Elevator guide rail centering jig

Abstract

To efficiently and safely adjust the installation position of a guide rail when it is installed in a hoistway.SOLUTION: A centering jig used to adjust the installation position of a guide rail in a hoistway with reference to a reference line stretched in the hoistway and extending in the vertical direction comprises a jig body that is detachably fixed to the guide rail, a first laser irradiation unit provided on the jig body, for irradiating a first visible laser beam, and a second laser irradiation unit provided on the jig body, for irradiating a second visible laser. The first laser irradiation unit and the second laser irradiation unit are arranged so that the first visible light laser and the second visible light laser are perpendicular to each other at a position corresponding to the reference line when viewed from vertically above.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a centering jig used to adjust the installation position of guide rails that guide the elevation of a car or counterweight within an elevator shaft when the guide rails are installed within the shaft. [Background technology]

[0002] Conventionally, when installing guide rails in an elevator shaft, a centering operation is performed in which piano wires are hung vertically from several reference positions set at the top of the elevator shaft, and the installation position of the guide rails is adjusted using these piano wires as references.

[0003] As an example of a centering jig used in this centering work, Patent Document 1 discloses a method in which a member detachably fixed to a guide rail is provided with a notch for receiving a piano wire that serves as a positioning reference, and the position of the guide rail is adjusted so that the piano wire fits into the notch. Patent Document 1 also illustrates the provision of multiple scribe lines extending in the front-to-back and left-to-right directions around the notch. After adjusting the position of the guide rail so that the piano wire fits into the notch, a worker performing the centering work using this centering jig looks around the area from the front-to-back and left-to-right directions, and then further adjusts the position of the guide rail so that the piano wire aligns with each scribe line, thereby determining the installation position of the guide rail. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-75209 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, the inside of a hoistway where centering work is performed is generally dimly lit, making it difficult to see the marking lines. However, the centering jig disclosed in Patent Document 1 requires the worker to repeatedly visually check the relative positions of the marking lines and the piano wire, resulting in poor workability. Furthermore, while centering work is often performed on temporary scaffolding, the centering jig disclosed in Patent Document 1 requires the worker to look into the vicinity of the cutout from the front, back, and left and right directions, which requires the worker to change posture significantly during the work, leaving room for improvement in terms of safety.

[0006] Therefore, an object of the present disclosure is to provide a centering jig that can more efficiently and safely adjust the installation position of a guide rail when installing it in a hoistway. [Means for solving the problem]

[0007] The centering jig for an elevator guide rail according to the present disclosure is a centering jig used when adjusting the installation position of a guide rail in an elevator shaft based on a reference line that is stretched within the elevator shaft and extends vertically, and includes a jig main body that is detachably fixed to the guide rail, a first laser irradiation unit that is provided on the jig main body and irradiates a first visible light laser, and a second laser irradiation unit that is provided on the jig main body and irradiates a second visible light laser, and the first laser irradiation unit and the second laser irradiation unit are arranged so that the first visible light laser and the second visible light laser are perpendicular to each other at a position corresponding to the reference line when viewed from vertically above. The first laser irradiation means and the second laser irradiation means are arranged so that the first visible light laser and the second visible light laser pass through positions offset from each other on a vertical line corresponding to the reference line. [Effects of the Invention]

[0008] The centering jig for elevator guide rails according to the present disclosure makes it possible to more efficiently and safely adjust the installation position of a guide rail when installing it in a hoistway. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a plan view showing a state in which the centering jig according to the first embodiment is fixed to a guide rail. FIG. [Figure 2] 1 is an enlarged perspective view of a portion of a centering jig according to a first embodiment. FIG. [Figure 3] FIG. 3 is a plan view of part A in FIG. 2 as seen from vertically above. [Figure 4] FIG. 3 is an enlarged perspective view of part A in FIG. 2. [Figure 5] FIG. 10 is an enlarged perspective view of a portion of a centering jig according to a modified example of the first embodiment. [Figure 6] FIG. 10 is a plan view showing a state in which the centering jig according to the second embodiment is fixed to a guide rail. DETAILED DESCRIPTION OF THE INVENTION

[0010] [First embodiment] The following describes an elevator guide rail centering jig 1 according to a first embodiment. Fig. 1 is a plan view showing the centering jig 1 fixed to the guide rail. Fig. 2 is an enlarged perspective view of a portion of the centering jig 1. The centering operation is performed by moving a pair of guide rails R1, R2, which are held at a predetermined distance by the centering jig 1, to predetermined positions based on reference lines W1, W2.

