JPS6294254A - Grinding machine for glass plate - Google Patents

Abstract

PURPOSE:To enable chamfering regardless of size by forming a support conveyor device and a pressing conveyor device with wide toothed belt conveyors, and attaching a thin plate member having elasticity to the surface of a holding member on the peripheral surface of a belt. CONSTITUTION:A glass plate 5 is sent while being interposed in a gap 47 between the toothed belt 11 of a supporting conveyor device 1 and the elastic member surface 46 of the holding member 21 of a pressing conveyor device 2, by means of a vertical conveyor (not shown). The holding member 21 is adjusted and positioned in such a way that it can hold the glass plate 5 most firmly in accordance with the width (height in vertical direction) of the glass plate, a chambering angle, and a chamfering depth, and that the grinding wheel 6 of a grinding wheel device 3 is not brought into contact with the bottom end of the holding member 21. And the glass plate 5 is chamfered while being sent. Since a stepped part 55 between the bottom end 54 of the toothed belt 11 of the supporting conveyor device 1 and the bottom end 53 of a thin plate member 43 can be made smaller, the glass plate 5 can be maintained in an accurate position, enabling accurate grinding for chamfering.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a glass plate grinding device such as a bevel machine that chamfers the straight edge of a glass plate, and an etching machine that grinds a straight cut of a glass plate. Regarding.

In other words, the glass plate is placed in a vertical position with the edge to be ground facing downward (strictly speaking, slightly tilted from the vertical plane), the front and back surfaces are held between a pair of conveyors, and the glass plates are arranged in series while being conveyed in a straight line. The present invention relates to a glass plate grinding device for grinding the lower end of a glass plate using a plurality of grinding wheels.

Traditionally, a pair of conveyors that sandwich and convey glass plates are
This is a combination of a support conveyor that supports the glass plate like a surface plate, and a pressing conveyor that presses and fixes the glass plate against the support conveyor.

In beveling machines that perform chamfering, the pressure conveyor has a narrower conveyor width than the supporting conveyor, and its lower end is
A plurality of grinding wheels are arranged in series below this pressing conveyor, which is located above the upper edge of the glass plate being conveyed, and the supporting conveyor is positioned above the top edge of the glass plate to be conveyed. The lower end of this support conveyor is located below the lower end of the pressure conveyor and above the upper edge of the glass plate.

When a glass plate is held between a pressure conveyor and a support conveyor, at the stepped portion that occurs between the lower end of the pressure conveyor and the lower end of the support conveyor, the - side of the glass plate is supported by the support conveyor, and the other side is on the pressure conveyor side. The top edge is exposed from the bottom of the conveyor.

Then, use a grinding wheel to remove the exposed upper and lower edges.
It is designed for chamfering and grinding.

On the other hand, an etching machine that grinds a straight cut on a glass plate has the following features: (1) Like the beveling machine shown above, the pressure conveyor is narrower than the support conveyor, and a step is formed between it and the support conveyor. (2) A structure in which both the pressure conveyor and the support conveyor have the same width. Also, in the case of shearing, a grinding wheel is placed below the pressure conveyor and the support conveyor to grind the lower end cut of the glass plate.

[Prior art] (1) A system in which both the press conveyor and the support conveyor are made into a caterpillar conveyor by attaching a strip-shaped holding member to an endless chain; There is a method.

(3) Also, the press conveyor is a caterpillar conveyor,
There is also a bell 1-conveyor system in which a flat belt is used as the support conveyor.

When a glass plate is held and conveyed by a caterpillar conveyor, the glass plate is held by each holding member, and the holding members are supported by a guide slide so that the glass plate slides on the guide slide.

However, in the case of this caterpillar conveyor, wear progresses on the sliding surface of each holding member depending on the lightness of the operating period, and gradually looseness (when holding a glass plate) occurs, making it impossible to maintain the correct posture. It disappears. In particular, since wear progresses differently in each holding member, the feeding line (constant straight line) of the glass plate is not determined, and chamfering etc. cannot be performed correctly.

