JP3187545U - Sliding ruler unit for work chair - Google Patents

Abstract

Provided is a slide ruler unit which is installed on a work chair used as a table when using a saw and can securely fix a piece of wood to be cut using a foot.
A sliding ruler unit capable of fixing a piece of wood on a side surface of a work chair while adjusting the position according to the width thereof, a rectangular substrate fixed in advance to a leg portion of the work chair 2 and a ruler assembly 1 that slides on the substrate while maintaining a parallel position with the seat plate. In the substrate, an elongated through groove 21 for guiding the ruler assembly is formed in the longitudinal direction of the substrate. On the other hand, the ruler assembly is attached to the ruler plate 11 that slides on the substrate, the guide plate 12 that is fixed to the ruler plate and slides linearly in the through hole, and is detachably attached to the guide plate by bolts and nuts. The fastening plate 13 is configured. The seat plate and the ruler plate sandwich the piece of wood without gaps, and the ruler plate is fixed by tightening the nut when the ruler plate stops.
[Selection] Figure 2

Description

  The present invention relates to a slide ruler unit used by being installed on a work chair when using a saw, and a work chair on which the unit is installed.

It is in the middle grades of elementary school that children begin to use saws at school. In the Elementary School Guidance Guidelines, in the Drawing Art Department, the third “Creation of Instruction Plans and Handling of Contents”, (3) A “In the third and fourth grades, wood chips, boards, nails, watercolors , Use small swords, easy-to-use saws , hammers, etc., and allow children to handle them properly. ”

  In actual instruction, lay a work chair in the craft room sideways, place a piece of wood to be cut on this, use the seat plate of the chair as a stopwood, further hold the wood piece with your feet and grind the saw Often the method is used by students.

  The above-mentioned method of fixing a piece of wood with the foot of the chair's seat and fixing the piece with a foot reduces the frictional force of the sole and the friction between the saw blade and the wood increases as the cutting progresses. It may become impossible to fix the material.

  In particular, pre-growth elementary school students often have limited hand-grip strength and the power they can put on their feet, which often causes the wood to move, resulting in less efficient learning. In such a case, in addition to pressing with a foot, if there is a mechanism that assists in fixing the piece of wood to the work chair itself, learning can proceed smoothly. Safety measures are also an issue for middle school children who use saws for the first time at school.

  In view of the above problems, the present invention provides an auxiliary tool that can be installed on a work chair used as a stand when using a saw and can securely fix a piece of wood to be cut using a seat plate and feet. And

  In order to solve the above problems, the present invention provides a sliding ruler unit capable of fixing a piece of wood to be cut to the side surface of a work chair while adjusting the position according to the width thereof.

  This unit is composed of a rectangular substrate fixed to the leg portion of the work chair by nailing or the like, and a ruler assembly that slides on the substrate while maintaining a parallel position with the seat plate. In addition, for a work chair that already has a plate laid on one side, the plate can be processed and used as the substrate.

  In the substrate, elongated through grooves are formed in the longitudinal direction of the substrate (direction perpendicular to the seat plate). On the other hand, the ruler assembly includes a ruler plate that slides on the substrate while maintaining a parallel position with the seat plate, a guide plate that is fixed to the ruler plate, and is fitted into the through hole, and a fastening member to the guide plate It is comprised by the fastening plate detachably installed by.

  As described above, the board is permanently installed in advance on the leg of the work chair. On the other hand, the ruler assembly is detachable, so that it can be removed when the cutting operation with a saw is not performed.

  In use, the ruler assembly is set on the substrate by inserting the guide plate / fastening plate into the through groove of the substrate. The guide plate has the same width as the short width of the through-groove of the substrate, and the guide plate slides linearly in the through-groove so that the ruler plate can be slid. On the other hand, the fastening plate is movably attached to the substrate when the ruler plate slides, but when the ruler plate is fixed, the base plate is narrowed in cooperation with the ruler plate on the base plate side, and the ruler plate is firmly attached. And has a role to fix.

  First, a space for placing a piece of wood on the substrate is secured by sliding the ruler plate. Next, the piece of wood is placed on the substrate while being in close contact with the seat plate. Finally, the ruler plate is returned to the seat plate direction, and a piece of wood is sandwiched between the seat plate and the ruler plate without any gap, and the ruler plate is fixed by operating the fastening member at a position where the ruler plate stops.

  By installing the slide ruler unit on the work chair when cutting a piece of wood with a saw, the work can be performed with the piece of wood securely fixed.

  Since the work can be performed with a fixed piece of wood, elementary school students unfamiliar with the use of the saw can concentrate and learn how to grind the saw.

  The risk of injury is reduced by moving the wood piece out of the way, which increases safety in class.

  With the exception of the board, the ruler assembly can be removed, so it will not interfere with regular classes or cleaning.

  Since it has a simple structure, the production cost can be reduced.

It is a perspective view of the work chair before installing a slide ruler unit. (A) is a work chair with a board. (B) is a work chair without a board. The structure of a slide ruler unit is shown. (A) is a perspective view of a ruler assembly. (B) is a perspective view of a base. It is a front perspective view of the work chair which installed the slide-type ruler unit. It is a perspective view when setting a piece of wood to a slide ruler unit. It is a back surface perspective view of the work chair which installed the slide-type ruler unit. It is a conceptual perspective view which shows a state when working.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.

