JPH0618741Y2 - Curtain rail cutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a curtain rail cutter.

[Prior Art] Conventionally, as a curtain rail cutter, a so-called push-cut type cutter has been widely used which is cut by a knife-shaped cutting blade.

[Problems to be solved by the invention] However, since the object to be cut is usually a curtain rail having a hollow inside rail and a runner groove at the bottom, which has a C-shaped cross section, a rectangular shape, etc. When cutting with a type of cutter, usually in the curtain rail, to prevent the curtain rail from being crushed by the push-cutting force,
It required an insert member to be loaded into the entire inside, and had to purposely manually insert the insert member to both ends of the rail to a desired cutting position. (Actual Kosho 4
(6-3430 gazette, etc.) Moreover, since it is necessary to secure a cutting site, it must be inserted so as to have a certain gap, work efficiency is extremely poor, and the cutting surface is not so sharp. Further, since there are various types of curtain rails according to their cross-sectional shapes, a large number of types of insert members are required accordingly, and there is a fatal drawback that cutting cannot be handled uniformly.

On the other hand, from the viewpoint of improving work efficiency, it is easy to adopt a circular saw blade instead of the push-cut blade. However, it is not currently used as a cutter for this kind of curtain rail. This is because, if a known circular saw blade type cutter is used as it is, the cutting force is too large, and the cutting force is too great, especially in the case of a hollow rail having a groove of a curtain runner, such as a C-shaped section or a square section. This is unfavorable because it causes chattering due to the rotating force, and the cut surface is dirty due to peeling off of paint and the like rather than the conventional push-cut type. Therefore, the reality is that we have no choice but to rely on a push-cut type cutter.

Therefore, the present invention is intended to provide a suitable circular saw blade type curtain rail cutter which can be used for any curtain rail, has a clean cut surface, is easy to handle and can be processed quickly.

[Means for solving the problem] When adopting a circular saw blade type cutter, an original fixing means that opposes the rotating force of the circular saw blade, can cut any kind of curtain rail, and is easy to handle is necessary. Then, when observing various curtain rails, although the cross-sectional shapes of the curtain rails are various as described above, attention is paid to the fact that the groove shape of the runner groove formed at the bottom of the curtain rail is relatively uniform. In the invention, one end of the guard body to which the circular saw blade is attached is rotatably supported on the base, and an elongated blade receiving hole into which the circular saw blade penetrates is formed in the base. , Provided with a fixed vise and a moving vise for holding the curtain rail in the direction intersecting the blade receiving hole,
Between the fixed vise and the moving vise, a fitting member that fits into the runner groove of the curtain rail from the opening is attached.

The fitting member may be integrally fixed on the base,
It is desirable that the base be attached non-fixedly. For example, a guide hole for a fitting member that is parallel to the blade receiving hole is provided between the fixed vise and the moving vise, and the fitting member is moved between the fixed vise and the moving vise along the guide hole. In particular, in the case where the fitting member is an independent single fitting member including a fitting portion that fits into the runner groove of the curtain rail and an inverted T-shaped portion that locks on the back side of the base through the guide hole, Since the inverted T-shaped portion can be inserted into the guide hole and can be locked by rotating, it becomes a detachable attachment.

The guide hole has a structure corresponding to the locking structure of the fitting member, but an inverted T-shaped portion may be provided in the moving vise so as to be shared as the moving hole of the moving vise. In this case, in order to securely fix the object to be cut, make the guide holes as wide as possible based on the width of the moving vise, and make both ends of the fitting member concave to fit with the edges of this guide hole. Is desirable.

