Spring-type insert and resin component

Abstract

This spring-type insert allows for extremely easy removal of the resin portion on the underside of the deck plate, and also enables the use of a long type, which is suitable for attaching anti-vibration devices, sensors, etc. [Solution] A spring 2 is attached to the head side of a bolt-type insert 1. A resin part 3 is attached to the threaded side. The spring 2 holds the insert 1 upright on the upper surface of the deck plate P. The resin part 3 secures the insert 1 on the lower surface of the deck plate P. The outer shape of the lower part of the resin part 3 is formed into a hexagonal shape. The resin part 3 is designed to be removed using a tool used for nuts.

Description

Technical Field

[0001] The present invention relates to a spring-type insert having no protruding resin portion from the lower surface of a deck plate, and particularly relates to a spring-type insert and a resin member suitable for directly attaching a seismic-resistant frame to the lower surface of a deck plate.

Background Art

[0002] Conventionally, to attach a bolt-type insert for suspending a structure to a deck plate or the like, first, a through-hole is drilled in the deck plate. Next, a bolt-type insert is inserted into the through-hole from above and attached.

[0003] This insert has a fixing resin portion mounted on the threaded side, and the insert is driven and fixed until the resin portion penetrates the deck plate. A spring is mounted on the head side of the insert, the insert is erected on the upper surface of the deck plate, and the resin portion fixes the insert on the lower surface of the deck plate.

[0004] In such an insert, since the resin portion protrudes from the lower surface of the deck plate, when a seismic-resistant frame is attached to the lower surface of the deck plate, the resin portion protruding from the lower surface interferes with the attachment and cannot be fixed directly. Accordingly, a bolt-type insert (anchor bolt) having no protruding resin portion on the lower surface of the deck has been proposed (Patent Document 1).

[0005] This anchor bolt is configured such that after concrete placement, the resin protruding from the lower surface of the deck plate can be removed from the anchor bolt.

Prior Art Literature

Patent Literature

[0006]

Patent Literature 1

Summary of the Invention

[0007] However, with the anchor bolt described in Patent Document 1, removing the resin part that protrudes from the bottom of the deck plate requires pinching the protruding resin with a tool or fingers and rotating it to remove it. When installing a large number of anchor bolts, removing the resin part one by one becomes extremely time-consuming and laborious.

[0008] If these anchor bolts were to be changed to a longer type, removing the resin part from the threaded portion of the anchor bolt that protrudes from the bottom of the deck plate would require an extremely large amount of effort and time.

[0009] Thus, with conventional bolt-type inserts, removing the resin part that protrudes from the bottom of the deck plate required a lot of effort and time.

[0010] Therefore, the present invention was created to solve the above-mentioned problems, and aims to provide a spring-type insert and resin member that can easily remove the resin part protruding from the lower surface of the deck plate. [Means for solving the problem]

[0011] To achieve the above objective, the first means in the present invention is a spring-type insert in which a spring 2 is attached to the head side of a bolt-type insert 1 and a resin part 3 is attached to the threaded side, the spring 2 raises the insert 1 on the upper surface of the deck plate P and the resin part 3 fixes the insert 1 on the lower surface of the deck plate P, wherein the outer shape of the lower side of the resin part 3 is formed into a hexagonal shape and the resin part 3 is configured to be removed with a rotary tool.

[0012] The resin part 3 of the second means is formed by molding the resin part 3 and simultaneously forming screw threads inside the resin part 3.

[0013] The thread of the third means consists of a plurality of thread-shaped projections 4 screwed onto the insert 1.

[0014] The insert 1 of the fourth means uses the long-type insert 1.

[0015] The insert 1 of the fifth means uses the half-threaded insert 1.