[0011] 1 and 2, the centering jig 1 includes a slender rectangular tubular main rod 10 whose length is set to match the distance between a pair of opposing guide rails R1 and R2, and a pair of base portions 20, 20 detachably fixed to both ends of the main rod 10. One of the pair of base portions 20, 20 is detachably fixed to the guide rail R1, and the other is detachably fixed to the guide rail R2. In this first embodiment, the main rod 10 and the pair of base portions 20, 20 correspond to the jig body of the present disclosure.

[0012] Each base portion 20 is provided with a first reference surface 20a that comes into close contact with the braking surface Ra of the guide rail R1 (or guide rail R2), and a second reference surface 20b that comes into close contact with the tip surface Rb of the guide rail R1 (or guide rail R2). Each base portion 20 is also provided with a cutout 23 that can receive the reference line W1 (or reference line W2), and a swing arm 25 whose base end is swingably supported by a support shaft 24. A screw shaft 27 whose base end is swingably supported by a support shaft 26 is provided at the tip of this swing arm 25, and a block 28 that engages with the edge of the guide rail R1 (or guide rail R2) on the side opposite to the surface that comes into close contact with the first reference surface, and a nut 29 for fixing the block 28 to the guide rail R1 (or guide rail R2) are attached to the screw shaft 27.

[0013] With this configuration, when fixing the base portion 20 to the guide rail R1 (or guide rail R2), the braking surface Ra and the tip surface Rb of the guide rail R1 (or guide rail R2) are brought into close contact with the first reference surface 20a and the second reference surface 20b of the base portion 20, and then the swing arm 25 and the screw shaft 27 are swung to bring the piece 28 into contact with the opposite edge of the guide rail R1 (or guide rail R2), as shown by the dotted line in Figure 1, and the nut 29 is tightened to fix the piece 28.

[0014] Each base portion 20 is provided with a first laser irradiation unit 31 that irradiates a first visible light laser and a second laser irradiation unit 32 that irradiates a second visible light laser near the cutout 23. FIG. 3 is a plan view of the vicinity of the cutout 23 (area A in FIG. 2) viewed vertically from above. As shown in FIG. 3, the first laser irradiation unit 31 and the second laser irradiation unit 32 are arranged so that the first visible light laser 31a and the second visible light laser 3Ra are perpendicular to each other at position P1 corresponding to the reference line W1 when viewed vertically from above. FIG. 3 shows an example in which the first laser irradiation unit 31 is arranged on the base portion 20 at a predetermined distance forward from position P1, facing toward position P1, and the second laser irradiation unit 32 is arranged on the base portion 20 at a predetermined distance to the right of position P1, facing toward position P1.

[0015] With this arrangement, when the reference line W1 is located at position P1, both the first visible light laser 31a and the second visible light laser 3Ra hit the reference line W1, and their laser beams are visible. On the other hand, when the reference line W1 is located at a position other than position P1, the following three patterns can be identified: (1) When the reference line W1 is located on the optical path of the first visible light laser 31a (excluding position P1), only the first visible light laser 31a hits the reference line W1, and its laser beam is visible. (2) When the reference line W1 is located on the optical path of the second visible light laser 3Ra (excluding position P1), only the second visible light laser 3Ra hits the reference line W1, and its laser beam is visible. (3) In other cases, neither the first visible light laser 31a nor the second visible light laser 3Ra hits the reference line W1, and their laser beams are not visible.

[0016] 4 is an enlarged perspective view of the vicinity of the notch 23 (portion A in FIG. 2). As shown in FIG. 4, the first laser irradiation unit 31 and the second laser irradiation unit 32 are arranged so that the first visible light laser 31a and the second visible light laser 3Ra pass at approximately the same position on a vertical line L1 corresponding to the reference line W1. Furthermore, the first laser irradiation unit 31 and the second laser irradiation unit 32 are used to irradiate visible light lasers of different colors. For example, when the first laser irradiation unit 31 is used to irradiate a red visible light laser, the second laser irradiation unit 32 is used to irradiate a visible light laser of another color, such as green or blue.

[0017] As a result, the first visible light laser 31a and the second visible light laser 3Ra have different colors, and when either or both of the first visible light laser 31a and the second visible light laser 3Ra are incident on the reference line W1, it is possible to recognize whether only one of the laser beams is incident or both are incident, and if only one of the laser beams is incident, it is possible to recognize which laser beam is incident, based on the color and number of laser beams that appear on the reference line W1. For example, when the first visible light laser 31a is red and the second visible light laser 3Ra is blue, when both the red and blue laser beams are visible on the reference line W1, it can be recognized that both laser beams are incident, and when only the blue laser beam is visible, it can be recognized that only the second visible light laser 3Ra is incident.

