JP6696492B2 - Passenger conveyor chain elongation measuring gauge - Google Patents

Description

  The present invention relates to a measuring gauge for measuring the elongation rate of various chains used for passenger conveyors such as escalators.

  In a passenger conveyor such as an escalator, a step chain is stretched endlessly on a step sprocket arranged on an upper floor side and a lower floor side, and a step on which a passenger rides is arranged on the step chain. The step sprocket is mounted on the driven sprocket, and the driven sprocket is connected by a drive chain and a drive sprocket that is connected to the electric motor via a reduction mechanism. A handrail chain for driving the handrail is connected to the driven sprocket.

  These chains may experience growth over time. Therefore, in recent years, the chain growth or the growth rate inspection has been added to the inspection items in the regular inspection of the escalator.

  As a gauge for measuring the elongation rate of a chain, for example, Patent Document 1 proposes a gauge-like gauge. The gauge has a reference hole formed at one end, and a measurement window hole that is long in the longitudinal direction is formed at a position apart from the reference hole. The measuring window hole has multiple scales.The reference hole is fitted to the roller pin of the chain, the roller pin for several pitches is inserted into the measuring window hole, and the position of the roller pin to be measured The scale of the handrail chain is measured by reading the scale.

JP, 2009-74882, A

  However, since the chain of the passenger conveyor is stretched in a narrow space such as the side of the electric motor, it is difficult to accurately read the scale of the gauge with the gauge attached to the chain.

  It is an object of the present invention to provide a measuring gauge that can measure the elongation of a passenger conveyor chain without relying on visual inspection.

The chain elongation measuring gauge of the passenger conveyor of the present invention is
A gauge for measuring the elongation of a chain stretched over a passenger conveyor,
Base material,
A reference hole formed in the base end of the base material, into which the first roller pin of the chain is fitted,
A measurement surface formed on the tip of the base material, with which a second roller pin spaced from the first roller pin of the chain by a predetermined pitch can come into contact;
Have
A window is provided between the reference hole and the measurement surface to avoid a roller pin existing between the first roller pin and the second roller pin.

  The measurement surface may be formed in a surface shape having a different distance from the reference hole, such as an arc shape or a mountain shape.

A plurality of the reference holes are formed at the base end of the base material, and a measurement surface facing each reference hole is formed,
The distances to the measurement surface facing the reference holes may be different from each other.

  A plurality of measurement surfaces having different distances from the reference hole may be formed at the tip of the base material.

  The reference hole can be formed in an arc shape, a curved shape, or the like in which the tip end-side end surface with which the first roller pin abuts is paired and continuous with the plurality of measurement surfaces.

  According to the chain elongation measuring gauge of the present invention, the elongation of the chain of the passenger conveyor can be measured without relying on visual inspection, and the elongation of the chain can be accurately measured even in a narrow space. You can

FIG. 1 is a front view of a chain elongation measuring gauge showing a first embodiment of the present invention. FIG. 2 is a plan view showing a chain elongation measuring step using the chain elongation measuring gauge of the first embodiment. FIG. 3 is an explanatory diagram of a chain elongation rate measuring process using the chain elongation rate measuring gauge according to the first embodiment as viewed from the front side. FIG. 4 is a front view of a chain elongation measuring gauge showing a second embodiment of the present invention. FIG. 5: is explanatory drawing which looked at the elongation rate measurement process of the chain by the chain elongation rate measurement gauge of 2nd Embodiment from the front side. FIG. 6 is a front view of a chain elongation measuring gauge showing a third embodiment of the present invention. FIG. 7: is explanatory drawing which looked at the elongation rate measurement process of the chain by the chain elongation rate measurement gauge of 3rd Embodiment from the front side.

  A chain elongation measuring gauge 10 (hereinafter simply referred to as "gauge 10") of the present invention and a method of measuring the elongation rate of a chain 70 using the gauge 10 will be described with reference to the drawings.

<First Embodiment>
FIG. 1 is a front view of the gauge 10 according to the first embodiment, and FIGS. 2 and 3 are explanatory views showing a state in which the elongation rate of the chain 70 is measured using the gauge 10.

  The chain 70 whose elongation rate is to be measured can be exemplified by a step chain, a handrail chain, a drive chain or the like used in a passenger conveyor such as an escalator. The general structure of the chain 70 will be briefly described. As shown in FIG. 2, the chain 70 is configured by alternately stacking inner links 71 and outer links 72 and connecting them by roller pins 73. A bush and a roller 76 are fitted between the inner links 71, 71 facing each other on the roller pin 73, and the tip of the roller pin 73 is retained by, for example, a split pin 77.

