Threshold Position Determination Device and Threshold Installation Method

Abstract

To provide a technique for adjusting the position of a sill more easily than before.SOLUTION: There is provided a sill positioning device for positioning a sill installed at the opening of an elevator hoistway. The sill positioning device has a pair of adjustment mechanisms including a support arm that supports the sill in a resting position, a height adjuster that adjusts the height of the support arm, and a tilt adjuster for adjusting the tilt of the support arm with respect to the depth direction of the opening. The pair of adjustment mechanisms can be installed side-by-side in the width direction of the opening.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a threshold positioning device and a threshold installation method.

Background Art

[0002] In developed countries such as Japan, North America, and Europe, the decrease in construction workers due to the declining birthrate and aging population has become a problem. This problem is no exception in the elevator installation industry. For this reason, even if the number of workers decreases, it is required to improve the efficiency and labor-saving of construction work so that the same number of installations as before can be processed.

[0003] Elevator installation work includes various types of work such as in-tower measurement, rail installation, entrance / exit installation, in-tower equipment installation, car assembly, etc. Among these installation works, the entrance / exit installation is the work of closing the opening of the hoistway formed in the building. Therefore, considering the safety aspect of construction work, it is desirable to quickly complete the entrance / exit installation. However, the entrance / exit installation is a work that is repeated for each floor of the building and involves handling long members and heavy objects, so it requires labor and time.

[0004] The elevator entrance is mainly composed of a threshold (sill), a three-sided frame, and a door pocket. The threshold is a component that bears the foundation of the entrance. In the threshold installation work, it is required to accurately adjust the position of the threshold in each of the six degrees of freedom, such as making the gap between the car moving up and down the hoistway and the threshold of each floor constant, and installing the threshold horizontally so that the elevator landing door moves smoothly. Here, the six degrees of freedom refer to the degrees of freedom in six directions: the X-axis direction, the Y-axis direction, the Z-axis direction, the pitch direction, the roll direction, and the yaw direction.

[0005] In the installation work of a threshold, when accurately adjusting the position of the threshold, it is conceivable to use a device or jig that supports the efficiency improvement and labor reduction of the adjustment work. Patent Document 1 describes a technique related to an elevator landing threshold adjustment jig and a threshold adjustment method. The technique described in Patent Document 1 aims to provide an elevator landing threshold adjustment jig and a threshold adjustment method that enable adjustment of the longitudinal direction and elevation angle of the threshold in the elevator landing. In response to this problem, Patent Document 1 includes a jig fixed to the side surface of the threshold, with notches formed in each of the upper and lower adjustment pieces, and adjusts the horizontal direction of the threshold and the elevation angle with the landing surface based on the positional relationship between the centering wire suspended from the top of the elevator hoistway and the notches in each of the upper and lower adjustment pieces. The configuration of the elevator landing threshold adjustment jig is described.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] In the conventional threshold position adjustment work, the threshold is temporarily fixed on a bracket pre-fixed to the wall surface in the hoistway, and the operator adjusts the posture and position of the bracket or the threshold by hitting the bracket or the threshold with a hammer based on a centering piano wire or a level vertically lowered from the top of the hoistway. However, in this method, the moving direction, angle, and moving amount of the threshold change due to the temporary fixing condition of the threshold, the hitting position, hitting angle, and adjustment of the hitting force of the hammer. For this reason, it is difficult to adjust the position of the threshold as intended by the operator, and skilled skills and know-how are required. In addition, unskilled operators have the problem that they have to hit the threshold with a hammer many times before finishing the threshold position adjustment, which takes a long time for the work.

[0008] Regarding such problems, the elevator landing sill adjusting tool described in Patent Document 1 is merely an index plate for easily visually checking the positional relationship between a piano wire, which is a centering wire suspended from the top of the hoistway, and the respective notches of the upper and lower adjusting pieces of the sill adjusting tool. Therefore, even when using the elevator landing sill adjusting tool described in Patent Document 1, skilled skills are required for adjusting the position of the sill.

[0009] An object of the present invention is to provide a technique that can more easily adjust the position of a sill than in the prior art.

Means for Solving the Problems

[0010] To solve the above problems, for example, the configuration described in the claims is adopted. This application includes a plurality of means for solving the above problems. If one of them is mentioned, it is a sill positioning device for positioning a sill installed at the opening of the hoistway of an elevator. This sill positioning device includes a support arm that supports the sill in a mounted 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, and includes a pair of adjustment mechanisms. The pair of adjustment mechanisms are configured to be installable side by side in the width direction of the opening.

Effects of the Invention

[0011] According to the present invention, the position of the sill can be adjusted more easily than in the prior art. Problems, configurations, and effects other than those described above will be clarified by the description of the following embodiments.

Brief Description of the Drawings

[0012]

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Best Mode for Carrying Out the Invention

[0013] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In this specification and the drawings, elements having substantially the same function or configuration are denoted by the same reference numerals, and redundant descriptions are omitted.

[0014] First, the coordinate system used in this specification and the drawings will be described with reference to FIG. 1. As shown in FIG. 1, an opening 4 is formed in the hoistway 6 of the elevator. The opening 4 is an opening for forming the entrance and exit of the elevator. The opening 4 is formed in a quadrilateral 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-rear direction) when a person stands on the building floor 5 that serves as 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 (left-right direction) in which the elevator landing door opens and closes. Also, 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 axial directions parallel to the horizontal plane, which is the horizontal two-axis direction, and the Z-axis direction corresponds to the vertical direction perpendicular to the horizontal plane. Note that the definition of the coordinate system described with reference to FIG. 1 is also applicable to the drawings other than FIG. 1.

[0015] Next, the installation state and configuration of the threshold will be described with reference to FIGS. 1 to 4. As shown in Fig. 1, the threshold 1 is installed at the opening 4 using a plurality of brackets 2. The opening 4 is formed for each floor of the building. On the left and right sides of the opening 4, opening side portions 7 are respectively located. The elevator shaft 6 is formed on the back side of the opening 4 as seen from 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 the wall surface 11 of the elevator shaft 6 in order to indicate the reference position when positioning the threshold 1. A thin wire such as a piano wire with a diameter of about 0.5 mm is used for the reference core 3. The two reference cores 3 are vertically suspended from the top to the bottom of the elevator shaft 6. The interval between the two reference cores 3 in the Y-axis direction is set to a predetermined interval.

