JP2004347000A - Leaf spring, auxiliary lock for aluminum sash using the leaf spring, and hook fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem with conventional various types of thin plate springs of approx. 20 to 50 mm in length used for an auxiliary lock of 2 to 4 mm in thickness capable of opening/closing an aluminum sash door without any trouble wherein there is no leaf spring capable of maintaining a stable resilient force without lowering a spring force even if used for a long period. <P>SOLUTION: In this leaf spring 1, two rectangular cutouts 2a and 2b are formed in a plate-like spring material, and the inner spring part 4 of three spring parts 3a, 3b, and 4 formed on both sides of the cutouts 2a and 2b is formed shorter than two outer spring parts 3a and 3b positioned on the outer side. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a leaf spring, an auxiliary lock for an aluminum sash using the same, and a fastener. More specifically, the present invention relates to a leaf spring in which the lengths of springs inside three spring portions formed by providing cuts in two windows along one direction of a spring material are reduced, and the use thereof.
[0002]
[Prior art]
Conventionally, there is a product that has a spring action in which a thin steel plate is pressed and formed into an appropriate shape by pressing a thin steel plate, which is called a thin plate spring. (Non-Patent Document 1). A leaf spring used for a slide switch for power supply and connection of home electric appliances and small electric appliances and the like is also a product peculiar to a maker, a model number and the like, and is often designed and manufactured by order.
[0003]
The present inventors have previously filed an application for an auxiliary lock for an aluminum sash using a leaf spring (Patent Document 1). The leaf spring used therein is provided with cuts in two windows in parallel, and of the three springs formed with the cuts therebetween, the length of the spring located inside is extended. A leaf spring longer than the two outer spring portions is used. It is also known to use a spring for the auxiliary lock (Patent Document 2).
[0004]
[Non-patent document 1]
Edited and published by Toyo Keizai Shimbun, "New Edition Product Dictionary," June 25, 1976, p172
[Patent Document 1]
Japanese Patent Application No. 2003-022596 [Patent Document 2]
JP-A-9-137655
However, in the case of the above-mentioned thin plate springs, the spring force is generally weak because the thin plate material is used, and the spring force is often reduced with the use period. In addition, the spring force is reduced, and poor contact is likely to occur.
[0006]
Further, the leaf spring for the auxiliary lock is desired to have the same spring force even when used for 10 to 20 years and to exhibit a stable spring force. The spring part is extended to be longer than the outer spring part.However, a strong spring force cannot be obtained because the part is stretched and thin, and the delicate balance of the spring force of the thin part due to stretching. And the stability of the spring force is lacking. Further, in order to equalize the thickness of the stretched portion during processing as much as possible so as not to reduce the strength of the spring force, it takes time and effort to process, and there is a problem in that the apparatus and the manufacturing cost increase.
[0007]
[Problems to be solved by the invention]
The present invention solves the above-mentioned problems, and has a strong spring force and constantly exerts a stable spring force by contacting a predetermined portion, and is stable without a decrease in the spring force even when used for many years. An object of the present invention is to provide a leaf spring capable of obtaining a spring force, an auxiliary lock for an aluminum sash using the leaf spring, and a fastener.
[0008]
[Means for Solving the Problems]
According to the present invention, (1) two rectangular cuts are provided in parallel in a plate-shaped spring material, and among the three spring portions formed sandwiching each of the two rectangular cuts, And (2) a plurality of outer spring portions located along the longitudinal direction of the inner spring portion. (3) The leaf spring according to (1) or (2), wherein the shape of the plate-like spring material is square or rectangular, and (4) the leaf spring according to (1). (1) An auxiliary lock for an aluminum sash characterized by using the leaf spring described in any one of (1) to (3), and (5) Use of the leaf spring described in any one of (1) to (3) above. The gist of the present invention is characterized by:
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail based on examples.
FIG. 1 is a perspective view showing one embodiment of a leaf spring 1 of the present invention obtained by using a stainless steel plate for a spring as a spring material. Two rectangular cuts 2a, 2b are provided in parallel along the direction, and three spring portions are formed with each of the two cuts 2a, 2b interposed therebetween. The spring portion is composed of outer spring portions 3a and 3b and a middle spring portion 4. The middle spring portion 4 has three recesses formed by press molding to bend the entire length in the transverse direction along the longitudinal direction. By forming 5, the leaf spring 1 formed shorter than the outer spring portions 3a and 3b can be obtained.
