JP7708630B2 - Threshold positioning device and threshold installation method - Google Patents

Description

The present invention relates to a threshold positioning device and a threshold installation method.

In developed countries, including Japan, North America, and Europe, the decline in the number of construction workers due to the declining birthrate and aging population has become a problem. The elevator installation industry is no exception to this problem. For this reason, there is a demand for more efficient and labor-saving construction work so that the same number of construction jobs can be handled even with a decrease in the number of workers.

Elevator installation involves a wide variety of tasks, including measuring inside the tower, installing the rails, installing the entrances and exits, installing equipment inside the tower, and assembling the car. Among these installation tasks, entrance and exit installation involves sealing the opening of the elevator shaft formed in the building. For this reason, considering the safety of the construction work, it is desirable to complete the entrance and exit installation as quickly as possible. However, entrance and exit installation is a task that is repeated on each floor of the building, and it requires the handling of long materials and heavy objects, so it is labor-intensive and time-consuming.

An elevator entrance is primarily made up of a sill, jamb, and door pocket. The sill is the component that forms the foundation of the entrance. Threshold installation requires precise adjustment of the sill position in each of the six degrees of freedom, such as ensuring a consistent gap between the car ascending and descending in the elevator shaft and the sill of each floor, and installing the sill horizontally to allow the elevator hall door to move smoothly. Here, the six degrees of freedom refer to the six directions: X-axis, Y-axis, Z-axis, pitch, roll, and yaw.

When adjusting the position of a threshold with precision during installation work, it is possible to use a device or tool that helps to improve the efficiency of the adjustment work and reduce the labor required. Patent Document 1 describes technology related to an elevator hall threshold adjustment tool and threshold adjustment method. The technology described in Patent Document 1 aims to provide an elevator hall threshold adjustment tool and threshold adjustment method that enable adjustment of the longitudinal direction and elevation angle of the threshold of an elevator hall. In response to this problem, Patent Document 1 describes the configuration of an elevator hall threshold adjustment tool that is fixed to the side of the threshold and has notches formed in each of the upper and lower adjustment pieces, and is characterized in that it adjusts the horizontal direction of the threshold and the elevation angle of the boarding surface based on the positional relationship between a centering line hanging from the top of the elevator hoistway and the notches in the upper and lower adjustment pieces.

JP 2014-28672 A

In conventional threshold position adjustment work, the threshold is temporarily fixed on a bracket that is fixed in advance to the wall inside the hoistway, and the worker adjusts the posture and position of the threshold by striking the bracket or threshold with a hammer using a piano wire for centering or a level that is hung vertically from the top of the hoistway as a reference. However, with this method, the direction, angle, and amount of movement of the threshold change depending on the degree to which the threshold is temporarily fixed, the hammer striking position, striking angle, and striking force. This makes it difficult for the worker to adjust the position of the threshold as intended, and requires skilled techniques and know-how. Another issue is that inexperienced workers have to strike the threshold with the hammer many times before they can finish adjusting the threshold position, which takes a long time.

Regarding this issue, the elevator hall threshold adjustment jig described in Patent Document 1 is merely an indicator plate that makes it easy to visually check the positional relationship between the piano wire, which is the core wire hanging from the top of the elevator shaft, and the notches in the upper and lower adjustment pieces of the threshold adjustment jig. For this reason, even when using the elevator hall threshold adjustment jig described in Patent Document 1, skilled techniques are required to adjust the position of the threshold.

The objective of the present invention is to provide a technology that makes it easier to adjust the position of the threshold than ever before.

In order to solve the above problems, for example, the configurations described in the claims are adopted.
The present application includes multiple means for solving the above problems, one of which is a threshold positioning device for positioning a threshold installed at an opening of an elevator hoistway. This threshold positioning device is equipped with a pair of adjustment mechanisms having a support arm for supporting the threshold in a placed state, a height adjustment unit for adjusting the height of the support arm, and an inclination adjustment unit for adjusting the inclination of the support arm with respect to the depth direction of the opening. The pair of adjustment mechanisms are configured to be installed side by side in the width direction of the opening.

According to the present invention, the position adjustment of the threshold can be performed more easily than in the past.
Problems, configurations and effects other than those described above will become apparent from the following description of the embodiments.

FIG. 13 is a perspective view showing the state in which a threshold is installed at the opening of the elevator shaft. FIG. 13 is a perspective view showing the arrangement of the threshold and the bracket. FIG. 4 is an enlarged view showing the configuration of the bracket. FIG. 1 is a perspective view showing the overall configuration of a threshold positioning device according to a first embodiment; FIG. 4 is a perspective view showing a configuration of an adjustment mechanism. FIG. 4 is a side view showing the configuration of the adjustment mechanism. 11A and 11B are diagrams illustrating a mechanism for adjusting the tilt of a support arm by a tilt adjustment unit. 13 is a view showing the state in which the sill is supported by the support arm of the adjustment mechanism, as viewed diagonally from above. 13 is a view showing the state in which the sill is supported by the support arm of the adjustment mechanism, as viewed diagonally from below. FIG. 2 is a perspective view showing a configuration of a control unit. FIG. 4 is a perspective view showing a configuration of a reference center index member. 1 is a schematic diagram showing a system configuration of a threshold positioning device according to a first embodiment. FIG. FIG. 13 is a diagram showing a control loop when a manual control mode is applied. FIG. 13 is a diagram showing a control loop when the automatic level control mode is applied. 4 is a flowchart for explaining a threshold installation method using the threshold positioning device according to the first embodiment. This is a view of the opening before the threshold is installed, as seen from the landing side. 1 is a perspective view of the threshold positioning device seen from the elevator shaft side before the threshold is supported by the support arm. 13 is a perspective view showing the state in which the support arm is pulled out toward the elevator shaft in order to place the threshold on the support arm. FIG. 13 is a view of the threshold positioning device according to the second embodiment as seen from the elevator shaft side. FIG. 11 is a schematic diagram showing the system configuration of a threshold positioning device according to a second embodiment. FIG.

Embodiments of the present invention will be described in detail below with reference to the drawings. In this specification and the drawings, elements having substantially the same functions or configurations are given the same reference numerals, and duplicate descriptions will be omitted.

First, the coordinate system used in this specification and the drawings will be explained with reference to FIG.
As shown in FIG. 1, an opening 4 is formed in the elevator hoistway 6. The opening 4 is an opening for forming an elevator entrance. The opening 4 is formed in a rectangular shape. On this premise, the X-axis direction indicates the depth direction of the opening 4, the Y-axis direction indicates the width direction of the opening 4, and the Z-axis direction indicates the height direction of the opening 4. The depth direction of the opening 4 corresponds to the depth direction (front-back direction) when a person stands on the building floor 5 that is the elevator landing and looks at the hoistway 6, that is, the direction in which people and luggage enter and exit. The width direction of the opening 4 corresponds to the direction in which the elevator landing door opens and closes (left-right direction). In addition, the roll direction indicates the rotation direction around the X-axis, the pitch direction indicates the rotation direction around the Y-axis, and the yaw direction indicates the rotation direction around the Z-axis. The X-axis direction and the Y-axis direction correspond to two horizontal axis directions that are two axes parallel to the horizontal plane, and the Z-axis direction corresponds to the vertical direction that is perpendicular to the horizontal plane. The definition of the coordinate system described using FIG. 1 is also applied to drawings other than FIG. 1.