[0016] Fig. 2 is a perspective view showing the arrangement of the threshold and the brackets. 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 the wall surface 11 (see Fig. 1) of the elevator shaft 6 or the steel frame (not shown) using a plurality of brackets 2. In this embodiment, as an example, it is assumed that the threshold 1 is fixed to the wall surface 11 of the elevator shaft 6 using three brackets 2.

[0017] The brackets 2 are arranged at three positions at a predetermined interval in the width direction of the opening 4. The bracket 2 is composed of two bracket parts, namely, a wall-side bracket 2a and a threshold-side bracket 2b. The wall-side bracket 2a is a bracket fixed to the wall surface 11 of the elevator shaft 6, and the threshold-side bracket 2b is a bracket fixed to the threshold 1. The wall-side bracket 2a is formed in an L shape, and the threshold-side bracket 2b is also formed in an L shape. Then, the wall-side bracket 2a and the threshold-side bracket 2b are fastened by two fasteners 12 in a state where one piece of each is overlapped with each other.

[0018] The fastener 12 is composed of, for example, a bolt, a nut, and a washer. As shown in FIG. 3, the threshold side bracket 2b is provided with two long holes 17. The long holes 17 are formed vertically. Further, as shown in FIG. 10, the threshold side bracket 2b is provided with a fixing hole 23. The fixing hole 23 is a hole for fixing the threshold side bracket 2b of the bracket 2 to the lower surface of the threshold 1 using a fastener 24. On the other hand, as shown in FIG. 2, the wall side bracket 2a is provided with three long holes 21 and three fixing holes 22. Both the long holes 21 and the fixing holes 22 are formed horizontally. The long hole 21 is a hole for fastening the wall side bracket 2a and the threshold side bracket 2b. The fixing hole 22 is a hole for fixing the wall side bracket 2a to the wall surface 11 of the hoistway 6. Among the three long holes 21, the upper and lower two long holes 21 are arranged so as to overlap the corresponding long holes 17. The shaft portion of the fastener 12 is attached so as to penetrate the long hole 17 and the long hole 21. The relative mounting position between 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.

[0019] The threshold 1 is a long member. As shown in FIG. 4, the threshold 1 is provided with two guide grooves 18 and a plurality of dust removal holes 14. The two guide grooves 18 are formed parallel to each other along the longitudinal direction of the threshold 1. The guide groove 18 is a groove for guiding the movement of a landing door (not shown) that opens and closes the elevator entrance and exit. The dust removal holes 14 are provided at a plurality of positions in each guide groove 18. The dust removal hole 14 is a hole for dropping the dust that has entered the guide groove 18.

[0020] Two opening border lines 13 are drawn on the upper surface of the threshold 1. The opening border lines 13 are used when adjusting the position of the threshold 1 in a horizontal plane parallel to the X-axis direction and the Y-axis direction. Specifically, the position of the threshold 1 is adjusted so that the reference core 3 is located on the extension line of each opening border line 13. For this reason, the interval between the two opening border lines 13 in the longitudinal direction of the threshold 1 is set in accordance with the interval between the two reference cores 3 described above.

[0021] <First Embodiment> (Configuration of the 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.

[0022] The pair of adjustment mechanisms 101 is a mechanism for adjusting the installation position of the threshold 1. The pair of adjustment mechanisms 101 is configured to be installed side by side in the width direction of the opening 4. The pair of adjustment mechanisms 101 is attached to the opening side portions 7 located on the left and right of the opening 4. The pair of adjustment mechanisms 101 has a bilaterally symmetric structure when viewed from the X-axis direction, but basically has the same configuration. Hereinafter, the configuration of the adjustment mechanism 101 will be described in detail.

[0023] (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.

[0024] (Support arm) The support arm 102 is a member that supports the threshold 1 in a state where the threshold 1 is placed thereon. The support arm 102 integrally has a first arm portion 102a, a second arm portion 102b, and a third arm portion 102c. The first arm portion 102a and the second arm portion 102b are arranged perpendicular to each other. The first arm portion 102a and the third arm portion 102c are arranged parallel to each other. Further, the second arm portion 102b connects one end of the first arm portion 102a and 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.

[0025] An elongated hole 117 for arm fixing is formed in the first arm portion 102a, and an elongated hole 118 for threshold fixing is formed in the third arm portion 102c. The elongated hole 117 for arm fixing is a hole for fixing the support arm 102 to the arm support plate 150. The elongated hole 118 for threshold fixing is a hole for fixing the threshold 1 to the third arm portion 102c. The elongated hole 117 for arm fixing is formed long in the longitudinal direction of the first arm portion 102a, and the elongated hole 118 for threshold fixing is formed long in the longitudinal direction of the third arm portion 102c.

[0026] 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 meshes 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 meshes with the screw hole of the arm receiving portion 150a through the elongated hole 117 for arm fixation 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. That is, by tightening the arm position adjustment knob 116, the support arm 102 can be fixed to the arm support plate 150. Also, when the tightening of the arm position adjustment knob 116 is loosened, the first arm portion 102a can be moved in the longitudinal direction of the elongated hole 117 for arm fixation. That is, by loosening the tightening of the arm position adjustment knob 116, the position of the support arm 102 in the X-axis direction can be adjusted. From this, the arm position adjustment mechanism for adjusting the position of the support arm 102 in the depth direction of the opening 4 is constituted by the elongated hole 117 for arm fixation, the arm support plate 150, and the arm position adjustment knob 116.

[0027] (Height adjustment section) The height adjustment section 103 is a portion for adjusting the height of the support arm 102. The height adjustment section 103 mainly includes an actuator 107, a sliding stage 108, an actuator power source 113, a back plate 114, and a pair of guide shafts 115. In the present embodiment, as an example, the actuator 107 is constituted by an electric linear actuator. The actuator 107 has a rod portion 107a, a case portion 107b, and a motor portion 107c.

[0028] The rod portion 107a expands and contracts according to the drive of the motor portion 107c. The motor portion 107c is connected to the upper plate 152 via the joint member 151. The actuator power source 113 is attached to the upper plate 152. The motor portion 107c is electrically connected to the actuator power source 113 via wiring (not shown), and power is supplied from the actuator power source 113 to the motor portion 107c through the wiring. The case portion 107b incorporates a 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 the joint member 153. The case portion 107b is fixed to the intermediate plate 156 using the band 154 and the bolt 155. The intermediate plate 156 is fixed to the back plate 114 using bolts (not shown).

