JP4538834B2 - Deformation prevention tool - Google Patents

Description

  The present invention attaches a cover for a wiring box or a wiring box that is used by being embedded in a concrete wall and is deformed by being pressed by the concrete to be placed, and is later attached to the device mounting portion. The present invention relates to a deformation prevention device that prevents the inability to perform the above.

  As a cover for a wiring box in consideration of preventing deformation due to concrete placement, a cover described in Patent Document 1 has been proposed.

  6A and 6B show the wiring box cover. FIG. 6A is a front view thereof, and FIG. 6B is a YY sectional view of FIG.

  The wiring box cover 10 further includes a frame-like body 11 that comes into contact with the wiring box housed in the back of the wall, a coating wall 13 that rises from the inner edge of the frame-shaped body 11 toward the wall surface, and the coating wall 13. A plurality of pairs of upper and lower appliance mounting portions 14 provided as inward projections, and an appropriate coating wall 13 between these fixture mounting portions 14 are connected to support the compressive force due to concrete placement. A plate-like support 20 is provided.

  The support 20 includes a connecting portion 21 that partially connects the support 20 and the coating wall 13, ribs 22 provided to increase the strength of the support 20 in the vertical compression force in the figure, and It has.

  Since this wiring box cover 10 is used with the support 20 attached when the concrete is placed, it is difficult to be deformed even if this portion is pressed by the concrete to be placed. In this case, it is possible to prevent such a situation that it cannot be attached.

  In addition, when attaching the instrument after placement, the support 20 is only partially connected to the coating wall 13 by the connecting portion 21, and therefore can be easily removed at the site, hindering the installation of the instrument. It will not be.

  However, the support 20 of the wiring box cover 10 does not directly support the part of the instrument mounting portion 14 to which the instrument is to be attached, and further improvement has been desired. In addition, since the support 20 is integrated with the cover 10 and discarded after use, improvement has been desired from this point of view.

The same problem is common to the wiring box.
Japanese Patent Laid-Open No. 9-149526 (FIG. 1)

  The present invention is intended to solve the above-described problem, and more reliably prevents deformation of the cover for the wiring box or the device mounting portion of the wiring box, and prevents the deformation from being discharged after use. The purpose is to provide.

The deformation prevention tool according to claim 1 is a cover for a wiring box or a deformation prevention tool for a wiring box used by being embedded in a concrete wall,
The wiring box cover or the wiring box is spanned between a pair of instrument mounting portions, and has a strength capable of resisting the compressive force that can act between the instrument mounting portions by placing concrete. It is configured to be detachably attached so as not to fall off from the instrument attaching portion.

The deformation preventing device according to claim 1 is further provided on a back side of the instrument mounting portion and connected to the mounting portion and a pair of mounting portions used for attachment to the instrument mounting portion. The apparatus includes a pair of abutting portions that abut against the facing portion of the instrument mounting portion, and a support portion that connects the abutting portions and supports the compressive force.

The deformation preventing device according to claim 2 is dependent on claim 1 , and the fitting portion is provided with a fitting protrusion that fits into a mounting hole provided in the device mounting portion. .

The deformation preventing tool according to claim 3 is dependent on claim 1 and is characterized in that the attachment portion is provided with a female screw portion into which a screw inserted into the instrument mounting portion is screwed.

The deformation prevention tool according to claim 4 is a deformation prevention tool for a wiring box cover or a wiring box used by being embedded in a concrete wall, and between the pair of appliance mounting portions of the wiring box cover or the wiring box. It has a strength that can resist the compressive force that can be applied between the instrument mounting parts by placing concrete, and is detachably mounted so that it does not fall out of the instrument mounting part even by the placing. Configured to be
A pair of attachment portions that are in contact with the surface side of the appliance attachment portion and have a thickness that does not hinder the use of the wiring box cover or the interconnection box, and are used for attachment to the appliance attachment portion, and the appliance attachment And a support part that connects the attachment part and the contact part to support the compressive force.

