JP6400968B2 - Implanting member fixing device - Google Patents

Description

  The present invention is used when manufacturing a concrete product in which an embedded member is embedded, and an embedded member having an embedded portion and an exposed portion is embedded in the embedded portion of the concrete product mold. It is related with the fixing device of the embedding member which fixes so that it may be located in a formwork and an exposed part may go out from the hole opened in the formwork.

When manufacturing concrete products with embedded members, the embedded part is fixed using a jig separately from the concrete product formwork, and the concrete is placed with the embedded part fixed. Thus, a method for obtaining a concrete product in which an embedded portion is embedded at a desired position is known.
As this type of fixing device for the embedded member, the present applicant has proposed a structure as shown in, for example, Patent Document 1 or Patent Document 2.

  Among these, the structure described in Patent Document 1 includes a locking member that sandwiches the exposed portion of the embedded member with a pair of sandwiching pieces, and a pull-down member that is fixed below the locking member. According to such a configuration, the fixing device for the embedded member can be manufactured easily and inexpensively with a small number of parts, and the fixing of the embedded member to the mold can be performed uniformly and reliably.

JP 2010-115906 A JP 2011-168018 A

  By the way, in the structure described in Patent Document 1 described above, since the pair of sandwiching pieces are fixed to each other by the bolts and nuts, tightening work of the bolts and nuts has occurred.

  Therefore, an object of the present invention is to provide a fixing device for an embedded member that can be attached to an embedded member without performing a bolt and nut tightening operation and has improved workability.

  The present invention has been made to solve the above-described problems, and is characterized by the following.

According to a first aspect of the present invention, an embedding member having an embedding portion and an exposed portion is provided with a hole in which the embedding portion is located in the mold frame and the exposed portion is opened in the mold frame with respect to the mold of the concrete product A fixing device for an embedding member that is fixed so as to come out from the engagement member, and includes an engagement jig that engages with the exposed portion, and a pull-down portion that pulls down the engagement jig, and the engagement jig Is provided with an engaging portion that is inserted substantially horizontally above the engaged portion formed in the exposed portion and engages, and the tip of the engaging portion has a downward direction that engages with the engaged portion . A locking claw is provided, and when the engaging portion and the engaged portion are engaged, the lower surface of the engaging portion comes into contact with the upper surface of the engaged portion, and the locking claw is It is characterized by being hooked to the edge of the engaged portion.

  The invention described in claim 2 is characterized in that, in addition to the feature point of the invention described in claim 1, the lower surface of the engaging portion is inclined so that the tip side becomes higher.

  According to a third aspect of the invention, in addition to the features of the first aspect of the invention described in the first or second aspect, the engagement jig includes two engagement portions. A connecting portion for connecting the pull-down portion is provided between the portions.

  The invention according to claim 1 is as described above, and the engaging jig includes an engaging portion that is inserted substantially horizontally above the engaged portion formed in the exposed portion of the embedded member and engages. A locking claw that engages with the engaged portion is provided at a tip of the engaging portion, and when the engaging portion and the engaged portion are engaged, the lower surface of the engaging portion Is in contact with the upper surface of the engaged portion, and the locking pawl is hooked to the edge of the engaged portion. Therefore, it is possible to attach the engaging jig to the embedded member simply by inserting the engaging part of the engaging jig above the engaged part and hooking the locking claw. Is not necessary and workability is good. Further, since the engaging jig is only hooked on the embedded member, it can be easily removed.

  Further, the invention according to claim 2 is as described above, and the lower surface of the engaging portion is inclined so that the tip side is higher, so that the inner side of the locking claw has an inverted V shape, The engaged portion can be reliably engaged with the inverted V-shaped portion.

  The invention according to claim 3 is as described above, and the engagement jig includes two engagement portions, and the pull-down portion is provided between the two engagement portions. Since the connection part for connecting is provided, the force which pulls down equally with respect to an embedding member can be applied. That is, an uneven load is not applied, and the embedded member can be pulled straight downward.