[0029] 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 the support leg fixtures 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 for stabilizing 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 while floating it from the building floor 5 without contacting the building floor 5.

[0030] When using the support legs 111, the lower ends of the support legs 111 will contact the building floor 5. That is, the support legs 111 are installed so as to contact the building floor 5. Thereby, while supporting the entire adjustment mechanism 101 with the support legs 111, the base plate 105 can be brought into close contact with the opening side portion 7 and the base plate 105 can be fixed to the opening side portion 7 by the clamp 8.

[0031] Note that the support leg 111 may be attached to the base plate 105 instead of the back plate 114. Also, when the lower end of the base plate 105 is brought into contact with the building floor 5, the support leg 111 may not be used. When the support leg 111 is not used, it is not necessary to attach the support leg 111 to the back plate 114 or the like. That is, the support leg 111 may be provided as needed.

[0032] 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 to face each other. A pair of guide shafts 115 are arranged parallel to each other while connecting the upper plate 152 and the lower plate 157. The pair of guide shafts 115 are shafts for guiding the movement of the sliding stage 108.

[0033] In the height adjustment unit 103 having the above configuration, when the rod portion 107a expands and contracts according to 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. Further, the rotating shaft 109 and the arm support plate 150 are connected to the sliding stage 108. For this reason, 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. Thereby, the height adjustment unit 103 can adjust the height of the support arm 102 by the drive of the actuator 107.

[0034] (Front and rear tilt adjustment unit) The front-back tilt adjustment unit 104 corresponds to a tilt adjustment unit that adjusts the tilt of the support arm 102 with respect to the depth direction of the opening 4. The tilt of the support arm 102 with respect to the depth direction of the opening 4 is the tilt of the support arm 102 around the Y-axis, in other words, the tilt of the support arm 102 in the pitch direction. The front-back tilt adjustment unit 104 is attached to the sliding stage 108. The front-back tilt adjustment unit 104 includes a rotation shaft 109, an arm support plate 150, a pair of front-back tilt adjustment knobs 110, and a knob support plate 159. The rotation shaft 109 is a shaft 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-back tilt adjustment knobs 110 are attached to the knob support plate 159. Each front-back tilt adjustment knob 110 has a protruding portion 110a that protrudes upward from the knob support plate 159. The upper end portion of the protruding portion 110a abuts against the arm receiving portion 150a of the arm support plate 150 from below. Then, when the front-back tilt adjustment knob 110 is rotated, the protruding dimension of the protruding portion 110a changes according to the amount and direction of the rotation.

[0035] In the front-back tilt adjustment unit 104 configured as described above, when the pair of front-back tilt adjustment knobs 110 are rotated as appropriate, the arm support plate 150 rotates about the rotation axis 109 (fulcrum). For this reason, for example, as shown in FIG. 8, when the rotation of the pair of front-back tilt adjustment knobs 110 is operated so that the protruding portion 110a of the left front-back tilt adjustment knob 110 pushes up the arm receiving portion 150a of the arm support plate 150, the arm support plate 150 rotates clockwise. Although not shown, when the rotation of the pair of front-back tilt adjustment knobs 110 is operated so that the protruding portion 110a of the right front-back 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 tilt of the support arm 102 with respect to the depth direction (X-axis direction) of the opening 4 can be adjusted by appropriately operating the rotation of the pair of front-back tilt adjustment knobs 110.

[0036] (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 sandwiching the base plate 105 and the opening side portion 7 with a clamp 8 in a state where the inner surface 105a (see FIG. 6) of the base plate 105 is in close contact with the corner portion on the elevating path 6 side of the opening side portion 7. Thereby, the base plate 105 is attached vertically along the opening side portion 7.

[0037] (Horizontal position adjustment unit) The horizontal position adjuster 106 corresponds to an arm position adjuster 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"). In the width direction of the opening 4, the main purpose of adjusting the position of the support arm 102 is to align the position of the elongated hole 118 for fixing the support arm 102 to the floor plate with the position of the dust dropping hole 14 provided in the floor plate 1. The position of the dust dropping hole 14 in the longitudinal direction of the floor plate 1 may vary depending on the type and model number of the floor plate 1. Therefore, even when handling floor plates 1 with different types and model numbers, by appropriately adjusting the position of the support arm 102 with the horizontal position adjuster 106, it becomes possible to handle them with the common adjustment mechanism 101. However, the adjustment of the position of the support arm 102 in the width direction of the opening 4 may also be carried out for purposes other than those described above.

[0038] The horizontal position adjusters 106 are arranged in pairs vertically. The upper horizontal position adjuster 106 is attached to the upper plate 152, and the lower horizontal position adjuster 106 is attached to the lower plate 157. The upper and lower horizontal position adjusters 106 have a vertically symmetric structure when viewed from the Y-axis direction, but basically have the same configuration. Hereinafter, the configuration of the horizontal position adjuster 106 will be described in detail.

[0039] The horizontal position adjuster 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 portion of the horizontal shaft 112 is fixed to the base plate 105. The horizontal shaft 112 extends in a direction orthogonal 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 end portion of the horizontal shaft 112. The retaining member 164 is a member that restricts the movement range of the movable member 163 so that the movable member 163 does not come off the horizontal shaft 112. As the retaining member 164, a C-ring can be used.

[0040] The movable member 163 is a member that is fitted onto 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 is provided with a slotted portion 163a. The horizontal position adjustment knob 99 is attached to the slotted portion 163a of the movable member 163. The horizontal position adjustment knob 99 is provided with a male screw portion (not shown), and the movable member 163 is provided with a female screw (not shown). Then, the horizontal position adjustment knob 99 can tighten or loosen the horizontal shaft 112 by the engagement of the above-described male screw portion and female screw portion.

[0041] In the pair of upper and lower horizontal position adjustment portions 106 having the above configuration, by loosening the tightening of the horizontal position adjustment knob 99, the movable member 163 can be moved along the horizontal shaft 112. As a result, the back plate 114, the upper plate 152, the lower plate 157, the height adjustment portion 103, the front-rear inclination adjustment portion 104, etc. can be moved integrally with the upper and lower movable members 163. Therefore, the horizontal position of the support arm 102 can be adjusted. Also, by tightening the horizontal position adjustment knob 99, the horizontal position of the support arm 102 can be fixed.