  The gauge 10 of the present invention has, as a basic configuration, a reference hole 30 into which one roller pin (hereinafter referred to as "first roller pin 74") is fitted on the base end side of a thin plate-shaped base material 20, The tip end is provided with a measuring surface 40 that can come into contact with a roller pin (hereinafter referred to as “second roller pin 75”) that is separated from the first roller pin 74 by a predetermined pitch. A window portion 50 is formed in the base material 20 between the reference hole 30 and the measurement surface 40 to avoid one or a plurality of roller pins 73 existing between the first roller pin 74 and the second roller pin 75. .. The first roller pin 74 does not have to be a specific roller pin of the chain 70.

  Then, in the gauge 10 of the present invention, as shown in FIGS. 2 and 3, the base material 20 is moved toward the outer link 72 located on the opposite side of the split pin 77 of the chain 70, and the reference hole 30 is moved to the first position. The first roller pin 74 and the window portion 50 are passed through the plurality of roller pins 73 between the first roller pin 74 and the second roller pin 75. Then, from this state, the base material 20 is slid and rotated around the first roller pin 74 on the chain 70, and the elongation rate of the chain 70 depends on whether the measurement surface 40 contacts the second roller pin 75 to be measured. To judge. That is, if the chain 70 is within the predetermined elongation, the measurement surface 40 hits the second roller pin 75 and the rotation stops when the base material 20 is rotated. Accordingly, it can be determined that the chain 70 is within the predetermined elongation rate. On the other hand, when the chain 70 extends beyond the predetermined elongation rate, the measurement surface 40 does not come into contact with the second roller pin 75 even when the base material 20 is rotated. Thereby, it can be determined that the chain 70 is stretched at a rate higher than the predetermined rate.

  As a specific embodiment, in order to measure the elongation of the chain 70 accurately, the base material 20 is preferably made of a material having rigidity, excellent wear resistance, and resistant to deformation due to thermal expansion or the like. Be done. For example, the substrate 20 can be made of metal such as stainless steel or titanium alloy, hard plastic, or the like. The length of the base material 20 is determined according to the distance between the first roller pin 74 and the second roller pin 75, which is the measurement target, and the width is such that the base material 20 is rotated and the measurement surface 40 is moved to the second roller pin 75. Ensure the required length for abutment. Further, the thickness of the base material 20 secures the minimum value at which the gauge 10 secures rigidity and does not easily deform. If the width or thickness is unnecessarily large, the gauge 10 becomes large and heavy, which makes it difficult to handle and makes it difficult to measure the elongation of the chain 70 in a narrow space.

  The reference hole 30 formed at the base end of the base material 20 has a size such that the first roller pin 74 having a circular cross section is fitted therein, and in the illustrated embodiment, the first roller pin 74 is almost the same in the width direction. The length that fits without wobbling and the lengthwise direction are approximately rectangular longer than this. The width of the reference hole 30 can be accurately measured by fitting the first roller pin 74 with almost no play. Further, by making the width of the reference hole 30 longer than that of the first roller pin 74, it is possible to easily fit the reference hole 30 into the first roller pin 74, and even when it is difficult to visually check, the work can be performed by groping. it can. Of course, the reference hole 30 may be circular or elliptical.

  The measurement surface 40 formed at the tip of the base material 20 is used to determine the elongation rate of the chain 70 depending on whether the measurement surface 40 contacts the second roller pin 75. The measurement surface 40 may have a surface shape such as an arc shape or a curved shape having a different distance from the reference hole 30. In FIG. 1, the measurement surface 40 is formed in an arc shape. Then, the most projecting farthest position 41 of the measurement surface 40 is determined as follows based on the distance from the reference hole 30.

  As shown in FIG. 1, when the distance L from the tip end surface 31 of the reference hole 30 is the farthest position 41 of the measurement surface 40, the distance L is equal to the first roller pin 74 and the second roller pin 74 shown in FIG. It is determined based on the distance between the roller pin 75 (pitch P and the number of pitches n), the diameter D of the roller pin 73, and the allowable elongation rate E of the chain 70. For example, when the first roller pin 74 and the second roller pin 75 are separated by n pitches, the center-to-center distance between the first roller pin 74 and the second roller pin 75 is n × P. A value obtained by subtracting the diameter D of the roller pin 73 from a value E × nP obtained by multiplying the allowable elongation E by this is the distance L from the tip end surface 31 to the farthest position 41 of the measurement surface 40.