According to a fifth aspect of the present invention, the deformation preventing tool according to the fourth aspect is characterized in that the attachment portion is provided with a screw hole through which a screw inserted through the instrument mounting portion is inserted.

A deformation prevention tool according to a sixth aspect is dependent on the first or fourth aspect, and is fitted and attached between the instrument attachment portions by the pair of contact portions.

The deformation preventing tool according to claim 7 is dependent on any one of claims 1 to 6 , and a bolt for drawing the wiring box cover or the front surface of the wiring box to the concrete form is inserted into the support portion. An insertion hole is formed.

The deformation prevention device according to claim 8 is dependent on any one of claims 1 to 7 , and the deformation prevention device is fixed to the support portion on a concrete formwork leaning against the cover for the wiring box or the front surface of the wiring box. A nail insertion portion is provided.

A deformation prevention tool according to a ninth aspect is dependent on any one of the first to eighth aspects, and is configured to be attachable from the surface side of the instrument attachment portion.

  According to the deformation prevention tool according to claim 1, a cover for a wiring box or a deformation prevention tool for a wiring box that is used by being embedded in a concrete wall, and a pair of fixtures attached to the wiring box cover or the wiring box Has a strength that can resist the compressive force that can be applied between the instrument mounting parts by placing concrete, so that it does not fall off from the instrument mounting part even by the placement, and can be attached and detached. Since it is configured to be attached in a possible manner, it is possible to directly and effectively prevent the deformation of the instrument mounting portion that is particularly required to prevent deformation. In addition, it can be used repeatedly and does not generate waste.

According to the deformation preventing device of claim 1, the mounting portion used for attaching the instrument mounting portion to the back surface to prevent the dropping and the pair of contacts contacting the facing portion of the instrument mounting portion Since the support portion that supports the compressive force caused by the concrete placement in combination with the portion is specifically defined, the effect of claim 1 can be more reliably exhibited.

According to the deformation preventing tool of claim 2, in addition to the effect of claim 1 , the attachment portion is provided with a fitting protrusion that fits into a mounting hole provided in the instrument mounting portion. Due to the fitting between the fitting projection and the fixture mounting portion, the deformation preventing tool does not fall off from the wiring box cover or the wiring box even if there is vibration due to concrete placement.

According to the deformation preventing tool of the third aspect, in addition to the effect of the first aspect , since the female screw portion into which the screw inserted into the instrument mounting portion is screwed is provided in the attachment portion. Due to the screw engagement between the part and the screw, the deformation preventing tool does not fall off from the wiring box cover or the wiring box even if there is vibration due to concrete placement.

According to the deformation preventing tool of claim 4 , the attachment part used for attachment to the surface of the instrument attachment part to prevent the drop off, and the pair of contact parts abutting against the facing part of the instrument attachment part In combination, since the support part that supports the compressive force by the concrete placement is specifically defined, the effect of claim 1 can be more reliably exhibited.

Moreover, according to this deformation prevention tool, the protrusion to the surface side does not become an obstacle,
Moreover, since it can attach by operation of the surface side, attachment is easy.

According to the fifth aspect of the present invention, in addition to the effect of the fourth aspect , the attachment portion is provided with a screw hole through which the screw inserted into the instrument mounting portion is inserted. Since the attachment is carried out completely by the holes, it is hardly affected by the placement vibration.

According to a sixth aspect of the present invention, in addition to the effect of the first or fourth aspect , the pair of abutting portions are fitted and attached between the appliance mounting portions, thereby vibrating due to concrete placement. Even if there is, the deformation prevention tool does not fall off from the cover for the wiring box or the wiring box.

According to the deformation preventing tool of claim 7 , in addition to the effect of any of claims 1 to 6 , the support portion includes a bolt for drawing the wiring box cover or the front of the wiring box to the concrete formwork. Since the insertion hole to be inserted is formed, there is no need to remove the deformation prevention tool for inserting the bolt, which is convenient.

