JPH02179702A - Touch preventing apparatus to teeth of lumber working disk saw - Google Patents

Abstract

PURPOSE:To prevent the touch of finger tips with a disk saw by pivotally supporting on a supporting board a preventing apparatus comprising the upper part covering member of a disk saw and contact member, and a finger movement stoppage guiding member. CONSTITUTION:A disk saw upper part covering member 1 is formed such that it can be rotated freely above the a round saw S as a rotating fulcrum about a pivoted part 11, and a state wherein a contact member 2 being placed into contact with a working table is made a most descended posture. In front of the disk saw S, as the lowermost part of the contacting member 2 comes into the surface of a working material W, and the contacted part, namely, the lowermost part of the contacted member 2 is arranged with a finger movement stoppage guiding member 3, and the forwarding direction of the working material W is interrupted thereby. The fingers of a hand may be in a state of being naturally wrapped around a finger movement stoppage guiding member 3, thus, the fingers are interrupted to come near them to the direction of the disk saw S. Therefore, it is surely prevented to be an unforeseen accident, e.g. the stretching hand is carelessly moved together with the working material W due to carelessness at a certain occasion, and come in contact with the teeth of the disk saw.

Description

Detailed Description of the Invention (Purpose of the Invention) This invention is aimed at preventing a problem in which, when sawing a workpiece with a circular saw for wood processing, the fingertip handling the workpiece accidentally moves with the workpiece and hits the teeth of the circular saw. It is an object of the present invention to provide a device for preventing contact with the teeth of a circular saw for wood processing, which has a novel configuration to prevent contact and injury.

(Prior Art) Safety standards regarding lumber are specified in detail by the Industrial Safety and Health Act. Regarding circular saws, strict standards are stipulated not only for the material strength of the circular saw itself, but also for the attached equipment that ensures the safety of workers when sawing lumber using a circular saw. Naturally, the circular saws and associated equipment that were being sold were supposed to be legal products that had cleared those regulations. However, despite this, there are still reports of tragic accidents in which workers accidentally drop their fingers while sawing.

Among the provisions stipulated by the Industrial Safety and Health Act, regarding attached devices, there is a device for preventing the cutting of processed materials from collapsing. Only the safety standards to prevent it from being thrown up and the contact prevention device, i.e. the cover to prevent the circular saw from being left protruding on the workbench, are required for machining. There are no specific regulations regarding the safety of hands when pushing materials.

Therefore, the reality is that until now there has been no particularly effective measure for safety during work, other than for workers themselves to take the utmost care to prevent accidents. Even if you are an experienced person, depending on your physical condition or when you are extremely busy with work, your attention may become distracted and you may end up in an unexpected accident. It is possible that something has happened.

This invention is the result of many years of struggling to find countermeasures as a person who manages and instructs the field in view of such actual circumstances, and has finally succeeded in realizing an extremely effective device. Its configuration will be explained in detail below.

(Structure of the Invention) As can be understood from the representative embodiments shown in the drawings, the contact prevention device for a circular saw for wood processing of the present invention basically includes an upper cover member 1 for a circular saw and an abutting member. 2, and a finger movement stop guide member 3.

That is, the support plate 4, which is placed upright on the workpiece drawer side of the circular saw S exposed on the workbench T and located on the extension of the cutting center line of the circular saw S, is used as the pivot joint 11, and the pivot joint A circular saw upper cover member 1 extending from the section 11 to the workpiece feed side and reaching the hand side of the circular saw S, and the circular saw upper cover member l.
A contact member 2 is formed on the opposite end side from the pivoting part 11, and has an arcuate side edge shape at least on the workpiece feed side, and is in smooth contact with the surface of the workpiece W to be fed. This is a contact prevention device for the teeth of a circular saw for wood processing, which comprises a fingertip movement stop guide member 3 formed at the lowest point of the corresponding contact member 2 and perpendicular to the workpiece feeding direction. .

The circular saw upper cover member 1 is formed in m-shape so that it can freely rotate above the circular saw S using the pivot portion 11 as a rotation fulcrum, as shown by the arrow in the side view of FIG. The state in which the contact member 2 is in contact with the workbench T is the lowest position, and other than the embodiments shown below, it may be formed by, for example, aluminum casting, press molding of a steel plate, or plastic molding. In order to ensure that the teeth, which are the machining and cutting parts of the circular saw stipulated by law, can be clearly seen during work, the top surface of the end opposite to the pivoting part 11 is divided into a viewing window of an appropriate size. This can be achieved by creating a simplified structure.

