JP2001018180A - Hood opening jig for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically horizontally open a hood where its opening is necessary, by incorporating a spring of shape memory alloy extending a support shaft by a prescribed stroke by a temperature. SOLUTION: A lower hook 6 is provided in both ends of a cross bar 5 fixed to a cylindrical unit 2 by crossing therewith under the cylindrical unit 2, a support shaft 7 is inserted slidably in an axial line direction in the cylindrical unit 2, and an upper hook 8 is provided in an upper end of this support shaft 7. A spring 11 of shape memory alloy extending the support shaft 7 by a prescribed stroke by a temperature is incorporated into the cylindrical unit 2. The lower hook 6 is hook locked to a bumper mounting hole, and the upper hook 8 is set by hook locking it to a hood lock part provided in a tip end of a closed hood. In this condition, in a drying process after painting of finish coating, the spring 11 of shape memory alloy is extended by a temperature in a drying furnace, and the support shaft 7 is lifted, to automatically open the hood and position it horizontally lifted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle hood opening jig for automatically opening a vehicle hood to a predetermined position.
The vehicle hood includes an engine room hood, a luggage compartment door, and a back door.

[0002]

2. Description of the Related Art In a vehicle painting process, as shown in FIG. 7, an engine room hood W (hereinafter referred to as a hood) attached to a body B so as to be openable and closable is opened horizontally by a jig 20. As shown in FIG. 9, the coating process of the vehicle includes a cleaning process of cleaning a vehicle to be carried into the overcoat booth 30, and a overcoating process of overcoating with an automatic coating machine 31 installed in the overcoat booth 30. A drying step of drying the top coat in the drying furnace 40 and an inspection step of inspecting the coating state of the vehicle exiting the drying furnace 40 are performed.

The reason why the hood W is opened horizontally by the jig 20 is that the hood W is inclined downward toward the front of the vehicle when the hood W is closed. The top coat is applied in this state, but if the process proceeds to the drying step in this state, the downward inclined surface of the hood W causes the painted surface that has not been baked and solidified to move downward, and the upper painted surface becomes thinner and becomes thinner. It becomes bad and the lower part becomes thick and glossy. Also,
The lower part causes sagging and flow of the coating film, resulting in poor coating. In order to prevent this, the hood W is leveled by the jig 20 and dried.

As shown in FIG. 8, a conventional jig 20 for opening the hood W horizontally has a horizontal bar 5 fixed to the lower end of a vertical axis 21 in a T-shape, and lower hooks are attached to both ends of the horizontal bar 5. 6, the upper hook 8 is provided at the upper end of the vertical axis 21, the handle 3 is attached to the vertical axis 21, and the handle 4 is attached to the horizontal axis 5. The jig 20 holds the lower hood 6 in a bumper mounting hole and the upper hook 8 in a hood lock portion to horizontally open and support the hood W. Therefore, the vertical axis 21 is set to a length at which the hood W is lifted horizontally.

[0005]

The operation of mounting the jig 20 and horizontally opening the hood W is immediately after the overcoating by the automatic coating machine 31 and immediately before the transfer to the drying furnace 40 in FIG. This is because when the hood W is opened horizontally before the automatic coating machine 31, paint dust such as enamel or clear penetrates into the back side of the hood W or in the engine room and sprays, thereby causing poor appearance such as color difference. . Accordingly, as shown in FIG. 9, the workers in the conventional painting process include a cleaning process worker 60, a jig setting dedicated worker 61, and an inspection process worker 6.
2 requires a minimum of 3 workers.

Further, when the hood W is opened, the operator needs to lift the closed hood 20. Therefore, the labor burden for continuously lifting the hoods W of a large number of vehicles is large.

An object of the present invention is to provide a hood opening jig for a vehicle in which a dedicated operator for setting the hood opening jig is abolished, and the hood opening jig is automatically opened horizontally where opening is required. .

