JPH0332226Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is mainly used in multi-stage tool cabinets, and when any extraction is opened, extractions other than the one opened are automatically locked, and multiple extractions are opened at the same time. This invention relates to a free-lock device capable of sequentially closing extraction for one piece even in the case of a free-lock device, which can smoothly move up and down a lock bar for controlling the lock bar, and can reliably maintain the raised state.

In general, this type of free-lock device prevents the cabinet from tipping over due to the weight of the items inside the extractor if all or several extractors are accidentally opened to remove the items inside the extractor. Therefore, when any extractor is opened, all extractors other than the one opened are locked, and after one extractor is opened, the next extractor cannot be opened unless the opened extractor is closed. However, there is a problem in that the extractor cannot be opened and closed smoothly unless the lock bar that controls it moves up and down smoothly.

However, in order to solve the above-mentioned problems, the present invention has _a lock bar 3 in which stopper pins _{3 1} . A control member 5 is attached to the side plate ₄₁ of each extractor ₄ so as to be slidable and has a downward taper ₅₁ , a rising taper ₅₂ , ₅₃ , and a vertical surface ₅₄ of the stopper pin 31. In the free lock device, two legs 6 ₁ ,
A holding member 6 made of synthetic resin and biased by a spring 6 ₂ so that the leg pieces expand from side _to side.
At the same time, when the lock bar 3 is lowered, both sides of the lock bar 3 above the protrusions 6 ₃ , 6 ₃ formed on the legs of the holding member 6 are recessed inward to form the engaging parts 3 ₂ , It is characterized by a structure formed by forming 3 ₂ .

Note that the holding member 6 may be attached to the guide rail 2 by the shaft ₆₄ with the upper ends of the two leg pieces 6 ₁ and 6 ₁ intersecting each other as in this embodiment;
₁ and 6 ₁ may be formed into a bifurcated shape by integrating the upper end portions thereof. Further, when the extractor 4 is closed, the ascending taper 5 ₂ of the control member 5 is made long so that the stopper pin 3 ₁ always comes into contact with it.

Next, the operation and effects of the present device will be explained with respect to the illustrated embodiment according to the above configuration of the present invention.

That is, when one extractor 4 is opened from a state in which all extractors are closed (not shown), the rising taper 5 ₂ of the control member 5 pushes up the stopper pin 3 ₁ during the opening process. The lock bar 3 is pushed up, but at this time, the engaging parts 3 ₂ , 3 _{2 push the upper sides of the protrusions 6 3 , 6 3 of the} holding member 6 inward, causing the legs 6 ₁ , 6 ₁ to resist the spring 6 ₂ . Since the lock bar 3 tries to be compressed and compressed, resistance is applied to the rise of the lock bar 3 by this amount of force, but the lock bar 3 continues to be compressed and rises. In this raised position, the lock bar 3 cannot be lowered by its own weight because the engaging parts 3 ₂ and 3 ₂ are in contact with the lower parts of the protrusions 6 ₃ and 6 ₃ of the holding member 6, and resistance is applied. without being held in the raised position. That is, _the stopper pins 3 ₁ ... 3 ₁ are in the raised position, and even if an attempt is made to open another extractor ₄ . I can't.

When the opened extractor 4 is closed, the stopper pin ₃₁ is pushed down by the action of the descending taper ₅₁ of the control member 5, and the legs ₆₁ , The lock bar 3 descends while compressing 6 ₁ , returning to the closed extraction state shown in Figure 1.

It is also possible to open a plurality of extractors at the same time through the operation of the lock pin described above, and the operation of closing the plurality of open extractors will be explained.

That is, when one of the open extractors is closed, the lock bar 3 and the stopper pin ₃₁ are in the lowered state as described above, but when one of the remaining open extractors is pushed in the closing direction, the control member The stopper pin ₃₁ is moved by the action of the rising tapered part ₅₃ of 5.
is once pushed up as described above, and then pushed down and closed by the action of the descending taper ₅₁ , and the remaining open extractors are closed one by one by repeating this operation.

As described above, according to the lock bar holding device of the present invention, a holding member made of synthetic resin is attached to the guide rail into which the lock bar is inserted, and the holding member is made of synthetic resin and has legs that are constantly expanding outward. Since both sides of the lock bar are recessed inward to form symmetrical protrusions, both sides of the lock bar move up and down with equal resistance and maintain this state reliably even in the raised position. The lock bar can move up and down very smoothly, and does not wobble even after long-term use, further increasing the effectiveness of the free-lock device. Unlike the gourd-shaped holding member made of soft synthetic resin proposed by others, which applies resistance to the lock bar through its elastic deformation, it uses the restoring force of a spring to actively apply resistance. Because of this, unlike the gourd-shaped holding member described above, it does not become fatigued due to long-term use and the holding of the lock bar weakens, and it has excellent durability and usability. In the case of the holding member, the separate legs are pivoted and integrated at the upper end, but it may be formed into a bifurcated shape by integral molding from the beginning during the manufacturing process. The elasticity of the integral molding and the restoring force of the spring can further enhance the effect of spreading the legs.

Furthermore, since the stopper pin is configured to contact the ascending taper of the control member from the beginning when the extractor is in the closed state, the contact noise between the taper and the stopper pin that was generated when the extractor is pulled out is eliminated. There is no damage to the taper, and durability is also improved.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the present invention, and FIG. 1 is a front view of the main part of a free-lock device equipped with the present invention, and FIG. 2 is a side view of the main part. 1... Cabinet body, 2... Guide rail, 3... Lock bar, 3 ₁ ... Stopper pin,
4... Extraction, 5... Control member, 6... Holding member.

Claims (1)

[Scope of utility model registration request] A lock bar 3 with stopper pins 3 ₁ ... 3 ₁ implanted in multiple stages is vertically slidably inserted into the guide rail ₂ formed on the side plate reinforcing plate 1 1 in the cabinet body 1, and the side plate 4 ₁ of each extractor 4 is inserted. In the extraction free lock device, a control member 5 is attached to the stopper pin ₃₁ with a descending taper 5 ₁ , an ascending taper 5 ₂ , 5 ₃ and a vertical surface 5 ₄ , in the guide rail 2 . two legs 6 ₁ ,
A holding member 6 made of synthetic resin and biased by a spring 6 ₂ so that the leg pieces expand from side _to side.
At the same time, when the lock bar 3 is lowered, both sides of the lock bar 3 above the protrusions 6 ₃ , 6 ₃ formed on the legs of the holding member 6 are recessed inward to form the engaging parts 3 ₂ , 3. A lock bar holding device in an extraction free lock device formed by ₂ .