JP7345381B2 - Chain elongation measurement device - Google Patents

Description

The present invention relates to a measuring device for measuring the elongation rate of a chain.

2. Description of the Related Art Measuring jigs for measuring the elongation rate of drive chains or handrail chains used in escalators, which are an example of passenger conveyors, are conventionally known. For example, Patent Document 1 discloses a measuring jig that measures the elongation rate of a chain by inserting roller pins corresponding to multiple pitches of the chain into an elongated measuring window hole.

JP2009-074882A

However, although the measuring jig disclosed in Patent Document 1 can measure the elongation rate for multiple pitches of the chain inserted into the measurement window hole, it cannot measure the elongation rate for one pitch of the chain. I can't. With this measurement jig, there is also a risk of overlooking abnormal wear on one plate of the chain.

An object of the present invention is to provide a measuring device that can measure the elongation rate of one pitch of a chain.

The measuring device according to the present invention is a measuring device for measuring the elongation rate of a chain, and includes a long main body disposed along the running direction of the chain, and a main body protruding from the main body toward the chain. a plurality of measurement pieces that are movable along the longitudinal direction of the chain and are inserted into gaps between adjacent rollers of the chain and abut against one of the adjacent rollers; and a plurality of measurement pieces that are movable along the longitudinal direction of the chain. and a measuring unit that measures the distance between adjacent rollers of the chain based on the position of the chain.

In the measuring device according to the present invention, the rollers on one side of the chain are provided so as to protrude from the main body toward the chain at both ends in the longitudinal direction of the main body, and the rollers on one side of the chain It is preferable to further include two support pieces that respectively support the roller on the other side.

In the measuring device according to the present invention, the measuring unit includes a position detecting unit that detects the positions of the plurality of measurement pieces in the longitudinal direction, and a position detection unit that calculates the distance between adjacent measurement pieces based on the positions of the plurality of measurement pieces. It is preferable to include a calculation section that calculates the distance between the rollers based on the distance between the measurement pieces.

The measuring device according to the present invention is a measuring device for measuring the elongation rate of a chain, and includes a long main body disposed along the running direction of the chain, and a main body protruding from the main body toward the chain. Measurement that measures the distance between adjacent rollers of the chain based on the amount of insertion of the plurality of measurement pieces, which are movable along the longitudinal direction of the chain and are inserted into the gaps between adjacent rollers of the chain. It is equipped with a section and a section.

In the measuring device according to the present invention, the measuring unit includes an insertion amount detection unit that detects the insertion amount of the plurality of measurement pieces, and an insertion amount detection unit that calculates the interval between adjacent measurement pieces based on the insertion amount of the plurality of measurement pieces. and a calculation section that calculates the distance between adjacent rollers based on the distance between the measurement pieces.

According to the measuring device according to the present invention, it is possible to measure the elongation rate for one pitch of the chain.

It is a perspective view showing a chain concerning an embodiment. It is (A) a side view and (B) a top view showing a measuring device which is an example of an embodiment. FIG. 2 is a block diagram showing a functional configuration of a measurement unit that is an example of an embodiment. It is a schematic diagram which shows an example of the measurement procedure of the elongation rate of a chain by the measuring device which is an example of embodiment. It is (A) a side view (B) a top view which shows the measuring device which is another example of an embodiment. FIG. 3 is a block diagram showing the functional configuration of a measurement unit that is another example of the embodiment. It is a schematic diagram which shows an example of the measurement procedure of the elongation rate of a chain with the measuring device which is another example of embodiment.

Hereinafter, one example of an embodiment of the present invention and another example will be described in detail. In the following description, specific shapes, materials, directions, numerical values, etc. are illustrative to facilitate understanding of the present invention, and can be changed as appropriate depending on the use, purpose, specifications, etc.

The chain 3 will be explained using FIG. 1. FIG. 1 is a perspective view of the chain 3.