According to the deformation prevention tool according to claim 8 , in addition to the effect of any one of claims 1 to 7, the deformation prevention is applied to the support portion and the concrete form frame leaning against the front of the wiring box cover or the wiring box. Since the nail insertion part for fixing the tool is provided, the cover for the wiring box or the wiring box can be positioned on the concrete formwork also by this deformation preventing tool.

According to the deformation prevention device of claim 9 , in addition to the effect of any one of claims 1 to 8 , since it is configured to be attachable from the surface side of the device attachment portion, the wiring box of the deformation prevention device in the field Easy to attach to the cover or wiring box.

  Hereinafter, embodiments (examples) of the present invention will be described with reference to the drawings.

  FIG. 1 shows an example of the deformation preventing device of the present invention, (a) is a front view thereof, (b) is a side view, and FIG. 2 shows a use state of the deformation preventing device of FIG. (A) is principal part sectional drawing of the part which installed the deformation | transformation prevention tool, (b) is a front view.

  This deformation prevention tool 5 is an instrument such as a wiring box cover in order to prevent the wiring box cover or wiring box embedded in the concrete wall from being pressed and deformed by the placed concrete. It is used by being attached to the attachment portion.

  In the following, the case where the deformation preventing tool 5 is used for the wiring box cover K (see FIG. 2) as shown in FIG. 2 will be described. However, this wiring box cover K is generally combined with the wiring box as a whole. Therefore, the deformation preventing tool 5 can also be used for preventing deformation of the wiring box.

  The deformation prevention tool 5 is manufactured from a material having high rigidity, preferably a steel flat plate, and as a whole, the flat plate is bent into a pull-out handle shape in the longitudinal direction.

  A pair of both end portions of the handle-shaped deformation prevention tool 5 is located on the back side of the device mounting portion KA of the wiring box cover K to be mounted, and is used for attachment to the device mounting portion KA. A pair of abutment portions 2 that are connected to the attachment portion 1 and abut against the facing portion of the instrument mounting portion KA, and the pair of abutment portions 2 are connected to each other, A support portion 3 that supports a compressive force that can act between the instrument mounting portions KA by placing concrete is provided.

  As will be described later, the pair of abutting portions 2 supported by the support portion 3 abuts against the pair of instrument mounting portions KA of the wiring box cover K and is inserted without gaps, and between the instrument mounting portions KA. It regulates the interval to be within a predetermined range and plays a role of preventing deformation.

  The pair of attachment portions 1 are provided with a female screw portion 1a into which a screw B (see FIG. 2) inserted through the device mounting portion KA of the wiring box cover K assembled with the deformation preventing device 5 is screwed. ing.

  An insertion hole 3a is provided at the center of the support portion 3 so as to be screwed into a female screw formed on the bottom wall of the wiring box and into which a bolt for pulling the front surface of the wiring box cover to the concrete form is inserted. Therefore, the deformation preventing tool 5 does not hinder the insertion of a bolt for pulling the wiring box cover.

  In addition, a nail insertion portion 3b for fixing the deformation prevention tool 5 to a concrete form frame leaning on the front surface of the wiring box cover is provided at an appropriate position of the support portion 3. Therefore, the nail insertion portion 3b is used. Thus, the cover for the wiring box provided with the deformation preventing tool 5 can be positioned and fixed to the concrete formwork.

In the bent part between the support part 3 and the contact part 2, the reinforcing recess 3c is intentionally formed simultaneously with the bending process.
Is formed. The reinforcing recess 3c contributes to maintaining the angle of the bent portion, and the support portion 3 provides a stronger compressive force that acts on the contact portion 2 from the appliance mounting portion KA of the wiring box cover K due to concrete placement. I can support it.

  The operational effects of the deformation preventing tool 5 will be described with reference to the use state diagram of FIG.

