JPH026056Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a jig for lifting plate glass, which is suitable for use when moving plate glass such as window glasses and mirrors within a workplace, or when loading the plate onto the loading platform of a transport vehicle.

Although plate glass has a relatively high strength in the plane direction, its strength in the direction perpendicular to the plane is extremely low. For this reason, special care must be taken when handling large plate glass to prevent scratches and cracks. It takes.

To explain the conventional handling of this type of plate glass, first of all, in commercial practice, the unit used for transporting and shipping plate glass within a factory is called a "pallet" rather than a single sheet of glass. By using units, multiple pieces of glass corresponding to the thickness of the glass plate are handled as one unit. When moving sheet glass, it has been practiced for many years to store this one unit in a box-shaped body covered with a wooden frame, for example, and to lift it up using an overhead crane or the like. However, in recent years, in order to promote rationalization in the distribution transaction process, a method of handling bare plate glass as it is has been practiced.

A general jig used to move this bare plate glass is shown in FIG. 8, and its handling method will be explained.
A hook 42 from an overhead crane is engaged with the hook 42, and on the other hand, hooks 43, 43 provided at both ends of the beam 40
Strong sling made of materials such as nylon 4
The slings 4, 44 are latched and suspended, and the slings 44, 44 are inserted from both sides of the glass plate 45, which has been propped up against a stand or the like in advance, and then lifted and moved to a desired location.

However, in the conventional method using the above-mentioned jig, since the glass plate is held in a flexible sling, unnecessary stress is applied in the direction perpendicular to the surface of the glass plate in proportion to the weight of the glass plate, making the glass susceptible to breakage. The edges of the glass have the disadvantage of being easily damaged due to the concentrated stress applied to them. Usually, slings are formed to have a certain degree of thickness and rigidity so that they are oval in the free state, but these drawbacks have not yet been overcome.

Further, the sling must be inserted vertically from both sides of the glass plate at a predetermined position, which requires a lot of man-hours, leading to deterioration of work efficiency and work cost.

Furthermore, in order to smoothly insert the sling into the glass plate, it is necessary to provide a margin for the circumference, which requires an unnecessary amount of lift when lifting the sling, and the beam itself has to be large and heavy, among other drawbacks.

The present invention eliminates the above-mentioned drawbacks, and there is no risk of breaking or damaging the glass plate.Furthermore, the glass plate can be lifted semi-automatically by a single worker, significantly improving work efficiency. The purpose is to provide a lifting jig for.

The present invention is a lifting jig used when moving plate glass in order to achieve the above purpose, and its main structure is, for example, a main body with a frame structure, and a plate glass protruding from the lower part of the main body at a substantially right angle. It has a pair of left and right support pieces that support the lower side,
On the other hand, a pair of left and right locking tools which are supported in the upper part of the main body so as to be slidable up and down, form a downwardly bent edge at the front part and lock the upper part of the plate glass, and a hook holder provided at the center of the upper part of the main body. It is characterized by having the following.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

Fig. 1 is a perspective view of a jig for lifting plate glass according to the present invention, Fig. 2 is an enlarged side view of section A in the dashed line circle in Fig. 1, and Fig. 3 is an enlarged side view of section B in the dotted line circle in Fig. 1. 4 to 7 are explanatory diagrams for explaining the use of the lifting jig shown in FIG. 1.

First, the configuration of the jig 1 for lifting plate glass will be explained. In addition, the reference numeral 2 indicated by a chain double-dashed line in FIG. 1 indicates one unit of plate glass as described above.

The lifting jig 1 has a main body 3 with a frame structure.
The main body 3 further includes a pair of left and right frames, a left frame 4 and a right frame 5, an upper frame 6 that connects their upper ends, and an intermediate frame 7 that connects their middle parts. The right frames 4 and 5 are attached to the upper frame 6 with bolts 8..., and the intermediate frame 7 is attached using brackets 9, 9 integrally provided on the rear surfaces of the left and right frames. Bolts 10, 1 are inserted from the outside into the screw holes formed at both ends of the
0 is screwed and fastened, and each of these frames can be assembled or disassembled using the above-mentioned bolts. Furthermore, although the upper frame 6 and the intermediate frame 7 are parallel to each other, if we pay attention to their respective lengths, the upper frame 6 is formed relatively shorter than the intermediate frame 7, and as shown in FIG. The glass plate 2 is shaped into a trapezoidal shape with gradually wider widths in consideration of stability when supporting the glass plate 2. In particular, the stability improves as the extension lines of the left and right frames are brought closer to the same direction as the top of a hanging hook holder provided at the center of the upper part of the main body, which will be described later.

In addition, since the front surfaces of the left and right frames 4 and 5 are in contact with the glass surfaces, buffer sheets 11 and 11 made of a necessary buffer material such as rubber, soft synthetic resin, fiber bundle, etc. are pasted to protect the plate glass. It is planned.