As illustrated in FIG. 1, the chain 3 whose elongation rate is measured by measuring devices 10 and 20, which will be described later, is a handrail chain or a drive chain used, for example, in an escalator, which is an example of a passenger conveyor. It is a roller chain that transmits information.

The chain 3 includes an inner plate 4 formed in a figure 8 shape having two holes 4A, and an outer plate 5 formed in a figure 8 shape having two holes 5A similarly to the inner plate 4. . A pair of opposing inner plates 4 and a pair of opposing outer plates 5 are connected by roller pins 6. The roller pin 6 passes through the holes 4A of the pair of inner plates 4 and the holes 5A of the pair of outer plates 5, and both ends thereof are secured by caulking or the like. A bush 7 and a roller 8 are fitted into the roller pin 6 between opposing inner plates 4.

Here, one pitch of the chain 3 is the distance between the centers of adjacent rollers 8 of the chain 3. Further, the elongation rate is the ratio of the actual distance between adjacent rollers 8 to the reference distance. The reference interval between the rollers 8 is, for example, the interval between adjacent rollers 8 of the chain 3 when not in use. The reason why the distance between adjacent rollers 8 of the chain 3 increases is often due to wear of the holes 4A of the inner plate 4 or the holes 5A of the outer plate 5.

The measuring device 10 will be explained using FIG. 2(A), FIG. 2(B), and FIG. 3. FIG. 2(A) is a side view showing the measuring device 10 and the chain 3. FIG. FIG. 2(B) is a plan view showing the measuring device 10. FIG. 3 is a block diagram showing the functional configuration of the measuring section 16.

The measuring device 10 is a device that measures the elongation rate of the chain 3. Although details will be described later, the measuring device 10 can measure the elongation rate for one pitch of the chain 3. When measuring the elongation rate of the chain 3, the measuring device 10 of this embodiment measures the elongation rate of each pitch in the measurement portion of the chain 3. In this embodiment, the length of the measurement portion of the chain 3 is, for example, six pitches of the chain 3.

As illustrated in FIG. 2(A), the measuring device 10, which is an example of the embodiment, has a long main body 11 and a chain 3 such that the measurement portion of the chain 3 is stretched in the running direction. It is provided with two support pieces that are tensioned and supported in opposite directions, and a plurality of measurement pieces 15 that are inserted into gaps between adjacent rollers 8 of the chain 3. The measuring device 10 also includes a measuring section 16 that measures the elongation rate of each pitch of the measured portion of the chain 3, and a display section 17 that displays the elongation rate of each pitch of the measured portion of the chain 3.

Hereinafter, as illustrated in FIG. 2(A), the direction along the longitudinal direction of the main body 11 will be defined as the longitudinal direction of the measuring device 10. Further, hereinafter, the side from which the fixed support piece 13, the movable support piece 14, and the plurality of measurement pieces 15 protrude will be referred to as the back side of the measuring device 10, and the side where the display section 17 is provided will be referred to as the front side.

The main body 11 has an elongated shape. When measuring the elongation rate of the chain 3 , the measuring device 10 is arranged so that the longitudinal direction of the main body 11 is parallel to the running direction of the chain 3 at the measuring portion of the chain 3 . The main body 11 is provided with a fixed support piece 13, a movable support piece 14, and a plurality of measurement pieces 15, which protrude from the main body 11 toward the back side.

A rail 12 is built into the main body 11 along the longitudinal direction. The base end 14A of the movable support piece 14 and the base end 15A of the measurement piece 15 are engaged with the rail 12, and the movable support piece 14 and the measurement piece 15 are movable along the longitudinal direction of the main body 11. . An elongated hole (not shown) is formed in the back surface of the main body 11 along the longitudinal direction, and the movable support piece 14 and the measurement piece 15 protrude through the elongated hole.

The support pieces include a fixed support piece 13 provided at one end of the main body 11 and a movable support piece 14 provided at the other end of the main body 11.