Next, the installation state and configuration of the threshold will be described with reference to Figs.
As shown in FIG. 1, the threshold 1 is installed in the opening 4 using a plurality of brackets 2. The opening 4 is formed for each floor of the building. Opening side parts 7 are located on the left and right sides of the opening 4. The elevator shaft 6 is formed on the back side of the opening 4 as seen by a person standing on the building floor 5. Two reference cores 3 are arranged in the elevator shaft 6. Each reference core 3 is arranged near a wall surface 11 of the elevator shaft 6 to indicate a reference position when positioning the threshold 1. A thin wire such as a piano wire having a diameter of about 0.5 mm is used for the reference core 3. The two reference cores 3 are suspended vertically from the top to the bottom of the elevator shaft 6. The distance between the two reference cores 3 in the Y-axis direction is set to a predetermined distance.

Fig. 2 is a perspective view showing the arrangement of the threshold and the bracket, Fig. 3 is an enlarged view showing the configuration of the bracket, and Fig. 4 is a top view showing the configuration of the threshold.
As shown in Fig. 2, the threshold 1 is fixed to a wall surface 11 (see Fig. 1) of the hoistway 6 or a steel frame (not shown) by using a plurality of brackets 2. In this embodiment, as an example, the threshold 1 is fixed to the wall surface 11 of the hoistway 6 by using three brackets 2.

The brackets 2 are arranged at three locations at a predetermined interval in the width direction of the opening 4. The brackets 2 are composed of two bracket parts, a wall bracket 2a and a threshold bracket 2b. The wall bracket 2a is fixed to the wall surface 11 of the elevator 6, and the threshold bracket 2b is fixed to the threshold 1. The wall bracket 2a is formed in an L shape, and the threshold bracket 2b is also formed in an L shape. The wall bracket 2a and the threshold bracket 2b are fastened to each other by two fasteners 12 with one piece overlapping the other.

The fastener 12 is, for example, a bolt, a nut, and a washer. As shown in FIG. 3, the threshold bracket 2b has two long holes 17. The long holes 17 are formed vertically. Also, as shown in FIG. 10, the threshold bracket 2b has a fixing hole 23. The fixing hole 23 is a hole for fixing the threshold bracket 2b of the bracket 2 to the underside of the threshold 1 using a fastener 24. On the other hand, as shown in FIG. 2, the wall bracket 2a has three long holes 21 and three fixing holes 22. The long holes 21 and the fixing holes 22 are both formed horizontally. The long holes 21 are holes for fastening the wall bracket 2a and the threshold bracket 2b. The fixing holes 22 are holes for fixing the wall bracket 2a to the wall surface 11 of the elevator 6. Of the three long holes 21, the upper and lower two long holes 21 are arranged so as to overlap with the corresponding long holes 17. The shaft of the fastener 12 is attached so that it passes through the long hole 17 and the long hole 21. The relative attachment position of the wall-side bracket 2a and the threshold-side bracket 2b can be adjusted in both the longitudinal direction of the long hole 17 and the longitudinal direction of the long hole 21.

The threshold 1 is a long member. As shown in FIG. 4, the threshold 1 has two guide grooves 18 and multiple dust holes 14. The two guide grooves 18 are formed parallel to each other along the longitudinal direction of the threshold 1. The guide grooves 18 are grooves that guide the movement of a landing door (not shown) that opens and closes the elevator entrance. The dust holes 14 are provided at multiple locations in each guide groove 18. The dust holes 14 are holes for dropping dust that has entered the guide grooves 18.

Two opening marking lines 13 are drawn on the top surface of the threshold 1. The opening marking lines 13 are used to adjust the position of the threshold 1 in a horizontal plane parallel to the X-axis and Y-axis directions. Specifically, the position of the threshold 1 is adjusted so that the reference core 3 is located on the extension line of each opening marking line 13. For this reason, the distance between the two opening marking lines 13 in the longitudinal direction of the threshold 1 is set to match the distance between the two reference cores 3 described above.

First Embodiment
(Configuration of threshold positioning device)
Next, the configuration of the threshold positioning device according to the first embodiment will be described.
FIG. 5 is a perspective view showing the overall configuration of the threshold positioning device according to the first embodiment.
As shown in FIG. 5 , the threshold positioning device 100 mainly includes a pair of adjustment mechanisms 101 and a control unit 120 .

The pair of adjustment mechanisms 101 are mechanisms for adjusting the installation position of the threshold 1. The pair of adjustment mechanisms 101 are configured so that they can be installed side by side in the width direction of the opening 4. The pair of adjustment mechanisms 101 are attached to the opening side portions 7 located on the left and right of the opening 4. The pair of adjustment mechanisms 101 are symmetrical when viewed from the X-axis direction, but are basically configured the same. The configuration of the adjustment mechanisms 101 will be described in detail below.

(adjustment mechanism)
FIG. 6 is a perspective view showing the configuration of the adjustment mechanism, and FIG. 7 is a side view showing the configuration of the adjustment mechanism.
As shown in FIGS. 6 and 7, the adjustment mechanism 101 includes a support arm 102, a height adjustment unit 103, a front-rear tilt adjustment unit 104, a base plate 105, and a horizontal position adjustment unit 106.

(Support arm)
The support arm 102 is a member that supports the threshold 1 in a placed state. The support arm 102 has a first arm portion 102a, a second arm portion 102b, and a third arm portion 102c integrally. The first arm portion 102a and the second arm portion 102b are disposed at right angles to each other. The first arm portion 102a and the third arm portion 102c are disposed parallel to each other. The second arm portion 102b connects one end of the first arm portion 102a to one end of the third arm portion 102c. The first arm portion 102a is formed longer than the third arm portion 102c. The third arm portion 102c corresponds to the arm portion on which the threshold 1 is placed when the threshold 1 is supported by the support arm 102.

The first arm portion 102a has an arm fixing long hole 117, and the third arm portion 102c has a threshold fixing long hole 118. The arm fixing long hole 117 is a hole for fixing the support arm 102 to the arm support plate 150. The threshold fixing long hole 118 is a hole for fixing the threshold 1 to the third arm portion 102c. The arm fixing long hole 117 is formed long in the longitudinal direction of the first arm portion 102a, and the threshold fixing long hole 118 is formed long in the longitudinal direction of the third arm portion 102c.

The support arm 102 is attached to the arm support plate 150 by the arm position adjustment knob 116. The arm support plate 150 is an L-shaped plate having an arm receiving portion 150a. The arm receiving portion 150a is a portion that receives and supports the first arm portion 102a of the support arm 102 from below. A screw hole (not shown) is formed in the arm receiving portion 150a, and a male screw (not shown) that engages with the screw hole of the arm receiving portion 150a is formed in the arm position adjustment knob 116. The male screw of the arm position adjustment knob 116 engages with the screw hole of the arm receiving portion 150a through the arm fixing long hole 117 of the support arm 102. Therefore, when the arm position adjustment knob 116 is tightened, the first arm portion 102a is fixed to the arm receiving portion 150a. In other words, the support arm 102 can be fixed to the arm support plate 150 by tightening the arm position adjustment knob 116. Furthermore, when the arm position adjustment knob 116 is loosened, the first arm portion 102a can be moved in the long axis direction of the arm fixing long hole 117. In other words, the position of the support arm 102 in the X-axis direction can be adjusted by loosening the arm position adjustment knob 116. For this reason, the arm position adjustment mechanism that adjusts the position of the support arm 102 in the depth direction of the opening 4 is composed of the arm fixing long hole 117, the arm support plate 150, and the arm position adjustment knob 116.

(Height adjustment part)
The height adjustment unit 103 is a part that adjusts the height of the support arm 102. The height adjustment unit 103 mainly includes an actuator 107, a sliding stage 108, an actuator power supply 113, a back plate 114, and a pair of guide shafts 115. In this embodiment, as an example, the actuator 107 is configured by an electric linear actuator. The actuator 107 has a rod portion 107a, a case portion 107b, and a motor portion 107c.