It is the external view which looked at the fixing device of the embedding member from the front. It is the external view which looked at the fixing device of the embedding member from the side. It is (a) top view of an engagement board, (b) front view, (c) side view, (d) AA sectional view taken on the line. It is explanatory drawing which shows a mode that an engagement jig is engaged with an embedding member. It is a figure explaining a pulling-down part, Comprising: It is a figure of the state which clamped the attachment axis | shaft of the engagement jig | tool with (a) the top view of a pinching spring, and (b) pinching spring.

Embodiments of the present invention will be described with reference to the drawings.
The fixing device 10 of the embedding member 30 according to this embodiment is for fixing the embedding member 30 to be embedded in a concrete product to the mold 40. For example, when manufacturing concrete products such as concrete sleepers and track slabs, it is used to embed a shoulder member for fixing a rail.

  The embedding member 30 used in the present embodiment has an embedding part 31 embedded in a concrete product and an exposed part 32 protruding outward from the concrete product. The fixing device 10 for the embedding member 30 according to this embodiment includes the embedding member 31 such that the embedding portion 31 is located in the mold 40 and the exposed portion 32 is exposed from the hole 40a formed in the mold 40. 30 is fixed to the mold 40. In this manner, concrete is poured into the mold 40 with the embedded member 30 fixed to the mold 40 to produce a concrete product, whereby a concrete product in which the embedded member 30 is embedded can be obtained. .

  As shown in FIGS. 1 and 2, the exposed portion 32 of the embedding member 30 is formed between two engaged portions 33 that are formed to project sideways and the two engaged portions 33. A central recess 34 and projecting walls 35 provided on both sides of the central recess 34 are provided.

The fixing device 10 that fixes the embedded member 30 includes an engagement jig 11 that engages with the exposed portion 32 of the embedded member 30 and a pull-down portion 21 that pulls down the engagement jig 11. .

  The engagement jig 11 is formed by attaching an attachment shaft 20 below the engagement plate 12.

  As shown in FIG. 3, the engagement plate 12 includes two engagement portions 13 provided on both sides, a connection portion 15 provided between the two engagement portions 13, an engagement portion 13, and a connection portion 15. And a slit 17 formed between the two.

  The engaging portion 13 is a portion that is inserted and engaged substantially horizontally above the above-described engaged portion 33, and a downward-facing portion that engages with the engaged portion 33 is formed at the tip of the engaging portion 13. A locking claw 14 is provided. Further, the lower surface of the engaging portion 13 is inclined so that the tip end side is higher, and an inverted V-shape is formed inside the locking claw 14. The inclination of the engaging portion 13 is substantially the same as the inclination of the upper surface of the engaged portion 33, and when the engaging portion 13 and the engaged portion 33 are engaged, the engaging plate 12 is It is set to be horizontal (so that the axis of the mounting shaft 20 described later is vertical).

  The connection portion 15 is a portion for attaching the attachment shaft 20 and includes an attachment hole 16 for attaching the attachment shaft 20. By inserting and fixing the mounting shaft 20 into the mounting hole 16, the engagement plate 12 and the mounting shaft 20 are integrally coupled.

  The slit 17 is for releasing the engagement plate 12 so as not to interfere with the protruding wall 35 of the embedded member 30 when the engagement portion 13 and the engaged portion 33 are engaged. In other words, as shown in FIG. 1, the protruding wall 35 of the embedded member 30 enters the slit 17 when the engaging portion 13 and the engaged portion 33 are engaged.

  The mounting shaft 20 is a rod-shaped member having a tapered expansion head 20 a formed at the lower end, and the upper end is inserted into the mounting hole 16 and fixed to the engagement plate 12. The bulging head 20a at the tip of the mounting shaft 20 is formed in a tapered shape such that its diameter increases as it goes downward so that it is pulled downward by being pinched by a pinching spring 24 of the pulling portion 21 described later. Yes.

  When attaching the engaging jig 11 to the exposed portion 32 of the embedding member 30, the engaging jig 11 may be inserted and hooked from the rear of the embedding member 30, as shown in FIG. That is, the engaging portion 13 of the engaging jig 11 may be inserted substantially horizontally above the engaged portion 33 formed in the exposed portion 32. The engaging portion 13 can be inserted to a position where the tip of the connecting portion 15 hits the inside of the central recess 34. By inserting the engaging portion 13 to the back in this way, the engaging portion 13 and the engaged portion 33 can be engaged. When the engaging portion 13 and the engaged portion 33 are engaged, the lower surface of the engaging portion 13 comes into contact with the upper surface of the engaged portion 33 as shown in FIG. Since it latches on the edge of the to-be-engaged part 33, the engagement jig | tool 11 and the embedding member 30 can be engaged reliably.

