JP3795707B2 - Strength comparison device for joint structure between wood - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a strength comparison sensation apparatus for comparing the connection strength between woods having different connection structures.
[0002]
[Prior art]
In building a building such as a house, the connection structure for connecting the timber to the timber is connected by various methods.
[0003]
[Problems to be solved by the invention]
However, it is difficult to understand how much strength is different between the two due to the difference in the connection structure. Thus, there has been a demand for a device that can be used to compare and feel the connection strength using test pieces having different connection structures.
[0004]
[Means for Solving the Problems]
The strength comparison experience apparatus in the joining structure between the woods of the invention which concerns on Claim 1 is an apparatus which compares the connection strength between the woods from which a connection structure differs, Comprising: It inclines below from the rear part to the front part, and connection of both ends A mounting surface on which an H-type test piece having a different structure is placed, and a web portion of the test piece is sandwiched with the H-type test piece projecting orthogonally from the placement surface and rotated by 90 °. The front and rear left and right four support members that support the inside of the upper piece portion and the lower piece portion, and moving means for moving the front left and right two support members or the rear left and right two support members of the support members forward and backward, Load detecting means for detecting a load related to the test piece by moving the front left and right two supporting members or the rear left and right supporting members by the moving means, and a display section for displaying the load detected by the load detecting means. With things That.
[0005]
The strength comparison experience device in the joint structure between wood of the invention according to claim 2 is such that the upper space of the mounting surface is covered with a protective cover.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0007]
1 and 2 show the overall configuration of the strength comparison sensation apparatus in the joint structure between woods.
[0008]
This strength comparison sensation apparatus 1 has a mounting surface 2 on which an H-type test piece A having different connection structures at both ends is mounted, and projects perpendicularly from the mounting surface 2, and rotates the test piece A by 90 °. The left and right four support members 31, 32, 33, 34 supported in the state of being moved, and the moving means 4 for moving the rear left and right two support members 33, 34 out of the above support members (see FIG. 2) When the rear left and right two support members 33 and 34 are moved in the separating direction (backward) with respect to the front left and right two support members 31 and 32 by the moving means 4, the test piece A A load detection unit (described later) that detects the load and a display unit 6 that displays the load detected by the load detection unit are provided.
[0009]
Here, a specific structure of the test piece A will be described with reference to FIGS.
[0010]
This test piece A is formed in an H shape by joining intermediate portions of two pieces of wood A2 and A3 to both ends of one piece of wood A1 which becomes a web portion, and a joint portion Aa having a different joint structure. , Ab.
[0011]
Specifically, as shown in FIG. 4, the joint Aa has a joint recess A <b> 21 having the same shape as the joint convex A <b> 11 formed at the center of one side surface of the wood A <b> 2 with a joint convex A <b> 11 protruding from one end surface of the wood A <b> 1. After being fitted into the connector, the connection is made by nailing into a plurality of nail holes A41 formed in the connection fitting A4 with a T-shaped connection fitting A4.
[0012]
On the other hand, the joint Ab is inserted into a fitting hole A31 formed at the center of one side surface of the wood A3 with a cylindrical connection fitting A5 provided so as to protrude from the center of the other end surface of the wood A1, and then the wood A3. The connection pin A6 is driven by driving the connection pin A6 into the connection hole A51 formed in the connection fitting A5 through the connection hole A32 formed on the upper surface. Note that the attachment of the connection fitting A5 to the wood A1 is performed in the same manner as the attachment of the connection fitting A5 to the wood A3 described above.
[0013]
The mounting surface 2 constitutes the upper surface of the apparatus main body 1a, and is formed as an inclined surface inclined downward from the rear part to the front part. The test piece A mounted on the mounting surface 2 is easy to see from the front. It is made like that.
[0014]
The front left and right two support members 31 and 32 are fixed to the upper surface of the base 1b whose lower ends are disposed below the placement surface 2, and the upper ends of the support members 31 and 32 with respect to the placement surface 2 described above. When the test piece A is placed on the placement surface 2 in a state of being rotated 90 ° on the placement surface 2, it is projected on the upper part of the wood A2 serving as the lower piece and the wood A1. It arrange | positions so that it may be located in the left-right side of one end part.
[0015]
The rear left and right support members 33 and 34 are arranged to face the front left and right support members 31 and 32, and their lower ends are provided on the base 1b so as to be movable in the front-rear direction. The upper end of the movable body 41 is fixed and protruded by a predetermined length in a direction orthogonal to the placement surface 2, and the test piece A is rotated 90 ° on the placement surface 2. When placed in a state, it is arranged so as to be positioned at the lower part of the wood A3 as the upper piece and on the left and right sides of the other end of the wood A1.
[0016]
The moving body 41 is provided so as to be movable back and forth along the inclination of the mounting surface 2 by a guide rail 42 laid on the upper portion of the base 1b.
[0017]
The movable body 41 is connected to an expansion / contraction portion of a jack device 43 that is expanded and contracted by a motor (not shown) via a load cell 5 as a load detection means. As a result, the upper portions of the two left and right support members 33, 34 fixed to the moving body 41 move back and forth on the mounting surface 2.
[0018]
That is, the moving means 4 which moves the back left and right support members 33 and 34 back and forth by the moving body 41, the guide rail 42, the jack device 43, and the motor described above is configured.
[0019]
