JPH0671294U - Expansion fitting tube drive - Google Patents

Abstract

(57) [Abstract] [Purpose] It is an object of the present invention to provide a telescopic fitting tube drive device for a vehicle, which is capable of safely expanding and contracting. [Structure] A touch switch 5 that is turned on according to a vertical load and a touch switch 20 that is turned on according to a horizontal load are provided, and the telescopic fitting pipe 1 is stored when the touch switches 5 and 20 are turned on. At this time, tube 1-1 and tube 1
The coil spring 23 housed between the second and -2 absorbs the vertical displacement.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telescopic fitting tube driving device, and more particularly to an telescopic fitting tube driving device that electrically expands and contracts.

[0002]

[Prior art]

 Some automobiles have corner poles such as bumpers so that the driver can easily recognize the end of the automobile when entering the garage. Due to problems such as styling of automobiles, some of these corner poles are configured with telescopic fitting pipes so that they can be stored in the bumper when not in the garage.

[0003] Some of the retractable corner poles are configured so that they can be electrically extended / contracted from the inside of the automobile.

Conventionally, such a corner pole that can be electrically expanded and contracted has been expanded and contracted in conjunction with an ignition switch and an up / down switch provided in the vehicle.

[0005]

[Problems to be solved by the device]

 However, in the conventional telescopic fitting tube drive device, since the elevating and lowering of the telescopic fitting tube is controlled only by the ignition switch and the up / down switch, when the ignition switch and the up / down switch are operated. When the telescopic fitting pipe is lifted by, even if the telescopic fitting pipe hits an obstacle and the operator does not notice this, the telescopic fitting pipe keeps rising and continues to push the obstacle, There was a problem that the joint pipe was damaged or the obstacle was damaged on the contrary.

The present invention has been made in view of the above points, and an object of the present invention is to provide a telescopic fitting tube drive device that is capable of safely expanding and contracting.

[0007]

[Means for Solving the Problems]

 The present invention provides a telescopic fitting tube formed by telescopically fitting a plurality of tubular bodies, a flexible member having one end connected to the telescopic fitting tube and extending and contracting the telescopic fitting tube. A telescopic fitting tube drive device, comprising: a drive part connected to the other end of the flexible member, for driving the telescopic fitting tube to feed or wind the flexible member, Detecting means for detecting a load applied in the shortening direction of the telescopic fitting pipe by displacing a predetermined amount when a load of a certain value or more is applied in the shortening direction of the telescopic fitting pipe; It comprises a control means for controlling the drive part so that the fitting pipe is shortened, and a displacement absorbing means for absorbing the displacement from the telescopic fitting pipe when the displacement of the detecting means exceeds a predetermined amount. I will do it.

[0008]

[Action]

 When the detection means detects the external force acting on the telescopic fitting tube, the control means controls the drive unit to shorten the telescopic fitting tube. For this reason, if the telescopic fitting pipe hits an obstacle during extension, the telescopic fitting pipe will be shortened and the telescopic fitting pipe will not continue to extend while hitting the obstacle. The joint pipe will not be damaged or obstacles will be damaged.

Further, at this time, when the displacement of the detecting means exceeds a predetermined amount, the displacement absorbing means absorbs the displacement from the telescopic fitting tube, so the detecting means detects the load in the shortening direction of the telescopic fitting tube. It is possible to absorb the displacement of the telescopic fitting pipe during the delay time that elapses before the actual contraction of the telescopic fitting pipe.

[0010]

【Example】

 FIG. 3 shows a schematic configuration diagram of an embodiment of the present invention. In the figure, 1 indicates a telescopic fitting pipe. The expansion / contraction fitting pipe 1 is formed by expanding and contracting pipes 1-1 to 1-3 having different diameters, has conductivity, and is held by a holding portion 2 on a bumper 3 of an automobile.

An illumination portion 4 is formed at the tip of the thinnest tubular body 1-1 of the telescopic fitting tube 1 so that it can be easily recognized even at night. A touch switch 5 as a detecting means is arranged just below the illumination portion 4, and a touch switch 22 as a detecting means is arranged in the holding portion 2.

FIG. 1 and FIG. 2 show cross-sectional views of the tip portions of the tubular bodies 1-1 and 1-2. The illumination unit 4 includes an illumination pole 6, a prism 7, and a light emitting diode (LED) 8.

