JP2018193770A - Molding expansion joint material - Google Patents

Abstract

An object of the present invention is to obtain a molded expansion joint material capable of reducing the porosity during packing, improving stock efficiency and transportation efficiency, and improving the efficiency of placement work on a concrete placing foundation surface. SOLUTION: The expansion joint material is composed of a long flat plate-shaped joint part 1 made of an elastic material and a long pedestal part 2 made of an elastic material that supports the joint part 1 in an upright state, The bottom surface 3 of the joint portion 1 and the back surface 4 of the base portion 2 are connected via a connecting portion 5 having hinge performance, and when the joint portion 1 is rotated toward the back surface 4 side of the base portion 2, the joint portion 1 The front surface 8 of the joint portion 1 abuts the back surface 4 of the base portion 2, and the base portion contact surface 8a in the front surface 8 of the joint portion 1 has an engaging groove 10 that opens from the front surface 8 of the joint portion 1 to the bottom surface 3 , and an engagement protrusion 11 press-fitted into the engagement groove 10 is provided on the rear surface 4 of the base portion 2 . [Selection diagram] Fig. 1

Description

  The present invention relates to a molded stretch joint material that is embedded in order to absorb the behavior caused by thermal expansion and contraction of the cast concrete by dividing the edge of the concrete placement surface and cutting the edge.

When forming a waterproof protective concrete layer on the floor, rooftop, etc., before placing the concrete, in order to prevent the occurrence of cracks and the like due to the expansion and contraction of the concrete, a molded expansion joint material is preliminarily placed on the concrete foundation surface. It is arranged with.
2. Description of the Related Art Conventionally, as a molded stretch joint material, there is a molded stretch joint material having a structure in which a long flat joint portion made of an elastic material made of a synthetic resin foam such as polyethylene, polystyrene, or polypropylene is erected.

  As a molded stretch joint material having such a structure, a joint part and a base part that supports the joint part in a standing state are integrally formed (see, for example, Patent Document 1), and a joint part. A structure in which the pedestal part is formed separately, and the joint part is fitted into a fitting groove provided in the pedestal part to support the joint part in an upright state (for example, see Patent Document 2). It has been known.

JP-A-7-229278 JP 2001-227079 A

  However, the molded stretch joint material having a structure in which the joint portion and the pedestal portion are integrally formed as described in Patent Document 1 has a high porosity at the time of packing due to the presence of the pedestal portion, and has a high stock efficiency and transport efficiency. Unfortunately, there was a problem that the cost increased accordingly.

  In addition, when the molded stretchable joint material having a structure in which the joint part and the pedestal part are separately formed as described in Patent Document 2 is packed with the joint part fitted in the fitting groove of the pedestal part, Similar to the molded stretch joint material as described in Patent Document 1, the presence of the pedestal portion increases the porosity at the time of packaging, resulting in poor stock efficiency and transport efficiency, which increases the cost. In addition, if the joint portion and the pedestal portion are individually packed, the void ratio at the time of packing is lowered, but there are problems that the packing work takes time and handling and management become troublesome. Furthermore, since the joint portion and the pedestal portion are formed separately, the work of fitting the joint portion into the fitting groove of the pedestal portion and assembling is required, and the joint portion and the pedestal portion are formed integrally. There is a problem that the placement work on the foundation surface of the concrete placement becomes troublesome as compared with the molded expansion joint material having the structure.

  An object of the present invention is to provide a molded stretch joint material that can reduce the void ratio at the time of packing, improve stock efficiency and transport efficiency, and improve the work efficiency of placement on a concrete placing foundation surface. There is.

  In order to achieve the above object, the invention according to claim 1 is characterized in that a long flat joint portion made of an elastic material and a long pedestal portion made of an elastic material that supports the joint portion in an upright manner. The joint portion and the pedestal portion have a hinge performance in which a bottom surface of the joint portion and a back surface of the pedestal portion are provided with a plurality of intervals in the longitudinal direction. When the joint portion is rotated to the back side of the pedestal portion via the connection portion, the front surface of the joint portion contacts the back surface of the pedestal portion. The pedestal abutting surface on the front surface of the joint portion is provided with a plurality of engaging grooves that open from the front surface to the bottom surface of the joint portion with a space in the longitudinal direction. On the back surface of the engagement protrusion is an engagement protrusion that is press-fitted into the engagement groove. Characterized in that provided in correspondence.