On the other hand, the lower part of the main body 3, that is, the lower parts of the left and right frames 4 and 5, integrally form a pair of left and right support pieces 4a and 5a that project forward at a substantially right angle. FIG. 2 shows the side surface of such a support piece 5a, and a sheet-like elastic body 12 made of an elastic material such as urethane rubber is attached to the upper surface of this support piece 5a, and this tip 12a is attached to the top surface of the support piece 5a. It is chamfered or the like so that it slightly protrudes from the tip of the support piece 5a. In addition, since the elastic body 12 supports the lower side of the glass plate 2, the shape of the support piece 5a etc. is taken into consideration so that the lower side of the glass plate and the upper surface of the elastic body 12 are parallel to each other. Also,
The support piece 4a side is also constructed in exactly the same manner as the support piece 5a side described above.

On the other hand, on the upper part of the main body 3, that is, on the upper surface of the upper frame 6, a rod-like member is bent at the center to form an inverted V-shape, and both ends of the rod-like member are fixed to the center to provide a hook receiver 13.
will be established. A hook 14 from, for example, an overhead crane is hooked onto the top portion 13a of the hook receiver 13, and is used for hanging the book lifting jig 1.

Further, a pair of left and right guide columns 15 and 16 are vertically provided on the upper surface of the upper frame 6 on both sides of the hook receiver 13, and the locking tools 17 and 18 are supported by the guide columns so as to be vertically slidable. FIG. 3 shows a side view of such a locking device 18, and its concrete configuration includes a horizontal arm 18a in the middle, the length of which is determined according to the thickness of one unit of the plate glass 2 to be locked. The glass plate is designed with a certain degree of protection in mind, and is also formed with a predetermined support member to protect the top edge of the glass plate. Further, a cylindrical support frame 18b that is slidably fitted into the guide column 16 is integrally provided at the rear part of the horizontal arm 18a, and the front part of the other horizontal arm 18a is bent vertically downward and engaged. A retaining edge 18c is formed. In addition, an elastic sheet 19 made of the above-mentioned predetermined elastic material is attached to the inner surfaces of the horizontal arm 18a and the locking edge 18c to protect the glass plate, and a fiber bundle or the like is attached to the front surface of the support frame 18b. The upper part of the flexible guide member 20 formed into a sheet shape is attached, etc., and the lower part is hung down at a predetermined length (see FIG. 1), so that the upper part of the plate glass 2 is attached to the locking part 18. Designed to ensure smooth engagement. In addition,
The locking tool 17 side is also configured in exactly the same manner as the locking tool 18 side described above. Further, at the upper ends of the guide columns 15 and 16, there are stoppers 15a for preventing the above-mentioned locking tools from coming off.
and 16a are provided.

In the above configuration, if the forming material is not specified, a specified rigid material is used, specifically low carbon steel channel steel, polished steel bar, structural low carbon steel pipe, etc., and this jig 1 If the overall height is 2100mm and the overall width is 1900mm, the weight will be 26kg and the plate glass will be 1829~
It was possible to lift one unit measuring 1905 mm x 2438 to 2540 mm with a considerable safety factor.

Note that ropes 21, 21 of a predetermined length are fixed to the lower ends of the left and right frames 4 and 5, so as to cope with lateral vibration when the frame is lifted.

Next, a method of using the book lifting jig 1 will be explained with reference to FIGS. 4 and 5. In each of these drawings, the same parts as in FIG. 1 are given the same reference numerals to clarify the structure.

First, FIG. 4 shows a state in which the main lifting jig 1 is lifted without any load, that is, without supporting a glass plate. In this state, most of the weight is due to the main body 3, so the center of gravity is also approximately at the center of the main body 3, and the lifting jig 1 is also in a substantially vertical state.

Next, by operating an overhead crane or the like, the hook 14 is gradually lowered, and the supporting piece 5a of the lifting jig 1 is lifted onto the glass surface in the front row of the plate glass 2 that is leaning against the stand 22 at a predetermined angle. , 4a is lowered while abutting the tip 12a of the sheet-like elastic body 12, as shown in FIG.

When the device is further lowered, the locking tools 18 and 17, which had been positioned below due to their own weight, are positioned relatively upward due to the locking action on the plate glass, and finally the supports 5a and 4a are moved upward. It automatically enters the lower side of plate glass 2. This state is shown in FIG.

Next, if you operate the hook 14 to raise it,
As shown in FIG. 7, the lower side of the plate glass 2 has a support piece 5a,
4a, and the upper part of the glass plate 2, especially the upper surface of the last row of glass plates, is supported by the locking tools 18, 17.
It is suspended by the locking edges 18c, 17c of the. In this way, the jig for lifting plate glass 1
It is possible to simply move the crane up and down, and the operator only has to operate the crane up and down, making the loading process extremely easy.

