JPH0432243Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is characterized in that a guide plate is supported so as to be movable up and down from a base to an upright column via an elevating means, and the guide plate is movable back and forth on the guide plate. The present invention relates to a slide lock device for a guide section in a radial arm saw, in which a frame supporting a cutting tool section is rotatably supported by a bearing holder attached so as to be able to be fitted and guided.

[Conventional technology]

Hitherto, various structures have been known as slide lock devices for the cutter parts, but all of them have problems such as multiple structures and troublesome locking and unlocking operations. .

[Problem that the invention attempts to solve]

This invention was an attempt to solve the above problem, and the side part of the bearing holder, which supports the frame to which the cutter part is attached and is engaged with the guide plate so as to be movable back and forth, is curved into a substantially U-shape on the side. The lock spring is installed with the side wall of the guide plate slidably inserted into the U-shaped opening, and the lock spring is configured to be tightenable by screwing the knob onto the bolt attached to the bearing holder. The purpose of this invention is to simplify the sliding locking device of the bearing holder with respect to the guide plate, and to make the locking and unlocking operations simple and easy.

[Means for solving problems]

That is, in the present invention, the guide plate 1 is the elevating means 2.
6, a bearing holder 3 is supported so as to be movable up and down from a base 27 to a column 28, and is fitted and guided so as to be movable back and forth on the guide plate.
A radial arm is formed by a frame 9 to which a cutter part 16 is attached and rotatably supported by a vertical shaft 8.
In the saw, the side wall 3 of the bearing holder
A square hole 18 is provided in a, and a lock spring 19 that fits into the square hole is fitted with the side wall 1a of the guide plate slidably inserted into the U-shaped opening 19g. The lock spring is formed by curving a metal plate from the center into a U-shaped side surface, and the lock spring has both spring plate portions 19a and 19b forming the U-shaped opening 19g, a vertical groove 19d, and both spring plate portions. Elastic pieces 19e, 19e cut upward outward from the lower end,
19f, 19f, and on the other hand, in the bearing holder, a bolt 20 is non-rotatably supported on the back side of the locking spring, and the bolt is inserted into the longitudinal groove 19d of the locking spring so that the protruding end thereof,
Screw on the knob 22 so that the locking spring can be tightened,
This solved the above problems.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.As shown in FIGS. 1 to 4, the guide plate 1 is formed into a substantially downward U-shaped cross section by a U-shaped channel member or the like. and front-back direction (fourth
It is formed to be long in the horizontal direction (in the figure),
The inner surfaces of the left and right side walls 1a, 1a have a cross section of approximately V.
Right-angled V-grooves 2, 2 are long and oppositely provided in the front-rear direction, and each of the right-angled V-grooves 2, 2 has a bearing shaft 4 on each side of the bearing holder 3, respectively.
Four bearings 5, 5 are rotatably engaged in a substantially V-shaped front view, each rotatably and height-adjustably supported while tilting outward. As a result, the above bearing holder 3
is internally supported by the guide plate 1 so as to be movable back and forth.

Shaft holes 6 and 7 are provided vertically and concentrically in the center and bottom of the bearing holder 3, respectively, and the shaft hole 6 in the center is penetrated in the vertical direction. The vertical shaft 8 is made of a hexagonal bolt or the like and has an eastern part 8a at the upper part and a male threaded part 8b at the lower part.The vertical shaft 8 is rotatably held through the frame 9, and its downward protruding end passes through the frame 9. A hexagonal nut 12 is screwed onto a male threaded portion 8b which extends through the central hole 10 and projects downward from the frame 9 with a thrust washer 11 interposed therebetween.

In addition, a shaft portion 9a, which extends from the frame 9 in a manner concentric with the center hole 10 thereof, is rotatably fitted into the other shaft hole 7.

Further, by engaging the U groove 9b provided at the opening edge of the center hole 10 of the frame 9 with the pin 34 protruding from the vertical shaft 8 at right angles, the vertical shaft 8 and the frame 9 are aligned in the periaxial direction. It is fixed to.

In addition, the hexagonal nut 12 has the same hexagonal nut 1.
A tightening lever 13 with a square hole 14 that fits 2.
is detachably attached by a clamp spring 15, and by loosening and tightening a hexagonal nut 12 with the tightening lever 13, the frame 9 is formed to be rotated or fixed relative to the bearing holder 3. ing.

Further, as shown in FIG. 4, a cutter portion 16 is rotatably and fixedly supported on the frame 9 by a horizontal shaft 17.

The slide lock device A is constructed as follows.

A rectangular square hole 18 is provided laterally in the side wall 3a of the bearing holder 3, and a lock spring 19 has a rectangular shape on the front and is bent into a substantially U-shape on the side so that it can fit into the square hole 18. has been completed.

That is, the lock spring 19 is made of a highly elastic rectangular metal plate having an appropriate curvature from the center.
Further, by curving the side wall 1a of the guide plate 1 into a U-shape with an insertable interval, both the front and rear spring plate portions 19a, 19b are formed with spring properties, and the front and rear spring plate portions 19a, 19b are formed with spring properties. There is a longitudinal groove 19 in the center of both spring plate parts 19a, 19b from near both upper ends to a curved part 19c at the lower end.
d are vertically arranged with an appropriate width, and elastic pieces 19e, 19e19f are provided with cuts having a roughly frontal shape on both left and right sides of the lower ends of the spring plate portions 19a, 19b. , 19f are formed by cutting upward and outward.

