JPH0414431Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention relates to a glass cutting tool.
The present invention relates to a tool for pressurizing and dividing glass along predetermined cutting lines.

[Conventional technology]

The glass plate is divided by making a cut along the cutting line with a glass cutter with a diamond tip, and then bending both sides of the cut. Especially if the thickness of the board is very thin, please lightly press the cut part or
It is separated by folding both sides by hand. On the other hand, as the plate thickness gradually increases, greater force is required to bend the plate, so a cutting tool is used to divide the plate.

Traditionally used glass cutting tools include pliers-type tools, in which an anvil and a pressurizer are attached opposite the tips of the pliers, and a glass plate is interposed between them to hold the grip of the pliers. By hand-tightening, the anvil and presser are pressed against each other to bend and divide the glass plate.

[Problem that the invention attempts to solve]

However, the above-mentioned pliers method cannot adequately respond to changes in cutting conditions. Because,
For workability reasons, the distance from the fulcrum of the pliers to the gripping part cannot be made very long, so it is not possible to increase the pressing force by hand to a large extent at the tips. Therefore, when the glass plate becomes thick due to insufficient cutting force, cutting tends to be strained. In addition, since both the anvil and the presser move when operated by hand, the anvil tends to slip on the glass surface during cutting, resulting in unstable support, which causes the force applied to the cutting line to become uneven. The cut surface is not smooth.

Furthermore, although it is preferable that the anvil support the glass plates to be wider, if the anvils are wider, the minimum support interval for the glass plates is restricted, and there is a problem in that narrow glass plates cannot be cut.

In order to solve the above-mentioned problems, this invention provides a glass cutting tool that can easily cut glass sheets with a light force even when the thickness of the glass sheet becomes thick, and that can cut glass sheets from narrow widths to wide glass sheets. It is an object.

[Means for solving the problem] In this invention, a swinging link is rotatably connected to one end of a substantially U-shaped frame to which a gripping rod is fixed, and a frame is attached to one end of the swinging link. A pair of anvils are each rotatably attached to both sides of the other end of the frame by rotatably connecting the tip of a drive lever that is rotatably connected to align with the gripping rod. A pressurizer was provided at the other end of the link, and the swing link and drive lever constituted a booster mechanism.

[Effect]

In the glass cutting tool configured as above,
When the drive lever is rotated by applying operating force, the swing link rotates and pushes up the pressurizer provided at its tip toward the anvil. At this time, since the drive lever and the swing link constitute a boosting mechanism,
The operating force applied to the drive lever is sequentially amplified and transmitted to the pressurizer.

Therefore, the cutting force exerted by the anvil and pressurizer is very large, and even if the glass plate is thick, it can be cut with a small operating force.
Furthermore, since the anvil does not move while the drive lever is operated, the cutting tool is stably supported and the cutting portion can be accurately positioned. Furthermore, in the case of a narrow glass plate, the support interval can be narrowed by rotating both anvils, and glass plates from wide to narrow can be broken.

〔Example〕

Next, an embodiment of this invention will be described based on the accompanying drawings.

As shown in FIGS. 1 and 2, a pair of anvils 3, 3 are attached to one end of a substantially U-shaped frame 1 via metal fittings 2, and a swing link 4 is attached to the other end. are rotatably connected by a pin 10, and a pressurizer 5 is attached to the tip of the link 4 facing between the anvils 3 and 3, and a pressurizer 5 is attached to the rear end of the link by a pin 12 to rotate the frame 1. The ends of drive levers 6 that are connected together are rotatably connected via a pin 11. On the other hand, gripping rod 7
is fixed to the frame 1 substantially along the drive lever 6, so that the drive lever 6 can be moved toward and away from the gripping rod 7 with only one hand. In this case, the spring 8 serves to automatically move the drive lever 6 away when it approaches the gripping rod 7, and the stopper 9 can adjust the stroke of contact and separation.

In the drive lever 6, the pin 12 serving as a fulcrum is provided close to the pin 11, and on the other hand, the distance between the pin 12 and the grip portion 6a is set to be extremely large compared to the distance between both pins 11 and 12. Therefore, the operating force applied to the gripping portion 6a is significantly increased by the action of the lever and transmitted to the swing link 4.

On the other hand, the swing link 4 is installed so that the distance from the pin 10 to the pin 11, which serves as a fulcrum, is longer than the distance between the pin 10 and the mounting position of the presser 5. It has come to act as a Therefore, the operating force applied to the drive lever 6 is applied to the drive lever 6 and the swing link 4.
As a result, the force is doubled to push up the pressurizing element 5.