On the other hand, in the case of a belt conveyor, when a heavy glass plate is pinched and conveyed, slippage occurs between the belt and the drum driven by this belt, stopping the conveyance or causing a knock-out phenomenon, which may prevent normal grinding. Processing may become impossible.

Further, there is a speed difference between the pressing conveyor and the supporting conveyor, and the clamped glass plate may tilt in an unstable manner or cannot be accurately fed.

Furthermore, the size of the glass plate that can be chamfered and etched is limited by the distance between the steps between the pressure conveyor and the support conveyor.

A glass plate of a size smaller than the distance of the above-mentioned step cannot be held. Furthermore, a glass plate whose size is slightly larger than the distance between the steps has a weak holding power and easily moves during the grinding process, making it impossible to grind it.

That is, if a grinding device capable of beveling a wide width is manufactured, it will not be possible to cut or grind a small 4f size glass plate. On the other hand, if a small glass plate is beveled and ground with a small step, the grinding wheel will cover the glass plate widely (with a small beveling angle) to perform wide beveling. ), the grinding wheel will come into contact with the pressure conveyor, making chamfering impossible.

Therefore, as a countermeasure to this problem, in conventional grinding equipment,
There is a grinding device in which a support conveyor is vertically movable relative to a pressure conveyor.

For wide chamfering, the support conveyor is lowered to lower the line below which the glass plate passes and to widen the coverage of the grinding wheel on the glass plate.

When grinding a small-sized glass plate, raise the position of the support conveyor to raise the glass plate passage line and reduce the difference in level between the pressure conveyor and the support conveyor. The step is made smaller to hold a small glass plate, and the amount of overlap of the grinding wheel on the glass plate is reduced so that narrow chamfering can be performed. However, in this type of grinding device, the passage line (lower side) of the glass plate changes as the support conveyor moves up and down, so the glass plate feed conveyor and take-out conveyor connected to the device body are moved up and down each time. have to adjust. In addition, since the passage line of the glass plate relative to the grinding wheel changes, the water supply pipe, etc. relative to the grinding wheel must be adjusted, and the attitude and position of the grinding wheel that have been adjusted in advance must be readjusted. The position may change and the grinding wheel may have to be replaced.

Therefore, the present invention aims to provide a grinding device that eliminates the defects of the conventional grinding devices as described above.

In other words, both the pressure conveyor and the support conveyor do not slip and are always moved at the same speed (without any speed difference), and the glass plates are held firmly so that each glass plate always moves in a constant straight line. Our goal is to provide glass plate grinding machines designed to Another object of the present invention is to provide a grinding device that can freely chamfer and grind small-sized glass plates as well as wide-width chamfers, without changing the passage run of the glass plate at all. Regardless of whether the chamfer width is wide or narrow, the purpose of the present invention is to provide a grinding device that performs grinding while maintaining the same posture and other conditions of the grinding wheel.

Another object of the present invention is to provide a grinding device that can hold the glass plate completely firmly during chamfer grinding of a small-sized glass plate, can freely change the holding portion of the glass plate, and can also freely change the chamfer width.

[Specific Example] Without limiting the present invention, in order to better understand the purpose of the present invention, a specific example of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the glass plate grinding machine includes a support conveyor device 1, a pressing conveyor device 2, a grinding wheel device 3, and a base 4.

The base 4 has a structure in which a support conveyor device 1, a press conveyor device 2, and a grinding wheel device 3 are each mounted and arranged in order to grind the glass plate 5.

The grinding wheel device 3 includes a grinding wheel 6 for rotating and grinding the glass plate 5, a motor 7 for rotationally driving the grinding wheel 6, and adjusting the approach and separation of the motor 7 from the glass plate 5. A member 8 for adjusting the depth at which the wheel 6 grinds the glass plate 5 and the angle of the motor 7 with respect to the glass plate 5, that is, the grinding wheel 6
and a member for adjusting the angle with respect to the glass plate 5.