The fixed support piece 13 supports the roller 8 on one side of the chain 3 so that the measurement portion of the chain 3 is kept stretched along the running direction. The fixed support piece 13 is formed into a rod shape, protrudes from the main body 11 toward the back side, and is fixed to one end of the main body 11 in the longitudinal direction. An engaging portion 13B with which the roller 8 engages is formed on the outer circumferential surface of the fixed support piece 13 in the longitudinal direction. The engaging portion 13B may be formed, for example, by cutting out the outside of the side peripheral surface of the fixed support piece 13 in a curved shape.

The movable support piece 14 supports the roller 8 on the other side of the chain 3 so that the measurement portion of the chain 3 is kept stretched along the running direction. The roller 8 on the other side is preferably separated from the roller 8 on the one side by a distance that is at least longer than the measuring portion of the chain 3 .

The movable support piece 14 is formed into a rod shape, protrudes from the main body 11 toward the back side, and is provided at the other end of the main body 11 in the longitudinal direction. The movable support piece 14 is movable along the longitudinal direction of the main body 11 as described above. An engaging portion 14B with which the roller 8 engages is formed on the outer circumferential surface of the movable support piece 14 in the longitudinal direction. The engaging portion 14B may be formed, for example, by cutting out the outside of the side peripheral surface of the movable support piece 14 in a curved shape.

A threaded portion is formed in a portion of the movable support piece 14 that passes through the elongated hole of the main body 11, and a nut N serving as a fixing portion is screwed into the portion. With such a configuration, the movable support piece 14 is fixed to the main body 11 by tightening the nut N toward the main body 11.

According to the fixed support piece 13 and the movable support piece 14, the engagement part 13B of the fixed support piece 13 is engaged with the roller 8 on one side of the chain 3, and the engagement part 13B of the movable support piece 14 is engaged with the roller 8 on the other side. By engaging 14B and separating the movable support piece 14 from the fixed support piece 13, the measuring portion of the chain 3 can be kept in tension along the running direction. At this time, by fixing the movable support piece 14 with the nut N, the measurement portion of the chain 3 can be maintained in a tensioned state.

Although the measuring device 10 of this embodiment is configured to include the fixed support piece 13 and the movable support piece 14 as two support pieces, the present invention is not limited to this. The structure may include two movable support pieces 14 as the two support pieces.

The measuring piece 15 is inserted into the gap between the adjacent rollers 8 of the measuring part of the chain 3 in a state in which the measuring part of the chain 3 is stretched along the running direction, and is inserted into the side peripheral surface of one of the adjacent rollers 8. It comes into contact with. The measurement piece 15 is formed into a rod shape and is provided so as to protrude from the main body 11 . The movable support piece 14 is provided on the main body 11 so as to be movable along the longitudinal direction of the main body 11, as described above. In the measuring device 10 of this embodiment, for example, seven measuring pieces 15 are arranged in a line along the longitudinal direction between the fixed support piece 13 and the movable support piece 14.

The measurement unit 16 measures the elongation rate of each pitch of the measurement portion of the chain 3 based on the position of each measurement piece 15 in the longitudinal direction. The measurement unit 16 is built into the main body 11 on the front side of the rail 12. As illustrated in FIG. 3, the measuring unit 16 includes a position detecting unit 16A that detects the position of each measuring piece 15 in the longitudinal direction, and a calculating unit 16B that calculates the elongation rate of each pitch of the measured portion of the chain 3. and has.

The position detection unit 16A has a function of detecting the position of each measurement piece 15 in the longitudinal direction on the rail 12. The position detection unit 16A may, for example, provide an electromagnetic induction type absolute encoder at the base end 15A of the measurement piece 15 to detect the absolute position of each measurement piece 15 in the longitudinal direction. Further, the position detection unit 16A records minute scales by etching or magnetization along the longitudinal direction of the rail 12 of the main body 11, and detects that the base end 15A of each measurement piece 15 has moved by the scale. You may.

The calculation unit 16B calculates the elongation rate of each pitch of the measurement portion of the chain 3 based on the position of each measurement piece 15 detected by the position detection unit 16A. The calculation unit 16B includes a CPU as a calculation processing device that executes control, and a ROM, RAM, and HDD as storage devices connected to the CPU.

