tip side is tapered.
Each of the pair of holding arms includes a main body portion and the wedge-shaped member.
The wedge-shaped member is rotatably attached to the lower side of the main body portion in the height direction on the side opposite to the tip end side with respect to the main body portion.
The body portion includes a stopper for prohibiting that said wedge member is rotated to the lower side of the height direction than the locking position for locking said weight piece, weight piece replacement apparatus. In the weight piece replacement device according to any one of claims 1 to 3.
A weight piece replacement device comprising an urging member having one end attached to one of the pair of holding arms and the other end attached to the other of the pair of holding arms. In the weight piece replacement device according to any one of claims 1 to 4.
Each of the pair of holding arms includes a shaft portion provided with a male screw.
Further, a weight piece replacement device including a nut that is screwed into the male screw of each of the shaft portions and is movable in the height direction. Claims 1 to 5 from a balanced weight including a plurality of stacked rod-shaped weight pieces and a weight frame having a notch for holding the plurality of weight pieces and inserting and removing the weight pieces in an elevator. A weight piece replacement method for replacing the weight piece using the weight piece replacement device according to any one of the above.
A device mounting step for mounting the hoisting machine of the weight piece replacement device on the upper side of the weight frame or at a predetermined position on the hoistway.
The locking portion of the pair of holding arms of the weight piece replacement device is locked to the bottom surface of the weight piece located at the uppermost position among the plurality of weight pieces housed in the balance weight. and a weight Katakyoji step that Soo clamping the weight piece from both sides in the width direction of the weight piece by the pair of holding arms,
After the weight piece holding step, a weight piece pulling step for pulling up the weight piece held by the pair of holding arms by pulling up the string-shaped member with the hoisting machine, and a weight piece pulling step.
After the weight piece pulling step, the weight piece pulling stop for stopping the pulling of the string-shaped member by the hoist in a state where the weight piece is located below the notch of the balance weight. Steps and
After the weight piece pulling stop step, after a person holds the grip portion and pulls up the pair of holding arms, the weight piece is removed from the weight frame of the balance weight by using the notch. With the removal step
Weight piece replacement method including. In the weight piece replacement method according to claim 6,
After the weight piece removing step, the hoisting machine removing step for removing the hoisting machine from the handle member, and the hoisting machine removing step.
The locking portion is locked to the bottom surface of the one weight piece removed from the weight frame, and the one weight piece is sandwiched from both sides in the width direction by the pair of holding arms, or the weight frame. The locking portion is locked to the bottom surface of the weight piece located at the lowermost position in the height direction in a state where the two or more weight pieces removed from the above are stacked, and the two or more weight pieces are used by the pair of holding arms. A weight piece holding step for holding the weight piece from both sides in the width direction, and a weight piece holding step.
After the hoisting machine removing step and the weight piece holding step, the one weight piece or the pair of holding arms held by the pair of holding arms by a person grasping the grip portion of the handle member. A weight piece moving step that moves the two or more weight pieces sandwiched between the two or more.
Weight piece replacement method including.

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