[0042] Here, a temporary fixing method of the threshold 1 and the support arm 102 will be described with reference to FIGS. 9 and 10. FIG. 9 is a view of the state in which the threshold is supported by the support arm of the adjustment mechanism as seen obliquely from above, and FIG. 10 is a view of the state in which the threshold is supported by the support arm of the adjustment mechanism as seen obliquely from below. As shown in FIGS. 9 and 10, the threshold 1 is placed on the upper surface of the third arm portion 102c of the support arm 102. Further, the threshold 1 is temporarily fixed to the support arm 102 by a threshold temporary fixing tool 119. The temporary fixing of the threshold 1 means fixing the threshold 1 to the support arm 102 before fixing (final fixing) the threshold 1 to the wall surface 11 or the steel frame of the hoistway 6 using a plurality of brackets 2 as shown in FIG. 1. The threshold temporary fixing tool 119 corresponds to a fixing tool that fixes the threshold 1 to the third arm portion 102c of the support arm 102 through the dust removal hole 14 and the long hole 118 for threshold fixing. The threshold temporary fixing tool 119 temporarily fixes the threshold 1 to the support arm 102 by tightening 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 fixing tool 119 passes through the dust removal hole 14 of the threshold 1 and the long hole 118 for threshold fixing of the third arm portion 102c. The dust removal hole 14 is a long hole having the longitudinal direction of the threshold 1 as the major axis direction, and the long hole 118 for threshold fixing is a long hole having the direction along the short side direction of the threshold 1 as the major axis direction. Therefore, in a state where the threshold 1 is placed on the third arm portion 102c without tightening the threshold temporary fixing tool 119, the threshold 1 can be freely moved in the X-axis direction and the Y-axis direction within the dimensional ranges of the dust removal hole 14 and the long hole 118 for threshold fixing, which are both long holes.

[0043] (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 detachable 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 index plate 127. The unit base 125 is a plate-shaped member serving 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 index plate 127 are mounted on the unit base 125. The unit base 125 is mounted on the threshold 1 so as to cover it from above. Further, a set screw 126 is attached to the unit base 125, and by tightening this set screw 126, the unit base 125 is fixed to the threshold 1. Further, the control unit 120 can be removed from the threshold 1 by loosening the set screw 126.

[0044] The control board 121 is a circuit board for controlling the drive of the actuator 107 included in the pair of adjustment mechanisms 101 described above. Various electronic components including arithmetic elements such as a CPU that functions as a control unit 121a (see FIG. 13), connectors for inputting and outputting various signals, and connectors for taking in power are mounted on the control board 121. The control board 121 is attached to the unit base 125 via a plurality of board support rods 167. Further, the control board 121 is electrically connected to the control power supply 124 via a power supply wiring (not shown). Further, the control board 121 is electrically connected to the operation unit 122, the inclination sensor 123, and the actuator 107 via a signal wiring (not shown).

[0045] The operation unit 122 is for operating the actuator 107 of the height adjustment unit 103 and has three operation knobs 128a, 128b, and 128c. Further, the operation unit 122 has an upper panel 168a and a lower panel 168b. The upper panel 168a and the lower panel 168b are arranged to face 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. Also, the lower panel 168b is attached to the upper surface of the unit base 125.

[0046] The operation knob 128a is a knob for operating the actuator 107 of the adjustment mechanism 101 located on the left side when viewing the opening 4 from the side of the lifting path 6. The operation knob 128a is provided to be rotatable in both directions. When an operator rotates the operation knob 128a, an operation signal corresponding to the rotation direction and the rotation amount 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. Thereby, the rod portion 107a of the actuator 107 of the left adjustment mechanism 101 moves forward and backward according to the drive signal transmitted from the control unit 121a.

[0047] The operation knob 128b is a knob for switching the control mode for controlling the operations 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 an operator rotates the operation knob 128b in the first direction (for example, the clockwise direction), a first mode switching signal is sent from the operation knob 128b to the control unit 121a, and according to this first mode switching signal, the control unit 121a switches the control mode to the automatic horizontal control mode. Also, when the operation knob 128b is rotated in the second direction (for example, the counterclockwise direction), a second mode switching signal is sent from the operation knob 128b to the control unit 121a, and according to this second mode switching signal, the control unit 121a switches the control mode to the manual control mode.

[0048] The operation knob 128c is a knob for operating the actuator 107 of the adjustment mechanism 101 located on the right side when viewing the opening 4 from the side of the lifting path 6. 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 corresponding to the rotation direction and the amount of rotation 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 adjustment mechanism 101 on the right side 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 adjustment mechanism 101 on the right side. Thereby, the rod portion 107a of the actuator 107 of the adjustment mechanism 101 on the right side moves forward and backward according to the drive signal transmitted from the control unit 121a. Note that 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.

[0049] The tilt sensor 123 corresponds to a tilt detection unit that detects the tilt of the threshold 1 with respect to the width direction of the opening 4. The tilt of the threshold 1 with respect to the width direction of the opening 4 is the tilt of the threshold 1 around the X-axis, in other words, the tilt of the threshold 1 in the roll direction. The tilt sensor 123 is a sensor capable of detecting the tilt angle of the threshold 1 in the roll direction. The tilt angle of the threshold 1 in the roll direction becomes zero when the upper surface of the threshold 1 is parallel to the horizontal plane. The tilt sensor 123 is attached to the upper surface of the substrate 169. The upper surface of the substrate 169 is arranged parallel to the upper surface of the threshold 1 when the control unit 120 is attached to the threshold 1. The tilt sensor 123 is constituted by, for example, a three-axis acceleration sensor. The detection result of the tilt sensor 123 is sent to the control unit 121a. The detection result of the tilt sensor 123 is sent from the tilt sensor 123 to the control unit 121a as a tilt detection signal indicating the tilt angle of the threshold 1 in the roll direction.

[0050] 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.

[0051] The height indicator board 127 is a member that serves as an indicator when adjusting the height of the threshold 1. The height indicator board 127 is attached to the unit base 125 using the L-shaped plate 175 and the receiving member 176. The L-shaped plate 175 is attached to the upper surface of the unit base 125. The height indicator board 127 is attached to the L-shaped plate 175 in a state of standing vertically from the upper surface of the unit base 125. The height indicator board 127 is provided with a scale (not shown) so that the height dimension with respect to the upper surface of the threshold 1 (zero) can be visually confirmed when the control unit 120 is attached to the threshold 1. This scale is provided on the main surface of the height indicator board 127. The main surface of the height indicator board 127 is the surface irradiated with the horizontal laser beam 10 (see FIG. 17) emitted from the laser marker 9.