  The longer the distance L is, the larger the pitch n between the first roller pin 74 and the second roller pin 75 of the chain 70 that can be measured can be set. Therefore, the accuracy of the elongation rate that can be measured by the gauge 10 can be increased. On the other hand, when the distance L is short, the base material 20 can be made short, the weight of the gauge 10 can be reduced, and the handling thereof can be facilitated.

  For example, in the case of an escalator, the elongation rate E of the chain 70 can be set to 0.7% for the priority inspection reference value and 1.0% for the correction required reference value. When measuring the elongation rate, two kinds of gauges 10 having an elongation rate E of 0.7% and 1.0% may be prepared.

  For example, in the JIS # 120 chain, the pitch P is 38.10 mm and the diameter D of the roller pin 73 is 11.11 mm. In this case, in order to manufacture the gauge 10 with the pitch number n set to 6, for example, the distance L is 219.009 mm when the elongation rate E is 0.7%, and the distance L is when the elongation rate E is 1.0%. May be 219.78 mm. For the sake of explanation, the distance L is a value rounded to the third decimal place.

  The window 50 is an opening for avoiding the roller pin 73 between the first roller pin 74 and the second roller pin 75, and in the figure, a position not facing the roller pin 73 is reinforced by a bridge 52. The window 50 has two substantially rectangular openings in FIGS. 1 and 3. Of course, the shape of the window portion 50 is not limited to this, and it may be a single rectangular shape, or a fan-shaped hole that widens from the reference hole 30 side or the like.

  As shown in FIG. 2, the gauge 10 having the above-described structure approaches the outer link 72 from the side opposite to the split pin 77 of the chain 70, and as shown in FIG. And the roller pins 73, 73 between the first roller pin 74 and the second roller pin 75 are housed in the window portion 50. Referring to FIG. 3A, the first roller pin 74 is not in contact with the tip end surface 31 of the reference hole 30, but even in such a case, by the subsequent slide rotation of the base material 20, the measurement surface is Since the base material 20 retreats to the left side in the drawing by the contact of the second roller pin 75 with the second roller pin 75, and the tip end side end surface 31 of the reference hole 30 and the first roller pin 74 contact each other, there is no problem.

  Then, from the state shown in FIG. 3A, the base material 20 is slid and rotated while being brought into contact with the chain 70 as shown by the arrows in FIGS. 3B and 3C. When two gauges 10 having different elongations E are used for measurement, the one having the smallest elongation E (for example, 0.7% and 1.0%) is used first.

  When the elongation rate of the chain 70 is equal to or less than the elongation rate of the gauge 10, the measurement surface 40 contacts the second roller pin 75, and the base material 20 rotates midway as shown in FIG. 3B. Be blocked. That is, it can be seen that the elongation rate of the chain 70 is equal to or less than the elongation rate of the gauge 10 if the measurement surface 40 does not exceed the second roller pin 75. Whether or not the measurement surface 40 crosses the second roller pin 75 can be determined by the feel of the operator's hand, so it is not always necessary to visually check and the elongation of the chain 70 should be less than that of the gauge 10 by groping. Can be confirmed.

  On the other hand, when the elongation rate of the chain 70 exceeds the elongation rate of the gauge 10, the measurement surface 40 does not contact the second roller pin 75, and the farthest position 41 exceeds the second roller pin 75, and the measurement surface 40 does not contact the second roller pin 75. The material 20 rotates. FIG. 3C shows the moment when the farthest position 41 of the measurement surface 40 crosses without contacting the second roller pin 75. Then, when the base material 20 is slid and rotated downward, it can be seen that the chain 70 has an elongation rate exceeding the elongation rate of the gauge 10. Therefore, the same procedure is performed again for the gauge 10 having a large elongation rate E.

  As a result, when only the gauge 10 having a small elongation rate E passes through the second roller pin 75, the elongation rate of the gauge 10 exceeds 0.7% which is the critical inspection standard value. However, since the required correction standard value is 1.0% or less, it is necessary to monitor the change with emphasis in future inspections. On the other hand, when the gauge 10 having a large elongation E also comes into contact with the second roller pin 75, the elongation of the chain 70 is 1.0% or more, and therefore measures such as adjustment and replacement should be taken early. do it.

  With the gauge 10 of the present invention, the elongation of the chain 70 can be determined by the feel of the operator's hand without the need to visually check the scale or the like. Therefore, there is an advantage that even in the case where the gauge is difficult to visually check, such as the chain 70 stretched in a narrow space on the side of the electric motor of the escalator.