According to the first aspect of the present invention, when the joint portion is tilted with respect to the pedestal portion, the bottom surface of the pedestal portion and the back surface of the joint portion are substantially in the same plane, and the plane of the pedestal portion is Since the difference in height of the front part of the joint part is reduced, it is possible to reduce the gap when the molded stretch joint material is stacked in the state where the joint part is tilted down, and to keep the porosity at the time of packaging low. Therefore, stock efficiency and transportation efficiency can be improved.
In addition, at the time of construction, raise the joint portion in the tilted state to the back side of the pedestal portion, turn the connection portion as a hinge to stand up, and set the front of the raised joint portion to the pedestal portion The contact portion is brought into contact with the back surface, and the engagement portion provided on the back surface of the pedestal portion is press-fitted into the engagement groove provided on the pedestal portion contact surface on the front surface of the joint portion. Since it can be reliably supported in the standing state by the pedestal portion, the molded stretch joint material can be easily assembled at the construction site, and the work efficiency of placement on the concrete placing foundation surface can be improved.

  According to a second aspect of the present invention, in the rear surface of the pedestal portion according to the first aspect, the front surface of the joint portion is in contact with the rear surface of the pedestal portion at a position where it does not overlap the connecting portion in the longitudinal direction. When contacting, a thin plate-like support piece that contacts the bottom surface of the joint portion and supports the joint portion is provided so as to protrude from the back surface of the pedestal portion flush with the bottom surface of the pedestal portion, The protruding length of the support piece is set such that the tip edge thereof coincides with the joint core of the joint portion when the front surface of the joint portion is in contact with the back surface of the pedestal portion. .

  According to the second aspect of the present invention, the protruding length of the support piece coincides with the joint core of the joint when the front edge of the joint comes into contact with the back of the pedestal. Since the length is set, when the molded stretch joint material is placed on the concrete casting foundation surface, the molding stretch joint material is placed on the concrete casting foundation surface with the joint portion tilted, and the support piece By aligning the tip edge of the joint with the joint marking indicated on the concrete placement foundation surface, the joint core can be visually recognized when the joint is raised, and the molded expansion joint material is applied to the concrete placement foundation surface. It can be easily and reliably arranged at a predetermined position.

  According to the molded stretch joint material according to the present invention, the void ratio during packing can be lowered, the stock efficiency and the transport efficiency can be improved, and the placement work efficiency on the concrete placing foundation surface can be improved. Can do.

It is a partially-omission plan view which shows an example of embodiment of the shaping | molding expansion-contraction joint material which concerns on this invention, and shows the state which the joint part has fallen. It is a left view of FIG. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. It is CC sectional view taken on the line of FIG. It is the left view which shows the state which stood up the joint part which fell in FIG. 1, and assembled the shaping | molding expansion-contraction joint material. It is a partially expanded perspective view of the assembled molded expansion joint material. It is the DD sectional view taken on the line of FIG. It is a description perspective view which shows the connection site | part when the end part of the shaping | molding expansion-contraction joint material which concerns on this invention is read.

Hereinafter, an example of an embodiment of a molded stretch joint material according to the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a molded stretch joint material of this example, a partially omitted plan view showing a state where the joint portion is tilted, FIG. 2 is a left side view of FIG. 1, and FIG. 3 is a cross-sectional view taken along line AA of FIG. 4 is a cross-sectional view taken along line BB in FIG. 1, FIG. 5 is a cross-sectional view taken along line CC in FIG. 1, and FIG. 6 is a stand-up joint portion shown in FIG. FIG. 7 is a partially enlarged perspective view of the assembled molded stretch joint material, FIG. 8 is a sectional view taken along the line DD of FIG. 7, and FIG. 9 is an end view of the molded stretch joint material of this example. It is explanatory perspective view which shows the connection site | part when connecting.

  The molding expansion joint material of this example is a long flat joint part 1 made of an elastic material made of a synthetic resin foam such as polyethylene, polystyrene or polypropylene, and an elastic material made of a synthetic resin foam or the like. And a long pedestal portion 2 that supports the joint portion 1 upright.

  The joint portion 1 and the pedestal portion 2 are connected to each other through a thin plate-like connecting portion 5 having a hinge performance in which a bottom surface 3 in the joint portion 1 and a back surface 4 in the pedestal portion 2 are provided at intervals in the longitudinal direction. They are connected and formed integrally.

  One end of the connecting portion 5 is connected to the back surface 6 side edge portion of the joint portion 1 on the bottom surface 3 of the joint portion 1, and the other end is connected to the bottom surface 7 side edge portion of the back surface 4 of the base portion 2, When the joint portion 1 is rotated to the back surface 4 side of the pedestal portion 2, the connecting portion 5 bends at the edge of the bottom surface 3 of the joint portion 1 at the back surface 6 side of the joint portion 1, and the bottom surface 3 of the joint portion 1. Is set to such a length that the front surface 8 of the joint portion 1 contacts the rear surface 4 of the pedestal portion 2.

