JPS59289Y2 - spare tire carrier - Google Patents

Description

[Detailed description of the invention] The present invention relates to a spare tire carrier that fixedly supports a spare tire in a vehicle by the compressive force of an elastic body, and in particular is equipped with a mechanism to prevent the spare tire from being attached to the carrier in a loose manner. Regarding spare tire carrier.

An example of a spare tire carrier conventionally commonly used in vehicles, particularly medium- and large-sized trucks, buses, etc., will be described with reference to FIG.

In the figure, a spare tire carrier generally includes a carrier body 1 fixed to a frame F via a bracket (la), and a suspension plate 2 that supports a spare tire T and is suspended from the carrier body 1 freely. It is roughly divided into two parts.

Specifically, the hanging end of the chain 3, the upper part of which is wound around a winding mechanism (not shown) inside the carrier body 1, passes through a hole 2a formed in the center of the suspension plate 2, and the hanging end 3a An elastic body (coil spring in the figure) 6 is interposed between the washer 5 fixed via the pin 4 and the lower surface of the suspension plate 2, so that the suspension plate 2 is suspended by the carrier body 1. ing.

When installing the spare tire T, loosen the winding mechanism inside the carrier body, let out the chain 3, insert the suspension plate 2 into the hole D1 formed in the center shaft of the wheel disc D of the tire T, and Place the peripheral edge part of D1 on the upper surface of the peripheral edge part of the hanging board 2.

In this state, the head of the crankshaft 1b is rotated with a wrench or the like, the chain 3 is wound up and the hanging plate 2 is pulled, and the compressive force of the elastic body 6 moves the wheel disc D to the lower end surface of the bracket Ha on the carrier body side. The spare tire T is fixedly held by being pressed and clamped between the carrier body and the suspension plate 2.

However, in the structure of such a spare tire carrier, if the clamping force of the spare tire 1, that is, the traction force of the canoe, is not maintained above the specified level, the holding mechanism may become loose due to vibrations while the vehicle is running. The wheel disc D comes off from the suspension plate 2, and the spare tire T
There is a risk that people may end up on the street.

In such a case, a vehicle traveling from behind the vehicle may land on the spare tire T lying on the road, or in an attempt to avoid it, suddenly swerve and collide with a roadside structure or an oncoming vehicle, resulting in an emergency situation. There is a risk of causing an accident.

Therefore, it is necessary to maintain the lifting force of the carrier above the specified value, but conventionally the lifting force for iron weighing has only been determined by human senses, and it is extremely difficult to judge whether the lifting force has reached the specified value or higher. It was difficult.

In view of the conventional drawbacks, the present invention provides a spare tire loosening prevention device that can determine the lifting force of a carrier based on the amount of compression of an elastic body and display and warn the lack of lifting force with an indicator. be.

Embodiments of the present invention will be described below with reference to FIGS. 2 to 5.

Incidentally, the same reference numerals as in FIG. 1 are used for the same elements as in the prior art.

In the figure, a pair of couplings 7A and 7B with sliding mechanisms are fixed at corresponding positions on the lower surface of the carrier body 1 and the upper surface of the suspension plate 2, and the coupling 7A on the carrier body 1 side is connected to the battery.

A pair of microswitches 8A and 8b are fixedly installed on the lower surface of the suspension board 2 to be connected in parallel to the coupling 7B on the suspension board 2 side.

At this time, the movable contact 8a of the switch is opposed to the washer 5.

A pilot lamp 9 connected in series to these microswitches 8A and 8B is fixed to the suspension plate 2 or the carrier body or its vicinity (in the figure, it is attached to the carrier body) so that the blinking of the lamp 9 can be easily confirmed. Set up

The microswitches 8A and 8B are normally closed, but are configured to be opened when the movable contact reaches a certain stroke amount or more.

FIG. 2b shows the circuit before the pilot lamp 9 is turned on.

Next, the operation of the apparatus of this embodiment having such a configuration will be explained.