<Second Embodiment>
In the present embodiment, as shown in FIGS. 4 and 5, a plurality of reference holes 30 and a measurement surface 40 facing each reference hole 30 are provided in the base material 20 to measure the elongation rate of the chain 70 itself. The gauge 10 that is made possible will be described. The members having the same reference numerals as those in the above embodiment have the same members and functions unless otherwise specified.

  Specifically, as shown in FIG. 4, the base material 20 has a plurality of reference holes 30 formed in a row on the base end side, and the measurement surface 40 is provided on the tip end side so as to face each reference hole 30. Has been formed. The measurement surface 40 is formed such that the elongation rate E increases from the upper side in increments of 0.1% from 0.6% to 1.0%, for example. That is, the distance L5 from the lowermost tip end face 31 to the farthest position 41 is longer than the distance L1 from the uppermost tip end face 31 of the reference hole 30 to the farthest position 41 of the measurement surface 40. ing.

  Then, as shown in FIG. 5A, the first roller pin 74 is fitted into the uppermost reference hole 30, and it is determined whether or not the uppermost measurement surface 40 facing the second roller pin 75 abuts. To do. As shown by the arrow in the figure, whether or not the measurement surface 40 has been exceeded can be determined more reliably by raising and lowering the measurement surface 40 side of the base material 20. It can be seen that the elongation percentage of the chain 70 is less than 0.6% unless the uppermost measurement surface 40 contacts the second roller pin 75 and exceeds it. When the measurement surface 40 exceeds the second roller pin 75, the first roller pin 74 is sequentially fitted into the reference hole 30 on the lower side and faces each other as shown in FIGS. 5B and 5C. Whether or not the measurement surface 40 exceeds the second roller pin 75 is determined, and the elongation rate E of the measurement surface 40 contacted without exceeding the second roller pin 75 can be determined to be the elongation rate of the chain 70. FIG. 5B is an explanatory diagram of the chain 70 that can go beyond the third measurement surface 40. Further, FIG. 5C is an explanatory view of the chain 70 that could not exceed the third measurement surface 40, in which the second roller pin 75 is arranged from the lower side of the third measurement surface 40, The state where the substrate 20 is pulled up and the measurement is performed is shown. The worker counts whether the measurement surface 40 did not exceed the second roller pin 75 when the first roller pin 74 was fitted into the reference hole 30 for measurement, so that the chain 70 can be extended without relying on visual inspection. The rate can be measured.

  According to the gauge 10 of the present embodiment, the elongation rate of the chain 70 can be measured with one gauge without using a plurality of gauges.

<Third Embodiment>
In the present embodiment, as shown in FIG. 6 and FIG. 7, a gauge 10 having a plurality of measurement surfaces 40, 40 with a reference hole 30 in an arc shape will be described. The members having the same reference numerals as those in the above embodiment have the same members and functions unless otherwise specified.

  In the gauge 10 of the second embodiment, the elongation rate of the chain 70 itself can be determined, but it is necessary to fit the first roller pins 74 in the respective reference holes 30 in order, and there is a portion that is inconvenient to handle. Therefore, in the gauge 10 of the present embodiment, the elongation rate can be determined while sharing one reference hole 30 for a plurality of measurement surfaces 40. More specifically, the reference hole 30 is formed in a shape such as an arc shape or a curved shape in which the front end side end surface 31 with which the first roller pin 74 abuts is connected to the plurality of measurement surfaces 40 in pairs. ..

  Specifically, in the gauge 10 of the third embodiment, as shown in FIG. 6, the base material 20 has a substantially fan shape centered on a virtual center point O, and the reference hole 30 has a virtual center on the base end side. An arcuate reference hole 30 centered on the point O is formed. Similarly, the tip of the base material 20 is provided with a plurality of measurement surfaces 40, 40 at the ends of an arc centered on the virtual center point O. The window portion 50 and the reinforcing bridge 52 are also fan-shaped or arc-shaped with the virtual center point O as the center.

  The measurement surface 40 is formed such that the amount of protrusion increases from the upper side of FIG. For example, in the figure, ten measurement surfaces 40 are formed whose elongation rate E increases in 0.1% increments from 0.1% to 1.0%. That is, the distance L10 from the tip end surface 31 of the reference hole 30 to the farthest position 41 of the uppermost measurement surface 40 is longer than the distance L10 to the lowest farthest position 41.