More specifically, the calculation unit 16B calculates the actual interval between adjacent measurement pieces 15 based on the position of each measurement piece 15 detected by the position detection unit 16A, and further calculates the actual interval between adjacent measurement pieces 15. The actual distance between adjacent rollers 8 is calculated based on . Further, the calculation unit 16B calculates the elongation rate of each pitch of the measurement portion of the chain 3 based on the interval between adjacent rollers 8. It is preferable that the elongation rate of each pitch is calculated as a ratio of the actual distance between adjacent rollers 8 to the reference distance between adjacent rollers 8 .

The reference spacing between rollers 8 is the spacing between adjacent rollers 8 when the chain 3 is not stretched at all. The reference spacing between the rollers 8 may be obtained by measuring the spacing between adjacent rollers 8 of the chain 3 that is not in use using the measuring device 10. Alternatively, it may be set in advance in the calculation unit 16B.

In the measuring device 10 of this embodiment, the distance between adjacent measuring pieces 15 is calculated based on the position of each measuring piece 15, but the calculation is not limited thereto. If the fixed support piece 13, the movable support piece 14, and each measuring piece 15 are to be inserted into the gaps between the adjacent rollers 8, the position of the fixed support piece 13, the movable support piece 14, and each measuring piece 15 is The distance between adjacent measurement pieces 15, the distance between fixed support piece 13 and measurement piece 15, or the distance between movable support piece 14 and measurement piece 15 may also be calculated.

The display section 17 displays the elongation rate of each pitch of the measured portion of the chain 3 calculated by the calculation section 16B. As illustrated in FIG. 2(B), the number of display units 17 on the front side of the main body 11 is the same as the interval between the measuring pieces 15 (in this embodiment, there are six display units 17 for seven measuring pieces 15). For example, the screen may be provided with a liquid crystal screen.

A procedure for measuring the elongation rate of the chain 3 using the measuring device 10 will be explained using FIG. 4. FIG. 4 is a schematic diagram showing an example of the measurement procedure.

First, the main body 11 of the measuring device 10 is arranged along the running direction of the chain 3, and the fixed support piece 13, the movable support piece 14, and each measuring piece 15 are inserted into the gaps between the rollers 8, respectively. At this time, each measurement piece 15 is inserted into a gap between adjacent rollers 8. Next, the movable support piece 14 is moved to the side away from the fixed support piece 13, and the movable support piece 14 is fixed to the main body 11 with the nut N. As a result, the measurement portion of the chain 3 is stretched in the running direction between the fixed support piece 13 and the movable support piece 14.

Next, from the state where each measurement piece 15 is inserted into the gap between adjacent rollers 8, each measurement piece 15 is moved in the longitudinal direction so that each measurement piece 15 comes into contact with one side of each roller 8. move it to the other side. At this time, each measurement piece 15 may be moved to one side in the longitudinal direction so that each measurement piece 15 comes into contact with the other side of each roller 8 .

Next, the measuring unit 16 measures the distance between adjacent rollers 8 in the measurement portion of the chain 3 based on the longitudinal position of each measurement piece 15, and the distance between the adjacent rollers 8 in the measurement portion of the chain 3. Based on this, the elongation rate of each pitch of the measurement portion of the chain 3 is measured.

The effects of the measuring device 10 will be explained. According to the measuring device 10, the elongation rate for one pitch of the chain 3 can be measured. Thereby, abnormal wear on one of the inner plates 4 or outer plates 5 of the chain 3 will not be overlooked.

The measuring device 20 will be explained using FIG. 5(A), FIG. 5(B), and FIG. 6. FIG. 5(A) is a side view showing the measuring device 20. FIG. 5(B) is a plan view showing the measuring device 20. FIG. 6 is a block diagram showing the functional configuration of the measuring section 26. As shown in FIG.