FIG. 2 shows a state where chain winding is started. As shown in the circuit diagram of FIG. 2, microswitches 8A and 8B are closed, but coupling 7A is closed.

Since 7B is not connected, lamp 9 to pilot 1 is not lit.

Figure 3 shows a state in which the couplings 7A and 7B are connected during the lifting process, and as is clear from the circuit diagram in Figure 3, the pilot lamp 9 is lit, and in response to the lighting instruction, the couplings 7A and 7B are connected. You can check the connection.

It is preferable that the connection start point of the couplings 7A, 7B be a suitable distance from the microswitch to the hanging plate than the hoisting completion point (shown in Figure 5).

And coupling 7A. By confirming that 7B is connected, it can be confirmed that the spare tire is set in the correct mounting position on the spare tire hanging board 2, and a lack of hoisting force due to poor setting can be prevented.

In this case, since the couplings 7A and 7B are provided above the tire, it is easy to confirm that the couplings 7A and 7B are properly connected.

Incidentally, as will be described later, similar functions can be further enhanced by providing a plurality of microswitches.

Figure 4 shows the disc wheel D in contact with the lower surface of the bracket Ha on the carrier body 1 side. In this state, the circuit diagram in Figure 4 is the same as in Figure 3, and the pilot lamp 9 remains lit.

FIG. 5 shows the completed state of hoisting, and when the chain 3 is hoisted following FIG. 4, micro switches 8A and 8
The movable contact b comes into contact with the washer 5 and is pushed up, and the elastic body 6 is compressed to a specified value by a hoisting force of a specified value.

At this time, the movable contact 8a is pushed up by a certain amount and the microswitches 8A and 8B are opened, so the circuit diagram 5b
The pilot lamp 9 is turned off as shown in FIG.

Therefore, by turning off the pilot lamp 9, it can be confirmed that the hoisting force of the carrier has reached a specified value or more.

Furthermore, if the spare tire T is installed poorly and is installed at an angle, it may cause the tire T to come off the suspension plate 2. However, in this embodiment, two microswitches are installed in parallel at separate positions. Therefore, in such an improperly installed state, one of the microswitches remains closed because the movable contact does not reach the stroke amount that would cause the switch to open.

For this reason, the pilot lamp 9 is not turned off, so it is possible to know if the spare tire T is improperly installed, and by correcting the installation properly, an accident can be prevented.

If the microswitches are installed at two or more locations at intervals, irregular mounting of the spare tire T can be more completely prevented.

Note that the microswitch 8 and the coupling 7 can be used in combination of one each or a plurality of them.

FIG. 6 and subsequent figures show another embodiment of the present invention in a state at the start of hoisting.

That is, in this embodiment, in addition to the configuration of the previous embodiment, a pilot lamp 10 is incorporated in an instrument panel (not shown), and a lighting circuit for the lamp 10 is connected to the above-mentioned microswitch 8A via a pair of couplings IIA and IIB.
, 8B parallel circuit, one coupling IIA
is fixed to the lower surface of the carrier body 1 or the lower surface of the carrier attachment body, and the other coupling 11B is fixed to the corresponding position on the upper surface of the suspension plate 2 or its related parts.

The operation of this embodiment will be explained based on the circuit diagrams shown in FIGS. 7 to 9.

FIG. 7 shows the start of lifting of the suspension board, and since the couplings 11A and 11B are not fitted like the couplings 7A and 7B, neither the pilot lamps 9 nor 10 are lit.

FIG. 8 shows a state in which the couplings are connected during lifting, and these two sets of couplings 7A.

7B, IIA, and IIB are fitted at the same time, and therefore, the pilot lamps 9 and 10 are also lit at the same time.

Figure 9 shows the completed installation of microswitches 8A and 8.
Since B is opened, pilot lamps 9 and 10 are simultaneously extinguished.