The support conveyor device 1 had two bearing devices 9 and 9 attached near both longitudinal ends of the base 4, respectively, and a shaft rotatably supported by the bearing portions of the respective bearing devices 9. Toothed pulley 10 and these toothed pulleys 10
A wide toothed belt 11 that is hung on each of the toothed belts 11 and 10 and circulates along the rotating direction of the toothed pulley 10, a support plate 12 that supports the toothed belt 11 from the inside and provides a reference surface, and A belt guide member 13 is attached to the plate 12 and performs vertical positioning of the toothed belt 11, a support conveyor frame 14 to which the support plate 12 is fixed, and a support conveyor frame attached below the support conveyor frame 14. 14 toward and away from the press conveyor device 2, and a horizontal slide device 16 attached to the base 4 so that horizontal movement adjustment is performed by a horizontal slide adjustment knob 15.

The press conveyor device 2 includes a toothed pulley 18 having a shaft 17 that is attached near the nine longitudinal ends 1r of the base 4 and rotatably supported, and at least one pulley shaft 17 of the toothed pulley 18. A drive device (not shown) that rotates and drives the toothed pulleys 18, a toothed belt 20 on the pressing side that performs circulation drive, and a toothed belt 20 on the pressing side that is hung on each of the toothed pulleys 18 that is rotationally driven. a member 21 for holding a large number of attached glass plates 5;
A press conveyor frame 22 that supports and slides into contact with the toothed belt 20 to which these holding members 21 are attached; a press conveyor frame 22 that is attached to the press conveyor frame 22 and guides the toothed belt 20 in the circulation direction while defining its vertical position; A guide 23 is provided for this purpose.

The press conveyor device 2 is held in a held state by vertical slide devices 19 and 19 provided at two positions on the left and right sides. One of these vertical slide devices 19 and 19 is fixed to a bracket 34 erected from the base 4.

The press conveyor device 22 is adapted to move and adjust its vertical position by these vertical slide devices 19 and 19 while maintaining parallel to the support conveyor device [1].

Each vertical slide device 19 includes a slide table 28 fixed to the press conveyor frame 22 and a bracket 34.
It consists of a slide member 25 attached to the slide member 25, a screw 30 assembled into the slide base 28 via bearings 27 and 27, and a nut 24 screwed onto this screw 30, and this nut 24 is fixed to the slide member 25. has been done.

With the rotation of the screw 30, the slide base 2 is inserted through the nut 24.
8 is moved up and down with respect to the slide member 25 by a slide handle 31 which is fixed to the base 4 via a bracket 34.

In addition, vertical slide devices 19 and 19 installed at two locations
is a bevel gear device 3 on each screw 30 and 30.
2 and 32 are assembled, and these bevel gear devices 32 and 32 are connected by a line shaft 26. A handle 31 fixed to the line shaft 26 allows the left and right vertical slide devices 19 to be operated integrally.

The feeding conveyor device 35 is configured to move the vertically erected glass plate 5 to be ground while being vertically supported by the feeding endless belt 36.

The take-out conveyor equipment 33 is configured to take out the ground glass plate 5 while being held vertically between the press conveyor device 2 and the support conveyor device 1, and to take out the glass plate 5 while being vertically supported by the endless belt 37.

As shown in FIGS. 3 and 4, the holding member 21 has a base member 38 having a rectangular shape. The glass plate 5 protrudes and is to be held from this lower end 40 position.
A thin plate-like member 43 is attached which is bent at an angle α toward the glass plate 5 and bent at an angle β from a position 42 below the upper end 41 toward the glass plate 5 to be held. The base member 38 is made of a hard metal material such as aluminum, and is firmly attached to the toothed belt 20 via poles 44 and 44 at the top and bottom. The thin plate-like member 43 is preferably made of metal such as steel, and is required to strongly press the glass plate 5 elastically at the bent portion. Thin plate member 43
An elastic member 45 is bonded to the surface side of the glass plate 5 that holds the glass plate 5 so as not to damage the glass plate 5 and to prevent it from elastically slipping.
The surface 46 in contact with the glass surface is formed so as to apply an average stress to the glass surface. This elastic member 45 is preferably formed of a material such as rubber that has a soft enough surface to firmly hold the glass plate 5 without damaging it. Further, it is preferable that the angles α and β are the same.

