JPS6347082B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lighting equipment lifting device.

2. Description of the Related Art Conventionally, a lighting equipment elevating device as shown in FIG. 1 has been used as an installation device for lighting equipment installed on high ceilings of factories, gymnasiums, etc. for safe maintenance and inspection. In the figure, reference numeral 1 denotes an elevating body to which a lighting fixture 2 is attached, and the elevating body 1 is attached to the lower end of a hanging rope 4 that is let out from a winding drum 3.
The winding drum 3 is installed in a device main body 5 on the ceiling of a building, and is connected to a drive device, that is, a motor 6 via a speed reducer 7. A guide rod 9 having a locking recess 8 is provided on the upper surface of the elevating body 1.
A locking solenoid 10 that engages with the locking recess 8 when the lock is raised is provided in the main body 5 of the device. These recesses 8 and the solenoid 10 constitute a lock mechanism 10'. Further, a fixed contact 11 for power supply is provided on the lower surface of the device main body 5, and a movable contact 12 that comes into elastic contact with the fixed contact 11 is provided on the elevating body 1. That is, movable contact 1
Reference numeral 2 denotes an annular support 1 loosely fitted around the outer periphery of the guide rod 9.
2' so that it can move up and down, and the annular support 1
A contact pressure spring 13 made of a compression coil spring is provided between 2' and the upper surface of the elevating body 1 as a contact pressure applying means. Additionally, an auxiliary contact pressure spring 13' is provided between the movable contact 12 and the annular support 12'.

The fixed contact 11 and the movable contact 12 come into pressure contact with each other as the elevating member 1 further rises against the contact pressure springs 13, 13' when the elevating member 1 rises to the substantially uppermost position. 11,12
The lighting fixture 2 of the elevating body 1 from the device main body 5 side via the
Power is supplied to the At this time, the contact pressure spring 13
A reliable connection between both contacts 11 and 12 can be obtained by the strong urging force.

However, as mentioned above, since the elevating body 1 must be pulled up against the contact pressure springs 13, 13', there is a problem in that an extra load is placed on the motor 6 that drives the winding drum 3, and the deceleration is rarely performed. Aircraft 7 also needed to have that much strength. Note that after the fixed contact 11 and the movable contact 12 are connected, the lifting body 1 is locked by the locking solenoid 10, so no load is applied to the motor 6.
FIG. 2 shows the load acting on the motor 6, and the design load is taken as the sum of the weight on the lifting side due to the lifting body 1 etc. and the contact pressure. For example, if the lifting weight is 50 kg, the number of contacts is 12, the contact pressure is 2 kg per pair of contacts, and the lifting speed is 2 m/min, the output of the motor 6 is 16 W if only the lifting weight is used, but the contact When pressure is taken into account, 23W is required.

Note that if the movable contact of the elevating body and the fixed contact of the device main body are brought into contact with each other laterally, contact pressure will not act on the drive source of the winding drum when the elevating body moves up and down. However, if they contact sideways, there is a problem in that the fixed contact and the movable contact come into sliding contact when the elevating body moves up and down, which tends to cause wear. Another problem is that contact tends to be incomplete.

An object of the present invention is to provide a lighting equipment lifting and lowering device that can be lifted and lowered using a drive device with an output as small as necessary for the weight of lifting and lowering, regardless of the contact pressure of the contact points for power supply to the lighting equipment, and with less wear on the contacts. The goal is to provide the following.

An embodiment of this invention is shown in FIG. Note that the same parts as those of the lighting equipment lifting device shown in FIG. That is, in this lifting device for lighting equipment, a lifting body 1 is formed into a box shape, and a fixed pulley 14 and a movable pulley 15 are provided inside of which a hanging rope 4 is hung, and the support shaft of the movable pulley 15 is supported by a contact point. It is connected by a connecting cable 16 to an annular support 12' which is a member. The fixed pulley 14 is attached to the inner bottom surface of the elevating body 1, and the lower end of the suspension rope 4 is also connected to the inner bottom surface of the elevating body 1. The fixed pulley 14 and the movable pulley 15
The connecting cable 16 constitutes a means 17 for disabling the contact pressure spring 13.