The rod portion 107a expands and contracts in response to the drive of the motor portion 107c. The motor portion 107c is connected to the upper plate 152 via a joint member 151. The actuator power supply 113 is attached to the upper plate 152. The motor portion 107c is electrically connected to the actuator power supply 113 via wiring (not shown), and power is supplied from the actuator power supply 113 to the motor portion 107c via the wiring. The case portion 107b has a built-in mechanism for transmitting the driving force of the motor portion 107c to the rod portion 107a. The tip (lower end) of the rod portion 107a is connected to the sliding stage 108 via a joint member 153. The case portion 107b is fixed to the intermediate plate 156 using a band 154 and a bolt 155. The intermediate plate 156 is fixed to the back plate 114 using a bolt (not shown).

The back plate 114 is a vertically long plate. Support legs 111 are attached to the back plate 114. The support legs 111 are attached to the back plate 114 using support leg attachments 161. The support legs 111 are movable in the vertical direction, which is the longitudinal direction of the back plate 114. The support legs 111 are used to stabilize the posture of the adjustment mechanism 101 by placing the weight of the threshold positioning device 100 on the support legs 111 when it is desired to attach the base plate 105 to the opening side portion 7 without contacting the building floor 5 and floating it above the building floor 5.

When the support legs 111 are used, the lower ends of the support legs 111 come into contact with the building floor 5. In other words, the support legs 111 are installed so as to be in contact with the building floor 5. This allows the base plate 105 to be tightly attached to the opening side 7 while the entire adjustment mechanism 101 is supported by the support legs 111, and the base plate 105 can be fixed to the opening side 7 by the clamps 8.

The support legs 111 may be attached to the base plate 105 instead of the back plate 114. Also, if the lower end of the base plate 105 is in contact with the building floor 5, the support legs 111 do not need to be used. If the support legs 111 are not used, there is no need to attach the support legs 111 to the back plate 114 or the like. In other words, the support legs 111 may be provided as needed.

The upper end of the back plate 114 is connected to the upper plate 152, and the lower end of the back plate 114 is connected to the lower plate 157. The upper plate 152 and the lower plate 157 are arranged facing each other. The pair of guide shafts 115 are arranged parallel to each other and connect the upper plate 152 and the lower plate 157. The pair of guide shafts 115 are shafts that guide the movement of the sliding stage 108.

In the height adjustment unit 103 configured as described above, when the rod portion 107a expands and contracts in accordance with the drive of the motor portion 107c, the sliding stage 108 moves in the height direction (Z-axis direction) while being guided by the guide shaft 115. In addition, the rotation axis 109 and the arm support plate 150 are connected to the sliding stage 108. Therefore, when the sliding stage 108 is moved by the drive of the actuator 107 with the support arm 102 attached to the arm support plate 150, the support arm 102 moves together with the sliding stage 108. In this way, the height adjustment unit 103 can adjust the height of the support arm 102 by the drive of the actuator 107.

(Fore/aft inclination adjustment part)
The front-rear tilt adjustment unit 104 corresponds to an inclination adjustment unit that adjusts the inclination of the support arm 102 with respect to the depth direction of the opening 4. The inclination of the support arm 102 with respect to the depth direction of the opening 4 is the inclination of the support arm 102 around the Y axis, in other words, the inclination of the support arm 102 in the pitch direction. The front-rear tilt adjustment unit 104 is attached to a sliding stage 108. The front-rear tilt adjustment unit 104 includes a rotation shaft 109, an arm support plate 150, a pair of front-rear tilt adjustment knobs 110, and a knob support plate 159. The rotation shaft 109 is an axis parallel to the Y axis direction. The rotation shaft 109 is attached to the sliding stage 108. The arm support plate 150 is rotatably supported by the rotation shaft 109. The pair of front-rear tilt adjustment knobs 110 are attached to a knob support plate 159. Each of the front-rear tilt adjustment knobs 110 has a protruding portion 110a that protrudes upward from the knob support plate 159. The upper end of the protruding portion 110a is abutted from below against an arm receiving portion 150a of the arm support plate 150. When the front-rear tilt adjustment knob 110 is rotated, the protruding dimension of the protruding portion 110a changes according to the amount and direction of rotation.

In the front-rear tilt adjustment unit 104 configured as described above, when the pair of front-rear tilt adjustment knobs 110 are rotated appropriately, the arm support plate 150 rotates around the rotation axis 109 (fulcrum). For this reason, for example, as shown in FIG. 8, when the pair of front-rear tilt adjustment knobs 110 are rotated so that the protruding portion 110a of the left front-rear tilt adjustment knob 110 pushes up the arm receiving portion 150a of the arm support plate 150, the arm support plate 150 rotates clockwise. Also, although not shown, when the pair of front-rear tilt adjustment knobs 110 are rotated so that the protruding portion 110a of the right front-rear tilt adjustment knob 110 pushes up the arm receiving portion 150a of the arm support plate 150, the arm support plate 150 rotates counterclockwise. Therefore, with the support arm 102 attached to the arm support plate 150 using the arm position adjustment knob 116, the inclination of the support arm 102 relative to the depth direction (X-axis direction) of the opening 4 can be adjusted by appropriately rotating the pair of front-rear tilt adjustment knobs 110.

(Base plate)
The base plate 105 corresponds to a base member fixed to the opening side portion 7. The base plate 105 is composed of a vertically long L-shaped plate. The base plate 105 is attached in a state of being in close contact with the opening side portion 7. Specifically, the base plate 105 is attached to the opening side portion 7 by clamping the base plate 105 and the opening side portion 7 with the clamp 8 in a state in which the base plate 105 is pressed against the opening side portion 7 so that the inner surface 105a (see FIG. 6 ) of the base plate 105 is in close contact with the corner portion of the opening side portion 7 on the side of the elevator shaft 6. In this way, the base plate 105 is attached vertically along the opening side portion 7.

(Horizontal position adjustment part)
The horizontal position adjustment unit 106 corresponds to an arm position adjustment unit that adjusts the position of the support arm 102 in the width direction of the opening 4 (hereinafter also referred to as the "horizontal position"). The main purpose of adjusting the position of the support arm 102 in the width direction of the opening 4 is to align the position of the threshold fixing long hole 118 of the support arm 102 with the position of the dust drop hole 14 provided in the threshold 1. The position of the dust drop hole 14 in the longitudinal direction of the threshold 1 may differ depending on the type and model number of the threshold 1. Therefore, even when handling thresholds 1 of different types and model numbers, it is possible to use a common adjustment mechanism 101 by appropriately adjusting the position of the support arm 102 with the horizontal position adjustment unit 106. However, the position adjustment of the support arm 102 in the width direction of the opening 4 may be performed for purposes other than those described above.

The horizontal position adjustment units 106 are arranged in pairs, one above the other. The upper horizontal position adjustment unit 106 is attached to the upper plate 152, and the lower horizontal position adjustment unit 106 is attached to the lower plate 157. The upper and lower horizontal position adjustment units 106 are symmetrical when viewed from the Y-axis direction, but are basically configured the same. The configuration of the horizontal position adjustment units 106 is described in detail below.

