JPS6112082Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a folding saw in which the saw blade can be easily replaced with respect to the handle.

By the way, a folding saw in which the saw blade can be moved in and out of the handle has the rear end of the saw blade pivoted to the tip of the handle with a spindle, and the saw blade is rotated around the spindle inside the handle. It is designed so that it can be taken out of the handle from the stored state, so if the saw blade is damaged,
Alternatively, if you want to replace the saw blade with another saw blade, you can simply remove the spindle, but removing this spindle requires a tool, and the present invention allows you to remove the spindle from the handle without using such tools. On the other hand, the saw blade can be easily removed, and the embodiment shown in the figure will be described below.

In the figure, 1 is a saw blade, and 2 is a handle of a folding saw with the rear end of the saw blade pivotally attached to a support shaft 3. The saw blade 1 has teeth 4 on one side edge. At the rear end, there is a shaft hole 5 through which the support shaft 3 is inserted, and a groove 6 whose width is smaller than the diameter of the shaft hole so that the shaft hole communicates with the outside. It is formed in a direction substantially perpendicular to the side edge of the saw blade, and as shown in FIG. It protrudes outward from the circular arc edge,
Further, a projecting edge 9 having a locking portion 7 and a stepped portion 8 is provided at the front and rear portions. Furthermore, the handle 2 has a saw blade 1
A gap 10 for storing the saw blade 1 is formed from the side part to the tip of the two halves, and at the tip of the gap there is a left and right holding plate 11 in which the rear end of the saw blade 1 is sandwiched. is interposed, and
As shown in FIG. 5, this holding plate has a tongue piece 12 that protrudes toward the tip of the handle at the front part of the upper edge 11' formed so as to be able to fit along the outer upper surface of the handle 1.
A protrusion 13 that protrudes upward is provided at the rear of the upper edge. Reference numeral 14 is provided through the holding plate 11 so that when the saw blade 1 is rotated around the support shaft 3 and taken out forward in the extending direction of the handle 2, the step 8 at the rear end of the saw blade can come into contact with the saw blade 1. The shaft rod also has the role of fixing the holding plate 11 to the handle 1. The locking portion 7 provided on the protruding edge 9 at the rear end of the saw blade engages the tongue piece 12 when the saw blade 1 is taken out to a predetermined position outside the handle 2, as shown in FIGS.
and the upper edge 11' of the retaining plate 11 between the protrusion 13
The tongue piece 12 is made to protrude further upwardly, and the tongue piece 12
The upper surface of the saw blade 1 is formed to follow the shape of the back edge of the saw blade 1. Reference numeral 15 denotes a grip piece 16 which is pivotally attached to the protrusion 13 so that the upper part of the handle 1 can be raised upward from the position where it is laid down; The rear end of a hook band 17 is fixed to be engaged with a locking portion 7 at the front portion of the projecting edge 9 when the device is collapsed. Reference numeral 18 denotes a nut provided at one end of the spindle 3 in a small diameter portion 3' formed to allow passage of the cut groove 6 provided in the saw blade. When the support shaft 3 is moved in the axial direction by being pushed into a recess 20 formed in the handle 1, the small diameter portion 3' can be positioned within the shaft hole 5. .

In the saw of the present invention, in order to store the saw blade 1 in the handle 2 from the illustrated use state, the grip piece 15 is raised upward from the position where it is laid down on the upper surface of the handle 2, and the band 17
The band 17 can be pushed into the gap 10 of the handle 1 by rotating the saw blade around the spindle 3 with the saw blade pulled away in front of the locking part 7. By sliding forward on the piece 12 as a guide surface, the band is naturally pulled away from the locking part 7 of the saw blade 1, which is about to move into the holding plate. Furthermore, when in use, the saw blade 1 is taken out of the handle 1 until the stepped part 8 contacts the shaft rod 14 as shown in the figure, and the grip piece 15 is held in a state where the band 17 is engaged with the locking part 7.
By lowering the saw blade 1 toward the upper surface of the handle 1, the saw blade 1 can be held in a locked state with respect to the handle 2.

However, in order to remove the saw blade 1 from the handle 2, the grip piece 15 is raised as described above, the band 17 is removed from the locking part 7, and the saw blade 1 is then rotated at an appropriate angle relative to the handle 2. In the state, nut 18 is spring 1
9 to position the small diameter portion 3' in the shaft hole 5, and then take the saw blade out of the handle 2 along the direction in which the kerf 6 is formed. It is best to install it in the opposite direction as above.

In this way, when using the saw of the present invention, the rear end of the saw blade 1 is pivotally attached to the tip of the handle 2 by the support shaft 3,
The saw blade can be taken out of the handle from the folded state in the cavity 10 of the handle, with the support shaft as the center of rotation, and is provided at the rear end of the saw blade when the saw blade is taken out. In a folding saw that can be locked by engaging a band 17 with a locking part 7, the shaft hole 5 for inserting the support shaft provided at the rear end of the saw blade 1 is inserted into the shaft hole 5 of the support shaft 3. It has a width that allows the small diameter portion 3' provided in a part to pass through, and communicates with the outside through a groove 6 formed approximately at right angles toward the side edge of the saw blade where the teeth 4 are provided. Therefore, when removing the saw blade from the handle, remove the hook band from the locking part of the saw blade, rotate the saw blade at an appropriate angle, and insert the spindle into the shaft hole. By positioning the small diameter part 3',
The saw blade can be pulled out from the handle in the direction in which the kerf is formed, and especially when the present invention is used, the kerf 6 that communicates the axial hole of the saw blade with the outer part is different from the conventional Utility Model Publication No. 37-7492. As shown in the publication, unlike forming the teeth parallel to the direction in which the teeth are formed on the saw blade, that is, toward the pulling direction when the saw blade is used, the teeth are formed parallel to the direction in which the teeth are formed. Since it is formed in a substantially right-angled direction, it eliminates damage caused by the cutting groove deforming into an expanded shape and accidentally coming out of the handle when using the saw blade, and making it possible to use this interchangeable blade type saw at all times. It has the effect of making it safe to use. Therefore, remove the above band from the locking part,
Furthermore, by pushing the support shaft against the spring and positioning the small diameter part of the support shaft within the shaft hole of the saw blade, it becomes possible to remove the saw blade from the handle. There is an effect that the saw blade can be replaced easily and quickly without having to disassemble and remove the support shaft using a tool as in the conventional case.

[Brief explanation of the drawing]

Figure 1 is a side view of the saw of the present invention, Figure 2 is a partially cutaway side view of the main parts, Figure 3 is a sectional view taken along line A-A in Figure 1, and Figure 4 is the rear end of the saw blade. FIG. 5 is a side view of the holding plate.

Claims (1)

[Scope of utility model registration request] The rear end of the saw blade is pivotally attached to the tip of the handle by a support shaft, so that the saw blade can be taken out from the state folded into the handle forward in the direction of extension outside the handle with the support shaft as a pivot center. In addition, in the folding saw, when the saw blade is taken out of the handle, a hook band is engaged with a locking part provided on the back edge of the rear end of the saw blade to lock the saw blade. The shaft hole for inserting the spindle provided at the rear end of the blade is wide enough to pass through the small diameter portion provided on a part of the spindle, and is directed toward the side edge of the saw blade where the teeth are provided. A folding saw with a replaceable blade, characterized in that a cut groove formed at a substantially right angle communicates with the outside.