  A concave groove 9 for facilitating the bending of the connecting portion 5 is formed at a connecting portion of the connecting portion 5 with the bottom surface 3 of the joint portion 1. And when the front surface 8 of the joint part 1 is made to contact | abut to the back surface 4 of the base part 2, the joint part 1 stands up at an angle of 90 degrees with respect to the base part 2 (refer FIG. 6).

  Further, in the joint portion 1, when the joint portion 1 is rotated, the pedestal portion contact surface portion 8 a on the front surface 8 that contacts the back surface 4 of the pedestal portion 2 extends from the front surface 8 of the joint portion 1 to the bottom surface 3. A plurality of engaging grooves 10 that are opened are provided at intervals in the longitudinal direction. Further, in the pedestal portion 2, an engagement protrusion 11 that press-fits into the engagement groove 10 formed in the pedestal contact surface 8 a of the rotated joint portion 1 is formed in the engagement groove on the back surface 4. Correspondingly provided.

  Further, in this example, when the front surface 8 of the joint portion 1 is in contact with the rear surface 4 of the pedestal portion 2 at a position that does not overlap the back surface 4 of the pedestal portion 2 in the longitudinal direction, A thin plate-like support piece 12 that contacts the bottom surface 3 and supports the bottom surface 3 of the joint portion 1 is provided so as to protrude from the back surface 4 of the pedestal portion 2 so as to be flush with the bottom surface 7 of the pedestal portion 2. The protruding length of 12 is set such that the tip edge thereof coincides with the joint core X of the joint portion 1 when the front surface 8 of the joint portion 1 contacts the back surface 4 of the pedestal portion 2 (FIG. 6). reference.). The thickness of the support piece 12 is the same as the thickness of the connecting portion 5.

  Further, in this example, an adhesive is injected into the back surface 4 of the pedestal portion 2 to inject an adhesive between the pedestal portion contact surface portion 8a of the joint portion 1 and the back surface 4 of the pedestal portion 2. A plurality of grooves 13 are provided at predetermined intervals in the longitudinal direction of the pedestal portion 2. The adhesive injection groove 13 is provided on the back surface 4 of the base portion 2 from the flat surface 14 side toward the bottom surface 7 side.

Further, in this example, the joint portion 1 and the pedestal portion 2 that are integrally connected by the connecting portion 5 are formed in the same length, and the joint portion 1 is longer than the pedestal portion 2 at one end side in the length direction. The pedestal portion 2 is formed to be longer than the joint portion 1 on the other end side by an amount shorter than the joint portion 1 on one end side.
Further, a notch portion 16 is provided on the lower surface of the end portion in the longitudinal direction of the pedestal portion 2 from the front surface 15 side to the rear surface 4 side of the pedestal portion 2.

The formed stretch joint material configured as described above is arranged on the concrete placing foundation surface as follows.
First, in a state where the joint portion 1 is tilted, a molded expansion joint material is installed on the concrete placement foundation surface according to the joint marking Y displayed on the concrete placement foundation surface (see FIG. 1), and the pedestal portion 2. The bottom surface 7 is bonded and fixed to the concrete placing foundation surface with an adhesive or double-sided tape.

  When the installation of the molded stretch joint material is arranged on the concrete placement foundation surface, in this example, the protruding length of the support piece 12 provided on the back surface 4 of the pedestal portion 2 is the tip edge of the joint portion 1. Since the length of the front face 8 is set to coincide with the joint core X of the joint section 1 when the front face 8 abuts against the back face 4 of the pedestal section 2, the joint where the front end edge of the support piece 12 is displayed on the concrete placement foundation surface By matching with the split ink Y, the joint core X when the joint portion 1 is erected can be visually recognized, and the molded stretch joint material is easily and reliably disposed at a predetermined position on the concrete placing foundation surface. be able to.

  After the molded stretch joint material is installed on the concrete placement foundation surface and the bottom surface 7 of the pedestal part 2 is fixed to the concrete placement foundation surface, the joint part 1 in a collapsed state is raised to the back surface 4 side of the pedestal part 2 and connected. The part 5 is turned as a hinge to stand up, and the front face 8 of the joint part 1 is brought into contact with the back face 4 of the pedestal part 4 and provided on the pedestal part contact surface part 8a on the front face 8 of the joint part 1. The joint portion 1 can be supported in an upright state by the pedestal portion 2 by press-fitting the engagement protrusion 11 provided on the back surface 4 of the pedestal portion 2 into the engagement groove 10 (see FIG. 6).