The horizontal position adjustment unit 106 includes a horizontal position adjustment knob 99, a horizontal shaft 112, and a movable member 163. The horizontal position adjustment knob 99 is a knob for adjusting the horizontal position of the support arm 102. The base end of the horizontal shaft 112 is fixed to the base plate 105. The horizontal shaft 112 extends in a direction perpendicular to the longitudinal direction of the base plate 105. The horizontal shaft 112 is a shaft that guides the movement of the movable member 163. A retaining member 164 is attached to the tip of the horizontal shaft 112. The retaining member 164 is a member that limits the movement range of the movable member 163 so that the movable member 163 does not come off the horizontal shaft 112. A C-ring can be used as the retaining member 164.

The movable member 163 is a member that is fitted to the horizontal shaft 112 and moves along the horizontal shaft 112. The upper movable member 163 is fixed to the upper plate 152 by two screws 165, and the lower movable member 163 is also fixed to the lower plate 157 by two screws 165. The movable member 163 has a slot 163a. The horizontal position adjustment knob 99 is attached to the slot 163a of the movable member 163. The horizontal position adjustment knob 99 has a male thread (not shown), and the movable member 163 has a female thread (not shown). The horizontal position adjustment knob 99 can tighten or loosen the horizontal shaft 112 by the engagement of the male thread and female thread described above.

In the pair of upper and lower horizontal position adjustment parts 106 configured as described above, the movable member 163 can be moved along the horizontal shaft 112 by loosening the horizontal position adjustment knobs 99. This allows the back plate 114, upper plate 152, lower plate 157, height adjustment part 103, front-rear tilt adjustment part 104, etc. to be moved integrally with the upper and lower movable members 163. This allows the horizontal position of the support arm 102 to be adjusted. In addition, the horizontal position of the support arm 102 can be fixed by tightening the horizontal position adjustment knobs 99.

Here, a method for temporarily fixing the sill 1 and the support arm 102 will be described with reference to FIGS.
FIG. 9 is a view from diagonally above showing the state in which the threshold is supported by the support arms of the adjustment mechanism, and FIG. 10 is a view from diagonally below showing the state in which the threshold is supported by the support arms of the adjustment mechanism.
As shown in Fig. 9 and Fig. 10, the threshold 1 is placed on the upper surface of the third arm portion 102c of the support arm 102. The threshold 1 is temporarily fixed to the support arm 102 by a temporary threshold fixing device 119. Temporarily fixing the threshold 1 means fixing the threshold 1 to the support arm 102 before fixing (full fixing) the threshold 1 to the wall surface 11 or steel frame of the elevator shaft 6 using a plurality of brackets 2 as shown in Fig. 1. The temporary threshold fixing device 119 corresponds to a fixing device that fixes the threshold 1 to the third arm portion 102c of the support arm 102 through the dust drop hole 14 and the long threshold fixing hole 118. The temporary threshold fixing device 119 temporarily fixes the threshold 1 to the support arm 102 by tightening the temporary threshold fixing device 119 so as to sandwich the threshold 1 and the third arm portion 102c from above and below. The screw shaft (not shown) of the threshold temporary fastener 119 is passed through the dust drop hole 14 of the threshold 1 and the threshold fixing long hole 118 of the third arm portion 102c. The dust drop hole 14 is a long hole whose major axis direction is the longitudinal direction of the threshold 1, and the threshold fixing long hole 118 is a long hole whose major axis direction is along the short direction of the threshold 1. Therefore, when the threshold 1 is placed on the third arm portion 102c without fastening the threshold temporary fastener 119, the threshold 1 can be freely moved in the X-axis direction and the Y-axis direction within the dimensional range of the dust drop hole 14 and the threshold fixing long hole 118, which are respectively long holes.

(Control Unit)
FIG. 11 is a perspective view showing the configuration of the control unit.
As shown in FIG. 11, the control unit 120 is a unit that can be attached to and detached from the threshold 1. The control unit 120 includes a control board 121, an operation unit 122, an inclination sensor 123, a control power supply 124, a unit base 125, and a height indicator plate 127. The unit base 125 is a plate-like member that serves as the base of the control unit 120, and is formed in a U-shape when viewed from the Y-axis direction. The control board 121, the operation unit 122, the inclination sensor 123, the control power supply 124, and the height indicator plate 127 are attached on the unit base 125. The unit base 125 is attached by covering the threshold 1 from above. In addition, a set screw 126 is attached to the unit base 125, and the unit base 125 is fixed to the threshold 1 by tightening the set screw 126. In addition, the control unit 120 can be removed from the threshold 1 by loosening the set screw 126.

The control board 121 is a circuit board for controlling the driving of the actuator 107 provided in the pair of adjustment mechanisms 101 described above. Various electronic components are mounted on the control board 121, including a computing element such as a CPU that functions as a control unit 121a (see FIG. 13), connectors for inputting and outputting various signals, and a connector for power supply. The control board 121 is attached to the unit base 125 via a plurality of board support rods 167. The control board 121 is also electrically connected to the control power supply 124 via power supply wiring (not shown). The control board 121 is also electrically connected to the operation unit 122, the tilt sensor 123, and the actuator 107 via signal wiring (not shown).

The operating unit 122 is for operating the actuator 107 of the height adjustment unit 103, and has three operating knobs 128a, 128b, and 128c. The operating unit 122 also has an upper panel 168a and a lower panel 168b. The upper panel 168a and the lower panel 168b are arranged facing each other via a substrate 169. A gap is provided between the upper panel 168a and the substrate 169 by an upper spacer 171, and a gap is provided between the lower panel 168b and the substrate 169 by a lower spacer 172. The lower panel 168b is attached to the upper surface of the unit base 125.

The operation knob 128a is a knob for operating the actuator 107 of the adjustment mechanism 101 located on the left side when the opening 4 is viewed from the elevator 6 side. The operation knob 128a is provided so as to be rotatable in both directions. When an operator rotates the operation knob 128a, an operation signal according to the direction and amount of rotation of the operation knob 128a is sent from the operation knob 128a to the control unit 121a. The control unit 121a controls the actuator 107 of the left adjustment mechanism 101 based on the operation signal from the operation knob 128a. Specifically, the control unit 121a transmits a drive signal based on the operation signal received from the operation knob 128a to the actuator 107 of the left adjustment mechanism 101. As a result, the rod portion 107a of the actuator 107 of the left adjustment mechanism 101 moves forward and backward according to the drive signal sent from the control unit 121a.

The operation knob 128b is a knob for switching the control mode for controlling the operation of the pair of adjustment mechanisms 101. The control mode will be described later. The operation knob 128b is provided so as to be rotatable in both directions. When the operator rotates the operation knob 128b in a first direction (for example, clockwise), a first mode switching signal is sent from the operation knob 128b to the control unit 121a, and the control unit 121a switches the control mode to the automatic level control mode in accordance with the first mode switching signal. When the operator rotates the operation knob 128b in a second direction (for example, counterclockwise), a second mode switching signal is sent from the operation knob 128b to the control unit 121a, and the control unit 121a switches the control mode to the manual control mode in accordance with the second mode switching signal.

The operation knob 128c is a knob for operating the actuator 107 of the adjustment mechanism 101 located on the right side when the opening 4 is viewed from the elevator shaft 6 side. The operation knob 128c is provided so as to be rotatable in both directions. When an operator rotates the operation knob 128c, an operation signal according to the rotation direction and rotation amount of the operation knob 128c is sent from the operation knob 128c to the control unit 121a. The control unit 121a controls the actuator 107 of the right adjustment mechanism 101 based on the operation signal from the operation knob 128c. Specifically, the control unit 121a transmits a drive signal based on the operation signal received from the operation knob 128c to the actuator 107 of the right adjustment mechanism 101. As a result, the rod portion 107a of the actuator 107 of the right adjustment mechanism 101 moves forward and backward according to the drive signal transmitted from the control unit 121a.
The order and arrangement of the operation knobs 128a, 128b, and 128c are not limited to the example shown in FIG. 11, and can be changed as necessary.