A measuring device 20, which is another example of the embodiment, is a device that measures the elongation rate of the chain 3. Although details will be described later, the measuring device 20 can measure the elongation rate for one pitch of the chain 3. When measuring the elongation rate of the chain 3, the measuring device 20 of this embodiment measures the elongation rate of each pitch in the measurement portion of the chain 3. In this embodiment, the length of the measurement portion of the chain 3 is, for example, seven pitches of the chain 3.

As illustrated in FIG. 5(A), the measuring device 20 has a long body 21, two contact pieces 23 that contact the rollers 8 of the chain 3, and a gap between the adjacent rollers 8 of the chain 3. A plurality of measurement pieces 25 to be inserted are provided. The measuring device 20 also includes a measuring section 26 that measures the elongation rate of each pitch of the measured portion of the chain 3, and a display section 27 that displays the elongation rate of each pitch of the measured portion of the chain 3.

Hereinafter, as illustrated in FIG. 5(A), the direction along the longitudinal direction of the main body 21 will be defined as the longitudinal direction of the measuring device 20. Further, hereinafter, the side from which the plurality of measurement pieces 25 protrude will be referred to as the back side of the measuring device 20, and the side where the display section 27 is provided will be referred to as the front side.

The main body 21 has an elongated shape. When measuring the elongation rate of the chain 3 , the measuring device 20 is arranged so that the longitudinal direction of the main body 21 is parallel to the running direction of the chain 3 at the measuring portion of the chain 3 . The main body 21 is provided with a plurality of measuring pieces 25, which protrude from the main body 21 toward the back side.

A rail 22 is built into the main body 21 along the longitudinal direction. A base end portion 25A of the measuring piece 25 is engaged with the rail 22, and the measuring piece 25 is movable along the longitudinal direction of the main body 21. An elongated hole (not shown) is formed in the back surface of the main body 21 along the longitudinal direction, and the measuring piece 25 penetrates through the elongated hole and protrudes.

The contact piece 23 contacts the side peripheral surface of the roller 8 of the chain 3 and supports the main body 21 at a predetermined distance from the chain 3. The contact pieces 23 are provided at one end and the other end in the longitudinal direction on the back side of the main body 21, respectively. The contact piece 23 is made of rubber, for example.

The measurement piece 25 is inserted into the gap between adjacent rollers 8 of the chain 3. The measurement piece 25 is formed in the shape of a rod with a tapered tip, and is provided so as to protrude from the back side of the main body 21 . The measurement piece 25 has a base end 25A that engages with the rail 22, an insertion portion 25C that is inserted into the gap between adjacent rollers 8, and an elastic spring 25B that biases the insertion portion 25C toward the back side. .

The measurement unit 26 measures the elongation rate of each pitch of the measurement portion of the chain 3 based on the insertion amount of each measurement piece 25. The measurement unit 26 is built into the main body 21 on the front side of the rail 22.

As illustrated in FIG. 6, the measurement unit 26 includes an insertion amount detection unit 26A that detects the insertion amount of each measurement piece 25, and a calculation unit 26B that calculates the elongation rate of each pitch of the measurement portion of the chain 3. has.

The insertion amount detection section 26A has a function of detecting the insertion amount of the insertion portion 25C of the measurement piece 25. The insertion amount detection section 26A may, for example, provide an electromagnetic induction type absolute encoder in the insertion portion 25C and detect the insertion amount from the absolute position of the insertion portion 25C in the insertion direction.

The calculation unit 26B calculates the elongation rate of each pitch of the measurement portion of the chain 3 based on the insertion amount of each measurement piece 25 detected by the insertion amount detection unit 26A. The arithmetic unit 26B includes a CPU as an arithmetic processing device that executes control, and a ROM, RAM, and HDD as storage devices connected to the CPU.

More specifically, the calculation unit 26B calculates the actual distance between adjacent rollers 8 of the measurement portion of the chain 3 based on the insertion amount of each measurement piece 25 detected by the insertion amount detection unit 26A, and further calculates the Based on the actual spacing between adjacent rollers 8, the elongation rate of each pitch of the measured portion of the chain 3 is calculated. It is preferable that the elongation rate of each pitch is calculated based on the ratio of the measured actual distance between adjacent rollers 8 to the reference distance described above.