[0018] When an operator performs centering work using the centering jig 1 configured as described above, he or she first checks the positions of the reference lines W1 and W2 and moves the guide rails R1 and R2 (hereinafter referred to as the guide rail set) held at a predetermined distance by the centering jig 1, thereby bringing the cutout 23 of one base portion 20 fixed to the guide rail R1 closer to the reference line W1, and bringing the cutout 23 of the other base portion 20 fixed to the guide rail R2 closer to the reference line W2.

[0019] Next, the guide rail set is moved finely back and forth and left and right using the reference line W1 as a reference to find the position of the guide rail set where at least one of the first visible light laser 31a and the second visible light laser 3Ra is hitting the reference line W1. Next, which laser light is hitting the reference line W1 is identified based on the color and number of laser lights hitting the reference line W1, and the guide rail set is further moved finely back and forth when only the first visible light laser 31a is hitting the reference line W1, or left and right when only the second visible light laser 3Ra is hitting the reference line W1, to find the position of the guide rail set where both the first visible light laser 31a and the second visible light laser 3Ra are hitting the reference line W1.

[0020] Next, while maintaining the above state, i.e., the state where both laser beams are irradiating the reference line W1, the guide rail set is appropriately displaced to find the position of the guide rail set where at least one of the first visible light laser 31a and the second visible light laser 3Ra is irradiating the reference line W2. Next, which laser beam is irradiating the reference line W2 is identified based on the color and number of the laser beams irradiating the reference line W2, and while maintaining the above state as much as possible, the guide rail set is further displaced in the front-to-back direction when only the first visible light laser 31a is irradiating the reference line W2, or in the left-to-right direction when only the second visible light laser 3Ra is irradiating the reference line W2, to find the position of the guide rail set where both the first visible light laser 31a and the second visible light laser 3Ra are irradiating the reference line W2.

[0021] Finally, by further adjusting the position of the guide rail set while simultaneously or sequentially checking the state in which the laser light is shining on each reference line W1, W2, the position of the guide rail set is found where the corresponding first visible light laser 31a and second visible light laser 3Ra are shining on each of the reference lines W1, W2, and this position is set as the installation position (centered position) of the guide rails R1, R2.

[0022] As described above, the elevator guide rail centering jig 1 according to the first embodiment is provided with a first laser irradiation unit 31 that emits a first visible light laser and a second laser irradiation unit 32 that emits a second visible light laser. Furthermore, the first laser irradiation unit 31 and the second laser irradiation unit 32 are arranged so that the first visible light laser 31a and the second visible light laser 3Ra are perpendicular to each other at a position corresponding to the reference line when viewed vertically from above. This allows the worker to perform centering work to adjust the installation positions of the guide rails R1 and R2 by referring to how the laser light strikes the reference lines W1 and W2. In particular, how the laser light strikes the reference lines W1 and W2 can be easily seen even from a short distance away in a dimly lit elevator shaft, allowing the centering work to be performed efficiently and safely.

[0023] Furthermore, the first laser irradiation unit 31 and the second laser irradiation unit 32 are used to irradiate visible light lasers of different colors. This makes it easy to recognize, based on the color and number of laser beams striking the reference line W1 (or reference line W2), whether only one or both of the first visible light laser 31a and the second visible light laser 3Ra are striking the reference line W1 (or reference line W2), and if only one is striking the reference line W1 (or reference line W2), which laser beam is striking the reference line W1 (or reference line W2).

[0024] [Modification of the first embodiment] An elevator guide rail centering jig 2 according to a modified example of the first embodiment will now be described. FIG. 5 is an enlarged perspective view of a portion of the centering jig 2. As shown in FIG. 5, this modified example differs from the first embodiment in that the first laser irradiation unit 31 and the second laser irradiation unit 32 emit visible lasers of the same color, and that a raising platform 33 is added between the second laser irradiation unit 32 and the base unit 20, thereby shifting the irradiation position of the second visible laser vertically upward by the height of the raising platform 33. As a result, the first laser irradiation unit 31 and the second laser irradiation unit 32 are arranged such that the first visible laser 31a and the second visible laser 3Ra pass at positions offset from each other on a vertical line L1 corresponding to the reference line. The height of the raising platform 33 can be set arbitrarily, approximately within a range of 10 to 15 mm.

