JPS6338593B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to, for example, a television mounting stand, a large lighting equipment moving stand, a device for setting the position for checking sound effects in an audio device, a large video projector device, and a projection device. Regarding a telescopic moving device that supports equipment such as a screen device (hereinafter referred to as a heavy object) on the tip of a multi-stage telescopic pole, moves it to a desired height, back and forth position, and holds it at that position, especially for supporting heavy objects. The present invention relates to a manual telescopic movement device in which a multi-stage telescopic pole is configured to be manually telescopically operable.

[Conventional technology]

As the above-mentioned telescopic moving device, the present applicant had previously proposed an electrically powered prior art as shown in Fig. 1 in Utility Application No. 1422-1983 (Patent Publication No. 122849-1988). .

Here, the prior art will be explained based on FIG. 1. In FIG. 1, reference numeral 1 is a storage case, and on the back side of this storage case 1 there is a back plate 2 that covers the back opening.
is removably fixed thereto, and a telescopic drive section 3 and a telescopic driven section 4 are disposed in pairs at left and right positions inside the storage casing 1.

In the telescopic drive unit 3, a support case 5 whose side portions are covered with a cover 8 is fixed via a pedestal 7 fixed to the bottom plate of the storage case 1, and an electric motor 6 is attached to the support case 5. The base pole 9 of the multi-stage telescoping pole is fixed at an upward angle of about 20 degrees with respect to the horizontal plane. 1
1 are assembled so as to be expandable and retractable. Although not shown inside the support case 5, the electric motor 6
A feed gear that rotates via a clutch mechanism by forward and reverse rotation of the drive gear is built in, and the second stage pole 11 is connected to the front end of a flexible drive cable that engages with this feed gear.

A support case 5' is attached to the other telescopic driven part 4 via a pedestal 7', and the first and second stage poles 10', 11 are connected to the base pole 9' of the multi-stage telescopic pole attached to this. ′ is assembled so that it can expand and contract. The rotating shaft 12' extending from the telescopic drive unit 3 is driven by the rotating shaft 12' via the connecting shaft 13, thereby driving the feed gear housed in the case 5'. The structure is almost the same as that of the telescopic drive unit 3 except for the lack of a clutch mechanism.

A heavy object support stand 15 is constructed and connected to the tips of the second-stage poles 11, 11' of the above-mentioned telescopic drive unit 3 and telescopic driven unit 4 via angle adjustment pin joints 14, 14', A heavy object 16, specifically, a mirror of a video projector device, is fixed to this support stand 15.

With this configuration, when the electric motor 6 is driven, the feed gear is rotated in the forward and reverse directions via the clutch mechanism, and the flexible drive cable that engages with the gear is pushed out or pulled in, thereby creating a multi-stage telescopic pole. Because of the telescopic movement, it is possible to move the heavy object 16 supported at the tip of the multi-stage telescopic pole to the desired height and back and forth position, and when the telescopic movement is completed and an overload occurs, the clutch mechanism is disconnected and the clutch mechanism is activated. Since the provided contacts are opened and the drive of the electric motor is stopped, the heavy object 16 can be held at the moving position.

[Problem that the invention seeks to solve]

By the way, the telescopic moving device according to the prior art described above uses an electric motor to extend and retract the multi-stage telescopic pole, but if the target heavy object supported at the tip of the multi-stage telescopic pole is relatively light, the user It is conceivable that the multi-stage telescopic pole can be manually pulled out and expanded or contracted by pushing it in. If the pole is manually operated in this way, the structure will be simpler than the automatic type using an electric motor as described above, and the telescopic movement device will be The advantage is that it can be provided at a low price.

However, when providing the above-mentioned manual telescoping device, there are the following problems.

That is, in the automatic telescopic moving device described above, when the multi-stage telescopic pole is fully extended, the heavy object supported at the tip of the multi-stage telescopic pole is transferred from an electric motor to a power transmission means having a worm and a worm wheel, for example, The driving force is transmitted through the clutch mechanism, the feed gear, the drive cable, the base end of the second stage pole, and the support for the heavy object, and there are many meshing parts of the gears and a large reduction ratio in the driving force transmission path. Since the multi-stage telescopic pole is provided with a power transmission means having a power transmitting means, it is possible to reliably prevent the multi-stage telescopic pole from shortening even when the load of a heavy object or an external force is applied in addition to the load of a heavy object.

