JP7484841B2 - Handling fixture - Google Patents

Description

The present invention relates to a handling jig that grips and moves a plate-shaped member.

Plate-shaped materials such as steel, non-ferrous metals, and resins are used in a wide range of fields as raw materials for various industrial products, and generally, plate-shaped materials or products are transported on production lines by machines. On the other hand, plate-shaped materials may be handled by workers when handling small quantities of materials of various shapes, or when making subtle adjustments to materials before they reach the production line. For example, workers may perform heat treatments such as quenching, tempering, and annealing on plate-shaped materials made of metal materials. Temperature control is important in each heat treatment process, so in order to move the plate-shaped materials that have reached a specified temperature through heating and cooling operations to further processing steps, it is necessary to move the plate-shaped materials quickly and accurately.

Various handling jigs have been proposed for moving plate-shaped members (see, for example, Patent Documents 1 to 3). Patent Documents 1 and 2 disclose handling jigs that hold both sides of a plate-shaped member such as a photomask substrate when transporting the member. Patent Document 3 discloses technology for a handling jig that holds the top surface of a plate-shaped member by suction.

JP 2000-174107 A JP 2006-108156 A JP 2015-16992 A

When holding a plate-shaped member by clamping it from both sides as in Patent Documents 1 and 2, the plate-shaped member is supported by applying force to the sides, while Patent Document 3 moves the plate-shaped member by adsorbing it in one place. This requires that the plate-shaped member be lifted and moved while maintaining balance. However, when the plate-shaped member is large and heavy, there is a risk that it will lose balance and fall during movement, and there is a limit to how quickly it can be moved, making it difficult to operate. In particular, when the plate-shaped member is made of a heat-treated metal material, it is desirable to be able to move it quickly without it falling.

The present invention aims to solve the above problems by providing a handling jig that improves operability and can transport plate-shaped members reliably without dropping them.

[1] A handling jig for gripping a plate-like member,
A jig body extending in one direction;
a gripping portion that is bent and attached to one end side of the jig body relative to the jig body and that opens and closes to grip the plate-like member from the side surface side by sandwiching the upper and lower surfaces;
an operating part provided on the other end side of the jig body for operating the gripping part to open and close;
A handling jig having the following features.
[2] The handling jig according to [1], further comprising an elastic member that biases the gripping portions in a direction in which the gripping portions are closed.
[3] The handling jig according to [1] or [2], wherein the gripping portion grips the plate-like member with a contact area of ¹ mm2 or less.
[4] The handling jig according to any one of [1] to [3], wherein the gripping portion grips the plate-like member at three or more points.
[5] The gripping portion is
A first arm formed in a flat plate shape and configured to grip one surface side of the plate-shaped member;
a second arm having two or more rod-shaped members disposed at intervals equal to or greater than the width of the first arm and configured to grip the other surface of the plate-shaped member;
The handling jig according to any one of [1] to [5],
[6] The gripping portion includes a first arm that grips one surface side of the plate-like member and a second arm that grips the other surface side of the plate-like member,
The handling jig according to any one of [1] to [4], wherein the first arm and the second arm each have two or more rod-shaped members that contact the plate-shaped member.
[7] The handling jig according to [6], wherein the rod-shaped member has a cylindrical shape.
[8] The gripping portion has a first arm that grips one surface side of the plate-like member and a second arm that grips the other surface side,
The handling jig according to any one of [1] to [4], wherein the first arm and the second arm are each formed into a flat plate shape.
[9] The handling jig according to [8], wherein the first arm or the second arm is provided with a protrusion on a contact surface with the plate-like member.
[10] The handling jig according to any one of [1] to [9], wherein the jig body has a cylinder and a piston that moves axially within the cylinder.
[11] The handling jig according to any one of [1] to [10], wherein the jig body and the gripping portion are made of stainless steel.
[12] The handling jig according to any one of [1] to [11], wherein the plate-like member is a heat-treated metal material.
[13] The handling jig according to [12], wherein the plate-like member is made of a steel material.

According to the present invention, the jig has a gripping section that is bent and attached to the jig body and opens and closes to grip the top and bottom sides of the plate-shaped member from the side. This ensures that the plate-shaped member is securely held and prevented from falling during movement, and the plate-shaped member can be transported without falling while improving operability, thereby improving operability during movement.

