JP4593093B2 - Pin for mounting on soft board - Google Patents

Description

  The present invention relates to a pin used for attaching various members to a soft board such as a plaster board.

  When attaching various members to a vulnerable board such as a plaster board, a pin-and-nail pin cannot provide a retaining function, so that the pull-out strength can be obtained by opening the leg while driving into the board. It is necessary to use open leg type pins.

  FIG. 15 shows an example of a conventional open leg type pin, which is composed of a combination of a pin body 1 and a washer 2. The pin body 1 is parallel to each other with an interval, and an inclined surface 3 is formed at the tip of the opposing surface. The washer 2 has a structure in which the leg 4 is coupled by the head 5, and the washer 2 is provided with a guide hole 6 through which the two legs 4 can pass.

  In order to attach the mounting partner B to the soft board A with such an open leg type pin, as shown in FIG. 15A, the mounting partner B and the washer 2 are stacked on the soft board A, and the pin is inserted into the guide hole 6 of the washer 2. When the two legs 4 of the body 1 are inserted and the pin body 1 is driven toward the soft board A, the leg 4 is forcibly opened by the guide by the washer 2 and the inclined surface 3 at the tip. As shown in FIG. 15B, the object to be fastened is fixed to the soft board in an open leg state (see, for example, Patent Document 1).

JP-A-9-317728 (first page, FIG. 1, FIG. 15 to FIG. 21)

  By the way, in the case of an open leg type pin in which two legs 4 are parallel in the state of the product and the leg 4 is forcibly opened by driving, both legs are driven into the soft board A. 4, there is a problem that a restoring force is exerted to return to the original parallel state, and the restoring force causes the pin body 1 to move slightly away, and the fixing of the mounting partner B is loosened.

  In addition, when striking the soft board A, the legs 4 are forced to be widened, so that a large force is required for driving the pin body 1.

  Therefore, the object of the present invention is to hold the two needles shaped in the open leg state in advance in the closed leg state and push it into the soft board so that the leg is opened to the original shape in the soft board, Accordingly, it is an object of the present invention to provide a pin for mounting on a soft board that does not cause movement in the direction to come off, does not loosen in fixing the mounting partner, and can be pushed into the soft board with a light force.

In order to solve the above-described problems, the present invention has two sharp needles whose distal ends are opened in a natural state, and the two needles are allowed to pass through the distal ends of the two needles. A pin for attaching to a soft board held in a closed state by a washer, and the above two needles use a single wire with springiness, and the wire is folded in half at the middle and crossed in the middle The two needles are formed in a pin for attachment to a soft board with the bent portion serving as the head and the front end side from the cross portion opened. A head member that covers the head is attached to the head formed by the folded portion of the head, and the head member is attached to the annular portion of the head formed by folding the wire rod by two. Attached to the needle of the book It is obtained by way.

The washer is formed by providing a hole for inserting the sharp ends of two needles in a washer body having a truncated cone shape, and closing the end of the hole with a thin membrane plate.

  The above two needles are held in a closed leg by a washer. In the soft board, it will return to its original open state, and therefore the two needles will not close, so there will be no movement in the direction of withdrawal, and there will be no loosening of the mounting partner. Become.

  The tip end sides of the two needles have an inclined surface with a sharp position in the direction of opening leg or a conical pointed end so that the leg can be easily opened when pushed.

As described above, according to the present invention, the pin for attaching to a soft board in which the tip side of two sharp needles that open on the tip side is held in a closed state by a washer that allows passage of the two needles The two needles are formed in two by folding the single wire in half at the middle and crossing in the middle, and the two needles have the bent portion at the head In the mounting pin to the soft board whose front end side is open from the cross portion, the head member that covers the head is formed on the head formed by the bent portion of the two needles. Since the fitting member is attached to the head member so that the head portion of the pin is press-fitted into the head member, the fitting member engages with the annular portion of the head portion, and the head member is removed from the head portion of the pin. Can be attached to the pin head, so Mounting operation of the head material is to be carried out easily that.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  In the first embodiment shown in FIGS. 1 (A) and 1 (B), the pin 11 for attachment to the soft board is open at the tip side in the natural state, and is restored from the closed leg state to the open leg state. The two needles 12 and 12 having a predetermined length are provided, and the distal ends of the two needles 12 and 12 are formed on an inclined surface 13 that becomes a sharp end 13a with a sharp position in the leg opening direction, The distal ends of the two needles 12 and 12 are held in a closed leg state by a washer 15 having a hole 14 that allows passage of the two needles 12 and 12.