In addition, in order to allow the movement of the two support members 33, 34 on the left and right as described above to the portion of the mounting surface 2 where the two support members 33, 34 on the left and right are arranged as shown in FIG. The long hole 21 is formed.
[0020]
The detection signal detected by the load detection means described above is input to a control device (not shown), and the load is displayed on the display unit 6 through this control device.
[0021]
The display unit 6 is arranged on the front surface standing from the upper end of the mounting surface 2 so that a visitor can easily see.
[0022]
The upper space of the mounting surface 2 is covered with a protective cover 7. The protective cover 7 is a transparent body composed of a front surface, left and right side surfaces, and an upper surface, and allows a visitor to safely see the state of the test piece A placed on the placement surface 2 through the protective cover 7. .
[0023]
The protective cover 7 is provided with an opening / closing door (not shown), and the test piece A can be freely taken in and out of the protective cover 7 through the opening / closing door.
[0024]
Reference numeral 81 shown in FIGS. 1 and 2 is a start switch provided on the front face of the apparatus main body 1a, and 72 is a stop switch provided on the front face of the apparatus main body 1a.
[0025]
Next, using the strength comparison sensation apparatus configured as described above, explanation will be given on the procedure for having the sensation experience how the strength of both ends of the test piece A having different connection structures is different. To do.
[0026]
First of all, a visitor actually makes a test piece A. That is, by having both ends of the wood A1 and the woods A2 and A3 joined as described above, the difference in the joint structure is felt on the skin.
[0027]
At this time, it is difficult to join a number of nails to join the wood A1 and the wood A2, but it is difficult to join, and only one connection pin A6 is driven to join the wood A1 and the wood A3. Therefore, you can feel the difference in the labor spent on production.
[0028]
Next, the prepared test piece A is inserted into the protective cover 7 through the opening / closing door, and the four support members 31, 32, 33, and 34 are rotated with the test piece A rotated by 90 ° as shown in FIG. And placed on the placement surface 2.
[0029]
And the start switch 81 is pushed and the jack apparatus 43 is extended through a motor. As a result, the moving body 41 moves upward along the guide rail 42, and the two left and right support members 33, 34 move upward, so that the two pieces of wood A2, A3 of the test piece A are removed from the wood A1. A force is applied to the test piece A so as to be pulled apart.
[0030]
At this time, in the load detection means, the load applied to the test piece A is detected by the load cell 5, and the load at that time is displayed on the display unit 6 through the control device.
[0031]
Specifically, as the two rear left and right support members 33 and 34 are gradually moved upward, the load value displayed on the display unit 6 becomes larger, and according to this, the wood A1 and A2 of the test piece A Are deformed so that the T-shaped connection fitting A4 is extended, and a gap is gradually formed between the end of the wood A1 and the wood A2. That is, the visitor can easily understand that the joint Aa is destroyed.
[0032]
If the visitor knows that the joint Aa has been destroyed, the upward movement of the two rear left and right support members 33 and 34 is stopped to stop the test piece A from being destroyed. , 34 is moved downward to return to the original position.
[0033]
Thereafter, the tas piece A is taken out from the mounting surface 2 to the outside of the protective cover 7, and a visitor confirms the destruction of the joint Aa due to the deformation of the T-shaped connection fitting A4 near the visitor. With respect to, the connection pin A6 is pulled out, and the wood A1 and the wood A3 are separated again, and it is confirmed that there is no abnormality in the joint structure.
[0034]
Thereby, the visitor can understand at a glance that the difference in bonding strength between the bonding portion Aa and the bonding portion Ab, that is, the strength of the bonding portion Ab is excellent and the construction is simple.
[0035]
【The invention's effect】
As described above, an H-shaped test piece having different connection structures at both ends is placed on the placement surface, and the front left and right two supporting members or the rear left and right two supporting members are moved by the moving means to join the test pieces. By applying a load in the direction of breaking the joint, and showing the breakage of the connection part of the test piece to the visitor, it is possible for the visitor to understand the difference in strength between joints with different connection structures at a glance. it can. As a result, the visitor's willingness to purchase about a house that employs a connection structure having excellent strength can be stimulated, which can be a great selling point.
[Brief description of the drawings]
FIG. 1 is a front view showing a configuration of a strength comparison sensation apparatus in a joining structure between woods.
FIG. 2 is a side sectional view showing a configuration of a strength comparison feeling device in a joint structure between woods.
FIG. 3 is a perspective view showing a configuration of a test piece.
FIG. 4 is an exploded perspective view showing a configuration of a test piece.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Strength comparison feeling apparatus 2 Mounting surface 31, 32, 33, 34 Support member 4 Moving means 41 Moving body 42 Guide rail 43 Jack apparatus 5 Load cell (load detection means)
6 Display 7 Protective cover

Claims (2)

A device for comparing and feeling the connection strength between woods with different connection structures,
A mounting surface on which an H-shaped test piece that is inclined downward from the rear to the front and has different connection structures at both ends is mounted;
Front, back, left, and right 4 projecting perpendicularly from the mounting surface and supporting the inner side of the upper and lower pieces with the web portion of the test piece sandwiched by 90 ° with the H-shaped test piece rotated 90 ° A support member of the book;
A moving means for moving the front left and right two support members or the rear left and right two support members back and forth among the support members;
Load detecting means for detecting a load related to the test piece by moving the front left and right two supporting members or the rear left and right two supporting members by the moving means;
A strength comparison experience device for a joint structure between woods, comprising a display unit for displaying a load detected by a load detection means. A strength comparison feeling device in a joint structure between woods, wherein the upper space of the mounting surface is covered with a protective cover.

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