JPS6261509B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a running force measuring device for a handrail of a passenger conveyor, and more particularly to a running force detector configured to electrically detect running force.

[Background of the invention]

A passenger conveyor is a highly efficient means of transporting people that uses an endless series of steps that are electrically driven.Generally, when using a passenger conveyor, one must hold the handrails and step onto the steps while keeping one's body balanced. For safety reasons, the Building Standards Act stipulates that the speed of the steps and the handrail must be the same, and JIS specifies the amount of counterclockwise force required to stop the handrail while it is running. stipulated. For this reason, appropriate tension is always applied to the handrail while it is running. Figure 6 is a schematic diagram of the drive mechanism of the handrail of the passenger conveyor, in which 1 is the main body of the passenger conveyor, 2 is the step, 3 is the handrail, and the handrail 3 is supported by the handrail 4.
It is driven by a handrail drive wheel 6 while being tensioned by a handrail tensioning device 5, and moves at the same speed as the steps 2.

Furthermore, FIG. 7 is an explanatory view showing a conventional running force measuring device for a handrail of a passenger conveyor, which was proposed by the present inventor and disclosed in Japanese Patent Application Laid-Open No. 58-55831. This running force measuring device includes a pair of clamp indenters 7 having a curved surface that follows the curved surface of the handrail 3, and a support rod 8 that supports the clamp indenters 7 so that they can be clamped against the handrail 3. ,
Spring scale 1 that measures the traction force applied to the clamp indenter 7 via the support rod 8 as the handrail 3 travels
0.

In this measuring device, the handrail 3 is run while the measuring person holds the spring scale 10, and the traction force transmitted to the spring scale 10 via the clamp indenter 7 and the support rod 8 is applied to the spring scale 10. The running force of the handrail 3 is measured by reading the scale.

However, in the case of a measuring instrument configured in this way, since the spring scale 10 needs to be held by the measuring person, the running force of the handrail 3, that is, the clamp indenter 7
If the traction force applied to the handrail exceeds the measurement range of the spring scale 10, the measurer's body may be carried away in the running direction of the handrail 3, or the measurement may be canceled and the running force becomes zero. This poses a safety problem, as there is a risk that the body of the person being measured may be returned to the opposite direction due to reaction and impact. Furthermore, when measuring the running force of the handrail 3, errors are likely to occur due to the movement of the measurer's body or errors in reading the scale of the spring scale 10, which poses a problem in terms of measurement accuracy. Note that when the running force of the handrail 3 exceeds the measurement range of the spring scale 10 as described above, the clamp indenter 7 is moved against the handrail 3 instead of being carried by the measurer's body as described above. Misalignment may occur, which may result in damage to the design surface of the handrail 3.

[Purpose of the invention]

The present invention has been made in view of the actual situation in the prior art, and its purpose is to improve the running force of the handrail of a passenger conveyor, which can automatically measure without requiring the operator to hold it during measurement. The goal is to provide measuring instruments.

[Summary of the invention]

To achieve this objective, the present invention extends along the running direction of the handrail of the passenger conveyor,
a pair of clamping elements having a curved surface corresponding to the curved surface of the handrail and movable as a pair with the handrail; and a clamping element fixed to a parapet supporting the handrail and moving as the handrail runs. a detecting section that electrically detects the traction force applied to the indenter, and a means for connecting the indenter and the detecting section, and separating the indenter from the detecting section when the traction force applied to the indenter exceeds a predetermined value. It is configured to have

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to FIGS. 1 to 5.

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is a cross-sectional view of the - part of FIG. 1, and FIG. 3 is a plan view showing a detection section provided in this embodiment.

