JP4043400B2 - Tire puncture testing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tire puncture test apparatus, and more particularly, to a tire puncture test apparatus that can visually observe a puncture situation and further reduce the cost of the puncture test.
[0002]
[Prior art]
Conventionally, when a test for examining puncture characteristics in a pneumatic tire is performed, it is necessary to apply an internal pressure in accordance with an actual use state, and thus an actual tire has been used. Install tires on the rim, apply it to the vehicle with internal pressure applied, run various puncture factors such as actual cucumbers by changing test factors such as running speed, and perform various puncture tests I am doing so.
[0003]
Conventionally, as a device for detecting the nail treading state of a tire, for example, a device has been proposed in which a metal detector is embedded on the ground surface and the nail treading state is detected using the metal detector as a sensor (for example, a patent) Reference 1).
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 58-43808
[Problems to be solved by the invention]
However, since the inside of the tire assembled with the rim cannot be visually observed, there has been a problem that the puncture situation such as how a puncture factor member such as a nail penetrates to the inside cannot be sufficiently grasped. In addition, once used in the puncture test, the tire becomes almost unusable, so that many tires are wasted and the test cost is increased.
[0006]
An object of the present invention is to reproduce a puncture situation in which an internal pressure is applied using a tire sample piece, thereby making it possible to visually observe the puncture situation and greatly reducing the puncture test cost of the tire. It is to provide a puncture testing apparatus.
[0007]
[Means for Solving the Problems]
To achieve the above object, the present invention provides a sample piece holding means capable of holding a sample piece in a state in which gas pressure is applied to one surface of the sample piece of the tire, and a sample piece held by the sample piece holding means And a puncture factor member driving means for driving the puncture factor member, and the sample piece holding means is provided with a container capable of holding the sample piece and capable of holding an internal pressure at least partially transparent.
[0008]
According to the present invention having the above configuration, the sample piece of the tire is held by the sample piece holding means in a state where the air pressure actually used is applied, and the puncture factor member is driven into the sample piece by the puncture factor member driving means. Therefore, since the same puncture test can be performed using the sample piece without using an actual tire, many tires are not wasted as in the prior art. Therefore, the tire puncture test cost can be greatly reduced.
[0009]
Further, since at least a part of the container to which the sample piece is attached is made transparent, the puncture situation when the puncture factor member penetrates the sample piece from the transparent part can be easily observed on the spot by visual observation. Therefore, it is possible to sufficiently grasp the puncture situation.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.
[0011]
FIG. 1 shows an example of a tire puncture test apparatus according to the present invention, in which 1 is a sample piece holding means capable of holding a tire sample piece, 3 is a puncture factor member driving means for driving a puncture factor member 31 into the sample piece, Is a pressurizing means for applying pressure to the sample piece holding means 1.
[0012]
As shown in FIG. 2, the sample piece holding means 1 has a rectangular parallelepiped container 11 capable of holding an internal pressure. An opening 13 is formed in one side surface (upper side surface in the figure) 12 of the container 11, and this one side surface 12 is a holding surface for holding the sample piece S as shown in FIG.
[0013]
Both side walls 14a and 14b facing the container 11 are made of a transparent resin material so that the inside of the container 11 can be seen. Thus, by making at least a part of the container 11 transparent, the puncture state when the puncture factor member 31 penetrates the sample piece S can be observed on the spot.
[0014]
Bolts (fastening members) 16 are erected at a plurality of locations on the bottom wall 15 outside the side walls 14a and 14b. Each bolt 16 extends through the upper wall 17 to the upper side thereof. One side wall 14c between the side walls 14a, 14b is provided with a connecting portion 18 for connecting the pressurizing means 3.
[0015]
On one side surface (holding surface) 12 of the container 11, a plate-shaped holding member 19 that can hold the sample piece S between the holding surface and the sample piece S is provided. A gripping member 19 is slidably inserted into the bolt 16 and is detachably attached to a holding surface by a nut (fastening member) 20. An opening 21 for driving the puncture factor member 31 is formed in the gripping member 19 at a position coinciding with the opening 13 of the container 11.
[0016]
As shown in FIG. 3, the sample piece holding means 1 described above is arranged on the one side surface (holding surface) 12 of the container 11 and gripped by the gripping member 19 from the pressurizing means 5 into the container 11. The sample piece S is held in a state where the pressure of the applied gas is applied to one surface S1 of the sample piece S through the opening 13.
[0017]
A sample piece S shown in FIG. 3 is a sample piece of a tread portion of a tire, Sa is a sealant liner layer made of a sealant material that adheres and seals to the punctured portion when punctured, Sb is an inner liner layer, Sc is a carcass layer, Sd is a belt layer, and Se is a tread rubber portion. When testing such a sample piece S, the sea run liner layer Sa is set so as to be on the one side surface 12 side of the container 11.
[0018]
As the sample piece S of the tread portion, there are used other tires in which the sea runner liner layer Sa is disposed between the inner liner layer Sb and the carcass layer Sc, or those having no sea runner liner layer Sa. Any sample piece may be used as long as it is a sample piece of the tread portion.
[0019]
Further, the sample piece S is not limited to the sample piece in the tread portion of the tire, and any sample piece can be used as long as it is a sample piece in a portion of the tire related to puncture.
[0020]
