JP3164417U - Non-woven suction plate - Google Patents

Abstract

The present invention provides a non-woven fabric suction plate that is used on a suction surface of a vacuum suction device or the like for fixing and transporting a work, and that is inexpensive, does not leave wrinkles or suction marks on the work, and does not generate suction dirt. A suction plate is formed of a heat-bonding nonwoven fabric A forming a suction surface and a heat-bonding nonwoven fabric B used on a vacuum suction side. The heat-bonding nonwoven fabrics A and B are a mixture of a low-melting fiber having a melting point of 100 to 200 ° C. and a fiber having a melting point of 70 ° C. or higher than the low-melting fiber. One layer or a plurality of layers A and B are laminated and laminated, and the outer periphery is fused by hot press. Further, the air flow rate of the non-fused portion was 50 to 150 cc / cm 2 / sec, and the air flow rate of the fused portion C 2 was 5 cc / cm 2 / sec or less. [Selection] Figure 2

Description

  This device is used for the suction surface of the vacuum suction device such as the robot's hand to transport or fix the work such as paper, film, wafer, glass plate, metal plate, etc. The present invention relates to a non-woven fabric suction plate that does not generate suction dirt or the like.

  In precision cutting and precision processing of glass plates for liquid crystals and semiconductor wafers, it is necessary to securely fix the workpiece so as not to be displaced, and a vacuum suction device is generally used as a fixing device at that time .

  By the way, in the vacuum suction device, the suction surface has an important role because the workpiece must be fixed stably and reliably as described above, and various proposals have been made regarding the suction surface structure. Adsorption member composed of sponge and neoprene (for example, refer to Patent Document 1) in order to eliminate wrinkles and adsorption traces and uniform adsorption, and ultrahigh molecular weight polyethylene to hold and fix a workpiece with high accuracy A porous sheet (for example, see Patent Document 2) or a porous adsorption plate made of a sintered metal of stainless steel or brass (for example, see Patent Document 3), and further reducing the pore size of the adsorption surface for more uniform adsorption Ceramic-based porous materials (see, for example, Patent Document 4) have been proposed.

JP 2002-127067 A JP-A-8-169971 JP-A-6-71854 JP 2004-59295 A

  However, in the suction surface member according to each of the above proposals, first, the sponge of the material used for the suction surface is inferior in wear resistance, and the porous sheet, sintered metal, or porous ceramic generally has an air flow rate. It was difficult to obtain a small amount of sufficient adsorbing force, and also had various disadvantages such as poor adhesion during compression due to high bending hardness and high cost.

  The present invention addresses the actual situation as described above, particularly focusing on the use of heat-adhesive non-woven fabric, and using the heat-adhesive non-woven fabric as a suction surface plate, without causing wrinkles or suction marks on the workpiece and strong suction The purpose is to make it possible to firmly hold, fix and move the workpiece with force.

  That is, the non-woven fabric adsorption plate of the present invention suitable for the above purpose is a mixture of a low melting point fiber having a melting point of 100 to 200 ° C. and a fiber having a melting point higher by 70 ° C. than that of the low melting point fiber. 1 layer or multiple layers of non-woven fabric of heat bonding type, and the outer periphery is fused by hot press, the air flow rate of the non-fused part is 50 to 150 cc / cm2 / sec, and the air flow of the fused part It has a configuration having an amount of 5 cc / cm 2 / sec or less.

  The heat-adhesive nonwoven fabric to be superposed here is not limited to a nonwoven fabric layer containing the same fiber, but may be a superposition of non-woven fabrics in which the blending ratio of both fibers is different. In particular, when there is no overlap in the non-woven fabric to be overlapped, it is preferable that when the mixing ratio of the low melting point fibers is different, the larger one is the suction surface side and the less is the vacuum suction side.

  In addition, the low melting point fiber used for the nonwoven fabric is an olefin fiber such as a modified polyester fiber, a modified nylon fiber, a polypropylene, or a polyethylene having a melting point of 100 to 200 ° C., a fiber diameter of 1 to 70 dtex, and a fiber length of 1 to 100 mm, or A fiber having a core-sheath structure such as polyester / nylon, or at least one fiber selected from two-component fibers such as polypropylene and half of the fiber cross section are polypropylene and the melting point is 70 ° C. or higher than the fiber. As the high fiber, at least one fiber selected from polyester fiber, nylon fiber, and rayon fiber having a fiber diameter of 1 to 70 dtex and a fiber length of 1 to 100 mm is used.

  In the present invention, as described above, the suction plate is composed of a relatively inexpensive non-woven fabric, and includes a low melting point fiber and is a smooth pressed and heated adhesive type non-woven fabric with a relatively large bulk density. It is non-woven fabric and has a strong suction force (suction force), so that it can grip and fix the workpiece firmly and move, and can be used on the suction surface of the vacuum suction device such as the robot hand. And has an excellent effect.

It is a top view which shows an example of the suction plate which concerns on this invention. It is XX sectional drawing of the said adsorption | suction plate. It is a use mode figure of the suction plate.

  Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a plan view showing an example of a suction plate according to the present invention. FIG. 2 is a sectional view taken along line XX of FIG. 1. In these figures, reference numeral 1 denotes a suction plate. The two nonwoven fabrics A and B are formed by laminating two layers of a nonwoven fabric A and a heat-bonded nonwoven fabric B used on the vacuum suction side, and are fused by a hot press or the like at the outer periphery thereof as a fused portion C. Are integrated.

  In the drawing, the suction plate 1 is formed by overlapping two layers, but it may be only one layer, or may be three or more layers. These are selected according to the thickness and basis weight required for the suction plate.

