Trestle

A trestle for installing a panel at an installation place, the trestle comprising:

• a base portion fixed to the installation place;
• a crosspiece portion supported by the base portion;
• and
• an attachment portion for attaching the panel to the crosspiece portion, wherein
• the attachment portion includes a first attachment portion to press the panel in a pressing direction pointing toward the crosspiece portion and clamp the panel between the first attachment portion and the crosspiece portion and a second attachment portion placed on a placement surface of the crosspiece portion, and
• the first attachment portion is combined with the second attachment portion in such a manner as to be able to slide the panel in the pressing direction, wherein
• a projecting plate portion that extends in the pressing direction is formed on the first attachment portion and the second attachment portion, a slide surface on which the projecting plate portion slides is formed, wherein
• a groove portion that extends in an extending direction of the crosspiece portion is formed from an outer circumferential surface of the crosspiece portion toward an inside,
• the attachment portion includes a bolt inserted into the first attachment portion and screwing into the second attachment portion, and
• the panel is clamped between the first attachment portion and the crosspiece portion by an axial force introduced into the bolt, wherein
• the second attachment portion includes a locking portion coming into contact with a surface of the panel on an opposite side to a surface of the panel on which the first attachment portion presses the panel, wherein
• the placement surface is formed on a projecting portion that is formed inside the crosspiece portion and in the groove portion,
• the second attachment portion includes a bottom wall portion housed in the groove portion and temporarily placed on a placement surface and the locking portion rising from the bottom wall portion, and
• a width of the bottom wall portion is wider than a width of the groove portion and when an axial force of the bolt is introduced, the bottom wall portion is caught by the crosspiece portion in the groove portion.