1 is a schematic cross-sectional view showing a first embodiment of a handling jig of the present invention. FIG. 2 is a schematic diagram showing an example of a gripping portion of FIG. 1 . FIG. 4 is a schematic diagram showing another example of the handling jig of the present invention. FIG. 4 is a schematic diagram showing another example of the handling jig of the present invention. 2 is a schematic diagram showing a state in which the handling jig in FIG. 1 grips a plate-shaped member S. FIG. FIG. 13 is a schematic diagram showing modified example 1-4 of the gripping portion in the handling jig of the present invention. FIG. 5 is a schematic diagram showing modified example 5-7 of the gripping portion in the handling jig of the present invention. FIG. 8 is a schematic diagram showing a modified example 8-10 of the operating portion in the handling jig of the present invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic cross-sectional view of a handling jig according to a first embodiment of the present invention. The handling jig 1 is used to grip and move a plate-shaped member S, which is made of a metal material that has been subjected to heat treatment such as quenching, tempering, or annealing. The metal material may be a steel material, or may be a non-ferrous metal such as an aluminum alloy, ceramics, etc.

The handling jig 1 comprises a jig body 2, a gripping section 3, and an operating section 4. The jig body 2 comprises, for example, a cylindrical cylinder 2a extending in one direction, and a piston 2b housed in the cylinder 2a and movable in the axial direction of the cylinder 2a. The size of the jig body 2 is not limited, but is set in consideration of the distance to be secured between the worker and the plate-shaped member S, and the total weight of the handling jig 1 and the plate-shaped member S, taking into account the worker's hands, the size and weight of the plate-shaped member, the installation environment of the plate-shaped member, etc. For example, when performing high-temperature heat treatment work on a metal material that is not very heavy, it is desirable to maintain a distance between the worker's hands and the heat treatment environment, so it is desirable for the jig body 2 to be sufficiently long.

Furthermore, while the cylinder 2a has been exemplified as having a cylindrical shape, this is not limiting. It is preferable that the piston 2b has a similar shape to the piston 2b in order to facilitate smooth movement along the axis of the cylinder 2a. From the viewpoint of reducing friction between the cylinder 2a and the piston 2b and further improving workability, it is more preferable that the cross section of the cylinder 2a is circular. The materials of the cylinder 2a and the piston 2b are not limited and can be selected arbitrarily depending on the environment in which they are used and the material costs. Also, grooves or protrusions may be provided inside the cylinder 2a in order to prevent the piston 2b from rotating.

The gripping unit 3 is adapted to grip the top and bottom sides of the plate-like member S from the side by opening and closing, and is attached to one end of the jig body 2 in a bent manner relative to the jig body 2. FIG. 2 is a perspective view showing an example of the gripping unit in FIG. 1. The gripping unit 3 in FIG. 2 has a first arm 3a that grips the top surface, which is one side of the plate-like member S, and a second arm 3b that grips the bottom surface, which is the other side of the plate-like member S. The first arm 3a is fixed to the cylinder 2a, and the second arm is fixed to the piston 2b. The first arm 3a and the second arm 3b are opened and closed by the movement of the piston 2b relative to the cylinder 2a.

The first arm 3a is made of, for example, a flat plate bent in a direction perpendicular to the axial direction of the jig body 2. The second arm 3b has a base 3m fixed to the piston 2b and two rod-shaped members 3n extending from the base 3m in the same direction as the first arm 3a. In this way, the gripping part 3 can stably hold the plate-shaped member S by supporting the plate-shaped member at three or more points. The two rod-shaped members 3n are installed at an interval equal to or greater than the width of the first arm 3a. This allows the plate-shaped member S to be held more stably. It is desirable that the lengths of the first arm 3a and the second arm 3b be set according to the size of the plate-shaped member S. Note that, although FIG. 2 illustrates an example in which the gripping part 3 holds the plate-shaped member S at three points, it may also be three or more points. Although the second arm 3b illustrates an example in which it has two rod-shaped members 3n, it may also have two or more rod-shaped members 3n.

Furthermore, when the plate-shaped member S is a heat-treated metal material, in order to stabilize the material after heat treatment, it is preferable that the rod-shaped member 3n is cylindrical in shape to reduce the contact area and reduce the temperature change of the plate-shaped member S. Specifically, the contact area between the gripping portion 3 and the plate-shaped member S is preferably ¹⁰ mm2 or less in total, more preferably ⁵ mm2 or less in total, and even more preferably ¹ mm2 or less in total.

The operating unit 4 in FIG. 1 is provided on the other end side of the jig body 2 and operates the opening and closing of the gripping unit 3. The operating unit 4 includes a first handle 4a fixed to the cylinder 2a and a handle 4b fixed to the piston 2b. When an operator operates the first handle 4a and the second handle 4b, the piston 2b moves relative to the cylinder 2a, and the gripping unit 3 is opened and closed. The shapes of the first handle 4a and the second handle 4b are not particularly limited, but by making them square or round bars, it is possible to achieve both stability in holding the handling jig 1 itself by hand and operability when moving it.