The puncture factor member driving means 3 includes an air cylinder 32 for driving a puncture factor member 31 such as a nail into the sample piece S held by the sample piece holding means 1. The air cylinder 32 is connected to a pressure tank 33, and the pressure tank 33 is connected to an air supply source 34 that supplies high-pressure air.
[0021]
Between the air cylinder 32 and the pressure tank 33, a flow rate adjusting valve 35 and an opening / closing valve 36 are provided. By adjusting the air flow rate by the flow rate adjusting valve 35, the driving speed of the puncture factor member 31 driven into the sample piece S by the air cylinder 32 can be changed. By changing the driving speed, it is possible to perform a puncture reproduction test corresponding to an arbitrary vehicle speed.
[0022]
An open / close valve 37 and a pressure reducing valve 38 are respectively disposed between the pressure tank 33 and the air supply source 34. The pressure tank 33 is always maintained at a constant high pressure by the pressure reducing valve 38.
[0023]
The pressurizing means 5 is connected to the connecting portion 18 of the container 11 via the pipe 51, supplies air into the container 11 in which the sample piece S is set before starting the test, and the tire of the sample piece S in the container 11 Pressurize to the same pressure as the working air pressure. After pressurization, it is removed from the connecting portion 18 as necessary.
[0024]
According to the test apparatus described above, the gripping member 19 and the holding surface of the container 11 are tightened by tightening the nut 20 after the tire sample piece S is arranged in the container 11 with the sea runner layer Sa side being the holding surface side. The sample piece S is held between (a state shown in FIG. 3).
[0025]
Subsequently, air is supplied into the container 11 by the pressurizing unit 5, and the inside of the container 11 is pressurized so as to have the same internal pressure as the working air pressure of the tire of the sample piece S. As a result, the sample piece S is held by the sample piece holding means 1 in the same state as the test state performed on the actual tire.
[0026]
Next, the air cylinder 32 is activated, and the piston rod 32 a is pushed out by receiving high-pressure air from the pressure tank 33, whereby the puncture factor member 31 is driven into the sample piece S through the opening 21 of the gripping member 19.
[0027]
Therefore, since a similar puncture test can be performed using the sample piece S without using an actual tire as in the past, a large number of samples are prepared and tested without prototyping an actual tire at the laboratory level. Therefore, the puncture test cost can be greatly reduced. In addition, since the puncture test can be performed by using the sample piece S, a laboratory experiment can be easily performed in a narrower space than before.
[0028]
Moreover, since both the side walls 14a and 14b are transparent and the inside of the container 11 is visible, the puncture situation when the puncture factor member 31 penetrates the sample piece S can be easily observed on the spot. Therefore, it is possible to sufficiently grasp the puncture situation.
[0029]
Further, in the case of having a sea runner liner layer Sa that exhibits a puncture preventing effect, when the puncture factor member 31 penetrates the sample piece S, the state in which the sea run liner layer Sa seals the puncture portion is directly observed visually. Therefore, it greatly contributes to the development and improvement of tires with anti-puncture functions.
[0030]
【The invention's effect】
As described above, the tire puncture testing apparatus according to the present invention includes a sample piece holding means capable of holding the sample piece in a state where a gas pressure is applied to one surface of the tire sample piece, and the sample piece holding means. Since the puncture factor member driving means for driving the puncture factor member into the held sample piece, the test piece can be used for testing without using an actual tire. The puncture test cost can be greatly reduced.
[0031]
Further, since at least a part of the container to which the sample piece is attached is made transparent, the puncture situation when the puncture factor member penetrates the sample piece from the transparent part can be easily observed on the spot by visual observation.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing an example of a tire puncture test apparatus according to the present invention.
FIG. 2 is a perspective view showing an example of a sample piece holding means of FIG.
3 is an enlarged cross-sectional view of a main part showing a state in which a sample piece is held by the sample piece holding means of FIG. 2;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sample piece holding means 3 Puncture factor member drive means 5 Pressurization means 11 Container 12 One side surface 13 Opening 14a, 14b Side wall 16 Bolt 19 Gripping member 20 Nut 21 Opening 31 Puncture factor member 32 Air cylinder 33 Pressure tank 35 Flow control valve S Sample piece S1 One side

Claims (6)

Sample piece holding means capable of holding the sample piece in a state where gas pressure is applied to one surface of the sample piece of the tire, and a puncture factor member for driving the puncture factor member into the sample piece held by the sample piece holding means A tire puncture test apparatus comprising: a container capable of holding internal pressure and having at least a part of which has a driving means, and the sample piece holding means attaches the sample piece. The tire puncture test apparatus according to claim 1, further comprising a pressurizing unit that applies the pressure to the sample piece holding unit. The sample piece holding means opens one side surface of the container and forms the one side surface on a holding surface for holding the sample piece, while the sample piece can be held between the holding surface and the container. The tire puncture testing apparatus according to claim 1 or 2, wherein a gripping member is provided. The tire puncture testing apparatus according to claim 3, wherein the gripping member is detachably attached to the holding surface by a fastening member. The tire puncture test apparatus according to claim 1, 2, 3, or 4, wherein the puncture factor member driving means includes an air cylinder for driving a puncture factor member into the sample piece. The tire puncture testing apparatus according to claim 5, wherein the puncture factor member driving means includes a flow rate adjusting valve between the air cylinder and a pressure tank connected to the air cylinder.

Images