  When the deformation prevention tool 5 is attached to the wiring box cover K, as shown in FIG. 2, the attachment portion 1 abuts against the back surface of the instrument attachment portion KA of the cover K, and the abutment portion 2 The support portion 3 is on the wall surface side so as to be sandwiched between the pair of instrument mounting portions KA.

  Thereafter, the screw B is screwed into the mounting hole KB of the instrument mounting part KA while maintaining the contact state between the attachment part 1 and the back surface of the instrument mounting part KA. Then, this screw B is screw-engaged with the female screw portion 1a of the attachment portion 1 after being screw-engaged with the female screw KC originally incorporated in the mounting hole KB.

  The screw B is screwed in until the screw head is sufficiently depressed in the mounting hole KB of the instrument mounting portion KA so that the screw head does not protrude from the instrument mounting portion KA to the wall side. During this screwing, the deformation preventing tool 5 maintains its supporting state and finally becomes the state shown in FIG.

  In this state, the anti-deformation function of the appliance mounting portion KA of the cover K for the wiring box by the change preventing tool 5 is exhibited and maintained, and this is maintained until the deformation preventing tool 5 is intentionally removed. Therefore, if the deformation preventing tool 5 is removed after the concrete is solidified after placing the concrete, an appropriate instrument can be attached thereto without any trouble.

  At this time, since the deformation preventing tool 5 is attached to the instrument mounting portion KA that most needs to be prevented from deforming and prevents deformation of this portion, the deformation preventing function acts directly and functions effectively. Further, since deformation is prevented on the mounting surface side to which the instrument is attached, this is also effective.

  Furthermore, since the deformation preventing tool 5 can be used for another wiring box cover K after use, it does not generate waste.

  Further, as shown in FIG. 2, the attachment work of the deformation preventing tool 5 can be performed from the surface side of the wiring box cover K, so that the work is easy.

  In the case where there is no female screw part 1a of the attachment part 1, the distance between the pair of contact parts 2 increases so that the gradient of the contact part 2 goes to the surface side. When the instrument mounting portion KA is fitted, the deformation prevention tool 5 is placed on the surface side when a compressive force is applied from the instrument mounting portion KA of the wiring box cover K corresponding to the contact portion 2. That is, a force that pushes toward the wall surface is generated, and this force is received by the attachment portion 1 and the back surface of the instrument mounting portion KA, thereby preventing the deformation prevention tool 5 from falling off.

  FIG. 3 shows another example of the deformation preventing device according to the present invention, in which (a) is a rear view thereof, (b) is a partially broken side view, (c) is a front view, and (d) is an opposite side surface. FIG. 4 (e) is a lower view of FIG. 4 (c), FIG. 4 shows a use state of the deformation preventing device of FIG. 3, and FIG. b) is a front view.

  Accordingly, the same portions are denoted by the same reference numerals, and redundant description is omitted.

  This deformation prevention tool 5A produces the same effect as the deformation prevention tool 5 of FIG. 1, but as a whole, the material thereof uses a high-strength synthetic resin, preferably polyvinyl chloride (PVC). The point is different, and the shape of each part is also different in that it is configured to be integrally formed of polyvinyl chloride.

  However, the same numeral portions are the same action and effect portions and represent the difference in shape and the like based on the difference in the material. For example, the attachment portion 1A in FIG. It is said.

  The basic configuration of the deformation prevention tool 5A is the same as that of the deformation prevention tool 5 of FIG. 1, and is an attachment portion 1A, a contact portion 2A, and a support portion 3A. The insertion hole 3a and the nail insertion portion 3b provided in the support portion 3A are also common.

  Among the differences, it should be particularly noted that in the deformation preventing tool 5A, the attachment portion 1A is provided not on the female screw portion 1a but on the appliance mounting portion KA of the wiring box cover K to be assembled. It is a point provided with an engaging projection 1b that engages with the mounting hole KB.

  When the deformation preventing tool 5A is used by being assembled to the wiring box cover K, it is as shown in FIG.