By the way, when cutting with a circular saw blade, it is indispensable to adopt an original fixing means as described, but it is preferable that the circular saw blade itself is also devised for curtain rails. In other words, it is important for the object to be cut that is hollow and has an open bottom so that it does not cut too much and is difficult to bite,
Ideally, the cutting method is to cut as gradually as possible. Therefore, we also devised the following circular saw blade with a cutting edge of ultra-steel chip. That is, the blade portion of the circular saw blade is a first blade having at least the tip of the blade tip tapered on both side surfaces in the front shape and a second blade having an anti-taper shape on both side surfaces, and the blades are alternated. The rake face of each blade is slightly inclined, and the land having a clearance angle is slightly raised in the heel portion. This is because the tip portion of the blade tip is formed by alternately arranging a first blade having a tapered shape on both side surfaces and a second blade having an anti-tapered shape on both side surfaces in a front shape, by a unit blade portion. The cutting position is divided into an intermediate part and both ends, and the cutting process is performed alternately alternately in a cycle of both ends-intermediate part-both ends, in order to avoid cutting into the unit blade part as much as possible. is there. For the same reason, the land with the clearance angle of each blade is slightly raised in the heel portion. On the other hand, however, the cutting action must be ensured, so the rake face of each blade is slightly inclined.

When using a circular saw blade, it is especially important to ensure work safety.However, in consideration of this point, the guard body that covers about a half circle of the circular saw blade requires about 1 /
A safety cover that covers 4 yen and is stored inside the guard body is attached so that it can be rotated elastically in the anti-storage direction, and this safety cover has an open edge that is in front of the curtain rail fixed to the vise. Find the storage lever installed on the upper edge,
From the standpoint of improving safety when cutting rails, the blade is configured to be exposed as little as possible.

[Operation] Therefore, according to the cutter of the present invention, the curtain rail to be cut is fitted into the fitting member mounted on the base at the opening of the runner groove, and the moving vise is moved and pressed against the fixed vise. After holding and fixing the curtain rail in question, push down the rotating circular saw blade to the front side, and in the firmly fixed state, from the depth side of the rail, that is, the upper edge of the fixed vise side of the rail. The cutting proceeds gradually without biting in and the coating film does not peel off. At this time, if a safety cover with a storage lever is attached to the guard body, as the circular saw blade cuts the rail toward you, the storage lever that hits the front upper edge of the rail at the same time fires. Since the safety cover is housed in the guard body against the force, the cutting progresses without constantly exposing the blade more than necessary, thereby ensuring a safe working environment at all times.

[Embodiment] FIG. 1 is a perspective view showing an embodiment of the curtain rail cutter of the present invention, in which 1 is a circular saw blade and 3 is a base of the cutter. The circular saw blade 1 is fixed to a motor shaft mounted in the central portion of the guard body 2 as shown in the figure, and the circular saw blade 1 is protected by a protective cover 2a that constitutes the outer peripheral portion of the guard body 2.
About half a circle of is covered. One end of the guard body 2 is rotatably supported by a bearing portion 4 provided at a depth position of the base 3, and a constant spring force is applied by a tension spring 5 in a counter-pushing direction. There is.

On the other hand, reference numeral 6 is a blade receiving hole of an elongated circular saw blade 1 bored in the depth direction of the base 3, and enters when the guard body 2 is pushed down against the tension spring 5 toward the front side. It is possible. The base 3 is also provided with a fixed vise 7 and a moving vise 8 for sandwiching an object to be cut in a direction perpendicular to the blade receiving hole 6 as shown in the figure. By rotating the vise handle 10 at the end of the vise screw 9, movement toward and away from the fixed vise 7 is possible. The fixed vise 7 is preferably formed at a position where the cutting of the circular saw blade 1 can start from the upper edge of the curtain rail fixed to the vise, which is closer to the fixed vise 7.

Reference numeral 11 is a fitting member mounted between the fixed vise 7 and the moving vise 8. The fitting member 11 has a C-shaped cross section,
It works extremely effectively in securely fixing the curtain rail 12 of a square shape or the like. That is, as shown in the drawing, the curtain rail 12
By directly fitting into the opening in the runner groove 13 for mounting the curtain runner formed on the bottom of the rail, the shape of the entire rail is stabilized, and the fixation from both vices becomes reliable. The fitting member 11 of this embodiment is configured as an independent single attachment, and as shown in FIG. 1, it is parallel to the blade receiving hole 6 of the circular saw blade 1 and between the fixed vise 7 and the moving vise 8. The structure is detachably attached to the guide hole 14 that is provided. That is, FIG. 6 shows the fitting member 11 of this embodiment, which includes the fitting member 11a fitted into the runner groove 13 of the curtain rail 12 and the guide hole 1.
It is composed of an inverted T-shaped portion 11b which passes through 4 and is locked to the rear surface side of the base. Reference numerals 11c and 11d are recesses that are fitted to both end edges of the guide hole 14. In this embodiment, the guide hole 14 is formed as the attaching / detaching means of the fitting member 11 as described above, but since it is formed between the fixed vise 6 and the moving vise 7, the guide hole 14 is formed. Since it slides along the curtain rails, it is possible to handle curtain rails having different diameters or different sizes.