  When the engaging portion 13 is inserted to a position where the tip of the connecting portion 15 hits the inside of the central recess 34, the protruding wall 35 of the embedded member 30 enters the slit 17 of the engaging plate 12, but the slit 17 It is formed so deep that the tip of the protruding wall 35 does not hit. Thus, since the play is provided so that the protruding wall 35 does not come into contact with the back of the slit 17, an excessive load is not applied to the engaging jig 11 and the embedded member 30.

  After the engaging jig 11 is attached to the exposed portion 32 of the embedded member 30 as described above, the embedded portion 31 of the embedded member 30 is dropped into the hole 40a of the mold 40. At this time, the embedded member 30 is supported by the descending stop portion 36 and the stopper 37 so as not to be lowered too much. The descending stop portion 36 is a resin member attached to the embedded member 30, and forms a flange at the boundary between the embedded portion 31 and the exposed portion 32. As shown in FIGS. 1 and 2, the descending stop portion 36 engages with the peripheral edge portion of the hole 40 a of the mold 40 and supports the embedded member 30 so as not to lower too much. The stopper 37 is a long material having an L-shaped cross section as shown in FIG. By abutting the rear end portion of the engaged portion 33 of the embedded member 30 inside the stopper 37, the embedded member 30 is prevented from being lowered too much. The position of the embedded member 30 may be determined by making the stopper 37 movable and pressing the embedded member 30 forward (leftward in FIG. 2) by the stopper 37.

  When the embedding member 30 to which the engaging jig 11 is attached in this manner is dropped into the hole 40a of the mold 40, the attaching shaft 20 of the engaging jig 11 is then pulled down by the pulling portion 21, thereby embedding. The member 30 can be fixed to the mold 40.

  As shown in FIGS. 1 and 2, the pull-down portion 21 is disposed below the mold 40 and includes a window hole 21 a so as to face the hole 40 a of the mold 40. The pull-down portion 21 is formed so as to be able to advance and retract in the longitudinal direction (left and right direction in FIG. 1), and the embedded member 30 is fixed to and released from the mold 40 by this advance and retract operation.

  Specifically, a spring support portion 22 for supporting the pinching spring 24 is fixed inside the lowering portion 21, and when the lowering portion 21 moves forward and backward, the pinching spring 24 is engaged and cured. It is adapted to engage or disengage from the mounting shaft 20 of the tool 11.

  The pinching spring 24 is formed by bending one spring wire, and as shown in FIG. 5A, the interval between them is wider than the large diameter portion of the expansion head 20 a of the mounting shaft 20. From the state, the introduction portion 24a that gradually decreases to the extent that the expansion head 20a is sandwiched, the clamping portion 24b that is formed at intervals to apply the necessary clamping pressure to the expansion head 20a, and the inverted C-shape that joins the clamping portions 24b on both sides And a mounting portion 24d formed by bending the distal end portion of the introduction portion 24a outward.

  Further, the spring support portion 22 is formed with a support groove 22a extending in the forward / backward direction, and a fitting hole (not shown) for inserting the attachment portion 24d of the pinching spring 24 into the support groove 22a. ) Is drilled.

The pinching spring 24 is inserted into the support groove 22a of the spring support portion 22 and supported by the spring support portion 22 inside the pull-down portion 21 by inserting the attachment portion 24d into the fitting hole.
The lowering portion 21 operates as follows.

  That is, first, when the tapered expansion head 20 a of the mounting shaft 20 is protruded below the hole 40 a of the mold 40, the expansion head 20 a is positioned between the introduction portions 24 a of the pinching spring 24. Yes. When the pull-down portion 21 is moved in this state, the expansion head 20a can be clamped by the pinching portion 24b of the pinching spring 24 as shown in FIG. By such an operation, the taper-shaped expansion head 20a is pressed down by this clamping pressure, and a force for pulling down the embedded member 30 via the mounting shaft 20 acts. Pressed strongly against the bottom. For this reason, the embedding member 30 is fixed to the bottom of the mold 40 so that it does not move even when an external force is applied.

