JP4597595B2 - Hoisting machine installation equipment - Google Patents

Description

  The present invention relates to a hoisting machine installation facility for installing a hoisting machine on a hoisting machine mounting base near the top of an elevator hoistway.

  2. Description of the Related Art Conventionally, a hoisting machine installation facility for installing a hoisting machine on a hoisting machine mounting base fixed near the top of an elevator hoistway is known. Such hoisting machine installation equipment is attached to the ceiling surface of the hoistway above the hoisting machine mounting base and is connected to the pulley on which the tow rope is hung and to the tow rope to fix the hoisting machine. There is known a hoisting machine transporting table that is transported and a traction device that is provided on the wall surface of the hoistway and that pulls the traction rope. The hoisting machine carriage and the traction device are connected via a traction rope hung on the pulley.

  In such a hoisting machine installation facility, first, the hoisting machine is fixed to the hoisting machine carrier at a lower level than the hoisting machine mounting base. Next, by pulling the pulling rope downward by the pulling device, the hoisting machine carrier is lifted upward by the pulling rope via the pulley attached to the ceiling surface.

  When the hoisting machine carrier is lifted to the same level as the hoisting machine mounting table, the hoisting machine carriage is pivotally locked to a hook attached to the hoisting machine installation table. . Finally, the hoisting machine is removed from the hoisting machine carriage and installed on the hoisting machine mounting table.

In addition, as another hoisting machine installation equipment for installing the hoisting machine on the hoisting machine mounting table, as shown in FIG. 10, the hoisting machine carrying base 83 whose vertical height is larger than the height of the hoisting machine 80. The one using is known. In FIG. 10, a guide rail 84 for guiding the vertical movement of the hoisting machine carrier 83 is provided, and the tow rope 82 a is connected to the lower end of the hoisting machine carrier 83. Further, the pulley 81 is installed not at the ceiling surface of the hoistway 85 but at a level that is lower than the hoisting machine mounting base 80a (for example, see Patent Document 1).
In such a hoisting machine installation facility, the hoisting machine 80 is fixed to the upper surface of the hoisting machine carrier 83, and the hoisting machine carrier 83 is moved vertically upward along the guide rail 84 by the traction device 82. It can be lifted.

JP 2000-34072 A

  However, in the hoisting machine installation equipment in which the pulley is installed on the ceiling surface of the hoistway, if there is not enough clearance between the hoistway ceiling surface and the hoisting machine mounting base, the pulley is installed on the ceiling surface. It may be difficult to secure a space for installation. In addition, when the hoisting machine is lifted, the distance between the pulley and the hoisting machine carrier cannot be secured sufficiently, and it may take time to install the hoisting machine on the hoisting machine installation base. is there.

  Further, in the hoisting machine installation facility shown in Patent Document 1, when installing the hoisting machine, the space behind the hoistway and behind the hoisting machine mounting base is operated when the hoisting machine is installed as shown in FIG. It needs to be used as a space. If there are obstacles in this space, it may be difficult to install a tow rope or a towing device.

  The present invention has been made in consideration of the above points, and can reduce the work space when installing the hoisting machine, and the hoisting machine is not interfered with obstacles in the hoistway. The purpose is to provide installation equipment.

The present invention relates to a hoisting machine installation facility for installing a hoisting machine on a hoisting machine mounting base fixed near the top of an elevator hoistway, and a lifting hook with which the hoisting machine fixed to the hoistway is engaged. A lifting structure provided at an upper portion of the lifting structure at one end of the lifting structure, and a hoisting machine mounting portion for mounting and fixing the hoisting machine on an upper surface ; and at the other end of the lifting structure A pressing unit that is provided on the opposite side of the hoisting machine mounting unit with respect to the lifting hook, and a horizontal movement mechanism that horizontally moves the hoisting machine on the hoisting machine mounting unit. The hoisting machine mounting portion is provided at a position above the lifting hook in the lifting structure , and when the lifting structure is lifted to the lifting machine by the lifting hook, Force downward against the pressing part When the hoisting machine mounting part moves upward, the hoisting machine mounting part reaches the same level as the hoisting machine mounting base, and the hoisting machine mounting is performed by the horizontal movement mechanism. The hoisting machine installation equipment is characterized in that the hoisting machine on the mounting portion is horizontally moved to the hoisting machine installation base side.