[0008]

According to the present invention, there is provided a jig for automatically opening a hood of a vehicle to a predetermined position, wherein a lower hook is fixed below a cylindrical body. And a built-in support shaft having an upper hook provided at an upper end thereof slidably inserted into the cylindrical body and a shape memory alloy spring for extending the support shaft by a predetermined stroke depending on temperature. .

A jig for automatically opening a hood of a vehicle to a predetermined position is provided with a lower hook fixed below a cylindrical body, inserted slidably in the axial direction into the cylindrical body, and provided at an upper end thereof. A support shaft having an upper hook, and a built-in shape memory alloy spring that extends the support shaft at a predetermined stroke depending on temperature, and a guide cylinder is fixed to a side portion of the cylinder with a parallel axis to the cylinder, A guide shaft coupled to the support shaft is slidably guided in the guide cylinder in the axial direction.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, reference numeral 1 denotes a jig of the present invention. In the jig 1 according to the present invention, lower hooks 6 are provided at both ends of a horizontal bar 5 fixed to the cylinder 2 so as to intersect the cylinder 2 below the cylinder 2, and a support shaft 7 is provided in the cylinder 2. It is slidably inserted in the axial direction, and has an upper hook 8 at the upper end of the support shaft 7. The cylindrical body 2 has a built-in structure memory alloy spring 11 for extending the support shaft 7 at a predetermined stroke depending on the temperature.

The upper end of the spring 11 built in the cylindrical body 2 is connected to the lower end of the support shaft 7 via a flanged screw 12 to prevent the support shaft 7 from being entangled with the spring 11. Also,
The lower end of the spring 11 has an end cap 13 which can be attached to and detached from the lower end of the cylindrical body 2 as a spring receiver, so that the spring 11 can be cleaned or replaced.

The shape memory alloy spring 11 stores a change in shape so that the stroke length of the support shaft 7 for lifting the hood to a horizontal position at a certain temperature or higher in a drying oven. Therefore, it is desirable to make a hole in the cylindrical body 2 so that the spring 11 absorbs the temperature quickly.

The upper hook 8 at the upper end of the support shaft 7 may be bent at an acute angle as shown in FIGS. 1 and 2, but as shown in FIG. However, it is desirable that the support shaft 7 has a wide receiving surface shape so that no resistance is applied to the support shaft 7.

Further, a guide cylinder 9 is fixedly mounted on the side of the cylinder 2 in an axial direction parallel to the cylinder 2, and a guide shaft 10 connected to the support shaft is slidable on the guide cylinder 9 in the axial direction. invite. The guide shaft 10 guides the support shaft 7 smoothly in the axial direction, and stops the support shaft 7 from rotating so that the position of the upper hook 8 is fixed.

In the jig 1 of the present invention, the conventional jig 20
Similarly, the handle 3 is attached to the cylindrical body 2 and the handle 4 is attached to the horizontal axis 5.

Since the present invention has the structure as described above, the lower hook 6 is hooked on the bumper mounting hole 15 and the upper hook 8 is provided at the end of the hood W which is closed as shown in FIG. Hook the hood lock unit 14 and set. In this state, in the drying step after the top coating, the spring 11 of the shape memory alloy is extended by the temperature in the drying oven, the support shaft 7 is raised, the hood W is automatically opened, and the hood W is lifted horizontally as shown in FIG. You do it.

As shown in FIG. 6, when the jig 1 is set on the closed hood W, the jig 1 uses the lower hook 6 as a fulcrum as shown by a solid line. Although inclined toward the hood W, the support shaft 7 is raised by the length A in which the spring 11 is extended due to the extension of the spring 11, and the posture of the jig 1 is such that the lower hook 6 is the fulcrum and the vertical axis is as shown by a dotted line. Then, the hood W is lifted to a horizontal position as indicated by a dotted line with the hood hinge serving as a fulcrum 16.

Therefore, by using the jig 1 of the present invention, it is possible to eliminate the jig setting dedicated operator. That is, conventionally, as described above, at least three workers, ie, the cleaning process worker 60, the jig setting dedicated worker 61, and the inspection process worker 62, are required. As described above, when the hood W is opened horizontally before, paint dust such as enamel and clear penetrates into the back side of the hood W and the engine room, causing the appearance such as spraying and color difference to be poor.