[0016] The sixth means is a resin member having a through hole for inserting a male screw, the resin member comprising a plurality of projections spirally arranged at intervals on an inner wall of the through hole and engaging between threads of the male screw. [Advantageous Effects of the Invention]

[0017] According to the present invention, the resin portion protruding from the lower surface of the deck plate can be removed extremely easily. [Brief Description of the Drawings]

[0018] [Figure 1] It is a perspective view showing an attached state of the insert according to the present invention. [Figure 2] It is a perspective view showing a state where a resin portion is attached to the insert according to the present invention. [Figure 3] It is a cross-sectional view of a principal part showing the projection-shaped thread formed inside the resin portion of the present invention. [Figure 4] It is a plan view showing the resin portion of the present invention. [Figure 5] It is a bottom view showing the resin portion of the present invention. [Figure 6] It is a longitudinal sectional view showing the resin portion of the present invention. [Figure 7] It is an enlarged cross-sectional view of a principal part of the projection-shaped thread of the present invention. [Figure 8] (a) to (d) are front views showing a procedure for attaching the insert of the present invention. [Figure 9] It is a perspective view showing the long-type insert of the present invention. MODE FOR CARRYING OUT THE INVENTION

[0019] The present invention relates to a spring-type insert used when installing, for example, a seismic-resistant frame such as an anti-sway brace or a sensor. The main configuration of the insert of the present invention comprises an insert 1, a spring 2, and a resin portion 3 (see FIG. 1).

[0020] The insert 1 is a bolt-type insert 1. A coiled spring 2 is mounted on the head side of the insert 1, and the resin portion 3 is mounted on the screw portion side thereof (see FIG. 1). The spring 2 erects the insert 1 on the upper surface of a deck plate P via a washer 5, and the resin portion 3 fixes the insert 1 on the lower surface of the deck plate P (see FIG. 8(B)).

[0021] The resin portion 3 is a member that abuts against the lower surface of the deck plate P, and is screwed onto the screw portion of the insert 1. To screw the resin portion 3 onto the insert 1, the screw portion side of the insert 1 is inserted into the resin portion 3, and the resin portion 3 is rotated to achieve screwing (see FIG. 2).

[0022] The illustrated resin portion 3 is configured such that the outer shape of the lower side is shaped like a hexagonal nut, and the resin portion 3 can be detached using various rotation tools for nuts (see FIG. 5). That is, a grip portion 3A having a hexagonal lower side is provided on the resin portion 3. Furthermore, a plurality of substantially petal-shaped fixing pieces 3B are formed on the upper side of the grip portion 3A (see FIG. 4). The grip portion 3A has a thread formed on the inner side thereof, and the fixing pieces 3B radially expand from the upper end side of the grip portion 3A (see FIG. 3).

[0023] For the resin portion 3 of the present invention, the thread is formed inside the resin portion 3 at the same time when the resin portion 3 is molded. The illustrated thread is a plurality of thread-like protrusions 4 screwed onto the insert 1 (see FIG. 3). The thread-like protrusions 4 are molded at the same time when the resin portion 3 is molded.

[0024] Therefore, unlike conventional resin parts, multiple steps such as forming internal screw threads by tapping after molding the resin part are unnecessary, and the resin part 3 with internal screw-shaped protrusions 4 can be molded in a single step.

[0025] The illustrated screw-like projection 4 has a trapezoidal cross-section, and its tip is configured to engage with the threads of the insert 1 (see Figure 6). Multiple projections are provided within the gripping portion 3A of the resin portion 3 at varying heights in the vertical direction (rotation axis direction). Furthermore, numerous projections are arranged along the inner circumferential surface of the gripping portion 3A, so that all the screw-like projections 4 form a spiral circle (see Figure 5). At this time, each screw-like projection 4 is positioned so that it does not overlap with others when viewed from the vertical direction, as shown in Figure 5.

[0026] Each screw-like projection 4 tapers towards the tip, forming a rectangular shape (see Figure 7). By screwing multiple such screw-like projections 4 onto the threads of the insert 1, sufficient fixing force can be obtained, allowing the fixing piece 3B of the resin part 3 to be pressed and fixed to the underside of the deck plate P (see Figure 8(b)).