However, in the case of a manual telescopic moving device, it is preferable that these devices can be operated easily so that the multi-stage telescopic pole can be pulled out and pushed in by human power. It is difficult to hold the multi-stage telescopic pole, especially when external force is applied, and there is a risk that the multi-stage telescopic pole may be shortened inadvertently, causing an unexpected accident such as injury.

The present invention was proposed for the purpose of providing a manual telescopic movement device that does not cause the above-mentioned inconveniences.

[Means for solving problems]

In order to achieve this object, the present invention provides: (A) a multi-stage telescoping pole that supports a required heavy object at its tip and is extendable and retractable by manual operation; (B) a base pole of the multi-stage telescoping pole is fixed and (C) a base case that is pivotally supported to be swingable in a direction intersecting the pole axis; a flexible drive cable connected to a small-diameter pole; (D) when the multi-stage telescopic pole is extended, it is engaged with the drive cable or feed gear to maintain the extended state, and the said engagement is maintained by swinging of the multi-stage telescopic pole; The device is characterized by comprising a lock mechanism that releases the lock.

[Effect]

In such a configuration, when the multi-stage telescoping pole is extended by manual operation, the locking mechanism engages with the flexible drive cable connected to the smallest diameter pole of the multi-stage telescoping pole or its feed gear, and the multi-stage telescoping pole is extended. Since it is held in an extended state, there is no possibility that the multi-stage telescoping pole will be inadvertently shortened due to the load of a heavy object or external force.

Furthermore, when the tip of the multi-stage telescopic pole is grasped and the multi-stage telescopic pole is swung together with the base case, the engagement by the locking mechanism is released and the multi-stage telescopic pole can be shortened by manual operation.

Even if a multi-stage telescopic pole supporting a necessary heavy object at its tip is configured to be manually extendable and retractable, the problem is that the extended multi-stage telescopic pole may inadvertently shorten, causing accidents such as injury. is resolved.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 2 to 4.

In FIG. 2, reference numeral 1 is a storage case, and 9, 10, 11 are base poles of a multi-stage telescopic pole,
The first-stage pole and the second-stage pole have substantially the same structure as that of the electric telescopic moving device shown in FIG. 1 described above.

The base pole 9 of the multi-stage telescopic pole is fixed to a die-cast base case 17, and this base case 17 has a cover 30 as shown in FIG.
is fixed. The base case 17 is pivotally connected to a pedestal 19 via a fulcrum pin 18 so as to be able to swing up and down, and the pedestal 19 is fixed to the bottom of the storage case 1. A first stage pole 10 is fitted into the base pole 9, and a slide bush 20 that slides on the inner surface of the base pole 9 is fitted and fixed to the base end of the first stage pole 10. A slide bush 21 that slides on the inner surface of the first stage pole 10 is fitted and fixed to the base end of the first stage pole 11.

Note that the structure of the tips of the base pole 9, first-stage pole 10, and second-stage pole 11 is such that a heavy object support is provided at the end of the second-stage pole 11, and the heavy object is mounted and supported on this support. The configuration is similar to that shown in FIG.

Upper and lower cable holders 2 are attached to the slide bush 21 screwed onto the base end of the second stage pole 11.
The front end of a flexible drive cable 24 is fixed through the cables 2 and 23, and feed holes 24a (see FIG. 4) are formed in the drive cable 24 at predetermined intervals along the longitudinal direction. . In addition, the drive cable 24 is connected to the first stage pole 10 → a slide bush 20 that is fitted and fixed to the base end of this pole.
It is inserted into the case 17 through the base pole 9 and the guide sleeve 26 fixed to the case 17 with a fixing screw 25, and is engaged with a feed gear 28, which will be described later. Also drive cable 2
4, when the multi-stage telescopic pole is extended, the rear end is located at the outer periphery of the lower half of the feed gear 28, and when the multi-stage telescopic pole is shortened, the rear end is located in the storage housing 1.
It has a length such that its rear end is inserted into the protective tube 2 fixed therein, and has a cross-sectional shape similar to that of a feeder cable. The feed gear 28 is made of a synthetic resin molded product having a hole 28a, and a drive cable 2 is attached to the outer periphery as shown in FIG.
Flanges 28b for supporting both sides of 4 are formed,
Furthermore, a shaft 17 integrally formed with the base case 17
It is rotatably supported by a.