  And if concrete is cast and a concrete product is shape | molded in the state which fixed the embedding member 30 in this way, the pulling-down part 21 will be moved to the reverse direction. Thereby, since the clamping pressure of the expansion head 20a by the clamping spring 24 is released, the fixing of the embedded member 30 is released, and the concrete product can be smoothly demolded.

  In addition, although the means for advancing and retracting the pulling portion 21 is not particularly described, various reciprocating mechanisms as described in Patent Document 2, for example, can be used. For example, it may be a screw type that is inexpensive and can be easily operated manually, or may use an actuator.

  Further, the structure of the lowering portion 21 is not limited to the above-described form, and any structure may be used as long as the engaging jig 11 can be pulled down. For example, the pulling part 21 may move up and down, or the pulling part 21 may be pulled down by the weight of the pulling part 21.

  As described above, according to the present embodiment, the engaging jig 11 is engaged substantially by being inserted horizontally above the engaged portion 33 formed in the exposed portion 32 of the embedded member 30. The engaging portion 13 is provided with a locking claw 14 that engages the engaged portion 33 at the tip of the engaging portion 13, and the engaging portion 13 and the engaged portion 33 are engaged with each other. In some cases, the lower surface of the engaging portion 13 is in contact with the upper surface of the engaged portion 33, and the locking claw 14 is hooked on the end edge of the engaged portion 33. Therefore, the engaging jig 11 can be attached to the embedded member 30 simply by inserting the engaging portion 13 of the engaging jig 11 above the engaged portion 33 and hooking the locking claw 14. Nut tightening work is not necessary and workability is good. Further, since the engaging jig 11 is only hooked on the embedded member 30, it can be easily removed.

  Further, since the lower surface of the engaging portion 13 is inclined so that the tip side becomes higher, the inner side of the locking claw 14 has an inverted V-shape, and the inverted V-shaped portion is reliably engaged. The part 33 can be engaged.

  The engagement jig 11 includes two engagement portions 13, and a connection portion 15 for connecting the pull-down portion 21 is provided between the two engagement portions 13. Therefore, it is possible to apply a force to pull down the embedded member 30 evenly. In other words, an uneven load is not applied, and the embedded member 30 can be pulled straight downward.

DESCRIPTION OF SYMBOLS 10 Fixing device 11 Engagement jig 12 Engagement plate 13 Engagement part 14 Locking claw 15 Connection part 16 Attachment hole 17 Slit 20 Attachment shaft 20a Expansion head 21 Pull-down part 21a Window hole 22 Spring support part 22a Support groove 24 Clamping spring 24a introduction part 24b clamping part 24c joint part 24d attachment part 30 embedding member 31 embedding part 32 exposed part 33 engaged part 34 central recess 35 projecting wall 36 descending stop part 37 stopper 40 mold 40a hole

Claims (3)

An embedded member having an embedded part and an exposed part is fixed to a concrete product form so that the embedded part is located in the form frame and the exposed part goes out of the hole formed in the form frame. A fixing device for an embedded member,
An engagement jig that engages with the exposed portion;
A lowering portion for lowering the engagement jig;
With
The engaging jig includes an engaging portion that is inserted and engaged substantially horizontally above the engaged portion formed in the exposed portion,
A downward locking claw that engages with the engaged portion is provided at the tip of the engaging portion,
When the engaging portion and the engaged portion are engaged, the lower surface of the engaging portion comes into contact with the upper surface of the engaged portion, and the locking claw is an edge of the engaged portion. A fixing device for an embedding member, wherein the fixing device is hooked onto the device.   The fixing device for an embedded member according to claim 1, wherein a lower surface of the engaging portion is inclined so that a tip end side thereof becomes higher.   The engagement jig includes two engagement portions, and a connection portion for connecting the pull-down portion is provided between the two engagement portions. The fixing device for an embedding member according to claim 1 or 2.

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