  By using such a hoisting machine installation facility, it is not necessary to use the space above and behind the hoisting machine mounting base as a work space when installing the hoisting machine. For this reason, the work space required when installing the hoisting machine can be reduced, and it is not interfered by obstacles in the hoistway. In addition, the moving posture of the lifting structure in the lifting process of the hoisting machine can be made somewhat free. Further, since the work using the lifting machine is performed only once, the number of work processes can be reduced.

In this hoist installation equipment, it is preferable that a weight mounting table for mounting a weight is provided in the vicinity of the pressing portion at the other end of the lifting structure.
By using such a hoisting machine installation equipment, the weight of the hoisting machine is offset by placing the weight on the weight placing table, so the magnitude of the force that acts downward on the pressing part is reduced. Can be reduced.

Moreover, in this hoisting machine installation equipment, in the lifting structure, the distance between the lifting hook and the hoisting machine mounting part is smaller than the distance between the lifting hook and the pressing part. It is preferable.
By using such hoisting machine installation equipment, the force that acts downward on the pressing portion by the moment of force centered on the lifting hook can be made smaller than the weight of the hoisting machine.

  According to the hoisting machine installation equipment of the present invention, the work space for installing the hoisting machine can be reduced, and it is not interfered by obstacles in the hoistway.

First Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. 1 to 4 are diagrams showing a first embodiment of the present invention.
1 is a side view showing the configuration of the hoisting machine installation equipment according to the first embodiment, and FIG. 2 is a front view of the hoisting machine installation equipment of FIG. 1 as viewed from the front (left side in FIG. 1). FIG. 3 is a top view of the hoist installation equipment of FIG. 1 as viewed from above. FIG. 4 is a side view showing a state where the hoisting machine is lifted by the lifting mechanism of the hoisting machine installation equipment of FIG.

The hoisting machine installation equipment according to the present invention is for installing the hoisting machine 10 on the hoisting machine mounting base 10a fixed in the vicinity of the top of the elevator hoistway 15.
That is, as shown in FIGS. 1 to 3, the hoisting machine installation facility is disposed in the hoistway 15, and the hoisting machine 10 is placed at a level P lower than the hoisting machine installation base 10a. A lifting mechanism 20 that lifts the hoisting machine 10 upward in the vertical direction so as to have the same level Q as the hoisting machine mounting table 10a, and a hoisting machine that is installed on the lifting mechanism 20 and lifted by the lifting mechanism 20 A horizontal movement mechanism 30 is provided that horizontally moves the hoisting machine 10 having the same level Q as the mounting base 10a and installs it on the hoisting machine base 10a.

The lifting mechanism 20 has a hoisting machine mounting base 23 as shown in FIG. A round bar 23a is provided at one end of the hoisting machine mounting base 23, and this round bar 23a is rotatably fitted to a concave hook 11a of the bracket 11 provided on the side surface of the hoisting machine mounting base 10a. Combined and held by the stopper 11b.
Further, a lifting hook 23 b with which the lifting machine 16 fixed to the hoistway 15 is engaged is provided at the other end of the hoisting machine mounting base 23.
The lifting mechanism 20 is supported in a horizontal state in the hoistway 15 by being held by the bracket 11 and the lifting machine 16.

  As described above, the bracket 11 having the hook 11a is provided on the side surface on the lifting mechanism 20 side of the hoisting machine mounting base 10a. The bracket 11 is attached to the hoisting machine mounting base by the bolt 17 as shown in FIG. 10a.

  Further, on the upper surface of the hoisting machine mounting base 10a, for example, two pulleys 12a that have a shaft orthogonal to the paper surface of FIG. 1 and are rotatable, and a pulley base 12 that holds the pulley 12a are provided. ing. The pulley base 12 is attached to the bracket 11 with bolts.

  As shown in FIG. 1, the lifting mechanism 20 includes, in addition to the above-described hoisting machine mounting base 23, a hoisting machine lifting base 21 for placing the hoisting machine 10 and holding the hoisting machine 10, There is provided a jack 22 attached to the lower surface of the hoisting base 21 and lifting the hoisting base 21 upward in the vertical direction. The jack 22 is held on the upper surface of the hoisting machine mounting base 23.