Further, in FIGS. 2 and 3, reference numeral 31 indicates a lock mechanism. This locking mechanism 31 is connected to the base 19.
A lock pawl 3 is attached to a pivot 32 fixed to the side plate 19a of the
The proximal end of the locking claw 33 is fitted in a vertically swingable manner, and the locking claw 33 is moved in the locking direction by a spring 34 whose both ends are latched across the claw 33 and the side plate 19a, as shown in FIG. , that is, it is energized in the counterclockwise direction in FIG. Further, the tip of the lock claw 33 is connected to the slit 17 formed in the base case 17.
The slit 17b allows the distal end of the lock claw 33, which is inserted into the case 17 when the multi-stage telescopic pole is extended, to be engaged with the rear end of the drive cable 24. , the opening is positioned slightly behind the rear end. Further, a lock release protrusion 35 is integrally formed on the outer surface of the lower part of the base case 17, and this protrusion 35 comes into contact with the lock pawl 33 when the base case 17 rotates due to the upward movement of the tip end of the multi-stage telescopic pole. , which can be moved downward, ie, clockwise in FIG.

One synchronizing gear 36 is meshed with the upper part of the feed gear 28, the other synchronizing gear is fitted onto the shaft 37 of this gear 36, and this synchronizing gear is meshed with the other feeding gear. , the left and right multi-stage telescoping poles are driven synchronously when the multi-stage telescoping pole is extended or contracted. Further, a fan-shaped gear 38 is provided near the protrusion 35 on the base case 17, and one synchronization gear is fitted into this gear 38, and this synchronization gear is meshed with the other fan-shaped gear.
The left and right locking mechanisms are driven synchronously when the multi-stage telescopic pole is locked and unlocked.

Although the above explanation has mainly focused on one side of the pair of left and right multi-stage telescoping poles, substantially the same structure is used on the other side as well. Also the third
In the figure, numeral 41 is a bush for supporting the fulcrum pin 18, and 42 is a lock pawl 3 fitted on the pivot 32.
This is the washer for preventing it from falling off.

Next, the operation of the manual telescopic moving device configured as above will be explained.

When the multi-stage telescopic pole is shortened, the tip of the lock claw 33 is simply in contact with the drive cable 24, so only one user (operator)
can pull out the multi-stage telescopic pole parallel to the axial direction by grasping both sides of the support provided at the tip of the multi-stage telescopic pole, and when the multi-stage telescopic pole is fully extended, the multi-stage telescopic pole can be pulled out from the base end of the base pole 9. Minimum diameter 1
The distance to the tip of the step pole 11 is approximately 1000 mm, but in this extended state, the rear end 24b of the drive cable 24 is located slightly in front of the slit 17b in the case 17, so the tip of the lock claw 33 is attached to the spring. The biasing force 34 causes the drive cable 24 to protrude into the case 17 from the slit 17b and engage with the rear end of the drive cable 24, thereby preventing its rearward movement. Therefore, even if not only the load of a heavy object mounted and supported on the support base but also an external force in the direction of shortening the pole is applied, the drive cable 24 is locked and does not move backward, so that the multi-stage telescopic pole can be shortened. It is held in an extended state without any movement.

In addition, in order to reduce the size of the multi-stage telescopic pole, the lock by the lock claw 33 is released, but this can be done by grasping both sides of the support body and lifting the tip side of the multi-stage telescopic pole. Then, the case 17 rotates about 8 degrees around the fulcrum pin 18. In this case, it is preferable to press the base end of the multi-stage telescopic pole with a presser member (not shown) at the limit of rotation, and the base case 17 is placed on the pedestal 19 by gravity before rotation. Due to the above rotation, the tip of the multi-stage telescopic pole will be approximately
As the base case 17 rotates, the lock release protrusion 35 moves, and this protrusion 35 comes into contact with the lock pawl 33 and pushes it down, causing the lock pawl 33 to move as shown in Fig. 2. The tip of the lock pawl 33 comes out of the slit 17b of the base case 17 downward. This releases the lock, and the multi-stage telescopic pole can be shortened by pushing the multi-stage telescopic pole.