[0052] The height index 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. Also, the laser line marker 9 and the height index plate 127 constitute a height detection device for detecting the installation height of the threshold 1. The receiving member 176 is a member that receives and supports the lower end of the height index plate 127. A position adjustment knob 177 is attached to the attachment portion of the height index plate 127. The position adjustment knob 177 is a knob for adjusting the position of the height index plate 127 in the Z-axis direction. By providing this position adjustment knob 177, the position of the height index plate 127 can be adjusted so that the horizontal laser line 10 emitted from the laser line marker 9 irradiates the height index plate 127. The height index plate 127 can also be attached to the threshold 1 separately from the control unit 120.

[0053] FIG. 12 is a perspective view showing the configuration of the reference core index member. As shown in FIG. 12, the reference core index member 130 is a member that is attached to the threshold 1 for positioning the threshold 1 in accordance with the position of the reference core 3. The reference core index member 130 is attached to the threshold 1 in two pieces at a time. The two reference core index members 130 have a bilaterally symmetric structure when viewed from the X-axis direction, but basically have the same configuration. Hereinafter, the configuration of the reference core index member 130 will be described in detail.

[0054] The reference core index member 130 is fitted on the upper surface side of the threshold 1 so as to straddle one guide groove 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 index member 130 is provided with a notch 132 for aligning the reference core 3, a window portion 133 for aligning the opening scribing line 13, and a through hole 134. The notch 132 serves as an index 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 orthogonal to the longitudinal direction of the threshold 1. When attaching the reference core index member 130 to the threshold 1, the operator visually confirms the position of the opening scribing line 13 through the window portion 133, and adjusts the attachment position of the reference core index member 130 so that the opening scribing line 13 is positioned at the center in the width direction (the short axis direction of the long hole) of the window portion 133. The through hole 134 is a hole for attaching a fall prevention string, chain, etc. to the reference core index member 130 so that the reference core index member 130 does not accidentally fall to the bottom of the lifting path 6 during the attachment and detachment operation of the reference core index member 130 to and from the threshold 1.

[0055] By attaching the two reference core index members 130 having the above configuration to the threshold 1 in accordance with the positions of the corresponding opening scribing lines 13, the corner portions of the notches 132 in the respective reference core index members 130 become the index positions to be aligned with the reference core 3. Therefore, in any of the two reference core index members 130, as shown in FIG. 12, by adjusting the position of the threshold 1 so that the reference core 3 contacts the corner portion of the notch 132, the threshold 1 can be positioned in the horizontal plane.

[0056] FIG. 13 is a schematic diagram showing the system configuration of the threshold positioning device according to the first embodiment. In this specification, for convenience of explanation, the adjustment mechanism 101 located on the left side and its components when viewing the opening 4 from the side of the lifting path 6 are each marked with the symbol "L", and the adjustment mechanism 101 located on the right side and its components are each marked with the symbol "R".

[0057] As shown in FIG. 13, in the control unit 120, when the operation signal and the mode change signal are input from the operation unit 122 to the control unit 121a, the inclination detection signal is input from the inclination sensor 123 to the control unit 121a. Further, the control unit 121a gives the drive signal to the actuator 107L of the left adjustment mechanism 101L and also gives the drive signal to the actuator 107R of the right adjustment mechanism 101R. That is, the control unit 121a individually gives the drive signal to the left and right actuators 107L and 107R.

[0058] In addition, an encoder 129L is provided in the left adjustment mechanism 101L, and an encoder 129R is provided in the right adjustment mechanism 101R. The encoder 129L is a sensor that detects the rod displacement amount when the rod portion 107a of the actuator 107L moves forward and backward, and outputs a displacement detection signal, which is the detection result, to the control unit 121a. Similarly, the encoder 129R is a sensor that detects the rod displacement amount when the rod portion 107a of the actuator 107R moves forward and backward, and outputs a displacement detection signal, which is the detection result, to the control unit 121a. When the control unit 121a gives a drive signal to the actuator 107L, it determines 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 the control unit 121a gives a drive signal to the actuator 107R, it determines 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. That is, in the present embodiment, feedback control is adopted as a method for controlling the left and right actuators 107L and 107R. Note that the communication between the left and right adjustment mechanisms 101L and 101R and the control unit 120 may be realized by either wired or wireless means.

[0059] Subsequently, the control modes of the threshold positioning device 100 will be described. The control modes include a manual control mode and an automatic horizontal control mode.

[0060] FIG. 14 is a diagram showing a control loop when the manual control mode is applied. The manual control mode is a mode that independently controls the left and right adjustment mechanisms 101L and 101R. 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 regarding the rod displacement amount of the actuator 107R is sent from the encoder 129R to the control unit 121a, and based on this displacement detection signal, the control unit 121a controls the operation of the actuator 107R. 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 regarding the rod displacement amount of the actuator 107L is sent from the encoder 129L to the control unit 121a, and based on this displacement detection signal, the control unit 121a controls the operation of the actuator 107L.

[0061] FIG. 15 is a diagram showing a control loop when the automatic horizontal control mode is applied. The automatic horizontal control mode is a mode that controls one of the left and right adjustment mechanisms 101L and 101R as the master side (active side) and the other as the slave side (passive side). In this embodiment, as an example, the right adjustment mechanism 101R is set as the master side and the left adjustment mechanism 101L is set as the slave side. In the automatic horizontal control mode, for the right adjustment mechanism 101R on the master side, similar to the case of the manual control mode described above, the control unit 121a controls the operation of the actuator 107R according to the operation signal sent from the operation knob 128a. On the other hand, for the left adjustment mechanism 101L on 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 as 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. Thereby, the threshold 1 can always be maintained in a horizontal state when viewed from the X-axis direction. Note that 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.

[0062] (Threshold Installation Method) Subsequently, a threshold installation method using the threshold positioning device according to the first embodiment will be described with reference to the flowchart of FIG. 16. First, as shown in FIG. 17, the operator draws a finish line 16 downward by a specified dimension from the previously marked relief ink 15 (step S1). FIG. 17 is a view of the opening 4 before installing the threshold as seen from the landing side. The relief ink 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 construction. The floor surface after construction is a floor surface formed by laying a floor material or the like on the building floor 5 such as concrete. In that case, the operator draws the finish line 16 horizontally 1 m below the relief ink 15. The position of the finish line 16 indicates the position where the height of the upper surface of the threshold 1 should be adjusted in the Z-axis direction.