  A shoe 21 a that restricts the vertical movement of the hoisting stand 21 is attached to the hoisting stand 21.

  Further, as shown in FIG. 1, the hoisting machine mounting base 23 is provided with an elongated hole 23c that extends in the vertical direction and guides the shoe 21a of the hoisting machine lifting base 21 in the vertical direction.

  The jack 22 extends and contracts in the vertical direction while being supported by the hoisting machine mounting base 23 as shown in FIGS. 1 and 4, and when the jack 22 is contracted, the hoisting machine 10 is at the level P. The hoisting machine 10 is held at a height of level Q (see FIG. 4) when the jack 22 is extended and held at a height (see FIG. 1).

As shown in FIGS. 2 and 4, the horizontal movement mechanism 30 includes a pair of hoisting carriages 31 attached to the upper surface of the hoisting stand 21 of the lifting mechanism 20 with bolts.
The hoisting machine 10 is attached to the upper surface of the hoisting machine carriage 31 with bolts 13.

  Next, the operation of the present embodiment having such a configuration will be described.

In installing the hoisting machine 10 on the hoisting machine mounting base 10a using the hoisting machine installation equipment, first, the round bar 23a provided at one end of the hoisting machine mounting base 23 of the lifting mechanism 20 is installed in the hoisting machine installation. It is rotatably fitted to a hook 11a of a bracket 11 provided on the side surface of the base 10a and is held by a stopper 11b. At the same time, a lifting hook 23 b provided at the other end of the hoisting machine mounting base 23 is lifted by the lifting machine 16 fixed to the hoistway 15.
Accordingly, the hoisting machine mounting base 23 is held in a horizontal state in the hoistway 15 as shown in FIG. At this time, the jack 22 of the lifting mechanism 20 is in a contracted state as shown in FIG.

  Next, the hoisting machine 10 prepared on the floor surface is lifted by a hoisting machine (not shown), and the hoisting machine cart provided on the upper surface of the hoisting machine lifting base 21 as shown in FIGS. 31. Thereafter, the hoisting machine 10 is fixed to the hoisting machine carriage 31 with the bolts 13.

Next, in a state where the hoisting machine 10 is at the level P as shown in FIG. 1, the jack 22 extends vertically upward, and the jack 22 moves the hoisting machine 10 to the level as shown in FIG. Lift up to Q level.
At this time, the shoe 21a of the hoisting stand 21 is guided by the long hole 23c of the hoisting machine mounting base 23, so that the hoisting machine 10 can be reliably lifted upward in the vertical direction.

  Thereafter, as shown in FIG. 4, the hoisting machine 10 that is lifted by the lifting mechanism 20 and has the same level Q as the hoisting machine mounting base 10 a is hoisted by the hoisting machine carriage 31 of the horizontal movement mechanism 30. It is horizontally moved to the machine mounting base 10a side (right side in FIG. 4). The hoisting machine 10 is further horizontally moved by a pulley 12a provided on the hoisting machine mounting base 10a, and is installed right above the hoisting machine mounting base 10a.

  As described above, according to the present embodiment, when the hoisting machine 10 is installed, it is not necessary to use the space above and behind the hoisting machine mounting base 10a (right side in FIG. 1) as a work space. For this reason, a work space required when installing the hoisting machine 10 can be reduced, and it is not interfered by an obstacle in the hoistway 15.

  Further, one end of the hoisting machine lifting base 21 of the lifting mechanism 20 is rotatably attached to the hoisting machine mounting base 10a, and the other end is engaged with the lifting machine 16 fixed to the hoistway 15. Since the heavy hook 23 b is provided, the lifting mechanism 20 can be easily maintained in a horizontal state in the hoistway 15.

  Further, since the horizontal movement mechanism 30 includes the hoisting machine carriage 31 that is installed on the lifting mechanism 20 and holds the hoisting machine 10, the hoisting machine 10 is lifted by the lifting mechanism 20 and the hoisting machine mounting base 10a. When the height Q becomes the same level Q, the hoisting machine 10 can be reliably moved horizontally onto the hoisting machine mounting base 10a using the hoisting machine carriage 31.