  The two needles 12 and 12 are formed in two by using a single wire having spring properties, folding the wire in half at an intermediate portion and bending it so as to cross in the middle. As shown in FIG. 1 (A), the pin 11 has an annular head 16 formed by the bent portion and a cross-section located at the lower end of the head 16 so that the tip side opens in a C shape. The shape is provided with the needles 12, 12.

  The pin 11 of the second embodiment shown in FIGS. 3A and 3B has two needles 12 and 12 each having a tip portion formed on a sharp end 13a on a head member 17 of another member having a required shape. Is crossed on the head member 17 side, and fixed so that the front end side of the cross part is opened in a letter C shape. The front end side of the two needles 12 and 12 is allowed to pass through the two needles 12 and 12. It is structured to be held in a closed leg state by a washer 15 having a permissible hole.

  As shown in FIG. 3 (A), the two needles 12 and 12 use two independent metal wires having a spring property whose tip side is formed at a sharp end 13, and the two wires are in a natural state. The base end of the head member 17 is fixed to the head member 17 so that the head member 17 is crossed on the head member 17 side and is opened on the distal end side.

  The pins 11 of the third embodiment shown in FIGS. 4A and 4B are respectively arranged at positions in the middle of the two needles 12 and 12 in the pin 11 of the first embodiment described above. Bending portions 31 and 31 that are bent so that the distal ends of the needles 12 and 12 are directed in the leg-opening direction are provided.

  The angle of the bent portions 31 and 31 may be set so that the needles 12 and 12 are arranged in a letter C shape by slightly bending in the leg opening direction. However, it is preferably provided at the position of the cross portion of both needles 12 and 12 as shown in the figure.

  When the bent portions 31 and 31 are provided in the middle of the needles 12 and 12 as in the third embodiment, the rigidity in the bending direction of the needles 12 and 12 is increased, and the legs are in an open leg state inserted into the soft board. In this case, even when a pulling force is applied, the mobility of the needles 12 and 12 in the closing leg direction is lowered, and thereby the pulling-out strength can be improved.

  Of course, the bent portions 31 and 31 of the needles 12 and 12 shown in the third embodiment can also be adopted for the pin 11 of the second embodiment shown in FIG.

  The pin 11 of the fourth embodiment shown in FIGS. 5A and 5B is the head formed by the bent portions of the two needles 12 and 12 in the pin 11 of the third embodiment described above. A separate head member 21 that covers the head 16 is attached to the portion 16 in an external fitting shape, and the pin 11 of the fifth embodiment shown in FIGS. In the pin 11 of the first embodiment described above, the head member 21 having a structure different from that of the fourth embodiment is attached to the head 16 formed by the bent portions of the two needles 12 and 12. It is attached in a fitting shape.

  First, the head member 21 shown in the fifth embodiment of FIGS. 11A and 11B uses a metal or a synthetic resin, and a pair of head members 22 and 22 divided into two as shown in FIG. It is a cylindrical shape in which one end is closed in the combined state, the head 16 is stored in the internal space, and the pin 23 provided on the single head member 22 is an annular portion formed by the head 16. By inserting the pin 23 into the hole provided in the other head member 22, the both head members 22 and 22 are combined in a combined state, and the head 23 is connected to the two needles 12 by the pin 23. 12, the opening end of the head member 21 is formed in an enlarged portion 24 having an inner diameter in which the washer 15 is accommodated.

  Next, the head member 21 shown in the fourth embodiment has an integrated structure using a synthetic resin as shown in FIGS. 5 to 7, and has a large diameter flange 32 on the outer periphery on the upper end side. A storage hole 33 having an inner diameter that is formed in a circular shaft shape and that accommodates the washer 15 is provided at the lower end.

  The head member 21 includes a head insertion groove 34 having an elliptical cross section that opens at the center of the inner end of the storage hole 33, and a pair having a similar elliptical cross section and positioned parallel to both sides of the head insertion groove 34. And a pair of arcuate protrusions 36 are provided on the inner surfaces of the opposite sides of the head insertion groove 34.

  When a pair of escape grooves 35, 35 are arranged close to both sides of the head insertion groove 34, both sides of the head insertion groove 34 become thin walls 37, and both sides of the head insertion groove 34 are caused by the presence of the walls 37. It will have the elasticity of synthetic resin.

  Therefore, when the head portion 16 of the pin 11 is press-fitted into the head insertion groove 34, the wire forming the head portion 16 passes between the arc-shaped protrusions 36 and 36 by the elasticity of the walls 37 on both sides, and passes through this passage. Later, when both side walls 37 are restored, both arcuate protrusions 36 and 36 engage with the annular hole in the head 16, and the head member 21 is prevented from being detached from the head 16 of the pin 11 as shown in FIG. 5. It is possible to attach the head member 21 to the head 16 of the pin 11 easily.