However, the jig 1 of the present invention automatically opens the hood W in the drying step 40, and the spring 11 is contracted in the topcoating step before the drying step 40. Therefore, as shown in FIG. 10, even when the jig 1 is set in the cleaning process, the hood W passes through the automatic coating machine 31 in a closed state where the paint dust does not enter and opens horizontally in the drying process 40. Is obtained. Therefore, the jig 1 can be set by an operator in the cleaning process, and the conventional jig setting dedicated operator 61 is not required. Even if the jig 1 is set at the initial stage of the top coating process, the spring 11 is
Is prevented from spraying paint dust during the topcoating process, and the spring 11 is not stained.

Inspection step 50 in a drying furnace in drying step 40
At this time, the spring 11 gradually contracts due to the temperature drop at room temperature, and the hood W, which has been lifted horizontally, is automatically returned to the closed state. Therefore, the jig 1 is removed from the body by the worker 62 in the inspection process 50.

The jig 1 of the present invention can be adapted to any vehicle type by changing the position of the lower hook 6.
Since the spring 11 in the cylinder 2 can be freely replaced,
Since the length and the holding load can be easily changed, it can be applied to any vehicle type. In the above embodiments, the engine room hood W has been described, but the present invention can be applied to a luggage compartment door or a back door.

[0022]

As described above, according to the present invention, in order to secure the coating quality, the spring of the shape memory alloy is extended by the temperature in the drying furnace in the drying step after the top coat coating, and the support shaft is raised to raise the hood. Since it is automatically opened and lifted horizontally and positioned, the jig can be set by the operator in the cleaning process in the overcoating process, which requires the hood to be closed. People can be reduced. In addition, since the work of opening the hood by the operator is unnecessary even in the setting of the jig, there is an advantage that labor can be saved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a jig of the present invention.

FIG. 2 is a fragmentary cross-sectional view of the jig of the present invention.

FIG. 3 is an embodiment view of an upper hook.

FIG. 4 is a side view showing a state in which the jig of the present invention is set.

FIG. 5 is a side view showing a state in which the hood is opened by the jig of the present invention.

FIG. 6 illustrates the operation of the jig of the present invention.

FIG. 7 is an explanatory view of opening the hood horizontally.

FIG. 8 is a perspective view of a conventional jig.

FIG. 9 is a drawing of a painting work process using a conventional jig.

FIG. 10 is a drawing of a coating work process using a jig according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Jig 2 Cylindrical body 3 Handle 4 Handle 5 Horizontal bar 6 Lower hook 7 Support shaft 8 Upper hook 9 Guide cylinder 10 Guide shaft 11 Spring of shape memory alloy 12 Screw with flange 13 End cap 14 Hood lock part 15 Bumper mounting hole

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[Procedure amendment]

[Submission date] July 9, 1999 (1999.7.9)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Figure 2

[Correction method] Change

[Correction contents]

FIG. 2

Claims (2)

[Claims] 1. A jig for automatically opening a hood of a vehicle to a predetermined position, wherein a lower hook is fixedly provided below a cylindrical body, is inserted slidably in the axial direction into the cylindrical body, and is provided at an upper end thereof. A hood opening jig for a vehicle, comprising a built-in support shaft having an upper hook and a spring made of a shape memory alloy that extends the support shaft at a predetermined stroke depending on temperature. 2. A jig for automatically opening a hood of a vehicle to a predetermined position, wherein a lower hook is fixedly provided below a cylindrical body, is inserted slidably in the axial direction into the cylindrical body, and is provided at an upper end thereof. A support shaft having an upper hook, and a built-in shape memory alloy spring that extends the support shaft at a predetermined stroke depending on temperature, and a guide cylinder is fixed to a side portion of the cylinder with a parallel axis to the cylinder, A hood opening jig for a vehicle, wherein a guide shaft connected to the support shaft is slidably guided in the guide cylinder in the axial direction.