Second Embodiment Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. 5 to 7 are views showing a second embodiment of the present invention.
Among these, FIG. 5 is a side view showing the configuration of the hoisting machine installation facility according to the second embodiment, and FIG. 6 is a top view of the hoisting machine installation facility of FIG. FIG. 7 is a side view showing a state where the hoisting machine is lifted by the lifting structure of the hoisting machine installation equipment shown in FIG.
In the second embodiment shown in FIG. 5 to FIG. 7, the same parts as those in the first embodiment shown in FIG. 1 to FIG.

  The hoisting machine installation equipment of 2nd Embodiment is arrange | positioned in the hoistway 15, as shown in FIG. 5, The lifting structure 40 which has the lifting hook 41, and the one end 40a (FIG. 5 is provided at the other end 40b (the left end in FIG. 5) of the lifting structure 40, and is attached to the lifting hook 41. And a horizontal movement mechanism 44 that horizontally moves the hoisting machine 10 on the hoisting machine mounting part 42.

  Further, the lifting hook 41 of the lifting structure 40 is engaged with the lifting machine 16 fixed to the hoistway 15, whereby the lifting structure 40 is supported in the hoistway 15.

Next, the structure of the lifting structure 40 will be described.
As shown in FIGS. 5 and 6, the lifting structure 40 includes a pair of steel pipe frame portions 40p and 40q and a connecting portion 40r that connects these frame portions 40p and 40q. Further, the lifting hook 41 is attached to the central portion of the lifting hook holding member 41a attached across the pair of frame portions 40p, 40q. For this reason, the lifting hook 41 is lifted by the lifting machine 16. The lifting structure 40 can be stably held by the lifting machine 16.

The hoisting machine mounting portion 42 is composed of a plate-like member provided at one end 40a of the lifting structure 40, and connects the pair of frame portions 40p, 40q of the lifting structure 40.
The pressing portion 43 is formed of a rod-like member provided at the other end 40b of the lifting structure 40, and connects the pair of frame portions 40p and 40q of the lifting structure 40.

  As shown in FIG. 5, a weight mounting table 46 for mounting a weight 46 a is provided in the vicinity of the pressing portion 43 of the other end 40 b of the lifting structure 40. The weight mounting table 46 is formed of a box-like member having an open top provided to connect the frame portions 40p and 40q of the lifting structure 40.

  In the lifting structure 40 shown in FIG. 5, the distance x between the lifting hook 41 and the center of the hoisting machine mounting portion 42 is smaller than the distance y between the lifting hook 41 and the pressing portion 43. ing. Preferably, the distance y is at least five times the distance x.

  The horizontal movement mechanism 44 has a hoisting machine cart 45 having the same configuration as the hoisting machine cart 31 in the first embodiment.

  Next, the operation of the present embodiment having such a configuration will be described.

  In installing the hoisting machine 10 on the hoisting machine mounting base 10a using the hoisting machine installation equipment, first, on the floor surface, the hoisting machine 10 lifts the structure 40 as shown in FIGS. It is placed and fixed on the upper machine placing part 42. Next, the weight 46 a is placed on the weight mounting table 46 of the lifting structure 40.

  Here, when the weight of the hoisting machine 10 is M and the distance between the lifting hook 41 and the center of the weight mounting table 46 is z, the weight m of the weight 46a is M × x ÷ z. The weight is preferably slightly smaller than the weight determined by the formula.

  Next, as shown in FIG. 5, the lifting hook 41 of the lifting structure 40 is lifted by the lifting machine 16 fixed to the hoistway 15.

  Then, when the lifting structure 40 is lifted to the lifting machine 16 by the lifting hook 41, the hoisting machine mounting part 42 moves upward by applying a force downward to the pressing part 43, As shown in FIG. 7, the hoisting machine mounting portion 42 reaches the same level Q as the hoisting machine mounting base 10a.

  As shown in FIG. 7, the hoisting machine 10 that is lifted by the lifting structure 40 and has the same level Q as the hoisting machine mounting base 10 a is taken up by the hoisting machine cart 45 of the horizontal movement mechanism 44. It is horizontally moved to the mounting table 10a side (to the right in FIG. 7) and installed right above the hoisting machine mounting table 10a.