In this case, the lock claw 33 is inserted into the slit 17.
Since all you have to do is get out of b, you actually only need to lift it by an angle less than 8 degrees. Also, lock claw 3
3 is biased in the locking direction by a spring 34, so when the multi-stage telescopic pole is extended or contracted, it comes into contact with the thick parts on both sides of the drive cable 24 and slides. However, what is required is to prevent and lock the rear end of the drive cable 24 from moving rearward.
The spring 34 is weak, and depending on the angle and shape of the locking pawl 33, especially the tip thereof, the locking pawl 33
It is preferable that the drive cable 24 not rotate in the unlocking direction due to force from the drive cable 24. and drive cable 2 from the tip of lock claw 33.
After the rear end of the multi-stage telescopic pole is located at the rear, the multi-stage telescopic pole can be shortened by simply pushing the multi-stage telescopic pole without having to lift it up.

Furthermore, in this embodiment, the extension and shortening operations of the multi-stage telescopic poles are achieved by fitting the synchronizing gear 36 that meshes with the feed gear 28 to the shaft 37, so that the left and right multi-stage telescopic poles extend and contract in synchronization. The swinging of the case 17 is achieved by fitting the synchronizing gear 39 that meshes with the fan-shaped gear 38 of the case 17 onto the shaft 40, so that the left and right cases 17 swing synchronously, so that the telescopic lock operation is stable. You can definitely do it.

In addition, in the present invention, in the above embodiment, the base case, which is a swinging member, is moved up and down in the lifting direction of the multistage telescopic pole to release the lock, but the The locking mechanism may be a locking mechanism that releases the lock by swinging the base case in the left-right direction, for example, or may be a locking mechanism that locks the rotation of the feed gear.

〔Effect of the invention〕

As explained above, according to the present invention, when the multi-stage telescoping pole is extended by manual operation, the locking mechanism engages with the flexible drive cable connected to the smallest diameter pole of the multi-stage telescoping pole or its feed gear. Since the structure is such that the multi-stage telescopic pole is held in an extended state by holding the multi-stage telescopic pole in an extended state, the multi-stage telescopic pole will not be inadvertently shortened even when a heavy load or external force is applied. When the pole is moved, the engagement by the locking mechanism is released and the multi-stage telescoping pole can be shortened, so even if the multi-stage telescoping pole that supports a heavy object is configured to be a manual type that can be extended and contracted by manual operation, the multi-stage telescoping pole can be extended. This solves the problem of the poles being shortened carelessly and causing accidents such as injuries.

Therefore, according to the present invention, since the telescopic moving device for heavy objects can be configured manually, there is no need to provide an electric motor or a clutch mechanism, and it is possible to provide an inexpensive telescopic moving device with a simple structure.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing an example of an automatic telescoping moving device that is a prior art of the present invention, and FIG. 2 is a side view showing a partially sectional main part of an embodiment of the present invention.
FIG. 3 is a partially sectional plan view of the lock mechanism, and FIG. 4 is a sectional view showing a portion of the drive cable and feed gear. 9, 10, 11... Base pole of multi-stage telescopic pole, first stage pole, second stage pole, 17... Base case, 18... Fulcrum pin, 19... Pedestal, 24
...Drive cable, 28 ...Feed gear, 31
...Lock mechanism, 33...Lock pawl, 34...Spring, 35...Lock release protrusion.

Claims (1)

[Claims] 1. A multi-stage telescoping pole that supports a required heavy object at its tip and is extendable and retractable by manual operation, and a base pole of the multi-stage telescoping pole is fixed and pivotally supported to be swingable in a direction intersecting the pole axis direction. a base case; a flexible drive cable that is engaged with a feed gear pivotally supported within the base case and whose front end is connected to the smallest diameter pole of the multi-stage telescoping pole;
It is characterized by comprising a lock mechanism that is engaged with the drive cable or feed gear when the multi-stage telescopic pole is extended to maintain the extended state, and is released from the engagement by swinging of the multi-stage telescopic pole. Manual telescopic movement device.