Here, the heat-bonding nonwoven fabric used for the adsorption plate 1 is a mixture of low melting point fibers and fibers having a melting point higher than that of the fibers by 70 ° C. or more at a required ratio, and is obtained by carding, needle punching or hydroentanglement. After entanglement, the non-woven fabric is created by bonding between fibers by hot pressing, and the basis weight and layer thickness are selected according to the mode of use, but usually a basis weight of 300 to 800 g / m ² and a thickness of about ² to 5 mm are suitable. It is.

  And as described above, the thermal bonding nonwoven fabric is not limited to a single layer, and is configured as a laminated layer of a plurality of layers. In the case of a plurality of layers, each layer is not necessarily limited to one having the same fiber composition, for example, It is also suitable according to the intended use to change the amount of the low-melting fiber blended and to superimpose layers having different blending ratios.

  For example, non-woven fabric A comprising 90 parts by weight or more of low melting point fibers and 10 parts by weight or less of fibers having a melting point of 70 ° C. or higher than low melting point fibers, and 90 parts by weight or less of low melting point fibers and 70 ° C. of melting point of low melting point fibers. When two layers of non-woven fabric B in which 10 parts by weight or more of high fibers are mixed are overlapped, the above-mentioned heat-bonding non-woven fabric A side is used as the work suction surface side of a vacuum suction device or the like, while the heat-bonding non-woven fabric B is used as the suction side. As a result, there is an effect over conveyance, fixation, and the like due to workpiece adsorption.

  The low melting point fiber is not particularly limited as long as it is a fiber that is melted and solidified by an ordinary heat calender, hot press, etc. For example, a modified polyester fiber, a modified nylon fiber, a polyolefin fiber such as polyethylene or polypropylene, Alternatively, a core-sheath structure such as polyester / nylon or a composite fiber such as a bicomponent fiber in which half of the fiber cross section is polypropylene and the other half is polyethylene is usually used.

These low-melting fibers generally have a melting point of 100 to 200 ° C., a fiber diameter of 1 to 70 dtex, and a fiber length of 1 to 100 mm. Of course, it is not limited to the above as long as entanglement processing such as mixed cotton, carding, needle punching or hydroentanglement is possible. On the other hand, a fiber having a melting point higher by 70 ° C. than the low melting point fiber is a regular type polyester fiber. Nylon fiber, rayon fiber, cotton, etc. are included, and these fibers preferably have a fiber diameter of 1 to 70 dtex and a fiber length of 1 to 100 mm due to blending, carding, entanglement processing, and the like.

The thermal bonding nonwoven fabric has a width of 7 to 20 mm so that it can be attached to the suction plate body at the same time while preventing air from entering from the surroundings when one or more layers are stacked and sucked. In a hot press, it is fused and solidified to integrate the heat-bonded nonwoven fabric. At this time, it is desirable that the portion other than the fused portion C is finished as bulky as possible in order not to cause a decrease in the air flow rate. Further, the outer peripheral fused portion C facilitates mounting and prevents air from leaking from other than the non-fused portion to reduce the adsorption power. Therefore, it is preferable that the air flow rate of the non-fused portion is 50 to 150 cc / cm ² / sec, and the air flow rate of the fused portion is 5 cc / cm ² / sec or less.

  In addition, in the adsorption plate made of the above-mentioned heat-bonded nonwoven fabric, the nonwoven fabric is processed in a conventional manner before thermoforming depending on the purpose and place of use, that is, antistatic agent, flame retardant, etc. by impregnation processing, coating processing or spray processing. It is also suitable to give.

  FIG. 3 shows a case where the suction plate 1 is attached to and used in a vacuum port 2 that forms a suction portion of a vacuum suction device or the like. The suction plate 1 has a holed plate 4 in the vacuum port 2 that forms a workpiece fixing portion. The workpiece can be fixed and held at any time by attaching through the suction and sucking from the suction portion 3.

  Although the suction plate 1 is rectangular in FIG. 1, the suction plate 1 is not limited to a rectangular shape, and may be formed in a suitable shape according to the structure of the suction portion, such as a square, a circle, and an ellipse.

1: Adsorption plate A: Adsorption surface side non-woven fabric B: Vacuum suction side non-woven fabric C: Fusion part 2: Vacuum port 3: Suction part 4: Perforated plate

Claims (3)

One or more layers of heat-bonded non-woven fabrics made by blending low melting point fibers with a melting point of 100-200 ° C. and fibers having a melting point 70 ° C. higher than that of the low melting point fibers and then thermally bonding them after carding and entanglement processing In addition, the outer periphery is formed by fusing with a hot press, and the non-fused portion has an air flow rate of 50 to 150 cc / cm ² / sec and the fused portion has an air flow rate of 5 cc / cm ² / sec or less. A non-woven fabric adsorption plate characterized by   The non-woven fabric adsorption plate according to claim 1, wherein the heat-bonded non-woven fabric to be superposed is a non-woven fabric having different blending ratios of low melting point fibers.   Low melting point fiber used for heat-bonding nonwoven fabric has a melting point of 100 to 200 ° C., fiber diameter of 1 to 70 dtex, fiber length of 1 to 100 mm, modified polyester fiber, modified nylon fiber, olefin fiber such as polypropylene and polyethylene, or polyester / A fiber having a core-sheath structure such as nylon, or a fiber selected from bicomponent fibers such as polypropylene and half of the fiber cross section being polypropylene, and a fiber whose melting point is 70 ° C. or higher than the fiber is 1 to 1. The non-woven fabric adsorption plate according to claim 1, which is a fiber selected from 70 dtex, polyester fiber having a fiber length of 1 to 100 mm, nylon fiber, and rayon fiber.

Images