In addition, in this implementation, the moving vise 8 is also provided with the guide hole 1
There is a T-shaped part that passes through 4 and locks to the back side of the base.
The moving vise 8 can be slid.

Reference numeral 15 is a motor, and 16 is a grip.

By the way, in the guard body 2 of this embodiment, as shown in FIG. 1, apart from the protective cover 2a, a safety cover 17 that can be stored in the protective cover 2a corresponds to about 1/4 yen of the circular saw blade 1. The safety cover 17 is rotatably attached so as to cover it, and the safety cover 17 is provided with a spring action in the opposite storage direction, that is, the direction in which the safety cover 17 pops out from the protective cover. Reference numeral 18 denotes a substantially U-shaped stopper attached to the end of the safety cover 17 on the storage side, and the open end of the stopper 1 is formed on the protective cover 2a.
It hits 9 and prevents the pop-up more than necessary. A storage lever 20 is attached to the end of the safety cover 17 on the side opposite to the storage side on the vise side as shown in the drawing. The storage lever 20 is designed so that, before the circular saw blade 1 hits the curtain rail 12 to start cutting, the curtain lever 12 is hit to the curtain rail 12 fixed to the vise at an upper edge slightly near the cutting position and closer to the vise. The circular saw blade 1 is held in a completely covered state by about 270 degrees in angle from the vicinity of the cutting until the cutting starts, progresses, and ends. Furthermore, the storage lever 20 has a lower edge portion which is curved in a relatively streamlined shape, and the open end portion of which extends to the maximum separation position of the moving vise 8 from the fixed vise 7. Even if the size and shape of the cut product are different, it is possible to cope with it.

Since this embodiment has the above-described configuration, when cutting, the inverted T-shaped portion 11b of the fitting member 11 is first fitted into the guide hole 14 located in the center of the base 3 and rotated by 90 degrees to be mounted.
Since the fitting member 11 slides on the side edge of the guide hole 14 in the recesses 11c and 11d, the fitting member 11 is slid to an appropriate position in consideration of the width of the rail, and the curtain rail 12
The fitting member 1 only in the runner groove 13 from the opening.
It is fitted into the first fitting portion 11a. Next, vice handle 10
Is rotated to slide the moving vise 8 in the fixed vise direction to fix the curtain rail 12 to the fixed vise 7.

Next, when the circular saw blade 1 which is rotated by the motor is pushed down in the forward direction, the storage lever 20 of the safety cover 17 first hits the curtain rail 12, and when further pushed down, the safety cover 17 moves in the opposite storage direction. It is housed in the protective cover 2a with a spring action. When the circular saw blade 1 hits the depth upper edge of the curtain rail 12 to start cutting,
The circular saw blade 1 gradually pushes downward and cuts,
As a result of the storage lever 20 still holding the curtain rail 12 in contact with the same position, the safety cover 17 is relatively stored further and is angled from the vicinity of the cutting position by about 27 mm.
While the entire 0 degree circular saw blade 1 is always covered safely,
The cutting will proceed. In addition, the cutting is reliable because the fixing is performed because the fitting member 11 is fitted into the runner groove 13 of the curtain rail 12 and thus the entire rail is stabilized in shape. Even if the circular saw blade 1 is pushed down toward the front side to cut, the cutting position of the object to be cut is stable, and it is cut cleanly and quickly.

FIG. 2 is a side view of a circular saw blade 1 suitable for the curtain rail cutter according to this embodiment, and FIG. 3 is a blade portion 21 of the circular saw blade 1.
It is a partially expanded side view of FIG.