As can be seen from the Third National Plan and the Fourth Construction Plan, the pivot portion 11 is attached to the upper end of the support plate 4 so as to have approximately the same width as the inside of the circular saw upper cover member 1. In addition to being formed through the batten members 5, 5, a special metal fitting may be prepared in place of the batten member 5.5, or the end of the circular saw upper cover member 1 may be adsorbed onto the upper end of the support plate 4 in advance. In the figure, 51 indicates a structure in which a batten member 5.5 is clamped to the upper end of the support plate 4. , shows a fixing fitting for fixing.

In addition, in the middle part of the circular saw upper cover member 1, which can cover an appropriate range above the circular saw S, as stipulated by law, there is a A structure incorporating a scattering prevention plate 12 for this purpose is adopted.

The contact member 2 is in contact with the workbench T, as in the example shown in the side view of FIG. A side edge that remains at a predetermined height above the table T and does not obstruct the feeding of the workpiece W to be sawn into the direction of the circular saw S. In order to do this, the side edge shape must be arcuate at least on the side where the workpiece W is fed, so that when it comes into contact with the end of the workpiece W, it should be smooth. The structure is such that it can be inserted into the receiver and smoothly lifted upward using the pivot portion 11 as the rotation axis.

The illustrated embodiment is formed into a semi-circular side shape in the form of a semicircular arc for the reason that it is advantageous in its own molding and that it can be easily and reliably absorbed into the upper cover member 1 of the circular saw. However, depending on the case, it may be a quarter-arc shape, and the circular saw S side may be connected and fixed to the circular saw upper cover member L using an i-wire.

The descending angle adjusting member 6 is installed between the support plate 4 and the circular saw upper cover member 1 as necessary, and when the workpiece W is thick, the abutment member 2 is placed on the workbench T. If the type is in contact with the workpiece W, the angle change of the contact member 2 will be that large, which may cause trouble when feeding the workpiece W. It serves the function of stopping the lowest point of the member W and preventing it from descending below that point.
Place a wedge-shaped piece as appropriate on the wood member 5 and the circular saw 2-way cover member 1
As shown in the figure, the step-like notched members may be shifted and engaged as appropriate, so that the interval between the batten member 5 and the circular saw upper cover member 1 is adjusted to the workpiece to be sawn. It is realized as a W4 structure that can be adjusted to the optimal spacing according to the thickness of the W.

The finger movement stop guide member 3 is a member that is positioned at the lowest point of the abutting member 2 described above, and is arranged so that its axis is oriented in a direction perpendicular to the feeding direction of the workpiece W. 2
The structure shall be securely fixed and supported.

The device for preventing contact with the teeth of a circular saw for wood processing according to the present invention, which has the above-mentioned basic structure, will be explained in more detail based on an embodiment shown in the drawings.

(Example 1) In this example, unlike the basic structure exemplified above, the circular saw upper cover member 1 is arranged side by side and parallel to each other, as can be understood from the perspective view of FIG. It is formed from a pair of steel bars, and a scattering prevention plate 12 is attached between the steel bars located above the circular saw S, and the contact member 2 is also the same as the above-mentioned circular saw upper cover member 1. This is a contact prevention device for the teeth of a circular saw for wood processing, which consists of a pair of parallel arc-shaped steel rods supported by each J14 rod.

In other words, the examples that were included in the basic structure were those in which the entire structure was formed by a combination of surfaces, but as shown in each drawing, the most preferred embodiment One of the features is that the overall shape is made of steel rods to form a skeleton.

(Example 2) The following example uses a circular saw upper cover member 1 and an abutment member 2 whose appearance approximately matches the appearance formed by the skeleton formed using the steel rods described above. This is an example of a contact prevention device for the teeth of a circular saw for wood processing, both of which are made of a transparent flat plate material, such as a transparent plastic plate or a tempered glass plate.

By using a transparent material, the interior can be seen through even if it is formed by other materials, and it is possible to almost eliminate the discomfort that occurs when the view is obstructed, which is the case with aluminum castings, steel plates, etc.

(Operation and Effect) The device for preventing contact with the teeth of a circular saw for wood processing according to the present invention having the above-described configuration is assembled above the circular saw S on the workbench T, and is used to normally cut the workpiece W to be sawn. Feed the saw into the circular saw in the S direction with both hands, as if you were sawing the wood. Then, the tip thread 1 of the workpiece W first hits the abutting member 2 of the device, or by continuing to push it as it is, the tip of the workpiece W hits the abutting member 2, which is formed in an arc shape. The abutting member 2 is pushed up naturally as it goes under along its outer edge, and finally the lowest point of the abutting member 2 is brought into contact with the surface of the workpiece W as shown by the two-point nod line in FIG. Proceed in the direction of circular saw S while letting it slide. Then, the tip of the workpiece W reaches the circular saw S and is sawn.