In the figure, 29 is a guide that prevents the holding member 21 from bending forward. 48 in the figure is a sliding surface of the press conveyor 2.

The glass plate grinding apparatus configured in this manner operates as follows. As shown in FIG. 1, first, the endless sending bells 1 to 3G of the feeding conveyor device 35 are moved toward the gap 47 in a direction along the gap 47 formed by the support conveyor device 1 and the pressing conveyor device 2. It is driven by a suitable driving means (not shown). The toothed belt 20 of the press conveyor device 2 is also driven by a suitable drive means (not shown) via the toothed pulley 18, and the holding member 21 attached to the toothed belt 20 moves in the direction of the arrow. are doing. In this state, the glass plate 5 is
The scissors are placed vertically on the endless belt 3c of the feed conveyor device 35, and are held in the gap 47 formed between the holding member 20 of the press conveyor device @2 and the toothed belt 11 of the support conveyor device 1. It is conveyed by the feed conveyor device 35 so as to be placed therein.

While moving through this gap 47, the glass plate 5 is supported only by the clamping force formed by the toothed belt 11 of the support conveyor device 1 and the holding member 21 of the pressing conveyor device W2. The gap 47 is adjusted in advance by the horizontal slide device 16 of the support conveyor device 1 so as to obtain the necessary clamping force depending on the thickness of the glass plate 5 to be ground.

The holding member 21 of the press conveyor device 2 takes into consideration the width of the glass plate 5 to be ground, that is, the height in the vertical direction, the chamfer angle, the chamfer depth, etc. The grinding wheel 6 of the grinding wheel device 3 can be firmly held, and the grinding wheel 6 of the grinding wheel device 3 can be
It is adjusted by the slide device 25 to a position where it does not come into contact with 8.

The glass plate 5 conveyed vertically by the endless belt 36 of the conveyor device 35 is held by the holding member 2.
1 and a toothed belt 11, and is subjected to grinding such as chamfering by a grinding wheel 6 while being held and conveyed in the direction of the arrow.

The glass plate 5 is conveyed in an upright state while being supported by the clamping force, and is taken out.

In the above-mentioned specific example, since a part of the thin plate member 43 protrudes from the lower end 40 of the base member 38 of the holding member 21 and is bent at an angle α toward the glass plate 5 to be held, the grinding wheel device f3 The grinding surface 51 of the grinding wheel 6 of
This makes it possible to approach a position perpendicular to the chamfered portion 52 of the glass plate 5 that is vertically clamped, that is, it becomes possible to chamfer with a wide chamfering width, and at the same time, the slide upper and lower screws of the press conveyor device 2 By moving the holding member 21 up and down by the device 11f25, the lower end 53 of the thin plate member 43 is moved to a position where it does not contact the grinding surface 51 of the grinding wheel 6, in other words, the lower end 53 of the thin plate member 43 is moved to the grinding surface 5.
1 and the surface of the glass plate 5, that is,
It is possible to reduce the step 55 between the lower end 54 of the toothed belt 11 of the support conveyor device 21 and the lower end 53 of the thin plate member 43, and it is possible to maintain the glass plate 5 in an accurate position, thereby making it possible to maintain the glass plate 5 in an accurate position as desired. Grinding may be performed.

[Effects of the Invention] Both the support conveyor 1 that clamps and conveys the glass plate and the press conveyor 2 are configured as toothed belt conveyors in which wide toothed belts 11 and 20 are incorporated.
Even when heavy loads are applied to the conveyor belt due to the conveyance of heavy-duty glass plates, there is no slip ring, and the conveyance is carried out reliably, and there is no speed difference between the conveyor belts (between the support conveyor 1 and the pressure conveyor 2). does not occur.

The glass plates are always fed in synchronization, and the glass plates held in the glass plate do not change their posture due to misalignment, and are fed in a reliable posture.