The circular saw blade 1 is a circular saw blade having a cutting edge 22 of a super steel chip as shown in the drawing, but each of the blade portions 21 has a tip end portion that is tapered toward both side surfaces in a front shape. Blade 21
It is composed of two types of blades, a and a second blade 21b that is anti-tapered on both side surfaces, and the blades are alternately provided around. In addition, with each blade, the rake face 23 is slightly inclined,
In addition, the land 24 having a clearance angle is slightly raised at the heel portion 25. 4 and 5 show front views of the blade portions 21.

Therefore, the tip of the blade is tapered, and the object to be cut is first charged from both ends of the blade by the first blade 21a, then cut by the second blade in the middle region of the blade, and again at both ends of the first blade. Since the cutting is performed at 1, the cutting by one blade alone is excluded, so that cutting in an excessively difficult state can be avoided. In addition, since each blade has the land 24 having a clearance angle in the heel portion 25, the shape of the land is slightly raised, so that the cutting biting is further restricted. However, on the other hand, since the cutting action must be ensured, the rake face 23 of each blade is slightly inclined.

The invention is not limited to the above embodiment.
Further, the cutter and circular saw blade of the present invention are particularly suitable for C type rails, square rails, etc., but also applicable to all other types of rails such as round rails.

[Advantages of the Invention] As described above, the present invention is the first to provide a circular saw-type cutter suitable for a curtain rail, which is easy to handle, has a clean cut surface, and can be quickly cut.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the curtain rail cutter according to the present invention, FIG. 2 is a side view of a circular saw blade, FIG. 3 is an enlarged view of the relevant parts, FIG. 4 and FIG. 1 is an enlarged front view of a main part of the first blade and the second blade, and FIG. 6 is a perspective view of the fitting member. 1 ... Circular saw blade, 2 ... Guard body 3 ... Base, 6 ... Blade receiving hole 7 ... Fixed vise, 8 ... Moving vise 11 ... Fitting member, 14 ... Guide hole 17 ... Safety cover 20, storage lever 21a ... first blade, 21b second blade 22 ... cutting edge, 23 ... rake face

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-56-157917 (JP, A) real-open Sho-56-72648 (JP, U) real-open Sho-62-198060 (JP, U) real-open Sho-63- 83215 (JP, U) Actual Open Sho 53-90296 (JP, U) Actual Open Sho 60-84210 (JP, U) Actual Open Sho 52-138486 (JP, U) Actual Open Sho 46-25259 (JP, U) Actual public Sho-46-3430 (JP, Y1) Actual public Sho-17-4179 (JP, Y1) Actual public Sho-46-25259 (JP, Y1)

Claims (4)

[Scope of utility model registration request] 1. A guard main body to which a circular saw blade is attached has one end rotatably supported on a base, and an elongated blade receiving hole into which the circular saw blade penetrates is bored in the base. In addition, a fixed vise and a moving vise for sandwiching the curtain rail are provided in a direction intersecting with the blade receiving hole, and between the fixed vise and the moving vise, a fitting member that is fitted into the runner groove of the curtain rail from the opening is provided. The mounting, the circular saw blade is a circular saw blade having a cutting edge of a super steel chip, and at least the first edge of the blade tip is tapered toward both side surfaces in a front shape,
A second blade having an anti-taper shape is alternately provided on both side surfaces, and the rake face of each blade is slightly inclined, and the land having a clearance angle is slightly raised in the heel portion. Curtain rail cutter characterized by that. 2. The curtain rail cutter according to claim 1, wherein a guide hole for the fitting member is provided between the fixed vise and the movable vise in parallel with the blade receiving hole. 3. The curtain rail cutter according to claim 1 or 2, wherein the movable vise is provided with an inverted T-shaped portion which is engaged with the rear side of the base through the guide hole. 4. A guard body that covers about a half circle of a circular saw blade, and a safety cover that covers about a quarter circle and is housed in the guard body is elastically rotatable in the anti-storage direction. The curtain rail cutter according to claim 1, 2 or 3, wherein the safety cover has a storage lever attached to an open end of the safety cover, the storage lever being provided at an upper front edge of the curtain rail fixed to the vise. .