In FIG. 1, 7 is a pair of clamp indenters, which extend along the running direction of the handrail 3, have a curved surface 7a corresponding to the curved surface of the handrail 3, and are movable integrally with the handrail 3. It's getting old. The curved surface 7a of the clamp indenter 7 is made of a flexible elastic member such as rubber, which has a large coefficient of friction with the handrail 3. Reference numeral 11 denotes a tightening rod that fastens the clamp indenter 7 to the handrail 3 and is capable of adjusting the tightening force of the clamp indenter 7 to the handrail 3, and has a threaded portion that is screwed into a screw hole formed in the clamp indenter 7. are doing. Reference numeral 8 denotes a support rod that supports the two clamp indenters 7, and is adapted to be slidable between the clamp indenters 7 accordingly. A support rod 9 is connected to the support rod 8 and extends in the running direction of the handrail 3, and is arranged parallel to the upper surface of the handrail 3. Reference numeral 16 denotes a rotating body support portion disposed above the handrail 3 and extending along the width direction of the handrail 3;
The rotating body 17a is capable of contacting the upper surface of the handrail 3, and the rotating body 17b is capable of contacting the side surface of the handrail 3. The support rod 9 described above is arranged on the rotating body support part 16 and is supported by this rotating body support part 16. 14 is an electromagnet, and 15 is an adapter made of a magnetic material that can be connected to and detached from the electromagnet 14. This adapter 15 is integrally provided at the end of the support rod 9 described above.

13 is a detection unit, which is installed on the handrail 3's railing 4;
and has a main body 13a that can be fixed so as not to contact the handrail 3, and this main body 13a
A load cell 21 connected to the electromagnet 14 inside
and amplify the signal from this load cell 21,
A setting section that digitally displays and sets the upper limit value of the running force of the handrail 3 in consideration of safety, a comparison section that compares the upper limit value of this setting section with the signal value output from the load cell 21, and the above-mentioned A display device 19 having an output section that outputs a signal to a control section (not shown) that controls the handrail drive vehicle 6 shown in FIG. 6, a relay 20, and a display device 19.
and a battery 22 that supplies power to the electromagnet 14
and a switch 23. Note that 18 is a tightening rod for fixing the detection unit 13 to the parapet 4.

The electromagnet 14 and the adapter 15 described above constitute a connecting part that connects the clamp indenter 7 and the detection part 13, and when the traction force applied to the clamp indenter 7 exceeds a predetermined value, the clamp indenter 7 is activated. It also serves as a means for separating from the detection section 13. Further, the above-mentioned support rods 8 and 9 constitute a transmission means for transmitting the traction force applied to the clamp indenter 7 to the above-mentioned connecting portion.

FIG. 4 is a wiring diagram of the electromagnet 14 and the detection section 13. As shown in this figure, a switch 23 is connected in series to the battery 22, a contact 20b of a relay 20 and an electromagnet 14, which are connected in series with each other, are connected in parallel with these, and A relay 20 connected in series and a transistor 19a built in the display device 19 are connected. In addition, the display device 19 also has a battery 22.
The load cell 21 is connected to the display device 19 via a signal line 24.

In the circuit configured in this way, if the side shown in FIG. 4 is the positive direction, closing the switch 23 will cause the contact 20
b, the circuit of the electromagnet 14 is formed, and the electromagnet 14 is
Turn on. In addition, in the circuit of the switch 23, the relay 20, and the transistor 19a, the transistor 19
Since it does not turn on unless a reaches the set upper limit value, the circuit is not formed and the relay 20 is not driven. When the value detected by the load cell 21 reaches the upper limit value, the transistor 19a
is turned on, the relay 20 is driven, the contact 20b of the relay 20 is turned off, the power to the electromagnet 14 is momentarily cut off, and the electromagnet 14 is turned off.

FIG. 5 is an explanatory diagram showing the usage state of the embodiment configured as described above.

For example, first, the display device 19 displays the handrail 3
The upper limit value of the running force of the main body 1 of the detection unit 13 is set.
3a is placed on the balustrade 4 so as to straddle the handrail 3, and the main body 13a is fixed to the balustrade 4 with a tightening rod 18. On the other hand, the switch 23 mentioned above
It is turned on to excite the electromagnet 14, and with the adapter 15 connected to the electromagnet 14, the clamp indenter 7 supported by the support rod 8 is placed on the handrail 3. In this state, when the handrail drive vehicle 6 shown in FIG. 17
a, 17b only rotate, and the running force of the handrail 3 is not transmitted to the clamp indenter 7.