[0010]
FIG. 2 shows a perspective view when the leaf spring 1 of FIG. 1 is used for raising and lowering the undulating plate 12 of the auxiliary lock 10 for an aluminum sash, and the undulating plate 12 is erected to be used. FIG. 3 is an exploded perspective view showing the internal structure of the vehicle with the undulating plate 12 of FIG. 2 removed.
[0011]
As shown in FIG. 3, the leaf spring 1 is attached to the substrate 11 at the attachment portion 6 by screwing, riveting, or welding. The undulating plate 12 and the substrate 11 are connected to each other with a support member 14 attached to the back surface of the undulating plate 12 and hooks 19a and 19b provided on the substrate 11 so as to move freely by a tilt stopper 13. , 19b. The tilting stopper 13 is formed so as to operate with a prescribed height.
[0012]
In order to be used as shown in FIG. 3 to FIG. 2, the undulating plate 12 of FIG. The tip 7 is brought into contact with the undulating plate 12. In this state, the undulating plate 12 is housed in the substrate 11, and the support shaft 16 is inserted through four shaft stopper holes 17 provided in the substrate 11 and the undulating plate 12 to attach both members. In order to make the undulating plate 12 undulate, the pressing portion 8 on the undulating plate 12 is pushed in the undulating direction to be raised. Further, when the undulating side of the undulating plate 12 is pressed, the undulating plate 12 falls down and is stored in the substrate 11.
[0013]
The behavior of the leaf spring 1 when the undulating plate 12 undulates is as follows: the tip 7 of the leaf spring 1 is inserted between the insertion portion 15 of the support member 14 and the undulating plate 12, and the undulating plate is stored in the substrate 11. When connected by the support shaft 16, the distal end portion 8 of the leaf spring 1 faces downward and abuts on the insertion portion 15. When the pressing portion 8 of the undulating plate 12 is pressed with a fingertip to erect the undulating plate 12, the outer spring portions 2a and 2b of the leaf spring 1 are pushed by the undulating plate 11, and the distal end portion 7 of the leaf spring 1 warps upward. In this state, the undulating plate 1 is pushed up by the contact with the undulating plate 11 to undulate.
[0014]
As shown in FIG. 3, the lower surface of the outer spring portions 4a and 4b is placed on the substrate 11 to which the leaf spring 1 is attached so that the spring force is strong and surely acts when the leaf spring 1 is used. It is preferable to provide two spring support portions 9a and 9b. The supporting portions 9a and 9b are preferably provided at positions substantially in contact with the centers of the outer spring portions 3a and 3b. The member may be fixed by welding or screwing. The supporting portions 9a and 9b serve as fulcrums to act to push up the outer spring portions 3a and 3b, so that a spring plate having a strong repulsive force can be obtained.
[0015]
In the leaf spring 1 of the present invention, when the undulating plate 12 is raised and lowered, the resilience of the spring is enhanced by the two outer spring portions 3a and 3b, and the two spring support portions 9a and 9b are used as fulcrums. As a result, a strong and stable upward spring force is always obtained, and when used as the leaf spring 1 of the auxiliary lock 10, the closing force of the sash window is strong, and the closed state of the sash window can be reliably maintained. The sash auxiliary lock 10 can be attached to a sash window or the like by attaching a double-sided adhesive tape to the back side of the substrate 11 and attaching it to a sash frame or the like. More reliable strength can be obtained.
[0016]
As a spring material of the leaf spring 1 of the present invention, a stainless steel plate for a spring, such as a stainless steel plate or a ferrite stainless steel plate, a phosphor bronze plate, a steel plate for a spring, or the like is used. A plate, a stainless steel plate for a spring, a brass steel plate or the like is preferable.
[0017]
Examples of the shape of the spring material of the leaf spring 1 of the present invention include rectangular or square quadrangular shapes. In the case of a rectangular shape, the long side is 30 to 100 mm and the short side is 10 to 30 mm. When the object is a square shape, one having a side length of 20 to 80 mm is used, and one having a thickness of 0.3 to 1.5 mm is used. Other shapes include an elliptical shape, a rhombic shape, a long hexagonal shape, and the like, and are formed in the same size as the rectangular shape.