[0063] Next, as shown in FIG. 17, the operator places the laser alignment device 9 on the building floor 5 in front of the opening 4 and irradiates a horizontal laser beam 10 toward the opening 4 (step S2). Then, the operator measures the distance H between the finishing line 16 in the Z-axis direction and the horizontal laser beam 10 using a ruler or the like, and records the measurement result on a memo sheet, a mobile terminal, or the like (step S3). The distance H measured by the operator is used when adjusting the height of the threshold 1.

[0064] Subsequently, as shown in FIG. 2, the operator takes the threshold 1 with the three brackets 2 attached into the hoistway 6 (step S4). Each bracket 2 is attached at a position where it does not interfere with the positioning operation of the threshold 1. Note that the hoistway 6 is provided with a fixed scaffold or a work floor that can move up and down.

[0065] Next, the operator installs a pair of adjustment mechanisms 101 provided in the threshold positioning device 100 (step S5). At this time, as shown in FIG. 18, the operator fixes the base plate 105 to the left and right opening side portions 7 with clamps 8 respectively, thereby installing the pair of adjustment mechanisms 101 at the corresponding opening side portions 7. Further, the operator uses the position adjustment function of the horizontal position adjustment portion 106 to pull out the height adjustment portion 103 toward the center of the opening 4 to a position where the movable member 163 contacts the retaining member 164 so that the support arm 102 of the adjustment mechanism 101 does not contact the reference core 3.

[0066] Next, the operator places the threshold 1 captured in step S4 on the third arm portion 102c of the support arm 102 (step S6). At this time, if necessary, as shown in FIG. 19, the operator temporarily loosens the tightening of the arm position adjustment knob 116 and pulls out the support arm 102 toward the lifting path 6 side. When the support arm 102 is pulled out in this way, a space 26 can be secured between the third arm portion 102c of the support arm 102 and the opening 4. Therefore, it becomes 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 operator returns the support arm 102 pulled out as described above to its original position. Further, as shown in FIGS. 9 and 10, the operator temporarily attaches the threshold 1 to the support arm 102 using the threshold temporary fixing tool 119. At this time, the operator passes the screw shaft (not shown) of the threshold temporary fixing tool 119 through the dust removal hole 14 of the threshold 1 and the long hole 118 for threshold fixing of the third arm portion 102c, and attaches the threshold temporary fixing tool 119. Further, the operator loosely fixes the threshold temporary fixing tool 119 with a little play so that the threshold 1 can be moved on the third arm portion 102c.

[0067] Next, the operator installs the control unit 120 on the upper surface of the threshold 1 (step S7). Thus, the installation of the threshold positioning device 100 is completed (see FIG. 5). Thereafter, the process proceeds to the positioning operation of the threshold 1.

[0068] First, the operator adjusts the inclination of the support arm 102 with respect to the depth direction of the opening 4 by the front-rear inclination adjustment unit 104 (step S8). Specifically, the operator places a level on the upper surface of the threshold 1 and appropriately rotates the two front-rear inclination adjustment knobs 110 while checking the position of the bubble of the level. Then, the operator adjusts the rotation amount of the front-rear inclination adjustment knob 110 so that the inclination angle of the support arm 102 with respect to the depth direction of the opening 4 becomes zero. This adjustment work is performed in parallel by the pair of adjustment mechanisms 101.

[0069] Next, after the operator turns on the power supplies 113 and 124 of each part of the threshold positioning device 100, the operator operates the operation knob 128b with the operation unit 122 to enable (turn on) the automatic level control mode (step S9). When the automatic level control mode is enabled, as described with reference to FIG. 15 above, the control unit 121a controls the operation of the actuator 107L based on the inclination detection signal from the inclination sensor 123. Therefore, when viewed from the X-axis direction, the threshold 1 is horizontally supported by the left and right support arms 102.

[0070] Next, the operator operates the operation knob 128a with 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 this time, first, the operator measures how far the horizontal laser beam 10 irradiated from the laser marker 9 onto the height index plate 127 is away from the upper surface of the threshold 1 by reading the scale attached to the height index plate 127. Next, the operator compares the distance measured using the height index plate 127 with the previously recorded distance L (see FIG. 17), and operates the operation knob 128a so that the difference between these distances becomes zero. Thereby, in the height direction of the opening 4, the upper surface of the threshold 1 supported by the support arms 102 can be aligned with the position of the finish line 16 (see FIG. 17). Further, since the control mode is the automatic level control mode, the height of the threshold 1 can be adjusted while maintaining the threshold 1 in a horizontal state when viewed from the X-axis direction.

[0071] When the height of the threshold 1 is thus determined, the operator operates the operation knob 128b to disable (turn off) the automatic level control mode (step S11). As a result, the movements of the actuators 107L and 107R both stop.

[0072] Through the positioning operation of the threshold 1 described above, 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 are completed. At the stage where the positioning operation of the threshold 1 is completed in this way, the threshold 1 is horizontally supported by the left and right support arms 102. Also, the upper surfaces of the third arm portions 102c of the left and right support arms 102 are arranged in 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.

[0073] Next, the operator adjusts the position of the threshold 1 on the above horizontal plane (step S12). Specifically, as shown in FIGS. 5 and 12, the operator attaches a reference core index member 130 to a predetermined position (on the left and right opening scribing lines 13) of the threshold 1 as an index for adjusting the position of the threshold 1. Next, the operator appropriately moves the threshold 1 supported by the left and right support arms 102 on the third arm portion 102c so that the notch portions 132 of the left and right reference core index members 130 are brought into contact with the corresponding reference cores 3. Thereby, 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 are adjusted. Thus, the positioning of the threshold 1 is completed.

[0074] Next, the operator temporarily fixes the threshold 1 to the support arm 102 by tightening the threshold temporary fixing tool 119 so that the threshold 1 positioned as described above does not shift (step S13). Thereafter, the process proceeds to the fixing operation of the threshold 1.

