JP2008063111A - Passenger conveyor driving device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a passenger conveyor driving device with a safety device in breaking, capable of reducing vibration of a drive chain by a simple structure without needing a considerable setting space just above a support lever or a layout change such as shifting from the setting position of a flywheel or other members of a driving machine. <P>SOLUTION: A base end portion of the support lever 12 having a contact element 11 allowed to abut on the drive chain 5 at the tip thereof is connected with one end of a horizontal shaft member 15 rotatably supported by a bearing part 14 provided on a conveyor main frame 13. An engagement claw 16 is attached to the other end of the horizontal shaft member 15 to be suspended therefrom. The lower end of the engagement claw 15 is set so as to face a ratchet wheel 7. A steady brace member 17 is mounted on the bearing part 14 to which the base end part of the support lever 12 is attached. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a passenger conveyor drive device.

  In general, a passenger conveyor is provided with a drive device that rotates a step chain gear that circulates and moves the steps by a drive chain, and detects the breakage of the drive chain as a safety device when the drive chain rotated by this drive device breaks. Thus, a drive security device for braking the step chain gear is provided.

  Conventionally, this drive security device has an abutment that abuts the drive chain at its distal end, a support lever whose base end is attached to the conveyor main frame, and this support lever that is attached to one end and rotates together with the support lever. It is composed of a moving horizontal shaft member and an engaging claw that is attached to the other end of the horizontal shaft member. The lower end of the engaging claw is set to face the ratchet wheel attached to the step chain gear. ing. In order to reduce the vibration generated in the direction perpendicular to the longitudinal direction of the drive chain due to load fluctuations applied to the steps, the drive security device is brought into contact with the contact piece so that the contact piece contacts the drive chain. A steadying member that is supported at the contact position is provided (for example, see Patent Document 1).

Japanese Utility Model Publication No. 63-16698

  In the conventional passenger conveyor driving device disclosed in Patent Document 1, the steadying member for reducing the vibration of the abutment is arranged at the tip of the supporting lever attached to the conveyor main frame. It interferes with the installation of the flywheel or other parts of the drive machine installed directly above. For this reason, provide a considerable installation space directly above the support lever, or shift the installation position of the support lever, contactor, engaging claw, and steadying member from the installation position of the flywheel of the drive unit or other members. It is necessary to change the layout.

  The present invention aims to solve such problems, and it is not necessary to provide a considerable installation space immediately above the support lever. In addition, the installation of the support lever, the abutment member, the engaging claw, and the steadying member is not required. A drive safety device that reduces the vibration of the drive chain with a simple structure and does not require layout changes such as shifting the position from the installation position of the flywheel or other members of the drive machine, and serves as a safety device at break Provided is a passenger conveyor drive device provided.

  A driving device for a passenger conveyor according to the present invention includes a drive chain that transmits a rotational force of a driving machine to a step chain gear via a drive chain gear, and a drive security that detects breakage of the drive chain and brakes the step chain gear. The drive security device comprises a contactor that is always in contact with the drive chain, a support lever that is attached to the tip of the contactor, and a main frame of the drive device. A shaft member that rotatably supports the base end portion of the support lever by a bearing portion provided on the shaft, and an engaging claw that is attached to the shaft member and brakes the step chain gear by the rotation of the support lever; An anti-sway member attached to the bearing portion and facing the base end of the support lever to reduce vibration of the drive chain.

  According to this invention, when the drive chain vibrates, it is possible to suppress an upward view of the support lever, and to prevent the vibration of the drive chain from propagating to the drive device main body. Since an anti-sway member that reduces vibration of the drive chain is placed on the support lever, an installation space is provided directly above the support lever, and the installation position of the support lever, contactor, and anti-slip member can be It is no longer necessary to change the layout, such as shifting from the installation of the components, and the flywheel of the drive machine or other members can be installed directly above the support lever, making it possible to make the drive unit compact or simplify the structure Become.

  Exemplary embodiments of a driving device for a passenger conveyor according to the present invention will be described below with reference to the accompanying drawings.

Embodiment 1 FIG.
1 to 3 are diagrams for explaining Embodiment 1 of the present invention. FIG. 1 is a side view of a machine room provided on the upper part of a passenger conveyor. FIG. 2 is a view showing an arrow A in FIG. 3 is a diagram showing an arrow B in FIG.

  In the figure, a main shaft 1 to which a step chain gear (not shown) that circulates and moves on steps (not shown) connected endlessly on a passenger conveyor is attached to an output shaft 3 from a drive unit 2 of a driving device. The drive chain gear 4, the drive chain 5, and the main shaft drive chain gear 6 are rotated by the power transmitted through the drive chain gear 4. A ratchet wheel 7 attached to the main shaft 1 rotates integrally with the main shaft 1. Note that a flywheel 8 is connected to the drive unit 2 by a chain 9 in order to cope with load fluctuations.

  In the passenger conveyor drive device according to the first embodiment, a drive security device is provided as in the conventional passenger conveyor drive device. When the drive chain 5 is broken, the abnormality is detected and the step chain gear is braked. The drive security device 10 according to the first embodiment is configured as follows.

