JPS5831082Y2 - Tire support device in tire static imbalance detector - Google Patents

Description

[Detailed description of the invention] In order to detect static tire imbalance, it is necessary to correctly load the tire on the mounting stage of the detector. A regulatory piece should be established.

If the size of the tire to be inspected is limited to only one type, each restriction piece only needs to be moved slightly when loading and unloading the tire.

However, if the dimensions of the tires being inspected differ each time,
Each time, the restriction piece must be moved back to a position where the minimum size tire can be inserted and removed, and it takes a lot of time to move the restriction piece, reducing inspection efficiency.

The purpose of this invention is to improve inspection efficiency by shortening the time required to move the regulating piece even if there are many different sizes of tires to be inspected.

In this invention, a plurality of regulating pieces (usually three or four pieces) are provided on the platform so that they can move forward and backward in a radial direction while interlocking with each other, and one of the regulating pieces moves forward and backward. A plurality of limit switches are arranged along the line.

The dimensions of the tire are detected prior to inspection.

Then, in response to the size detection results, each regulation piece moves to a standby position where it contacts the corresponding limit switch.

As a result, when the tire is loaded on the platform, each regulating piece can regulate the position of the tire by only slightly moving outward, so the time required is extremely short. This can improve inspection efficiency.

Hereinafter, the invention will be explained based on illustrated embodiments.

Reference numeral 1 denotes a tire mounting base, the center of which is supported by a machine frame 3 through a hollow universal joint 2.

For this purpose, the mounting table 1 has a universal joint 2,
It can be tilted around an X axis passing along the plane of the paper and a Y axis passing perpendicular to the plane of the paper.

On the upper surface of the platform 1, there are regulating pieces 4a to 4d perpendicular thereto (of these, 4c and 4d are not shown).

) are placed.

A cylindrical base 5 extends from the regulating pieces 4a and 4b in parallel with the X-axis toward the center, and these cylindrical bases are slidably supported by columns 6 erected on the platform 1. .

Note that the illustration of the cylindrical base 5 and support column 6 of the regulating piece 4a is omitted.

Similarly, the regulating pieces 4C and 4d (not shown) also have a cylindrical base 5 parallel to the Y axis and a support 6 that slidably supports the cylindrical base 5.

Each cylindrical base 5 incorporates a female screw member 7, and a male screw rod 9 whose one end is supported by a bearing structure B near the center of the platform 1.
is screwed into the female screw member 7.

Each male screw rod 9 has a bevel gear 10, respectively.

Along the forward and backward path of the regulating piece 4a, the limit switch 11a
~11d are arranged, and these are the mounting base 1 provided on the mounting base 1.
It is attached to 2.

A control arm 13 extending from the regulating piece 4a contacts the tip of these limit switches to close them.

A bevel gear 15 and a spur gear 16 are supported on a shaft 14 installed in the center of the platform 1, and these gears are connected to each other.

The bevel gear 15 is the bevel gear 10 associated with each of the regulating pieces 4a to 4d.
mesh with each other.

The spur gear 16 meshes with a spur gear 18 directly connected to an electromagnetic brake 17 and a spur gear 20 provided at one end of a rotating shaft 19.

The rotating shaft 19 has an electromagnetic clutch 21 at the center and a spur gear 22 at the opposite end, and the spur gear 22 meshes with a spur gear 24 directly connected to an electric motor 23.

25 is a size detector for checking tire size prior to inspection.

A measuring arm 26 hangs downward from the center of the platform 1 through a center hole of the universal joint 2 and a window hole provided in the machine frame 3.

Measuring arm 26 (/i Balance weight 2 that can be moved up and down
7 in the middle.

One end of a body rod 29 is pivoted to a support structure 28 provided at the lower part of the machine frame 3. This body rod 29 is supported by the support structure 28 at the midway point by a spring 30 and an air cylinder 31. , a recess 29a formed at the tip supports the lower end of the measuring arm 26 from below.

The machine frame 3 is further provided with a support structure 32, and a fulcrum stand 33 supported by this supports the measuring rod 34 midway so as to be swingable within the XZ plane.

-i of the measuring rod 34 is connected to the measuring arm 26 by a horizontal link 35, and the other end is connected to a force coil 36 and a differential transformer 37.

A current is passed through the force coil 36 in accordance with the displacement of the measurement rod 34 in the XZ plane detected by the differential transformer 37.
A force proportional to this current is generated to keep the displacement of the measuring rod 34 at zero.