The correlation between the insertion amount of the measurement piece 25 and the interval between the rollers 8 is set in advance in the calculation unit 26B. For example, if the distance between the rollers 8 is large, the amount of insertion of the measuring piece 25 will also be large.

The display unit 27 displays the elongation rate of each pitch of the measured portion of the chain 3 calculated by the calculation unit 26B. As illustrated in FIG. 5(B), the display sections 27 are provided in the same number as the measuring strips 25 (in this embodiment, seven display sections 27 for seven measuring strips 25) on the front side of the main body 21. , for example, may be composed of a liquid crystal screen.

A procedure for measuring the elongation rate of the chain 3 using the measuring device 20 will be explained using FIG. 7. FIG. 7 is a schematic diagram showing an example of the measurement procedure.

First, the main body 21 of the measuring device 20 is arranged along the running direction of the measuring portion of the chain 3, and a plurality of measuring pieces 25 are inserted into the gaps between the adjacent rollers 8, respectively. Next, the main body 21 is brought close to the chain 3 until the contact piece 23 contacts the side peripheral surface of the roller 8 of the chain 3. At this time, the measurement piece 25 is further inserted, and the position of the insertion amount of the measurement piece 25 changes depending on the interval between adjacent rollers 8.

Next, the measurement unit 26 measures the distance between adjacent rollers 8 in the measurement portion of the chain 3 based on the insertion amount of each measurement piece 25, and the distance between the adjacent rollers 8 in the measurement portion of the chain 3 is measured based on the insertion amount of each measurement piece 25. The elongation rate of each pitch of the measurement portion of the chain 3 is measured.

The effects of the measuring device 20 will be explained. According to the measuring device 20, the elongation rate for one pitch of the chain 3 can be measured. Thereby, abnormal wear on one of the inner plates 4 or outer plates 5 of the chain 3 will not be overlooked.

It should be noted that the present invention is not limited to the above-described embodiments and modifications thereof, and it goes without saying that various changes and improvements can be made within the scope of the claims of the present application. .

3 Chain, 4 Inner plate, 5 Outer plate, 6 Roller pin, 7 Bush, 8 Roller, 10 Measuring device, 11 Main body, 12 Rail, 13 Fixed support piece, 13B Engagement part, 14 Moving support piece, 14A Base end part, 14B engaging part, 15 measuring piece, 15A base end part, 16 measuring part, 16A position detecting part, 16B calculating part, 17 display part, 20 measuring device, 21 main body, 22 rail, 23 contact piece, 25 measuring piece, 25A base end portion, 25B elastic spring, 25C insertion portion, 26 measurement portion, 26A insertion amount detection portion, 26B calculation portion, 27 display portion.

Claims (2)

A measuring device for measuring the elongation rate of a chain,
an elongated main body disposed along the running direction of the chain;
The roller is provided so as to protrude from the main body toward the chain, is movable along the longitudinal direction of the main body, and is inserted into a gap between adjacent rollers of the chain, and is inserted into the gap between adjacent rollers of the chain. a plurality of measuring pieces that come into contact with the roller;
a measurement unit that measures the distance between adjacent rollers of the chain based on the longitudinal positions of the plurality of measurement pieces;
The rollers on one side of the chain and the rollers on the other side are provided so as to protrude from the main body toward the chain at both ends in the longitudinal direction of the main body, so that the chain is stretched along the running direction. two supporting pieces each supporting the roller;
Equipped with
measuring device. The measuring device according to claim 1,
The measurement unit includes a position detection unit that detects the positions of the plurality of measurement pieces in the longitudinal direction, and a position detection unit that calculates an interval between the adjacent measurement pieces based on the positions of the plurality of measurement pieces, and calculates an interval between the adjacent measurement pieces. a calculation unit that calculates the distance between the adjacent rollers based on the distance between the rollers;
measuring device.

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