[0018]
The spring material having the above shape is provided with two rectangular cuts 2a and 2b which are located substantially at the center in the longitudinal direction and the transverse direction and are parallel to each other. Then, three spring portions are formed so as to sandwich each of the two cuts 2a and 2b. Of the three spring portions, the outer spring portions 3a and 3b located outside are formed to be longer than the middle spring portion 4 located inside, so that the leaf spring 1 of the present invention is formed.
[0019]
The two rectangular cuts 2a and 2b are provided in order to provide a mounting portion 6 for mounting the leaf spring 1 and a tip portion 7 which is located opposite to the mounting portion 6 and abuts as a spring. It is preferable that a space is provided and the spring material is provided substantially at the center in the longitudinal and transverse directions. It is preferable that the two cuts 2a and 2b have the same size and are provided at equal intervals. When the long side of the spring material, such as a rectangle, is formed in parallel, it is preferable to provide the spring material in parallel along the long side. It is preferable that a space is provided between the tip and the end so as to be located substantially at the center of the shape in the longitudinal and transverse directions.
[0020]
When the spring material is rectangular, the three spring portions are preferably provided with the same width and the same length with the two cuts 2a and 2b interposed therebetween. In such a case, the widths of the outer spring portions 3a and 3b do not become the same, but it is preferable that the upper and lower outer spring portions 3a and 3b are provided so that the widths thereof are equal.
[0021]
The length of the outer spring portions 3a and 3b is made longer than that of the middle spring portion 4 by providing cuts 2a and 2b by press forming of a spring material, and then along the longitudinal direction of the middle spring portion 4 as shown in FIG. This can be achieved by providing a plurality of concave portions 5 formed by bending the entire length in the transverse direction at right angles to the longitudinal direction at regular intervals, and making the middle spring portion 4 shorter than the outer spring portion 3. However, the leaf spring 1 can also be obtained by forming the outer spring portions 3a and 3b to be longer than the middle spring portion 4 by performing the stretching process during the forming process.
[0022]
It is preferable that the concave portion 5 provided at the time of the press forming is provided with approximately two to five concave portions 5 distributed at a predetermined interval from substantially the entire length or the center of the middle spring portion 4 in the longitudinal direction. The leaf spring 1 can also be obtained by providing a triangular concave portion or a semicircular concave portion at regular intervals instead of the concave portion 5 as described above.
[0023]
In the leaf spring 1 in which the outer spring portions 3a and 3b are formed to be longer than the middle spring portion 4, the spring plate 1 obtained by providing the recess portion 5 in the middle spring portion 4 is formed by extending the outer spring portions 3a and 3b. Stable and powerful spring without bias due to no difference in spring force due to a slight difference in elongation generated between the outer spring portions 3a and 3b by stretching compared to the spring plate 1 obtained as described above. It is preferable because a force can be obtained.
[0024]
The leaf spring 1 obtained as described above is preferably subjected to a heat treatment in order to increase the spring force. In some cases, the heat treatment for the spring material need not be performed, but the heat treatment is performed by heating at a temperature of 300 to 500 ° C. for 10 to 30 minutes. In order to prevent oxidation of the surface during heating, it is preferable to perform the heat treatment in the presence of an inert gas such as a nitrogen gas, a helium gas, and an argon gas.
[0025]
FIG. 4 is a perspective view showing another embodiment of the leaf spring 1 of the present invention obtained by using a spring material of a phosphor bronze plate. The leaf spring 1 shown in FIG. 4 is an example obtained by applying a stretching process to both the outer spring portions 3a and 3b and forming the outer spring portions 3a and 3b to be longer than the middle spring portion 4 during the press forming of the spring material. By attaching to the substrate 11 and attaching the support bases 9a and 9b in the same manner as in the embodiment, the auxiliary lock 10 for an aluminum sash can be used.
[0026]
It is desirable that the outer spring portions 3a and 3b obtained by stretching in the above example have the same length and the thickness distribution is also stretched in the same way. In some cases, a balanced and stable spring force cannot be obtained. Therefore, in the press working, it is necessary to work the outer spring portions 3a and 3b under the same conditions with the same pressing pressure.