[0075] First, the operator appropriately loosens the fasteners 12 attached to the bracket 2 and the fasteners 24 attaching the bracket 2 to the threshold 1, brings the wall-side bracket 2a of each bracket 2 into close contact with the wall surface 11 of the lifting path 6, and fixes the wall-side bracket 2a to the wall surface 11 by means of anchor bolts or welding or the like (step S14). When fixing the wall surface 11 to the steel frame by means of the bracket 2, the wall-side bracket 2a is brought into close contact with the steel frame and fixed.

[0076] Next, the operator tightens the above-described fasteners 12 and 24 to fix the threshold-side bracket 2b to the threshold 1 and also fix the threshold-side bracket 2b to the wall-side bracket 2a (step S15). Thus, the installation work of the threshold is completed.

[0077] Thereafter, the operator removes the threshold positioning device 100 from the threshold 1 (step S15). The removal work of the threshold positioning device 100 is performed, for example, according to the following procedure. First, the operator removes the threshold temporary fixing tool 119. Next, the operator loosens the tightening of the arm position adjustment knob 116. Next, the operator removes the clamp 8 while holding down the base plate 105 by hand. Next, the operator removes the adjustment mechanism 101 from the threshold 1 and the opening side portion 7 while taking care not to strongly hit the support arm 102 against the threshold 1. The operator removes the left and right adjustment mechanisms 101 in order according to the above procedure. Next, the operator removes the control unit 120 from the threshold 1. The above is a series of procedures for the installation method of the threshold 1.

[0078] As described above, the threshold positioning device 100 according to the first embodiment includes a pair of adjustment mechanisms 101. Each adjustment mechanism 101 has 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 inclination adjustment unit 104 that adjusts the inclination of the support arm 102 with respect to the depth direction of the opening 4. Therefore, an operator performing the threshold installation work can adjust the position of the threshold 1 by using the adjustment functions of the height adjustment unit 103 and the front-rear inclination adjustment unit 104. Thereby, the position adjustment of the threshold 1 can be performed more easily than in the past. As a result, the time required for the threshold installation work can be shortened. Further, at the stage of fixing the bracket 2 to the wall surface 11 of the hoistway 6, since the vertical and horizontal positions of the threshold 1 are already determined, it is only necessary to fix the bracket 2 at the place where it is pressed against the wall surface 11. For this reason, the scribing work for the attachment position of the bracket 2, which was necessary in the past, becomes unnecessary. Furthermore, in the threshold positioning device 100 according to the first embodiment, the pair of adjustment mechanisms 101 are configured to be installable side by side in the width direction of the opening 4. Thereby, even when, for example, a groove for passing rainwater is formed in the building floor 5, the threshold positioning device 100 can be used without being affected by the uneven state of the building floor 5.

[0079] Further, in the first embodiment, the pair of adjustment mechanisms 101 are configured to be attached to the left and right opening side portions 7. For this reason, there is an advantage that the adjustment mechanism 101 is less likely to be in the way when viewed from an operator entering and exiting the opening 4.

[0080] Further, in the first embodiment, each of the pair of adjustment mechanisms 101 has a horizontal position adjustment unit 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 long hole 118 for fixing the threshold of the support arm 102 coincides with the position of the dust removal hole 14 of the threshold 1.

[0081] Also, 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 includes an inclination sensor 123 that detects the inclination of the threshold 1 with respect 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. Thereby, even if a level or the like is not installed on the upper surface of the threshold 1, the height of the threshold 1 can be adjusted while maintaining the threshold 1 in a horizontal posture.

[0082] Also, in the first embodiment, the height detection device includes a laser marker 9 that emits a horizontal laser beam 10, and a height index plate 127 that can measure the distance from the upper surface of the threshold 1 supported by the support arm 102 to the horizontal laser beam 10 when irradiated with the horizontal laser beam 10 emitted from the laser marker 9. Thereby, while confirming the height of the threshold 1 using the height index plate 127, the height of the threshold 1 can be adjusted by the height adjustment unit 103.

[0083] Also, in the first embodiment, each of the pair of adjustment mechanisms 101 has an arm position adjustment mechanism (elongated hole 117 for fixing the arm, arm support plate 150, arm position adjustment knob 116) for adjusting the position of the support arm 102 in the depth direction of the opening 4. Thereby, the position of the support arm 102 can be adjusted so that the threshold 1 can be easily placed on the support arm 102.

[0084] Also, the threshold positioning device 100 according to the first embodiment includes a threshold temporary fixing tool 119 that fixes the threshold 1 to the third arm portion 102c through the dust removal hole 14 of the threshold 1 and the elongated hole 118 for fixing the threshold of the support arm 102. Thereby, it is possible to prevent the threshold 1 from falling off the support arm 102 during the positioning operation. Also, it is possible to suppress the displacement of the threshold 1 after the positioning is completed.

[0085] Further, 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 contact the building floor 5. Thereby, even when the base plate 105 is attached so as to float from the building floor 5, the installation work of the adjustment mechanism 101 can be easily performed. Further, even after the adjustment mechanism 101 is installed, the posture of the adjustment mechanism 101 can be stabilized.

[0086] Further, the threshold positioning device 100 according to the first embodiment 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. Thereby, it is not necessary to manually adjust the height of the threshold 1.

[0087] Further, in the threshold installation method according to the first embodiment, after positioning the threshold 1 using the threshold positioning device 100, the threshold 1 is fixed to the wall surface 11 of the building using the bracket 2. Thereby, the threshold 1 can be positioned without causing a positional interference between the threshold 1 and the bracket 2.

[0088] <Second Embodiment> FIG. 20 is a view of the threshold positioning device according to the second embodiment as viewed from the elevator side. The threshold positioning device 140A according to the second embodiment includes a pair of adjustment mechanisms 141L and 141R. The pair of adjustment mechanisms 141L and 141R have the same mechanism except that they include control boxes 142 and 144 and operation knobs 143 and 145 as compared with the pair of adjustment mechanisms 101 described above. Therefore, detailed description of each of the adjustment mechanisms 141L and 141R is omitted. Note that the operation knobs 143 and 145 function as operation units.

[0089] The threshold positioning device 140A according to the second embodiment is different from the threshold positioning device 100 according to the first embodiment in that the control unit 120 installed on the upper surface of the threshold 1 is eliminated, and instead, a control box 142 and an operation knob 143 are incorporated into the left adjustment mechanism 141L, and a control box 144 and an operation knob 145 are incorporated into the right adjustment mechanism 141. Although not shown in FIG. 20, for example, the control box 142 incorporates a control unit for controlling the actuator included in the left adjustment mechanism 141L, and the control box 144 incorporates a control unit for controlling the actuator included in the right adjustment mechanism 141R.