The inclination sensor 123 corresponds to an inclination detection unit that detects the inclination of the threshold 1 with respect to the width direction of the opening 4. The inclination of the threshold 1 with respect to the width direction of the opening 4 is the inclination of the threshold 1 around the X-axis, in other words, the inclination of the threshold 1 in the roll direction. The inclination sensor 123 is a sensor that can detect the inclination angle of the threshold 1 in the roll direction. The inclination angle of the threshold 1 in the roll direction is zero when the upper surface of the threshold 1 is parallel to the horizontal plane. The inclination sensor 123 is attached to the upper surface of the substrate 169. When the control unit 120 is attached to the threshold 1, the upper surface of the substrate 169 is arranged parallel to the upper surface of the threshold 1. The inclination sensor 123 is, for example, composed of a three-axis acceleration sensor. The detection result of the inclination sensor 123 is sent to the control unit 121a. The detection result of the inclination sensor 123 is sent from the inclination sensor 123 to the control unit 121a as an inclination detection signal indicating the inclination angle of the threshold 1 in the roll direction.

The control power supply 124 supplies power to the electronic components mounted on the control board 121, and also supplies power to the operation unit 122 and the tilt sensor 123 via the control board 121.

The height indicator plate 127 is a member that serves as an indicator when adjusting the height of the threshold 1. The height indicator plate 127 is attached to the unit base 125 using an L-shaped plate 175 and a receiving member 176. The L-shaped plate 175 is attached to the upper surface of the unit base 125. The height indicator plate 127 is attached to the L-shaped plate 175 in a state where it stands vertically from the upper surface of the unit base 125. The height indicator plate 127 is marked with a scale (not shown) so that the height dimension can be visually confirmed with the upper surface of the threshold 1 as the reference (zero) when the control unit 120 is attached to the threshold 1. This scale is marked on the main surface of the height indicator plate 127. The main surface of the height indicator plate 127 is the surface onto which the horizontal laser line 10 (see FIG. 17) emitted from the laser marking device 9 is irradiated.

The height indicator plate 127 is capable of measuring the distance from the upper surface of the threshold 1 supported by the support arm 102 to the horizontal laser line 10. The laser marking device 9 and the height indicator plate 127 constitute a height detection device that detects the installation height of the threshold 1. The receiving member 176 is a member that receives and supports the lower end of the height indicator plate 127. A position adjustment knob 177 is attached to the mounting portion of the height indicator plate 127. The position adjustment knob 177 is a knob for adjusting the position of the height indicator plate 127 in the Z-axis direction. By providing this position adjustment knob 177, the position of the height indicator plate 127 can be adjusted so that the horizontal laser line 10 emitted from the laser marking device 9 is irradiated onto the height indicator plate 127. The height indicator plate 127 can also be attached to the threshold 1 separately from the control unit 120.

FIG. 12 is a perspective view showing the configuration of the reference axis index member.
As shown in Fig. 12, the reference core index member 130 is a member attached to the threshold 1 in order to position the threshold 1 in accordance with the position of the reference core 3. Two reference core index members 130 are attached to each threshold 1. The two reference core index members 130 have a symmetrical structure when viewed from the X-axis direction, but are basically configured the same. The configuration of the reference core index member 130 will be described in detail below.

The reference core indicator member 130 is fitted onto the upper surface of the threshold 1 so as to straddle one of the guide grooves 18 and the side surface 1a of the threshold 1, and can be fixed to the threshold 1 by a set screw 131. The reference core indicator member 130 has a cutout portion 132 for aligning the reference core 3, a window portion 133 for aligning the opening marking line 13, and a through hole 134. The cutout portion 132 serves as an indicator portion for aligning the position of the threshold 1 based on the position of the reference core 3. The window portion 133 is constituted by a long hole. The long hole constituting the window portion 133 is arranged in a direction perpendicular to the longitudinal direction of the threshold 1. When attaching the reference center index member 130 to the threshold 1, the worker visually checks the position of the opening marking line 13 through the window 133 and adjusts the attachment position of the reference center index member 130 so that the opening marking line 13 is located at the center of the width direction (short axis direction of the long hole) of the window 133. The through hole 134 is a hole for attaching a string or chain to the reference center index member 130 to prevent the reference center index member 130 from accidentally falling to the bottom of the elevator shaft 6 when attaching or detaching the reference center index member 130 to the threshold 1.

By attaching the two reference core indicator members 130 having the above configuration to the threshold 1 in alignment with the positions of the corresponding opening marking lines 13, the corners of the notches 132 in each reference core indicator member 130 become the indicator positions to be aligned with the reference core 3. Therefore, in either of the two reference core indicator members 130, the threshold 1 can be positioned in the horizontal plane by adjusting the position of the threshold 1 so that the reference core 3 contacts the corners of the notches 132, as shown in Figure 12.

FIG. 13 is a schematic diagram showing the system configuration of the threshold positioning device according to the first embodiment.
For ease of explanation, in this specification, the adjustment mechanism 101 and its components located on the left side when looking at the opening 4 from the elevator shaft 6 side will each be marked with the letter "L", and the adjustment mechanism 101 and its components located on the right side will each be marked with the letter "R".

As shown in FIG. 13, in the control unit 120, the operation signal and the mode switching signal are input from the operation section 122 to the control section 121a, and the tilt detection signal is input from the tilt sensor 123 to the control section 121a. The control section 121a also provides the drive signal to the actuator 107L of the left adjustment mechanism 101L, and also provides the drive signal to the actuator 107R of the right adjustment mechanism 101R. In other words, the control section 121a provides the drive signals to the left and right actuators 107L, 107R individually.

The left adjustment mechanism 101L is provided with an encoder 129L, and the right adjustment mechanism 101R is provided with an encoder 129R. The encoder 129L is a sensor that detects the amount of rod displacement when the rod portion 107a of the actuator 107L is moved forward and backward, and outputs a displacement detection signal that is the detection result to the control unit 121a. Similarly, the encoder 129R is a sensor that detects the amount of rod displacement when the rod portion 107a of the actuator 107R is moved forward and backward, and outputs a displacement detection signal that is the detection result to the control unit 121a. When a drive signal is given to the actuator 107L, the control unit 121a judges whether the rod portion 107a of the actuator 107L has moved to the target position based on the displacement detection signal from the encoder 129L. Similarly, when a drive signal is given to the actuator 107R, the control unit 121a judges whether the rod portion 107a of the actuator 107R has moved to the target position based on the displacement detection signal from the encoder 129R. In other words, in this embodiment, feedback control is used as a method for controlling the left and right actuators 107L, 107R. Note that communication between the left and right adjustment mechanisms 101L, 101R and the control unit 120 may be achieved either wired or wirelessly.

Next, we will explain the control modes of the threshold positioning device 100. There are two control modes: manual control mode and automatic horizontal control mode.

FIG. 14 is a diagram showing a control loop when the manual control mode is applied.
The manual control mode is a mode in which the left and right adjustment mechanisms 101L and 101R are controlled independently. Specifically, when an operation signal is sent from the operation knob 128a to the control unit 121a, a drive signal based on this operation signal is sent from the control unit 121a to the actuator 107R. At this time, a displacement detection signal related to the rod displacement amount of the actuator 107R is sent from the encoder 129R to the control unit 121a, and the control unit 121a controls the operation of the actuator 107R based on the displacement detection signal. Similarly, when an operation signal is sent from the operation knob 128c to the control unit 121a, a drive signal based on this operation signal is sent from the control unit 121a to the actuator 107L. At this time, a displacement detection signal related to the rod displacement amount of the actuator 107L is sent from the encoder 129L to the control unit 121a, and the control unit 121a controls the operation of the actuator 107L based on the displacement detection signal.