The gripping part 3 and the operating part 4 described above only need to be attached to one end and the other end of the jig body 2, and do not necessarily have to be at the end of the jig body 2. There may be a small gap between the end of the cylinder 2a and the gripping part 3 or the operating part 4, and this can be set appropriately depending on the plate-like member S and the work content.

The handling jig 1 in FIG. 1 further includes an elastic member 5 that biases the gripping portion 3 in a direction to close it. In FIG. 1, the elastic member 5 is, for example, a spring, and is disposed between the first handle 4a and the second handle 4b. The elastic member 5 biases the first handle 4a and the second handle 4b in a direction to pull each other. Therefore, when no operation is performed on the operating portion 4, the gripping portion 3 is maintained in a closed state by the elastic member 5. In particular, the elastic member 5 applies a biasing force to the gripping portion 3 that holds the plate-shaped member S without it falling out of the gripping portion 3. This eliminates the need for the operator to continue applying force to the operating portion 4 while the plate-shaped member S is moving while being sandwiched between the gripping portions 3, improving operability and reducing the workload while preventing the plate-shaped member S from falling out.

The elastic member 5 is installed on the operation unit 4 side, but is not limited to this. As shown in FIG. 3, the elastic member 5 may be provided on the gripping unit 3 side to apply a biasing force to the cylinder 2a and piston 2b. Furthermore, the elastic member 5 may be built into the jig body 2. Also, as shown in FIG. 4, the elastic member 5 does not need to be provided. In this case, the opening and closing operation of the gripping unit 3 and the holding of the plate-like member S are performed by the force applied from the operation unit 4.

Figure 5 is a schematic diagram showing how the handling jig of Figure 1 grips a plate-shaped member S, and an example of the operation of the handling jig will be described with reference to Figure 5. As shown in Figure 5, for example, a plate-shaped member S placed horizontally is heat-treated in an electric heat treatment furnace 10, and the heat-treated plate-shaped member S is removed from the top opening of the electric heat treatment furnace 10 using the handling jig 1. First, the handling jig 1 is inserted into the electric heat treatment furnace 10 from the top opening of the electric heat treatment furnace 10, and the gripping portion 3 is positioned to the side of the plate-shaped member S. At this time, the gripping portion 3 is in a closed state due to the biasing force of the elastic member 5.

Then, the operator operates to increase the distance between the first handle 4a and the second handle 4b, which opens the first arm 3a and the second arm 3b of the gripping unit 3. The first arm 3a and the second arm 3b grip the top and bottom surfaces of the plate-shaped member S from the side of the plate-shaped member S. The operator then releases the force applied to the operating unit 4, which causes the gripping unit 3 to close due to the biasing force of the elastic member 5, and the plate-shaped member S is held in the gripping unit 3. The operator then lifts the entire handling jig 1, which moves the plate-shaped member S together with the handling jig 1.

According to the above embodiment, the gripping portion 3 is bent and attached to the jig body 2, and opens and closes to grip the top and bottom sides of the plate-shaped member S from the side. This allows the plate-shaped member S to be supported on one side and moved reliably without dropping, improving operability during movement.

In the case of a conventional handling jig intended for handling a photomask substrate, an optical sheet, etc., the specific gravity of the photomask substrate, etc. is small at about 2 g/ ^cm3 , and the size is not large, so the weight is extremely small. On the other hand, in the case of a plate-shaped member S intended for heat treatment of a metal material, such as a steel door impact beam member that is hot press-formed, the size is about several hundred mm, and the specific gravity is about 8 g/ ^cm3 . For this reason, the weight of the plate-shaped member S is extremely large and insufficient for carrying out heat treatment of a metal material.

Furthermore, conventionally, the operator would grip the front end of the handling jig, which would hold the plate-shaped member on the plate-shaped member side of the handling jig. This meant that the operator had to lift and move the plate-shaped member in an overhanging state, which required a large force to support not only the weight of the plate-shaped member and handling jig, but also the moment caused by the overhang.

For example, in the manufacturing process of ultra-high strength steel components for automobiles, hot pressing involves simultaneous press forming and quenching, so the workpiece, which has been heated to a temperature range in which the steel material is in austenite single phase, must be transferred to a die and cooled to the martensite transformation start temperature faster than the steel material can transform into ferrite, pearlite, or bainite. In addition to the workpiece itself being hot, the furnace body is also hot, so to carry this out manually safely and efficiently requires highly skilled workers.