As shown in FIGS. 2 and 3, the anvils 3, 3 are attached to both sides of the lower surface of the metal fitting 2 that protrudes from both sides, and have protrusions 3a, 3a formed at each end, and from the back side. Both sides of the cut in the glass plate pressed by the presser 5 are received as widely as possible to bend the glass plate strongly and make it easy to break. Anvil 3
A relatively soft material such as soft rubber or plastic is used to prevent scratches on the glass surface. The anvils 3, 3 are rotatably connected to the fixture 2 via a pin 13, and hemispherical recesses 14 are formed in two directions around the pin 13 on the mounting surface 2b of the fixture 2. Then, 1/
Ball 16 pushed by spring 15 every two revolutions
It is designed so that it can be stopped by fitting into the recess 14. Therefore, both anvils 3, 3 are connected to the protrusion 3.
If a and 3a are set close to each other, it becomes possible to support a narrow glass plate.

The pressurizer 5 has a thread formed on its outer periphery and is screwed into the end of the swing link 4, and can be rotated to adjust the relative distance to the anvils 3 according to changes in the thickness of the glass plate. It is now possible to cut a wide range of glass plates.
Further, a cap 5a made of urethane rubber or the like is attached to the top of the anvil 3, in the same way as the anvils 3, 3, in order to protect the glass surface during pressing and prevent chipping, and can be replaced as the cap wears out.

In order to cut the glass plate A using the above-mentioned cutting tool, first, the anvils 3, 3 are placed across the glass surface at the cut B, and supported on both sides of the anvils 3, 3. When approached, the swing link 4 rotates to push up the presser 5, and the head 5a of the presser 5 presses the cut B from the back. At this time, the glass plate A supports the anvils 3, 3 and the pressurizer 5.
It is bent by pressing and cut from the cut B. In addition, the operating force applied to the drive lever 6 is
The force is multiplied in two stages by the drive lever 6 and the swing link 4 and transmitted to the pressurizer 5, so that even if the glass plate is thick, it can be cut with a light force. Therefore, there is no strain on cutting, and a uniform cutting force is applied to the cut B, resulting in a clean cut surface.

Note that a plurality of links may be connected in series between the swinging link 4 that supports the pressurizing element 5 and the drive lever 6, each forming a lever, and the boosting mechanism may be configured in multiple stages. good. In this case, the force applied to the drive lever 6 is amplified to an extremely large value and transmitted to the presser element 5, which is further effective in cutting thick glass plates. At this time, by making the booster mechanism continuous, the pressing stroke at the presser element 5 becomes smaller, but on the other hand, the thicker the glass plate becomes, the more likely it is that even a small deformation will cause it to break. Since the pressing stroke is small, it can be used satisfactorily.

In addition, in the case of a narrow glass plate with a narrow width, both anvils 3, 3 are moved to the protruding parts 3a, 3 as shown in Fig. 2.
In the case of a wide glass plate, the protrusions 3a, 3a are set apart as shown by the dashed line in FIG. 3, so that the support interval between the glass plates is widened.

〔effect〕

As explained above, since the power boosting mechanism is constructed by the swinging link that supports the pressurizer and the drive lever in succession, the force applied to the drive lever is significantly increased and the force applied to the drive lever is significantly increased, pushing the pressurizer upward toward the anvil. become,
Even if the glass plate is thick, it can be easily cut.

In addition, since the pair of anvils are rotatably attached, the support interval of the glass plates can be changed according to the width of the glass plate, and glass plates of narrow to wide widths can be smoothly broken.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the present invention;
FIG. 2 is a side view similar to the above, and FIG. 3 is a sectional view showing the anvil mounting structure. 1... Frame, 3, 3... Anvil, 4...
Swing link, 5...pressure element, 6...drive lever,
7...Gripping rod, A...Glass plate, B...Cutting line.

Claims (1)

[Scope of utility model registration request] In a glass breaking tool that breaks a glass plate by pressing an anvil and a pressurizer, which are interposed between them, a swinging link is attached to one end of a substantially U-shaped frame to which a gripping rod is fixed, so that it can rotate freely. and the tip of a drive lever rotatably connected to the frame so as to be aligned with the gripping rod is rotatably connected to one end of the swinging link, and a pair of anvils are rotatably attached to both sides of the other end of the frame. A glass-breaking tool, characterized in that a pressurizer is fixed to the other end of the swinging link facing between the anvils, and a boosting mechanism is constituted by the swinging link and the drive lever.