  Then, as shown in FIG. 7A, the reference hole 30 is fitted into the first roller pin 74, and it is determined whether or not to contact the second roller pin 75 in order from the measurement surface 40 having a small elongation rate E. In the measurement, the lower measurement surface 40 is tried in order while raising and lowering the base material 20 while confirming whether the upper surface passes through the second roller pin 75 from the measurement surface 40 having a small elongation E.

  At this time, since the reference hole 30 has an arc shape, the first roller pin 74 moves in the reference hole 30, but the measurement surface 40 hits the second roller pin 75, so that the first roller pin 74 contacts the measurement surface 40. On the other hand, there is no influence on the measurement because it is the shortest distance.

  Then, when the base material 20 is pulled up, it is possible to measure that the elongation rate E of the measurement surface 40 that does not exceed the second roller pin 75 is the elongation rate of the chain 70.

  As shown in FIG. 7B, the measurement is performed by operating the base material 20 so that the measurement surface 40 is pressed against the second roller pin 75, so that the measurement surface 40 feels beyond the second roller pin 75. Can be obtained by the worker. As a result, it is possible to determine the number of measurement surfaces 40 that have exceeded the second roller pin 75. For example, three measurement surfaces 40 (0.1% to 0.3%) have exceeded the second roller pin 75. As shown in FIG. 7C, when the fourth measurement surface 40 does not exceed the second roller pin 75, it can be determined that the elongation rate is less than 0.4%. Accordingly, the elongation rate of the chain 70 can be measured without relying on visual inspection.

  According to the gauge 10 of the present embodiment, it is possible to measure the elongation rate of the chain 70 without inserting and removing the first roller pin 74 from the reference hole 30, which is suitable for measurement in a narrow space.

  The above description is for explaining the present invention, and should not be understood as limiting the invention described in the claims or limiting the scope. Further, it is needless to say that the configuration of each part of the present invention is not limited to the above-described embodiment, and various modifications can be made within the technical scope described in the claims.

  For example, the shape, size, distance L, etc. of the base material 20 of the embodiment can be changed as appropriate, and the type of the chain 70 and the elongation E as a reference value are not limited to those in the above embodiment. It should be understood that there is no.

  Furthermore, the gauge 10 can print, stamp, etc. the kind of the chain 70 applied to the base material 20, the product number, the elongation rate E, etc. on the measurement surface 40. Further, the measurement surface 40 may be colored according to the elongation rate E so that the elongation rate E can be visually discriminated.

10 Chain elongation measuring gauge 20 Base material 30 Reference hole 40 Measuring surface 50 Window 70 Chain 74 First roller pin 75 Second roller pin

Claims (5)

A gauge for measuring the elongation of a chain stretched over a passenger conveyor,
Base material,
A reference hole formed in the base end of the base material, into which the first roller pin of the chain is fitted,
A measurement surface formed on the tip of the base material, with which a second roller pin spaced from the first roller pin of the chain by a predetermined pitch can come into contact;
Have
Between the reference hole and said measurement surface is immediately give a window to avoid a roller pin that exists between the second roller pin and said first roller pin,
When the direction connecting the reference hole and the measurement surface is the longitudinal direction, and the direction orthogonal to the longitudinal direction is the width direction, the reference hole has a shape in which the longitudinal direction is longer than the width direction,
Chain elongation measuring gauge. The measurement surface is formed in a surface shape with a different distance from the reference hole,
The chain elongation measuring gauge according to claim 1. A plurality of the reference holes are formed at the base end of the base material, and a measurement surface facing each reference hole is formed,
Distances to the measurement surface facing the reference holes are different,
The chain elongation measuring gauge according to claim 1 or 2. A gauge for measuring the elongation of a chain stretched over a passenger conveyor,
Base material,
A reference hole formed in the base end of the base material, into which the first roller pin of the chain is fitted,
A measurement surface formed on the tip of the base material, with which a second roller pin spaced from the first roller pin of the chain by a predetermined pitch can come into contact;
Have
Between the reference hole and the measurement surface, a window portion that avoids the roller pin existing between the first roller pin and the second roller pin,
A chain elongation measuring gauge comprising:
The reference hole is formed in an arc shape centered on a virtual center point O,
A plurality of measurement surfaces are formed at the tip of the base material, and the plurality of measurement surfaces are fan-shaped at different distances from the virtual center point O at the ends of an arc centered on the virtual center point O. Or it is an arc shape,
Chain elongation measuring gauge. The reference hole has a shape in which the tip end-side end surface with which the first roller pin abuts is continuous with the plurality of measurement surfaces in a pair.
The chain elongation measuring gauge according to claim 4.

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