[0090] FIG. 21 is a schematic diagram showing the system configuration of the threshold positioning device according to the second embodiment. As shown in FIG. 21, the left adjustment mechanism 141L and the right adjustment mechanism 141R have independent system configurations. Specifically, the left adjustment mechanism 141L has a control unit 142a built into the above-described control box 142. The control unit 142a controls the actuator 147L based on the operation signal from the operation knob 143. The power supply 113L supplies power to the control unit 142a, the actuator 147L, and the encoder 148L, respectively. On the other hand, the right adjustment mechanism 141R has a control unit 144a built into the above-described control box 144. The control unit 144a controls the actuator 147R based on the operation signal from the operation knob 145. The power supply 113R supplies power to the control unit 144a, the actuator 147R, and the encoder 148R, respectively.

[0091] Here, in the threshold positioning device 100 according to the first embodiment, the tilt sensor 123 is provided in the control unit 120 installed on the threshold 1, but the threshold positioning device 140A according to the second embodiment does not include the tilt sensor 123. Therefore, when adjusting the inclination of the threshold 1 in the roll direction, the operator installs a level on the upper surface of the threshold 1 and operates the left and right operation knobs 143 and 145 while visually checking the position of the bubble in the level.

[0092] As described above, the threshold positioning device 140A according to the second embodiment is configured such 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 the control unit 120 and the left and right adjustment mechanisms 101 communicate with each other by wire, it is necessary to route the wiring. However, in the threshold positioning device 140A according to the second embodiment, such wiring is unnecessary. Therefore, according to the threshold positioning device 140A according to the second embodiment, the installation and handling of the device are simplified.

[0093] <Modification examples etc.> Note that the present invention is not limited to the above-described embodiments and includes various modification examples. For example, in the above-described embodiments, the present invention has been described in detail for easy understanding of the content of the present invention. However, the present invention is not limited to those that necessarily include all the configurations described in the above-described embodiments. Also, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment. Further, it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Also, for a part of the configuration of each embodiment, it is possible to delete this, add another configuration, or replace it with another configuration.

[0094] For example, in the first embodiment, the electric actuator 107 is used for the height adjustment unit 103 of the adjustment mechanism 101, but this may be replaced with a manual operation. Further, the height adjustment unit 103 may be configured to move the sliding stage 108 up and down by a ball screw with an adjustment knob. Also, in the first embodiment, as the configuration of the front and rear tilt adjustment unit 104, the arm support plate 150 is rotated about the rotation axis 109 by rotating two front and rear tilt adjustment knobs 110 by manual operation of an operator. However, a configuration in which the front and rear tilt adjustment unit 104 is operated electrically may be adopted.

[0095] Further, it is also possible to make the longitudinal dimension of the elongated hole 117 for arm fixation of the support arm 102 longer than the length shown in FIG. 6 and expand the movable range of the support arm 102 in the X-axis direction. When the elongated hole 117 for arm fixation is made longer in this way, the support arm 102 can be pushed into the landing side. As a result, the support arm 102 can be retracted from the lifting path 6, so that there is no obstacle between the opening 4 and the reference core 3. Therefore, the work of inserting the threshold 1 between the opening 4 and the reference core 3 becomes easier.

[0096] Also, in the above first embodiment, one base plate 105 is fixed to the opening side portion 7 with one clamp 8, but the present invention is not limited to this, and one base plate 105 may be fixed to the opening side portion 7 with a plurality (for example, two) of clamps 8.

Explanation of reference numerals

[0097] 1... Threshold, 2... Bracket, 3... Reference core, 4... Opening, 5... Building floor, 6... Lifting path, 7... Opening side portion, 9... Laser marking device (height detection device), 10... Horizontal laser beam, 11... Wall surface, 14... Dust hole, 100, 140A... Threshold positioning device, 101, 141L, 141R... Adjusting mechanism, 102... Support arm, 102c... Third arm portion (arm portion), 103... Height adjustment portion, 104... Front and rear tilt adjustment portion (tilt adjustment portion), 105... Base plate (base member), 106... Horizontal position adjustment portion (arm position adjustment portion), 107, 147L, 147R... Actuator, 111... Support leg, 116... Arm position adjustment knob (arm position adjustment mechanism), 117... Elongated hole for arm fixation (arm position adjustment mechanism), 118... Elongated hole for threshold fixation (elongated hole), 119... Threshold temporary fixture (fixture), 121a, 142a, 144a... Control unit, 122... Operation unit, 123... Tilt sensor (tilt detection portion), 127... Height index plate (height detection device), 143, 145... Operation knob (operation unit), 150... Arm support plate (arm position adjustment mechanism)

Claims

1. A threshold positioning device for positioning a threshold installed at an opening of an elevator hoistway, comprising: 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, and includes a pair of adjustment mechanisms; the pair of adjustment mechanisms are configured to be installed side by side in the 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; a threshold positioning device.

2. Each of the pair of adjustment mechanisms has an arm position adjustment unit that adjusts the position of the support arm in the width direction of the opening. The threshold positioning device according to claim 1.

3. The height adjustment unit has an actuator for changing the height of the support arm, an inclination detection unit that detects the inclination of the threshold with respect to the width direction of the opening, and a control unit that controls the actuator based on the detection result of the inclination detection unit. The threshold positioning device according to claim 1.

4. A height detection device for detecting the installation height of the threshold is provided, the height detection device includes a laser level that emits a horizontal laser beam, and a height index plate that is irradiated with the horizontal laser beam emitted from the laser level and can measure the distance from the upper surface of the threshold supported by the support arm to the horizontal laser beam. The threshold positioning device according to claim 1.

5. 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 positioning device according to claim 1.

6. The threshold has a dust removal hole, the support arm has a long hole in the arm portion on which the threshold is placed, and a fixture for fixing the threshold to the arm portion through the dust removal hole and the long hole. The threshold positioning device according to claim 1.

7. 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 in contact with the building floor. The threshold positioning device according to claim 1.

8. 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, and a control unit that controls the actuator based on an operation signal from the operation unit. The threshold positioning device according to claim 1.

9. A threshold installation method using the threshold positioning device according to claim 1, After positioning the threshold using the threshold positioning device, fixing the threshold to the wall surface or steel frame of the building using brackets Threshold installation method.

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