[0025] With this configuration, when both the first visible light laser 31a and the second visible light laser 3Ra are incident on the reference line W1 (or reference line W2), the laser beams can be seen at two locations separated by a gap above and below the reference line W1 (or reference line W2). On the other hand, when only the first visible light laser 31a is incident, the laser beam can be seen at one location below, and when only the second visible light laser 3Ra is incident, the laser beam can be seen at one location above. As a result, when either or both of the first visible light laser 31a and the second visible light laser 3Ra are incident on the reference line W1, the worker performing the centering work can recognize, based on the positions and number of laser beams that appear on the reference line W1, whether only one laser beam is incident or both, and, if only one laser beam is incident, which laser beam is incident. Then, by referring to the state in which the laser light strikes the reference lines W1 and W2, a centering operation can be performed to adjust the installation positions of the guide rails R1 and R2.

[0026] In the above modification of the first embodiment, the first laser irradiation unit 31 and the second laser irradiation unit 32 are described as emitting visible light lasers of the same color, but they may emit visible light lasers of different colors. In this case, when either the first visible light laser 31a or the second visible light laser 3Ra hits the reference line W1 (or the reference line W2), it is easier to recognize which laser light is hitting the reference line W1 based on both the position and color of the laser light that appears on the reference line W1.

[0027] [Second embodiment] The elevator guide rail centering jig 3 according to the second embodiment will be described below. Fig. 6 is a plan view showing the state in which the centering jig 3 is fixed to the guide rail. In the second embodiment, the centering work is performed by moving one guide rail R3 to which the centering jig 3 is fixed to a predetermined position based on reference lines W3 and W4. The reference lines W3 and W4 are stretched at predetermined positions spaced apart on either side of the position where the guide rail R3 should be installed.

[0028] As shown in Fig. 6, the centering jig 3 includes a base portion 120 that is detachably fixed to the guide rail R3. The base portion 120 is provided with a first reference surface 20a that comes into close contact with the braking surface of the guide rail R3, and a second reference surface 20b that comes into close contact with the tip surface of the guide rail R3. The base portion 120 is also provided with a swing arm 25, the base end of which is swingably supported by a support shaft 24. The tip of the swing arm 25 is provided with a screw shaft 27, the base end of which is swingably supported by a support shaft 26. The screw shaft 27 is provided with a block 28 that engages with the edge of the guide rail R3 on the side opposite to the surface that comes into close contact with the guide rail R3, and a nut 29 for fixing the block 28 to the guide rail R3.

[0029] With this configuration, when fixing the base portion 120 to the guide rail R3, the braking surface and tip surface of the guide rail R3 are brought into close contact with the first reference surface 20a and the second reference surface 20b of the base portion 120, and the swing arm 25 and the screw shaft 27 are swung to bring the piece 28 into contact with the opposite edge of the guide rail R3, and the nut 29 is tightened to fix the piece 28.

[0030] 6, the base portion 120 is provided with a first cutout 123 capable of receiving the reference line W3 and a second cutout 223 capable of receiving the reference line W4. The base portion 120 is also provided with a first laser irradiation unit 31 that irradiates a first visible light laser and a second laser irradiation unit 32 that irradiates a second visible light laser near the first cutout 123 and the second cutout 223, respectively. The first laser irradiation unit 31 and the second laser irradiation unit 32 are arranged so that the first visible light laser and the second visible light laser are perpendicular to each other at a position corresponding to the reference line W3 (or the reference line W4) when viewed from vertically above.

[0031] Furthermore, the first laser irradiation unit 31 and the second laser irradiation unit 32 are used to irradiate visible light lasers of different colors. For example, if the first laser irradiation unit 31 irradiates a red visible light laser, the second laser irradiation unit 32 is used to irradiate a visible light laser of another color, such as green or blue. As a result, the colors of the first visible light laser and the second visible light laser are different, and when either or both of the first visible light laser and the second visible light laser hit the reference line W3 (or the reference line W4), it is possible to recognize whether only one laser light or both laser lights are hitting the reference line W3 (or the reference line W4) based on the color and number of laser lights appearing on the reference line W3 (or the reference line W4), and if only one laser light is hitting the reference line W3 (or the reference line W4), it is also possible to recognize which laser light is hitting the reference line W3 (or the reference line W4). For example, if the first visible light laser is red and the second visible light laser is blue, when both red and blue are visible on the reference line W1, it can be recognized that both laser lights are shining, and when only blue is visible, it can be recognized that only the second visible light laser is shining.

[0032] When an operator performs centering work using the centering jig 3 configured as described above, he or she first checks the positions of the reference lines W3 and W4 and moves the guide rail R3 (hereinafter referred to as the guide rail set) to which the centering jig 3 is fixed, thereby bringing the first notch 123 of the base portion 120 closer to the reference line W3 and bringing the second notch 223 closer to the reference line W4.