  FIG. 8 and FIG. 9 show another example of the head member 21 shown in the fourth embodiment. One side of the inner surfaces of both sides of the head insertion groove 34 facing each other is made flat, and the head is placed on the other side. The sixteen locking projections 51 are provided so as to protrude with a gap allowing the elastic passage of the wire forming the head 16 between the one surface side.

  The locking projection 51 is vertically long under the condition that the inner space of the head 16 is fitted, and has an inclined surface 52 that facilitates insertion of the head 16 at the lower portion, and the engagement of the head 16 at the upper end. When the head portion 16 of the pin 11 is press-fitted into the head insertion groove 34, the wire forming the head portion 16 is formed on the one side of the locking projection 51 with the elasticity of the walls 37 on both sides. After the passage, the walls 37 on both sides are restored, so that the locking projections 51 are fitted into the annular holes in the head 16, and the locking step portion 53 as shown in FIG. As a result, the head member 21 can be attached to the head 16 of the pin 11 in a retaining state.

  In the first and second embodiments, the holding of the needles 12 and 12 in the closed state by the washer 15 is illustrated with the sharp end 13a protruding slightly from the washer 15. However, the sharp end 13a is shown in FIG. As shown in FIG. 14 (A), the tips of the two needles 12 and 12 may be cut at a slanted shape to form a sharp end 13a. As shown in B), it may be conical and have a sharp end 13a.

  In the third embodiment shown in FIG. 4, an example of the washer 15 that can be made in a state in which the sharp end 13 a does not protrude at all is shown.

  The washer 15 has a flange 39 around the large-diameter end of the washer body 38 having a truncated cone shape. The washer body 38 is provided with a hole 40 that opens at the large-diameter end. The end portion of the hole 40 is closed with a thin film plate 41 that can be broken by the sharp end 13a.

  In this way, when the end of the hole 40 is closed with the membrane plate 41, the sharp end 13a inserted into the hole 40 stays inside the washer 15, and the sharp end 13a is not exposed, so that it is safe and the membrane plate 41 is present. Therefore, it is possible to prevent the washer 15 from moving to the upper part of the needles 12 and 12 due to the opening force of the needles 12 and 12.

  Further, since the washer body 38 is formed in the shape of a truncated cone, it can be easily inserted into the mounting hole 18 of the mounting partner B as shown in FIG.

  The pin of the present invention is configured as described above. Next, a method of using this pin will be described.

  FIG. 2 shows an example of attachment using the pin 11 of the first embodiment shown in FIG. 1, and a mounting partner B is stacked on the soft board A, and the mounting partner B is placed on the mounting partner B as shown in FIG. The pin 11 holding the two needles 12 and 12 in the closed state with the washer 15 is faced to the portion of the mounting hole 18 previously drilled, and the washer 15 is overlapped with the mounting partner B at the portion of the mounting hole 18. In this state, the needles 12 and 12 of the pin 11 are pushed toward the soft board A.

  The needles 12 and 12 of the pin 11 pushed toward the soft board A pass through the hole 14 of the washer 15 so that the closed leg state is released, and the needles 12 and 12 are shaped in the open leg state. Therefore, when the head 16 enters the soft board A, it will open with its own restoring elasticity, and when the head 16 becomes unable to enter the washer 15, as shown in FIG. In such a state that the pin 11 is completely pushed in, the needles 12 and 12 are opened in the soft board A, and the mounting partner B is fixed to the soft board A.

  When the pin 11 is pushed into the soft board A, the needles 12 and 12 are opened by their own restoring elasticity and can be pushed in with a lighter force than when the legs are forcibly opened.

  In addition, since the two needles 12 and 12 are in a state in which the shape of the open leg is formed, the original leg is opened in the soft board A. For this reason, the two needles 12 and 12 are closed by the closed leg. There is no occurrence of movement in the direction of detachment due to, and there is no looseness in fixing the mounting partner B.

  The pin 11 of the second embodiment shown in FIG. 3 and the pin 11 of the third embodiment shown in FIG. 4 are also soft by the same operation as the pin of the first embodiment described above. The mounting partner B can be fixed to the board A. In the case of the pin 11 of the second embodiment, the mounting partner B is fixed to the soft board A with the head member 17 fully pressed against the washer 15. Can be fixed.