  As described above, according to the present embodiment, when the hoisting machine 10 is installed, it is not necessary to use the space above and behind the hoisting machine mounting base 10a as a work space. For this reason, a work space required when installing the hoisting machine 10 can be reduced, and it is not interfered by an obstacle in the hoistway 15. Moreover, the moving posture of the lifting structure 40 in the lifting process of the hoisting machine 10 can be made somewhat free. Moreover, since the work using the lifting machine 16 is performed only once, the number of work processes can be reduced.

Moreover, since the weight mounting base 46 for mounting the weight 46a is provided in the vicinity of the pressing portion 43 of the other end 40b of the lifting structure 40, by placing the weight 46a on the weight mounting base 46, Since the weight of the hoisting machine 10 is offset, the magnitude of the force acting downward on the pressing portion 43 can be reduced.
In particular, when the weight of the hoisting machine 10 is M, the weight m of the weight 46a is slightly lower than the weight determined by the formula M × x ÷ z, thereby lowering the pressing portion 43. The force acting on the can be made very small.

Further, in the lifting structure 40, the distance x between the lifting hook 41 and the center of the hoisting machine mounting portion 42 is smaller than the distance y between the lifting hook 41 and the pressing portion 43. Therefore, the force acting downward on the pressing portion 43 can be made smaller than the weight M of the hoisting machine 10 by the moment of the force around the lifting hook 41.
In particular, by making the distance y 5 times larger than the distance x, the force that acts downward on the pressing portion 43 can be made smaller than one fifth of the weight M of the hoisting machine 10. it can.

Third Embodiment Hereinafter, a third embodiment of the present invention will be described with reference to the drawings. 8 and 9 are diagrams showing a third embodiment of the present invention.
8 is a side view showing the configuration of the hoisting machine installation equipment according to the third embodiment, and FIG. 9 shows a state where the hoisting machine is installed by the hoisting machine installation equipment of FIG. FIG.
In the third embodiment shown in FIGS. 8 and 9, the same parts as those in the first embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 8, the hoisting machine installation facility according to the third embodiment has a sliding rail 50 extending downwardly from the hoisting machine mounting base 10 a and a hoisting machine 10 fixed to the hoisting machine 50. A hoisting machine carrier 51 traveling on the hoisting machine 51 and connected to the hoisting machine carrier 51 via a tow rope 52a. The hoisting machine carrier 51 is made to travel on the slide rail 50 to be on the hoisting machine mounting base 10a. And a traction device 52 for traction.

Further, a bracket 14 is provided on the side surface of the hoisting machine mounting base 10 a, and the slide rail 50 is attached to the bracket 14. For this reason, the run rail 50 is fixed in the hoistway 15.
As shown in FIG. 8, the slide rail 50 includes a horizontal portion 50a extending from the hoisting machine mounting base 10a, and an inclined portion 50b connected to the horizontal portion 50a and inclined downward by about 45 degrees. The vertical portion 50c is connected to the inclined portion 50b and extends downward in the vertical direction. Further, the connecting portion between the horizontal portion 50a and the inclined portion 50b and the connecting portion between the inclined portion 50b and the vertical portion 50c are each smoothly curved.

  The hoisting machine carrier 51 can fix the hoisting machine 10 with bolts. At the end of the hoisting machine carrier 51, a tow hook 51a for hanging a tow rope 52a is provided.

  As shown in FIG. 8, the traction device 52 is attached to the lower part of the wall surface 15a on the back side of the hoistway 15 behind the hoisting machine mounting base 10a (right side in FIG. 8). Between the traction device 52 and the hoisting machine carrier 51, a traction rope 52a is provided via a pulley 15b attached to the wall surface 15a of the hoistway 15.

  Next, the operation of the present embodiment having such a configuration will be described.

  In installing the hoisting machine 10 on the hoisting machine mounting base 10a using the hoisting machine installation equipment, the hoisting machine 10 prepared on the floor surface is first lifted by a hoisting machine (not shown), as shown in FIG. Next, it is placed on a hoisting machine carrier 51 on the vertical portion 50c of the slide rail 50 and fixed by bolts.

