JPH024106Y2 - - 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. In particular, if the thickness of the board is very thin, tap the cut part lightly 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 grip cannot be made very long, so the pressure force applied by hand cannot be greatly increased at the tips. For this reason, cutting force is insufficient, and when the thickness of the glass plate increases, cutting tends to be difficult. In addition, since both the anvil and the pressurizer are activated by manual operation, 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, in the case of deformed cutting where the cutting line is curved, such as when cutting the frame of a deformable mirror, the anvil is fixed facing a certain direction, so each part of the cutting tool may interfere with the edge of the glass plate. The anvil and pressurizer cannot be brought into proper contact with the cutting line, making it unusable in most cases.

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 plate increases, and that can easily cut both straight lines and deformed lines. The purpose is to

[Means for solving problems]

In this invention, the middle of a swing link is rotatably connected to one end of a U-shaped frame, and the tip of a drive lever rotatably connected to the frame is rotatably connected to one end of the swing link. Therefore, an anvil was rotatably attached to the other end of the frame, and a pressurizer was provided at the other end of the swinging link opposite to the anvil, so that the swinging link and the drive lever constituted a boosting 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 the pressurizer provided at its tip up 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, when the cutting line is a curve, by rotating the anvil, the anvil and the presser can be reliably brought into contact with the glass plate along the cutting line. In other words, both straight and deformed cutting is possible.

〔Example〕

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

As shown in FIGS. 1 and 2, an anvil 3 is attached to one end of a substantially U-shaped frame 1 via a metal fitting 2, and the other end is rotated by a pin 10 in the middle of a swing link 4. A pressurizer 5 is attached to the tip of the link 4 facing the anvil 3.
Further, the tip of a drive lever 6, which is rotatably connected to the frame 1 by a pin 12, is rotatably connected to the rear end of the link via a pin 11. On the other hand, the gripping rod 7 is fixed to the frame 1 so as to substantially follow the drive lever 6, so that the driving 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 the distance between the pin 12 and the operating 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 serving as a fulcrum is longer than the distance between the pin 10 and the mounting position of the presser 5, and the 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 Fig. 4, the anvil 3 has protrusions 3a, 3a formed in parallel along both sides, and is designed to hold as wide as possible both sides of the cut in the glass plate pressed by the presser 5 from the back side. The glass plate is strongly bent to make it more likely to break. As the material for the anvil 3, a relatively soft material such as hard rubber or plastic is used to avoid scratching the glass surface. Further, the anvil 3 is rotatably connected to the fixture 2 via a pin 13,
4 with the pin 13 in the center on the mounting surface 3b with the fixture 2.
A hemispherical recess is formed in the direction so that the two balls 15 pushed by the spring 14 can fit into the recess and be stopped every 1/4 rotation.

The presser 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 anvil 3 according to changes in the thickness of the glass plate. , it is now possible to cut a wide range of glass plates. In addition, on the top of the anvil 3, there is a head 5 made of hard rubber, etc., for the purpose of protecting the glass surface when pressing.
A is attached and can be replaced as it wears out.

To cut the glass plate A using the above-mentioned cutting tool, first, the anvil 3 is placed across the cut B on the glass surface to support both sides of the anvil 3, and then the drive lever 6 is approached to the gripping rod 7. When you do this, 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 side. At this time, the glass plate A is bent by the support of the anvil 3 and the pressing of the pressurizer 5, and is cut from the cut B. In addition, the operating force applied to the drive lever 6 is multiplied in two stages by the drive lever 6 and the swing link 4 and transmitted to the pressurizer 5, making it possible to cut glass sheets with a light force even when the glass plate is thick. . Therefore, there is no strain on cutting, and a uniform cutting force is applied to the cut B, resulting in a clean cut surface.

On the other hand, in the case of deformed cutting where the cutting line B becomes a curve as shown in Fig. 5, or when the cutting line B becomes a curve as shown in Fig. 6,
If the distance to B' is far from the direction of arrow C and the approach is difficult, by changing the direction of the anvil 3, the anvil 3 and the pressurizer 5 can be connected to the cutting line B,
They can be reliably opposed along B′. Therefore, deformed cutting, which was difficult in the past, and cutting in areas where the cutting tool has difficulty approaching can be easily performed.

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 to break even with a small deformation. Since the pressing stroke is small, it can be used satisfactorily.

〔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, if the anvil is rotatably mounted and the cutting line becomes a curve, by changing the direction of the anvil, the anvil and pressurizer can be reliably opposed along the cutting line, allowing both straight and deformed can be cut.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention;
Figure 2 is a front view of the same as above, Figure 3 is a side view of the same as above,
Figure 4 is a sectional view showing the anvil mounting structure;
FIG. 5 and FIG. 6 are diagrams showing the usage state of the same as the above. DESCRIPTION OF SYMBOLS 1... Frame, 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 cutting tool that cuts by pressing a glass plate interposed between an anvil and a pressurizer, the middle of a swinging link is rotatably connected to one end of a U-shaped frame, and the swinging The tip of a drive lever rotatably connected to the frame is rotatably connected to one end of the link, an anvil is rotatably attached to the other end of the frame, and the other end of the swing link is opposite to the anvil. 1. A glass cutting tool, characterized in that a pressurizer is fixed to the holder, and a booster mechanism is configured by the swing link and the drive lever.