Further, in the side wall 3a of the bearing holder 3, a hexagonal hole 21 that fits the head 20a of the hexagonal bolt 20 is provided in a portion forming the bottom wall of the square hole 18.
is recessed laterally, and by fitting the head 20a of the hexagonal bolt 20 into the hexagonal hole 21, the hexagonal bolt 20 is held non-rotatably and laterally relative to the bearing holder 3. ,
On the other hand, the lock spring 19 has a longitudinal groove 19d.
The hexagonal bolt 20 is inserted into the square hole 18 of the bearing holder 3 non-rotatingly and upwardly, and the side wall 1a of the guide plate 1 is inserted into the U-shaped opening 19g at the upper end. The hexagonal bolt 20 is inserted into the locking spring 19, and a knob 2 is provided on the portion of the hexagonal bolt 20 that protrudes forward from the locking spring 19.
2 are screwed together so that they can be freely advanced and retracted. By screwing in the knob 22, the lock spring 19 is tightened, and the U-shaped opening 19g is narrowed, and the guide is inserted between the spring plate parts 19a and 19b. By clamping and fixing the side wall 1a of the plate 1, the bearing holder 3 is locked with respect to the guide plate 1, and is configured to prevent back and forth movement.

Further, a stopper pin 23 is attached to the side wall of the bearing holder 3 through a compression spring 24 so as to be slidable and biased inward. Multiple stopper holes 2 drilled at appropriate intervals
By fitting the stopper pin 23 into one of the positions 5..., rotation of the frame 9 relative to the bearing holder 3 is restricted at a desired angle.

FIG. 4 shows an example of a radial arm saw, in which the guide plate 1 is connected to the lifting means 26.
It is configured such that it is movable up and down from a base 27 to an upright column 28 via an intervening column, and is supported horizontally.

Further, the cutter section 16 is connected to a motor case 29.
, a motor (not shown) installed in the motor case, and a circular saw 30 rotated by the motor.
, a safety cover 31 of the circular saw 30, and an operating handle 32 for moving back and forth. 33 indicates a table fixed on the base 27.

[Effect of the invention] As explained above, since the slide lock device of the guide portion of the radial arm saw according to the present invention is configured, the guide plate 1 can be moved back and forth along with the blade portion 16. There is a square hole 18 on one side of the bearing holder 3 which is fitted inside.
A square locking spring 19 whose side surface is approximately U-shaped is fitted and held in a non-rotating manner, and a knob 22 is screwed onto a hexagonal bolt 20 which is non-rotatably supported by the bearing holder 3. The lock spring 19 is tightened by screwing in the lock spring 19, and the side wall 1a of the guide plate 1 is clamped and fixed to the U-shaped opening 19g.
Since the bearing holder 3 is locked against the metal plate, it is possible to simplify the sliding locking and unlocking work of the bearing holder 3 by simply screwing the knob 22 back and forth, and also to make the metal plate A simple locking spring 19 that is just curved into a letter shape, a hexagonal bolt 20, and a knob 2
It can be constructed with only 2 parts and has a simple structure, so it can be manufactured at a low cost.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view showing an embodiment of the slide lock device of the guide section of the radial arm saw according to the present invention, and Figs. 2 and 3 are a front view and longitudinal sectional side view of the main parts of the same embodiment. 4 are side views showing an example of a radial arm saw. 1... Guide plate, 1a... Side wall, 3...
Bearing holder, 3a...Side wall, 8...Vertical shaft, 9...Frame, 16...Cutter section, 18...
Square hole, 19... lock spring, 19d... vertical groove,
19g...U-shaped opening, 20...Hexagonal bolt, 2
2... knob, 26... lifting means, 27... base, 28... column.

Claims (1)

[Scope of utility model registration request] The guide plate 1 is supported so as to be movable up and down from a base 27 via a lift means 26 to a column 28 erected, and the blade part 16 is attached to a bearing holder 3 that is fitted and guided so as to be movable back and forth on the guide plate. In a radial arm saw in which a frame 9 is rotatably supported by a vertical shaft 8,
A square hole 18 is provided in the side wall 3a of the bearing holder, and a lock spring 19 that fits into the square hole is fitted with the side wall 1a of the guide plate slidably inserted into the U-shaped opening 19g. The lock spring 19 is formed by curving an elastic metal plate from the center into a U-shaped side surface. Elastic pieces 19e, 19e, 19f, 19f cut upward outward from the lower ends of both spring plate parts
On the other hand, in the bearing holder, a bolt 20 is non-rotatably supported on the back side of the lock spring, the bolt is inserted into the longitudinal groove 19d of the lock spring, and the lock spring is fastened to the protruding end thereof. A slide lock device for a guide part in a radial arm saw, characterized in that a knob 22 is screwed on so that it can be attached.