Then, when the tightening rod 11 is rotated from this state to tighten the clamp indenter 7, the clamp indenter 7 is integrally fixed to the handrail 3, and the traction force generated on the clamp indenter 7 as the handrail 3 travels is supported. Bar 8,
9, the adapter 15, and the electromagnet 14 to the load cell 21 shown in FIG.
A signal is output to the display device 19 via the signal line 24. The display device 19 digitally displays the traction force, that is, the running force of the handrail 3, in accordance with the signal from the load cell 21 at this time, and compares the signal value output from the load cell 21 with a preset upper limit value. At this time, if the running force of the handrail 3 is smaller than the upper limit, the adapter 15 is
and the electromagnet 14 are maintained in a connected state. Then, the handrail drive vehicle 6 shown in FIG.
When the rotational force of the handrail 3 increases and the running force of the handrail 3 increases accordingly, and the signal value output from the load cell 21 exceeds the upper limit value, the power to the electromagnet 14 is suddenly cut off as described above. The electromagnet 14 is
The power is turned OFF, thereby disconnecting the adapter 15 from the electromagnet 14, that is, disconnecting the detection unit 13 and the clamp indenter 7, and the measurement ends. For example, when the signal value output from the load cell 21 exceeds the upper limit value, a signal is output from the display device 19 to a control device (not shown) that controls the handrail drive vehicle 6, and thereby the handrail drive vehicle 6 stops.

In the embodiment configured in this way, the measurement can be carried out automatically without the need for a grasping action by the measurer, and therefore the running force of the handrail 3 is not applied to the measurer's body. There will be no impact and safety will be ensured.

In addition, the running force of the handrail 3 is displayed on the display device 19.
When the value exceeds the upper limit set in
Since the clamp indenter 7 is automatically separated from the indenter 3, there is no concern that an error in the measurement value will occur, and high measurement accuracy can be obtained.

Further, when the running force of the handrail 3 exceeds the upper limit value, the clamp indenter 7 is separated as described above, and excessive force is not applied to the clamp indenter 7. Therefore, the handrail of the clamp indenter 7 is 3 without causing any positional deviation from the handrail 3.
Damage to the design surface can be reliably prevented.

〔Effect of the invention〕

Since the running force measuring device for the handrail of a passenger conveyor according to the present invention is configured as described above, it can automatically measure without requiring a gripping operation by the measuring person during measurement, and has excellent safety. In addition to achieving high measurement accuracy, this method also has the effect of reliably preventing damage to the design surface of the handrail during measurement.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the running force measuring device for a handrail of a passenger conveyor according to the present invention, Fig. 2 is a cross-sectional view of Fig. FIG. 4 is a wiring diagram of the electromagnet and detection section provided in this embodiment. FIG. 5 is an explanatory diagram showing the usage state of this embodiment.
This figure is a schematic diagram of a drive mechanism for a handrail of a passenger conveyor, and FIG. 7 is a perspective view showing a conventional running force measuring device for a handrail of a passenger conveyor. 3... Handrail, 4... Balustrade, 7... Clamp indenter, 7a... Curved surface, 8, 9... Support rod, 11...
...Tightening rod, 13...Detection section, 13a...Main body, 14...Electromagnet, 15...Adapter, 16...
...Rotating body support part, 17a, 17b...Rotating body, 1
8...Tightening rod, 19...Display device, 19a...
...Transistor, 20...Relay, 20b...Contact, 21...Load cell, 22...Battery.

Claims (1)

[Claims] 1. A pair of clamping elements extending along the running direction of a handrail of a passenger conveyor, having a curved surface corresponding to the curved surface of the handrail, and movable in pairs with the handrail; a detection unit that is fixed to a supporting railing and that electrically detects a traction force applied to the clamping element as the handrail runs; and a detection unit that connects the clamping element and the detection unit to apply it to the clamping element. 1. A running force measuring device for a handrail of a passenger conveyor, comprising means for separating the clamping element from the detection section when the traction force applied exceeds a predetermined value.