  Further, the pin 11 of the fourth embodiment shown in FIG. 5 is as shown in FIG. 10, and the pin 11 of the fifth embodiment shown in FIG. 11 is as shown in FIG. The mounting partner B can be fixed to the soft board A by the same operation as the pin 11 of the first embodiment, and the head member 21 is attached to the washer 15 as shown in FIGS. 10 (B) and 12 (B). The fitting partner B can be fixed to the soft board A in the fitted state.

  As described above, the pin 11 provided with the head member 17 according to the second embodiment and the head member 21 according to the fourth and fifth embodiments not only has a good finish to the fixing of the mounting partner B. There is an advantage that the pushing operation with the fingertip can be performed smoothly.

  In addition, as in the case of the pin 11 of the third embodiment shown in FIG. 4 and the fourth embodiment shown in FIG. The rigidity of the needles 12 and 12 in the bending direction is increased by the portions 31 and 31, and the mobility of the needles 12 and 12 in the closed leg direction is reduced even when a pulling force is applied in the open leg state inserted into the soft board A. As a result, the pull-out strength of the pin 11 can be further improved.

(A) is a front view in the natural state showing the pin of the first embodiment, (B) is a front view in which the needle in the same pin is closed with a washer. (A) is a longitudinal front view showing the mounting partner before fixing using the pins of the first embodiment, and (B) is a longitudinal front view showing the fixing state of the mounting counterpart. (A) is a front view in the natural state showing the pin of the second embodiment, (B) is a front view in which the needle of the pin in the above is closed with a washer. (A) is a front view in the natural state showing the pin of the third embodiment, (B) is a front view in which the needle in the pin of the same is closed with a washer. (A) is a vertical front view of a natural state showing the pin of the fourth embodiment, (B) is a vertical side view of the same as above. (A) is the enlarged front view of the head member used for the pin of 4th Embodiment, (B) is the side view (A) is the expanded longitudinal cross-sectional view of the head member used for the pin of 4th Embodiment, (B) is the cross-sectional top view which follows the arrow bb line of (A). (A) is a vertical front view of a natural state in which the head member of another example is attached to the pin of the fourth embodiment, and (B) is a vertical side view of the same as above. (A) is an enlarged longitudinal sectional front view of another example head member used for the pin of the fourth embodiment, (B) is a cross-sectional plan view along the line bb of (A), (C) is Same vertical side view (A) is a longitudinal front view showing the mounting partner before fixing using the pins of the fourth embodiment, and (B) is a longitudinal front view showing the fixing state of the mounting counterpart. (A) is a vertical front view of a natural state showing the pin of the fifth embodiment, (B) is a vertical side view of the same as above. (A) is a longitudinal front view showing the mounting partner before fixing using the pins of the fifth embodiment, and (B) is a longitudinal front view showing the fixing state of the mounting counterpart. The disassembled perspective view of the pin of 5th Embodiment and the head member used for this (A) is a perspective view of the sharp end of the needle, (B) is a perspective view showing another example of the sharp end of the needle. (A) is a longitudinal front view before fixing the mounting partner showing a conventional pin, and (B) is a longitudinal front view showing the fixing state of the mounting partner.

Explanation of symbols

11 Pin 12 Needle 13 Inclined surface 13a Sharp end 14 Hole 15 Washer 16 Head 17 Head member 18 Mounting hole 21 Head member 23 Pin 31 Bending part 32 Large diameter flange 33 Storage hole 34 Head insertion groove 35 Relief groove 36 Arc-shaped protrusion 38 Washer body 39 鍔 40 Hole 41 Membrane plate 51 Locking projection 52 Inclined surface 53 Locking step A Soft board B Mounting partner

Claims (2)

Have a sharp two needle tip side is open leg (12) in a natural state, the distal end side of the two needles (12), washers that allows the passage of two needles (12) (15) in a mounting pin of the soft board held in閉脚state, the two needles (12), using a single wire rod having a spring property, in the middle and the wire folded into two at the middle portion The two needles (12) are formed by bending so as to cross, and the pin (12) is a pin for mounting on a soft board with the bent portion serving as the head (16) and the distal end side extending from the cross portion. In
A head member (21) covering the head (16) is attached to the head (16) formed by the bent portion of the two needles (12), and the head member (21) Attachment to a soft board characterized by being attached to the two needles (12) in a retaining manner by a fitting member for the annular part of the head (16) formed by folding the wire rod in half Pins. The washer is claim 1 the hole for inserting the sharp end of the two needles in the washer body to be frustoconical provided, characterized in that it is formed by closing the ends of the holes in the thin film plate Pin for mounting on the soft board as described in 1.

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