The illumination pole 6 is formed by molding a transparent resin or the like into a cylindrical shape. One end of the illumination pole 6 is fixed to the tip of the tube 1-1 by caulking or the like, and a rubber cap 9 is attached to the other end.

The prism 7 is formed by forming a V-shaped groove 7 a around a cylindrical transparent resin, and is housed inside the illumination pole 6 so as to be movable in the direction of arrow A.

The LED 8 is housed at the lower end of the prism 7, and the light emitted from the LED 8 is introduced into the prism 7, bent in the groove 7 a of the prism 7, etc., diffused, averaged, and illuminated pole 6 It is emitted to the outside via.

The touch switch 5 includes a holding bush 10 for holding the LED 8, a connecting member 11 for connecting to the ground, plates 12 and 13 for connecting to the connecting member 11, and a resistance for generating a potential difference at the time of switching. 14, a plate 15 for connecting the resistor 14 and the LED 8, a holding bush 10, plates 12, 13, 15, a moving bush 16 for holding and moving the resistor 14, and a coil spring for applying an urging force to the moving bush 16. It consists of 17.

The holding bush 10 is made of an insulating material and holds the terminal of the LED 8. The cathode side terminal of the LED 8 penetrates the holding bush 10 and is soldered to the plate 12 provided under the holding bush 10. Further, the anode side terminal of the LED 8 penetrates the leg portion 10a of the holding bush 10 penetrating the plate 12 and is soldered to the plate 15 provided further below the plate 12.

The plate 12 is made of a conductive material and is fixed to the upper end of a moving bush 16 made of an insulating material. The plate 13 is held in the moving bush 16, and one end of the resistor 14 is half-bonded.

The resistor 14 is held in the moving bush 16 and the other end is soldered to the plate 13.

The plate 13 is made of a conductive material and is fixed to the lower end of the moving bush 16. The bush 16 is made of an insulating material, and the plate 12 to which the cathode of the LED 8 is connected at the upper end and the plate 13 to which the anode of the LED 8 is connected through the resistor 14 at the lower end are fixed and housed inside the connecting member 11. To be done.

The connecting member 11 is made of a substantially cylindrical conductive material, and the upper and lower ends thereof are bent to connect with the plates 12 and 13, and the upper portion of the illumination member 6 and the lower portion of the tubular body 1-1 are connected to each other. Is held and fixed by the moving bush 16. The movable bush 16 is accommodated in the connecting member 11 so as to be movable in the direction of arrow A by about [mm], and the plate 12 and the plate 13 are not connected to the connecting member 11 at the same time.

A coil spring 17 is arranged below the moving bush 16 to urge the moving bush 16 upward.

The coil spring 17 is made of a conductive material, is held in a fixed bush 18, has an upper end connected to the plate 13, and has a lower end connecting a flexible tube 19 serving as a flexible member with the telescopic fitting tube 1. Connected to the connecting member 19. The connecting member 20 is made of a conductive material, and the tip of the flexible tube 19 is fixed and fixed in the fixed bush 18.

A connection line 21 for power supply penetrates through the flexible tube 19, and the tip of the connection line 21 is soldered to the connecting member 20.

In the touch switch 5, when the load is not applied to the prism 7, the bush 16 is biased upward by the coil spring 17, and the plate 12 contacts the connecting member 11.

Therefore, the current supplied via the connection line 21 is supplied to the plate 13 via the coil spring 17 and to the diode 8 via the resistor 14 and the plate 15. The current flowing through the diode 8 flows to the tube 1-1 through the plate 12 and the connecting member 11 and then to the ground, and the current flowing to the connecting line 21 is the resistor 14, the diode 8 and various types if the applied voltage is constant. It is suppressed to about 15 mA by the contact resistance and the LED8 protection resistance built in the controller 43.

In the touch switch 5, when a load larger than the biasing force of the coil spring 17 is applied to the prism 7 in the direction of arrow A, the bush 16 descends and the plate 13 comes into contact with the connecting member 11.

Therefore, the current supplied via the connection line 21 is supplied to the connection member 11 via the coil spring 17, flows into the tubular body 1-1, and flows to the ground. Therefore, the current flowing in the connection line 21 is only the contact resistance and the LED8 protection resistance built in the controller 34, and is short-circuited to the ground, so the resistance becomes smaller than in the OFF state and the current flowing in the connection line 21. Increases to about 30 mA if the applied voltage is constant.

Therefore, it is possible to detect that an unnecessary load is applied by detecting the current of the connection line 21.