  That is, the base end portion of the support lever 12 provided with the abutment 11 abutted on the drive chain 5 at the distal end portion is a shaft member rotatably supported by the bearing portion 14 provided on the conveyor main frame 13. Is connected to one end of the horizontal shaft member 15. An engagement claw 16 is suspended and attached to the other end of the horizontal shaft member 15, and the lower end of the engagement claw 16 is set to face the ratchet wheel 7. Therefore, when the drive chain 5 is broken, the contact 11 is rotated by its own weight, and the rotation of the contact 11 is the rotation of the support lever 12, and the engaging claw 16 is moved via the horizontal shaft member 15. Rotate. As a result, the engaging claw 16 is engaged with the ratchet wheel 7 to brake the step chain gear and to prevent the conveyor from running away.

  Further, as shown in FIG. 3, the steadying member 17 is attached to the bearing part 14 to which the base end part of the support lever 12 is attached, and the bolt 18 that can be projected and retracted is provided on the steadying member 17. The bolt 18 is attached to the member 19 in a screwed manner, and is fixed by a nut 20 at a position where the tip of the bolt 18 is opposed to the base end of the support lever 12.

  The driving device for a passenger conveyor according to the first embodiment is configured as described above, and operates as follows to achieve an effect.

  When the passenger conveyor is operated, the tension of the drive chain 5 also changes due to increase or decrease of passengers. When the drive chain 5 resonates under a certain tension condition and vibration is generated, the contact 11 on the drive chain 5 also vibrates up and down. The support lever 12 rebounds upward with the vertical vibration of the contactor 11. At this time, the bolt 18 prevents the support lever 12 from bouncing upward, and the support lever 12 does not jump up.

  Further, since the steady member 17 is attached to the bearing portion 14 on which the base end portion of the support lever 12 is supported, even if a rotating object such as the flywheel 8 is close to the support lever 12, In addition, it is not necessary to provide an installation space immediately above the support lever 12. Further, it is not necessary to change the layout such as shifting the installation positions of the support lever 12, the contactor 11, and the steadying member 17 from the installation positions of the flywheel 8 of the driving machine 2 or other members.

  In addition, since the vibration of the drive chain 5 can be reduced by the steady member 17, it is possible to prevent the vibration from propagating to the drive device main body via the bearing portion 14 and the generation of abnormal noise. In addition, since the bolt 18 is configured to be able to protrude and retreat, the bolt 18 is in contact with the support lever 12 even when the setting angle of the support lever 12 is changed by adjustment along with the aging of the drive chain 5. Is possible. Furthermore, the steadying member 17 is composed of simple parts, and the cost can be reduced.

Embodiment 2. FIG.
Next, Embodiment 2 will be described with reference to FIG. FIG. 4 is a diagram showing the second embodiment, which corresponds to FIG. 3 of the first embodiment, in which a buffer material 40 is provided at a portion facing the support lever 12 of the bolt 18, and the others are implemented. Therefore, the same reference numerals are given to the same parts and the description thereof is omitted.

  Even in the second embodiment, the same effects as those of the first embodiment can be obtained, and even if the drive chain 5 slightly vibrates and the support lever 12 repeatedly hits the bolt 18, the cushioning material can be obtained. 40 has the effect of suppressing the generation of abnormal noise.

Embodiment 3 FIG.
Next, Embodiment 3 will be described. 5 and 6 are diagrams showing the third embodiment, and FIG. 5 is a front view of the main part of the machine room provided at the upper part of the passenger conveyor, corresponding to FIG. 2 of the first embodiment. 6 is a view showing an arrow C in FIG.

  5 and 6, the base end portion of the support lever 12 is connected to a horizontal shaft member 15 which is a shaft member rotatably supported by a bearing portion 50 provided on the conveyor main frame 13. For example, four holes 51 a to 51 d are formed in the bearing portion 50. A torsion coil spring 52 is inserted between the support lever 12 of the horizontal shaft member 15 and the bearing portion 50. One end 52 a of the torsion coil spring 52 is inserted into a hole 51 b formed in the bearing portion 50, and the other end 52 b forms a predetermined gap G with the support lever 12 and faces the support lever. . In other words, the torsion coil spring 52 is manufactured such that the gap between the other end 52b and the support lever 12 forms a predetermined gap G.

  The holes 51a to 51d formed in the bearing portion 50 are positions where the one end 52a of the torsion coil spring 52 is inserted when the setting angle of the support lever 12 is changed by adjustment along with the aging of the drive chain 5. For example, a plurality of holes can be inserted and changed from the hole 51b to the hole 51a.

  Further, the predetermined gap G is formed between the other end 52 b of the torsion coil spring 52 and the support lever 12 from the position of the support lever 12 in a state where the abutment 11 is in contact with the drive chain 5. This is to allow a smooth movement with a margin of movement.

  The driving device for passenger conveyors according to the third embodiment is configured as described above, and operates as described below to produce an effect.