[0027]
The leaf spring 1 can be provided with an attachment portion 6 for attaching the leaf spring 1 to an end in the direction in which the spring force acts. Further, a screw hole or a rivet hole for attachment may be provided. The mounting portions 6 may be provided at both ends or at one end.
[0028]
The leaf spring 1 obtained as described above has the outer spring portions 3a and 3b and the middle spring portion 4 which is shorter than the outer spring portions and has two fulcrums. Since the spring portion is a spring fulcrum, the spring force is stabilized, so that a leaf spring suitable for applications requiring a certain spring force without fail can be obtained. For example, it is suitable for the leaf spring 1 used for the undulating plate 12 which requires a constant spring force for many months, such as the above-mentioned auxiliary lock for an aluminum sash.
[0029]
The aluminum sash auxiliary lock 10 can also be used as an indoor door stopper. Conventional door stoppers fix the door by hanging a hanging ring attached to the outside of the open door (the side with the wall or window, etc.) near the lower front end of the door, and a hanging alloy tool attached to the floor or wall. ing. The auxiliary lock 10 is mounted on the floor on the indoor side at the lower end on the opening and closing side of the door so that the undulating plate 12 of the auxiliary lock 10 abuts on the door side, and the undulating plate 12 is opened and opened. Can be used to stop the door from closing. It is preferable to attach the auxiliary lock 10 to the floor using a double-sided adhesive tape or the like attached to the back surface of the substrate 11 of the auxiliary lock 10.
[0030]
In the use of the door stopper, a sill may be provided at the lower end of the door, or a gap may be provided between the lower end of the door and the floor surface. It is necessary to keep the standing height high. It is preferred to have a higher height product to accommodate the required height. The door stopper has an advantage that it is not necessary to attach a locking member or the like to the wall side unlike the related art.
[0031]
Next, an example will be described in which the leaf spring 1 of the present invention is used as the leaf spring 1 of a hitting fitting (hereinafter referred to as “hitting”) 20 such as a door. 5 and 6 show examples. FIG. 5 is a perspective view showing a state of use, and FIGS. 6A and 6B are perspective cross-sectional views for explaining the structure of the hook 20 in FIG. FIG. 6A shows a state at the time of locking, and FIG. 6B shows a state at the time of unlocking. At the time of locking, the locking knob 23 is pushed leftward as shown in FIG. 6A, and the unlocking knob 24 projects rightward. At this time, the upper end of the leaf spring 1 is moved inward (leftward) inside the case 21 in conjunction with the locking knob 23 about the shaft bar 26 as an axis, and is in a locked state. At the time of unlocking, the unlocking knob 24 pushes the support plate 25 and further presses the leaf spring 1 to invert the spring to project the locking knob 23 to the outside (to the right) of the case 22. It is pushed into the case 20 and becomes unlocked.
[0032]
The structure of the hook 20 and the behavior of the leaf spring 1 will be described with reference to FIGS. 6 (a) and 6 (b). A circular hole (not shown) having a size such that the axis of the knob 23 can freely move is provided at the tip of the leaf spring 1 on the locking knob 23 side, and the shaft of the knob 23 is inserted into the circular hole. ing. The other end of the leaf spring 1 is fixed to the inner wall of the case 21 by riveting or welding. On the inner wall of the case 21, two spring support portions 29a, 29b (29b are not shown) are provided at positions where the outer spring portions 3a, 3b of the leaf spring 1 are in contact with the substantially central portions in the longitudinal direction. Is provided. The support portions 29a and 29b are provided so as to protrude inward when the case 21 is pressed. Alternatively, the support portions 29a and 29b may be provided by welding a metal piece having a predetermined size.
[0033]
The support plate 25 is mounted in the case 21 by a shaft bar 26 in the vertical direction, and at the tip of the locking knob 23 side, a circular hole having a size through which the shaft of the knob 23 can be freely moved is provided. Twenty-three axes are inserted. The unlocking knob 24 side of the support plate 25 is in contact with the tip of the knob 24, but is not connected to the tip and is in a free state. The support plate 25 may be formed in a single flat plate shape, or may be formed by bending the tip of the unlock knob 24 in accordance with the shape thereof.