  In this case, the engagement protrusion 1b of the attachment portion 1A of the deformation preventing tool 5A is fitted into the attachment hole KB provided in the device attachment portion KA of the wiring box cover K, and the engagement state of both is maintained. As a result, the same effects as those of the deformation preventing tool 5 are exhibited.

  Also in the case of this deformation preventing tool 5A, the gradient of the abutting portion 2A is closer to the instrument mounting portion KA that abuts in the direction from the attachment portion 1A to the support portion 3A, that is, the abutting portion 2A and the instrument mounting. When the portion KA is fitted, when the compressive force is applied from the device mounting portion KA of the wiring box cover K corresponding to the contact portion 2A, the deformation preventing tool 5A is attached to the surface side, that is, the wall surface. A pressing force is generated to the side, and this force is received by the attachment portion 1 and the back surface of the instrument mounting portion KA, so that the deformation preventing tool 5A can be prevented from falling off.

  FIG. 5 shows another example of the deformation preventing device according to the present invention, in which (a) is a front view thereof, (b) is a plan view, (c) is a cross-sectional view of the main part in use, and (d) is used. It is a front view of a state.

  In comparison with the deformation preventing tools 5 and 5A described with reference to FIGS. The support portion 3B has an abutment portion 2B that abuts against the surface-side facing portion of the instrument attachment portion KA, and an attachment portion 1B. Are different in that they support the compressive force of concrete placement.

  The plate thickness of the attachment portion 1B is a bulge to the surface side of the instrument mounting portion KA, and the thickness does not hinder the use of the wiring box cover K, etc., and the strength of connection with the support portion 3B More specifically, the thickness is preferably about 0.2 mm to 0.5 mm.

  The attachment portion 1B is provided with a screw hole 1c through which a screw B inserted through the instrument mounting portion KA is inserted.

  The abutting portion 2B is configured as side surfaces on both ends of the support portion 3B. As shown in the figure, if the shape corresponds to the surface shape of the instrument mounting portion KA with which it abuts, a better abutting state and fitting state can be obtained. It is formed.

  The thickness of the support portion 3B may be any thickness as long as it can be fitted between the instrument mounting portions KA and can withstand the compressive force of concrete placing, but specifically, about 2 mm to 5 mm is sufficient.

  The insertion hole 3a and the nail insertion portion 3b provided in the support portion 3B are common to those of the deformation preventing tools 5 and 5A.

  When using this deformation preventing tool 5B, as shown in FIGS. 5C and 5D, the surface of the wiring box cover K is so fitted that the abutting portion 2B fits into the fixture mounting portion KA. From the side (wall side), the attachment part 1B (the back side) may be brought into contact with the surface of the instrument mounting part KA, and the screw B may be inserted into the screw hole 1c and screwed.

  Even if concrete is placed on the cover K for the wiring box to which the deformation preventing tool 5B is attached, the deformation preventing tool 5B does not fall off due to the attachment by the screw B, and the placing compressive force is applied to the tool. Even if it acts on the attachment part KA, the support part 3B supported via the abutment part 2B prevents the instrument attachment part KA from being deformed, particularly on the surface side thereof. It will not be a hindrance.

  Further, in the case of the deformation preventing tool 5B, the deformation preventing tool 5B can be conveniently contacted to the wiring box cover K and screw B can be screwed only on the surface side of the cover K.

  Also, in the case of this deformation prevention tool 5B, if the gradient in the thickness direction of the support portion 3B of the contact portion 2B is set so as to be closer to the instrument mounting portion KA as the distance from the attachment portion 1B is increased, When a compressive force is applied to the instrument mounting portion KA, a component force is generated so that the abutting portion 2B is directed to the back side of the instrument mounting portion KA, and this component force is received by the attachment portion 1B. Combined with the shape of the contact portion 2B, there is an effect that the deformation preventing tool 5B is not detached from the instrument mounting portion KA even if there is a vibration of placement.

  Therefore, in this case, the screw hole 1c of the attachment portion 1B may not be used.