The tubular body 1-1 having the illumination unit 4 and the touch switch 5 built therein is fitted to the tubular body 1-2.

A bush 22 is slidably arranged inside the tube body 1-2. A coil spring 23 is arranged above the bush 22 as a displacement absorbing means. The coil spring 23 has its upper end abutted against the bush 18 fixed inside the lower end of the tubular body 1-1, and applies a biasing force between the bush 22 and the tubular body 1-1.

A convex portion 26 is formed at a lower end portion of the tubular body 1-1, and the convex portion 26 engages with a claw portion 27 formed at an upper end of the tubular body 1-2. 1 is configured so as not to come out of the tubular body 1-2.

The bush 22 is fixed at a predetermined position with a force equal to or greater than the biasing force of the coil spring 23 when the telescopic fitting tube 1 is extended. Therefore, when the telescopic fitting pipe 1 is extended, the tubular body 1-1 is urged upward by the coil spring 23, the convex portion 26 engages with the pawl portion 27, and the upper end position of the bush 22 is raised by a distance d _0. Held in.

A spacer 24 is held by a seal member 25 at the lower end of the tubular body 1-1. As shown in FIG. 2, the spacer 24 secures the storage portion so that the coil spring 23 does not bend when the coil spring 23 contracts due to the load in the direction of arrow A.

When a load in the direction of arrow A is not applied to the tubular body 1-1 by the coil spring 23, as shown in FIG. 1, a stroke d ₁ is provided between the tubular body 1-1 and the tubular body 1-2. Is secured, the load in the direction of arrow A is applied to the pipe 1-1, the touch switch 5 is displaced, and the load in the direction of arrow A is detected. It contracts, and the displacement of the tubular body 1-1 is secured within the range of the stroke d ₁ . Therefore, even after contact with an obstacle or the like, damage of the telescopic fitting pipe 1 can be prevented during the stroke d ₁ .

The stroke d ₁ is determined by the delay time from when the touch sensor 5 detects the load to when the expansion fitting tube 1 actually starts shortening.

The cause of the delay is the displacement [1 mm] of the touch sensor 5, the time until the controller 43 determines the displacement signal, the delay time of the operation due to the inertia of the motor 42 and the speed reduction mechanism, and the operation due to the elasticity of the flexible tube. It may be due to the delay time. The displacement stroke d ₁ may be sufficiently larger than the amount by which the telescopic fitting pipe 1 rises during these delay times.

Therefore, the relationship between the delay time based on these delay factors, the rising speed of the telescopic fitting pipe 1 and the displacement stroke d ₁ is (delay time due to various delay elements) << {(displacement stroke d ₁ ) ÷ (rise speed of the telescopic fitting pipe 1)}, and the displacement stroke d ₁ can be determined from these relationships.

FIG. 4 shows a sectional view of the holding portion 2. The holding portion 2 is composed of a rubber bush 31, a contact ring 32, a screw 33 and a rubber seal 34. The screw 33 is screwed from the front side of the bumper 3 into the ball holding portion 35 arranged on the back side of the bumper 3, and the bump screw 3 is sandwiched between the screw 33 and the pole holding portion 35 via the rubber bush 31. A pole holding portion 35 is held on the bumper 3.

The upper end of the tube body 1-3 is held by a rubber seal 34 arranged on the inner circumference of the screw 33. A contact ring 32 is disposed immediately below the rubber seal 34 so as to surround the tube body 1-3. The contact ring 32 is in a non-contact state in a normal state where stress is not applied to the tube body 1-3, and the rubber seal 34 is a closed tube when a force is applied to the tube body 1-3 in the direction of arrow B, for example. The body 1-3 contacts the contact ring 32.

The contact ring 32 is connected to the connection cord 36 branched from the connection line 21 for supplying power to the LED 8 and the tube body 1-3 is grounded. When the tube body 1-3 and the contact ring 32 come into contact with each other due to the load applied and the rubber seal 34 being expanded, the connection line 21 is grounded and the potential of the connection line 21 decreases. As a result, it can be seen that unnecessary force is applied to the telescopic fitting pipe 1.

One end of a flexible tube 19 is connected to the telescopic fitting tube 1, and the other end is fixed to the pulley of the drive unit 41. The drive unit 41 contains a pulley, a reduction gear, and the like, and is driven by a motor 42 to wind up and pull out the flexible tube 19.