[0034]
The shaft of the locking knob 23 is inserted through a hole provided in the support plate 25 and the leaf spring 1 to hold the two members. The C-rings 28a and 28b are fitted into each of the grooves, and the support plate 25 and the leaf spring 1 are sandwiched between the C-rings 28a and 28b. Also, at a predetermined position inside the case of the shaft of the unlocking knob 24, a single groove that makes one rotation around the shaft is provided, and a C-ring 28c is fitted into the groove and attached, and the unlocking knob 24 is removed from the case 21. I try not to fall out.
[0035]
By configuring the hooking member 20 as described above, the leaf spring 1 and the support plate 25 sandwiched between the C-rings 28a and 28b respond to the movement of the knob during locking and unlocking, as shown in FIG. At the time of locking [FIG. 6 (a)], when the locking knob 23 is pushed to the left, the leaf spring 1 works in the locking direction, and the support plate 25 further supports it. When the unlocking knob 24 is pressed at the time of unlocking (FIG. 6B), the locking knob 23 moves rightward, and at the same time, the leaf spring 1 is turned over and unlocked. The support plate 25 functions to push the leaf spring 1 against the spring support portions 29a and 29b to promote the reversal of the repulsive force to quickly advance the movement to locking or unlocking, and to support the leaf spring 1. It functions to securely maintain the locked or unlocked state.
【The invention's effect】
[0036]
According to the present invention, two rectangular cuts are provided in parallel in a plate-shaped spring material, and the three rectangular spring cuts formed on both sides of the two rectangular cuts are located outside. By forming the two outer spring portions to be longer than the inner middle spring portion, a strong spring force is obtained, and by being supported by the two fulcrums of the outer spring portion, An effect is obtained in that a leaf spring having a high repulsive force and a stable spring force is obtained, and a leaf spring whose spring force does not change even when used for many years is obtained.
[0037]
The present invention provides a plurality of concave portions formed by bending the entire length in the short direction at right angles to the longitudinal direction along the longitudinal direction of the middle spring portion located on the inner side, so that the outer spring portion A short middle spring process can be easily and advantageously performed, and the spring force between the two outer spring portions is not biased, so that a stable and strong leaf spring can be obtained.
[0038]
By using the above-mentioned leaf spring for the aluminum sash auxiliary lock and the buckle of the present invention, the resilient force of the strong leaf spring and the stable spring force make the raising and lowering of the undulating plate of the above-mentioned auxiliary lock and the locking of the buckle firm. Thus, there is obtained an effect that it can be used without change for many months and can be used safely for crime prevention.
[Brief description of the drawings]
FIG. 1 is a perspective view showing one embodiment of a leaf spring of the present invention.
FIG. 2 is a perspective view showing an embodiment of an aluminum sash auxiliary lock using the leaf spring of FIG. 1;
3 is an exploded perspective view showing a state in which the leaf spring of FIG. 1 is used in the auxiliary lock for an aluminum sash of FIG. 2;
FIG. 4 is a perspective view showing another embodiment of the leaf spring of the present invention.
FIG. 5 is a perspective view showing a case where the leaf spring of the present invention is used for a hitting fitting.
6 (a) is a perspective sectional view showing the structure of the hitting metal fitting of FIG. 5 after locking.
FIG. 6 (b) is a transparent sectional view showing the structure of the hitting metal fitting of FIG. 5 after unlocking.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Leaf spring 2a, 2b Notch 3a, 3b Outer spring part 4 Middle spring part 5 Recess 10 Auxiliary lock 11 for aluminum sash 11 Substrate 12 Undulating plate 20 Driving fitting 21 Case 1
22 Case 2
23 Locking knob 24 Unlocking knob

Claims (5)

Two rectangular cuts are provided in parallel in a plate-like spring material, and two outer cuts located outside of three spring portions formed by sandwiching each of the two rectangular cuts. A leaf spring characterized in that the length of the spring portion is formed longer than that of the inner spring portion located inside. The leaf spring according to claim 1, wherein a plurality of recesses are provided along a longitudinal direction of the inner spring portion. 3. The leaf spring according to claim 1, wherein the shape of the leaf spring material is rectangular or square. An auxiliary lock for an aluminum sash, wherein the leaf spring according to any one of claims 1 to 3 is used. A hitting fitting using the leaf spring according to claim 1.

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