FIG. 15 is a diagram showing a control loop when the automatic horizontal control mode is applied.
The automatic level control mode is a mode in which one of the left and right adjustment mechanisms 101L, 101R is controlled as the master side (driven side) and the other as the slave side (followed side). In this embodiment, as an example, the right adjustment mechanism 101R is the master side and the left adjustment mechanism 101L is the slave side.
In the automatic horizontal control mode, for the right adjustment mechanism 101R, which is the master side, the control unit 121a controls the operation of the actuator 107R according to the operation signal sent from the operation knob 128a, as in the case of the manual control mode described above. On the other hand, for the left adjustment mechanism 101L, which is the slave side, the control unit 121a controls the operation of the actuator 107L based on the tilt detection signal sent from the tilt sensor 123. Specifically, the tilt angle of the threshold 1 in the roll direction is detected by the tilt sensor 123, and the tilt detection signal, which is the detection result, is taken into the control unit 121a. Then, the control unit 121a sends a drive signal to the actuator 107L of the left adjustment mechanism 101L so that the tilt angle of the threshold 1 indicated by the tilt detection signal becomes 0 degrees. This allows the threshold 1 to be always kept horizontal when viewed from the X-axis direction. The tilt angle of the threshold 1 indicated by the tilt detection signal becomes 0 degrees when the threshold 1 is horizontal when viewed from the X-axis direction.

(Threshold installation method)
Next, a threshold installation method using the threshold positioning device according to the first embodiment will be described with reference to the flow chart of FIG.
First, as shown in Fig. 17, the worker draws a finishing line 16 a specified distance below the relief mark 15 that has been previously marked (step S1). Fig. 17 is a view of the opening 4 before the installation of the threshold, as seen from the landing side. The relief mark 15 is a line drawn horizontally on the wall surface beside the opening 4, and is often drawn about 1 m above the floor surface after completion of construction. The floor surface after completion of construction is the floor surface formed by laying floor materials or the like on the building floor 5 such as concrete. In this case, the worker draws the finishing line 16 horizontally 1 m below the relief mark 15. The position of the finishing line 16 indicates the position where the height of the upper surface of the threshold 1 should be adjusted in the Z-axis direction.

Next, as shown in FIG. 17, the worker places a laser marker 9 on the building floor 5 in front of the opening 4 and irradiates a horizontal laser line 10 toward the opening 4 (step S2). After that, the worker measures the distance H between the finishing line 16 and the horizontal laser line 10 in the Z-axis direction with a ruler or the like, and records the measurement result on a notepad or a mobile device (step S3). The distance H measured by the worker is used when adjusting the height of the threshold 1.

Next, the worker takes the threshold 1 with the three brackets 2 attached as shown in FIG. 2 into the hoistway 6 (step S4). Each bracket 2 is attached in a position that does not interfere with the positioning work of the threshold 1. The hoistway 6 is provided with a fixed scaffold or a work platform that can be raised and lowered.

Next, the worker installs the pair of adjustment mechanisms 101 provided in the threshold positioning device 100 (step S5). At this time, the worker installs the pair of adjustment mechanisms 101 on the corresponding opening side parts 7 by fixing the base plate 105 to the left and right opening side parts 7 with the clamps 8, as shown in FIG. 18. In addition, the worker uses the position adjustment function of the horizontal position adjustment part 106 to pull out the height adjustment part 103 toward the center of the opening 4 to a position where the movable member 163 contacts the anti-pullout member 164 so that the support arm 102 of the adjustment mechanism 101 does not contact the reference core 3.

Next, the worker places the threshold 1 taken in step S4 on the third arm portion 102c of the support arm 102 (step S6). At this time, if necessary, the worker loosens the tightening of the arm position adjustment knob 116 and pulls out the support arm 102 to the elevator shaft 6 side, as shown in FIG. 19. By pulling out the support arm 102 in this way, a space 26 can be secured between the third arm portion 102c of the support arm 102 and the opening 4. This makes it easier to place the threshold 1 on the third arm portion 102c of the threshold 1. After placing the threshold 1 on the support arm 102, the worker returns the support arm 102 pulled out as described above to its original position. In addition, the worker temporarily attaches the threshold 1 to the support arm 102 using the threshold temporary fixing device 119, as shown in FIG. 9 and FIG. 10. At this time, the worker attaches the temporary threshold fixing device 119 by passing the screw shaft (not shown) of the temporary threshold fixing device 119 through the dirt drop hole 14 of the threshold 1 and the long threshold fixing hole 118 of the third arm portion 102c. The worker also fixes the temporary threshold fixing device 119 loosely so that there is a little play so that the threshold 1 can be moved on the third arm portion 102c.

Next, the worker installs the control unit 120 on the top surface of the threshold 1 (step S7). This completes the installation of the threshold positioning device 100 (see Figure 5). After this, the worker moves on to the positioning work of the threshold 1.

First, the worker adjusts the inclination of the support arm 102 relative to the depth direction of the opening 4 using the front-rear inclination adjustment unit 104 (step S8). Specifically, the worker places a spirit level on the top surface of the threshold 1, and while checking the position of the air bubble in the spirit level, rotates the two front-rear inclination adjustment knobs 110 appropriately. Then, the worker adjusts the amount of rotation of the front-rear inclination adjustment knobs 110 so that the inclination angle of the support arm 102 relative to the depth direction of the opening 4 becomes zero. This adjustment work is performed in parallel by the pair of adjustment mechanisms 101.

Next, the operator turns on the power supplies 113, 124 of each part of the threshold positioning device 100, and then operates the operation knob 128b on the operation unit 122 to enable (ON) the automatic horizontal control mode (step S9). When the automatic horizontal control mode is enabled, as explained above with reference to FIG. 15, the control unit 121a controls the operation of the actuator 107L based on the tilt detection signal from the tilt sensor 123. Therefore, when viewed from the X-axis direction, the threshold 1 is supported horizontally by the left and right support arms 102.

Next, the worker operates the operation knob 128a on the operation unit 122 to operate the left and right height adjustment units 103 to adjust the height of the threshold 1 (step S10). At that time, the worker first measures how far the horizontal laser line 10 projected from the laser marking device 9 onto the height indicator plate 127 is from the top surface of the threshold 1 by reading the scale on the height indicator plate 127. Next, the worker compares the distance measured using the height indicator plate 127 with the distance L recorded in advance (see FIG. 17), and operates the operation knob 128a so that the difference between these distances becomes zero. This allows the top surface of the threshold 1 supported by the support arm 102 to be aligned with the finishing line 16 (see FIG. 17) in the height direction of the opening 4. In addition, since the control mode is the automatic horizontal control mode, the threshold 1 can be maintained horizontal when viewed from the X-axis direction and the height of the threshold 1 can be adjusted.

Once the height of the threshold 1 has been determined in this way, the operator operates the operation knob 128b to disable (OFF) the automatic level control mode (step S11). This stops the movement of both actuators 107L and 107R.

The above-described positioning work of the threshold 1 completes the inclination adjustment of the threshold 1 in the pitch direction, the inclination adjustment of the threshold 1 in the roll direction, and the height adjustment of the threshold 1. When the positioning work of the threshold 1 is completed in this manner, the threshold 1 is supported horizontally by the left and right support arms 102. In addition, the upper surfaces of the third arm portions 102c of the left and right support arms 102 are positioned on the same horizontal plane. Therefore, even if the threshold 1 is moved on the left and right third arm portions 102c in the next step, there will be no deviation in the inclination adjustment and height adjustment of the threshold 1 described above.