  When the drive chain 5 vibrates during operation of the passenger conveyor and the gap G between the support lever 12 and the other end 52b of the torsion coil spring 52 shown in FIG. The action of returning 12 works, and the elasticity of the torsion coil spring 52 absorbs the energy of the look-back when the support lever 12 is challenged and relaxes the vibration. Since the other end 52b of the torsion coil spring 52 is not locked to the support lever 12, the support lever 12 can be freely dropped downward when the drive chain 5 is broken.

Embodiment 4 FIG.
Next, a fourth embodiment will be described. 7 and 8 show the fourth embodiment, FIG. 7 shows the main part of the drive security device, which corresponds to FIG. 5 of the third embodiment, and FIG. 8 shows an arrow D in FIG. FIG.

  7 and 8, the base end portion of the support lever 12 is connected to a horizontal shaft member 15 which is a shaft member rotatably supported by a bearing portion 70 provided on the conveyor main frame 13. An L-shaped attachment plate 71 is attached to the bearing portion 70, and a leaf spring member 73 is attached to the L-shaped attachment plate 71 with a screw 72. The leaf spring member 73 is attached to the L-shaped attachment plate 71 so as to cover the support lever 12, and the tip portion forms a gap G with the support lever 12. The other parts are the same as those in the first embodiment, and the illustration and description thereof are omitted. Further, the operation of the gap G is also the same as that in the third embodiment, so that the description thereof is omitted.

  The driving device for passenger conveyors according to the fourth embodiment is configured as described above, and operates as described below to achieve the effect.

  That is, as in the third embodiment, when the drive chain 5 vibrates during operation of the passenger conveyor and the gap G between the support lever 12 and the leaf spring member 73 shown in FIG. The action of returning the support lever 12 by the reaction force works. Further, the elasticity of the leaf spring member 73 absorbs the energy of the challenge when the support lever 12 is looked back and relaxes the swinging.

  As described above, the drive device for a passenger conveyor according to the present invention is a drive security device that prevents the escape of the conveyor due to breakage of the drive chain in the drive device that rotates the step chain gear that circulates and drives the steps of the passenger conveyor by the drive chain. It can be used for.

It is a side view of the machine room provided in the upper part of the passenger conveyor by Embodiment 1 of this invention. It is a figure which shows the arrow A in FIG. It is a figure which shows the arrow B in FIG. It is a figure which shows Embodiment 2 of this invention, and is a figure equivalent to FIG. 3 of Embodiment 1. FIG. It is a principal part front view of the machine room provided in the upper part of the passenger conveyor by Embodiment 3 of this invention. It is a figure which shows the arrow C in FIG. FIG. 10 is a diagram showing a main part of a drive security device according to Embodiment 4 of the present invention, and corresponds to FIG. 5 of Embodiment 3. It is a figure which shows the arrow D in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main shaft 2 Drive machine 3 Output shaft 4 Drive chain gear 5 Drive chain 6 Main shaft drive chain gear 7 Ratchet wheel 8 Flywheel 9 Chain 10 Drive security device 11 Contact 12 Support lever 13 Conveyor main frame 14, 50, 70 Bearing part DESCRIPTION OF SYMBOLS 15 Horizontal shaft member 16 Engagement claw 17 Stabilizing member 18 Bolt 19 Support member 20 Nut 40 Relief material 51a-51d Hole 52 Torsion coil spring 71 L-shaped attachment plate 72 Screw 73 Leaf spring member

Claims (8)

A drive device for a passenger conveyor, comprising: a drive chain that transmits the rotational force of the drive machine to the step chain gear via the drive chain gear; and a drive security device that detects breakage of the drive chain and brakes the step chain gear In
The drive security device is
An abutting element always in contact with the drive chain;
A support lever with the abutment attached to the tip, and
A shaft member that rotatably supports a base end portion of the support lever by a bearing portion provided on a main frame of the drive device;
An engaging claw that is attached to the shaft member and brakes the step chain gear by rotation of the support lever;
An anti-sway member attached to the bearing portion and facing the base end of the support lever to reduce vibration of the drive chain;
A drive device for a passenger conveyor, comprising:   2. The passenger conveyor drive device according to claim 1, wherein the position of the steadying member facing the base end of the support lever is adjustable.   3. The passenger conveyor drive device according to claim 1, wherein a cushioning material is provided at a position of the steadying member facing the base end portion of the support lever.   The anti-sway member is constituted by a torsion coil spring, one end of the torsion coil spring is engaged with a hole formed in a bearing portion, and the other end is opposed to a base end portion of a support lever. 1. A passenger conveyor drive device according to 1.   5. The passenger conveyor drive device according to claim 4, wherein a plurality of holes are formed in the bearing portion.   6. The driving device for a passenger conveyor according to claim 4, wherein the other end of the torsion coil spring and the base end portion of the support lever are opposed to each other with a predetermined gap.   2. The passenger conveyor drive device according to claim 1, wherein the steady stop member is constituted by a leaf spring member, a base end portion of the leaf spring member is attached to a bearing portion, and a distal end portion is opposed to a support lever. .   8. The passenger conveyor drive device according to claim 7, wherein a front end portion of the leaf spring member is opposed to the support lever via a predetermined gap.

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