In particular, if a reinforced toothed belt (for example, an iron core wire is used as the core) or a belt with reinforced toothed parts is used, it becomes an ideal glass plate conveying means.

In addition, even though the wide toothed belts 11 and 20 slide on the support plate or on the guide surface, they do not cause serious wear on the holding pieces unlike a caterpillar conveyor, and the glass plate , constant linear feed is always performed. For this reason, uniform chamfering is performed, and cut edge polishing with high linear accuracy is performed.

Furthermore, in the case of a press conveyor, since the holding member 21 that holds the glass plate is attached to a wide toothed bell l-2, the toothed belt 20 has a structure in which joints wear out like a caterpillar chain. There is no stretching of drumming or rattling due to such factors. For this reason, each holding member 21 has a tilting movement,
There is no free movement, and the glass plate is firmly held and fed in the correct posture.

Furthermore, the step 55 between the lower end 54 of the support conveyor device 1 and the lower end 53 of the press conveyor device 2 (namely, the lower end of the thin plate member 43) can be freely changed.

For this reason, the size of the glass plate is large and the width of the chamfer (
When performing beveling), the press conveyor 2 is raised and the step 55 is increased, so that the grinding wheel 6 can cover the glass plate 5 with a small angle without contacting the holding member 21 of the press conveyor 2, etc. It can be covered over a wide area (solidly), and wide chamfering can be performed freely.

On the other hand, since each holding member 21 of the press conveyor 2 has a thin plate-like member 43 extending downward from the lower end of the base member 38, by lowering the press conveyor 2, the thin plate-like member 43 can be attached to the grinding wheel 6. It can be positioned between the glass plate 5 and the glass plate 5.

Since the thin plate-like member 43 is thin as attached to the holding member 21, it can be positioned between the glass plate 5 and the glass plate 5 without being connected to the grinding surface 51 of the grinding wheel 6, and the glass plate 5 can be held. In this state, the grinding wheel 6 is placed over the glass plate at a small angle, but the grinding surface 51 is not the same as the thin plate member 4.
There is no contact with 3.

Therefore, the small-sized glass plate 5 can be held as close as possible to the grinding point and held firmly, allowing stable and accurate chamfering and etching of the cut surface.

Furthermore, by adjusting the vertical position of the pressing conveyor 2 when chamfering a small-sized glass plate, the position where the thin plate-like member 43 holds the glass plate 5 can be freely changed. Each wheel can be chamfered and ground according to the board.

Furthermore, the present invention has a structure in which the pressing conveyor 2 is adjusted up and down, and thin plate-like members 43 are attached to the pressing conveyor 2, and these thin plate-like members 43 are inserted between the grinding wheel 6 and the glass plate 5. 'MI' allows chamfering and grinding of small glass plates by inserting the
Since it is Ia, the passage line (lower side) of the glass plate does not change at all.

Therefore, there is no need for complicated operations such as readjustment and replacement of the grinding wheel, and vertical adjustment of the feed conveyor and take-out conveyor, as seen in the conventional grinding apparatus described above.

[Brief explanation of drawings]

Fig. 1 is a plan view of an example of one unit of the present invention, Fig. 2 is a sectional view of the specific example shown in Fig. 1, Fig. 3 is an enlarged sectional view of the pressure conveyor device, and Fig. 4 is an illustration of the pressure conveyor. FIG.

Claims (1)

[Claims] A support conveyor device that supports and conveys the glass plate in a straight line, and a press conveyor device that presses the glass plate against the support conveyor device, while the glass plate is being held and conveyed, the glass is cut by a grinding device arranged along these conveyor devices. In a glass plate grinding machine that grinds the lower end of the plate, the support conveyor device and the pressure conveyor device include:
It is configured as a toothed belt conveyor incorporating a wide toothed belt, and a holding member for holding a glass plate is arranged in parallel on the circumferential surface of the toothed belt of the press conveyor device, and further,
A glass plate grinding machine in which an elastic thin plate member is attached to the surface of each of these holding members, and the glass plate is pressed and conveyed by the support conveyor by these thin plate members. .