The motor 42 is connected to the controller 43, the rotation direction is controlled by a drive signal from the controller 43, and the winding and withdrawing of the flexible tube 19 is controlled. The controller 43 is connected to the connection line 21 in addition to the motor 42, lights the illumination unit 4 and detects the current of the connection line 21, controls the motor 42 according to the current value, and controls the connection line 21. The electric current is detected, and the motor 42 is controlled according to the electric current value to control the expansion and contraction of the telescopic fitting pipe 1. Further, the controller 43 is connected to an ignition switch and up / down switches of the telescopic fitting pipe, and the up / down of the telescopic fitting pipe 1 is controlled by operating these switches.

FIG. 5 shows an operation explanatory diagram of the controller 43. When the ignition (IGN) switch is turned on, the controller 43 drives the motor 42 in the forward rotation direction, and the flexible tube 19 is pulled out from the pulley, so that the telescopic fitting tube 1 extends and the connecting line. A current is supplied to 21 to turn on the LED 8 (steps S1 and S2).

When the ignition switch is turned on and the telescopic fitting pipe 1 is extended, or when the vertical touch switch 5 and the horizontal touch switch 22 are turned on due to an obstacle or the like after the extension, the telescopic fitting pipe 1 is It is shortened and stored in the bumper 3 (steps S3, S4).

When the up switch is turned on while the telescopic fitting pipe 1 is shortened, the telescopic fitting pipe 1 is extended again (steps S5 and S2).

When the down switch is turned on while the expansion fitting pipe 1 is extended, the expansion fitting pipe 1 is shortened (steps S6 and S4).

Further, when the ignition switch is turned off, the telescopic fitting pipe 1 is shortened regardless of the up switch and the down switch (steps S7 and S8).

As described above, the vertical and horizontal touch switches 5 and 22 are provided, and when the collision with the obstacle is detected, the expansion fitting pipe 1 is housed in the bumper 3, so that the expansion fitting pipe 1 It is possible to prevent damage to the surroundings and damage to surrounding articles due to the telescopic fitting pipe 1. Further, at this time, even if there is a delay time between the touch switch 5 detecting an obstacle or the like and the expansion fitting tube 1 actually starting to shorten, the stroke d ₁ absorbs the delay time. However, the expansion fitting pipe 1 can be more reliably prevented from being damaged.

[0050]

[Effect of device]

 As described above, according to the present invention, when an external force is applied to the telescopic fitting pipe, the telescopic fitting pipe is shortened. This prevents the obstacle from being damaged, and at this time, the displacement absorbing means absorbs a displacement larger than the displacement amount for detecting the load applied in the shortening direction of the expansion / contraction fitting pipe at the detection stage, so the detection is performed. It is possible to absorb the displacement that causes the delay time from when the load is detected by the means until the expansion fitting pipe is actually shortened. Therefore, it is possible to avoid unnecessary load on the expansion fitting pipe. Have.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an embodiment of the present invention.

FIG. 2 is a sectional view of an essential part of an embodiment of the present invention.

FIG. 3 is a schematic configuration diagram of an embodiment of the present invention.

FIG. 4 is a sectional view of a holding portion according to an embodiment of the present invention.

FIG. 5 is an operation explanatory diagram of the controller according to the embodiment of the present invention.

[Explanation of symbols]

 1 Expansion fitting pipe 1-1, 1-2, 1-3 Tube body 2 Holding part 3 Bumper 4 Illumination part 5 Vertical touch switch 6 Illumination pole 7 Prism 8 LED 20 Horizontal touch switch 22 Bush 23 Coil spring 24 Spacer 25 Seal member 41 Drive unit 42 Motor 43 Controller

Claims (1)

[Scope of utility model registration request] 1. An expansion / contraction fitting pipe formed by elastically fitting a plurality of pipe bodies, a flexible member having one end connected to the expansion / contraction fitting pipe and expanding / contracting the expansion / contraction fitting pipe, A telescopic fitting tube drive device, comprising: a flexible member connected to the other end thereof; and a drive section for feeding or winding the flexible member to drive the telescopic fitting tube. Detecting means for displacing a predetermined amount when a load equal to or more than a certain value is applied in the shortening direction, and detecting a load applied in the shortening direction of the telescopic fitting pipe; and when the detecting means detects the load, It comprises a control means for controlling the drive part so that the fitting pipe is shortened, and a displacement absorbing means for absorbing the displacement from the telescopic fitting pipe when the displacement of the detecting means becomes a predetermined amount or more. Expandable fitting tube drive device.