  The chair on which this unit is installed is a work chair without a backboard used in an elementary school craft room (Fig. 1). There are two types of work chairs (A) in which a plate is laid on one side in advance (A) and those without a plate (B).

  As shown in FIG. 2, this unit includes a ruler assembly 1 and a base 2. An elongated through groove 21 is formed in the substrate 2 in the longitudinal direction of the substrate 2 (direction perpendicular to the seat plate 3). On the other hand, the ruler assembly 1 is a vertically long ruler plate 11 that slides on the substrate 2 while maintaining a parallel position with the seat plate 3, and a guide plate 12 that is fixedly attached to the ruler plate 11 and is movably fitted in the through groove 21. And a fastening plate 13 detachably attached to the guide plate 12 by bolts 14 and wing nuts 15 used as fastening members.

  The substrate 2 is permanently installed in advance by nailing the leg portion 4 at a position from the seat plate 3 to the leg penetration 5 of the work chair. In addition, a work chair on which a plate has been laid from the beginning can be used with the substrate 2 as a board 2 and through holes 21 formed therein. On the other hand, the ruler assembly 1 is set on the substrate 2 when using a saw.

  In use, the work chair is laid sideways with the substrate 2 up, and the ruler assembly 1 is set on the substrate 2. First, the wing nut 15 of the ruler assembly 1 is loosened, the fastening plate 13 is turned to a position where it can be fitted into the through hole, and then the fastening plate 13 and the guide plate 12 are inserted into the through groove 21. At this time, if the short width of the fastening plate 13 is larger than the short width of the through groove 21, the wing nut 15 and the fastening plate 13 are once removed from the bolt 14, and the guide plate 12 is inserted into the through groove 21. The fastening plate 13 and the wing nut 15 are attached to the bolt 14 on the back side (FIGS. 3 and 5).

  Since the width of the guide plate 12 is substantially the same as the short width of the through groove 21, the guide plate 12 slides linearly in close contact with the inner wall of the through groove 21, and the ruler plate 11 integrated with this slides. Is possible.

  Next, one side of the tree piece 6 to be cut is placed on the substrate 2 while being in close contact with the seat plate 3, and the ruler plate 11 is slid in the direction of the seat plate 3 to be in close contact with the opposite side of the tree piece 6. (FIG. 4). While holding the ruler plate 11 with one hand and holding the ruler plate 11 with the gap between the seat plate 3 and the ruler plate 11, the other hand is turned to the back side of the base 2, and the fastening plate 13 is connected to the through groove 21. Rotate to a right angle position and tighten the wing nut securely (Figure 5). As a result, the ruler plate 11 and the fastening plate 13 narrow the substrate 2, and the piece of wood 6 and the ruler plate 11 are fixed.

  The working method is the same as usual, and the saw 7 is ground while stepping on the piece 6 with one foot (FIG. 6). Since the piece of wood 6 fixed by the ruler plate 11 and the seat plate 3 does not shift laterally or obliquely, even elementary school students who are unfamiliar with the use of the saw and have low treading pressure can concentrate and learn how to grind the saw.

  As described above, the many features and excellent points of the present invention have been described in the above-described embodiment with the details of the structure and function of the present invention. However, the present invention is within the scope of the principle of the present invention. Expand the words used in the claims of the new model registration to a broad and general meaning, and select / change details such as the type of chair, the shape, size and material of each part. Implementation is possible.

DESCRIPTION OF SYMBOLS 1 Ruler assembly 11 Ruler plate 12 Guide plate 13 Fastening plate 14 Bolt 15 Wing nut 2 Substrate 21 Through groove 3 Seat plate 4 Leg part 5 Leg penetration 6 Wood cut 7 Saw 8 Foot

Claims (3)

A sliding ruler unit installed on the side of a work chair that becomes a base when cutting a piece of wood using a saw,
A substrate having a longitudinal through groove formed in the longitudinal direction;
A ruler plate slidably movable on the substrate;
A guide plate fixed to the ruler plate and sliding in the through groove;
A fastening plate detachably attached to the guide plate by a fastening member;
The board is fixed to the work chair leg, and the guide plate fixed to the ruler plate slides linearly in the through groove to slide the ruler plate, The ruler plate and the fastening plate narrow the substrate to fix the ruler plate by operating the fastening member at a position where the seat plate and the ruler plate are in close contact with opposite sides of the piece of wood. A sliding ruler unit.   Two or more through-grooves of the same length are drilled in parallel with each other on the substrate, and the guide plate and the fastening plate are respectively installed at positions corresponding to the through-grooves of the ruler plate. A sliding ruler unit that increases a narrow pressure applied to the substrate when the ruler plate is fixed, and prevents the ruler plate fixed at a desired position from moving and shifting.   A work chair serving as a table when a piece of wood is cut using a saw, wherein the slide ruler unit according to claim 1 or the slide ruler unit according to claim 2 is installed. A working chair.