  In this way, when the molded stretch joint material is assembled on the concrete placing foundation surface, an adhesive is applied or injected between the pedestal abutment surface portion 8a on the front surface 8 of the joint portion 1 and the back surface 4 of the pedestal portion 2. To do. Thereby, the base part contact surface part 8a in the front surface 8 of the joint part 1 and the back surface 4 of the base part 2 are fixed with an adhesive, and the joint part 1 is firmly fixed in a state where the base part 2 stands on the concrete placing foundation surface. Supported.

  In this example, an adhesive injection groove 13 for injecting an adhesive between the pedestal part contact surface part 8 a of the joint part 1 and the back surface 4 of the pedestal part 2 on the back surface 4 of the pedestal part 2. Is provided on the back surface 4 of the pedestal portion 2 from the flat surface 14 side toward the bottom surface 7 side, so that an adhesive can be easily applied between the pedestal portion contact surface portion 8a of the joint portion 1 and the back surface 4 of the pedestal portion 2. Since the injection can be performed and the adhesive is injected into the adhesive injection groove 13 from the side of the flat surface 14 of the pedestal 2, the injection operation can be easily performed.

  Moreover, when a concrete placement foundation surface is wide, it uses so that the length direction edge part of a some shaping | molding expansion-contraction joint material may be faced | matched and connected. In this case, in this example, the joint portion 1 and the pedestal portion 2 that are integrally connected by the connecting portion 5 are formed to have the same length, and the joint portion 1 is located at one end side in the length direction from the pedestal portion 2. Since the base portion 2 is formed longer than the joint portion 1 on the other end side, the base portion 2 is formed longer than the joint portion 1 on the other end side.

  Further, in this example, the notch 16 is provided on the lower surface of the end of the pedestal 2 in the longitudinal direction from the front 15 side to the back 4 of the pedestal 2, so Water, such as rain, poured into the concrete placement foundation surface where a void is formed between the foundation surface and the void formed by the notch 16 becomes a water drainage portion and the molded stretch joint material is disposed. Can be discharged out of the concrete foundation surface.

DESCRIPTION OF SYMBOLS 1 Joint part 2 Base part 3 Bottom face 4 Back face 5 Connection part 6 Back face 7 Bottom face 8 Front face 8a Base part contact surface part 9 Groove 10 Engagement groove 11 Engagement protrusion 12 Supporting piece 13 Adhesive injection groove 14 Plane 15 Front face 16 Notch X Joint core Y Joint joint ink

It is a partially-omission plan view which shows an example of embodiment of the shaping | molding expansion-contraction joint material which concerns on this invention, and shows the state which the joint part has fallen. It is a left view of FIG. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. It is CC sectional view taken on the line of FIG. It is the left view which shows the state which stood up the joint part which fell in FIG. 1, and assembled the shaping | molding expansion-contraction joint material. It is a partially expanded perspective view of the assembled molded expansion joint material. It is the DD sectional view taken on the line of FIG. The end of the forming expansion joint member according to the present invention is an explanatory perspective view showing a connecting portion of the connecting Idatoki.

Claims (2)

  A stretchable joint material comprising a long flat joint made of an elastic material and a long pedestal made of an elastic material that supports the joint in an upright manner, wherein the joint and the pedestal The part is integrally formed by connecting the bottom surface of the joint part and the back surface of the pedestal part via a plurality of connecting parts having hinge performance provided at intervals in the longitudinal direction. When the joint portion is rotated to the back side of the pedestal portion, the front surface of the joint portion is brought into contact with the back surface of the pedestal portion, and the pedestal portion contact surface in front of the joint portion is Are provided with a plurality of engaging grooves that open from the front surface to the bottom surface of the joint portion at intervals in the longitudinal direction, and the engaging protrusions that are press-fitted into the engaging grooves are provided on the back surface of the pedestal portion. Formed expansion joint characterized by being provided corresponding to the engagement groove . The back surface of the pedestal portion is in contact with the bottom surface of the joint portion when the front surface of the joint portion is in contact with the back surface of the pedestal portion at a position that does not overlap the connecting portion in the longitudinal direction. A thin plate-like support piece is provided so as to protrude from the back surface of the pedestal portion flush with the bottom surface of the pedestal portion, and the protruding length of the support piece is such that the tip edge of the joint portion is The molded stretch joint material according to claim 1, wherein the length is set to a length that coincides with a joint core of the joint portion when a front surface is in contact with a back surface of the pedestal portion.

Images