Next, the worker adjusts the position of the threshold 1 on the horizontal plane (step S12). Specifically, the worker attaches the reference core indicator member 130 to a predetermined position of the threshold 1 (on the left and right opening marking lines 13) as an indicator for adjusting the position of the threshold 1, as shown in Figures 5 and 12. Next, the worker moves the threshold 1 supported by the left and right support arms 102 on the third arm portion 102c as appropriate, so that the notches 132 of the left and right reference core indicator members 130 come into contact with the corresponding reference cores 3. This adjusts the position of the threshold 1 in the width direction (X-axis direction) of the opening 4, the position of the threshold 1 in the depth direction (Y-axis direction) of the opening 4, and the inclination of the threshold 1 in the yaw direction.
This completes the positioning of the threshold 1.

Next, the worker temporarily fixes the threshold 1 to the support arm 102 by tightening the temporary threshold fixing device 119 so that the threshold 1 positioned as described above does not shift (step S13). After this, the worker proceeds to the work of fixing the threshold 1.

First, the worker loosens the fasteners 12 attached to the brackets 2 and the fasteners 24 attaching the brackets 2 to the threshold 1 as appropriate, brings the wall brackets 2a of each bracket 2 into close contact with the wall surface 11 of the elevator shaft 6, and fixes the wall brackets 2a to the wall surface 11 with anchor bolts or welding (step S14). Note that when fixing the wall surface 11 to a steel frame with the brackets 2, the wall brackets 2a are fixed by bringing them into close contact with the steel frame.

Next, the worker tightens the fasteners 12 and 24 described above to fix the threshold side bracket 2b to the threshold 1 and fix the threshold side bracket 2b to the wall side bracket 2a (step S15). This completes the threshold fixing work.

Thereafter, the worker removes the threshold positioning device 100 from the threshold 1 (step S15). The removal operation of the threshold positioning device 100 is performed, for example, in the following procedure.
First, the worker removes the temporary threshold fixing device 119. Next, the worker loosens the tightening of the arm position adjustment knob 116. Next, the worker removes the clamp 8 while holding the base plate 105 with his or her hand. Next, the worker removes the adjustment mechanism 101 from the threshold 1 and the opening side portion 7, being careful not to hit the support arm 102 too hard against the threshold 1. Using the above procedure, the worker removes the left and right adjustment mechanisms 101 in order. Next, the worker removes the control unit 120 from the threshold 1.
The above is the sequence of steps for installing the threshold 1.

As described above, the threshold positioning device 100 according to the first embodiment includes a pair of adjustment mechanisms 101. Each adjustment mechanism 101 includes a support arm 102 that supports the threshold 1 in a placed state, a height adjustment unit 103 that adjusts the height of the support arm 102, and a front-rear tilt adjustment unit 104 that adjusts the tilt of the support arm 102 relative to the depth direction of the opening 4. Therefore, the worker performing the threshold installation work can adjust the position of the threshold 1 using the adjustment functions of the height adjustment unit 103 and the front-rear tilt adjustment unit 104. This makes it easier to adjust the position of the threshold 1 than in the past. As a result, the time required for the threshold installation work can be shortened. In addition, at the stage of fixing the bracket 2 to the wall surface 11 of the elevator 6, the upper, lower, left and right positions of the threshold 1 have already been determined, so it is sufficient to fix the bracket 2 at the place where it is pressed against the wall surface 11. This eliminates the need for marking the mounting location of the bracket 2, which was previously required. Furthermore, in the threshold positioning device 100 according to the first embodiment, a pair of adjustment mechanisms 101 are configured to be installed side-by-side in the width direction of the opening 4. This allows the threshold positioning device 100 to be used regardless of the unevenness of the building floor 5, even if a groove for passing rainwater is formed in the building floor 5.

In addition, in the first embodiment, a pair of adjustment mechanisms 101 are attached to the left and right opening side portions 7. This has the advantage that the adjustment mechanisms 101 are unlikely to be an obstacle to an operator entering and exiting the opening portion 4.

In addition, in the first embodiment, each of the pair of adjustment mechanisms 101 has a horizontal position adjustment section 106 that adjusts the position of the support arm 102 in the width direction of the opening 4. Therefore, the position of the support arm 102 can be adjusted so that the position of the threshold fixing long hole 118 of the support arm 102 matches the position of the dust hole 14 of the threshold 1.

In addition, in the first embodiment, the height adjustment unit 103 has an actuator 107 for changing the height of the support arm 102, and the threshold positioning device 100 further has an inclination sensor 123 that detects the inclination of the threshold 1 relative to the width direction of the opening 4, and a control unit 121a that controls the actuator 107 based on the detection result of the inclination sensor 123. This makes it possible to adjust the height of the threshold 1 while maintaining it in a horizontal position, without having to install a spirit level or the like on the upper surface of the threshold 1.

In addition, in the first embodiment, the height detection device has a laser marker 9 that emits a horizontal laser line 10, and a height indicator plate 127 onto which the horizontal laser line 10 emitted from the laser marker 9 is irradiated and which can measure the distance from the top surface of the threshold 1 supported by the support arm 102 to the horizontal laser line 10. This allows the height of the threshold 1 to be checked using the height indicator plate 127 while the height of the threshold 1 is adjusted by the height adjustment unit 103.

In addition, in the first embodiment, each of the pair of adjustment mechanisms 101 has an arm position adjustment mechanism (long hole 117 for fixing the arm, arm support plate 150, arm position adjustment knob 116) that adjusts the position of the support arm 102 in the depth direction of the opening 4. This allows the position of the support arm 102 to be adjusted so that the threshold 1 can be easily placed on the support arm 102.

The threshold positioning device 100 according to the first embodiment also includes a temporary threshold fixing device 119 that fixes the threshold 1 to the third arm portion 102c through the dirt drop hole 14 of the threshold 1 and the long threshold fixing hole 118 of the support arm 102. This prevents the threshold 1 from falling off the support arm 102 during the positioning operation. It also prevents the threshold 1 from shifting out of position after positioning is complete.

In addition, in the first embodiment, each of the pair of adjustment mechanisms 101 has a base plate 105 fixed to the opening side portion 7 and a support leg 111 installed so as to be in contact with the building floor 5. This makes it easy to install the adjustment mechanism 101 even when the base plate 105 is installed floating above the building floor 5. In addition, the posture of the adjustment mechanism 101 can be stabilized even after the adjustment mechanism 101 is installed.

The threshold positioning device 100 according to the first embodiment also has an operation unit 122 for operating the actuator 107 of the height adjustment unit 103, and a control unit 121a for controlling the actuator 107 based on an operation signal from the operation unit 122. This eliminates the need to manually adjust the height of the threshold 1.

In addition, in the threshold installation method according to the first embodiment, the threshold 1 is positioned using the threshold positioning device 100, and then the threshold 1 is fixed to the building wall surface 11 using the bracket 2. This allows the threshold 1 to be positioned without causing positional interference between the threshold 1 and the bracket 2.

Second Embodiment
FIG. 20 is a view of the threshold positioning device according to the second embodiment as viewed from the elevator shaft side.
The threshold positioning device 140A according to the second embodiment is equipped with a pair of adjustment mechanisms 141L and 141R. The pair of adjustment mechanisms 141L and 141R have the same mechanism as the pair of adjustment mechanisms 101 described above, except that they are equipped with control boxes 142 and 144 and operation knobs 143 and 145. Therefore, detailed explanations of each of the adjustment mechanisms 141L and 141R will be omitted. The operation knobs 143 and 145 function as operation units.