That is, the pilot lamp 10 is located on the instrument panel that can be checked from the driver's seat, and similarly to the pilot lamp 9 provided on the hanging board, it turns on and off the installation state of the spare tire T.
Can be displayed off.

Therefore, with such a configuration, even if the spare tire T becomes loose due to repeated vibrations or large shocks while the vehicle is running, the pilot lamp 10 on the small instrument panel along with the pilot lamp 9 will be removed as shown in the circuit diagram of FIG.
is lit, the driver should check the tire T in the driver's seat.
It is possible to know the state of relaxation of the body, thereby preventing accidents and further increasing safety.

In addition, in these embodiments, the coupling is fixed to a relatively primal male coupling 12A fixed to the carrier main body 1 side and to the lower peripheral edge of the hole 13 formed at the corresponding position of the suspension plate 2, as shown in FIG. If the couplings 12A and 12B are connected below the suspension plate 2, the coupling will not be damaged by the suspension plate 2 when the suspension plate 2 is inserted into the hole of the wheel disc. You can do it like this.

Furthermore, as shown in FIG. 12, if a pair of guide plates 14 for guiding the suspension plate 2 are fixed in parallel to the lower surface of the carrier body 1, the coupling can be easily and reliably connected.

In addition, the present invention connects one or more microswitches in series, each of which is normally open and closed depending on the stroke amount of the movable contact when the spare tire is installed, and when the pilot lamp lights up. It is also possible to have a configuration in which the traction force of the carrier is checked.

As described above, the present invention allows the spare tire to be properly mounted on the suspension plate by the coupling, and
Since the hoisting force of the carrier that can sufficiently guarantee reliable fixing force can be easily confirmed, loosening of the spare tire can be prevented and serious accidents can be prevented.

In addition to the pilot lamp, a buzzer or the like may be used as the indicator.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view showing a conventional spare tire carrier.
Figures 2 to 5 are longitudinal sectional views and circuit diagrams showing the operating process of the spare tire carrier according to the present invention, and Figures 6 to 10.
The figures are a longitudinal sectional view and a circuit diagram showing another embodiment of the present invention, Fig. 11 is a drawing showing an application example of the coupling, and Fig. 12 is a diagram showing an application example of the joint between the carrier body and the suspension plate. be. DESCRIPTION OF SYMBOLS 1... Carrier body, 2... Hanging board, 6... Elastic body, 7A, 7B... Coupling, 8A, 8B...
Micro switch, 9, 10...Pilot lamp,
T...Spare tire, 11a, 11b...Coupling, 12a. 12 b...Coupling.

Claims (4)

[Scope of utility model registration request] (1) Consists of a carrier main body and a suspension board that is freely suspended from the main body via an elastic body, and when the suspension board is lifted, the elastic body is placed between the carrier body or carrier bracket and the suspension board. In a spare tire carrier that presses and clamps a spare tire with the compressive force of At the same time, a detection switch is provided that switches from closed to open when the compression amount of the elastic body corresponding to the lifting force of the carrier body reaches a predetermined value or more, and is connected to a power source in series with the coupling and the detection switch. An indicator is provided on or near the carrier and/or in the operator's cabin, so that as the lifting amount of the suspension plate increases, the indicator becomes inoperable or inactive before the coupling is connected.
A spare tire carrier characterized in that it is activated when a coupling is connected, and deactivated again when the amount of compression of an elastic body exceeds a predetermined value. (2) The spare tire carrier according to claim 1, wherein the indicator is a pilot lamp or a buzzer. (3) Utility model registration claim 1, characterized in that the detection switch consists of a plurality of detection switches arranged at different positions.
The spare tire carrier according to item 1 or 2. (4) It is interposed between the upper surface of the washer, which is freely extended and contracted by a winding mechanism from the elastic carrier body, and the lower surface of the suspension plate, and the detection switch has a movable contact fixed on the lower surface of the suspension plate, and the detection switch Scope of claims for registration of a utility model, Paragraph 1~
The spare tire carrier according to any of paragraph 3.