  When the hoisting machine carriage 51 is placed on the vertical portion 50 c of the slide rail 50, the pulling device 52 pulls the tow rope 52 a, so that the hoisting machine carriage 51 passes through the inclined portion 50 b of the skid rail 50. It automatically travels to the horizontal portion 50a. Then, as shown in FIG. 9, the hoisting machine carrier 51 moves to the position just above the hoisting machine mounting base 10a, and the operator installs the hoisting machine 10 on the hoisting machine mounting base 10a.

  As described above, according to this embodiment, when the hoisting machine 10 is installed, it is not necessary to use the space above the hoisting machine mounting base 10a as a work space. For this reason, a work space required when installing the hoisting machine 10 can be reduced, and it is not interfered by an obstacle in the hoistway 15. In addition, the hoisting machine 10 can be automatically moved onto the hoisting machine mounting base 10a by using the traction device 52, and the work by the worker is the final position of the hoisting machine 10 with respect to the hoisting machine mounting base 10a. Since only the adjustment is performed, the burden on the worker can be reduced.

The side view which shows the structure of the winding machine installation equipment by 1st Embodiment Front view of the hoist installation equipment shown in FIG. Top view of the hoist installation equipment shown in FIG. The side view which shows the state which the hoisting machine was lifted by the lifting mechanism of the hoisting machine installation equipment of FIG. Side view showing the configuration of the hoist installation equipment according to the second embodiment Top view of the hoist installation equipment shown in FIG. The side view which shows the state which the hoisting machine was lifted by the lifting structure of the hoisting machine installation equipment of FIG. Side view showing the configuration of the hoist installation equipment according to the third embodiment Side view showing a state where the hoisting machine is installed by the hoisting machine installation equipment of FIG. Side view showing an example of the configuration of a conventional hoist installation equipment

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Hoisting machine 10a Hoisting machine installation base 11 Bracket 11a Hook 11b Detachment stop 12 Pulley base 12a Pulley 13 Bolt 14 Bracket 15 Hoistway 15a Wall 15b Pulley 16 Lifting machine 17 Bolt 20 Lifting mechanism 21 Hoisting machine lifting base 21a Shoe 22 Jack 23 Hoisting machine mounting base 23a Round bar 23b Lifting hook 23c Long hole 30 Horizontal movement mechanism 31 Hoisting machine cart 40 Lifting structure 40a One end 40b The other end 40p, 40q Framework part 40r Connection part 41 Lifting hook 41a Lifting Heavy hook holding material 42 Hoisting machine mounting part 43 Pressing part 44 Horizontal movement mechanism 45 Hoisting machine cart 46 Weight mounting base 46a Weight 50 Sliding rail 50a Horizontal part 50b Inclined part 50c Vertical part 51 Hoisting machine carrier 51a Towing hook 52 Towing device 52a Towing rope 80 Hoisting machine 80a Hoisting machine With base 81 pulley 82 pulling device 82a tow rope 83 hoist carriage 84 guide rail 85 hoistway

Claims (3)

In the hoisting machine installation equipment for installing the hoisting machine on the hoisting machine installation base fixed near the top of the elevator hoistway,
A lifting structure having a lifting hook with which a lifting machine fixed to the hoistway engages;
A hoisting machine mounting portion provided at an upper portion of the lifting structure at one end of the lifting structure, and mounting and fixing the hoisting machine on an upper surface ;
A pressing portion that is provided at the other end of the lifting structure and is located on the opposite side of the hoisting machine mounting portion with respect to the lifting hook;
A horizontal movement mechanism that horizontally moves the hoisting machine on the hoisting machine placement unit,
In the lifting structure, the hoisting machine mounting portion is provided at a position above the lifting hook,
When the lifting structure is lifted by the lifting machine at the lifting hook, a force is applied downward to the pressing unit, so that the hoisting machine mounting unit moves upward, and the winding unit is moved upward. The upper machine mounting part reaches the same level as the hoisting machine mounting base, and the hoisting machine on the hoisting machine mounting part is horizontally moved to the hoisting machine mounting base side by the horizontal movement mechanism. Winding machine installation equipment characterized by that. The hoist installation equipment according to claim 1 , wherein a weight mounting table for mounting a weight is provided in the vicinity of the pressing portion at the other end of the lifting structure. Claimed in the lifting structure, the distance between the lifting hook and the hoist-carrying part, characterized in that is smaller than the distance between the lifting hook and the pressing portion Item 1 or 2 hoist installation equipment.

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