The threshold positioning device 140A according to the second embodiment differs from the threshold positioning device 100 according to the first embodiment in that it does not have the control unit 120 that was installed on the top surface of the threshold 1, but instead incorporates a control box 142 and an operating knob 143 in the left adjustment mechanism 141L, and a control box 144 and an operating knob 145 in the right adjustment mechanism 141. Also, although not shown in FIG. 20, for example, the control box 142 has a built-in control unit that controls the actuator provided in the left adjustment mechanism 141L, and the control box 144 has a built-in control unit that controls the actuator provided in the right adjustment mechanism 141R.

FIG. 21 is a schematic diagram showing the system configuration of a threshold positioning device according to the second embodiment.
As shown in FIG. 21, the left adjustment mechanism 141L and the right adjustment mechanism 141R are configured as independent systems. Specifically, the left adjustment mechanism 141L has a control unit 142a built in the control box 142 described above. The control unit 142a controls the actuator 147L based on an operation signal from the operation knob 143. The power source 113L supplies power to the control unit 142a, the actuator 147L, and the encoder 148L. On the other hand, the right adjustment mechanism 141R has a control unit 144a built in the control box 144 described above. The control unit 144a controls the actuator 147R based on an operation signal from the operation knob 145. The power source 113R supplies power to the control unit 144a, the actuator 147R, and the encoder 148R.

In the threshold positioning device 100 according to the first embodiment, the control unit 120 installed on the threshold 1 is provided with an inclination sensor 123, but the threshold positioning device 140A according to the second embodiment does not have an inclination sensor 123. Therefore, when adjusting the inclination of the threshold 1 in the roll direction, the operator places a spirit level on the top surface of the threshold 1 and operates the left and right operating knobs 143, 145 while visually checking the position of the air bubble on the spirit level.

In this way, the threshold positioning device 140A according to the second embodiment is configured so that the control unit 120 is not installed on the upper surface of the threshold 1. For this reason, in the threshold positioning device 100 according to the first embodiment, when communicating via wire between the control unit 120 and the left and right adjustment mechanisms 101, it is necessary to lay out wiring, but in the threshold positioning device 140A according to the second embodiment, such wiring is not necessary. Therefore, the threshold positioning device 140A according to the second embodiment simplifies the installation and handling of the device.

<Modifications, etc.>
The present invention is not limited to the above-described embodiment, but includes various modified examples. For example, the above-described embodiment has been described in detail to facilitate understanding of the contents of the present invention, but the present invention is not necessarily limited to having all the configurations described in the above-described embodiment. It is also possible to replace a part of the configuration of one embodiment with the configuration of another embodiment. It is also possible to add the configuration of another embodiment to the configuration of one embodiment. It is also possible to delete a part of the configuration of each embodiment, add another configuration, or replace it with another configuration.

For example, in the first embodiment, an electric actuator 107 is used for the height adjustment unit 103 of the adjustment mechanism 101, but this may be replaced by manual operation. The height adjustment unit 103 may be configured to move the sliding stage 108 up and down using a ball screw with an adjustment knob. In the first embodiment, the front-rear tilt adjustment unit 104 is configured to rotate the arm support plate 150 around the rotation axis 109 by rotating two front-rear tilt adjustment knobs 110 manually by an operator, but the front-rear tilt adjustment unit 104 may be configured to be operated electrically.

It is also possible to increase the range of motion of the support arm 102 in the X-axis direction by making the longitudinal dimension of the arm fixing long hole 117 of the support arm 102 longer than the length shown in FIG. 6. When the arm fixing long hole 117 is lengthened in this way, the support arm 102 can be pushed toward the platform. This allows the support arm 102 to be retracted from the elevator shaft 6, eliminating any obstacles between the opening 4 and the reference center 3. This makes it easier to insert the threshold 1 between the opening 4 and the reference center 3.

In addition, in the first embodiment, one base plate 105 is fixed to the opening side 7 with one clamp 8, but this is not limited thereto, and one base plate 105 may be fixed to the opening side 7 with multiple (e.g., two) clamps 8.

1... threshold, 2... bracket, 3... reference center, 4... opening, 5... building floor, 6... elevator, 7... opening side, 9... laser marking device (height detection device), 10... horizontal laser line, 11... wall surface, 14... dust drop hole, 100, 140A... threshold positioning device, 101, 141L, 141R... adjustment mechanism, 102... support arm, 102c... third arm portion (arm portion), 103... height adjustment portion, 104... front-rear tilt adjustment portion (tilt adjustment portion), 105... base plate (base member), 106... horizontal position adjustment portion (arm position adjustment unit), 107, 147L, 147R...actuator, 111...support leg, 116...arm position adjustment knob (arm position adjustment mechanism), 117...long hole for fixing the arm (arm position adjustment mechanism), 118...long hole for fixing the threshold (long hole), 119...temporary threshold fixing device (fixing device), 121a, 142a, 144a...control unit, 122...operation unit, 123...tilt sensor (tilt detection unit), 127...height indicator plate (height detection device), 143, 145...operation knob (operation unit), 150...arm support plate (arm position adjustment mechanism)

Claims (9)

A threshold positioning device for positioning a threshold installed in an opening of an elevator shaft, comprising:
A pair of adjustment mechanisms is provided, the adjustment mechanism having a support arm that supports the threshold in a placed state, a height adjustment unit that adjusts the height of the support arm, and an inclination adjustment unit that adjusts the inclination of the support arm with respect to the depth direction of the opening,
The pair of adjustment mechanisms are configured to be installed side by side in a width direction of the opening,
The pair of adjustment mechanisms are attached to the opening side portions located on the left and right of the opening.
Threshold positioning device. The threshold positioning device according to claim 1 , wherein each of the pair of adjustment mechanisms has an arm position adjustment portion that adjusts the position of the support arm in the width direction of the opening. the height adjustment unit has an actuator for changing the height of the support arm,
an inclination detection unit that detects an inclination of the threshold with respect to a width direction of the opening;
The threshold positioning device according to claim 1 , further comprising: a control unit that controls the actuator based on a detection result of the tilt detection unit. A height detection device is provided to detect the installation height of the threshold,
The threshold positioning device as described in claim 1, wherein the height detection device comprises a laser level that emits a horizontal laser line, and a height indicator plate onto which the horizontal laser line emitted from the laser level is irradiated and which can measure the distance from the top surface of the threshold supported by the support arm to the horizontal laser line. The threshold positioning device according to claim 1 , wherein each of the pair of adjustment mechanisms has an arm position adjustment mechanism that adjusts the position of the support arm in the depth direction of the opening. The threshold has a dust hole,
The support arm has a long hole in an arm portion on which the threshold is placed,
The threshold positioning device according to claim 1 , further comprising a fastener for fastening the threshold to the arm portion through the dust drop hole and the long hole. The threshold positioning device described in claim 1 , wherein each of the pair of adjustment mechanisms has a base member fixed to the opening side portions located on the left and right of the opening, and a support leg installed so as to contact the building floor. the height adjustment unit has an actuator for changing the height of the support arm,
an operation unit for operating the actuator of the height adjustment unit;
The threshold positioning device according to claim 1 , further comprising: a control unit that controls the actuator based on an operation signal from the operation unit. A threshold installation method using the threshold positioning device according to claim 1, comprising the steps of:
A threshold installation method, comprising: positioning the threshold using the threshold positioning device; and then fixing the threshold to a wall or a steel frame of a building using a bracket.