In addition, when the plate glass is placed on the lifting jig, if the center of gravity of the plate glass is shifted from the center of the support pieces 4a, 5a, that is, if the plate glass is shifted to either the left or right and it is likely to fall if it is lifted as it is. In this case, the position of the plate glass with respect to the support pieces 4a, 5a must be changed to correct the left and right position. However, according to the structure of the present invention, the crane is lowered, the plate glass is placed on the stand 22, and the plate glass is placed on the stand 22 and then supported. Correction can be easily performed by releasing the locking of the pieces 4a and 5a from the plate glass, and moving the main body 3 to either the left or right while holding the main body at an appropriate position in that state.

In addition, when placing a glass plate on the lifting jig, the bottom piece of the glass plate is locked with the support pieces 4a and 5a, and the upper front side is locked with the locking edge 18c, so that the glass plate can be placed in one piece. Even if there is one or a large number of sheets, it can be placed with the same ease.

At this time, it should be noted that as a result of the plate glass 2 being supported on the front side of the lifting jig 1, the center of gravity shifts toward the plate glass 2 side, and therefore the lifting jig 1 is also lifted with its upper part tilting forward. The angle of inclination θ ₁ with respect to the vertical line and the angle of inclination θ ₂ of the stand 22 are approximately the same.

Therefore, in the present lifting jig 1, the arrangement angle of the hook receiver 13 and the height of the top portion 13a of the hook receiver are determined in advance so that the respective inclination angles are approximately the same. Safe and reliable work can be done without damaging the edges of the glass plate during hanging.

In addition, when the plate glass supported by the main lifting jig 1 is to be propped up on a predetermined stand, the above-described operation may be performed in the exact opposite manner.

Furthermore, the lifting jig 1 according to the present invention is not limited to the above embodiments, and the shape of each part or the number of support pieces and locking devices can be arbitrarily selected, and other aspects of the present invention may be used. Changes that do not depart from the gist are permitted.

As is clear from the above explanation, if the glass plate lifting jig according to the present invention is used, the lower side of the glass plate can be supported, and the upper part of the glass plate can be simply locked and lifted, which adds unnecessary stress to the glass plate. There is no risk of cracking or damage to the edges. Furthermore, the lifting work can be carried out almost automatically, ensuring safe and reliable work even by a single worker, and greatly improving work efficiency and work costs. Since the guide members 20, 20 are provided on the front surface of the support frame 18b, when the crane is lowered and the locking edge 18c is locked to the upper front surface of the glass plate, the plate glass can be guided by the guide members 20, 20, which makes it easier to Easily and reliably locking edge 1
8c can be locked to the front surface of the upper part of the glass plate. Furthermore, it has a relatively simple structure and is lightweight, and has a high practical value with various advantages such as no need for unnecessary lift compared to conventional jigs of this type. We can provide jigs for lifting plate glass.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a jig for lifting plate glass according to the present invention, Fig. 2 is an enlarged side view of section A in the chain line circle in Fig. 11, and Fig. 3 is an enlarged side view of section B in the chain line circle in Fig. 1. 4 to 7 are explanatory views of the use of the lifting jig shown in FIG. 1, and FIG. 8 is an explanatory view of a conventional example. In the drawing, 3 is the main body, 4a and 5a are support pieces, 1
3 is a hook holder, and 17 and 18 are locking tools.

Claims (1)

[Claims for Utility Model Registration] (1) A main body is composed of a pair of vertical frames spaced apart in the horizontal direction and a horizontal frame connecting the upper parts of the vertical frames, which protrudes forward from the lower part of the main body and extends from the upper surface. A support piece is provided with an elastic body for placing the lower edge of the plate glass, and a locking claw part is provided at the tip of the support piece to protrude upward and lock onto the lower front surface of the plate glass, and a locking claw part is provided at the tip of the support piece to protrude forward from the upper part of the main body. , and an arm part that is vertically slidable within a predetermined range is provided, and a locking edge is provided at the front end of the arm part to be bent downward and locked to the front surface of the upper part of the plate glass, and the locking edge can be engaged with a crane that moves up and down to A hook for slidably suspending the main body on the crane is attached to the main body, and the hook is attached to the main body at a position such that the plate glass is not placed on the main body, the inclination of the main body is zero, and the plate glass is placed on the main body. In this state, the main body is tilted in the same direction as the stand for the plate glass, and when lifting the plate glass, the main body is lowered from above the glass plate that is propped against the stand, and the locking edge is placed on the plate glass. Lock it on the front of the upper part,
Further, the main body is lowered, and the locking claw portion is slid downward along the surface of the glass plate while maintaining the locking of the locking edge, and the main body is further lowered, and the locking claw portion is caused to slide downwardly along the surface of the glass plate. A jig for lifting a plate glass, characterized in that when the lower edge is reached, the main body swings due to its own weight so that the locking claw portion is positioned below the lower edge of the plate glass. (2) The jig for lifting a plate glass according to claim 1 of the utility model registration claim, characterized in that intermediate portions of the pair of vertical frames are connected by a reinforcing member that also serves as a member for gripping the lifting jig. . (3) The utility model according to claim 1, characterized in that a guide member is vertically provided on the front surface of the horizontal frame to guide the upper part of the plate glass to the locking edge when the lifting jig is lowered. Jig for lifting plate glass.