38 is an adjustment weight for adjusting the center of gravity position of the measuring rod 34, and 39 is an indicator for the current of the force coil 36.

Although not shown in the drawings, the machine frame 3 is provided with a measuring rod that has exactly the same structure as the measuring rod 34 and is movable within the YZ plane, and is also connected to the measuring arm 26.

In the above-described apparatus, the figure shows a standby state.

That is, the body rod 29 is pushed up by the air cylinder 31, and its recess 29a restricts the movement of the measuring arm 26.

Prior to inspection, the size of the tire is checked by a dimension detector 25, and the inspection signal drives an electric motor 23, which rotates through gears 24 and 22, rotating shaft 19, clutch 21, gears 20 and 16, and bevel gear 15. and 10 respectively, rotate each male threaded rod 9, and each regulating piece 4a to 4
d to the position corresponding to the detected tire inner diameter.

When each regulation piece comes to the position specified by the inspection signal, the corresponding limit switch (for example, 111) is activated by the regulation piece 4a.
When the electric motor 23 stops, the electromagnetic brake 17 is actuated and the regulating pieces 4a to 4d are stopped.

At this time, the position of each regulating piece is such that the tire to be inspected can be fitted with some margin.

Next, when the tire is placed on the platform 1 surrounding the regulating pieces 4a to 4d, a timer is activated to rotate the electric motor 23 for a certain period of time, and each regulating piece is turned outward as shown by the arrow. move it.

When each regulating piece comes into contact with the inner edge of the tire, the clutch 21 disengages and the timer stops operating, causing the electric motor 23 to stop.

The time required for this operation, ie, the timer setting time, is extremely short because the amount of movement of each of the regulating pieces 4a to 4d is small.

When the tire is properly supported on the platform 1, the air cylinder 31 is operated to pull down the body rod 29 and release the measuring arm 26.

Then, the X-direction component force of the tire unbalance is indicated by the indicator 39, and the Y-direction component force is also indicated by the same indicator, so the actual direction and amount of the unbalance is determined by the vector of the above two instructions. It is found as the sum.

When the inspection is finished, the body rod 2 is moved by the operation of the air cylinder 31.
9 is raised to restrain the lower end of the measuring arm 26 again, and then the electric motor 23 rotates to return each of the regulating pieces 4a to 4d to the position where the limit switch 11i is closed, and the tire is squeezed out from the platform 1. - complete inspection operations.

If the size of the following tire detected by the size detector 25 is the same as above, each regulation piece 4a to 4d remains at the position of the limit switch 11i, and if the size is different, each regulation piece corresponds to this. Move to position.

As described above, according to this invention, each of the regulating pieces 4a to
4d waits at a position corresponding to the tire size detected prior to the inspection, and if the size of the following tire is the same as the previous one, it remains in the same waiting position, but the size of the following tire is different from the previous one. If necessary, move to a new location and wait there.

Therefore, it is possible to significantly reduce the time required to control the tire loading position during the inspection cycle from loading the tire on the platform to finishing the inspection and discharging it, thereby improving tire inspection efficiency. It becomes possible.

[Brief explanation of drawings]

The figure is a partially longitudinal side view of an embodiment of this invention. 1... Tire mounting stand, 2... Universal joint, 3... Machine frame, 4a to 4d...
...Position regulating piece, 5...Sliding cylindrical base, 9...
...Male screw rod, 10 and 15...Bevel gear,
11a-11d...Limit switch, 13.
...Control arm of position control piece 4a, 11...
Electromagnetic brake, 21...Clutch, 23...
...Electric motor, 25...Tire dimension detector.

Claims (1)

[Scope of utility model registration request] In a tire unbalance detector having a tire mounting base tiltably supported at the center and a mechanism for detecting unbalance of weight around the center of the tire mounting base, the A plurality of position regulating pieces extending substantially perpendicular to each other are supported so as to be movable in conjunction with each other in a radial direction, and the position regulating pieces are closed by contacting each other along a movement path of the position regulating pieces. A limit switch is provided at each position corresponding to each tire size, and each position regulating piece is set to the limit position in response to the output of a tire size inspection device that operates prior to loading onto the tire mounting platform. A tire support device comprising a mechanism for moving one of the switches corresponding to the output of the tire dimension tester to a closed position.