While sawing progresses in this way, the hand on the tip side pressed against the surface of the workpiece W moves in the direction of the circular saw S together with the workpiece W in order to feed the workpiece W, and if the hand continues to push the workpiece W into the direction of the circular saw S, Naturally, it would reach the circular saw S, so in the past, the worker himself would have to look at the teeth of the circular saw S and put his hand on the circular saw S.
However, with this device, the lowest point of the contact member 2 was in contact with the surface of the workpiece W in front of the circular saw S. , the finger movement stop guide member 3 is arranged at the contact part, that is, the lowest point part of the abutment member 2, and exists in a shape that blocks the feeding direction of the workpiece W, so that the fingers of the hand are not moved naturally. My fingers became entangled with the finger movement stop guide member 3, and my fingers became curly! This means that they will be obstructed from approaching the S direction.

Therefore, the operator moves his/her hand on the distal end side to the finger movement stop guide member 3.
The work is completed by sliding the workpiece W while holding it while still entangled with the workpiece W, and feeding the workpiece W with the other hand remaining at the rear.

Therefore, as before, my attention got distracted for some reason and my hand on the tip side moved along with the workpiece W, causing it to reach ViI of the circular saw S, leading to an unexpected situation. This will ensure that this is not the case.

In particular, in the circular saw in which the upper cover member 1 and the contact member 2 are formed into a skeleton shape using steel rods, in addition to being easy to manufacture, the view is almost obstructed. It is a knife that enables you to carry out work that is difficult to carry out, and can eliminate the discomfort during work to a large extent. This has the advantage of allowing work to be carried out in a stable condition, ensuring even safer lumber work.

Furthermore, even if the circular saw upper cover member 1 and the abutment member 2 are made of a transparent material, they are more difficult to use than those made of other opaque aluminum materials, steel plates, etc.
It can also achieve substantially the same effect as the above in that it can be seen through.

As mentioned above, the device for preventing contact with the teeth of a circular saw for wood processing according to the present invention is unprecedented in terms of safety, manufacturing, etc., as well as handling work. It has advantageous characteristics and makes it possible to carry out efficient and safe lumber work that was not possible with previous methods that simply cleared legal regulations and had little practical consideration. It is expected that this product will receive high praise from those involved in the lumber industry.

[Brief explanation of the drawing]

The drawings are based on representative embodiments of the present invention, and FIG. 1 is a perspective view of the whole in the installed state, FIG. 2 is a side view of the same, FIG. 3 is a plan view of the same, and FIG. 2 and 3 respectively show the same front views. DESCRIPTION OF SYMBOLS 1...Circular saw upper cover member, 11... Pivotal attachment part, 12
...The same scattering prevention member, 2...The contact member, 3...The finger movement stop guide member, 4...The support plate, 5...The batten member, 51...The same fixing metal fitting, 6 ...Descent angle adjustment member, S...Circular saw, T...Work table, W...Working material. Figure 5

Claims (1)

[Scope of Claims] 1. A support plate placed upright on the workpiece drawer side of the circular saw exposed on the workbench and positioned on an extension of the cutting center line of the circular saw is used as a pivot joint, and the pivot joint Extending from the section to the workpiece feed side,
A circular saw upper cover member that reaches to the front side of the circular saw; and a side edge shape formed at the end opposite to the pivoting part of the circular saw upper cover member and having an arc-shaped side edge at least on the workpiece feed side. A contact member formed on the surface of the workpiece to be in smooth contact with the surface of the workpiece to be fed, and a fingertip movement stop guide member formed around the lowest point of the contact member and perpendicular to the direction of feed of the workpiece. A device to prevent contact with the teeth of circular saws for wood processing. 2. The circular saw upper cover member is formed from a pair of horizontally parallel steel rods, and a scattering prevention plate is installed between the steel rods located above the circular saw, and the abutting member also includes: A tooth of a circular saw for wood processing according to claim 1, which comprises a pair of parallel steel rods curved in the shape of an edge supported by each steel rod of the above-mentioned upper cover member of the circular saw. Contact prevention device. 3. The device for preventing contact with the teeth of a circular saw for wood processing according to claim 1, wherein both the circular saw upper cover member and the contact member are formed of a transparent flat plate material.