JPH0619854U - Hook for suspending coated objects in electrostatic coating - Google Patents

Abstract

(57) [Summary] (Revised) [Purpose] The top surface of the hook for hanging an unpainted object to which electrostatic coating is applied has an acute cross-section to ensure perfect electrical continuity with the unpainted object. [Structure] At least an upper surface of a hook for hanging an unpainted object is formed with a mountain portion having an acute-angled cross section and protruding upward. Due to this, in combination with the weight of the unpainted object, the vibration of the lift conveyor, or the flapping of the unpainted object during the degreasing shower, the electrical contact between the hook and the unpainted object is always complete, and repeated use is possible. Even if there is no electrical conduction failure due to paint adhesion on the non-painted object hanging surface of the hook, good electrostatic painting work can always be continued, improving work efficiency, maintainability, and cost reduction. be able to.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a hook used for suspending an object to be coated in electrostatic coating, which is caused by poor adhesion of static electricity due to adhesion of paint on the surface where the hook suspends the object to be coated over time, or The purpose is to prevent paint failure and improve maintainability and work efficiency.

[0002]

[Prior art]

 As shown in Fig. 3, the conventional unpainted object hanging hooks that have been used in a series of electrostatic painting operations are a plurality of hooks made by bending steel bars at regular intervals with respect to the hanging bar 1. 2 is attached to the hook 2, and an electrostatic coating is applied by hanging a window hole portion or the like of an unpainted object (not shown) through the hook 2.

[0003]

[Problems to be solved by the device]

 However, in the case of electrostatic coating, a negative high voltage is applied to the unpainted object via the grounded hook to make the unpainted object itself an anode, and the paint spraying device is used as a cathode to create an electrostatic field between the electrodes. In order to effectively attach the sprayed paint particles to the non-painted object, which is the opposite pole, by forming a negative charge, the paint particles also naturally adhere to the upper surface of the hook. As a result, the electrical continuity of the hook with the uncoated object deteriorates after about 3 to 4 times, which adversely affects the coating quality such as uneven coating and defective coating. Alternatively, it is necessary to heat the surface at high temperature to remove the adhered paint, and then sandblast it to polish the surface, which inevitably results in not only poor workability but also a significant increase in cost.

[0004]

[Means for Solving the Problems]

 In view of the above, the present invention is intended to solve the various problems in the above-mentioned conventional technology and to improve economic efficiency and work efficiency. Specifically, at least the upper surface of a hook for suspending an object to be coated is proposed. In addition, the present invention relates to a hook for suspending an object to be coated in electrostatic coating, which is characterized in that a mountain portion having an acute-angled cross section protruding upward is formed.

Further, according to the present invention, in the hook configured as described above, the mountain portion formed on the hook is continuous in the length direction of the hook for suspending an object to be coated in electrostatic coating. Also related to hooks.

Further, in the present invention, in the hook having the above-mentioned structure, the crests formed on the hook are formed in a single or plural number along the circumferential surface of the hook, and the crests are oriented in the length direction of the hook. The present invention also relates to a hook for suspending an object to be coated in electrostatic coating, which is characterized by being spirally wound.

[0007]

[Action]

 When an unpainted object is hung on the hook, the upwardly projecting cross section formed on the upper surface of the hook comes into contact with the sharp ridge, and together with the weight of the unpainted object, the hook and unpainted object Sufficient electrical continuity will be ensured, and good electrostatic coating will be continued with the start of painting work.

[0008]

【Example】

 The specific contents of the present invention will be described below with reference to the embodiment shown in FIG. 1. Reference numeral 11 denotes a hanging bar, and 12 denotes a hook integrally attached to the hanging bar 11 by welding. Further, the hook 12 is composed of a base portion 12a and a supporting portion 13 integrally attached to the tip portion thereof by welding, and a mountain portion 14 is formed on the supporting portion 13. The ridge portion 14 has a plurality of convex ridges 14a formed on the peripheral surface, the protrusions of which are sharply angled outward, and as a result, the cross-sectional shape of the support 13 is star-shaped. In this case, it is more effective if one of the five ridges 14a is preferably directed directly above the support 13.

Further, the mountain portion 14 having an acute cross section, which is formed on the support portion 13, does not necessarily have to be formed on the entire outer peripheral surface of the support portion 13 as described above. For example, FIG. As shown in FIG. 7, it is sufficient to form at least the upper surface of the support portion 13 with the ridge portion 14b having an acute cross-section protruding upward. As shown in FIG. 2 (B), a single or a plurality of ridges 14c are formed on the peripheral surface of the supporting portion 13, and these ridges 14c extend in the longitudinal direction of the supporting portion 13. It may be wound in a spiral shape. In each of the above-described embodiments, the base portion 12a and the support portion 13 welded to the front end of the base portion 12a are connected to each other. However, the present invention is not limited to this, and the base portion 12a and the support portion 13 are formed as a single component. With the above configuration, the various ridges 14 described above may be formed on the hook 12 itself.

Then, this is suspended on the hook 12 having the above-described structure, and a negative high voltage is applied to the unpainted object through the hook 12 to make the unpainted object itself an anode, and the paint spraying device is a cathode. As a result, an electrostatic field is formed between the two electrodes, the sprayed paint particles are negatively charged, and the paint particles are attached to the unpainted object, which is the opposite pole, and electrostatic painting is performed.

[0011]

[Effect of device]

 As described above, according to the present invention, since at least the upper surface of the hook for suspending the object to be coated is formed with the mountain portion having the acute-angled cross-section protruding upward, when the electrostatic coating work is performed, the Combined with the weight of the coated object, the vibration of the lift conveyor, and the shaking of the uncoated object during the degreasing shower, the electrical contact between the hook and the uncoated object is always perfect, and even after repeated use, the hook There is no static electricity conduction failure due to adhesion of paint on the hanging surface of the object, and good electrostatic painting work can always be continued, incomplete painting or unpaintable can be prevented, and maintainability and work efficiency are improved. Can be measured.

[Brief description of drawings]

FIG. 1 is a perspective view of an uncoated article hanging hook according to an embodiment of the present invention.

FIG. 2 is a partial perspective view of a support portion of a hook for hanging an uncoated article according to another embodiment of the present invention.

FIG. 3 is a perspective view of a conventional non-coated article hanging hook.

[Explanation of symbols]

 11 Hanging Bar 12 Hook 12a Base 13 Supporting Part 14 Mountain Part 14a Convex Line Part 14b Convex Line Part 14c Convex Line Part

Claims (3)

[Scope of utility model registration request] 1. A hook for suspending an object to be coated in electrostatic coating, characterized in that at least an upper surface of the hook for suspending the object to be coated is formed with a mountain portion having an acute cross-section protruding upward. 2. The hook portion formed on the hook is continuous in the length direction of the hook.
A hook for suspending an object to be coated in the electrostatic coating according to. 3. The ridges formed on the hook are formed in a single or plural number along the peripheral surface of the hook, and those ridges are spirally wound in the length direction of the hook. A hook for suspending an object to be coated in electrostatic coating according to claim 1.