[0027] To use the insert of the present invention, insert 1 is inserted from above the deck plate P into the through hole drilled in the deck plate P (see Figure 8(a)). Further insertion is performed until the fixing piece 3B of the resin part 3 deforms and moves to the underside of the deck plate P (see Figure 8(b)). When this is done, the fixing piece 3B opens on the underside of the deck plate P, and the deck plate P is sandwiched between the fixing piece 3B and the washer 5. In other words, the elastic force of the spring 2 on the upper surface of the deck plate P causes the insert 1 to stand upright, and the fixing piece 3B contacts the underside of the deck plate P, fixing the insert 1 in place. Here, the multiple fixing pieces 3B are arranged with spacing between them so that they do not interfere with each other when passing through the through hole drilled in the deck plate P.

[0028] Next, after pouring concrete C onto the upper surface of the deck plate P, the resin part 3 is removed from the insert 1 on the underside of the deck plate P (see Figure 8(c)). At this time, the resin part 3 can be easily removed using a socket of a power tool or the like on the hexagonal gripping part 3A. As a result, only the bolt portion of the insert 1 protrudes from the underside of the deck plate P (see Figure 8(d)). Various devices are then attached to this insert 1.

[0029] The insert 1 used in this invention can be a bolt-type insert 1 of normal length, or a long-type insert 1 suitable for mounting seismic bracing frames, sensors, etc. (see Figure 9).

[0030] In this invention, a partially threaded insert is used (see Figure 8). In this case, since there is no threaded portion on the upper surface of the deck plate P, the inconvenience of the poured, unhardened concrete C dripping down along the threaded portion is eliminated. However, a fully threaded insert may also be used.

[0031] Furthermore, the support device of the present invention is not limited to the illustrated example, and for example, each component such as the insert 1, spring 2, and resin part 3 can be changed as desired, and the design can be freely modified without changing the essence of the present invention.

[0032] The present invention also includes a resin member having a through hole through which a male screw is inserted, and further includes a resin member having a plurality of projections arranged spirally at intervals on the inner wall of the through hole and engaging between the threads of the male screw. With such a resin member, conventional methods required multiple steps, such as forming the internal threads by tapping after molding the resin part, but such steps become unnecessary, and the plurality of projections can be molded simultaneously when molding the resin member, so the resin member can be molded in a single step. Preferably, the plurality of projections are arranged so that they do not overlap when viewed from the vertical direction (axial direction) of the through hole.

[0033] The screw-like projections of the present invention can be arranged and shaped according to the pitch and shape of the screw. For example, the engagement with the screw threads can be optimized by widening the spacing between the screw-like projections or adjusting the height of the projections. Furthermore, to accommodate special screw shapes, the shape of the screw-like projections can be changed to an arc shape or a polygon shape. In addition, the screw-like projections can be arranged not only around the entire circumference in a helical pattern, but also in only a portion of the area. [Explanation of symbols]

[0034] C Concrete P Deck Plate 1 Insert 2 springs 3 Resin part 3A grip part 3B Fixed piece 4 Screw-shaped projection 5 Washer

Claims

1. A spring-type insert is characterized in that a spring is attached to the head side of a bolt-type insert, and a resin part is attached to the threaded side, the spring causes the insert to stand upright on the upper surface of the deck plate, and the resin part fixes the insert on the lower surface of the deck plate, the outer shape of the lower side of the resin part is formed into a hexagonal shape, and the resin part is configured to be removed with a rotary tool.

2. The spring-type insert according to claim 1, wherein the resin part is formed by molding the resin part and simultaneously forming screw threads inside the resin part.

3. The spring-type insert according to claim 2, wherein the screw threads consist of a plurality of screw-like projections that are screwed into the insert.

4. The spring-type insert according to any one of claims 1 to 3, wherein the insert is a long type insert.

5. The insert is a spring-type insert according to any one of claims 1 to 3, wherein the insert is a partially threaded insert.

6. A resin member having a through hole through which a male screw is inserted, characterized in that it is provided with a plurality of projections arranged spirally at intervals on the inner wall of the through hole, which engage with the threads of the male screw.

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