In heat treatment processes such as quenching, tempering, and annealing of metal materials, jigs such as pliers, pliers, and fire tongs are used to hold the metal material. However, when using these jigs, it is necessary to bend the corners of the plate-shaped member S to form the area to be clamped by the jig in advance, which is time-consuming and makes the process unstable because the area to be clamped is small.

On the other hand, as shown in FIG. 1, the handling jig 1 is bent and attached to the jig body 2, and has a gripping portion 3 that opens and closes to grip the top and bottom sides of the plate-shaped member S from the side, so that the plate-shaped member S can be supported on one side, allowing it to be transported reliably without dropping. Furthermore, it becomes easier to balance the plate-shaped member S while carrying the handling jig 1 gripping it, improving operability when moving the plate-shaped member S.

6 and 7 are schematic diagrams showing modified examples 1 to 7 of the gripping portion of the handling jig of the present invention. In FIG. 6 and FIG. 7, the same reference numerals are used for parts having the same configuration as those in FIG. 1 to FIG. 5, and the description thereof will be omitted. In modified examples 1 to 4 of FIG. 6, the first arm 3a and the second arm 3b are both made of flat plates, the first arm 3a and the second arm 3b in modified example 1 are formed in a circular shape, and modified examples 2 to 4 are formed in an elliptical shape. Furthermore, in modified examples 3 and 4, protrusions 3x are formed on the surfaces of the first arm 3a and the second arm 3b that face the plate-like member S. It is effective for the protrusions 3x to have the contact point with the plate-like member S as the generatrix of a cylinder or the apex of a cone. The contact area with the plate-like member can be reduced. In this case as well, in order to stabilize the grip of the plate-like member, it is preferable to provide three or more contact points between the plate-like member and the jig.

Figure 8 is a schematic diagram showing modified examples 1 to 7 of the gripping portion of the handling jig of the present invention. In Figures 6 and 7, parts having the same configuration as those in Figures 1 to 5 are given the same reference numerals and their description is omitted. In modified examples 8 to 10 of Figure 8, a square bar or a round bar is used. In this case, it is possible to achieve both stability in holding the handling jig 1 itself by hand and operability when moving it.

Reference Signs List 1 Handling jig 2 Jig body 2a Cylinder 2b Piston 3 Grip portion 3a First arm 3b Second arm 3m Base portion 3n Rod-shaped member 3x Projection portion 4 Operation portion 4a First handle 4b Second handle 5 Elastic member 10 Electric heat treatment furnace S Plate-shaped member

Claims (13)

A handling jig for gripping a plate-like member,
A jig body extending in one direction;
a gripping portion that is bent and attached to one end of the jig body relative to the jig body and that opens and closes to grip the plate-like member from the side surface by sandwiching the upper and lower surfaces;
an operating part provided on the other end side of the jig body for operating the gripping part to open and close;
A handling jig having the following features. The handling jig according to claim 1, further comprising an elastic member that biases the gripping portion in a direction to close. The handling jig according to claim 1 or 2, wherein the gripping portion grips the plate-like member with a contact area of ¹ mm2 or less. The handling jig according to any one of claims 1 to 3, wherein the gripping portion grips the plate-like member at three or more points. The gripping portion is
A first arm formed in a flat plate shape and configured to grip one surface side of the plate-shaped member;
a second arm having two or more rod-shaped members disposed at intervals equal to or greater than the width of the first arm and configured to grip the other surface of the plate-shaped member;
The handling jig according to any one of claims 1 to 4, comprising: the gripping portion includes a first arm that grips one surface of the plate-like member and a second arm that grips the other surface of the plate-like member,
5. The handling jig according to claim 1, wherein the first arm and the second arm each have two or more rod-shaped members that contact the plate-shaped member. The handling jig according to claim 6, wherein the rod-shaped member has a cylindrical shape. the gripping portion has a first arm that grips one surface side of the plate-like member and a second arm that grips the other surface side of the plate-like member,
The handling jig according to any one of claims 1 to 4, wherein the first arm and the second arm are each formed in a flat plate shape. The handling jig according to claim 8, wherein the first arm or the second arm has a protrusion on the contact surface with the plate-like member. The handling jig according to any one of claims 1 to 9, wherein the jig body has a cylinder and a piston that moves axially within the cylinder. The handling jig according to any one of claims 1 to 10, wherein the jig body and the gripping portion are made of stainless steel. The handling jig according to any one of claims 1 to 11, wherein the plate-like member is a heat-treated metal material. The handling jig according to claim 12, wherein the plate-like member is made of a steel material.

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