  The deformation preventing tool of the present invention can be used for an electrical work tool that is required to be prevented from being deformed by placing concrete, such as a cover for a wiring box or a wiring box that is embedded in a concrete wall.

It shows an example of the deformation preventing tool of the present invention, (a) is a front view thereof, (b) is a side view. It shows the use state of the deformation prevention tool of FIG. 1, (a) is a principal part sectional view of the portion where the deformation prevention tool is installed, (b) is a front view The other example of the deformation preventing tool of the present invention is shown, in which (a) is a rear view thereof, (b) is a partially broken side view, (c) is a front view, (d) is an opposite side view, (e) ) Is the bottom view of (c) FIG. 3 shows a use state of the deformation prevention device of FIG. 3, (a) is a cross-sectional view of the main part of the portion where the deformation prevention device is installed, and (b) is a front view. The other example of a deformation | transformation prevention tool of this invention is shown, (a) is the front view, (b) is a top view, (c) is principal part sectional drawing of a use condition, (d) is a front view of a use condition. The conventional cover for a wiring box in consideration of deformation prevention is shown, (a) is its front view, (b) is a YY sectional view of (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1A, 1B Attachment part 1a Female thread part 1b Engagement protrusion 1c Screw hole 2, 2A, 2B Contact part 3, 3A, 3B Support part 3a Insertion hole 3b Nail insertion part 5, 5A, 5B Deformation prevention tool K Cover for wiring box KA Device mounting part KB Mounting hole

Claims (9)

A cover for a wiring box or an anti-deformation tool for a wiring box used by being embedded in a concrete wall,
The wiring box cover or the wiring box is spanned between a pair of instrument mounting portions, and has a strength capable of resisting a compressive force that can act between the instrument mounting portions by placing concrete. A pair of attachment parts that are detachably attached so as not to fall off the instrument attachment part, and are located on the back side of the instrument attachment part, and are used for attachment to the instrument attachment part, and the attachment part And a pair of abutment portions that abut against the facing portion of the instrument mounting portion, and a support portion that connects the abutment portions and supports the compression force . The deformation preventing tool according to claim 1 , wherein the attachment portion is provided with a fitting protrusion that fits into an attachment hole provided in the instrument attachment portion. The deformation prevention tool according to claim 1 , wherein the attachment portion is provided with a female screw portion into which a screw inserted into the instrument mounting portion is screwed. A wiring box cover or wiring box deformation prevention tool embedded in a concrete wall and used between the pair of appliance mounting portions of the wiring box cover or the wiring box. It has a strength that can resist the compressive force that can act between the instrument mounting portions, and is detachably mounted so as not to fall off the instrument mounting portion even by the placement,
A pair of attachment portions that are in contact with the surface side of the appliance attachment portion and have a thickness that does not hinder the use of the wiring box cover or the interconnection box, and are used for attachment to the appliance attachment portion, and the appliance attachment An anti-deformation tool comprising: an abutting portion that abuts against a surface-side facing portion of the portion; and a support portion that connects the attachment portion and the abutting portion and supports the compressive force. The deformation preventing tool according to claim 4 , wherein the attachment portion is provided with a screw hole through which a screw inserted into the instrument mounting portion is inserted. The deformation preventing tool according to claim 1 or 4, wherein the pair of abutting portions are fitted and attached between the appliance attaching portions. The insertion hole into which the bolt for drawing the front for the said cover for wiring boxes or the front of a wiring box to a concrete formwork is inserted is formed in the said support part, The Claim 1 characterized by the above-mentioned. Deformation prevention tool. The supporting portion, claim 1, characterized in that the nail insertion portions for fixing the deformation prevention member on the concrete form to be leaning against the front of the wiring box cover or wiring box is provided 7 Any deformation preventing tool according to any one of the above. The deformation prevention tool according to any one of claims 1 to 8 , wherein the deformation prevention tool is configured to be attachable from a surface side of the instrument attachment portion.

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