Next, the operation of this lighting equipment lifting device will be explained. When going up and down, as shown in FIG. 3, the movable contact 12 is pulled down by the lifting rope 4 via the movable pulley 15 and the connecting rope 16 due to the weight on the lifting side. Even when the lifting body 1 is raised to the highest position by winding up the suspension rope 4 and the lifting body 1 is locked by the locking solenoid 10 as shown in FIG. 4A,
The movable contact 12 remains pulled down. Therefore, no load is applied to the motor of the winding drum 3 due to contact pressure. When the suspension rope 4 is loosened by reversing the winding drum 3 after locking, the tension on the movable contact 12 by the suspension rope 4 is released, and the contact pressure spring 13 is released.
As a result, the movable contact 12 is brought into pressure contact with the fixed contact 11 with a normal positive point pressure. At this time, the load on the motor of the winding drum 3 is zero. Therefore, both the motor and its speed reducer can be designed to minimize the weight required for lifting and lowering. FIG. 5 shows the load on the motor from lifting to locking. In addition, the hanging rope 4
Since the load acting on the winding drum 3 is constant and is only the lifting weight, the newly wound suspension rope 4 does not bite between the already wound suspension rope sections in the winding drum 3. 3 smooth rotation is obtained. Note that even when the winding drum 3 is of a manual type, the load on the winding force can be reduced in the same manner as described above.

As described above, the lighting equipment elevating device of the present invention includes an elevating body, a contact support that is placed on the elevating body via a contact pressure spring and has an upward movable contact on its upper surface, and a contact support that is suspended on the contact support. a lowered movable pulley, a fixed pulley provided on the elevating body below the movable pulley, and one end of which is connected to the lower part of the elevating body and is hung on the movable pulley and the fixed pulley in order. A device body including a suspension rope from which an elevating body is suspended, a winding drum for winding the suspension rope, a downward fixed contact provided on the lower surface of the device body and in contact with the movable contact, and the elevating body. a guide rod that is erected and has a locking recess on its side; a lock mechanism that is provided on the apparatus main body and engages with the recess of the guide rod at the rising end of the elevating body to lock the elevating body; When the lifting body is raised, contact pressure is not applied to the suspension rope, and when the lifting body is locked by the locking mechanism at the rising end and the suspension rope is loosened by reversing the winding drum, the contact pressure spring is released. The movable contact contacts the fixed contact with a normal contact pressure. Therefore, contact pressure does not act on the winding drum of the suspension rope, and the load on the motor, reduction gear, suspension rope, etc. is reduced. In addition, since the fixed contact and the movable contact are brought into contact with each other vertically,
Unlike those that contact sideways, the contacts do not rub against each other when going up and down, which has the effect of reducing wear on the contacts.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway side view of a conventional lighting device lifting device, Fig. 2 is a load diagram of its motor, Fig. 3 is a sectional view of an embodiment of the present invention, Fig. 4 is an explanatory diagram of its operation, Similarly, FIG. 5 is a load diagram of the motor. DESCRIPTION OF SYMBOLS 1... Lifting main body, 2... Lighting equipment, 3... Winding drum, 4... Suspension rope, 5... Device main body, 8... Locking recess, 10... Locking solenoid, 1
0'...Lock mechanism, 11...Fixed contact, 12...
...Movable contact, 13... Contact pressure spring, 14... Fixed pulley, 15... Moving pulley, 16... Connecting cable, 17...
Immobilization means.

Claims (1)

[Claims] 1. an elevating body, a contact support that is placed on the elevating body via a contact pressure spring and has an upward movable contact on its upper surface, a movable pulley suspended from the contact support, and a movable pulley mounted on the elevating body. a fixed pulley located below the elevating body; a suspension cable having one end connected to the lower part of the elevating body and hanging from the movable pulley and the fixed pulley in order to suspend the elevating body; a device body equipped with a winding drum for winding up the device; a downward fixed contact provided on the lower surface of the device body and in contact with the movable contact; and a locking recess provided on the side surface of the elevating body. A lighting equipment elevating device comprising: a guide rod; and a locking mechanism provided on the device main body to engage the recess of the guide rod at the rising end of the elevating object to lock the elevating object.