[0033] Next, the position of the guide rail set where at least one of the first visible light laser and the second visible light laser is incident on the reference line W3 is found while the guide rail set is moved finely back and forth and left and right based on the reference line W3. Next, which laser light is incident on the reference line W3 is identified based on the color and number of laser lights incident on the reference line W3, and the guide rail set is further finely moved back and forth when only the first visible light laser is incident on the reference line W1, or left and right when only the second visible light laser is incident on the reference line W1, to find the position of the guide rail set where both the first visible light laser and the second visible light laser are incident on the reference line W3.

[0034] Next, while maintaining the above state, i.e., the state where both laser beams are incident on reference line W3, the guide rail set is appropriately displaced to find the position of the guide rail set where at least one of the first visible light laser and the second visible light laser is incident on reference line W4. Next, which laser beam is incident on reference line W4 is identified based on the color and number of laser beams incident on reference line W4, and the guide rail set is further displaced in the forward / backward direction when only the first visible light laser is incident on reference line W4, or in the left / right direction when only the second visible light laser is incident on reference line W4, while maintaining the above state as much as possible, to find the position of the guide rail set where both the first visible light laser and the second visible light laser are incident on reference line W4.

[0035] Finally, by further adjusting the position of the guide rail set while simultaneously or sequentially checking the state in which the laser light is shining on each of the reference lines W3 and W4, the position of the guide rail set is found where the corresponding first visible light laser and second visible light laser are shining on each of the reference lines W3 and W4, and that position is designated as the installation position (centered position) of the guide rail R3.

[0036] As described above, the elevator guide rail centering jig 3 according to the second embodiment is provided with a first laser irradiation unit 31 that irradiates a first visible light laser and a second laser irradiation unit 32 that irradiates a second visible light laser. Furthermore, the first laser irradiation unit 31 and the second laser irradiation unit 32 are arranged so that the first visible light laser and the second visible light laser are perpendicular to each other at a position corresponding to the reference line when viewed vertically from above. This allows the worker to perform centering work to adjust the installation position of the guide rail R3 by referring to how the laser light strikes the reference lines W3 and W4. In particular, how the laser light strikes the reference lines W3 and W4 can be easily seen even from a short distance away in a dimly lit elevator shaft, making the centering work more efficient and safe.

[0037] Furthermore, the first laser irradiation unit 31 and the second laser irradiation unit 32 are configured to emit visible light lasers of different colors. This makes it easy to determine whether only one or both of the first visible light laser and the second visible light laser are irradiating the reference line W3 (or the reference line W4), and if only one, which laser light is irradiating the reference line W3 (or the reference line W4).

[0038] In the second embodiment, the first laser irradiation unit 31 and the second laser irradiation unit 32 are described as emitting visible light lasers of different colors, but instead of or in addition to this, as in a modified example of the first embodiment, the arrangement of the first laser irradiation unit 31 and the second laser irradiation unit 32 can be changed so that the first visible light laser and the second visible light laser pass at positions offset from each other on a vertical line corresponding to the reference line W3 (or the reference line W4). In this case, it is possible to recognize which laser light is irradiating the reference line W3 (or the reference line W4) based on the position of the laser light irradiating the reference line W3 (or the reference line W4). [Explanation of symbols]

[0039] 1,2,3 Jig 10 Main rod 20, 120 base 23 Notch 24 Spindle 25 Swing arm 26 Spindle 27 Screw shaft 28 pieces 29 Nut 31 First laser irradiation unit 31a First visible light laser 32 Second laser irradiation unit 3Ra Second visible light laser 33 Raised platform R1, R2, R3 guide rails Ra braking surface Rb tip surface W1, W2, W3, W4 reference lines 123 First notch 223 Second notch

Claims

1. A centering jig used when adjusting the installation position of a guide rail in a hoistway based on a reference line that is stretched in the hoistway and extends vertically, a jig body that is detachably fixed to the guide rail; a first laser irradiation means provided in the jig body and configured to irradiate a first visible laser beam; a second laser irradiation means provided on the jig body and configured to irradiate a second visible light laser; the first laser irradiation means and the second laser irradiation means are arranged so that the first visible light laser and the second visible light laser are orthogonal to each other at a position corresponding to the reference line when viewed from vertically above, The first laser irradiation means and the second laser irradiation means are arranged so that the first visible light laser and the second visible light laser pass at offset positions from each other on a vertical line corresponding to the reference line.

2. 2. The centering jig for an elevator guide rail according to claim 1, wherein the first visible laser beam and the second visible laser beam have different colors.

Images